Sevincer A.,UNR |
Bhattarai A.,FIU |
Bilgi M.,UC Corporation |
Yuksel M.,UNR |
IEEE Communications Surveys and Tutorials | Year: 2013
Recently, rapid increase of mobile devices pushed the radio frequency (RF)-based wireless technologies to their limits. Free-space-optical (FSO), a.k.a. optical wireless, communication has been considered as one of the viable solutions to respond to the ever-increasing wireless capacity demand. Particularly, Visible Light Communication (VLC) which uses light emitting diode (LED) based smart lighting technology provides an opportunity and infrastructure for the high-speed low-cost wireless communication. Though stemming from the same core technology, the smart lighting and FSO communication have inherent tradeoffs amongst each other. In this paper, we present a tutorial and survey of advances in these two technologies and explore the potential for integration of the two as a single field of study: LIGHTNETs. We focus our survey to the context of mobile communications given the recent pressing needs in mobile wireless networking. We deliberate on key challenges involved in designing technologies jointly performing the two functions simultaneously: LIGHTing and NETworking. © 1998-2012 IEEE.
News Article | December 19, 2015
A team of researchers from the University of Nevada in Reno (UNR) and the University of Arkansas in Little Rock (UALR) announced on Dec. 15 that they plan to develop a wearable robotic device that would assist visually impaired individuals to navigate past obstacles in their surroundings. The technological breakthrough is being developed with the $820,000 grant awarded by the National Institute of Health's (NIH) National Eye Institute division. The National Robotics Initiative grant will give the research team three years to complete the project. The team is led by Yantao Shen, Assistant Professor at the University of Nevada and his research partner, Professor Cang Ye from the UALR Department of Systems Engineering and composed of their postdoctoral, graduate and undergraduate students "The miniaturized system will contribute to the lives of visually impaired people by enabling them to identify and move objects, both for navigational purposes or for more simple things such as grasping a door handle or picking up a glass," Shen, lead researcher, said. He also noted that they hoped to expand the potential applications for the robotic hand. "Space exploration, military surveillance, law enforcement and search and rescue" can also benefit from the technology. "It is a big success for Dr. Shen and a clear evidence of the continuous growth of our biomedical engineering and autonomous systems programs, which have become major areas of focus for the College of Engineering," Manos Maragakis, Dean of UNR's College of Engineering said. Along with France's Pixium Vision and other advances to help the blind "see," it seems that we are taking another step further to improving the lives of our visually impaired brothers that will make even Louis Braille proud. We truly are in the age when physical disabilities are no longer a hindrance through the aid of technological advances.
Druker A.,UNR |
Druker A.,CONICET |
Vermaut P.,École Nationale Supérieure de Chimie de Paris |
Ochin P.,CNRS East Paris Institute of Chemistry and Materials Science |
And 2 more authors.
Acta Microscopica | Year: 2013
In Fe-Mn-Si alloys, the shape memory effect (SME) is related to a stress-induced martensitic transformation. The transformation proceeds from the austenite phase, normally retained at room temperature, to a hexagonal-close-packed martensite: (FCC) → (HCP). However, when ribbons of a Fe-14Mn-6Si-8Cr-5.5Ni alloy are manufactured by rapid solidification, the high temperature ferritic phase can be retained. As a consequence, not only decreases the materials capacity to recover its shape, but weakens the material, as well. In melt-spinning techniques, the thickness of the ribbons as well as the stable or metastable phases that result from the process, depend mainly on the gas ejection pressure, liquid temperature, and wheel temperature and rotation speed. In this work, we used optical microscopy and transmission and scanning electron microscopy, to investigate the microstructures obtained for various melt-spinning process variables. We also analyzed the effect of heat treatments applied in order to stabilize the austenite at room temperature and to optimize the shape memory behavior.
News Article | November 15, 2016
FRANKLIN, TN, November 15, 2016-- William F. Andrews has been included in Marquis Who's Who. As in all Marquis Who's Who biographical volumes, individuals profiled are selected on the basis of current reference value. Factors such as position, noteworthy accomplishments, visibility, and prominence in a field are all taken into account during the selection process.After more than five decades of invaluable contributions to his field, Mr. Andrews, a former captain in the U.S. Army, retired in 2015. He started his professional journey into the financial services realm back in the 1950s, when he obtained a Bachelor of Science in business administration from the University of Maryland and later, an MBA in marketing from Seton Hall University. Upon graduation, Mr. Andrews obtained one of his first professional roles with Scovill Manufacturing Company's Waterbury, Conn., branch as a product manager. Three years later, he transferred to the company's Raleigh, N.C., branch, where he stayed for five years as a vice president and general manager. He continued on with the company in Nashville, Tenn., as their group vice president from 1973 until 1979, and returned to the Waterbury branch in the late 1970s as the company's president and subsequently their chairman, president and chief executive officer.In 1986, after more than two decades with Scovill, Mr. Andrews obtained the roles of chairman, president and CEO of Singer Sewing Machine Company, where he worked until 1989. Similar roles were obtained with Massey Investment Company, UNR Industries Inc., and Amdura Corp. through the mid-90s. Kohlberg & Co., LLC was his last place of employment, where he served as both partner and principal until his retirement in 2015. Throughout his lengthy career, he has served on 35 public boards, and as chairman of seven public companies and five private companies, including Corrections Corp. America, Black Box, Inc., Trex Company, Inc., Northwestern Steel & Wire Co., Allied Aerospace Industries, Inc., and First Bank, where he will soon obtain a new board position.A member of numerous clubs, including Snake River Sporting Club, Shooting Star Country Club and the International Polo Club of Wellington, Fla., Mr. Andrews has won numerous awards for his stellar achievements. In 2000, he won the Significant Sig Award and the Silver Beaver Award through the Boy Scouts of America and 11 years later, he was named ODX Director of the Year. Additionally, he was named to numerous publications, including Who's Who in Corporate America, Who's Who in Finance and Business, Who's Who in America, and Who's Who in the World. Looking ahead, Mr. Andrews intends to continue enjoying his retirement and new board position with First Bank.About Marquis Who's Who :Since 1899, when A. N. Marquis printed the First Edition of Who's Who in America , Marquis Who's Who has chronicled the lives of the most accomplished individuals and innovators from every significant field of endeavor, including politics, business, medicine, law, education, art, religion and entertainment. Today, Who's Who in America remains an essential biographical source for thousands of researchers, journalists, librarians and executive search firms around the world. Marquis now publishes many Who's Who titles, including Who's Who in America , Who's Who in the World , Who's Who in American Law , Who's Who in Medicine and Healthcare , Who's Who in Science and Engineering , and Who's Who in Asia . Marquis publications may be visited at the official Marquis Who's Who website at www.marquiswhoswho.com
News Article | December 21, 2016
RENO, NV--(Marketwired - Dec 20, 2016) - SmartStop Asset Management, LLC recently announced that it facilitated the acquisition of The Summit, a 186 unit /709 bed, Class "A", purpose-built student housing community located adjacent to the University of Nevada, Reno (UNR) campus for approximately $70 million. John Strockis, senior vice president of acquisitions for SmartStop Asset Management, facilitated the transaction on behalf of a SmartStop affiliate. "We are pleased to have acquired our first student housing property with the goal of expanding our commercial real estate portfolio to include not only high-quality self storage assets, but also student and senior housing investment opportunities," said H. Michael Schwartz, chairman and CEO of SmartStop Asset Management. Located one block from the UNR campus at 2780 Enterprise Rd, The Summit is a seven-building property that sits on 8.95 acres and totals approximately 237,547 rentable square feet. The units are fully furnished and include energy-efficient appliances, ensuite washer and dryer, interior condominium finishes with granite countertops, pendant lighting, espresso finish cabinets and wood vinyl plank flooring. In addition, The Summit offers vast amenities including a two-story clubhouse with fitness center, game lounge, pool, spa, computer room and business center, campus shuttle service, common area barbecues, tanning room, security, 14 private study rooms, covered parking, gated access and covered bike storage areas. "The state-of-the-art architectural design offer students a sense of community and connectedness that will make this property attractive to student/residents for many years to come," said Strockis. "In addition, this newly constructed property is currently benefiting from the strong economic expansion in greater Reno." The Summit is 99% occupied, is LEED Silver Certified and offers many green amenities such as energy-efficient HVAC, high-grade air filters, drought-tolerant landscaping and energy efficient lighting. In addition, the property offers +1 Gigabit of bandwidth capacity so students have the benefit of fast and reliable Internet connectivity and ability to stay connected to multiple devices to support their academic needs. About SmartStop Asset Management, LLC SmartStop Asset Management, LLC is a diversified commercial real estate company focusing on self storage, student housing and senior housing with nearly $1 billion of assets under management. Additional information is available at www.smartstopassetmanagement.com.
News Article | November 26, 2015
Now, scientists who've been cultivating gumweed on the Reno campus think they are on the verge of producing diesel fuel, and perhaps someday jet fuel, from the sticky cousin of the sunflower that grows across much of Nevada's high desert and doesn't compete for acreage with animal feed or food crops used to make ethanol. Glenn Miller, an environmental sciences professor in UNR's College of Agriculture, Biotechnology and Natural Resources, is leading the project in the second year of a four-year, $500,000 grant from the U.S. Department of Agriculture. Miller didn't know much about gumweed when Darrell Lemaire, a mining engineer, secured the DOE grant in 1980 and approached him about doing some research in his lab. "He read chemical abstracts for recreation," Miller recalled. "He built a big house up in the rocks (above campus) with a wine cellar 50 feet down. He gave me a couple bottles—of Gumweed Extract, 1981-82, 1982-83." The two scientists began growing gumweed on campus about 10 years ago and their project evolved from the premise that biofuels shouldn't be competing with food crops in Nebraska and Kansas. Gumweed, also known as tar weed, requires little water to grow. "You could grow it in places like Nevada where you are not growing soybeans or corn," Miller said. Lemaire, 89, published his findings in a 1982 book, Cultivation of Hydrocarbon Producing Plants Native to the Western U.S., and the Whole Plant Utilization of the Oils and Byproducts. "This was after the Carter years when Jimmy Carter wore sweaters whenever he addressed the nation from the White House to indicate to everybody we were running out of energy," Miller said. Miller said UNR researchers have successfully produced fuel by extracting hydrocarbons from the weed's oil and are in the process of getting it tested as a diesel fuel. Now it's a question of refining the process to determine if farmers can make money on it. In recent years, environmentalists have argued that ethanol adds to global warming by removing millions of acres of land from conservation reserve programs for use in corn production, and has led to higher food costs worldwide as more corn is used for fuel. Bill Payne, dean of UNR's College of Agriculture, said the gumweed research addresses those concerns while anticipating current low oil prices won't last forever. "As prices once again reach $80 or more per barrel, this type of technology will look increasingly attractive to an industrial world struggling to reduce its carbon emissions," Payne said. Hongfei Lin, a collaborator in UNR's College of Engineering, is trying to find a more cost-effective way to convert biomass into fuel. Instead of adding hydrogen to biomass, he's exploring utilization of oxidation—the same process involved when substances come in contact with oxygen molecules, such as when a fresh cut apple turns brown or a copper penny turns green. Lin estimates that if gumweed was raised on just 10 percent of the thousands of square miles in Nevada where sagebrush currently grows, it could produce an estimated 400 million to 600 million gallons of biofuels annually. Gumweed has been used many different ways historically. Native Americans used it for medicinal purposes and early pioneers chomped on it as a substitute for chewing gum. "I have tried eating the stuff," Miller said. "It tastes terrible. I don't think there's any future in that." Explore further: With cellulosic ethanol, there is no food vs. fuel debate according to MSU scientist
Ross P.W.,NSTec |
Cardenas M.,NSTec |
Griffin M.,NSTec |
Mead A.,NSTec |
And 3 more authors.
Proceedings of SPIE - The International Society for Optical Engineering | Year: 2013
Strip velocity measurements of gated X-ray imagers are presented using an ultra-short pulse laser. Obtaining time-resolved X-ray images of inertial confinement fusion shots presents a difficult challenge. One diagnostic developed to address this challenge is the gated X-ray imagers. The gated X-ray detectors (GXDs) developed by Lawrence Livermore National Laboratory and Los Alamos National Laboratory use a microchannel plate (MCP) coated with a gold strip line, which serves as a photocathode. GXDs are used with an array of pinholes, which image onto various parts of the GXD image plane. As the pulse sweeps over the strip lines, it creates a time history of the event with consecutive images. In order to accurately interpret the timing of the images obtained using the GXDs, it is necessary to measure the propagation of the pulse over the strip line. The strip velocity was measured using a short pulse laser with a pulse duration of approximately 1-2 ps. The 200nm light from the laser is used to illuminate the GXD MCP. The laser pulse is split and a retroreflective mirror is used to delay one of the legs. By adjusting the distance to the mirror, one leg is temporally delayed compared to the reference leg. The retroreflective setup is calibrated using a streak camera with a 1 ns full sweep. Resolution of 0.5 mm is accomplished to achieve a temporal resolution of ∼5 ps on the GXD strip line. © 2013 SPIE.
Milardovich N.,Laboratorio Of Electricidad |
Prevosto L.,Grupo de Descargas Electricas |
Advanced Electromagnetics | Year: 2014
A numerical investigation on the harmonic disturbances in low-voltage cables feeding large LED loads is reported. A frequency domain analysis on several commerciallyavailable LEDs was performed to investigate the signature of the harmonic current injected into the power system. Four-core cables and four single-core cable arrangements (three phases and neutral) of small, medium, and large conductor cross sections, with the neutral conductor cross section approximately equal to the half of the phase conductors, were examined. The cables were modelled by using electromagnetic finite-element analysis software. High harmonic power losses (up to 2.5 times the value corresponding to an undistorted current of the same rms value of the first harmonic of the LED current) were found. A generalized ampacity model was employed for re-rating the cables. It was found that the cross section of the neutral conductor plays an important role in the derating of the cable ampacity due to the presence of a high-level of triplen harmonics in the distorted current. The ampacity of the cables should be derated by about 40 %, almost independent of the conductor cross sections. The calculation have shown that an incoming widespread use of LED lamps in lighting could create significant additional harmonic losses in the supplying low-voltage lines, and thus more severe harmonic emission limits should be defined for LED lamps. © 2014, Tarbiat Modares University. All rights reserved.