My housemate was a genius. I don't regret burning him alive.

I'm pretty sure I lived with a literary genius. A once-in-a-generation mind akin to Dickens or Shakespeare, with contents as dangerous as Robert Oppenheimer's or Salman Rushdie's. Whereas Dickens and Shakespeare helped shape the world though, Roy Bardiquet would have no doubt ended it.

Roy's stories and poems had readers laughing, crying, enraged, even sleeping at his whim. He'd set out a goal, then created a string of vowels and syllables with which he played his readers hearts like musical instruments.

His romance poetry had the most reserved of folk spontaneously professing undying love to bemused soon-to-be sweethearts. His tales of nation-forging heroism on the battlefield inspired more than one lad to drop out of university and enlist. His dramas thematically exploring death and loss left none who poured through them with dry eyes.

Those times weren't what made me burn down our student accommodation while he was still inside, though. No. It was the stories he wrote after deciding he wanted to make people scream which did that.

I've been in prison for a few years now. Arson and murder, in case you were wondering. This is it for me. It's worth it though. I may be legally guilty, but my soul carries the weight of zero regrets. Sure, you could agree with the shrink and call me a walking delusional martyr complex. I don't care. I know my life behind bars is a sacrifice I've made for the good of humanity. Fuck knows what would have happened if those stories were ever published.

As I said, Roy had a way with words. I met him in the first year, his room being next to mine in our flat. By the second, he and I were moving into a shared house with two others (Lisa and Ted, and coincidentally the latter’s testimony to my outstanding character managed to knock all of two years from my sentence). Throughout our friendship, I could tell that Roy was different. No, not different. Different is the wrong word. Gifted. Yeah, let's go with that. He was gifted in a way that few have the privilege of encountering.

At first, I felt lucky to know him. Word about the tall guy in the duffle coat who made the famous guest lecturer break down into floods of tears got around quickly. I don't want to reveal her name, because I don't want any media hassle caused by a show-trial when they sue for defamation (the public hate me too much for it not to be used to add another decade to my stretch). If the words "vampire baseball" mean anything to you, you'll be familiar with

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📰︎ r/nosleep
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📅︎ Sep 01 2021
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Thermodynamic process for distillation (concept) - searching for startup partners or advice.

The process, described below, can be applied in multiple situations, therefore I share the idea to discuss and also I’m searching for partners to create a startup(s) around this idea.

Any advice is welcome!

The idea of the distillation process is to evaporate fluid from mixture to critical state, which decreases the latent heat of evaporation to zero, and then returns heat energy and pressure energy through a system of heat exchangers and high-efficient pressure exchangers to the feeding mixture.

The advantages of the process are:

- Minimum energy usage. The latent heat is zero in the process; heat and pressure energy returns to feeding mixture inside the process. The energy is used only to reduce Entropy and to compensate inefficiency of process, and it means that the energy usage has to be close to the theoretical minimum for a distillation process. It is much more effective than the reverse osmosis process.

- The process uses heat energy - which is the cheapest type of energy.

- The process is very suitable for solar concentrators. Using direct transformation of heat to distillation, it gives an opportunity for solar concentrators to work with highest efficiency, because the process does not waste heat, as other processes do.

Some Clarifications.

Pressure Exchanger (PX) - a device that transfers pressure energy from a high pressure fluid stream to a low pressure fluid stream. There are a lot of types of this device and it is widespread in the desalination industry. Here is the simplified scheme :

https://i.redd.it/7kncf2rwgo851.gif

Basically, it is a chamber, with a free diaphragm inside and a system of valves and pipes around the chamber. There is no moving parts except diaphragm.

In the diagram the PX feeds the high pressure process, using energy of downstream liquid.

The efficiency of the PX is very close to 100% under the following conditions:

- operates with liquids (no gas)

- pressure drops and pressures are equival upstream and downstream

- flow rates are balanced out upstream and downstream.

Therefore a high pressure pump is needed only for startup and PX inefficiency compensation.

An example of a very similar pressure-exchanger is DWEER, presented in the desalination industry, 4 min video from 2.00: www.youtube.com...

Diaphragm Pressure exchangers were invented in the 70s or earlier, it is an established technology.

**Here is the simplified

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👤︎ u/Frezer7
📅︎ Jul 03 2020
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I was abdopted by aliens (part 1)

I heard the voices first. A low murmuring. Darkness turned to light and my vision adjusted. A bright orb shifted back and forth, blinding me. Beyond the dancing sun, a woman came into focus. She was wearing a white coat, dress shirt and tie. A doctor. There was a man beside her wearing navy blue scrubs. A nurse. Both, according to the algorithms of society, were attractive. The doctor waved the flashlight. The nurse wrote on a clipboard. The walls were covered with posters. Some outlined specific ailments. There was one for nasal infections, another for HIV. Cancer. There were diagrams of the human anatomy, and a tiny skeleton hanging in the counter. The room was nine by eight cubic feet. The fluorescent bulbs contained mercury and hummed overhead.

“Can you hear me?” the doctor asked.

I nodded. The nurse prepared a needle and blood bag.

“Do you know your name?”

“J-- James.”

“What’s your last name, James?”

“Carmichael.”

“When is your birthday?”

“I don’t know. Where am I?”

“A hospital.”

“Why am I in a hospital?”

“You were in an accident.”

“What kind of accident?”

The nurse popped the cap from the needle and the doctor took a deep, calming breath.

“Can you tell me how many fingers I’m holding up?”

“Three. What kind of accident?”

The nurse bent over and stuck my arm with the needle. I winced.

“Relax and flex your fist,” the nurse said.

I clenched a fist and there was a weakness in my elbow that shot up through my shoulder and clenched my brain. Blood began pumping through the tube and filling up the bag. The nurse went about his duties mechanically. Today was going to be no different. Just another day. Just another routine procedure. Except, by their puzzled expressions and simmering anxiety I could tell that nothing about this was conventional.

“Do you remember anything about the accident?”

Something caught the nurse’s eye. An irregularity in his otherwise mundane routine. The color of the blood was off. It was dark and full of toxins. Every color combined and flowed into a thick oily sheen. He tilted his head in wonder.

“Oh um,” the nurse couldn’t quite place it.

“No,” I said unbothered. “What kind of accident?”

“A serious one,” the doctor said.

“What do you mean by— What does that mean? Serious? How serious?” I managed to get out.

“Dr. Peterson,” the nurse whimpered.

“You don’t remember anything at all?”

“Dr. Peterson,” the nurse barked nervously. “You need to see this.”

Doctor Peterson looked up from her notes and her face dropp

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👍︎ 63
📰︎ r/nosleep
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📅︎ Mar 27 2019
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2003 R6 - Gas / Oil in two of the throttle bodies, missing velocity stacks?

Hello all!

First I apologize if my terminology is not up to par!

Today I had my throttle body off to clean my fuel injectors and one of the throttle valves (#33 in this picture: https://www.partsnerd.com/oemparts/a/yam/50044dcbf8700209bc791403/intake-2 ) got a bit stuck open. I pulled them apart and found that two of them were completely dry and the rubber looked kind of parched. The other two had some oil and possibly gasoline in them. The rubber diaphragm looked wet.

I'm not sure which is preferred or if this matters at all! Just curious for some input.

Here are pictures of the parts: https://imgur.com/a/H2I6UTd

My other concern came up when looking at a parts website. It looks like I am supposed to have plastic velocity stacks (?) on the inside of my airbox. Parts #14 and #15 in this diagram: https://www.partsnerd.com/oemparts/a/yam/50044dcbf8700209bc791402/intake

I definitely am missing these pieces! Could the previous owner have lost them or took them out when he put in the after market air filter? (BMC)

Should I buy these and install them, or am I missing something?

Thank you guys!!

Hunter

👍︎ 3
📰︎ r/Fixxit
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👤︎ u/HunterHx
📅︎ Jun 04 2019
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Another Vent Post

I got to thinking about the impending vent shortage here and how best to mass produce something helpful. This it basically all rambling, so take it for what it's worth. There's 1 way valves along this so it's not like it's all free flow.

Take something like a vent mixed with an industrial fan. Make it able to generate something like 200L/min flow. Cap it at 30cmH2O pressure it generates on export. Have that split into 6 different tubes. Pipe those to patient bed.

Have it come to your vent module. Pressurized air comes in, passes through a solenoid, then to patient where, upon exhalation, it gets split to two potential pathways. After a set amount of time, the solenoid toggles, as well as another solenoid for exhalation. Patient exhales, solenoids reset, cycle repeats.

The other exhalation pathway is a clear and free tube that goes back to by the pressure input tube and uses a diagram valve to close it. This means that in order to exhale beyond this diaphragm valve, pressure has to reach over 30cmh2o or whatever the air compressor is set to. So long as that compressor generates a flat pressure and can keep up when it drops, there'll always be pressure to a patient.

And that's how you build a rudimentary multipatient APRV vent.

Flow sensors can be put in with a Venturi flowmeter setup for cheap. FiO2 is still a little tricky, not sure if the compressor should do that (and everyone shares one fio2) or the tubing to the pt should have a port in for this. Phigh is whatever the compressor is set to, plow is zero. Thigh and Tlow are set by the solenoids and their programming, whether Arduino or something more basic.

Probably just a thought experiment I guess. Ways to improve it?

👍︎ 2
📰︎ r/ems
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📅︎ Mar 30 2020
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The principles of Soviet oxygen regenerating rebreathers.

This post will cover all the basic components of a Soviet oxygen regenerating rebreather, starting with the regenerative canister.

Regenerative Canister:

For the regenerative canister, I will cover it in two parts, as it is the most complex of all the components. 1. The Chemistry. 2. The construction of an average regenerative canister.

1. The Chemistry:

There are eleven main chemical reactions that occur within the regenerative canister: 

Note: This is for a generic regenerating canister, as NaO2 and KO2 can be swapped, or be used side by side, depending on the canister. As such all combinations were put down. For a RP-6 canister, NaO2 is the main chemical. RP-4, KO2. [3] 

In the main canister:

2NaO2 + Н2О -> 2NaOH + 1.5O2 + Heat
2KO2 + H2O -> 2KOH + 1.5O2 + Heat
2NaOH + CO2 -> Na2CO3 + H2O + Heat
2NaO2+CO2 -> Na2CO3 + 1.5O2 + Heat
2KO2 + CO2 -> K2CO3 + 1.5O2 + Heat
Ca(OH)2 + CO2 -> CaCO3 + H2O + Heat


In the starting briquette (will get to this in construction, basically it's what starts the canister):

2KO2 + H2O -> 2KOH + 1.5O2 + Heat
2NaO2 + Н2О -> 2NaOH + 1.5O2 + Heat
2KO2 + Н2SO4 -> K2SO4 + 2H2O + 1.5O2 + Heat
2Аl + 1.5O2 -> Аl2O3 + Heat
2Al(OH)3 + 3H2SO4 = Al2(SO4)3 + 6H2O + Heat

It can be seen that many of these reactions either liberate oxygen, or liberate heat, or both (as well as consume carbon dioxide). The ones which release heat contribute to heating the canister and making the ones which take carbon dioxide and produce oxygen proceed faster. These all combine in making breathable air within the rebreather. [1][4][3]
  1. The Construction:

    Construction can differ among different regenerative canisters. However, again the chemistry is the same among them.

    I will be covering the most common type of regenerative canister, which has a cylindrical shape. (As seen in the RP-4, RP-4-01, RP-6, RP-7B, RP-46, and others). I will however correlate where chemistry happens with canisters such as the RP-5. In general, the construction of a cylindrical cylinder can be summed up by this diagram. (This diagram in particular is of a RP-4):

http://patents.su/patents_4/images/1677893-1.gif [1]

First I will cover the chemical contents, and then the mechanical devices on the canister. 

2. in the diagram refers to the starting briquet
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👍︎ 16
📰︎ r/gasmasks
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📅︎ Sep 03 2019
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I could use some help regarding Arduinos for my senior engineering project.

A little bit of background:

I'm a senior mechanical engineering student, I graduate in May. I've only taken one class for electrical stuff, it was introduction to DC & AC circuits, and I've never taken a single coding class. I've submitted my proposal for my senior project and it has been approved. Now I just need to build it.

My project is an automated mixed drink dispenser. My project partner decided this would be an easy project, but we're finding difficulty in the electrical portion due to both of us being mechanical students.

Our problem:

Essentially we plan to use arduino for our circuit and intend to run 4 12V diaphragm pumps for different amounts of times in order to create our mixed drink ratios. All the mechanical stuff is figured out already, all pumps, tubing, valves, and nozzles have been figured out. All Flow calculations have been done. Everything will work, we just need the brain for our machine. The only problem is we know literally nothing about Arduinos and what they're capable of.

I was wondering if anyone here could offer some help as to the best plan to acquaint myself with Arduinos and their code. Any help would be greatly appreciated!

I've added a basic process flow diagram so you can really see what we're doing.

https://preview.redd.it/mtfmmrq8fb321.png?width=908&format=png&auto=webp&s=3709890d1cc35d3f25748728d5e7cc4382ddc8f0

👍︎ 2
📰︎ r/arduino
💬︎
📅︎ Dec 09 2018
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Constructing a fuel system

Hello!

For one an assignment required by my university, I am in need of domain knowledge expertise to build a Bayesian Network. We are asked to outline the complex system within a fuel system. The fuel system is given one of two states: faulty or okay.

My lecturer wrote "Asking you to build a ’real’ network with actual domain experts is not realistic within the time frame of the course"

I would like to prove her wrong with the collective mind of experts and make this network as realistic as possible and would like to call upon your expertise to help me develop it further.

So far I have deduced that it's a petrol and found this link (http://www.crazymechanical.in/notes/automobile-engineering/fuel-supply-system-in-petrol-engine/) which consists of four components. From this I'm trying to decide what can be improved/expanded upon. Diagrams, opinions, inputs would be greatly appreciated!

  • Fuel Tank; states are {Full; 3/4,1/2,1/4 Empty}.
  • Filter; states are (?) {clean, dirty,} -> Can this be broken up further?
  • Fuel pump (consisting of the upper, lower,valve, diaphragm,return spring, push rod, rocker arm); Overall states are: {Working, not working}; individual states might need a bit more work..
  • Carburetor (consisting of a throttle plate, emulsion tube chamber, fuel jet chambers, vent); Overall States are: {blocked, unblocked}; individual states (throttle plate: {open, closed and rusted, new}, emulsion {...}

The other thing I need to work out is the likelihood of it (being a state happening. E.g. A fuel tank is more likely to be 3/4 full in the average car than empty. Would you know where I can find information about the specific component states? It can be as thorough or as vague as possible.

Thanks a bunch!

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📅︎ Oct 17 2018
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HPA Basics: QEV Blasters

#Quick Exhaust Valves

Quick Exhaust Valves (QEVs) open a new door into performance in totally custom internal HPA blasters. If you want the highest FPS, use a QEV. They are an interesting valve that allows for the delivery of a set volume of air at very high flow rates very controllably. "Back pressure" tanks such as the XBZ are actually disguised QEVs.

#Function

So how does a QEV actually work? For a basic rundown have a read of the HPA Basics: Introduction on QEV’s. Simply put, they have 3 ports:

  • Pressure (P) for the air supply, typically from a 2/3
  • Outlet (A) for the airtank
  • Exhaust (R) for the breech and barrel

Internal to the QEV is a diaphragm. When the air comes into the Pressure port, it seals off the Exhaust port and fills the Outlet. It will remain like this until the air pressure in the Pressure port drops significantly below the air pressure in the Outlet port. At this point, the pressure difference causes the diaphragm to flip, and all the air inside is vented quickly out the Exhaust. Once the air flow is returned to the Pressure port the cycle restarts.

The “Quick” in QEV is very important. The diaphragm flipping means a massive cross sectional area is suddenly open which allows the air to escape very quickly resulting in much higher performance than a pin pull tank for an identical pressure and volume. This also means it is very consistent, and is not affected like a pin pull tank by a slow trigger pull.

The primary concern is to ensure that the air is vented quickly from the Pressure port. If it is too slow, the diagram may prematurely reseal and begin vibrating between open and closed and the Pressure and Outlet pressures drop. This is usually not an issue with any normal configuration but is important to keep in mind; a large volume of air between the 2/3 valve and the QEV Pressure port will cause issues.

Here is an simple diagram to illustrate the basic of a QEV. Air initially fills the QEV (red) from the 2/3 valve. When the valve is depressed, the air between the 2/3 and the Pressure port is vented (green) and then all the air sorted in the tank is fired (blue).

#Example Build

QEV based builds are near infinite in their variety because of the “homemade” nature of their internals. Here is an example of a very basic build with a fully ported 2/3 valve and a 1/4 inch QEV. The airtank is threaded steel fittings and adapters and the bike pump is the air suppl

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👍︎ 7
📰︎ r/HPAnerf
💬︎
👤︎ u/rhino_aus
📅︎ Mar 16 2017
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Balanced Scuba Diving Regulator

How does a balanced scuba diving regulator work? That can be a complicated question that I’m going to try and answer as simply as possible.

Forget right now whether we are talking about a piston type diving regulator or a diaphragm type. The principle is the same even if the actual hardware is different.

The purpose of The first stage of a scuba regulator is to take the high pressure in the tank, which you can’t breathe, and reduce it into low pressure air which you can.

A balanced regulator keeps the pressure of this breathable air the same, 145-150 psi above ambient pressure, no matter what depth you are at or what the pressure of the air is in your tank.

When you go up or down the pressure of the water around you (ambient pressure) changes, and as you breathe the pressure you have in your tank drops. A balanced diving regulator should “breathe” the same no matter what.

Balanced Piston Scuba Diving Regulator

Here is a simplified balanced piston style scuba regulator diagram.

At rest the pressure in the Intermediate chamber is greater than the Ambient water pressure. This is pushing the piston to the right, against the spring and seating the valve firmly, cutting off the HP air flow from your tank.

When you take a breath trough the second stage, the pressure in the intermediate chamber drops and the ambient water pressure and spring push the piston to the left, unseating the valve and letting air flow through the valve from the HP chamber.

When you stop taking air from the second stage, the pressure in the intermediate chamber rises and works to push the piston back to the right, seating the valve and stopping the air flow.

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👍︎ 3
📰︎ r/scuba
💬︎
📅︎ Oct 20 2017
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I was abdopted by aliens (part I)

I heard the voices first. A low murmuring. Darkness turned to light and my vision adjusted. A bright orb shifted back and forth, blinding me. Beyond the dancing sun, a woman came into focus. She was wearing a white coat, dress shirt and tie. A doctor. There was a man beside her wearing navy blue scrubs. A nurse. Both, according to the algorithms of society, were attractive. The doctor waved the flashlight. The nurse wrote on a clipboard. The walls were covered with posters. Some outlined specific ailments. There was one for nasal infections, another for HIV. Cancer. There were diagrams of the human anatomy, and a tiny skeleton hanging in the counter. The room was nine by eight cubic feet. The fluorescent bulbs contained mercury and hummed overhead.

“Can you hear me?” the doctor asked.

I nodded. The nurse prepared a needle and blood bag.

“Do you know your name?”

“J-- James.”

“What’s your last name, James?”

“Carmichael.”

“When is your birthday?”

“I don’t know. Where am I?”

“A hospital.”

“Why am I in a hospital?”

“You were in an accident.”

“What kind of accident?”

The nurse popped the cap from the needle and the doctor took a deep, calming breath.

“Can you tell me how many fingers I’m holding up?”

“Three. What kind of accident?”

The nurse bent over and stuck my arm with the needle. I winced.

“Relax and flex your fist,” the nurse said.

I clenched a fist and there was a weakness in my elbow that shot up through my shoulder and clenched my brain. Blood began pumping through the tube and filling up the bag. The nurse went about his duties mechanically. Today was going to be no different. Just another day. Just another routine procedure. Except, by their puzzled expressions and simmering anxiety I could tell that nothing about this was conventional.

“Do you remember anything about the accident?”

Something caught the nurse’s eye. An irregularity in his otherwise mundane routine. The color of the blood was off. It was dark and full of toxins. Every color combined and flowed into a thick oily sheen. He tilted his head in wonder.

“Oh um,” the nurse couldn’t quite place it.

“No,” I said unbothered. “What kind of accident?”

“A serious one,” the doctor said.

“What do you mean by— What does that mean? Serious? How serious?” I managed to get out.

“Dr. Peterson,” the nurse whimpered.

“You don’t remember anything at all?”

“Dr. Peterson,” the nurse barked nervously. “You need to see this.”

Doctor Peterson looked up from her notes and her face dropp

... keep reading on reddit ➡

👍︎ 15
📰︎ r/cryosleep
💬︎
📅︎ Jul 04 2019
🚨︎ report

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