#science #video
Пара видео о модели атомной решётки, состоящей из десятка тысяч шариков для подшипника.
3000 ball bearings show crystal defects with Matt Parker — демонстрирует модельные аналогии реальных дефектов кристаллической решётки.
Self organising steel balls explain metal heat treatment — демонстрирует влияние аналога нагрева на модель, чему отвечают эти изменения в реальных материалах и как это в конечном счёте сказывается на физических свойствах.
Пара видео о модели атомной решётки, состоящей из десятка тысяч шариков для подшипника.
3000 ball bearings show crystal defects with Matt Parker — демонстрирует модельные аналогии реальных дефектов кристаллической решётки.
Self organising steel balls explain metal heat treatment — демонстрирует влияние аналога нагрева на модель, чему отвечают эти изменения в реальных материалах и как это в конечном счёте сказывается на физических свойствах.
YouTube
3000 ball bearings show crystal defects with Matt Parker
Watch Matt's video here: https://youtu.be/3inLMXcetUA
I recreated an old desk toy called Atomix to demonstrate crystal defects like vacancies, grain boundaries and stacking faults. We touch a little bit on close packing problems in mathematics. That's…
I recreated an old desk toy called Atomix to demonstrate crystal defects like vacancies, grain boundaries and stacking faults. We touch a little bit on close packing problems in mathematics. That's…
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#prog #science #bio #video
Logic gates made of DNA beat me at tic-tac-toe
Даже будучи объяснённым, всё равно выглядит круто.
Logic gates made of DNA beat me at tic-tac-toe
Даже будучи объяснённым, всё равно выглядит круто.
YouTube
I played tic-tac-toe against DNA
The first 100 people to use code science at the link below will
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Deoxyribozymes are catalysts made of DNA instead of proteins. With some clever manipulation they can be turned into molecular computers that…
get 20% off of Incogni: https://incogni.com/science
Deoxyribozymes are catalysts made of DNA instead of proteins. With some clever manipulation they can be turned into molecular computers that…
#science #psy #suckassstory #article
The Control Group Is Out Of Control
Или плач о слабости научного метода на примере исследования и последовавшего мета-анализа, достаточно строго показывавшего существование парапсихологических феноменов.
Мой любимый отрывок (disclaimer: упоминаемая статья — не та, которую я упоминаю во введении):
Wiseman & Schlitz’s Experimenter Effects And The Remote Detection Of Staring is my favorite parapsychology paper ever and sends me into fits of nervous laughter every time I read it.
The backstory: there is a classic parapsychological experiment where a subject is placed in a room alone, hooked up to a video link. At random times, an experimenter stares at them menacingly through the video link. The hypothesis is that this causes their galvanic skin response (a physiological measure of subconscious anxiety) to increase, even though there is no non-psychic way the subject could know whether the experimenter was staring or not.
Schiltz is a psi believer whose staring experiments had consistently supported the presence of a psychic phenomenon. Wiseman, in accordance with nominative determinism is a psi skeptic whose staring experiments keep showing nothing and disproving psi. <...>
The idea was to plan an experiment together, with both of them agreeing on every single tiny detail. They would then go to a laboratory and set it up, again both keeping close eyes on one another. Finally, they would conduct the experiment in a series of different batches. Half the batches (randomly assigned) would be conducted by Dr. Schlitz, the other half by Dr. Wiseman. Because the two authors had very carefully standardized the setting, apparatus and procedure beforehand, “conducted by” pretty much just meant greeting the participants, giving the experimental instructions, and doing the staring.
The results? Schlitz’s trials found strong evidence of psychic powers, Wiseman’s trials found no evidence whatsoever.
Take a second to reflect on how this makes no sense.
The Control Group Is Out Of Control
Или плач о слабости научного метода на примере исследования и последовавшего мета-анализа, достаточно строго показывавшего существование парапсихологических феноменов.
Мой любимый отрывок (disclaimer: упоминаемая статья — не та, которую я упоминаю во введении):
Wiseman & Schlitz’s Experimenter Effects And The Remote Detection Of Staring is my favorite parapsychology paper ever and sends me into fits of nervous laughter every time I read it.
The backstory: there is a classic parapsychological experiment where a subject is placed in a room alone, hooked up to a video link. At random times, an experimenter stares at them menacingly through the video link. The hypothesis is that this causes their galvanic skin response (a physiological measure of subconscious anxiety) to increase, even though there is no non-psychic way the subject could know whether the experimenter was staring or not.
Schiltz is a psi believer whose staring experiments had consistently supported the presence of a psychic phenomenon. Wiseman, in accordance with nominative determinism is a psi skeptic whose staring experiments keep showing nothing and disproving psi. <...>
The idea was to plan an experiment together, with both of them agreeing on every single tiny detail. They would then go to a laboratory and set it up, again both keeping close eyes on one another. Finally, they would conduct the experiment in a series of different batches. Half the batches (randomly assigned) would be conducted by Dr. Schlitz, the other half by Dr. Wiseman. Because the two authors had very carefully standardized the setting, apparatus and procedure beforehand, “conducted by” pretty much just meant greeting the participants, giving the experimental instructions, and doing the staring.
The results? Schlitz’s trials found strong evidence of psychic powers, Wiseman’s trials found no evidence whatsoever.
Take a second to reflect on how this makes no sense.
Slate Star Codex
The Control Group Is Out Of Control
I. Allan Crossman calls parapsychology the control group for science. That is, in let’s say a drug testing experiment, you give some people the drug and they recover. That doesn’t tell …
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#science
Нептун гораздо менее синий, чем многие считают.
ras.ac.uk/news-and-press/news/new-images-reveal-what-neptune-and-uranus-really-look
Нептун гораздо менее синий, чем многие считают.
ras.ac.uk/news-and-press/news/new-images-reveal-what-neptune-and-uranus-really-look
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#science #video
На протяжении многих лет среди физиков стоял вопрос (который почему-то получил имя Фейнмана): что будет, если поместить вращающийся разбрызгиватель в жидкость и начать втягивать жидкость через трубки вместо того, чтобы через них выливать? В какую сторону будет вращаться конструкция, и будет ли вращаться вообще? Разумные аргументы звучали с обеих сторон, и лишь недавно это смогли проверить в эксперименте, в котором максимально снизили посторонние факторы.
youtube.com/watch?v=EM-VWNb5Trk
На протяжении многих лет среди физиков стоял вопрос (который почему-то получил имя Фейнмана): что будет, если поместить вращающийся разбрызгиватель в жидкость и начать втягивать жидкость через трубки вместо того, чтобы через них выливать? В какую сторону будет вращаться конструкция, и будет ли вращаться вообще? Разумные аргументы звучали с обеих сторон, и лишь недавно это смогли проверить в эксперименте, в котором максимально снизили посторонние факторы.
youtube.com/watch?v=EM-VWNb5Trk
YouTube
How Physicists FINALLY Solved the Feynman Sprinkler Problem - Explained
A 140 year-old physics problem may have just been solved...Can a sprinkler work and spin in reverse? Comment your answer below as I take a look into this breakthrough research experiment that claims to solve the mystery, once and for all...
Read the paper…
Read the paper…
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