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Mar 25, 2024

Inside Nvidia HQ: Here’s What a $2 Trillion Company’s Office Looks Like

Posted by in categories: robotics/AI, space travel

Nvidia’s headquarters is now one of the most sought-after places to work. Spanning more than 1 million square feet combined, Nvidia’s space-ship-like buildings were designed with help from custom software powered by the AI chips that have made the company successful. WSJ gets a look inside. Photo: Nvidia.

Mar 25, 2024

It’s not just you: ChatGPT is down for many worldwide

Posted by in category: robotics/AI

Update added to the bottom of the article.

OpenAI’s ChatGPT is down for many people worldwide, with users facing multiple problems, including being unable to access their accounts, having their chat history come up empty, and the chat screens not loading properly.

When accessing ChatGPT, users may see a blank screen with “How can I help you today?” and, in some cases, a missing chat history.

Mar 25, 2024

Research team develops important building block for artificial cells

Posted by in categories: bioengineering, biotech/medical, nanotechnology

During cell division, a ring forms around the cell equator, which contracts to divide the cell into two daughter cells. Together with researchers from Heidelberg, Dresden, Tübingen and Harvard, Professor Jan Kierfeld and Lukas Weise from the Department of Physics at TU Dortmund University have succeeded for the first time in synthesizing such a contractile ring with the help of DNA nanotechnology and to uncover its contraction mechanism.

The results have been published in the journal Nature Communications (“Triggered contraction of self-assembled micron-scale DNA nanotube rings”).

In synthetic biology, researchers try to recreate crucial mechanisms of life in vitro, such as cell division. The aim is to be able to synthesize minimal cells. The research team led by Professor Kerstin Göpfrich from Heidelberg University has now synthetically reproduced contractile rings for cell division using polymer rings composed of DNA nanotubes.

Mar 25, 2024

The Best Qubits for Quantum Computing Might Just Be Atoms

Posted by in categories: computing, particle physics, quantum physics

In the search for the most scalable hardware to use for quantum computers, qubits made of individual atoms are having a breakout moment.

Mar 25, 2024

Translation software enables efficient DNA data storage

Posted by in categories: biotech/medical, computing, genetics

In support of a major collaborative project to store massive amounts of data in DNA molecules, a Los Alamos National Laboratory–led team has developed a key enabling technology that translates digital binary files into the four-letter genetic alphabet needed for molecular storage.

“Our software, the Adaptive DNA Storage Codec (ADS Codex), translates data files from what a computer understands into what biology understands,” said Latchesar Ionkov, a computer scientist at Los Alamos and principal investigator on the project. “It’s like translating from English to Chinese, only harder.”

DNA offers a compact way to store huge amounts of data cost-effectively. Los Alamos National Laboratory has developed ADS Codex to translate the 0s and 1s of digital computer files into the four-letter code of DNA.

Mar 25, 2024

Researchers develop new single-molecule transistor that uses quantum interference

Posted by in categories: computing, nanotechnology, quantum physics, space travel

An international team of researchers from Queen Mary University of London, the University of Oxford, Lancaster University, and the University of Waterloo have developed a new single-molecule transistor that uses quantum interference to control the flow of electrons. The transistor, which is described in a paper published in the Nature Nanotechnology (“Quantum interference enhances the performance of single-molecule transistors”), opens new possibilities for using quantum effects in electronic devices.

Transistor are the basic building blocks of modern electronics. They are used to amplify and switch electrical signals, and they are essential for everything from smartphones to spaceships. However, the traditional method of making transistors, which involves etching silicon into tiny channels, is reaching its limits.

As transistors get smaller, they become increasingly inefficient and susceptible to errors, as electrons can leak through the device even when it is supposed to be switched off, by a process known as quantum tunnelling. Researchers are exploring new types of switching mechanisms that can be used with different materials to remove this effect.

Mar 25, 2024

Quantum interference enhances the performance of single-molecule transistors

Posted by in categories: computing, quantum physics

An experimental demonstration of how destructive quantum interference effects can increase the performance of single-molecule field-effect transistors to reach levels similar to those of nanoelectronic transistors.

Mar 25, 2024

Carbon nanotubes — what they are, how they are made, what they are used for

Posted by in categories: chemistry, nanotechnology, particle physics

Carbon nanotubes are cylindrical molecules that consist of rolled-up sheets of single-layer carbon atoms (graphene); they possess unique properties like high aspect ratio, mechanical strength, electrical and thermal conductivity, chemical stability, and a tip-surface area near the theoretical limit. They are one of the strongest materials known to man.

Mar 25, 2024

World’s first N-channel diamond field-effect transistor

Posted by in categories: computing, electronics

A NIMS research team has developed the world’s first n-channel diamond MOSFET (metal-oxide-semiconductor field-effect transistor). The developed n-channel diamond MOSFET provides a key step toward CMOS (complementary metal-oxide-semiconductor: one of the most popular technologies in the computer chip) integrated circuits for harsh-environment-applications as well as the development of diamond power electronics.

This research was published in Advanced Science (“High-temperature and high-electron mobility metal-oxide-semiconductor field-effect transistors based on n-type diamond”).

World’s First N-Channel Diamond Field-Effect Transistor: (Left) Atomic force microscope image of diamond epilayer surface morphology. (Middle) Optical microscope image of the diamond MOSFET. (Right) Performance of the MOSFET measured at 300 °C. The drain current increased when the gate voltage (Vg) was increased from −20 V (indicated by a black line) to 10 V (indicated by a yellow line). (Image: NIMS)

Mar 25, 2024

MEMS Explained – A Comprehensive Guide to Microelectromechanical Systems

Posted by in categories: biotech/medical, military

In the mid-1990’s, MEMS emerged in industrial manufacturing in a major way and MEMS components began appearing in numerous commercial products and applications including force sensors used to control brake deployment in vehicles, blood pressure sensors, inkjet printer heads, miniature analytical instruments, fiber-optic network components, air-and spacecraft control and of course military applications like surveillance and munitions guidance.

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