Илья Below are the 10 most recent journal entries recorded in the "Илья" journal:

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April 18th, 2015
09:34 am

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Народное
Сценка с демонстрации протеста против войны в Украине в первых числах января 2015 года (про убийствo пенсионерки в Харькове газеты написали 6 января, и герой ролика говорит, что оно произошло "вчера"); это Россия, но я не знаю, где. Кто-нибудь узнает конную статую, показанную на 3:00?



- Во-первых, войска еще никто не ввел. Будет опасность для русских - введут войска.

- Русский народ, который живет на Украине, попросил их [sic] защитить.

Вот как в голове у мужчины в кожаной куртке умещаются эти два взаимоисключающих утверждения? Он следует завету Егора Холмогорова про вранье всей страной, что ли?

ЗЫ: говорят, что это Исаакиевская площадь в Питере.

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April 17th, 2015
08:55 pm

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Reading log
Rob Manning, William L. Simon, Mars Rover Curiosity (2014). Mars Science Laboratory is one of the great engineering projects of our time, a robot geologist and climatologist exploring Mars that is five times as heavy as the previous generation's Mars Exploration Rovers and carries ten times the mass of scientific instruments. How was it made? Over budget, over allotted time (it was originally supposed to launch in 2009, but didn't make the launch date, so it launched in 2011). With novel technology such as the skycrane landing. With some elegant engineering solutions (how will the descent stage know that the rover has touched the ground? its thrust will only support half as much weight as it did when the rover was in the air, so the descent stage will start rising, and will notice it). With a lot of testing, bugs, fixes, more testing, and so on. When the electrical cable between the descent stage and the rover is disconnected, the voltage in the rover's electronics changes, and it turned out that a certain computer chip was too sensitive to voltage changes, so the connection between the descent stage and the rover had to be redesigned. If the mechanism that provides hammering action for the drill breaks off, it can cause a short circuit, frying all the rover's electronics, so the rover's belly had to be opened and a new grounding wire installed two months before launch. Younger team members would ask Manning, "Is it always like this?", and he would reply, "No, this is the toughest project I've ever seen." If you are in a mood for engineering drama, this is a book for you, and so are other books on Mars rovers.

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April 14th, 2015
12:16 am

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Социолингвистическое
Любопытный ролик 2005 года. Русская крымчанка 1920х (по-видимому) годов рождения рассказывает о своей жизни как по-русски, так и по-крымскотатарски:



У моей бабушки был племянник 1924-1943 годов жизни; я несколько дней назад вспомнил бабушкин рассказ о том, что когда он в первый раз пришел домой из первого класса, он объявил: "Я це все знаю, я це все чув". Его отец был белорус, мать еврейка; дома они разговаривали по-русски (моя бабушка и ее сестра и брат совсем не знали идиша, что нехарактерно для евреев того поколения). Почему же он это сказал по-украински? Наверное, он ходит в украинский детский сад; наверное, в годы политики украинизации в Харькове не было достаточного числа русскоязычных детских садов. The past is a foreign country: they do things differently there.

В книжке светлейшего князя Анатоля Ливена про войну в Чечне рассказывается, как автор встретился с советским немцем, в 1941 году депортированным из Украины в Казахстан, где он влюбился в чеченку и в ее народ, женился на ней, принял ислам, из Вильгельма стал Мухаммедом, а при Горбачеве и хаджи Мухаммедом, и к пожилому возрасту стал главой большого клана и старейшиной тейпа. И такое бывает.

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April 12th, 2015
06:16 pm

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Reading log
James Mahaffey, Atomic Accidents (2014). The first explosion of a nuclear reactor took place in Nazi Germany in 1942. In a heavy water-based reactor built for a neutron multiplication experiment, the uranium caught on fire and exploded, showering the laboratory building with burning metal, which caused further fires. There have been more reactor accidents since, and this book goes over many of them. At the Windscale Unit 1 reactor in northern England in 1957, graphite caught on fire. At the SL-1 reactor in Idaho in 1961, water flashed into steam, which exploded. At the Chernobyl Unit 4 reactor in Soviet Ukraine in 1986, both things happened. This book goes through the causes and timelines of all these accidents. In the Sodium Reactor Experiment in 1959, the uranium was supposed to be in a stainless steel cartridge; its mark of stainless steel had a melting point far above the temperature reached in the reactor during an accident; yet the uranium and its radioactive decay products found their way into the sodium; what happened? Well, it was so hot that the uranium diffused into the stainless steel, creating a new alloy with a lower melting point; no one anticipated it. At the SL-1 reactor, an operator was supposed to lift a 100-pound control rod one inch; he lifted it 23 inches; we don't know, why, because he was instantly killed before revealing his motive. As also told in the book with the sensationalist title We Almost Lost Detroit, in the Fermi I breeder reactor, a sheet of zirconium was added as an extra safety feature not noted on the prints approved by the AEC; in 1966, the flow of sodium ripped it out and caused it to block an outlet, increasing core temperature and causing two fuel assemblies to melt down; after the crushed sheet was fished out of the reactor with great effort, it took a while before it was identified. There is a famous essay by software engineer Joel Spolsky saying that all abstractions are leaky; apparently, in nuclear engineering you can't abstract mechanics, chemistry and nuclear physics away from each other; they all glom onto each other. For example, when neutrons bombard graphite for months at a time, they displace the atoms, which causes the material to expand; synthetic graphite, such as that used in the Hanford B reactor, expands perpendicularly to the extrusion axis, while natural graphite, such as that used in the Windscale reactors, expands through all axes; this played a role in the Windscale fire.

In addition to accidents in nuclear reactors that were designed as such, this book also describes a number of criticality accidents, which is to say nuclear chain reactions in places that were not intended to be nuclear reactors. One particularly bizarre one took place in 1968 at Kombinat Mayak, the Soviet equivalent of the Hanford site, and involved a 60-liter stainless steel bucket with two handles, possibly stolen from the cafeteria kitchen, which had no business being near a plutonium solution. A night shift supervisor and two operators performed an unauthorized experiment, which involved one of the operators pouring a plutonium solution into the bucket. Flash! When radiation alarms sounded and everyone has evacuated, the supervisor talked the radiation monitor into allowing him back into the room, and he made the bucket fall into a puddle of plutonium solution. Flash again! In 1994 the supervisor, who absorbed 2,450 rems, was nominated for a Darwin award.

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April 7th, 2015
01:09 pm

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Физическое
Никому больше не кажется, что использование этого девайса на автомобиле противоречит Закону сохранения энергии?

Вот, кстати, ответ на вопрос, зачем будущим не-физикам в школе изучать физику: чтобы не тратить деньги на такие девайсы.

(via /r/wind)

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April 5th, 2015
04:51 pm

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Gevolt
Новый сингл от единственной в мире металл-группы, поющей на идише.



Перевод Мне там кое-что кажется странным: "хохочет" - это заимствование из русского, глагол в настоящем времени, а "гевент" - плакавший, причастие прошедшего времени; как эти слова соединяются союзом "ун"?

Да, это не то, что обычно понимается под идишской музыкой; обычно под ней понимается нечто вроде этого. Ну, и что? В художественных музеях в Сиэттле и Портленде много американского индейского искусства, особенно индейцев Северо-Восточного тихоокеанского побережья Северной Америки - от созданного в 18м веке или ранее, до контакта с европейской цивилизацией, до современного; эту маску вырезал в 1993 году канадский резчик по дереву индейского (квакиутль) происхождения в память об аварии на Чернобыльской АЭС; он также вырезал маску перенаселения, маску разлива нефти и т. д. (см., см.). И что, современная тематика этих масок лишает их права называться индейским искусством?

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April 3rd, 2015
04:30 pm

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Reading log
Clive Irving, Wide-Body (1993). This book is an analogue of The Soul of a New Machine by Tracy Kidder, except it is about the famous Boeing 747 airliner, not an obscure 1980s minicomputer. However, it starts out much earlier. When the Allies occupied Germany in the summer of 1945, they discovered a vast secret aerodynamic research center in a forest near Braunschweig. Its laboratories and wind tunnels gathered data that said that in order to fly near or above the speed of sound, a jet aircraft should have a swept-back wing. Boeing's chief aerodynamicist was so impressed by what he saw that he wrote a seven-page letter back to Seattle, putting "Censored" on the envelope to avoid the delay of censorship. This led to the design of the Boeing B-47 Stratojet bomber. A jet engine on a military airplane could be hit with a bullet, and the blowtorch coming from the bullet hole should not fry the crew or burn through a wing; so the jet engines were put in nacelles on struts underneath the wing, where the slipstream could carry the flames away. Serendipitously, this turned out to have good aerodynamic properties: the nacelles counteracted the tendency of the swept wing to pitch up during turns. The prototype XB-47 easily outran its chase plane, the straight-wing Republic F-84 Thunderjet, which was the fastest fighter plane in possession of by the US Air Force. However, the airplane had a tendency to "Dutch roll": alternate rolling and yawing. This was suppressed by a feedback mechanism connected to the rudder called the yaw damper. The Boeing B-52 Stratofortress was a bigger airplane with the same configuration as the B-47 but more engines. The company's first civilian jet airliner, the Boeing 707, also followed the same configuration, developed circa 1946, and so did all the subsequent Boeing 7x7 airliners, all the way to the Boeing 787 Dreamliner, which first flew in 2009, almost to the day 62 years later than the XB-47.

The second part of the book is specifically about the Boeing 747, which is essentially the Boeing 707 scaled three times bigger, which was enabled by the development of high-bypass turbofan engines; I already knew the story from the autobiography of Joe Sutter, the chief designer of the airplane. I found aerodynamics and control theory (or rather hints of them for someone who has never studied them in college) more interesting than business history: how the limitations imposed by the laws of physics dictated the form that was followed by the American Boeing 7x7, the European Airbus A3x0 and even the Soviet Ilyushin Il-86 and Il-96 (Sutter tells about a meeting with Soviet engineers in Paris where he explained to them his reasons for putting engines in nacelles underneath the wing, and they shared knowledge about working with titanium, a metal needed by the later-canceled Boeing 2707 supersonic transport). How little progress there has been in the last 50 years of civil aviation compared to the previous 50 years! At the Hiller Aviation Museum in San Carlos CA there is a 20-foot oblique flying wing investigated by NASA and Stanford University circa 1990 as a prototype of a supersonic airliner that would change its sweep angle as it flew; if built, it would be a radically new aircraft configuration. However, in reality no one is going to build something so radically new, and telecommuting and teleconferencing are gradually obviating high-speed air travel anyway.

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April 2nd, 2015
05:58 pm

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Телевизионное
Давно не смотрел ролик российского телевидения с таким восхищением (неироническим, несаркастическим):



Dare to be a Daniel,
Dare to stand alone!
Dare to have a purpose firm!
Dare to make it known.

А разве российское правительство хвалило Гитлера до 1939 года? Я помню, что в "Известиях" напечатали статью какого-то профессора международных отношений, который это делал, что я воспринял как очередной признак приближающегося апокалипсиса, но это был не член российского правительства.

"- Люди, которые сравнивают фашистскую Германию с моей страной - это моральные уроды. Вы оскорбили каждого из них, каждую семью здесь!" А моя бабушка участвовала в аннексии Восточной Польши в сентябре 1939 года, которая проводилось согласованно с нацистской Германией, в звании капитана медицинской службы, о чем я уже сто раз рассказывал в ЖЖ.

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12:31 pm

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Программистское
Какой доставляющий баг!

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April 1st, 2015
08:24 am

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Харчиков


В самом деле: как поступать с людьми, которые от тебя отличны, и своим существованием вызывают у тебя интеллектуальный дискомфорт? Нет, чтобы осознать, что они - такие же граждане, как и ты, и вы должны выработать компромиссные правила совместной жизни. Эту точку зрения продвигают госдеповские грантососы - жиды и педерасты. Вместо этого, их нужно лишить прав, выслать или убить, а для этого их сначала нужно крепко возненавидеть.

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