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Category: transportation

In recent years, researchers have been trying to develop increasingly advanced battery technologies that can be charged faster and store more energy, while also remaining safe and stable over time. Lithium-metal batteries (LMBs), which contain a lithium-metal-based anode, have been found to be promising alternatives to lithium-ion batteries (LiBs), which are currently the most widely used rechargeable batteries.

A key advantage of LMBs is that they can store significantly more energy than LiBs, which could be advantageous for and other large or advanced electronics. Despite their potential, these batteries have so far proved to be less stable and safe than LiBs, while also charging relatively slowly; limitations that have so far prevented their widespread adoption.

A research team at the Korea Advanced Institute of Science and Technology (KAIST) and other institutes recently designed new based on symmetric organic salts, which could help to boost the performance of LMBs. Their newly designed electrolytes, introduced in a paper in Nature Energy, were found to improve the stability and charging speed of LMBs, preventing the formation of dendrites (lithium deposits that cause a battery’s performance to decline over time).

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People in Japan are remembering the victims of the sarin gas attack on the Tokyo subway system on the 30th anniversary of the deadly incident on Thursday.

Members of the Aum Shinrikyo cult released highly toxic nerve gas in packed rush-hour subway cars on three lines in central Tokyo on March 20, 1995. Fourteen people died and about 6,300 others were injured.

At Kasumigaseki subway station, staff observed a moment of silence at around 8 a.m., almost the exact time of the attack.

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Increasing energy demands and problems associated with burning fossil fuels have heightened interest in more sustainable energy sources, such as sunlight. But there are still areas where carbon-based fuel remains the standard, such as in the aviation industry. To address this need, scientists have been working to devise a way to use sunlight to generate solar-thermal heating that could then drive the chemical reactions that are needed to make jet fuel with net-zero carbon emissions.

Now, a team at Caltech that is part of a Department of Energy (DOE) Energy Innovation Hub known as the Liquid Sunlight Alliance, or LiSA, has developed such a solar-thermal heating system on a small scale and demonstrated that it can successfully drive an important reaction for jet fuel production.

Completely powered by solar energy, the so-called photothermocatalytic reactor incorporates a spectrally selective solar absorber to maximize the generation of solar-thermal heating. The modular design of the reactor takes advantage of current fabrication technologies and existing silicon solar panel production infrastructure.

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Artificial Intelligence (AI) has made significant strides in recent years, transforming various aspects of our lives. From self-driving cars to personalized recommendations on streaming platforms, AI has become an integral part of our daily existence. However, the fear that AI will replace humans entirely is unfounded. Instead, a more nuanced perspective emerges: AI will augment human capabilities, leading to the emergence of “AI-powered humans.”

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A research team at UNIST has identified the causes of oxygen generation in a novel cathode material called quasi-lithium and proposed a material design principle to address this issue.

Quasi-lithium materials theoretically enable batteries to store 30% to 70% more energy compared to existing technologies through high-voltage charging of over 4.5V. This advancement could allow to achieve a of up to 1,000 km on a single charge. However, during the high-voltage charging process, oxygen trapped inside the material can oxidize and be released as gas, posing a significant explosion risk.

The research team, led by Professor Hyun-Wook Lee in the School of Energy and Chemical Engineering, discovered that oxygen oxidizes near 4.25V, causing partial structural deformation and gas release.

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Structural adhesives play a crucial role in assembling automobiles, aircraft, and buildings. Among these, epoxy adhesives stand out for their exceptional mechanical strength and durability. However, traditional cured epoxy resins are often rigid and lack flexibility, resulting in low peel and impact strength.

Now, a groundbreaking advancement in structural adhesives has emerged from the laboratories of Nagoya University, promising to transform material bonding as we know it. This next-generation adhesive boasts an unprecedented impact strength – 22 times higher than conventional epoxy-based adhesives without rubbery additives.

New adhesive using elastomer makes lighter, more carbon-efficient vehicles possible.

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Scientists are urging people who live in southcentral Alaska to begin preparing for a possible eruption of the Mount Spurr volcano.

The Alaska Volcano Observatory said now is a good time for Alaskans to “familiarize themselves with the possible hazards of a Spurr eruption” following last week’s announcement that the likelihood of an eruption has increased.

“The major hazards to Alaska residents from Spurr would be from ash risk to aviation and possible ashfall,” the observatory said in a Wednesday post on X.

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To understand exactly what’s going on, we need to back up a bit. Roughly put, building a machine-learning model involves training it on a large number of examples and then testing it on a bunch of similar examples that it has not yet seen. When the model passes the test, you’re done.

What the Google researchers point out is that this bar is too low. The training process can produce many different models that all pass the test but—and this is the crucial part—these models will differ in small, arbitrary ways, depending on things like the random values given to the nodes in a neural network before training starts, the way training data is selected or represented, the number of training runs, and so on. These small, often random, differences are typically overlooked if they don’t affect how a model does on the test. But it turns out they can lead to huge variation in performance in the real world.

In other words, the process used to build most machine-learning models today cannot tell which models will work in the real world and which ones won’t.

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Mark Rober’s Tesla crash story and video on self-driving cars face significant scrutiny for authenticity, bias, and misleading claims, raising doubts about his testing methods and the reliability of the technology he promotes.

Questions to inspire discussion.

Tesla Autopilot and Testing 🚗 Q: What was the main criticism of Mark Rober’s Tesla crash video? A: The video was criticized for failing to use full self-driving mode despite it being shown in the thumbnail and capable of being activated the same way as autopilot. 🔍 Q: How did Mark Rober respond to the criticism about not using full self-driving mode? A: Mark claimed it was a distinction without a difference and was confident the results would be the same if he reran the experiment in full self-driving mode. 🛑 Q: What might have caused the autopilot to disengage during the test?

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