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El incendio de un camión Tesla Semi requirió 50.000 galones de agua para apagarlo

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Los bomberos de California necesitaron rociar 50.000 galones de agua para extinguir un incendio en la carretera Semirremolque Tesla La Junta Nacional de Seguridad en el Transporte (NTSB) de EE.UU. anunció en su informe que se había producido un incendio Informe preliminarLas tripulaciones también utilizaron un avión para arrojar materiales de extinción de incendios en las “inmediaciones como medida de precaución”, según la agencia.

El accidente ocurrió a las 3:13 a.m. del 19 de agosto en la I80 al este de Sacramento. El camión se salió de la carretera al tomar una curva, chocó contra una señal de tráfico y finalmente chocó contra un árbol. El conductor no resultó herido pero fue trasladado a un hospital por precaución.

El incendio de un camión Tesla Semi requirió 50.000 galones de agua para apagarloEl incendio de un camión Tesla Semi requirió 50.000 galones de agua para apagarlo

Patrulla de Caminos de California

La gran batería de 900 kilovatios-hora del Tesla Semi se incendió y alcanzó temperaturas de 1.000 grados Fahrenheit mientras emitía vapores tóxicos. Continuó ardiendo hasta última hora de la tarde mientras los bomberos lo rociaban con agua para enfriarlo (Tesla envió a un experto técnico para evaluar los riesgos de alto voltaje y la seguridad contra incendios). La carretera no fue reabierta hasta las 19.20 horas (más de 16 horas después del accidente).

Todo esto llamó la atención de la Junta Nacional de Seguridad en el Transporte, que… enviar un equipo Los investigadores han estado investigando el asunto, principalmente para examinar los riesgos de incendio que plantean los grandes paquetes de baterías de iones de litio. La agencia, que sólo puede hacer recomendaciones de seguridad y no tiene autoridad para hacer cumplir la ley, dijo que “todos los aspectos del accidente permanecen bajo investigación mientras la Junta Nacional de Seguridad en el Transporte determina la causa probable”.

Dado el largo período de cierre de carreteras, el peligroso incendio y los vapores tóxicos, es probable que el incidente provoque muchas discusiones dentro y fuera del gobierno. Se completó en 2021. Los incendios de baterías representan un peligro para los servicios de emergencia y la orientación de los fabricantes sobre dichos incendios es inadecuada.

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Computers

KitchenAid Semi Automatic Espresso Machine Review: Quiet and Compact

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KitchenAid is a brand that’s had a place in every home kitchen I’ve ever had, even growing up. When I bought my own KitchenAid stand mixer for the first time after college, my apartment finally felt like a place where a grown-up lived. My affection for that stand mixer cannot be overstated, so naturally my ears perked up when KitchenAid announced it was revamping its espresso machine lineup.

There are three new fully automatic espresso machines: the KF8, KF7, and KF6. Then there’s the KitchenAid Semi Automatic Espresso Machine, plus a 2-in-1 with a built-in burr grinder. I love a good fully automatic espresso machine for its expedience and ease, but there’s a part of me that just craves the practiced ritual of brewing your own espresso at home. The first of these machines to make their way to my doorstep was the Semi Automatic, so here we are. Keep an eye out for my review of the automatics soon.

Considerate Counter Footprint

I’m a lifelong apartment-dweller, and one of the many lessons I’ve learned from a life spent apartment-hopping is the value of counter space. When I set the KitchenAid Semi Automatic Espresso Machine on my counter for the first time, I couldn’t help but smile.

This is a fully-featured espresso machine with a built-in burr grinder, and it fits in the area previously occupied by my rice cooker—a strip of counter too narrow for other practical uses. This machine is narrow, clocking in at about 13 inches wide and 15 inches tall. It fits comfortably, with room to spare, underneath my somewhat low-hanging kitchen cabinets.

Silver espresso machine on kitchen counter

Photograph: Jaina Grey

Because of the tight space in my kitchen, it’s sometimes hard to access the water tank on the back of espresso machines I test. Usually, I have to either wrestle to remove the tank and bring it to the faucet, or resign myself to filling it by carrying cup after cup from my sink to the machine. The KitchenAid Semi Automatic effortlessly navigates that little stumbling block by having wheels on the bottom. I can just pull the machine away from the wall, turn it sideways, and fully remove the water tank.

I initially worried the machine would be too slippery with wheels, making it hard to tighten the portafilter into place without the whole thing sliding all the time. Thankfully, the wheels are smooth but they do require a little muscle to move—a good thing. To twist the portafilter in place, you still have to brace it with one hand, but you typically have to do that with small espresso machines anyway.

The wheels also make it so much easier to clean under and behind the machine. I’m currently testing another espresso machine on my other countertop, and it’s so heavy that moving it to clean up any spilled grounds or ultrafine coffee dust that’s accumulated behind the machine is a huge pain. A literal pain, given my chronic back issues.

Whisper Quiet

This KitchenAid machine features a certification from Quiet Mark, meaning it’s been tested to ensure it’s as quiet as possible (there’s a cute little Q sticker on the front of the machine). I was skeptical because even quiet grinders can get pretty loud. I was wrong. This Semi Automatic just might be the quietest espresso machine I’ve ever tested.

Grinding the beans produces only a little mechanical whirr sound. It’s quiet enough that you can continue to have a conversation while it grinds—a test every other grinder that’s come through my kitchen has failed, even the quiet ones. The grinder is also remarkably consistent. It produces grounds fine enough for espresso and coarse enough for other brewing methods. I think it can fully replace a countertop coffee grinder, no matter what kind of other coffee you like brewing.

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News

Complete PCIe 6.0 subsystem solution from Alphawave Semi & Keysight

Complete PCIe 6.0 subsystem solution

Alphawave Semi and Keysight Technologies have joined forces to create a cutting-edge solution for the latest PCIe 6.0 standard. This collaboration is a response to the growing need for faster data transfer rates, which are becoming increasingly important for the operation of sophisticated AI and high-performance computing systems. The new PCIe 6.0 standard is set to dramatically increase data transfer speeds to 64 gigatransfers per second, a notable jump from the previous version.

The partnership leverages Alphawave Semi’s expertise in PHY and Controller Device technology and Keysight’s Protocol Exerciser to achieve a significant breakthrough in data rate link negotiation. This is a crucial step for the implementation of PCIe 6.0. Alphawave Semi’s inclusion on the PCI-SIG 5.0 Integrators list emphasizes their dedication to adhering to rigorous industry standards, which is essential for the rapid adoption of the new technology.

One of the standout accomplishments of this collaboration is Alphawave Semi’s successful establishment of a CXL 2.0 link, which is a promising sign for future enhancements in data center efficiency. This is particularly relevant for the smooth operation of data centers, where cache coherency is a key factor.

PCIe 6

PCI Express (PCIe) 6.0 is the latest version of the PCI Express interface standard, which is widely used for high-speed data transfer in computers and servers. This version marks a significant advancement from its predecessor, PCIe 5.0, in several key areas:

  • Data Transfer Speed: PCIe 6.0 doubles the data transfer rate of PCIe 5.0, reaching up to 64 gigatransfers per second (GT/s) per lane. This translates to raw data rates of around 128 gigabytes per second (GB/s) in a x16 configuration, commonly used for graphics cards and high-end storage devices.
  • PAM4 Encoding: One of the most notable changes in PCIe 6.0 is the shift from Non-Return-to-Zero (NRZ) encoding to Pulse Amplitude Modulation with 4 levels (PAM4) signaling. PAM4 allows for more data to be transmitted with the same number of clock cycles by using four voltage levels instead of two, effectively doubling the bandwidth.
  • Forward Error Correction (FEC): PCIe 6.0 introduces Forward Error Correction, a significant enhancement for data integrity. FEC can detect and correct errors within the data stream, improving the reliability of high-speed data transfers, which is crucial for maintaining data integrity at higher speeds.
  • Low-Latency Flow Control Unit (FLIT): PCIe 6.0 uses a flow control unit called FLIT (Flow Control Unit-based encoding) to maintain low latency. FLIT-based encoding helps in managing the increased complexity of PAM4 signaling and FEC, ensuring that the latency doesn’t increase significantly despite the higher speeds and more complex encoding.
  • Backward Compatibility: Like its predecessors, PCIe 6.0 maintains backward compatibility with previous generations of PCIe. This means that devices designed for PCIe 6.0 can still operate with PCIe 5.0, 4.0, etc., hardware, albeit at the lower performance levels of the older generation.
  • Applications: The increased bandwidth and improved data integrity of PCIe 6.0 are particularly beneficial for applications that require high data throughput, such as data centers, artificial intelligence, machine learning, high-performance computing, and advanced networking systems.

PCIe 6.0 is an important development for future computing applications, offering significant improvements in speed and efficiency. Its adoption will likely be gradual, as it requires both hardware and software support to fully utilize its capabilities.

PCIe 6.0 Subsystem Solution

The role of test and measurement is crucial when introducing new technologies to ensure that products are interoperable and ready for widespread use. Keysight Technologies has pointed out the importance of PCIe in scaling AI and managing complex workloads. A significant technical shift in PCIe 6.0 is the move from NRZ signaling to Pulse Amplitude Modulation 4-level (PAM4). This change addresses challenges related to signal integrity and protocol, while also maintaining backward compatibility with previous PCIe generations. The introduction of Forward Error Correction (FEC) in FLIT-mode transactions is another key innovation, allowing PCIe 6.0 to handle higher bit error rates and ensure data integrity.

Alphawave Semi has showcased the effectiveness of FLIT-mode transactions on their PCIe 6.0 64 GT/s subsystem silicon, demonstrating the solution’s power efficiency, low latency, and reliability. Their PAM4 SerDes IP showcases their ability to provide leading-edge connectivity solutions.

Looking ahead, Alphawave Semi’s PCIe 6.0 Subsystem has the potential to support CXL 3.0, which could further enhance memory coherency in data centers and solidify the company’s position as a leader in high-speed connectivity for demanding computing environments. The joint efforts of Alphawave Semi and Keysight Technologies mark a pivotal step in the evolution of PCIe technology. This partnership is paving the way for a new era of high-speed connectivity that will be instrumental in driving forward the next generation of AI and high-performance computing developments.

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