TW: нудный гик-стафф про бытовую технику.
Кофемашина в какой-то момент не включила индикатор переполненности контейнера для жмыха. Это странно, поэтому я стал разбираться. Вообще, техника редко глючит непонятным образом и ведет себя хаотично. Всегда есть какая-то причина. При отладке программы это тоже надо всегда помнить.
Как машина узнаёт, что контейнер полон? Никак. У контейнера есть герконовый датчик, показывающий факт его установки в корпус. Когда ты его вытаскиваешь, машина думает, что ты его очистил. А дальше программа просто знает, что одинарный кофе наполняет контейнер на X, двойной на 2X, а вместимость nX.
Что произошло: я открыл контейнер посмотреть, заполнен ли он целиком. А потом закрыл обратно, не очистив. В оценке уровня жмыха появилась аддитивная погрешность.
Если позволить человеку ввести систему в неправильное состояние, он рано или поздно это сделает. Кстати, по той же причине мне нравится DDD как архитектура для энтерпрайз разработки: если всё правильно спроектировать, то программист слоя приложения, который является "пользователем" домена, не сможет сломать состояние сущностей и агрегатов.
В общем, в машине не хватило защиты от дурака. Как бы я решал эту задачу? Сходу приходит в голову какой-нибудь оптический датчик в верхней части контейнера. В худшем случае он запачкается и сработает ложно-положительно, что вызовет необходимость для пользователя лишний раз почистить контейнер.
Но ТРИЗ намекает нам на другой подход. Можно попробовать полностью исключить появление жмыха. Так устроены, например, капсульные машины. У нас такая была, но перешли на зерновую, потому что вкусный качественный кофе в зёрнах на порядки дешевле, чем в капсулах, а пьем мы его много. Особенно кофе с молоком, для которого в капсулах просто концентрат, а не настоящее молоко.
Если исключить жмых нельзя, то нужно сделать его удаление неотъемлемой частью процесса обслуживания машины. Думаю, я бы попробовал объединить конструктивно контейнер для зёрен и для жмыха, и рассчитать объёмы так, чтобы второго хватило на один цикл траты первого. Тогда даже датчики не нужны: кончились зёрна, и ты неизбежно достаешь контейнер и очищаешь.
Сфоткал для вас чашечку ароматного капучино.
#life
Water can boil and freeze simultaneously at its "triple point," a specific, low-pressure state (0.01°C at 611.657 pascals) where solid, liquid, and gas phases coexist in equilibrium. Under these precise vacuum conditions, water molecules with enough energy escape as vapor (boiling), while the rapid heat loss causes remaining molecules to freeze.
@googlefactss#physics
On Pioneer 11
In December 1974 Pioneer 11 skimmed within 27.000 miles of Jupiters southern polar region.
Observations in the infrared from Pioneer 10 a year earlier had already indicated that the planet was much brighter than would be the case had it merely been a planet reflecting light.
D.A. Allen noted that Jupiter appeared so bright that it must be radiating more energy than it could absorb from the Sun.
"When the long wavelength data are also included, we find that Jupiter radiates nearly three times the energy it receives." - D.A. Allen, Infrared: The New Astronomy (1975)
This discovery should have been an earthquake in astronomy, but they kept being stubborn.
With the right electrical input, Jupiter (the Sky Father) could light up in former glory.
#physics
@EuropeanTribalism
#PHYSICS
🫧"Mehrli maktab" da fizika fanini o'qitish, avvalambor, o'quvchilarni zamonaviy fizika yutuqlari bilan tanishtirishni, hamda o'quvchilar ongida tabiiy -ilmiy dunyoqarashni shakllantirishni taqozo qiladi.
🌊Fizika tabiatdagi hodisa va voqealarni hamda ularning qonuniyatlarini o'rganuvchi fandir.
"Mehrli maktab " da fizika fanini o'qitishda yangi shakl va uslublarini faol joriy etish ham maqsadga muvofiqdir.
🌈Shu maqsadda o'quv jarayonida zamonaviy AKTdan foydalanish samarali natija bermoqda. O'quv mashg'ulotlar davomida "Birligini top!", "Xotira mashqi", "Olimlar gulshani", "Kamalak ranglari", "Formula daraxti", "Kashfiyotlar shahri" metodlaridan foydalanib darslar tashkil etiladi.
Instagram
Facebook
Twitter
Thor still thunderous. (Current NASA footage.)
Any more proof needed that the nature of the universe is electrical?
Our ancient gods are still out there.
It's crucial to understand mythology to accept this fact.
#physics
@EuropeanTribalism
https://youtu.be/iJfw6lDlTuA?list=PL701CD168D02FF56F
关于理论物理学的入门级视频,The Theoretical Minimum 系列(理论物理的最低理解要求)。由 Leonard Susskind 授课,理论物理学家,弦理论(String theory)早期几个先驱之一,曾是一名水管工。
对于拓宽知识和丰富体验,纪录片和教学视频都很不错。这个视频系列对理论物理学的入门吸收和拓展也刚好。之前 HN 网站还看到推荐的一个理论物理的博客学习 How to become a GOOD Theoretical Physicist ,也可以关注。迷人的“闻道”之旅。#physics
On the mysterious handbags of the ancients
Although I do not agree with the Thunderbolts people in every detail, they have great ideas and explanations for a lot of things.
They recently released a video, explaining what the mysterious "Handbag of the Gods" might actually be. This handbag can be found all around the globe in ancient reliefs with no connecting culture.
In short: it is a representation of an extreme electrical discharge event, seen as titanic storm.
Watch the video! It also explains to some degree, why we see severe weather conditions and earthquakes.
#physics#mythology
https://www.youtube.com/watch?v=a8C2OdSbw84
On friar Georges Lemaitre
Friar Georges Lemaitre, a Belgian priest and astrophysicist, published a paper in 1927 in the Annals of the Scientific Society of Brussel that first presented the idea of an expanding cosmos. In 1931, Lemaitre proposed what later became known as the 🔗Big Bang theory of the origin of the universe.
The Catholic Church honoured Lemaitre's work: he was elected to the Pontificial Academy of Sciences (sic!) in 1936 and named prelate in 1960.
By contrast, in 1948, astronomers in the atheist Soviet Union were urged to condemn the Big Bang as a reactionary theory helping clericalism, a hostility shared by many scientists and philosophers until the 1960s.
Besides showing the compatibility of faith and science, the case of Lemaitre illustrates the way in which minds and cultures shaped by the belief that (the Abrahamic) God is a Trinity of reason and love have proved fruitful in perceiving order in the universe.
Moreover, it is arguable that belief in (the Abrahamic) God who is beyond creation has freed us to theorise about the causation and change of the cosmos as a whole, rather than simply accepting the totality of material reality as an eternal, unchanging given.
#physics#history
@EuropeanTribalism
On the celestial mechanics and the past of the Solar system
A follower of this channel pointed out a video I want to share with you. It contains a brief summary of how the mechanics of the Solar system work and explain on point what this channel tells you about mythology.
Please watch and share, this video solves everything you need to know:
https://www.youtube.com/watch?v=8RtGal_-KXU
#physics#mythology#history
@EuropeanTribalism
Mulugeta Bekele: the jailed and tortured scientist who kept #Ethiopian#physics alive
Mulugeta Bekele paid a heavy price for remaining in #Ethiopia in the 1970s and 1980s. While many other academics had fled their homeland to avoid being targeted by its military rulers, Mulugeta did not.
He stayed to teach #physics, almost single-handedly keeping it alive in the country. But Mulugeta was arrested and brutally tortured by members of the #Derg, Ethiopia’s ruling military junta. “I still have scars,” he says when we meet at his tiny, second-floor office at Addis Ababa University (AAU) in January 2026.
Gentle and softly spoken, Mulugeta, 79, is formally retired but still active as a research physicist. In 2012 his efforts led to him being awarded the Sakharov prize by the American Physical Society (APS) “for his tireless efforts in defence of human rights and freedom of expression and education....
https://physicsworld.com/a/mulugeta-bekele-the-jailed-and-tortured-scientist-who-kept-ethiopian-physics-alive/