Best laptops for college students: We’ve got an affordable laptop for every student. Best live TV streaming services: Ditch your cable company but keep the live channels and DVR. CNET may get a commission from retail offers. Share your voice $999 $210 at Best Buy 0 See it 10 Photos $155 at Google Express Turo is kind of like Uber meets Airbnb: You borrow someone’s car, but you do all the driving. I’ve used it many times and found it a great alternative to traditional car-rental services — in part because you get to choose exactly the vehicle you want (not just, say, “midsize”) and in part because you can often do pickup and dropoff right outside baggage claim.Between now and Sept. 1, the first 300 people to check out can get $30 off any Turo rental with promo code LDW30. Use promo code 19LABOR10 to get an unusually good deal on JBL’s interesting hybrid product — not quite headphones, and not quite a traditional speaker, but something you wear like neckphones to listen to music on the go. Formerly known as the Google Home Hub, Google’s Nest Hub packs a wealth of Google Assistant goodness into a 7-inch screen. At $59, this is within a buck of the best price we’ve seen. It lists for $129 and sells elsewhere in the $89-to-$99 range.This is one item of many available as part of eBay’s Labor Day Sale (which, at this writing, doesn’t specifically mention Labor Day, but that’s how it was pitched to us). See It Welcome to sewer hell. South West Water The fatberg menace continues to haunt the UK. South West Water, which services an area in southern England, discovered a fatberg clogging up the sewers in Devon, and it’s a whopper. Lenovo Smart Clock: $59.99 (save $20) Recently updated to include digital-photo-frame capabilities, the Lenovo Smart Clock brings Google Assistant goodness to your nightstand. It’s a little smaller than the Amazon Echo Show 5, but also a full $30 less (and tied with Prime Day pricing) during this Best Buy Labor Day sale. Though not technically a Labor Day sale, it’s happening during Labor Day sale season — and it’s too good not to share. Nationwide Distributors, via Google Express, has just about the best AirPods deal we’ve seen (when you apply promo code ZBEDWZ at checkout). This is for the second-gen AirPods with the wireless charging case. Can’t imagine these will last long at this price, so if you’re interested, act fast. Tags $999 Read the Rylo camera preview $6 at Tidal Chris Monroe/CNET Free Echo Dot with an Insignia or Toshiba TV (save $50) $299 at Amazon Sarah Tew/CNET Sarah Tew/CNET Spotify and most other streaming services rely on compressed audio, which robs the listener of full fidelity. Enter Tidal, the only “major” service that delivers lossless audio — meaning at least on par with CD quality, if not better. Want to see (er, hear) the difference for yourself? Grab this excellent extended trial while you can. It’s just $6 for three months, and it’s good for up to six listeners. What’s cooler: A snapshot of a firework exploding in front of you, or full 360-degree video of all the fireworks and all the reactions to seeing them? Oooh, ahhh, indeed. At $250, the compact Rylo dual-lens camera is selling for its lowest price yet. And for an extra $50, you can get the bundle that includes the waterproof housing.This deal runs through Sept. 3; it usually costs $500. JBL Soundgear wearable speaker: $90 (save $160) When fatbergs attack Review • iPhone XS review, updated: A few luxury upgrades over the XR $90 at Daily Steals via Google Express Apple AirPods with Wireless Charging Case: $155 (save $45) Random,I’m shocked — shocked! — to learn that stores are turning Labor Day into an excuse to sell stuff. Wait — no, I’m not. As much as I respect the original intent of the holiday (which became official back in 1894), to most of us, it’s just a bonus day off — one that’s blissfully tacked onto a weekend. So, yeah, stores; go ahead, run your sales. I’m listening. Perhaps unsurprisingly, Labor Day doesn’t bring out bargains to compete with the likes of Black Friday (which will be here before you know it), but there are definitely some sales worth your time.For example:We’ve rounded up the best Labor Day mattress deals.We’ve also gathered the best Labor Day laptop deals at Best Buy.The 2019 Vizio P Series Quantum is back under $999.Be sure to check out Amazon’s roughly three dozen Labor Day deals on TVs and audio. Google Express is having a big sale as well, one that includes deals on game consoles, AirPods, iPhones, laptops and more.Below I’ve rounded up a handful of individual items I consider to be the cream of the crop, followed by a handy reference guide to other Labor Day sales. Keep in mind, of course, that products may sell out at any time, even if the sale itself is still running. Note that CNET may get a share of revenue from the sale of the products featured on this page. $59 at eBay Read DJI Osmo Action preview $261 at Daily Steals via Google Express It will take a sewer team about eight weeks to remove the massive fatberg using high-pressure jets, shovels and pickaxes.In case you’re not grossed out enough already, you can tour the horrifying lump in 360 degrees on Facebook. Want more? The Museum of London offers a live video feed of a chunk of fatberg to feed your nightmares. The problem with most entry-level laptops: They come with mechanical hard drives. That makes for a mighty slow Windows experience. This Lenovo model features a 128GB solid-state drive, so it should be pretty quick to boot and load software, even with its basic processor. Plus, it has a DVD-burner! That’s not something you see in many modern laptops, especially at this price. Sarah Tew/CNET 7 Tidal 3-month family subscription: $5.99 (save $54) Preview • iPhone XS is the new $1,000 iPhone X Wacky science images from the Getty (pictures) $60 at Best Buy $999 Turo Boost Mobile Angela Lang/CNET Tags Rylo TVs Speakers Mobile Accessories Cameras Laptops Automobiles Smart Speakers & Displays DJI Osmo Action camera: $261 (save $89) Share your voice Sprint Lenovo 130-15AST 15.6-inch laptop: $210 (save $90) Read Google Home Hub review See at Turo Google Nest Hub: $59 (save $70) Mentioned Above Apple iPhone XS (64GB, space gray) See at Amazon Amazon The Cheapskate Best Buy I thought this might be a mistake, but, no, the weirdly named HP Laptop 15t Value is indeed quite the value at this price. Specs include an Intel Core i7 processor, 12GB of RAM, a 256GB solid-state drive and a 15.6-inch display. However, I strongly recommend paying an extra $50 to upgrade that display to FHD (1,920×1,080), because you’re not likely to be happy with the native 1,366×768 resolution. Sarah Tew/CNET The 210-foot (64 meter) fatberg is part of a modern problem where old sewer systems get packed full of congealed lumps of cooking oil, diapers, wipes and grease. London unveiled a particularly epic fatberg in 2017. The monstrous masses have to be physically removed from their lairs.”Fortunately, the fatberg has had no impact on Sidmouth’s excellent bathing water quality and has been discovered in good time,” South West Water reported Tuesday.. The utility reminded customers to only flush the “3Ps”: pee, paper and poo. See It $999 An Echo Dot makes a fine match for any Fire edition TV, because you can use the latter to say things like, “Alexa, turn on the TV.” Right now, the 24-inch Insignia Fire TV Edition starts at just $100, while the 32-inch Toshiba Fire TV Editions is on sale for $130. Just add any Fire TV Edition to your cart, then add a third-gen Echo Dot, and presto: The latter is free. HP Laptop 15t Value: $520 (save $780) Other Labor Day sales you should check out Best Buy: In addition to some pretty solid MacBook deals that have been running for about a week already, Best Buy is offering up to 40% off major appliances like washers, dryers and stoves. There are also gift cards available with the purchase of select appliances. See it at Best BuyDell: Through Aug. 28, Dell is offering an extra 12% off various laptops, desktops and electronics. And check back starting Aug. 29 for a big batch of Labor Day doorbusters. See it at DellGlassesUSA: Aug. 29 – Sept. 3 only, you can save 65% on all frames with promo code labor65. See it at GlassesUSALenovo: The tech company is offering a large assortment of deals and doorbusters through Labor Day, with the promise of up to 56% off certain items — including, at this writing, the IdeaPad 730S laptop for $700 (save $300).See it at LenovoLensabl: Want to keep the frames you already love and paid for? Lensabl lets you mail them in for new lenses, based on your prescription. From now through Sept. 2 only, you can save 20% on the blue light-blocking lens option with promo code BLOCKBLUE. See it at LensablSears: Between now and Sept. 7, you can save up to 40% on appliances (plus an additional 10% if you shop online), up to 60% on mattresses, up to 50% on Craftsman products and more. The store is also offering some fairly hefty cashback bonuses. See it at SearsNote: This post was published previously and is continuously updated with new information.CNET’s Cheapskate scours the web for great deals on tech products and much more. For the latest deals and updates, follow the Cheapskate on Facebook and Twitter. Questions about the Cheapskate blog? Find the answers on our FAQ page, and find more great buys on the CNET Deals page. Rylo 5.8K 360 Video Camera: $250 (save $250) Apple iPhone XS Post a comment Turo: Save $30 on any car rental Help name this disgusting 140-ton sewer fatberg Putrid fatberg is museum’s ‘most disgusting display ever’ See It Comments Read the AirPods review Read Lenovo Smart Clock review $520 at HP DJI’s answer to GoPro’s action cameras is rugged little model that’s shockproof, dustproof and waterproof down to 11 meters. It normally runs $350, but this deal drops it to $261 when you apply promo code 19LABOR10 at checkout.
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© 2014 Phys.org. All rights reserved. In the new study, the researchers successfully fabricated 100 x 100 arrays of vertical nanowires with radii of 80, 100, 120, and 140 nm, allowing the nanowires to absorb different wavelengths of light. The researchers demonstrated that these nanowire-based photodetectors can photograph color images of test scenes and the Macbeth ColorChecker card with a quality that is very similar to that obtained with a conventional camera.The new filter-free color imaging technique has some key advantages compared with the conventional filter technique, with perhaps the most important being a higher absorption efficiency that allows for higher pixel densities and higher resolution. The researchers predict that adding a bottom photodetector to the nanowire array would make it possible, in principle, for the device to absorb all incoming light and convert it into photocurrent. Such a device has the potential for extremely high photon efficiencies compared to filter-based devices, which by their nature absorb approximately half of the incoming light before it reaches the image sensor. The greater efficiency would then pave the way for cameras with higher resolutions. In addition to an improved efficiency, this approach simplifies the fabrication process. As the researchers explain, the pixels with different color responses can be defined at the same time through a single lithography step.Furthermore, the nanowire-based photodetectors also offer the opportunity for multispectral imaging. Cameras use multispectral imaging to capture light at different frequencies of the spectrum, including frequencies beyond the visible light range. With the new method, different parts of the spectrum can be targeted for absorption by fabricating nanowires with specific radii, a relatively simple process compared to fabricating filters and other methods. The researchers plan to work on further improving the photodetectors in the future.”We are currently working on incorporating substrate photodetectors to increase the efficiency as we mentioned above,” said coauthor Hyunsung Park at Harvard University. “In addition, we are developing elliptical nanowire-based photodetectors for polarization-resolved imaging. The major hurdle for commercialization is the higher dark current level of these devices, due to the fact they are produced by etching. This comes from the fact that there are many surface states, due to the large surface-to-volume ratio of the nanowires and damage to the silicon crystal structure from dry etching. We believe that this will be resolved in the future through alternative fabrication process or by adding passivation layers.” More information: Hyunsung Park, et al. “Filter-Free Image Sensor Pixels Comprising Silicon Nanowires with Selective Color Absorption.” Nano Letters. DOI: 10.1021/nl404379w The new approach takes advantage of the unique optical and electrical properties of one-dimensional semiconductor nanowires. Previous research has demonstrated that silicon nanowires absorb wavelengths of light that vary with the nanowire radius, allowing for control of light absorption by fabricating nanowires with controlled radii using a single lithography step. However, no color imaging experiments have been performed with silicon nanowires until now, partly due to the difficulty in assembling large numbers of nanowires into arrays. In the past few years, researchers have been investigating new ways to achieve color in digital cameras that don’t rely on conventional organic dye filters. In a new paper published in Nano Letters, a team of researchers from Harvard University in Cambridge, Massachusetts, and Zena Technologies Inc., in Topsfield, Massachusetts, have presented a new filter-free approach to color imaging. The technique uses silicon nanowires with different radii to absorb specific wavelengths, and thus colors, of light and convert the light into photocurrent.”Our nanowire-based approach performs color imaging without conventional color filters,” coauthor Kenneth B. Crozier of Harvard University told Phys.org. “This has two major advantages. First, our approach simplifies the fabrication process. Nanowire-based image sensor pixels with different color responses can be defined at the same time through a single lithography step. This means no additional materials or repeated deposition steps are needed for separating colors. Second, our approach opens the way to increase the efficiency of an image sensor. Each nanowire captures light of a specific color, and converts it to photocurrent. If we add substrate photodetector, we can capture the remainder of the spectrum. In this way, the image sensor can have higher efficiency, as photons would be not discarded by absorptive filters.” Color image of test objects taken by the nanowire-based photodetector. Credit: Park, et al. ©2014 American Chemical Society Citation: Color pixels made of nanowires offer new paradigm for digital cameras (2014, April 4) retrieved 18 August 2019 from https://phys.org/news/2014-04-pixels-nanowires-paradigm-digital-cameras.html Engineers create vibrant colors in vertical silicon nanowires (Left) Schematic of photodetectors based on vertical silicon nanowires. (Center) Magnified view of nanowires with radii of 80 nm, 100 nm, 120 nm, and 140 nm. (Right) Fabricated device mounted on PCB, with a magnified image in the inset. Credit: Park, et al. ©2014 American Chemical Society (Phys.org) —Most of today’s digital cameras achieve color by using red, green, and blue Bayer color filters through which light passes on its way to the camera’s image sensors, which then convert the light into electrical signals. Although this color filter technology is very widespread, it has some disadvantages related to durability, low absorption coefficient, and fabrication complexity. In addition, the absorbed light in the color filter cannot be converted into photocurrent. To maximize the efficiency in the trends of higher pixel density, this light needs to be converted to photocurrent. This document is subject to copyright. Apart from any fair dealing for the purpose of private study or research, no part may be reproduced without the written permission. The content is provided for information purposes only. Journal information: Nano Letters Explore further
This world book fair at New Delhi, National Book Trust (NBT) and Snapdeal have come together with an aim to inculcate reading habit amongst the underprivileged kids through their initiative ‘Har Hath Ek Kitab’. On this occasion, NBT and Snapdeal have launched an online portal, www.harhathekkitab.com to expand its outreach, so that people from across the country can support the movement by gifting books for underprivileged kids. During the fair, which will go on till January 14, Snapdeal and NBT will be promoting this initiative through various activity corners organised at different parts of Pragati Maidan. People interested in donating towards this program can either visit Snapdeal’s stall no. 63, Hall Hangar or they can just go to the website. Through the website or the stall, people can choose to gift anywhere between four to 2000 books at subsidised price of Rs 25 per book. Once a contribution is made, NGOs select relevant books for kids from a catalog of 600+ books by the NBT. These books are then dispatched to kids across India where reading among kids is facilitated by the NGO staff. Several Kids from various NGOs across NCR will also be exploring the fair and attending various workshops being organised as a part of this initiative. Also Read – Add new books to your shelfUnder the pilot phase of Har Hath Ek Kitab, 10,000+ books have been contributed for kids across India. With more than 10 NGOs involved – Teach for India, Goonj, Bhumi, 17000ft Foundation, etc. books have been delivered to kids across India from Ladakh to Chennai. During this book fair, Snapdeal aims to reach the milestone of 50,000 books.”We are excited to power the technology for the launch of ‘Har Haath Ek Kitaab’.com and are confident that the new site will enable people from anywhere in the world to donate books to young children. Snapdeal Sunshine aims to enrich life of many Indian citizens and this partnership is just another step in the direction,” said Rajnish Wahi, Sr. V.P Corporate Affairs and Communications, Snapdeal.Baldeo Sharma, Chairman, National Book Trust, India said, “On the occasion of New Delhi World Book Fair 2018, which promotes reading culture in the country, we have joined hands with Snapdeal for a noble cause to launch www.harhathekkitab.com. We are confident that this program will inspire people to donate books to enhance the knowledge of children and shape their future in a better way.”