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»Cable companies Charter and Cox agree to merge« cnbc.com/2025/05/16/cable-riva… #media #socialmedia






Home-casting Thermoelectric Alloys


There are a number of metal cylinders displayed in a line. Each cylinder has a rectangular brass plate mounted to each end, and these brass plates stand upright, with the metal cylinders held horizontally between them.

If you want to convert heat into electrical power, it’s hard to find a simpler method than a thermoelectric generator. The Seebeck effect means that the junction of two dissimilar conductors will produce a voltage potential when heated, but the same effect also applies to certain alloys, even without a junction. [Simplifier] has been trying to find the best maker-friendly thermoelectric alloys, and recently shared the results of some extensive experimentation.

The experiments investigated a variety of bismuth alloys, and tried to determine the effects of adding lead, antimony, tin, and zinc. [Simplifier] mixed together each alloy in an electric furnace, cast it into a cylindrical mold, machined the resulting rod to a uniform length, and used tin-bismuth solder to connect each end to a brass electrode. To test each composition, one end of the cylinder was cooled with ice while the other was held in boiling water, then resistance was measured under this known temperature gradient. According to the Wiedemann-Franz law, this was enough information to approximate the metal’s thermal conductivity.

Armed with the necessary data, [Simplifier] was able to calculate each alloy’s thermoelectric efficiency coefficient. The results showed some useful information: antimony is a useful additive at about 5% by weight, tin and lead created relatively good thermoelectric materials with opposite polarities, and zinc was useful only to improve the mechanical properties at the expense of efficiency. Even in the best case, the thermoelectric efficiency didn’t exceed 6.9%, which is nonetheless quite respectable for a homemade material.

This project is a great deal more accessible for an amateur than previous thermoelectric material research we’ve covered, and a bit more efficient than another home project we’ve seen. If you just want to get straight to power generation, check out this project.


hackaday.com/2025/05/16/home-c…



Und die #Tagesschau spricht von "Gewalt bei Palästina-Demo", meint damit aber Gewalt gegen Polizisten, und fokussiert sich auf einen verletzten Polizisten. Die Monate Polizeigewalt gegenüber Palästina-Demonstranten in Berlin werden dabei mal eben ausgeblendet.
#Palästina #palestina #palestine #Völkermord #stopthegenocide #freepalestine #policebrutality #freespeech #Versammlungsfreiheit #meinungsfreiheit
instagram.com/reel/DJsOUepMYMm…



On the occasion of the UNESCO International Day of Light, we created a 'light painting' using the Dwingeloo Telescope by mounting a light bulb at the focus for half an hour.

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uhhh

i have just noticed this laptop's shell is slightly curved

and it causes inconsistent backlight (very noticeable in photos, less so irl)

is this normal or should i pursue RMA

#duckduckfedi #hardware #repair

in reply to MOVED TO @halva@mk.absturztau.be

Sorry, I couldn't process this image.

The image shows a Lenovo laptop lying on a wooden table. The laptop is positioned with its side facing the camera, allowing a clear view of its ports. From left to right, the ports visible are an HDMI port, a USB-C port, and a headphone jack. The Lenovo logo is visible on the top left corner of the laptop's lid. The background is slightly blurred, showing a conference room setting with a table and some office equipment. The lighting is soft, suggesting natural light coming from a window.

The image shows a laptop screen displaying the Google homepage. The screen is open to a web browser with the URL "google.com/webhp?hl=ru" visible in the address bar. The Google logo is prominently displayed in its characteristic colors: blue, red, yellow, and green. Below the logo, there is a search bar with a microphone icon on the right, indicating voice search functionality. The text "Google Search" and "I'm Feeling Lucky" are visible beneath the search bar. The bottom of the screen shows a navigation bar with links to "About," "Advertising," "Business," and "How Search works." The laptop is placed on a wooden surface, and the background suggests an indoor setting with tables and chairs, possibly a café or a library. The time displayed in the bottom right corner is 5:17 PM.

Provided by @altbot, generated privately and locally using Ovis2-8B

🌱 Energy used: 0.537 Wh





I like this new feature on the Mastodon web-based front-end application — where, when you look at the someone else's profile, Mastodon shows you (some of the people) who follows this account that you also follow.

Although, I wish there was way that I could see the complete list of people — rather than just 2 or 3 people.

#DeSo #Fediverse #Mastodon



Right now, Mariotti conducts #Brahms and #Dvorák's Eighth in #Stuttgart worldconcerthall.com/en/schedu… #wch


Il New York Times ha esaminato video, audio, testimonianze e rapporti delle autopsie, mostrando che i soldati hanno sparato per circa sei minuti contro degli operatori disarmati che non rappresentavano una minaccia.

Come gli israeliani hanno mass...




Se nel 2005, quando facevo le medie, mi avessero detto che vent'anni dopo in un libro di Storia a scuola ci avrei trovato questo...


:: Lo spreco della vita si trova nell’amore che non si è saputo dare, nel potere che non si è saputo utilizzare, nell'egoistica prudenza che ci ha impedito di rischiare e che, evitandoci un dispiacere, ci ha fatto mancare la felicità.

_ O.Wilde _





3 Surprisingly Simple Tricks for Deescalating And Preventing Toddler Tantrums
https://www.huffpost.com/entry/toddler-tantrums-speech-pathologist-advice_l_68111524e4b0188fc5dab6b0?utm_source=flipboard&utm_medium=activitypub

Posted into Parenting @parenting-huffingtonpost



It's concerning to me that this """ethical dilemma""" comes up so frequently regarding self-driving cars. Does self-driving mean *never slows or stops*? Are self-driving cars all designed after the bus in Speed?

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❤️ 👁 - „Praktisch alle Probleme, die Sie heute hier beschrieben haben, Herr Dobrindt, die Sie die letzten dreieinhalb Jahre benutzt haben, um dieses Land hier schlechtzureden, sind Probleme, die Sie jetzt von sich selbst geerbt haben.“ - Konstantin von Notz erinnert Alexander Dobrindt daran, welche Parteien in den letzten 20 Jahren die Innenminister gestellt haben:

☑️ ☑️ ☑️

Questa voce è stata modificata (5 mesi fa)





People With Asthma And Allergies Share The Air Purifiers That 'Actually Make A Difference'
https://www.huffpost.com/entry/air-purifier-asthma-allergies-ud_l_68239855e4b0abb5835987e2?utm_source=flipboard&utm_medium=activitypub

Posted into News & Politics @news-politics-huffingtonpost



»Harvard’s Still A Startup Heavyweight« news.crunchbase.com/startups/h… #Pirates #Tech #Startup #News


»Micro-Automations: The Quiet AI Revolution« news.crunchbase.com/ai/micro-a… #Pirates #Tech #Startup #News


📚 How can university libraries protect researchers from predatory journals?

At the national seminar on displaced university libraries, I presented a framework for creating local white lists of journals — not as a tool of restriction, but as a way to guide and support responsible publishing.

🛡️ VACUP criteria
📑 Journal screening tools
🌍 Nordic best practices
⚠️ How to spot red flags

📥 Full presentation: dx.doi.org/10.13140/RG.2.2.338…

#AcademicPublishing #ResearchIntegrity #OpenScience






Wann es wohl einen schnellen Roboter für den Haushalt gibt? 😳

Ein neuer Guinness-Rekord wurde aufgestellt! 🎉 Ein Team von Studierenden der Purdue University hat mit ihrem Roboter "Purdubik’s Cube" den Rubik's Cube in sensationellen 0,103 Sekunden gelöst.

Zum Artikel: heise.de/-10385567




We’re excited to introduce our Google Summer of Code 2025 contributors!

These amazing folks will be working on impactful projects that will shape Django’s future.

Meet the contributors 👇

🧵 (1/5)
#Django #GSoC2025 #OpenSource #Python

Paolo Melchiorre reshared this.




Texas Lawmakers Push to Enforce Election Transparency Law After Newsrooms Found School Districts Failed to Comply

propublica.org/article/texas-l…

#Politics