Tailless supersonic plane revived

first_imgEDWARDS AIR FORCE BASE – The Defense Department is revisiting a page out of NASA Dryden’s past to check out the viability of an unusual airplane design for future long-range military jets. The oblique flying wing would be a tailless, supersonic airplane with a “scissors” wing in which one wingtip points forward and the other back at high speed – reducing drag and letting it fly fast on less power. “What we envision is an X-plane program,” said Thomas Beutner, program of the Defense Advanced Research Projects Agency. “Like the X-1 or the X-29, the Oblique Flying Wing program will be a technology demonstrator that explores a concept that can only be proven in flight.” Northrop Grumman is working on a $10.3 million DARPA contract for preliminary design and risk reduction work on the aircraft design. AD Quality Auto 360p 720p 1080p Top articles1/5READ MORE‘Mame,’ ‘Hello, Dolly!’ composer Jerry Herman dies at 88 If successful, the preliminary design effort may be followed by a second phase that would finalize a detailed design and build and flight test an X-plane, with first flight expected in 2010 or 2011. The oblique-wing design concept is attributed to the late Robert T. Jones, a NASA aeronautical engineer credited with advancing the idea of swept wing aircraft in the 1940s. Jones believed that an oblique wing supersonic transport aircraft might achieve twice the fuel economy of an airplane with conventional wings. “One of the things he was interested in was a plane with wings that pivoted,” said Alex “Skip” Sim, a former NASA Dryden engineer. “As a young engineer at the time, I was intrigued by it.” NASA’s own low-speed oblique-wing airplane, the AD-1, flew in the late 1970s and early 1980s at Dryden Flight Research Center. Burt Rutan, who would later gain fame with the Voyager aircraft and SpaceShipOne, contributed to the aircraft’s design. Dryden project participants described the project as a low-cost, simple effort. The airplane was built under a $240,000 contract. “When we built the AD-1, we were not able to find funding for an airplane to go into a supersonic flight regime. What we could do with the money we had was look at handling qualities at slow speeds,” said Sim, who worked on the AD-1. “AD-1 was a handling qualities test – to see from a pilot’s perspective how it would fly.” The twin-engine jet had an electronically driven mechanism that would slowly pivot the wings. The wing could pivot to as much as 60 degrees. The airplane was flown 79 times during a roughly three-year period. The angle of the pivot on the aircraft was slowly increased during the course of the flight test program until it reached the full 60 degrees. “The side forces are very significant once you get past 45 degrees,” said Tom McMurtry, a retired NASA test pilot who was the AD-1 project pilot. “It was not a nice flying airplane.” Jones considered the oblique wing a viable concept after the flight testing, but the aviation industry was cool to the idea, perhaps because of the AD-1’s poor flying qualities. McMurtry and Sim said the AD-1 had a very simple mechanical flight control system and the poor flying could have been addressed in a more sophisticated airplane. “I would have liked to have seen a high-speed demonstrator built, but at the time we couldn’t find the funds within the agency,” Sim said. McMurtry said he was not surprised at the renewed interest in the concept. “I wish them well,” McMurtry said of the DARPA effort. In announcing the contract award, DARPA acknowledged the NASA AD-1 effort and previous engineering studies on the concept. However, DARPA pointed out that no one has attempted high-speed flight and that their concept calls for a tailless aircraft. Jim Skeen, (661) 267-5743 james.skeen@dailynews.com 160Want local news?Sign up for the Localist and stay informed Something went wrong. Please try again.subscribeCongratulations! You’re all set!last_img read more

Half-time: Leicester 1 Chelsea 0 – Blues behind and Hazard off injured

first_imgEden Hazard went off injured during the first half at the King Power Stadium, where Jamie Vardy put Leicester ahead.Blues playmaker Hazard was replaced by Pedro on 28 minutes with what looked like a hip problem following a challenge from Vardy, who scored five minutes later.Riyad Mahrez, who had two early efforts gathered by keeper Thibaut Courtois, delivered a superb cross from the right and striker Vardy volleyed home his 15th goal of the season.The Foxes were forced into a change of their own when Danny Drinkwater picked up a hamstring injury after a quarter of an hour.But they remained on the front foot and Vardy’s goal put them within sight of a win that would take them back to the top of the Premier League.Chelsea: Courtois; Ivanovic, Zouma, Terry, Azpilicueta; Ramires, Matic; Willian, Oscar, Hazard (Pedro 31); Costa.Subs: Begovic, Cahill, Mikel, Fabregas, Kenedy, Remy.Follow West London Sport on TwitterFind us on Facebooklast_img read more

49ers mailbag: First place now but where will they finish?

first_imgSANTA CLARA — Another week in first place, another 49ers mailbag is here to answer questions submitted via Twitter and Instagram:Will game planning be even MORE intense and thorough for the Browns after how they played yesterday ? (@4GenSFFanFam)Browns go for 520 yards, 49ers go back to the drawing board? Nah. They prepare for an all-out assault each week, no matter the opponent. And the 49ers’ game plans sure seem better this year than past seasons – because they’re 3-0.Is Tevin Coleman the …last_img

Proteas start Sri Lanka tour with a win

first_img4 July 2014 Hashim Amla starred for the Proteas in the opening match of their tour of Sri Lanka, striking a 79-ball 104 before retiring as South Africa thrashed a Sri Lanka Cricket Board President’s XI by 108 runs in Moratuwa on Thursday. The warm-up match saw both teams employ 15-man squads, and for most of the South Africans it was a productive outing. Faf du Plessis weighed in with 41, captain AB de Villiers matched that score and retired out after only 27 deliveries, while JP Duminy contributed 54 as the Proteas posted 297 for 9 in their 50 overs. Lahiru Gamage, with 3 for 36 in his 10 overs, and Suraj Randiv, with 3 for 47, were the pick of the Sri Lankan bowlers.Sri Lankan Board President’s XI innings Needing almost six runs an over to win, the Board President’s XI lasted only 39.3 overs before they were bowled out for 189. Randiv top scored with 53, while Dinesh Chandimal made 50. The South African fast bowlers fared well, with Dale Steyn, Vernon Philander, Ryan MCLaren and Wayne Parnell all getting among the wickets. Morne Morkel, with 3 for 29 in seven overs, was the most successful of the Proteas’ quicks, while off-spinner Aaron Phangiso snapped up 2 for 9 in 2.2 overs.‘That is what warm-up games are about’ “It was nice to pick up some batting time,” Amla said after the match. “Most of us (batsmen) that got in managed to spend some time at the crease. That is what warm-up games are about.” “Personally it’s nice to get some runs ahead of the series,” he added. “The thinking ahead of the game was to try and get a few runs, retire out, then get the other batsmen in. After I reached my 50, I figured it was a good time to lift the scoring rate.” The squad has two more training sessions to fine-tune their game ahead of the first one-day international against Sri Lanka on Sunday. “From a team perspective, time on our legs was important,” Amla said. “A lot of the players who were involved in the IPL have been out for a month or so. It was good for them to get back into fielding for the whole day. Our 50 overs, along with the training sessions in the heat, are important in helping us acclimatise.”Concern about Kallis The only concern for the Proteas was all-rounder Jacques Kallis, who was withdrawn from the match after complaining of stiffness in his back during warm-up drills. Proteas team manager Dr. Mohammed Moosajee explained: “This morning he felt some discomfort in the upper right back region and was withdrawn from the match today as a precaution. Our physio, Brandon Jackson, treated him for most of the day and we will monitor him overnight to see how he responds to the treatment. “If he doesn’t respond to therapy, we will plan to get a scan done tomorrow. We are quite hopeful that some of the stiffness will settle down overnight.” SAinfo reporterlast_img read more

Taking a look back at the world of wearables in 2016

first_imgWhy IoT Apps are Eating Device Interfaces Tags:#Internet of Things#IoT#wearables Internet of Things Makes it Easier to Steal You… Follow the Puck Related Posts center_img Ryan Matthew Pierson 2016 has been a great year in wearable tech. We’ve seen the continued prominence of the smart watch, the rise of a new generation of virtual reality headsets, and a variety of new and unique products coming out of the crowdfunding world.2016 kicked off with a record-breaking quarter, with over 19.7 million wearable units shipped in the 1Q2016, up 67.2% from the same quarter in 2015.This growth goes well beyond the smartwatch market, which saw a steep 51.6% decline in 3Q2016 as brands including Apple and FitBit geared up to launch a new generation of their wearable devices.If there’s one thing that this year made clear, it’s that the wearables market is a lot more than smartwatches. It’s a whole new generation of devices that connect and interconnect with each other and the world to give the wearer something they couldn’t get from their smartphone alone.Fitness and healthFitness trackers are the gateway drug to wearable technology. Even people that don’t like smartwatches are likely to want a fitness tracker to keep tabs on their daily activity and encourage them to lead healthier lives.There are some studies out there that indicate that fitness trackers may not be as useful for everyone. That aside, they are a very appealing first step for many users as they dip their toes in the wearable technology world.The success of fitness trackers aside, the abandonment rate for these devices isn’t zero. The price gap between a basic fitness tracker and a smartwatch that also includes fitness tracking features like step counting and heart monitoring is holding a lot of people back from taking that next step (no pun intended).Fitness Trackers like the Garmin Edge and Frontrunner are taking fitness tracking to a new level. Users are being offered an important safety feature that alerts family and friends to their location while they’re out running. This makes them not only a great way to keep tabs on physical performance but to help keep the user safe while they’re out doing their thing.FitBit refreshed its lineup of trackers this year introducing the Flex 2 which is not only thinner and lighter than its predecessor, but also water resistant to 50 meters and able to track a swimmer’s activity. The Charge 2 was also unveiled this fall which has all of the features of the original and an additional breathing prompts to help you relax.This wasn’t FitBit’s only big move in 2016. It bought out Pebble, which is a dominant presence in the crowdfunding scene and known for making cross-platform smartwatches featuring e-paper displays with long battery life and plenty of hackability.Police and public policyOn a social standpoint, a spotlight has been placed on police-community interactions in recent years. In 2016, wearable body cameras became a focal point for new legislation aimed at creating a safer environment for citizens and providing an accurate, fair account of police-involved shootings.Many cities in the United States adopted policies requiring their law enforcement officers to wear body cameras. These policies vary greatly from city-to-city in terms of where, when, and how these recordings are taken and shared with the public. Studies have shown a dramatic reduction in complaints against officers that are wearing them.As more cities adopt the use of these body cameras, we can expect the costs involved and the infrastructure required to maintain the huge amounts of data they generate to become a hot topic for years to come.Virtual reality2016 brought us the realization of several years of anticipation of VR. Sony’s PlayStation VR, for example, has reportedly met all sales expectations in its first few months of release. In fact, the VR headsets are outselling consoles in Japan.Just about every company with skin in the gaming or small screen game is taking a stab at virtual reality. Google, which long had a whimsical VR experience through Google Cardboard, introduced Daydream in November which is a soft, comfortable VR experience requiring nothing more than the Daydream headset and a Pixel or Moto Z smartphone.HTC released its own major candidate in the VR space with the Vive. This VR experience requires a lot of room and the mounting of a two cameras (referred to as base stations) to get a full 3D experience you can walk around in. The HTC Vive has become the official VR experience for Steam’s VR endeavors.The Oculus Rift also made its public debut this year after receiving $2.4 million in initial funding back in 2014 through Kickstarter.Real-world gamingWearables have played an interesting role in this year’s most popular mobile game, Pokémon Go. This game, which forces users to step out of their homes and roam their local hot spots in search of cartoon monsters, is part augmented reality, part scavenger hunt, and part paper toss game.What makes this a wearable’s story? Apple dedicated nearly 10 minutes of its recent Apple Watch Series 2 announcement to app support for Pokémon Go. While wearing an Apple Watch, you can rack up steps which count towards hatching in-game eggs. You can even receive alerts when Pokémon are nearby. You can also get alerts when you are approaching a location that gives you access to free in-game goodies called a Pokéstop.Pokémon Go‘s creators Niantic have even created their own wearable. Pokémon Go Plus lets you catch Pokemon without even looking at your smartphone.The Pokémon Go Plus launched earlier this year and sold out in minutes. Today, stores around the world are anxiously awaiting the eventual second shipment of these little wrist-worn devices as early buyers attempt to turn huge profits on sites like Ebay, Amazon, and even Walmart where a $39 device is currently priced at $214.SmartwatchesWe can’t really talk about wearables without coming back to the flagship sub-category, smartwatches.Sales of smartwatches have been on the decline since Apple’s initial launch of the highly anticipated Apple Watch. The Apple Watch was the initial introduction to the smartwatch world for many Apple fans that had long been left out of the loop in the many Android-based options.Apple would, of course, rebound in the 4Q2016 boasting impressive (yet not yet publicly released) sales numbers of the Apple Watch Series 2. The Apple Watch Series 2 is water resistant, making it possible to take it in the pool with you without panicking over the possible loss of your $300 device.Another big trend in the smartwatch world this year are hybrid smart watches. These watches feature the face of a traditional analog watch with the backend of a smartwatch. One brand pushing these very heavily is Fossil, which hopes that the sleeker look and longer battery life of hybrid watches will convince more users to switch.On the Android side of things, the Android Wear program is in full swing with over a dozen companies offering smartwatch options with feature sets that go well beyond what we thought was possible even five years ago.The Samsung Galaxy Gear S3, for example, is a beautifully traditional looking smartwatch with a brilliant display and an extensive feature set.Smart glassesYou probably thought smart glasses might be dead. A pair of crazy looking sunglasses fitted with cameras might change your mind.We really can’t do a proper wearables round-up without talking about the Snapchat Spectacles. This product came out of nowhere and immediately captivated the social media crowd. It has a $130 price point and supplies are intentionally scarce.If you’re lucky, you might end up with a Spectacles vending machine popping up for a limited time near you. Supplies are super limited and getting your hands on a pair of these is extremely tricky. You never know where a Spectacles vending machine is going to appear. It could be New York City or a truck stop in Nebraska.The wearable market is constantly evolving. What was a big hit one year could be the inspiration for a whole new category the next! Small Business Cybersecurity Threats and How to…last_img read more

Understanding Color Rendering Index with LEDs

first_imgThe Color Rendering Index can help you get the best LED color reproductions.Cover image via Shutterstock.The Color Rendering Index (CRI) is the go-to measure when speaking about the quality of different sources of light; the CRI rating can have a big effect on the reproduction of colors in your video shoot, so it’s important to keep in mind when selecting and using lights. However, do not confuse it with “color temperature,” which describes other aspects of light.What Is CRI?The CRI describes how accurately a light source reproduces colors on a scale from 1 to 100. The lower the number, the worse the reproduction of the color. Some spectrometers, such as the Sekonic C-700 or Gossen Mavospec, can read and display the CRI of a metered light source. That makes them brilliant tools for comparing different manufacturers and sources when working in videography and photography. However, these meters may be too expensive for many shooters, and while you can rent them, they aren’t a necessity on set. (Manufacturers will often list the CRI ratings of their lights on their websites.)As a general rule, any source with a CRI rating of 90 or above will faithfully render colors. Most good tungsten sources will have a CRI rating of 90 or above — often over 95. Sunlight will have the best CRI rating of all.The following is an example of the CRI rating of sunlight.Notice that the rating divides into eight different colors. This is a problem when using the CRI rating to analyze manufactured light sources — the sampling is only an average of eight colors. It is possible for a light to have a good CRI rating in regards to these eight colors, but it could still have a low rating beyond these color samples. It may not score highly for a deeply saturated red, for example, which would lower the rendering rating. Some LED lights can show large variations in different parts of the color spectrum when compared to tungsten or daylight; therefore, it is necessary to look beyond the standard eight colors when analyzing LEDs in particular.Beyond CRIThe Television Lighting Consistency Index (TLCI) is an improvement upon the CRI rating. It samples twenty-four colors, and it is more reliable for analyzing how light renders on a camera’s sensor. However, this index was initially for broadcast television cameras and arguably does not account for single-chipped cameras that are more common in the film and video industry.The Extended CRI rating (sometimes referred to as Special CRI) is the most useful for the majority of film and video applications. It is also what the Sekonic C-700 will display. The Extended CRI rating adds R9 – R15 colors to the standard CRI samples — including, most importantly, R9 Saturated Red, R13 Skin Color (Light), and R15 Skin Color (Medium), which are all difficult colors to faithfully reproduce.The image below shows an example of the Extended CRI rating of sunlightThis is as close as you are likely to get to a perfect CRI rating on a spectrometer on set. It shows that even sunlight is not getting a full 100 rating. This could be due to any number of reasons — even bounced light affecting the reading. However, it is a very good gauge of the reliability.Cheap LEDsIf we now look at a cheap LED, you will see a big difference.There are many areas of the color spectrum that this light will not render correctly. This would most likely result in odd hues in skin tones or other color casts within the image that are unexpected, undesired, and uncontrollable. However, the manufacturer could justifiably give this light source a CRI rating of 83. This is not an excellent rating but, at first glance, should at least imply a decent rendering of most colors. If this light source is priced well, it may be a viable alternative to more expensive options. Now the importance of the Extended CRI rating becomes more relevant. One can’t use sources such as this and expect faithful color reproduction across the spectrum. You would likely see similar inconsistencies with other cheap sources, most commonly with halogen and fluorescent lights.So, if you are looking to save money when renting or buying LEDs, halogens, or fluorescents, then always start by checking for an Extended CRI rating or a TLCI rating. If you can’t find one, consider renting a spectrometer and checking the rating yourself.Do you have tips for assessing lighting sources? Let us know in the comments.last_img read more

Stones hurled at MP CM Chouhan’s vehicle in Sidhi

first_imgMiscreants threw stones on the vehicle carrying Madhya Pradesh Chief Minister Shivraj Singh Chouhan, who is touring the State ahead of Assembly elections, in Churhat area near Sidhi district, a police official said. Mr. Chouhan was not hurt in the incident, Churhat Police Inspector Ram Babu Choudhari told PTI over phone. He did not give any more information, saying he was busy discharging his duties at a public meeting of the chief minister in the district. Stones were hurled at Mr. Chouhan’s vehicle in Churhat area — which is the Assembly constituency of Leader of Opposition Ajay Singh, Madhya Pradesh BJP spokesman Rajnish Agrawal said.Churhat is about 25 km from the district headquarters. Later addressing a public meeting in the district as part of his Jan Ashirwad Yatra, Mr. Chouhan dared Mr. Singh to come in the open and fight with him. “Ajay Singh, if you have strength come in open and fight with me,” he said.“I am physically weak but I won’t be bogged down by your deeds. People of the state are with me,” he added. In a press release, Mr. Singh said no Congressman was involved in the stone-pelting incident. He said his party does not follow the culture of violence. “I suspect that it was a well thought and hatched conspiracy aimed at defaming me and people of Churhat,” he added. Mr. Chouhan is touring the State in a bus modified as a chariot.last_img read more