Η ΓΝΩΣΗ ΤΗΣ ΣΤΟ ΣΧΟΛΕΙΟ ΚΑΙ ΠΕΡΑ ΑΠΟ ΑΥΤΟ
An insulin that switches itself on and off in response to blood glucose levels has proven successful in lowering the risk of dangerously low glucose levels, or hypos, in animals. According to researchers, the drug holds great promise for the tens of millions of insulin-requiring diabetics worldwide.
Category: Body & Mind
Tags: Diabetes, Insulin, hypoglycemia, blood-glucose
Slow Wi-Fi is a modern bugbear for many people, but thankfully we might soon be cranking those speeds up. Scientists at University College London (UCL) have set a new world record in wireless data transmission speeds, sending a blistering 938 Gigabits per second (Gbps) over the air through a combo of radio and light technology.
Category: Telecommunications, Technology
Tags: Wireless, Data, Transmission, University College London, Radio, Light, Wifi, Wi-Fi, 5G, Cellular
The Toyota Research Institute has been doing some incredible work teaching robots to rapidly learn and perform tasks autonomously – now, it's bringing its Large Behavior Model tech to the extraordinary Atlas humanoid in partnership with Boston Dynamics.
Category: AI & Humanoids, Technology
Tags: Robots, Artificial Intelligence, Machine Learning, Boston Dynamics, Toyota Research Institute, LLM (Large Language Model)
A tiny chip with a unique surface can accurately detect the blood biomarkers of a heart attack within minutes, a fraction of the time taken by current methods, even if they’re at very low concentrations. The researchers behind the device see it being used as an at-home diagnostic tool.
Category: Science
Tags: Biomarkers, Heart attack, Chip, metasurface, Johns Hopkins University
Lockheed Martin's famous-yet-secret Skunk Works is conducting live flight tests of its Smart Adaptive Flight Control Environment (SAFE) autonomous AI system on the X-62A. The system can be reconfigured in real time while the X-plane is still in the air.
Category: Military, Technology
Tags: Aircraft, Lockheed Martin, US Air Force, Autonomous flight
Following a concept world premiere in 2022 and a track demo at Le Mans a couple months ago, the Alpine Alpenglow is back, this time serving as a spectacular highlight of the 2024 Paris Motor Show. Alpine has equipped the latest Alpenglow with an all-new "Hy6" twin-turbo V6 engine developed from the ground up to run on hydrogen. The Hy6 doubles the power of the last Alpenglow so the new car not only looks like an extreme track-only supercar, it performs and sounds like one, too.
Category: Automotive, Transport
Tags: Hydrogen-powered, hydrogen-engine, Alpine, Supercar, paris-motor-show-2024, Motorsport, Endurance Racing, Engine Technologies
My family spent a week with the Taxa Outdoors Woolly Bear Overland camp trailer, and we loved it. Camp trailers like this are an off-road-ready camping option with a lot of storage, organization, and other useful features.
Tags: Camping, overland expo west 2024, Taxa, trailers, Reviews
Vibration-absorbing, sound-damping materials such as sheets of rubber and expanded foam tend to be thick, bulky and soft. A new material is a big exception to that tendency, however, as it absorbs vibrations while staying stiff and thin.
Tags: ETH Zurich, Sound, vibration, Glass
The last time we checked in at Serve Robotics, the Uber-backed company had partnered with Alphabet's Wing for a robot-to-drone delivery service in Dallas. That was with Serve's Gen2 bot, but a faster, smarter and more robust model has just launched.
Category: Technology
Tags: Delivery robots, Robots, Cargo
In what it calls "the world's first corporate agreement to purchase nuclear energy from multiple small modular reactors," Google has taken another step toward its goal of achieving net-zero emissions from its operational chain by 2030.
Category: Energy, Technology
Tags: Nuclear, Power, Reactors, US Department of Energy, Data Center, Google
MAD Architects has completed work on an amazing new residential building. Located in Colorado, it draws inspiration from the surrounding landscape and is defined by a facade that's cracked open to reveal a "Canyon" area that lets residents take a stroll along a mountain trail.
Category: Architecture, Lifestyle
Tags: MAD Architects, Building and Construction, Building Facades, High-rise, Residential towers
Battery tech firm ProLogium has taken the wraps off its 100% silicon composite anode battery. Highlighting its potential for use in EVs at the ongoing Paris Motor Show, the Taiwanese company claimed a major leap in energy density and charging efficiency, promising 186 miles (300 km) of range from a five-minute charge.
Category: Automotive, Transport
Tags: Battery, Battery+Electric+Vehicle, Battery Electric Vehicles, Battery Technology
As part of DPReview's 25th anniversary celebration, we're looking back at some of the more significant cameras to come along over the past 25 years, and today, we're highlighting the camera that led the 4K revolution in consumer cameras: the Panasonic GH4. Officially announced in early 2014, we published our GH4 review on October 16, 2014 – ten years ago today.
We've all become so used to 4K video that it no longer registers as unique. It's found on virtually every mirrorless camera made today, smartphones, action cameras, miniature gimbal cameras, webcams, security cameras, and even those wacky $100 'pro' video cameras you see on Amazon and wonder who buys them.
But, of course, it wasn't always that way, and we have the GH4 – the first mirrorless camera to capture 4K video internally – to thank for opening the metaphorical floodgates and ushering in the 4K era.
I had a personal interest in the GH4: as someone who had adopted the GH line early on for video projects, I was as curious as anyone to know how it stacked up. Although I was on staff at DPReview, I wasn't involved in writing the GH4 review and probably read it with as much anticipation as anyone else.
Photo: DPReview staffIt's worth remembering that the GH4 was a hybrid camera designed to appeal to both stills and video shooters, and it had features to appeal to those who wanted to do both. Like the GH3, the camera was built around a 16MP sensor, but it supported 12fps burst shooting (7.5fps with focus tracking), a 1/8000 shutter speed and 1/250th flash sync. It even had a rather lovely 2.36M-dot OLED viewfinder.
But realistically, nobody was buying a GH4 just to shoot stills. You bought it because you wanted a solid video camera that could shoot stills when needed.
"Realistically, nobody was buying a GH4 just to shoot stills."The GH4 could capture 4K video at up to UHD 4K/30p (3840x2160) or DCI 4K/24p (4096x2160) internally and supported both Long GOP and All-I codecs at bit rates up to 200Mbps. Although we take bit rates like this for granted today, this was very high at the time. The camera also produced pleasing 1080p video, though as we called out in our review, its HD video wasn't as good as the perfectly oversampled 1080p video from the Sony a7s.
Despite the impressive specs and beautiful video to match, we had some nitpicks. To start, 4K video captured internally only had 8-bit 4:2:0 color, providing less flexibility for color grading in post. (10-bit 4:2:2 color was supported, but only when recording externally.) Additionally, the GH4's sensor was 4608 pixels wide, requiring the camera to use a smaller, native crop of the sensor when shooting 4K. This resulted in a 1.1x crop for DCI 4K and a 1.2x crop for UHD 4K.
Equally as crucial as its video specs, the GH4 illustrated Panasonic's commitment to supporting a professional video workflow.
The camera included several now-common tools to improve the video shooting experience, including focus peaking, two zebra settings, control over Master Pedestal (black level) and luminance scale, and a 'cinema-like' gamma preset. It also allowed users to set the shutter speed and ISO as shutter angle and gain and could generate color bars for calibration. It was also possible to switch between capture frequencies, meaning the camera could support NTSC, PAL, and true 24fps cinema standards.
"Equally as crucial as its video specs, the GH4 illustrated Panasonic's commitment to supporting a professional video workflow."Alongside the camera, Panasonic released the optional DMW-YAGH interface unit. This $1999 accessory unit added two XLR inputs for audio, an SDI input for timecode, four 3D-SDI connectors capable of outputting 4:2:2 10-bit video and a 12V DC power socket. The unit attached to the bottom of the GH4 and felt oversized relative to the camera. Beginning with the GH5, the interface unit was phased out in favor of the DMW-XLR1, a much more affordable option in the style of the hotshoe-mounted XLR adapter we've become accustomed to today.
The GH4 was also the camera Panasonic used to debut its newest autofocus technology: Depth-from-Defocus, or DFD. DFD attempted to build a depth map of a scene by making tiny focus adjustments and analyzing changes in the image. With an understanding of the out-of-focus characteristics of a particular lens, the camera could build a depth map of the scene.
The optional DMW-YAGH 'Interface Unit' provided a more extensive selection of video industry connectors for using the GH4 as part of a high-end video rig.However promising the technology may have been, DFD never quite met expectations. Panasonic really wanted to make it work, and it's possible that, given fast enough sampling and processing, it might have continued to improve. Unfortunately for Panasonic, cameras using phase-detect autofocus consistently provided a better AF experience, particularly when shooting video, and the company eventually made the jump to phase-detection with the Lumix S5II in 2023, finally arriving in the GH series on the GH7 in 2024.
In our review of the GH4, we found a lot to like and a few frustrations. For example, despite having an autoexposure compensation dial, the camera didn't allow you to use it when using Auto ISO in manual exposure mode, and there was no Auto ISO option when shooting video in M mode. Overall, though, we were mighty impressed and saved our biggest praise for the camera's video capabilities:
"The GH4 was also the camera Panasonic used to debut its newest autofocus technology: Depth-from-Defocus, or DFD.""It's in terms of video that the GH4 really stands out. It produces some of the best video we've yet seen - losing out only to the Sony a7S's moiré-free 1080 output. The ability to capture good quality 4K, whether for use at full resolution, downsampling to 1080 or cropping to 1080, adds real flexibility to the camera. Low light performance is solid if not exceptional," we concluded.
The GH4 landed in the retail market at a price of $1699, or about $2260 today adjusted for inflation, which isn't far off the $2199 price of the GH7. It's amazing to think about how expectations for video have changed over the years. However, the GH7 has its work cut out for it: rather than being an obvious standout in the crowd, it has to compete in a marketplace of cameras brimming with video features. Maybe in another ten years, we'll look back to see how it held up.
The Fujifilm X-M5 is the company's latest APS-C mirrorless camera. Although it comes in at the budget end of the spectrum and is aimed at vloggers, it's also a great compact camera for still photography.
The X-M5 uses Fujifilm's previous generation 26MP X-Trans sensor – which is a good thing. That's the same sensor found inside cameras like the X100V, X-T4, and the X-Pro3, all cameras capable of delivering excellent image quality. Unlike some compact models and vlog cameras, it also includes twin control dials for easy operation and a fully mechanical shutter.
Our sample gallery includes photos shot with several lenses, including the camera's XC 15-45mm F3.5-5.6 OIS PZ kit lens. Take a look and let us know what you think.
Click here to see our Fujifilm X-M5 sample gallery
Buy now:
$799 at B&H Photo$899 w/ 15-45 at Amazon.com$799 at AdoramaThough streaming accounts for much of our music consumption these days, vinyl records have been rising in popularity over the last few years. If you want your latest purchase to stand out while playing, then why not have it stand up on the Fuse Audio GLD vertical turntable?
Category: Home Entertainment, Consumer Tech, Technology
Tags: Kickstarter, Turntables, Vinyl, Records
In a much-needed update to 2003 data on attention-deficit/hyperactivity disorder (ADHD), a new report from the National Center for Health Statistics (NCHS) has found that an estimated 15.5 million US adults are living with the condition – and many are being let down by poor access to treatment.
Category: ADHD & Autism, Brain Health, Body & Mind
Tags: CDC, ADHD, mental health, Medication, FDA, Drug
The prospect of virtually unlimited clean geothermal power is now substantially brighter. EPFL’s Laboratory of Experimental Rock Mechanics (LEMR) has shown that the semi-plastic, gooey rock at supercritical depths can still be fractured to let water through.
Category: Energy, Technology
Tags: EPFL, Geothermal, Clean Energy, Renewable Energy
By obtaining high-resolution images of Alzheimer’s disease-affected brain cells as the condition progresses, researchers have identified the specific neurons that are damaged. The information the ‘cell atlas’ provides highlights potential new treatment targets.
Category: Alzheimer's & Dementia, Brain Health, Body & Mind
Tags: Alzheimer's disease, neurons, Treatment, Allen Institute for Brain Science
Two great minds in permanent-magnet-free motor design are fusing their know-how to create an even more capable inductive electric motor. Mahle and Valeo have teamed up to introduce what they call the Inner Brushless Electrical Excitation (iBEE) system, a form of e-machine that eliminates the need for sensitive rare earths, promises powerful performance and sends lifecycle carbon emissions right off a tall, steep cliff.
Category: Automotive, Transport
Tags: Electric Motors, Mahle, Electric Vehicles, Magnetism, Magnetic
A new review has highlighted how skin tone can affect the safety and effectiveness of some medications and why the current way we run clinical drug trials needs to change to include more historically underrepresented populations.
Category: Body & Mind
Tags: Skin, diversity, clinical trials, UC Riverside
