Air Force Secretary Heather Wilson, industry leaders and elected officials celebrated the launch of beyond visual line of sight (BVLOS) flight operations for large unmanned aerial systems (UAS) on Monday at Grand Sky, a UAS-focused research and development park at Grand Forks AFB, N.D. “Flying large UAS beyond visual line of sight in the national airspace will allow the unmanned aircraft industry to demonstrate its true potential for contributing to commercial aviation operations,” said Thomas Swoyer Jr., president of Grand Sky Development Co., according to a news release. “It reduces the cost for operators to test and prove systems and provides the opportunity for real-world demonstrations of how unmanned and manned aircraft can share the skies safely and efficiently.”Grand Sky recently became the first U.S. location to receive regulatory permission to host commercial BVLOS test flights for large unmanned aircraft following a 36-month process led by the Northern Plains UAS Test Site. Initial BVLOS flights at Grand Sky will be limited to large UAS flying within 30 nautical miles of Grand Sky and will be subject to several additional FAA restrictions until the safety of the flights is demonstrated. Dan Cohen AUTHOR
It’s been over 20 years since General Motors launched its OnStar suite of connected vehicle services. Available on every GM car, OnStar can automatically send help if you’ve been in a crash, deliver a gallon of fuel to your car if you’re stranded or deliver turn-by-turn directions even if you don’t have embedded navigation.GM might’ve gotten their first, but today, lots of other competing telematics services offer these features. But GM’s OnStar still holds a trump card — it can help police recover your vehicle in the event it gets stolen. That’s right, while other automakers such as BMW, Honda and Toyota offer systems that just locate your missing car, OnStar can actively slow down the vehicle when a thief is behind the wheel. This tech isn’t new — in fact, it just celebrated its 10-year anniversary. All-in, OnStar is almost inarguably the first consumer connected car technology available at scale, and since connected car tech is seemingly on every automaker’s lips these days, we thought we’d revisit where it all started. 2020 BMW M340i review: A dash of M makes everything better 2020 Hyundai Palisade review: Posh enough to make Genesis jealous Comments Auto Tech More From Roadshow 2020 Kia Telluride review: Kia’s new SUV has big style and bigger value 3:29 Tags Now playing: Watch this: Share your voice 5 GM OnStar is the original in-car tech When you report a stolen car to both OnStar and the local authorities, GM uses GPS data to locate the vehicle. Once officers get a visual of the car, OnStar flashes the hazard lights and cuts power to the vehicle. The brakes and steering aren’t affected, relying on the idea that the confused thief will pull over, exit the car, and get their comeuppance.The least-expensive way to get this tech is with the $25-a-month Safety and Security Package. In addition to the stolen-vehicle locator and slow-down functionality, you get emergency services, roadside assistance, a “crisis assist” function (which can provide special routing in an emergency or during severe weather) and turn-by-turn navigation.The only comparable system on the market today comes from Hyundai, built into its BlueLink interface.OnStar’s vehicle slowdown function is super handy and it prioritizes safety — the safer the apprehension of the vehicle and thief, the better it is for everyone involved. And since GM says it slows down a stolen vehicle once every three or four days, it’s a system that continues to pay dividends a decade after its inception. General Motors
Journal information: Journal of the American Chemical Society It has often been said that solar cells are like artificial versions of the photosynthetic apparatuses found in plants, such as leaves, since both harvest sunlight. But nature’s leaves can do something that most solar cells cannot do: protect themselves against photochemical damage from overexposure to sunlight. Illustration of the light-harvesting funnel array that directs energy to a focal point along diverse routes, and then slowly off-loads the energy to a solar cell or other device. Credit: Raymond Ziessel, et al. ©2013 American Chemical Society More information: Raymond Ziessel, et al. “An Artificial Light-Harvesting Array Constructed from Multiple Bodipy Dyes.” Journal of the American Chemical Society. DOI: 10.1021/ja4049306 Researchers recreate photosynthesis to power devices © 2013 Phys.org. All rights reserved. Explore further 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. Citation: Photon funnel could direct and regulate light into solar cells (2013, July 26) retrieved 18 August 2019 from https://phys.org/news/2013-07-photon-funnel-solar-cells.html In an attempt to protect artificial light-harvesting devices from sun damage, chemists have designed a funnel-shaped molecular-scale array that harvests photons, spreads the energy around the array, and off-loads the energy at a relatively slow rate to a solar cell or other device. By regulating the amount of energy that enters the solar cell, the new array could extend the lifetime of the solar cell, which must function in harsh conditions associated with prolonged exposure to sunlight.The researchers, Raymond Ziessel, Gilles Ulrich, and Alexandre Haefele at the University of Strasbourg in France, along with Anthony Harriman at Newcastle University in the UK, have published their paper on their artificial light-harvesting array in a recent issue of the Journal of the American Chemical Society.”UV light is harmful to the cells and to the supporting structure,” Harriman told Phys.org. “Photons are lost by way of annihilation, and optimal performance requires a steady flux of photons. This is even more important for water-splitting devices, which is where we see our light harvester having real applications.”The new array consists of 21 Bodipy (“boron-dipyrromethene”) dyes, which are highly fluorescent dyes known for their good light absorption and emission. The Bodipy dyes are arranged in a funnel-like design that converges onto a focal point. When exposed to light, the array guides the excitation energy from incident photons through the funnel through a series of cascading energy transfer steps until the energy reaches the focal point. The most important feature of the design is its ability to self-regulate its energy. When the focal point is in an excited state, further energy transfer to the focal point is restricted. In order to increase the amount of energy that reaches the focal point, the topology of the array provides diverse travel routes for the energy to ensure different arrival times. The strategy involves redistributing excess energy within the array until the focal point is no longer “saturated.” This mechanism for protecting against overexposure to sunlight is not strictly based on the mechanisms used by plants. In nature, various different mechanisms have evolved for this purpose, although the details of these mechanisms are still under active debate.While the properties of the new array are intriguing, the scientists add that the actual synthesis is also state-of-the-art. Using Bodipy dyes as building blocks allows certainty about the emergent structure, unlike when using other molecules, such as dendrimers, where it is difficult to assure complete growth with each layer. In the future, the molecular-scale funnel could protect solar cells by functioning as a sensitizer; that is, transferring energy in a controlled way to the solar cells or other external devices. The array also provides a benefit in stability compared with using a mixture of compounds. And although the array restricts energy transfer, it does not decrease solar cell efficiency.”At present, the limiting efficiency is coupling together the two systems,” Harriman said. “In principle, there should be no decrease in efficiency. The real advantage will come from using a large-area collector and a small-area solar cell.”In the future, the researchers plan to improve the transfer of photons from the array to the solar cell.”We are trying to build systems where the photons move easily from cluster to cluster before being trapped by the solar cell,” Harriman said. “Also, we are looking into ways to push the photons towards the solar cell, rather than rely on random migrations. This kind of quantum coherence might be important in certain cases in nature but is way beyond the current capability of artificial systems. We have ideas on how to improve and we foresee rapid progress in this field.”
Raindrops are lovely to look at, but stepping out when it’s pouring may not be the best idea for your hair. Rainwater may spoil your locks and make them look rough and greasy. But fret not!Beauty experts Ishika Taneja and Blossom Kochchar suggest use of good serums and conditioners to keep your hair nourished and hydrated during monsoon. Always use a hair protective styling mousse before styling your hair, says Taneja.‘It will protect your mane from excess heat from the dryers, straighteners and curling tong. One can also use an anti-humidity fine spray as it helps fix and keep your hairstyle in place for long hours. Use shine spray in the end as it provides additional sheen to your hair,’ she added. Also Read – ‘Playing Jojo was emotionally exhausting’Kochchar says homemade hair care remedies can be handy too. Sharing some, she said:-Add two tablespoons of curd (or more depending on your hair length) to gram flour (besan). Add little olive oil. Apply it to your hair and leave it for 15 to 20 minutes. Wash it later.-You can also use mixture of water and vinegar as an after-shampoo serum to help calm your hair down.-Prepare a mixture of one banana and one tablespoon honey. Put in your hair for 15 minutes and then wash it off. It helps make hair soft and smooth.
Kolkata: With coal stock of some power stations in the national capital region falling to an alarming level, Coal India and Railways are rushing coal supplies to Dadri and Badarpur power plants of the NTPC. A Coal India statement issued tonight said against the linked requirement of seven rakes to these plants, movement of at least 10 rakes are planned to avert the crisis. The problem started as the National Thermal Power Corporation (NTPC) was forced to commence generation from these two plants all of a sudden with rise in power demand due to heat wave conditions in the country. Also Read – Heavy rain hits traffic, flightsThe government has also instructed the CIL, Singareni Collieries Co Ltd and Railway to attach top most priority in allocation of rakes for coal movement to power plants till such time the demand from coal-based thermal power plants gets stabilised with the onset of monsoon and increase in hydel and wind power.These two power stations cater to major share of the power demands of Delhi and NCR. Based on the demand for power projected by the Delhi government, NTPC had shut the units of Badarpur TPS for long, it said. Also Read – Speeding Jaguar crashes into Merc, 2 B’deshi bystanders killedOne of the unit of the Dadri TPS was also taken up for maintenance. Therefore, coal against the linkage of the shut down generation units of Badarpur and Dadri TPS were supplied to other plants of the NTPC, the statement said.”The crisis could have been averted had Delhi government placed a proper power demand with NTPC with sufficient advance notice,” the CIL release said. Delhi Power Minister Satyendar Jain had yesterday said that the coal stock at some power stations in the national capital region has dipped to an “alarming” level and if it is not replenished at the earliest, Delhi could be staring at “black-out” situations.Jain had said that he has already written to Coal and Railway Minister Piyush Goyal apprising him about the situation and sought his intervention into the matter.
Kolkata: Construction of the underground tunnel for the East-West Metro railway from Esplanade to Sealdah will start from next Thursday.It will take one year to one-and-a-half years to complete the construction on the most difficult terrain and work will go on, keeping the traffic flow intact. Senior officials of the Kolkata Municipal Corporation (KMC) said the construction of the tunnel will be very difficult as there are many buildings more than 100 years old on the route chosen. Also Read – Speeding Jaguar crashes into Mercedes car in Kolkata, 2 pedestrians killedThere are a couple of buildings more than a century old including the headquarters of the Kolkata Municipal Corporation, Metropolitan Building and the residence of Rani Rashmoni at Janbazar among others. The Kolkata Metro Rail Corporation Limited (KMRCL) had vacated the old buildings during the construction of an underground tunnel off Brabourne Road and a similar method will be followed here as well. The KMRCL will vacate old premises and rehabilitate the inhabitants. Also Read – Bose & Gandhi: More similar than apart, says Sugata BoseThe underground tunnel will be constructed below S N Banerjee Road up to the Bank of India branch and then Sealdah. The Tunnel Boring machine (TBM) will start digging from next Thursday. As there is heavy flow of traffic in areas around Esplanade special precautionary measures will be taken. Senior civic officials said the physical health of the old buildings has been examined and problems are not likely to occur. The total length of the East-West Metro line is 16.6 km. The elevated corridor is 5.8 km and underground is 10.8 km. An 11 km long tunnel has been constructed under river Hooghly. The construction of the East-West Metro in Salt Lake is complete and the coaches are being given a trial run.
Three IT companies – Microsoft, DE Shaw & Co. and PayPal – have together recruited 16 candidates with super dream offers during the slot-1 campus placements for the 2019 B.Tech. graduating batch, at the Vellore Institute of Technology campus, recently.The highest super dream offer of Rs.39 lakhs per annum since VIT inception was given by Microsoft to eight students. DE Shaw & Co. recruited one student with a dream offer of Rs.33 lakhs per annum while PayPal gave a dream offer of Rs.21.5 lakhs per annum to seven students. Also Read – Add new books to your shelfThe campus recruitment process of super dream companies (CTC of more than Rs.10 lakhs per annum) would continue till the first week of August, and more than 30 companies in this category are expected to visit VIT for their recruitment. This process will be followed by the visit of dream companies (IT and core) that offer more than Rs.5 lakhs per annum.M.Tech. internship placements for the 2019 graduation batch took place in June, with 60 companies recruiting 507 M.Tech students with internship stipend ranging from Rs.10,000 to Rs.45,000. Intel has recruited 147 M.Tech. students for internship this year.487 companies were involved in the recruitment process last year, while more than 500 companies are expected to visit VIT for the recruitment exercise till May 2019.