Binary option calculator - man1mataram.sch.id

TMC5041: Dual stepper motor *controller*

This is a magic box. You send it either a location or a velocity (via SPI), and it manages _everything_. Computes and controls lovely velocity curves. Works hard to avoid step loss. Runs your steppers "silently". All of this without your uC wasting time calculating and banging STEP/DIR pins like a caveperson.
https://www.trinamic.com/products/integrated-circuits/details/tmc5041-la/
The 5041 can drive 5-26V and 2x 1.1A with no additional FETs. It's the dual driver P/N, though they also have other options in the family for single and/or higher amperage. I'd start with this one because there's a 5041-BOB available on Digikey ($19).
The upsides are hard to overstate. The downsides are... nontrivial. First, it's too expensive to use for most consumer products- lowest price is around $4.50. There are no knockoff, drop-in substitutes I've found.
Second, you have to learn the datasheet. For real. There are a lot of config registers, all need to be set, many of the settings need to be calculated in relation to others beforehand, many of the modes are incompatible despite being on different bits so they can be set simultaneously. It is a mess. They included a couple of flowcharts, but... someone needs to build a calculator for this with a nice UI. Their examples are misleading (though they work) because they've chosen to write the config registers in hex, and the bits that need to be set don't line up with the 4-bit hex blocks... so a setting will have it's high bit and low bit broken across two hex chars. If you choose to use this IC, you will be much better off writing them out in binary.
I started writing a library for this to make it easier, but didn't finish it. Lmk if you want to make a go of it: https://hackaday.io/project/158935-haroco-the-designlab/log/149276-fancy-stepper-motor-controller-update
In contrast to the last two posts, this IC is not cheap. It is not easy to use. But it *is* a fundamental improvement to how you've used stepper motors before.
submitted by jenesaisdiq to nicechips [link] [comments]

OBLIGATORY FILLER MATERIAL – Breaking Bad, Part 3

Continuing
“Hello and good day, gentlemen”, I say. “I am Doctor Rocknocker. You may and will refer to me as ‘Rock’. OK? None of this ‘Doctor’ or ‘Sir’ guff. We green here?”
There was a buzz of voices but no direct answers.
“OK. Let’s get a few things down right here and now.
(1.) Call me Rock.
(b.) Answer me loudly. I will need to hear you loud and clear. Best get used to that now.
(iii.) “We green?” means “Are we in agreement?” It’s a form of shorthand I use here and in the field.
(⍾.) “You diggin’ me, Beaumont? means you’ve really done gone and pissed me off; you’ve done something untoward. Pray you never hear that phrase, and,
(∞.) I’m the boss. The top dog. The hookin’ bull. The Maharaja here. I possess the first, final and only words you’re going to listen to for the next couple of weeks. What I say, goes. Any problem, please let me know now so we can replace you most quickly.”
A gentle buzz, but no replies.
“Gentlemen. Do we agree?” I ask.
“Yes, Rock.” Was the reply.
OK, there might be some form of a societal prohibition against making loud noises. That’s the first thing that has to go.
“Gentlemen, we will be working in the great outdoors where there are wind, rain, waves, and other environmental nonsense making all sorts of unrequited noise. We need clear and proper lines of communication. I need to hear you clearly and vice-versa. When speaking, you will speak slowly, clearly, and loudly. “
DO WE AGREE!?!” I yell, rather deafeningly.
“YES, ROCK!” came the eventual reply.
“Outstanding”. I ponder.
Continuing…
“Mr. Sanjay is my de facto second in command. If I’m out having a smoke, taking a piss, or having a snort, he’s in charge. Listen to him as if I suddenly lost 150 pounds, shaved my beard, and inexplicably become Indian.” I chuckled.
They seemed to enjoy that. I actually elicited a few chuckles.
“Mr. Sanjay will now distribute to you your locker boxes. You will wait until he hands you yours. Do not get up and mill around the room. We green?” I ask.
“Green! Doctor Rock.” Came the noisy reply.
“Progress. Marvelous.”, I reflect.
“I’ll be right back. Mr. Sanjay, the room is yours.” I note. I might need to cut back on the coffee.
I slope off to the loo and it’s just as horrible as you can imagine an outdoor communal shithouse in sunny India attended by 30,000 Indian gentlemen could be.
Fuck COVID-19. I’m thinking hot and cold running dysentery, dengue, and death here. Ick.
Glad I have a highly functioning immune system.
I retrieve a shiny aluminum Halliburton™ case from Headquarters and ease off to an unused office space to change.
I went from my usual field garb to full PPEs. It was quite a sight.
I’ll be telling you about it in mere moments. Contain the excitement.
I’m walking back to Outbuilding #2 and damned if my get-up didn’t elicit a few gasps, shielded guffaws, and a salute or two. I have to admit, to the uninitiated, I was a sight right out of Area 52, the more secret one, west by northeast of Roswell, New Mexico.
I get back to the outbuilding and enter. Everyone was looking through their locker boxes, chuckling about their good fortune and wondering with Joker-like glee what the hell all these wonderful gizmos were and where did I get them? They all stopped dead in their tracks when I walked in.
Their silence was palpable.
“Gentlemen”, I said, “Here’s how you are going to look at work tomorrow. Revel in its utility, comfort, and extreme fashion sense.” I did a quick spin like I used to on the runway.
At O’Hare when we were doing field geostatic tests. Whatever were you thinking?
Anyways…
I was wearing a pair of size 66-XTall NFPA 70E blaze orange Carhartt Nomex coveralls. I had on a Dax carbon-fiber blaze orange “Coal Scuttle” hardhat with swing-away hearing protection keyed into your personal communications module, and a gold-anodized, pull-down full face shield. The helmet was designed to drain away falling water down over one’s back and not down one’s neck.
I had a pair of ‘wet’ gloves under the snap retainer on my left shoulder, a pair of ‘dry’ gloves on my right. I was wearing an orange CMC Safety 9-point safety and rescue harness, good to well over 1,500 pounds. Over both shoulders, around the crotch, up the front, and around the back, X-style. This popular harness features multiple D-ring attachment points and the patented JackBack removable padding with breathable D-3 cloth, which keeps shoulder straps separated and makes donning and doffing a breeze. It had several catch-points where one could easily and readily attach to the snap carabiners and get bodily dragged out of a nasty situation by rope or chain. The front waist D-ring allows a comfortable, stable sitting position for rappels and the sternum D-ring works well for helicopter or crane-assist hoists. Gear loops offer easy access to equipment, and quick-connect-disconnect shoulder straps and leg loops make the harness quick to don or doff. It could be used for impromptu spelunking on days off.
I had on Size 16 EEE Gear Box 8088 Men's 8 inch Black Leather intrinsically-safe hard-toed lace-up black turned-heel leather work boots with the new self-cleaning, oil-and chemical resistant Vibram soles.
They couldn’t see, but I was also wearing a cotton-Nomex blend wifebeater and boxers as well. Nomex tends to chafe. Best be safe.
I had a powerful Maglite flashlight clipped to my rescue harness, as well as my mini Air Horn; a blaster’s must. I also had a mobile VHF-Commslink™ radio in a pocket on the back of my coveralls on the left shoulder. I had the microphone for it Velcro-ed to my rescue harness within easy reach. Very cop like. Very cool. Very necessary.
I had a traditional Zippo and Bic Butane lighters in my right-hand chest pocket and a brace of cigars, though these were optional, in my left pocket. I carried a bespoke constructed Swiss Army Knife on a lanyard in my right front pocket and had a custom Bears Paw Leatherman hanging on the left of my rescue harness.
Also clipped to the harness was a Silva orienteering compass. There was a selection of NASA write anywhere pens, Sharpies, and oil-writing chalk pencils in my other front pockets. I had an oil industry tally book in my other front pocket.
Why blaze orange? Well, Red Adair already co-opted bright red, and fluorescent green wasn’t available in my size.
So, we’re now ready to plant explosives in West India or go deer hunting in the Northwoods of Baja Canada.
“Questions, Gentlemen?” I asked.
I explained that in their locker boxes were purchase orders, POs, for every bit of kit I was wearing. They were to take these POs to the Company Store and get, well, kitted out in their own sizes and preferences. I wanted to see everyone back here tomorrow at 1300 hours looking as I do now. Well, maybe skip the cigar and be not quite so large.
I sat down on the table in front of the crowd and had Sanjay bring over the demo locker box.
“OK, gents,” I said, “This locker box is yours and is numbered as such. They will be stored here in Outbuilding #2. Each of you will receive a key for this building as it is now your headquarters. We’ll get back to locker boxes in a minute. Anyone need a break for a few minutes?” I asked.
No one dared answer at this magical juncture in the narrative.
“Well, I do”, I said, “Meet back here in twenty minutes. Sanjay?”
The class wandered out and I conversed with Sanjay. We found the maps I had ordered.
They were an aerial view of the breaking yard and it was split into 6 zones, all a different color. There was one master for the wall and 28 copies for the guys. I also had a log-in/log-out board made. Vertically numbered 1 to 28. There were also 7 vertical bars labeled Zone 1 through Zone 6, and one for ‘in dispose’; i.e., in Latrin-e Land. This was so I’d know where my guys were at all times.
There was a hook for each one of these areas to log in, and to let anyone know where a certain person was during the day or night. You’re number 10? And you’re going to be wielding a torch over in Zone 5? Your brass tag goes right there. You’re going to skip over to Zone 3? Get your ass back here and swap it over to where you’re going. There is no excuse for being where you haven’t said you were, short of active accident or dismemberment.
Everyone shuffles back in and I explain the tote board.
“Notice there’s no spot to leave your brass chit if you’ve gone off the reservation?” I asked. “Why do you suppose that is?”
Confused looks all around.
“Because you keep that brass token with you when you’re not on the job. Lose it, lose your job. Sounds harsh, but so is getting your fucking hands blown off. Think of it as an exercise in discipline.”
There was a very little rebuttal.
“When you are on location, your brass token will reflect where you are. You are off-site, put the brass token in your wallet next to your lucky ‘circular impression’.
There were several knowing grins in my cadets.
Wear it around your neck on a chain. Keep it on your keyring. You can wrap it up in ribbons, you can slip it in your sock; I don’t care. Thing is, it is your ticket to this job. Hold on to it, there will be no replacements. We green?”
“Green, Doctor!”
“Outstanding.”
“Now, locker boxes. Gentlemen”, I continued. “These are your personal boxes that will be archived here. They will contain everything that you will need to carry out the job initially and help you with training the next crew that comes through after I leave. Keep them neat and tidy. I like to pull unannounced locker box inspections, gentlemen. Be forewarned.”
The sound of active scribbling is music to my tinny ears.
“Now, as such”, I continue, “Each locker box, at this point, is identical. Please follow along with me as we do inventory: Each gets locker box will contain (as I pull out the item for identification):
• 1- set Purchase Orders (POs) for PPEs
• 1- Galvanometer
• 2- Blaster’s pliers
• 1- Custom Leatherman
• 1- Metal clipboard
• Various Pens, pencils, paper, etc.
• 5- Sharpies
• 1 copy: Blasters Protocols Handbook, 15th Edition
• 1 copy: Blasting and explosives safety training manual by the IEE.
• 1 copy: Theory and practice of blasting, by Hino (A classic)
• 1 copy: Blasters Handbook, 17th Edition
• Various Explosives catalogs
• 1- Custom Swiss Army Knife
• Several Butane lighters
“Are we in agreement, gentlemen?” I ask. “Please check to be certain you have what the manifest states.”
“As long as we’re going over locker boxes, let’s look at our set of PPE purchase orders. Each locker box will contain POs for:
• 1 pair Orange Nomex coveralls, in your size
• 1 Dax carbon-fibre blaze orange hardhat with ear protection, gold face shield
• 1- CMC Safety 9-point extraction harness with carabiners
• 2- pairs Safety Glasses
• 2- pairs of gloves –wet & dry
• 1- pair Gear Box 8088 hard-toed intrinsically safe 8” work boots
• 1- Silva Orienteering Compass
• 3- pairs of cotton WaterWick socks
• 1- CommsLink™ VHF radio with microphone
• 1- Maglight power flashlight
• 1- Rain suit – also Nomex, bibs and outer shell
• 1- Mini Air Horn Power Tootler
• 1- Pair cotton/Nomex blende underwear – anti-chafe, wifebeateboxer: 3 sets.
• 1- 16-ounce container ‘Babies Bottom’ Talcum powder. Nomex chafes.
“Well, that’s a lot of gear; you best become real familiar with it as soon as you can. You are responsible for your PPEs. Lose them and replace them at your own cost. Wear them out? No problem. We will replace them. Get caught on location without your proper PPEs? Alavida. Goodbye. There is no second try. Fuck up once, and you’re gone. I am here for a limited time to try and teach you characters how to blast boats. I am not here to be your wet-nurse or mother. We green?” I ask.
“YES! Green! Rock!”
“Outstanding!”
We spend about an hour going over the various contents of the locker boxes and I answer general questions about blasting and explosives.
“We will use Primacord by the mile and tons of C-4 primarily. I might introduce you to binary explosives if there’s time. We might also get into PETN and RDX. Dynamite for training. But that’s about it.”
“We will use demolition wire and electrically fired blasting caps and boosters. We might have some time to look at set-pull-forget mechanicochemical fuses. But you’ll all learn some basic electrical wiring and how to design a circuit.”
“Tomorrow, given it doesn’t rain and the creek don’t rise.”
“Time, gentlemen!” I said. It’s been a long day and I’m a bit jet-lagged knackered. Besides, I wanted to give that Jacuzzi a spin.
“OK, remember: get your PPEs tomorrow morning at the Company Store. I expect to see each and every one of you here tomorrow, kitted out and ready to go, at 1300 sharp. That’s it. See you tomorrow. Susandhya. [Good evening.]” I said.
Locker boxes are locked and stowed in an orderly fashion. Each and everyone one of my 24 acolytes come to me before he leaves work to thank me personally and shake my hand.
“This might just work out”, I say to no one in particular.
Sanjay and I head back to the Raj for the night. I’m really tired, finally feeling the jet travel hit, and not the least bit hungry.
However, I do ring up the 214 cigar dude and relieve him of a selection of fine smokes. I drop by the bar for a couple of barley-pops before I retire to my capacious room for the night.
“Sanjay”, I say, “I’m knackered. If anyone wants me, head them off until tomorrow. It can wait. I’m going to get some kip and don’t want to be disturbed. No maids, no Majordomo, no butler. I just want to get unconscious for a while.”
“No problem, Rock”, Sanjay assures me, “I’ll tell them you’ve gone bush and haven’t left a forwarding address.”
“Good man”, I say, patting him on the shoulder. Hell, I must be getting old. Shit like teaching a band of newbies and whooping a little ass would have never as much as caused me a short breath. Then again, it’s probably not the years, it’s really the mileage…
After a quick light breakfast come morning, Sanjay and I are back on location. I’m being given a tour of the place by the day-shift foreman, one Mr. Vikramaditya Shrivastava.
“Yikes”, I say to Sanjay, “You characters really go for your 11-syllable names.”
“Call him ‘Vik’, Rock”, Sanjay smiles, “Good thing you’ve never asked about my last name.”
“Probably is”, I snicker back. I’m not getting roped into this little tussle.
Vik speaks fairly passable English, but I’m still glad Sanjay is here. The first order of business is to see the explosives bunker I sent plans for and how that’s coming along. They tell me it’s almost finished and ready to be stocked with what I’ve ordered.
“Outstanding, let’s have a look,” I say.
Into the Citation Golf Cart, we go. None of this plebian walking shit. We’re MIPs, Monstrously Important People.
Plebes walk, we ride.
We drive around the piles of rusty scrap, huge hunks of bulkhead, and disconcertingly quickly through polychromatic puddles of who-knows-what to slide to a stop in front of a large canvas tent.
Think M *A *S *H-type mess tent.
“What’s this?” I ask, “Commissary? First Aid?”
“No, Dr. Rock”, Vik explains, “Here are your explosives.”
My eyes grow large.
“What do you mean?” I ask. What the fuck do you mean? I mean.
“Building of your bunker is taking more time than we expected what with your design imperatives. But your order was filled most expediently. We are storing it here until the bunker is complete.” He smiles in that inimitable Indian manner that is so irritating when they don’t realize the major fuck-up they’ve just committed.
“OK. Simmer down, Rock.” I say to myself. “Sanjay, ask him again what’s in that tent. That bottomless tent that’s just a sheet of tarpaulin held up by metal poles.”
“He says that’s your explosives order, Rock,” Sanjay says. His demeanor went from perky and helpful to terrified as he saw me turn several shades of crimson and begin to emit wisps of steam.
“Sanjay”, I said in calm, calculated terms. “You are telling me there are over 9 tons of high explosives, blasting caps, boosters, demo wire, and ANFO sitting on wet sand in this heat under a sheet of fucking tarpaulin?”
“Yes?” he stammered, with a squeak.
“OK.”, I said. “We need to keep very calm and not go completely apeshit; and I’m telling you, right now, that’s taking Augean-level effort. We have a situation here, Mr. Sanjay. A very, very dangerous and very deadly situation. Let’s above all, remain calm.”
“Right, Rock”, he replies.
I turn to Vik and say in a calm and collected tone, “YOU STUPID MOTHERFUCKER! WHAT HAVE YOU DONE?
“Calm and collected, right, Rock?” Sanjay smirks and Mr. Vik withers under my verbal assault.
“Sorry, I had to get that one out.”, I apologized, “Mr. Vik. You have created a real blockbuster here. Quite literally. I figured, erroneously it seems, that you would not take delivery of over 9 TONS of high explosives before you had a very safe and secure place to store such.”
“It arrived sooner than we thought. We got a good price on it,” he explained.
You did? Fucking great! Holy mothering fuck!
Now I was even more worried. One does not get discounts or bargain-basement deals on quality high explosives.
“Pray, Mr. Vik”, I entreated, “From where did you source these detonic components?”
“From Best Blast and Supply Llc of Hong Kong Enterprises.” He replied, “Bulk discount quantities, quick delivery bonus. Saved crore rupee.”
No. I was wrong, it could get worse.
Not only 9 tons of high explosives, 9 tons of counterfeit, knock-off, and non-regulated manufacturer explosives.
“OK”, I said, “Let’s take stock here. My bunker isn’t finished yet? Correct? So you and the company meatheads ordered 9 tons of knock-off explosives from some shady and cheesy Chinese dealer and you stored them on wet beach sand, in this heat, under a tarp? Have I got all that right?”
“Oh, yes Doctor Rock.”, he smiled.
“Sanjay”, I said in a low, firm tone, “We have a…situation. We need to cordon this area off and build an exclusion zone as far as we can around it. No one, and I mean no one, gets within what, 10 kilometers? of the tent. This thing goes off, it’s going to leave a much larger than that cone of devastation. Then we need to visit with the management of this place and have a few thousand well-chosen four-letter words. Then I can think about what the fuck we’re going to do about this situation. I’m struggling to remain calm so everyone else will, but this is just a wee bit tetchy. Find me some red flags and start planting them around the tent, working our way out. Let’s go. Calmly, collectively, and with purpose.”
We find a source of 2-meter poles with red pennants. Sanjay also finds a few miles of yellow “Danger: Stay The Fuck Away” tape. We gather then and head back to the tent. We start to spiral out from it planting flags and running tape.
We did the best we could, but we were disrupting daily business activities. Good. Let the head idiots in charge know they’ve fucked up and grandly.
Back at headquarters, I’m fuming. I’m damn mad. I’m loud and being all extremely American about all this.
“You fucking idiots! 9 tons of cheap-shit high explosives? From China? Stored on wet sand in this heat? Under a benchod tarp? Why the flying fuck do you think I sent such detailed plans for a storage bunker? Do you assholes even think?” I railed on like this for at least half an hour, going all Gene Wilder in ‘Young Frankenstein’.
“Yes, Doctor”, one Mr. Karam Kanungo, the local boss and company president said, “That is all true and steps will be taken to redress the situation. But that doesn’t address the issue at hand. What do you suggest?”
“I suggest you are all taken out and given hot coffee high colonics to clear out your thinking processes”, I spit, “But that still leaves us with a nine-ton headache out there waiting to bloom into something even more aggravating.”
The entire assembled board agreed.
I calm down a bit and have a think. Fuck your boardroom, I’m having a cigar.
“You need a licensed, certified, master blaster to go and sort that out. Do you happen to have one handy?” I asked, sweeter than clover honey.
“Ah, yes, you are…oh.”, was the collective realization.
“Yeah, I know. It’s me. I’m the only one that can sort this shit out. We can’t even wait until we find someone from the world to assist. We are sitting on a literal time bomb, gentlemen.” I reply.
They all agreed and were relieved I was going to take on the challenge.
What else could I do? That stuff lights off and we’re talking easily hundreds if not thousands of fatalities and countless injuries. Fuck that. Not on my watch.
I tells ya’ what. The fucking Karma Fairy better shower me with gifts and accolades, blowjobs and candy corn after all this.
In a metaphorical sense, of course.
“OK, Mr. Sanjay, you’re with me.” I say, “Now look, Herr Macs”, I address the collective board, “Before I had carte blanche. Now, if I even think we might need something, it appears. We’ll sort out our honoraria and bonuses for this after we get back.”
Everyone present agreed most hastily. Handshakes all around and apologies from the board cemented the issue.
“OK, Sanjay. I need a bus. At least 24-seater. With a driver than knows how, when, and where to stop. OK?” I ask.
“24, Rock?”, Sanjay asks, “You’re not thinking of including the recruits now, are you?”
“Yes I am, Mr. Sanjay.”, I replied sternly, “On the job training. Meet me at outbuilding #2 at 1300 as per plan. Order a bus and arrange the largest forklift that can manage beach sand, about 100 wooden pallets, plastic wrap, and sandbags. Lots and lots of sandbags. Have them stockpiled away from the tent in a muster area. OK. You got all that?”
“Yes, Rock”, he said, “I’ll be there in a couple of hours. It will only take a few phone calls.”
“Marvelous.”
Not even 1000 in the fucking morning and I’m facing life and death decisions once again. I dig an emergency flask out of my field vest. If this doesn’t qualify as an emergency, what the fuck does?
A tot or two later, I change into my PPEs, and light a cigar. I catch a tap-tap to the region of the tent. I need to reconnoiter the area and figure out what sort of dragon I have to slay and the best way of going about slaughtering the sumbitch.
I’m standing alone, about 250 meters from the tent of death.
I’m puzzling and puzzling; but I can’t allow for my puzzler to go sore. Not this early, anyway.
“OK, me ol’ mucker”, I sigh, “It’s me or thee. Pucker up, Buckwheat. Here I come.”
A blast suit like the ones bomb disposal dudes wear wouldn’t help in the least. All it would do is hold the mashed body parts together to make for easier disposal. I’m anywhere within a kilometer or so of this pile of Chinese counterfeit boom-makers and it decides to let go; I’m lunchmeat. That’s it. Alive one second; kerpow, splat, instantaneously zonked into component particles the next. That’s the long and short of it. No ‘thank you’s. No ‘good bye’s. Just existing here one minute and in an alternate dimension the next.
Doesn't that just take the biscuit? Funny old thing, life.
I trod onwards.
For a moment, nothing happened. Then, after a second or so, nothing continued to happen.
I was walking up to the tent, clearing a path for the forklift. No fucking way I’m schlepping nine tons of dodgy explosives out of here, over wet beach sand, by hand and hoof.
Sand. I’m with young Anakin on this one. I hate sand. I hate walking in dry sand, hiking in wet sand. It makes for a wonderful oil reservoir and I love its porosity and permeability at depth. But at the surface, forget it. Yow! Let me tell you about the time I was out in the Rub al-Khali desert. The great Sand Erg. Wind blowing a force 9 gale! Seif dunes 1,000 meters high…
Yeah. I know. I’m stalling.
I’m approaching the tent. Carefully. I pause to light a new cigar. You might think that daft, but it’s really not. None of the stuff inside is heat-sensitive; let me clarify. None of the stuff is going to go off if hit by errant ash or even a sustained flame. But sitting out in the 30C+ heat? OK, that makes it twitchier. Cigars do the opposite for me. Give me something to concentrate upon and it calms me down.
I need calm now. By the bucketful. Where’s a monsoon when you really need one?
OK, I made it. I’m at the tent. Got to hand it to the workers around here, they respect authority and don’t come anywhere near the tent. They also don’t apparently give a shit as there no crowd gathered filming me with their iPhones to post to You Tube© if the tent decides to go all detonic.
Good. I couldn’t yell anything at them they’d understand to clear out anyway.
I open the hole in the side of the tent and pause. I’m hit with a wave of hot air. And the heady redolence of onions, sewer gas, and dog farts.
Sorry, that’s just me. Weird midnight snack last night. Frozen durian. What a treat.
Anyways.
I smell kerosene. Old wood pulp, like musty magazines. And an undercurrent of almonds.
“Oh, treble fuck me,” I say to no one within 100 square kilometers.
Kerosene is sweaty C-4. Old wood pulp is dynamite. Almonds? My old friend, nitroglycerine.
Things, if possible, went from real to super-uber major-league holy-fuck real.
“OK”, I say, as I dig out my phone and begin to snap pictures at a frantic rate.
Luckily, all the ordnance was piled like-with-like. Blasting caps? All over here. C-4, all along this ‘wall’. Dynamite? All over here. Non-explosives? Right over here.
I was mentally running like a squadron of overclocked Crays, wondering what I need to do to sort out this little situation. I’m so deep in thought, someone would need to throw me a rope to get my attention.
Or, just tap me on the shoulder.
Once I returned from low earth orbit, I turn to see a little wisp of an Indian feller, who had to be at least 27 years Methuselah’s senior.
“What? THE? Actual? Fuck? Are? You? DOING? Here?” I screamed.
“A thousand pardons, Sahib.”, the ancient one said, “I saw you working alone. Salim wonders if you need some help? Salim is good helper. Salim will help you good.”
“Yes, Salim. Oh, hello by the way.”, I said, calming a bit, forcing myself to smile so I didn’t kill him on the spot, “I do need your help. I need you to go, very slowly, out of this tent and to where the flags begin. Stand there and allow access to no one. OK. We green?”
Salim smiles broadly revealing both teeth. I slowly usher him out and remind myself to order a few new pairs of boxers before the day is out.
Back to the problem at hand. There are some salvageable items here. But the most the C-4, all the dynamite and every sack of ANFO has to go. And by ‘go’, I mean be disposed of. How?
By blowing it up, how else?
An idea creeps into my skull. I puff and puff while it grows and finally, I’ve a plan of attack.
I close the tent and slowly walk away. I hand Salim 1000 rupees and tell him that no one, I don’t care if it was Mahatma Gandhi reincarnate, goes anywhere near that tent.
“You savvy?” I ask.
“Oh, Sahib! I savvy! Thank you! Salaam! I savvy!” he is beside himself with joy, 13 bucks, and a task.
I look at my watch. It’s just gone noon. Good. I need a sandwich, some fluid replacement, as I’ve probably literally sweated off 5 kilos in the last hour and a half, and some time to jot down my plans.
I catch a tap-tap, geez, these things are everywhere around here. They form an unsanctioned, but necessary, sort of intradepartmental transport system here. I tip a couple of hundred rupees for every trip. They see blaze orange and they have this Pavlovian reaction. I sometimes need to break up fist-fights over which driver arrived first.
“Commissary”, I say, sit down, let the tap-tap, which is really nothing more than a glorified golf cart, adjust to my Western bulk and away we zip.
Salim is waving to me as we depart.
I shudder to think if I hadn’t had a tot or two and was a bit jumpier from the morning’s caffeine. Here's to alcohol: the cause of, and solution to, all of life's problems.
At the commissary, I grab a tall iced, fruit cocktail juice; a slurry of mixed dragon fruit, kiwi, carambola, blood orange, green apple, watermelon, bitter melon, sweet melon, & bailan melon fruity essence. I’m incredibly thirsty and I need some calories, but not in bulk and not from onion bhajis, mutton kabobs, or something claiming to be grilled chicken on a stick.
The last thing I need today is a case of the trots or even sharp gas pains in the next few hours. I add about 5 fingers of Old Fornicator Vodka to the juice and sip it slowly as my biometric rhythms return from the ionosphere and back to more normal levels.
Remember, I’m EtOh-based. I need to control my various fluid levels very carefully.
The blasting muse is upon me. In less than 30 minutes, I have a plan. Both a written out procedure and a map of what needs to be done.
I finish off another tall, icy glass of potato and various fruit juices, venture outside feeling almost like I’ve once again regained the illusion of control of the situation and my life.
I fire up a heater and decide to walk the approximately 1100 meters to outbuilding #2. I’m thinking as I sashay along; figuring this and calculating that.
I round the corner and see Outbuilding #2 and a bus parked next to it.
The bus looks like a refugee from Sgt. Pepper’s Lonely Hearts Club Band. The movie and album.
I go into Outbuilding #2 and see about half the class has arrived, and they are all kitted out in their new, stiff, and scratchy PPEs.
I nod hello to all and see Sanjay over across the room.
“Mr. Sanjay”, I say, “Nice bus. What’s the story?”
“Only one I could find that was a 24 seater, not actively falling apart, and with an English speaking driver. Rock. Mr. Maha, owneoperator.” He replied.
“Mr. Maha”, I said, shaking his hand. “Love the bus. Some sort of passion project?”
Mr. Maha laughs. “I was city bus driver for 39 years. I retire and go nuts. I buy old bus and fix up mechanicals. Runs all like excellently. Looks like dung heap. I begin to paint and never quite knew when to stop.”
“I like it. Adds a sense of surrealism to the day, as if it really needs more.” I reply, “However, I do hope you know how to stop. I mean that sincerely. We have a literal bomb to defuse. Does that bother you?”
“No, Doctor”, he says, “Nothing much bothers me anymore. I know. You are here. You are to make safe. I feel safe that you’re here. Let us go to work.”
“Outstanding”. I say.
I tell him that a fat bonus will be his when this is all over if all goes to plan.
“Unnecessary.”, he replies, “Mr. Sanjay has already paid me.”
“Paid? Perhaps”, I reply, “You are going to get danger money whether you like it or not.”
“I guess I will like it, Doctor.” He smiles.
“Marvelous.”
I look at the clock, it’s 1256. Almost showtime.
1300 on the spot. I pick up the microphone and address the assembled 24.
“Gentlemen”, I say, “Very good. You all look like late October in the United States. Very festive.” as all are kitted out in their respective PPEs.
“We have a little matter to handle. One that has just cropped up and one you’re certainly not ready for, but I have no other choice. Does that bother anyone here?” I ask.
Head shakes and questions arise.
“OK, class”, I say, “For your first training exercise, we’re going to defuse a 9-ton bomb. Let’s go.”
The collective gasp drew my cigar smoke in another direction, right towards them.
“Doctor…Ah, Rock. Really?” one brave soul asked for the crowd.
“Yes”, I said, “seems your company officials got a ‘real deal’ on some dodgy Chinese explosives. They didn’t wait until they finished the storage bunker I had designed, so they simply set the stuff on the beach and covered it with a canvas tent.”
There were more gasps.
“Indeed”, I said, “We need to neutralize this threat. Sanjay is passing out copies of my plan and designs on just how to do this. Read them over and let me know what you think. You have 5 minutes. We’re out of here at 1330 on the nose.”
They read quickly, cogitated over the plans and as I had assumed, didn’t find any flaws within.
“OK”, I say after an inch of cigar had passed, “You follow my directions, directly and without question, there’s no reason you can’t come out of this alive and happy, free to pursue a life of religious fulfillment.”
There was a chuckle or two at that last line. ‘Airplane’ is such a classic movie.
“Now I know”, I continued, “That this is pretty scary shit. Especially for you guys, being tossed in the deep end like this. I know because I’m scared to death.”
“Oh, Doctor Rock”, one of my acolytes said, “We do not believe this is so.”
“I stay alive by being scared to death”, I replied. “You will learn this as well.”
Sanjay checks out everyone’s PPE and all appear in good order. They are happy to have such nice, new equipment.
And that’s a problem. People used to ragged and ratty shit with which to work will go to extraordinary lengths to not filthy-up brand new working gear. This is one little bugaboo I’m going to settle here and now.
“One thing, gentlemen”, I note, “You all have nice, clean, and new PPEs. You look great. You come back to Outbuilding #2 looking as pristine, you’re gone. Keeping clean is not a part of your training. You’re going to sweat and stink. You keep to clean and it tells me you’re goldbricking, that is, not doing your job.” I say as I surreptitiously unscrew the top of my travel mug, ‘accidentally’ trip and shower the front row with Greenland coffee, lukewarm.
“See?”, I saw, “They were totally protected. That’s what PPEs are all about. We green?”
“Somewhat brown, Rock”, a couple of the guys in the front row reply without a hint of irony.
“Outstanding.”
“Gentlemen, it is time. Take what you think you’ll need and leave the rest in your locker box. Brass tags to Sector 4. On the bus, we leave in 5 minutes.”
I move my brass marker to Zone 4, puff a blue cloud for all to see, and head out to the bus.
We’re loaded and headed to Sector 4 in less than 5 minutes.
“OK”, I say”, I’m going to break you up into groups of 4. Tags number 1 to 4, you’re group 1. 5-8, group 2, and so on. OK?”
All respond in the affirmative.
OK. Six groups of four, Sanjay and me to lead the pack. We roll up to just outside the exclusion zone. With a squeal of brakes, we grind to a halt.
“Outside”, I command, “Assemble in your groups next to the bus. Go!”.
Like a well-oiled team, they de-bus and stand together in 6 groups. Sanjay and I walk along, inspecting the troops.
“OK”, I say, “This may seem like a shit job, but group 4. Back on the bus. To the commissary. Water, juice, and whatever else you think we’ll need to stay hydrated out there. Don’t worry, we’re going on rotation once you get back. You’ll all get a chance to do the exciting stuff. Now, move it.”
I say something to Sanjay, he jots it down in his book, certain to remind me later.
“OK, let’s see. Group 1. Storage detail. Build the temporary in-ground storage locker like it’s shown in the plan. Get help and have them source the manpower and materials. It needs to be done in the next 2 hours. Go!”
There are some explosives that can be salvaged. I need a place to store them. I’ve scouted and laid out a spot away from prying eyes where they can build an 8x8x8 hole in the ground, line it with marine plywood, and store whatever we can salvage. A plywood roof over the thing, a couple of locks, and well, Robert’s your Mother’s Sister’s Husband.
Next, I send group 3 to build a road from the tent to an area on the beach sourced as Disposal Area #1. They will take flags and tape and run a road, of sorts, from the tent to the beach; cordoning it off so we can take the forklift and its loads of dodgy high explosives to the disposal area.
The other groups are doing needful and necessary things as well. I tell Sanjay to keep a lid on things, I’m going to bring the forklift, a few pallets, sandbags and such in for the first run.
I find the forklift, and it’s a huge old Hyster 52-ton truck.
It’ll do.
The keys are in, so I drop in and fire it up. It catches on the first twirl and I pick up a half-dozen wooden pallets, a bunch of sandbags, and a few huge rolls of plastic wrapping. It’s like driving a tank, but it has plenty of power and just a low gear range.
I drive it back to Sector 4 and almost rum over Salim. He was taking my previous orders very seriously, indeed.
“All cool, Salim”, I say over the roar of the forklift, “It’s just me.”
He waves and lets me pass. He’s serious as a heart attack about keeping people out.
I drive and realize that I can’t drive ‘gingerly’ in a conveyance such as this. I can drive deliberately and with forethought, but it rumbles and shudders the ground. Best to slide in, drop the load, and shut her down while I figure out what’s next.
I do so and drop the pallets, etc., just outside the flap of the tent. I back off a few feet, drop the forks, and shut the noisy machine down for the time being.
Sanjay appears. As does Crew #5. I motion them to come over, slowly and with forethought.
We’re all standing outside the tent flap. I raise an index finger, right, of course, to get their attention.
“Gentlemen, first lesson. What says these explosives have gone bad? Answer:” and I open the tent flap.
“Take a whiff. What do you smell?” I instruct.
“Old paper?” was one answer.
“Oil? Petrol? Something petrochemical?” was the next.
“Almonds?” Sanjay says.
“Highest marks. We’ve old C-4. It sweats and smells like kerosene. Old paper or pulp? Dynamite gone wet and bad. Almonds? Bitter, bitter almonds? Nitroglycerine. Yes, guys. We’ve got rogue nitro inside. Anyone want to quit? Now’s your chance.” I ask, being deadly serious.
One looks to another; then they all look to me…eyes wide…
To be continued…
submitted by Rocknocker to Rocknocker [link] [comments]

[Table] Asteroid Day AMA – We’re engineers and scientists working on a mission that could, one day, help save humankind from asteroid extinction. Ask us anything!

Source
There are several people answering: Paolo Martino is PM, Marco Micheli is MM, Heli Greus is HG, Detlef Koschny is DVK, and Aidan Cowley is AC.
Questions Answers
Can we really detect any asteroids in space with accuracy and do we have any real means of destroying it? Yes, we can detect new asteroids when they are still in space. Every night dozens of new asteroids are found, including a few that can come close to the Earth.
Regarding the second part of the question, the goal would be to deflect them more than destroy them, and it is technologically possible. The Hera/DART mission currently being developed by ESA and NASA will demonstrate exactly this capability.
MM
I always wanted to ask: what is worse for life on Earth - to be hit by a single coalesced asteroid chunk, or to be hit by a multiple smaller pieces of exploded asteroid, aka disrupted rubble pile scenario? DVK: This is difficult to answer. If the rubble is small (centimetres to meters) it is better to have lots of small ones – they’d create nice bright meteors. If the rubble pieces are tens of meters it doesn’t help.
Let’s say that hypothetically, an asteroid the size of Rhode Island is coming at us, it will be a direct hit - you’ve had the resources and funding you need, your plan is fully in place, everything you’ve wanted you got. The asteroid will hit in 10 years, what do you do? DVK: I had to look up how big Rhode Island is – a bit larger than the German Bundesland ‘Saarland’. Ok – this would correspond to an object about 60 km in diameter, right? That’s quite big – we would need a lot of rocket launches, this would be extremely difficult. I would pray. The good news is that we are quite convinced that we know all objects larger than just a few kilometers which come close to our planet. None of them is on a collision course, so we are safe.
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Why are you quite convinced that you know all object of that size? And what is your approach in finding new celestial bodies? DVK: There was a scientific study done over a few years (published in Icarus 2018, search for Granvik) where they modelled how many objects there are out there. They compared this to the observations we have with the telescopic surveys. This gives us the expected numbers shown here on our infographic: https://www.esa.int/ESA_Multimedia/Images/2018/06/Asteroid_danger_explained
There are additional studies to estimate the ‘completeness’ – and we think that we know everything above roughly a few km in size.
To find new objects, we use survey telescopes that scan the night sky every night. The two major ones are Catalina and Pan-STARRS, funded by NASA. ESA is developing the so-called Flyeye telescope to add to this effort https://www.esa.int/ESA_Multimedia/Images/2017/02/Flyeye_telescope.
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Thanks for the answer, that's really interesting! It's also funny that the fist Flyeye deployed is in Sicily, at less than 100km from me, I really had no idea DVK: Indeed, that's cool. Maybe you can go and visit it one day.
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What about Interstellar objects however, like Oumuamua? DVK: The two that we have seen - 'Oumuamua and comet Borisov - were much smaller than the Saarland (or Rhode Island ;-) - not sure about Borisov, but 'Oumuamua was a few hundred meters in size. So while they could indeed come as a complete surprise, they are so rare that I wouldn't worry.
Would the public be informed if an impending asteroid event were to happen? And, how would the extinction play out? Bunch of people crushed to death, knocked off our orbit, dust clouds forever? DVK: We do not keep things secret – all our info is at the web page http://neo.ssa.esa.int. The ‘risky’ objects are in the ‘risk page’. We also put info on really close approaches there. It would also be very difficult to keep things ‘under cover’ – there are many high-quality amateur astronomers out there that would notice.
In 2029 asteroid Apophis will fly really close to Earth, even closer than geostationary satellites. Can we use some of those satellites to observe the asteroid? Is it possible to launch very cheap cube sats to flyby Apophis in 2029? DVK: Yes an Apophis mission during the flyby in 2029 would be really nice. We even had a special session on that topic at the last Planetary Defense Conference in 2019, and indeed CubeSats were mentioned. This would be a nice university project – get me a close-up of the asteroid with the Earth in the background!
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So you’re saying it was discussed and shelved? In the conference we just presented ideas. To make them happen needs funding - in the case of ESA the support of our member countries. But having something presented at a conference is the first step. One of the results of the conference was a statement to space agencies to consider embarking on such a mission. See here: https://www.cosmos.esa.int/documents/336356/336472/PDC_2019_Summary_Report_FINAL_FINAL.pdf/341b9451-0ce8-f338-5d68-714a0aada29b?t=1569333739470
Go to the section 'resolutions'. This is now a statement that scientists can use to present to their funding agencies, demonstrating that it's not just their own idea.
Thanks for doing this AMA! Did we know the Chelyabinsk meteor in 2013 (the one which had some great videos on social media) was coming? Ig not, how comes? Also, as a little side one, have there been any fatalities from impact events in the past 20 years? Unfortunately, the Chelyabinsk object was not seen in advance, because it came from the direction of the Sun where ground-based telescopes cannot look.
No known fatalities from impacts have happened in the past 20 years, although the Chelyabinsk event did cause many injuries, fortunately mostly minor.
MM
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How often do impacts from that direction happen, compared to impacts from visible trajectories? In terms of fraction of the sky, the area that cannot be easily scanned from the ground is roughly a circle with a radius of 40°-50° around the current position of the Sun, corresponding to ~15% of the total sky. However, there is a slight enhancement of objects coming from that direction, therefore the fraction of objects that may be missed when heading towards us is a bit higher.
However, this applies only when detecting an asteroid in its "final plunge" towards the Earth. Larger asteroids can be spotted many orbits earlier, when they are farther away and visible in the night side of the sky. Their orbits can then be determined and their possible impacts predicted even years or decades in advance.
MM
There must be a trade-off when targeting asteroids as they get closer to Earth, is there a rule of thumb at what the best time is to reach them, in terms of launch time versus time to reach the asteroid and then distance from Earth? DVK: Take e.g. a ‘kinetic impactor’ mission, like what DART and Hera are testing. Since we only change the velocity of the asteroid slightly, we need to hit the object early enough so that the object has time to move away from it’s collision course. Finding out when it is possible to launch requires simulations done by our mission analysis team. They take the strength of the launcher into account, also the available fuel for course corrections, and other things. Normally each asteroid has its own best scenario.
Do you also look at protecting the moon from asteroids? Would an impact of a large enough scale potentially have major impacts on the earth? DVK: There are programmes that monitor the Moon and look for flashes from impacting small asteroids (or meteoroids) - https://neliota.astro.noa.g or the Spanish MIDAS project. We use the data to improve our knowledge about these objects. These programmes just look at what is happening now.
For now we would not do anything if we predicted a lunar impact. I guess this will change once we have a lunar base in place.
Why aren't there an international organisation comprised of countries focused on the asteroid defence? Imagine like the organisation with multi-billion $ budget and program of action on funding new telescopes, asteroid exploration mission, plans for detection of potentially dangerous NEA, protocols on action after the detection - all international, with heads of states discussing these problems? DVK: There are international entities in place, mandated by the UN: The International Asteroid Warning Network (http://www.iawn.net) and the Space Mission Planning Advisory Group (http://www.smpag.net). These groups advise the United Nations. That is exactly where we come up with plans and protocols on action. But: They don’t have budget – that needs to come from elsewhere. I am expecting that if we have a real threat, we would get the budget. Right now, we don’t have a multi-billion budget.
the below is a reply to someone else's answer
There is no actual risk of any sizable asteroids hitting earth in the foreseeable future. Any preparation for it would just be a waste of money. DVK: Indeed, as mentioned earlier, we do not expect a large object to hit is in the near future. We are mainly worried about those in the size range of 20 m to 40 m, which happen on average every few tens of years to hundreds of years. And where we only know a percent of them or even less.
President Obama wanted to send a crewed spacecraft to an asteroid - in your opinion is this something that should still be done in the future, would there be any usefulness in having a human being walk/float on an asteroid's surface? DVK: It would definitely be cool. I would maybe even volunteer to go. Our current missions to asteroids are all robotic, the main reason is that it is much cheaper (but still expensive) to get the same science. But humans will expand further into space, I am sure. If we want to test human exploration activities, doing this at an asteroid would be easier than landing on a planet.
this is another reply Yes, but I am slightly biased by the fact that I work at the European astronaut centre ;) There exist many similarities to what we currently do for EVA (extra vehicular activities) operations on the International Space Station versus how we would 'float' around an asteroid. Slightly biased again, but using such a mission to test exploration technologies would definitely still have value. Thanks Obama! - AC
I've heard that some asteroids contains large amounts of iron. Is there a possibility that we might have "space mines" in the far away future, if our own supply if iron runs out? Yes, this is a topic in the field known as space mining, part of what we call Space Resources. In fact, learning how we can process material we might find on asteroids or other planetary bodies is increasingly important, as it opens up the opportunities for sustainable exploration and commercialization. Its a technology we need to master, and asteroids can be a great target for testing how we can create space mines :) - AC
By how much is DART expected to deflect Didymos? Do we have any indication of the largest size of an asteroid we could potentially deflect? PM: Didymos is a binary asteroid, consisting of a main asteroid Didymos A (~700m) and a smaller asteroid Didymos B (~150m) orbiting around A with a ~12 hours period. DART is expected to impact Didymos B and change its orbital period w.r.t. Didymos A of ~1%. (8 mins)
The size of Didymos B is the most representative of a potential threat to Earth (the highest combination of probability and consequence of impacts), meaning smaller asteroids hit the Earth more often but have less severe consequences, larger asteroids can have catastrophic consequences but their probability of hitting the earth is very very low.
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Why is there less probability of larger asteroids hitting earth? DVK: There are less large objects out there. The smaller they are, the more there are.
the below is a reply to the original answer
Is there any chance that your experiment will backfire and send the asteroid towards earth? PM: Not at all, or we would not do that :) Actually Dimorphos (the Didymos "moon") will not even leave its orbit around Didymos. It will just slightly change its speed.
I'm sure you've been asked this many times but how realistic is the plot of Armageddon? How likely is it that our fate as a species will rely on (either) Bruce Willis / deep sea oil drillers? Taking into consideration that Bruce Willis is now 65 and by the time HERA is launched he will be 69, I do not think that we can rely on him this time (although I liked the movie).
HERA will investigate what method we could use to deflect asteroid and maybe the results will show that we indeed need to call the deep sea oil drillers.
HG
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So then would it be easier to train oil drillers to become astronauts, or to train astronauts to be oil drillers? I do not know which one would be easier since I have no training/experience of deep see oil drilling nor becoming an astronaut, but as long as the ones that would go to asteroid have the sufficient skills and training (even Bruce Willis), I would be happy.
HG
If budget was no object, which asteroid would you most like to send a mission to? Nice question! For me, I'd be looking at an asteroid we know something about, since I would be interested in using it for testing how we could extract resources from it. So for me, I would choose Itokawa (https://en.wikipedia.org/wiki/25143_Itokawa), which was visited by Hayabusa spacecraft. So we already have some solid prospecting carried out for this 'roid! - AC
this is another reply Not sure if it counts as an asteroid, but Detlef and myself would probably choose ʻOumuamua, the first discovered interstellar object.
MM
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Do we even have the capability to catch up to something like that screaming through our solar system? That thing has to have a heck of a velocity to just barrel almost straight through like that. DVK: Correct, that would be a real challenge. We are preparing for a mission called 'Comet Interceptor' that is meant to fly to an interstellar object or at least a fresh comet - but it will not catch up with it, it will only perform a short flyby.
https://www.esa.int/Science_Exploration/Space_Science/ESA_s_new_mission_to_intercept_a_comet
After proving to be able to land on one, could an asteroid serve as a viable means to transport goods and or humans throughout the solar system when the orbit of said asteroid proves beneficial. While it is probably quite problematic to land the payload, it could save fuel or am I mistaken? Neat idea! Wonder if anyone has done the maths on the amount of fuel you would need/save vs certain targets. - AC
PM: To further complement, the saving is quite marginal indeed because in order to land (softly) on the asteroid you actually need to get into the very same orbit of that asteroid . At that point your orbit remains the same whether you are on the asteroid or not..
can the current anti-ballistic missiles systems intercept a terminal phase earth strike asteroid? or it is better to know beforehand and launch an impacting vehicle into space? DVK: While I do see presentations on nuclear explosions to deflect asteroids at our professional meetings, I have not seen anybody yet studying how we could use existing missile systems. So it's hard to judge whether existing missiles would do the job. But in general, it is better to know as early as possible about a possible impact and deflect it as early as possible. This will minimize the needed effort.
How much are we prepared against asteroid impacts at this moment? DVK: 42… :-) Seriously – I am not sure how to quantify ‘preparedness’. We have international working groups in place, mentioned earlier (search for IAWN, SMPAG). We have a Planetary Defence Office at ESA, a Planetary Defense Office at NASA (who spots the difference?), search the sky for asteroids, build space missions… Still we could be doing more. More telescopes to find the object, a space-based telescope to discover those that come from the direction of the Sun. Different test missions would be useful, … So there is always more we could do.
Have you got any data on the NEO coverage? Is there estimations on the percentage of NEOs we have detected and are tracking? How can we improve the coverage? How many times have asteroids been able to enter earths atmosphere without being detected beforehand? Here’s our recently updated infographics with the fraction of undiscovered NEOs for each size range: https://www.esa.int/ESA_Multimedia/Images/2018/06/Asteroid_danger_explained
As expected, we are now nearly complete for the large ones, while many of the smaller ones are still unknown.
In order to improve coverage, we need both to continue the current approach, centered on ground-based telescopes, and probably also launch dedicated telescopes to space, to look at the fraction of the sky that cannot be easily observed from the ground (e.g., towards the Sun).
Regarding the last part of your question, small asteroids enter the Earth atmosphere very often (the infographics above gives you some numbers), while larger ones are much rarer.
In the recent past, the largest one to enter our atmosphere was about 20 meters in diameter, and it caused the Chelyabinsk event in 2013. It could not be detected in advance because it came from the direction of the Sun.
We have however detected a few small ones before impact. The first happened in 2008, when a ~4-meter asteroid was found to be on a collision course less than a day before impact, it was predicted to fall in Northern Sudan, and then actually observed falling precisely where (and when) expected.
MM
this is another reply >After
DVK: And to add what MM said - Check out http://neo.ssa.esa.int. There is a ‘discovery statistics’ section which provides some of the info you asked about. NASA is providing similar information here https://cneos.jpl.nasa.gov/stats/. To see the sky which is currently covered by the survey telescopes, you need to service of the Minor Planet Center which we all work together with: http://www.minorplanetcenter.org, ‘observers’, ‘sky coverage’. That is a tool we use to plan where we look with our telescopes, so it is a more technical page.
Are there any automatic systems for checking large numbers of asteroids orbits, to see if the asteroid's orbit is coming dangerously close to Earth, or is it done by people individually for every asteroid? I ask it because LSST Rubin is coming online soon and you know it will discover a lot of new asteroids. Yes, such systems exist, and monitor all known and newly discovered asteroids in order to predict possible future impacts.
The end result of the process is what we call "risk list": http://neo.ssa.esa.int/risk-page
It is automatically updated every day once new observational data is processed.
MM
What are your favourite sci-fi series? DVK: My favorites are ‘The Expanse’, I also liked watching ‘Salvation’. For the first one I even got my family to give me a new subscription to a known internet streaming service so that I can see the latest episodes. I also loved ‘The Jetsons’ and ‘The Flintstones’ as a kid. Not sure the last one counts as sci-fi though. My long-time favorite was ‘Dark Star’.
this is another reply Big fan of The Expanse at the moment. Nice, hard sci-fi that has a good impression of being grounded in reality - AC
this is another reply When I was a kid I liked The Jetsons, when growing up Star Trek, Star wars and I also used to watch with my sister the 'V'.
HG
When determining the potential threat of a NEA, is the mass of an object a bigger factor or size? I'm asking because I'm curious if a small but massive object (say, with the density of Psyche) could survive atmospheric entry better than a comparatively larger but less massive object. The mass is indeed what really matters, since it’s directly related with the impact energy.
And as you said composition also matters, a metal object would survive atmospheric entry better, not just because it’s heavier, but also because of its internal strength.
MM
What are your thoughts on asteroid mining as portrayed in sci-fi movies? Is it feasible? If so would governments or private space programs be the first to do so?What type of minerals can be found on asteroids that would merit the costs of extraction? Certainly there is valuable stuff you can find on asteroids. For example, the likely easiest material you can harvest from an asteroid would be volatiles such as H2O. Then you have industrial metals, things like Iron, Nickel, and Platinum group metals. Going further, you can break apart many of the oxide minerals you would find to get oxygen (getting you closer to producing rocket fuel in-situ!). Its feasible, but still needs alot of testing both here on Earth and eventually needs to be tested on a target. It may be that governments, via agencies like ESA or NASA, may do it first, to prove the principles somewhat, but I know many commercial entities are also aggresively working towards space mining. To show you that its definitely possible, I'd like to plug the work of colleagues who have processed lunar regolith (which is similar to what you may find on asteroids) to extract both oxygen and metals. Check it out here: http://www.esa.int/ESA_Multimedia/Images/2019/10/Oxygen_and_metal_from_lunar_regolith
AC
Will 2020's climax be a really big rock? DVK: Let's hope not...
Considering NASA, ESA, IAU etc. is working hard to track Earth-grazing asteroids, how come the Chelyabinsk object that airburst over Russia in 2013 came as a total surprise? The Chelyabinsk object came from the direction of the Sun, where unfortunately ground-based telescopes cannot look at. Therefore, it would not have been possible to discover it in advance with current telescopes. Dedicated space telescopes are needed to detect objects coming from this direction in advance.
MM
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Is this to say that it was within specific solid angles for the entire time that we could have observed it given its size and speed? Yes, precisely that. We got unlucky in this case.
MM
Have any of you read Lucifer's Hammer by Larry Niven? In your opinion, how realistic is his depiction of an asteroid strike on Earth? DVK: I have – but really long ago, so I don’t remember the details. But I do remember that I really liked the book, and I remember I always wanted to have a Hot Fudge Sundae when reading it.
I was thinking about the asteroid threat as a teen and came up with this ideas (Hint: they are not equally serious, the level of craziness goes up real quick). Could you please comment on their feasibility? 1. Attaching a rocket engine to an asteroid to make it gradually change trajectory, do that long in advance and it will miss Earth by thousands of km 2. Transporting acid onto asteroid (which are mainly metal), attaching a dome-shaped reaction chamber to it, using heat and pressure to then carry out the chemical reaction to disintegrate asteroids 3. This one is even more terrible than a previous one and totally Dan Brown inspired — transporting antimatter on asteroid, impacting and causing annihilation. Thank you for this AMA and your time! DVK: Well the first one is not so crazy, I have seen it presented... the difficulty is that all asteroids are rotating in one way or another. So if you continuously fire the engine it would not really help. You'd need to switch the engine on and off. Very complex. And landing on an asteroid is challenging too. Just using the 'kinetic impactor' which we will test with DART/Hera (described elsewhere in this chat) is simpler. Another seriously proposed concept is to put a spacecraft next to an asteroid and use an ion engine (like we have on our Mercury mission BepiColombo) to 'push' the asteroid away.
As for 2 and 3 I think I will not live to see that happening ;-)
What is the process to determine the orbit of a newly discovered asteroid? The process is mathematically quite complex, but here's a short summary.
Everything starts with observations, in particular with measurements of the position of an asteroid in the sky, what we call "astrometry". Discovery telescopes extract this information from their discovery images, and make it available to everybody.
These datapoints are then used to calculate possible trajectories ("orbits") that pass through them. At first, with very few points, many orbits will be possible.
Using these orbits we can extrapolate where the asteroid will be located during the following nights, use a telescope to observe that part of the sky, and locate the object again.
From these new observations we can extract new "astrometry", add it to the orbit determination, and see that now only some of the possible orbits will be compatible with the new data. As a result, we now know the trajectory better than before, because a few of the possible orbits are not confirmed by the new data.
The cycle can then continue, with new predictions, new observations, and a more accurate determination of the object's orbit, until it can be determined with an extremely high level of accuracy.
MM
What are some asteroids that are on your "watchlist"? We have exactly that list on our web portal: http://neo.ssa.esa.int/risk-page
It's called "risk list", and it includes all known asteroids for which we cannot exclude a possible impact over the next century. It is updated every day to include newly discovered asteroids, and remove those that have been excluded as possible impactors thanks to new observations.
MM
the below is a reply to the above
That's quite a list!! Do you guys ever feel stressed or afraid when you have to add another dangerous candidate (and by dangerous I mean those above 200m) is added to this Risk List? Yes, when new dangerous ones are added it's important that we immediately do our best to gather more data on them, observing them with telescopes in order to get the information we need to improve our knowledge of their orbit.
And then the satisfaction of getting the data needed to remove one from the list is even greater!
MM
What inspired you to go into this field of study? I was fascinated by astronomy in general since I was a kid, but the actual "trigger" that sparked my interest in NEOs was a wonderful summer course on asteroids organized by a local amateur astronomers association. I immediately decided that I would do my best to turn this passion into my job, and I'm so happy to have been able to make that dream come true.
MM
this is another reply DVK: I started observing meteors when I was 14, just by going outside and looking at the night sky. Since then, small bodies in the solar system were always my passion.
As a layperson, I still think using nuclear weapons against asteroids is the coolest method despite better methods generally being available. Do you still consider the nuclear option the cool option, or has your expertise in the field combined with the real-life impracticalities made it into a laughable/silly/cliche option? DVK: We indeed still study the nuclear option. There are legal aspects though, the ‘outer space treaty’ forbids nuclear explosions in space. But for a large object or one we discover very late it could be useful. That’s why we have to focus on discovering all the objects out there as early as possible – then we have time enough to use more conventional deflection methods, like the kinetic impactor (the DART/Hera scenario).
It seems like doing this well would require international cooperation, particularly with Russia. Have you ever reached out to Russia in your work? Do you have a counterpart organization there that has a similar mission? DVK: Indeed international cooperation is important - asteroids don't know about our borders! We work with a Russian team to perform follow-up observations of recently discovered NEOs. Russia is also involved in the UN-endorsed working groups that we have, IAWN and SMPAG (explained in another answer).
how much can experts tell from a video of a fireball or meteor? Can you work out what it's made of and where it came from? https://www.reddit.com/space/comments/hdf3xe/footage_of_a_meteor_at_barrow_island_australia/?utm_source=share&utm_medium=web2x If multiple videos or pictures, taken from different locations, are available, then it's possible to reconstruct the trajectory, and extrapolate where the object came from.
Regarding the composition, it's a bit more difficult if nothing survives to the ground, but some information can be obtained indirectly from the fireball's color, or its fragmentation behavior. If a spectral analysis of the light can be made, it's then possible to infer the chemical composition in much greater detail.
MM
I've always wanted to know what the best meteorite buying site is and what their average price is?? DVK: Serious dealers will be registered with the 'International Meteorite Collectors Association (IMCA)' - https://www.imca.cc/. They should provide a 'certificate of authenticity' where it says that they are member there. If you are in doubt, you can contact the association and check. Normally there are rough prices for different meteorite types per gram. Rare meteorites will of course be much more expensive than more common ones. Check the IMCA web page to find a dealer close to you.
Just read through Aidans link to the basaltic rock being used as a printing material for lunar habitation. There is a company called Roxul that does stone woven insulation that may be able to shed some light on the research they have done to minimize their similarity to asbestos as potentially carcinogenic materials deemed safe for use in commercial and residential applications. As the interior surfaces will essentially be 3D printed lunar regolith what are the current plans to coat or dampen the affinity for the structure to essentially be death traps for respiratory illness? At least initially, many of these 3d printed regolith structures would not be facing into pressurised sections, but would rather be elements placed outside and around our pressure vessels. Such structures would be things like radiation shields, landing pads or roadways, etc. In the future, if we move towards forming hermetically sealed structures, then your point is a good one. Looking into terrestrial solutions to this problem would be a great start! - AC
What kind of career path does it take to work in the asteroid hunting field? It's probably different for each of us, but here's a short summary of my own path.
I became interested in asteroids, and near-Earth objects in particular, thanks to a wonderful summer course organized by a local amateur astronomers association. Amateur astronomers play a great role in introducing people, and young kids in particular, to these topics.
Then I took physics as my undergrad degree (in Italy), followed by a Ph.D. in astronomy in the US (Hawaii in particular, a great place for astronomers thanks to the exceptional telescopes hosted there).
After finishing the Ph.D. I started my current job at ESA's NEO Coordination Centre, which allowed me to realize my dream of working in this field.
MM
this is another reply DVK: Almost all of us have a Master's degree either in aerospace engineering, mathematics, physics/astronomy/planetary science, or computer science. Some of us - as MM - have a Ph.D. too. But that's not really a requirement. This is true for our team at ESA, but also for other teams in other countries.
What is the likelihood of an asteroid hitting the Earth In the next 200 years? It depends on the size, large ones are rare, while small ones are much more common. You can check this infographics to get the numbers for each size class: https://www.esa.int/ESA_Multimedia/Images/2018/06/Asteroid_danger_explained
MM
Have you played the Earth Defence Force games and if you have, which one is your favourite? No I have not played the Earth Defence Force games, but I just looked it up and I think I would liked it. Which one would you recommend?
HG
How close is too close to earth? Space is a SUPER vast void so is 1,000,000 miles close, 10,000,000? And if an asteroid is big enough can it throw earth off its orbit? DVK: Too close for my taste is when we compute an impact probability > 0 for the object. That means the flyby distance is zero :-) Those are the objects on our risk page http://neo.ssa.esa.int/risk-page.
If an object can alter the orbit of another one, we would call it planet. So unless we have a rogue planet coming from another solar system (verrry unlikely) we are safe from that.
How can I join you when I'm older? DVK: Somebody was asking about our career paths... Study aerospace engineering or math or physics or computer science, get a Masters. Possibly a Ph.D. Then apply for my position when I retire. Check here for how to apply at ESA: https://www.esa.int/About_Us/Careers_at_ESA/Frequently_asked_questions2#HR1
How much is too much? DVK: 42 again
Are you aware of any asteroids that are theoretically within our reach, or will be within our reach at some point, that are carrying a large quantity of shungite? If you're not aware, shungite is like a 2 billion year old like, rock stone that protects against frequencies and unwanted frequencies that may be traveling in the air. I bought a whole bunch of the stuff. Put them around the la casa. Little pyramids, stuff like that. DVK: If I remember my geology properly, Shungite forms in water sedimental deposits. This requires liquid water, i.e. a larger planet. So I don't think there is a high chance to see that on asteroids.
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MAME 0.220

[ Removed by reddit in response to a copyright notice. ]
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[Megathread] XMG FUSION 15 (with Intel)


On September 6 at IFA, press released their first reports about our collaboration project with Intel: XMG FUSION 15.
Community Links:

Press Links:

Video Links:

The following key facts have already been revealed:
Prices and availability will be announced on September 17. → Countdown to xmg.gg
Teaser Trailer on YouTube: XMG FUSION 15 Laptop | A Design Collaboration with Intel
We look forward to your questions and your feedback!

XMG FUSION 15 - FREQUENTLY ASKED QUESTIONS (FAQ)

This FAQ represents Q&A's over the last few days here. Fellow redditor u/iterateandgit was so kind to help me putting this document together. Big shout out to him please! The FAQ will be further extended over the coming days and weeks. Please keep the questions coming!

Sales, Shipping, Warranty


Q: Are you going to sell this on Amazon in the EU?
A: We are working on getting the product up and running on Amazon. But our own BTO shop at www.bestware.com will always be our primary sales channel and will be the only one where you can customize and configure memory, storage, OS, extend your warranty and pick other options.

Q: Do you offer student discounts or other sales compaigns like black friday?
A: In general, we don't offer student discounts. Sales campaigns are planned just in time, depending on stock level and cannot be announced early. If you want to keep up to date about sales campaigns, please subscribe to our newsletter.

Q: Do you ship to the UK? Can I pay in GBP?
A: We ship to the UK - the pricing will be in EUR, so your bank will do the conversion. Warranty services will be available from UK, shipping to Germany. Currently, in the single markets, these resturn shipments are free for the end-user. In the worst case there might be additional customs fees for shipping.

Q: What warranty options do you offer?
A: All our laptops come with 2 year warranty. Warranty repairs in the first 6 months are promised to be done within 48 hours (+shipping). Both the "instant repair" service and the warranty itself can be extended to up to 3 years.

Q: Do you sell outside of Europe?
A: We are able to ship anywhere, but warranty for customers outside the region would always involve additional customs cost and paperwork for sending the laptop back to Germany in the rare event of an RMA. There is currently no agreement to let other Local OEMs (like Eluktronics in the US) carry the warranty for XMG customers and vice-versa. Some parts are customized (in our case the LCD lid and the keyboard) and it won't be easy to agree on how to share handling fees etc. - so I wouldn't expect a global warranty anytime soon.


Hardware, Specs, Thermals


Q: What is the difference between XMG FUSION 15 and other laptops based on Intel's reference design?
A: The hardware of the barebone will be identical. Other Local OEMs might use different parts for RAM and SSDs. Our branding and service/warranty options might be different. We apply our own set of performance profiles in the Control Center. This will rebalance the differentiation between Silent, Balanced and Enthusiast modes.

Q: What is the TGP of the NVIDIA RTX 2070 Max-Q?
A: Officially, it is 80W in Balanced profile and 90W in Enthusiast profile. You can toggle between these modes in real-time with a dedicated mode switch button. Inofficially, the TGP can go up to 115W in Enthusiast profile thanks to the Overboost mechanic, working in the background. However, those 115W may only be sustained until the system has reached thermal saturation, i.e. when the GPU is approaching the GPU Temperature Target of 75°C.

Q: Can I upgrade the storage and memory after I buy?
A: On storage: The laptop has two m.2 PCI-Express SSD slots. This will give you currently up to 4 TB of SSD storage. There is no 2.5" HDD slot available. Instead, the battery is enlarged to 93.48Wh. You can see pictures of the interior layouts here, here and here.
On memory: the laptop has two SO-DIMM DDR4 memory sockets. You can chose during BTO configuration, if you want to occupy both of them when you order the product. We recommend running the laptop in Dual Channel for high-performance usage.

Q: How easy is to upgrade and repair this laptop?
A: Here are the key facts:
We would give this a solid 8 out of 10 which is pretty high for such a thin&light design. The 2 remaining points are substracted for BGA CPU and GPU, which is unfortunately unavoidable in such a thin design.

Q: Does it support Windows Hello?
A: A Fingerprint-Reader is not available, but the HD webcam comes with Infrared and supports Windows Hello.

Q: Can I get a smaller, lighter charger for this laptop?
A: XMG FUSION 15 requires a 230W power adaptor to provide full performance. If you max out CPU and GPU with furmark and prime, the 230W adapter will be fully utilized.
There are currently two compatible 230W adapters. They have different dimensions but similar weight. Please refer to this comparison table:
XMG FUSION 15 Power Supply Comparsion Table (Google Drive)
Includes shop links. Will be updated with precise weight numbers in the next few days. I also included 120W, 150W and 180W in this table. They all share the same plug (5.5/2.5,, diameter, 12.5mm length). But 120W and 150W are only rated for 19V but the laptop expect 19.5V. Usually this will be compensated by tolerance but we haven't tested how a system would behave under long-term usage with such an adaptor.
In theory, 120W to 180W are enough for charing the laptop and for browsing/web/media. Even a full CPU stress test could easily be handled. But as soon as you use CPU and GPU together, you'll run into the bottleneck and your performance will be reduced.
Comparison pictures:
These 5 pictures show only the relevant 230W chargers.
Again, the weight is about the same.

Q: Is it possible to boot and run the laptop while the lid is kept closed?
A: Closing the lid under load is not recommended because it will limit the airflow and have a bad effect on keyboard and screen. The laptop likes to take air in from the keycaps. With lid closed, the performance might be limited due to reaching temp targets earlier.

Q: Can I get the laptop without the XMG logo? I will be using it in public presentations and I would not like any brand names visible.
A: We cannot ship without XMG logo, but you can use a dbrand skins to cover our logo. We have not yet decided if we want to invest into integrating XMG FUSION 15 into the dbrand shop. But you can already buy 100% compatible skins by using the page of the Eluktronics MAG-15 at dbrand. The chassis dimensions are exactly the same. Please be aware: you have to manually select the option "No Logo Cutout" if you want to buy these skins for your XMG FUSION 15. According to dbrand, there will be most likely no import fees when ordering from the EU as long as the order is below 100€. Check this thread for details.

Q: Will you offer thermal paste upgrades like Thermal Grizzly Kryonaut or Liquid Metal?
A: Our ODMs are using silicon-based, high-performance thermal compund from international manufacturers like Shin-Etsu (Japan) and M.G. (USA). Intel is using MG-860 in this reference design.
These products are used in the industrial sector, so they have no publicly known brand name. Nevertheless, their high thermal conductivity and guaranteed durability provide optimal and long-lasting cooling of your high-performance laptop. The thermal compounds are applied and sealed automatically by the vendor of the thermal components. They are applied in a highly controlled, standardized manner and provide the best balance of thermal performance, production tolerance and product lifetime.
We are considering offering an upgrade to Thermal Grizzly Kryonaut due to popular demand. Will keep you posted on that.

Q: Could you please provide an estimate for how much regular usage (~10 browser tabs + some IDE) battery backup would this have? Will there be any way to trade-off battery backup with performance?
A: Battery life vs. peak performance can be traded off by using the "Silent" performance profile. You can switch between profiles using a dedicated button on the machine. Your scenario (10 tabs + some IDE) sounds like mostly reading and writing. I would estimate to get at least 7 hours of solid battery life in such a scenario, maybe more. We have achieved 8 hours in 1080p Youtube streaming on WiFi with 50% screen brightness. Adblock and NoScript helps to keep your idle browser tabs in check.


I/O Ports, Peripherals


Q: Why are there not more USB-A 3.1 Gen2 or even USB 3.2 Gen2x2 ports?
A: USB-A 3.1 Gen1 is basically the same as USB 3.0. There aren't a lot of USB-A devices that support more than USB 3.0 speed. Faster devices typically use USB-C connectors and can be used on Thunderbolt 3, which is down-compatible to USB-C 3.1 Gen2. One of the USB-A ports actually supports Gen2 speed.
For the following remarks, please keep in mind that I am not an Intel rep, so everything is based on our own experience.
The mainboard design and the I/O port decisions have been made by Intel. Feedback and requests from LOEM customers have been taken into consideration. We would assume that USB 3.2. Gen2x2 (20 Gbit/s) was not considered to be important enough to safe space for 3rd party IC (integrated circuits) on the motherboard. Right now, all the USB ports and Thunderbolts are supplied by Intel's own IC, so they have full control over the hardware, firmware and driver stack and over power saving and performance control. The more IC you add, the higher your Idle power consumption will be, plus adding potential compatibility or speed issues as it often happens with 1st generation 3rd party USB implementations. I very well remember from my own experience the support stories during the first years of USB 3.0, before it was supported in the Intel chipset. On the one hand, Intel is aiming high in terms of performance and convenience, on the other hand: support and reliability still seem to be Intel's goal #1. Thus they seem to play it safe where they deem it to be reasonable.
Intel is gearing up for USB 4.0 and next-gen Thunderbolt. USB 3.2 2x2 is probably treated as little more than a roadmap accident. Peripheral vendors might see it the same way.

Q: Do you support charging over USB-C/Thunderbolt? Does it support docking stations?
A: The Thunderbolt 3 port in Intel's reference design does not support charging. As you probably know, the 100W limit would not be enough to power the whole system and it would make the mainboard more complex to combine two different ways of charging. Intel consciously opted against it and will probably do so again on future high-end gaming/studio models.
The USB-C/Thunderbolt port supports Dual-Link DisplayPort signals, directly connected to the NVIDIA Graphics. This makes proper docking station usage very convenient. The user still needs to connect the external power adaptor. Both ports (Thunderbolt and DC-in) are in the back of the laptop, making the whole setup appear very neat on the desk.

Q: How many PCIe lanes does the Thunderbolt 3 provide? Are they connected to CPU or Chipset?
A: XMG FUSION 15 supports Thunderbolt 3 with 4 lanes of PCIe 3.0. The lanes come from the chipset because all of the CPU lanes (x16) are fully occupied by the dedicated NVIDIA graphics. We are not aware of any side-effects of running Thunderbolt from the chipset. It is common practice for high-end laptops with high-end graphics. The Thunderbolt solution is of course fully validated and certified by Intel's Thunderbolt labs.

Q: Does it have a standby USB to power USB devices without turning on the laptop?
A: Yes, the USB-A port on the left side supports this feature.


LCD Screen


Q: Which LCD panel is being used? Are there plans for 1440p or 4K panels in the laptop? How about PWM flickering?
A: The panel is BOE NV156FHM-N4G. It is currently not known if the panel will change in later batches. This depends on logistics and stock. At any rate, the panel key specs will remain the same. There are currently no plans to offer resolutions above FHD in the current generation of this laptop.
There are very wide ranges on reports of Backlight Brightness PWM control on this panel in different laptops. Ranging from 200Hz to 1000Hz to no PWM at all - all on the same panel model number. Intel informs us that there are many factors (e.g. freq., display driver, BIOS settings implementation, type of dimmers & compatibility with the driver etc.) that impacts the quality of panel dimming performance. To Intel's knowledge, no kind of flickering has been reported during the validation process. Furthermore, first hands-on data from Notebookcheck indicates that no PWM occurs on this panel. With a DSLR test (multiple burst shots at 1/4000s exposure time) I can confirm that there is not a single frame of brightness dipping or black screen, not even at minimum LCD brightness. Hence, we can confirm: BOE NV156FHM-N4G in XMG FUSION 15 (with Intel) does not use PWM for backlight control.

Q: Some BTO shops, for an additional fee, manually pick out display panels with the least back-light bleed. Do you offer that? Even better, do you do that without the extra fee?
A: Intel has validated this design to avoid backlight bleed as much as possible. Currently no plans to do further binning. All dozens of MP samples we have seen so far have been exceptionally good.

Q: I'm coming from a 13" MacBook with Retina display. How am I going to fare with this 15.6" FHD screen in content creation?
A: If you got used to editing high-res visual content (photography, artwork) on your 13inch retina, things will change. On the one hand, your canvas will be larger and more convenient and ergonomic to work with. On the other hand, you will find yourself zooming in more often in order to make out fine-detail. Assuming that you have sharp 20:20 vision.
As it is, the screen resolution and specs are not planned to change within the lifetime of this product. The first realistic time-window for a refresh would be whenever Intel is releasing the next "H" series CPU generation. But even then, an upgrade on resolution will not be guaranteed.
Comparison:
Laptop Resolution Pixel per inch dot pitch
13.3" MacBook Pro Retina (late 2013) 2560x1600 226.98 PPI 0.1119mm
15.6" XMG FUSION 15 (late 2019) 1920x1080 141.21 PPI 0.1799mm
To compare: 141.21 is ~62% from 226.98. This represents the the metric difference in pixel density and peak sharpness between these two models.
If you know the diagonal size and resolution of your screen, you can make this comparison yourself with the DPI/PPI calculator.


Keyboard, Backlight, Switches, Layout


Q: What can you tell us about the mechanical keyboard of XMG FUSION 15?
A: The keyboard has already been reviewed in our XMG NEO series as being more crisp than typical membrane keyboards. Most reviewers attested it a very good score, both for gaming and for writing long texts.
The keyboard backlight can be configured per-key. Default mode is all white.
Keyboard Switch Specs:
Having no frame around the keycaps actually helps the thermals. The fans can pull in additional air from the top. This improves airflow and helps to keep the keyboard temperature at low levels during gaming. It also prevents long-term RMA issues on the keyboard. This specific keyboard switch is already in its 3rd generation and very mature by now.

Q: Is it possible to dampen the mechanical keyboard with o-rings?
A: The switch design does not lend itself to further dampening. The switch mechanic is too complex and has more moving parts than cherry. The 2mm travel distance also plays a role in not allowing more dampening.
For reference, please use this video (Youtube). We compared XMG NEO with another membrane-type keyboard. XMG NEO and FUSION share the same keyboard mechanics with the silent tactile switch and the same sound profile.

Q: Do you have LED keyboard backlight on the secondary key function, like Fn key icons?
A: Please have a look at this picture.
Btw, my working sample has blank keycaps. I took the 3 printed keycaps (F8, F9, F10) from a different sample just to demonstrate the Fn lighting for this picture.
Facts:
In my assesment, the Fn function symbols are clearly visible from the backlight in a dark room. A user should have no difficulty to recognize the icon and reach its function.

Q: Which keyboard layouts do you offer in the EU?
A: The following layouts are available, in alphabetic order: Belgium, Czech, Danish, Dvorak German, Dvorak US, Estonia, French, German, Greek, Italian, Norwegian, Polish for Typists, Portuguese, Russia Latin, Slovakish, Spanish, Swedish / Finnish, Swiss, Turkish, UK, US International (ISO)All these layouts are based on the ISO matrix. See differences between ANSI vs. ISO here.


Operating System


Q: Do you support Linux and dual-boot on XMG FUSION 15?
A: We are in discussion to sell XMG FUSION 15 over Tuxedo with official Linux support. It might take 1 or 2 months to get this running.

Q: Which LAN, Audio and WiFi card vendors will be used? Asking for a friend.
A: From our HWiNFO64 report. (Google Drive link)
LAN: RealTek Semiconductor RTL8168/8111 [PCI\VEN_10EC&DEV_8168&SUBSYS_20868086&REV_15]Audio: Intel(R) Smart Sound Technology (Intel(R) SST) Audio Controller [PCI\VEN_8086&DEV_A348&SUBSYS_20868086&REV_10]WiFi: Intel(R) Wi-Fi 6 AX200 [PCI\VEN_8086&DEV_2723&SUBSYS_00848086&REV_1A], can be replaced.
For more information, please check the linked report file.


Other questions


Q: What would you say are the advantages and differences with other laptops due to the fact the laptop was designed in collaboration with Intel?
A: Disclaimer: I am \not* an Intel rep. The following remarks are based on my personal experience and opinion.*
Advantages:
  1. Very strict quality control on all levels. I can't quote numbers due to NDA, but Intel NUC has extremely low RMA rates, compared to average PC mainboards and systems. Intel is driven by strict internal regulation that strifes for perfection - this applies to the whole chassis, assembly and firmware, not only the mainboard. There are also certain regulations in place, for example in terms of electro-magnetic regulation and skin temperatures. The rating label is littered with regulatory seals from every region of the world, making this laptop especially safe to use.
  2. Access to high-quality material: we have not seen any Gaming Laptops based on Magnesium alloy yet, especially not in the ODM/LOEM ecosystem. The battery cells are also much more dense than what we usually see. Intel has the buying power and the vision to not settle for mediocre parts.
  3. Down-to-earth design: Intel has made this reference design for the ODM/LOEM eco-system. The design does not try to follow any specific corporate identity, thus it does not have any unneccessary "bling bling" like all the others have. Even the Razer Blade with it's sleek shape is quite obnoxious (iny my oppinion) with it's big backlit green snake logo. With XMG FUSION however, we can continue our typical style of "Undercover Gaming".
  4. Security: you can expect stellar support in terms of BIOS and Firmware (TPM, Management Engine) updates whenever any security issues are found. This might also apply to global brands, but ODM/LOEM systems have not always been so quick to react. This is due to the huge fragmentation/customizations in ODM/LOEM systems. Intel however does now allow any fragmentation: every LOEM partner is getting the same firmware. There are many hooks for configurations in this firmware, but the source code / binaries are always the same. This makes support much easier down the line.
Disadvantages:
  1. I can't name many, of course. But I would say the strict validation also makes the partnership less flexible from a product management perspective. There is no plan currently to phase-in any 4K or 300Hz screen (FHD/144Hz ought to be enough for everyone this year) or any Core i9 in this system. Other ODMs might be more open for costly modifications based on low quantities. Intel however has streamlined their production and logistics in a way that gives us (the LOEM) very short lead times and competitive pricing, but will not allow any short-notice upgrades or customizations.

Q: Will there be a 17 inch version?
A: We can neither confirm nor deny plans for a 17 inch version at this point.


[to be continued]
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MAME 0.219

MAME 0.219

MAME 0.219 arrives today, just in time for the end of February! This month we’ve got another piece of Nintendo Game & Watch history – Pinball – as well as a quite a few TV games, including Dream Life Superstar, Designer’s World, Jenna Jameson’s Strip Poker, and Champiyon Pinball. The previously-added Care Bears and Piglet’s Special Day TV games are now working, as well as the big-endian version of the MIPS Magnum R4000. As always, the TV games vary enormously in quality, from enjoyable titles, to low-effort games based on licensed intellectual properties, to horrible bootlegs using blatantly copied assets. If music/rhythm misery is your thing, there’s even a particularly bad dance mat game in there.
On the arcade side, there are fixes for a minor but long-standing graphical issue in Capcom’s genre-defining 1942, and also a fairly significant graphical regression in Seibu Kaihatsu’s Raiden Fighters. Speaking of Seibu Kaihatsu, our very own Angelo Salese significantly improved the experience in Good E-Jan, and speaking of graphics fixes, cam900 fixed some corner cases in Data East’s innovative, but little-known, shoot-’em-up Boogie Wings. Software list additions include the Commodore 64 INPUT 64 collection (courtesy of FakeShemp) and the Spanish ZX Spectrum Load’N’Run collection (added by ICEknight). New preliminary CPU cores and disassemblers include IBM ROMP, the NEC 78K family, Samsung KS0164 and SSD Corp’s Xavix 2.
As always, you can get the source and 64-bit Windows binary packages from the download page.

MAME Testers Bugs Fixed

New working machines

New working clones

Machines promoted to working

Clones promoted to working

New machines marked as NOT_WORKING

New clones marked as NOT_WORKING

New working software list additions

Software list items promoted to working

New NOT_WORKING software list additions

Source Changes

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Binary Options: Pricing and Greeks Price Action: binary options price action trading with candlestick analysis candlestick psychology FRM: Binomial (one step) for option price Using Option Calculator-Chuck Hughes BINOMIAL OPTION PRICING MODEL ST 2

Binary Option Calculator. Then the binary value can be converted binary option calculator to decimal value and vice-versa is possible too. Binomial-tree Option Calculator American style European Style Call Option Put Option CRR CRR++ CRR++RE CRR2 CRR2++ CRR2++RE JR JR++ JR++RE TIAN TIAN++ TIAN++RE TRG LR LRRE TRI Print input data in the plots The yield calculator for binary options, forex, CFD Binary option pricing. The payoff of binary options differ from those of regular options. Binary options either have a positive payoff or none. In the case of a binary call, if the price at a certain date, S T, is larger than or equal to a strike price K, it will generate a payoff Q.Notice, that it does not matter whether the future stock price just equals the strike, is somewhat larger or a Components of Binary Option Pricing. A Binary Option price, like traditional options, is a component of a number of different variables. These include the time to expiry, the current price, the expiry level and the volatility of the underlying asset. Binary options calculators have become a vital widget and trading tool for forex traders in developing trading strategies. Features of Binary Options Calculator. A typical binary options will have space for traders to maintain their currency and a parallel space where traders can input the currencies they intend to trade. In the case of binary options, where the profit margin is less than 100% per trade (i.e., simply doubling the previous transaction does not work here), this Binary Options Martingale Calculator will help you calculate the size of the next transaction

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Binary Options: Pricing and Greeks

While binary options theoretically play a role in asset pricing, they are prone to fraud and banned by regulators in many jurisdictions as a form of gambling $2000 in 5 minutes - my binary options ... American Binary Option Pricing: 3 Period Binomial Tree Model - Duration: 9:42. finCampus Lecture Hall 10,945 views. 9:42. Pricing an American Option: 3 Period Binomial Tree Model - Duration: 14:20. "Binary options are not promoted or sold to retail EEA traders. If you are not a professional client, please leave this page." Reliable Binary Options Broker with a ★Profit of up to 95%★! The binomial solves for the price of an option by creating a riskless portfolio. For more financial risk videos, visit our website! http://www.bionicturtle.com Using Option Calculator-Chuck Hughes Chuck Hughes Online. ... Best Binary Options Strategy 2020 - 2 Minute Strategy LIVE TRAINING! ... Selecting an Option Strike Price - Duration: 9:58.

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