Researchers Boost Efficiency and Stability of Optical Rectennas
By John Toon – The research team that announced the first optical rectenna in 2015 is now reporting a two-fold efficiency improvement in the devices — and a switch to air-stable diode materials. The improvements could allow the rectennas – which convert electromagnetic fields at optical frequencies directly to electrical current – to operate low-power devices such as temperature sensors.
Optical rectennas operate by coupling the light’s electromagnetic field to an antenna, in this case an array of multiwall carbon nanotubes whose ends have been opened. The electromagnetic field creates an oscillation in the antenna, producing an alternating flow of electrons. When the electron flow reaches a peak at one end of the antenna, the diode closes, trapping the electrons, then re-opens to capture the next oscillation, creating a current flow.
The switching must occur at terahertz frequencies to match the light. The junction between the antenna and diode must provide minimal resistance to electrons flowing through it while open, yet prevent leakage while closed.
“The name of the game is maximizing the number of electrons that get excited in the carbon nanotube, and then having a switch that is fast enough to capture them at their peak,” Baratunde Cola, explained. “The faster you switch, the more electrons you can catch on one side of the oscillation.” more>
- Four Georgia Tech Faculty Named IEEE Fellows, Jackie Nemeth
- Sticking to the Schedule was Difficult for Apollo Astronauts, Jason Maderer
- Using Data Mining to Make Sense of Climate Change, Jason Maderer
- Nanostructured Gate Dielectric Boosts Stability of Organic Thin-Film Transistors, John Toon
- Georgia Tech Researchers Awarded $7.5 Million from Office of Naval Research for Secure Stack, Tess Malone
- Hide or Get Eaten, Urine Chemicals Tell Mud Crabs, Ben Brumfield
- Want to Beat Antibiotic-Resistant Superbugs? Rethink Strep Throat Remedies, Ben Brumfield
- Project Will Provide Reaction Kinetics Data for Deterministic Synthesis of Metallic Nanocrystals, John Toon
- WWII Code-Breaking Techniques Inspire Interpretation of Brain Data, Evan Lerner and Ben Brumfield
- One in Five Materials Chemistry Papers May be Wrong, Study Suggests, John Toon
- Piezoelectric Tiles Light the Way for Kennedy Space Center Visitors, John Tibbetts
- Gecko Adhesion Technology Moves Closer To Industrial Uses, Josh Brown
- Nanotexturing Creates Bacteria-Killing Spikes on Stainless Steel Surfaces, John Toon
- Perking Up and Crimping the ‘Bristles’ of Polyelectrolyte Brushes, Ben Brumfield
- Cold Suns, Warm Exoplanets and Methane Blankets, Ben Brumfield
- The Force is Strong: Amputee Controls Individual Prosthetic Fingers, Jason Maderer
- IMPAX Program Accelerates Technology Transition into the Navy, John Toon
- AAAS Honors Cola, Fox and Weitz as Fellows, Ben Brumfield
- A Startup for Every Student, Georgia Parmelee
- The Next Frontier in Industrial Engineering, Georgia Parmelee
Posted in Broadband, EARTH WATCH, Education, Energy & emissions, Healthcare, History, Nature, Science, SPACE WATCH, Technology
Tagged Business improvement, Climate change, Earth, Ecology, Georgia Tech, Manufacturing, Technology
Imaging Technique Unlocks the Secrets of 17th Century Artists
By John Toon – The secrets of 17th century artists can now be revealed, thanks to 21st century signal processing. Using modern high-speed scanners and the advanced signal processing techniques, researchers at the Georgia Institute of Technology are peering through layers of pigment to see how painters prepared their canvasses, applied undercoats, and built up layer upon layer of paint to produce their masterpieces.
The images they produce using the terahertz scanners and the processing technique – which was mainly developed for petroleum exploration – provide an unprecedented look at how artists did their work three centuries ago. The level of detail produced by this terahertz reflectometry technique could help art conservators spot previous restorations of paintings, highlight potential damage – and assist in authenticating the old works.
Beyond old art, the nondestructive technique also has potential applications for detecting skin cancer, ensuring proper adhesion of turbine blade coatings and measuring the thickness of automotive paints.
Without the signal processing, researchers might only be able to identify layers 100 to 150 microns thick. But using the advanced processing, they can distinguish layers just 20 microns thick. Paintings done before the 18th century have been challenging to study because their paint layers tend to be thin, Citrin said. Individual pigments cannot be resolved by the technique, though the researchers hope to be able to obtain that information in the future. more>
- Wearable Computing Ring Allows Users to Write Words and Numbers with Thumb, Jason Maderer
- When Physics Gives Evolution a Leg Up by Breaking One, Ben Brumfield
- Advancing the Path to Organic Electronics Beyond Cell Phone Screens, Ben Brumfield
- A Popular Tool to Trace Earth’s Oxygen History Can Give False Positives, Ben Brumfield
- Contribution statements and author order on research studies still leave readers guessing, Josh Brown
- Apprenticeship Program Helps Students Gain Skills, Péralte C. Paul
- Transfer Technique Produces Wearable Gallium Nitride Gas Sensors, John Toon
- Student Teams Compete in Service Academies Swarm Challenge – with GTRI Assistance, John Toon
- The Kendeda Building for Innovative Sustainable Design Launches on Campus, Lance Wallace
- Creating the Next Code Composers, Stacy Braukman
- Astrobiology Rising at Georgia Tech, A. Maureen Rouhi
- “Instant Replay” for Computer Systems Shows Cyber Attack Details, John Toon
- “Combosquatting” Attack Hides in Plain Sight to Trick Computer UsersExamples of combosquatted domains, John Toon
- Rousing Masses to Fight Cancer with Open Source Machine Learning, Ben Brumfield
- 80 years of the Georgia Tech Research Corporation
- The Force is with Muscle Spindles
- Google Plugs In Georgia Tech Chemistry Team’s Software for its Quantum Computing Product
- National group honors research using lasers and AI to automatically assess health of highway pavement and catalog road signs
Posted in EARTH WATCH, Economic development, Economy, Education, Energy & emissions, Healthcare, History, Science, Technology
Tagged Earth, Georgia Tech, Health, Physics, Space, Technology
Daydreaming is Good. It Means You’re Smart
By Jason Maderer – A new study from the Georgia Institute of Technology suggests that daydreaming during meetings isn’t necessarily a bad thing. It might be a sign that you’re really smart and creative.
“People with efficient brains may have too much brain capacity to stop their minds from wandering,” said Eric Schumacher, the Georgia Tech associate psychology professor who co-authored the study.
Schumacher says higher efficiency means more capacity to think, and the brain may mind wander when performing easy tasks.
How can you tell if your brain is efficient? One clue is that you can zone in and out of conversations or tasks when appropriate, then naturally tune back in without missing important points or steps.
“Our findings remind me of the absent-minded professor — someone who’s brilliant, but off in his or her own world, sometimes oblivious to their own surroundings,” said Schumacher. “Or school children who are too intellectually advanced for their classes. While it may take five minutes for their friends to learn something new, they figure it out in a minute, then check out and start daydreaming.” more>
- Synthetic Hydrogels Deliver Cells to Repair Intestinal Injuries, John Toon
- Wriggling Microtubules Help Explain Coupling of “Active” Defects and Curvature, John Toon
- ‘Y’ a Protein Unicorn Might Matter in Glaucoma, Ben Brumfield
- International Patients Increasingly Seek In Vitro Fertilization Treatment in U.S., Jason Maderer
- Forest Service Funds Georgia Tech Project Using Georgia Timber for Stronger Army Barracks, Jonathan Bowers
- Navigational View of the Brain Thanks to Powerful X-Rays, Ben Brumfield
- Scientists Make First Detection of Neutron Star Collision, Jason Maderer
- Army Grant Supports Development of Intelligent, Adaptive and Resilient Robot Teams, John Toon
- Ceramic Pump Moves Molten Metal at a Record 1,400 Degrees Celsius, John Toon
- New Software Speeds Origami Structure Designs, Josh Brown
- Novel Circuit Design Boosts Wearable Thermoelectric Generators, John Toon
- Paper-Based Supercapacitor Uses Metal Nanoparticles to Boost Energy Density, John Toon
- Fight Against Top Killer, Clogged Arteries, Garners Acclaimed NIH Award, Ben Brumfield
- Georgia Tech Researchers Support DARPA’s New “CHIPS” Initiative, John Toon
- Ammonia Emissions Unlikely To Be Causing Extreme China Haze, Josh Brown
- The Next Frontier in Cybersecurity, Georgia Parmelee
- Annabelle Singer Named Packard Fellow, Jerry Grillo
- The Next Frontier in Medicine, Georgia Parmelee
- Georgia Tech researchers take aim at a super-multi-tasking waste treatment system, A. Maureen Rouhi
Posted in Business, Economic development, Education, Healthcare, Nature, Science, Technology
Tagged Climate change, Georgia Tech, Health, Manufacturing, Physics, Skills, Technology
Driving Cassini: Doctoral Student Controls Spacecraft in Mission’s Final Days
By Jason Maderer – When the Cassini spacecraft plunges into Saturn on September 15 to end a nearly two-decade mission, Georgia Tech student Michael Staab will have a front row seat. It’s almost literally the driver’s seat.
Staab is working at NASA’s Jet Propulsion Laboratory (JPL) in California while pursuing his aerospace engineering doctoral degree in the distance learning program. He’s a Cassini Spacecraft Flight Controller, which means he’s one of only three people authorized to tell the machine what to do and where to go as it orbits Saturn.
The job is almost finished. Just before 8 a.m. (Atlanta time) on Friday, Staab will hear Cassini’s signal for the final time before it dives into the planet’s atmosphere, becoming a part of Saturn.
Prior to attending Georgia Tech, I was a flight test engineering intern at NASA’s Armstrong Flight Research Center at Edwards Air Force Base in California and, later, a test requirements and analysis engineer for Boeing in St. Louis. I had a lot of control room and operations experience, which is exactly what JPL was looking for.
The duty of a flight controller at JPL is fairly straight-forward; we possess absolute command and control authority of the spacecraft when tracking it through the Deep-Space Network. more> https://goo.gl/aAU76G
- Georgia Clinical & Translational Science Alliance Receives $51 Million NIH Grant
- Rogue Wave Analysis Supports Investigation of the El Faro Sinking, John Toon
- Running Roaches, Flapping Moths Create a New Physics of Organisms, John Toon
- As ‘Flesh-Eating’ Leishmania Come Closer, a Vaccine Against Them Does, Too, Ben Brumfield
- Engineering Research Center Will Help Expand Use of Therapies Based on Living Cells, John Toon
- NSF Supports New Mentoring Initiative for Underrepresented Minority Faculty, John Toon
- New Research May Improve Communications During Natural Disasters, Albert Snedeker
- Was the Primordial Soup a Hearty Pre-Protein Stew? Ben Brumfield
- Tech in DC: Intersecting Science and Policy, Victor Rogers
Posted in Communication industry, Economic development, Economy, Education, History, Nature, Net, Science, Technology
Tagged Ecology, Georgia Tech, Health, Industrial economy, Physics, Skills, Technology
By T.J. Becker – Cities have been around for thousands of years, so urbanization is hardly a new phenomenon — but it’s happening now at an unprecedented pace.
In 1950 about 30 percent of the world’s population lived in cities, a number that shot up to nearly 55 percent by 2016 and is expected to hit 60 percent by 2030, according to United Nations statistics. This dramatic growth brings challenges on a variety of fronts, transforming “smart cities” from a catchy phrase into a critical endeavor.
“Smart cities is a highly complex area, encompassing everything from resiliency and environmental sustainability to wellness and quality of life,” said Elizabeth Mynatt, executive director of Georgia Tech’s Institute for People and Technology (IPaT) and distinguished professor in the College of Computing, who is co-chairing the new council. “Although Georgia Tech has been working in this area for some time, we’re organizing research so we can be more holistic and have combined impact.”
“Instead of discrete projects, we’re moving into a programmatic approach,” agreed Jennifer Clark, associate professor of public policy and director of Georgia Tech’s Center for Urban Innovation. “Smart cities research touches on everything from computing and engineering to the social sciences. It’s a different way of thinking about technology — not just in the private sector but also the public sector — so we make cities more efficient and economically competitive places.” more> https://goo.gl/DtKr9K
- Cosmos in the Cranium, Ben Brumfield
- Alzheimer’s: Killing the Mind First, Ben Brumfield
- It’s Gonna Be a Bright, Sunshiny Day, Péralte C. Paul
- Delta Officially Opens New Advanced Manufacturing Facility at Georgia Tech, Lance Wallace
- Climbing Stairs Just Got Easier with Energy-Recycling Steps, Jason Maderer
- Ants Build Sinking Eiffel Towers When Trying to Escape, Jason Maderer
- Meniscus-Assisted Technique Produces High Efficiency Perovskite PV Films, John Toon
- Unique 3-D Printed Models Could Improve Patient Outcomes in Heart Valve Replacements, Josh Brown
- Tiny “Tornado” Boosts Performance of Electrospray Ionization Mass Spectrometry, John Toon
- Microneedle Patches for Flu Vaccination Successful in First Human Clinical Trial, Holly Korschun
- Topsy-Turvy Motion Creates Light Switch Effect at Uranus, Jason Maderer
- Thwarting Metastasis by Breaking Cancer’s Legs with Gold Rods, Ben Brumfield
- Bacteria-Killing Virus Teams Up with Animal Immune Response to Cure Acute Infections, Joshua Weitz, Laurent Debarbieux, Dwayne Roach and Chung Yin (Joey) Leung
- Can eclipses still uncover surprises for 21st-century scientists? Renay San Miguel
- Georgia Tech Partners with USC for $6.8 Million DARPA Project, Albert Snedeker
Posted in Broadband, Business, Construction, Economic development, Economy, Education, Energy & emissions, Healthcare, History, Leadership, Nature, Net, Science, Technology, Transportation
Tagged Alzheimer, Brain, Cranium, energy-recycling stairs, Georgia Tech, Renewable energy, Smart City, Urbanization
Researchers Create 3-D Printed Tensegrity Objects Capable of Dramatic Shape Change
By Ke Liu, Jiangtao Wu, Glaucio H. Paulino, and H. Jerry Qi – A team of researchers from the Georgia Institute of Technology has developed a way to use 3-D printers to create objects capable of expanding dramatically that could someday be used in applications ranging from space missions to biomedical devices.
The new objects use tensegrity, a structural system of floating rods in compression and cables in continuous tension. The researchers fabricated the struts from shape memory polymers that unfold when heated.
“Tensegrity structures are extremely lightweight while also being very strong,” said Glaucio Paulino, a professor in Georgia Tech’s School of Civil and Environmental Engineering. “That’s the reason there’s a heavy amount of interest right now in researching the use of tensegrity structures for outer space exploration. The goal is to find a way to deploy a large object that initially takes up little space.” more> https://goo.gl/bVJHjf
- Boeing, Georgia Tech Unveil New Research Center, Laura Diamond
- Selfies: We Love How We Look and We’re Here to Show You, Jason Maderer
- Drug Design Strategy Boosts the Odds Against Resistance Development, John Toon
- Wildfires Pollute Much More Than Previously Thought, Ben Brumfield
- Robot Uses Deep Learning and Big Data to Write and Play its Own Music, Jason Maderer
- Mind Over Muscles: How the Brain Hinders Individual Muscle Control, Jason Maderer
- Rattling DNA Hustles Transcribers to Targets, Ben Brumfield
- New Computing System Takes Its Cues from Human Brain, Josh Brown
- Researchers Uncover New Instruction Manual to Repair Broken DNA, Drexel University
- New Transplant Technology Could Benefit Patients with Type 1 Diabetes, John Toon
- Social Media Study Identifies Mental Health Culture at Top-Ranked Campuses, Jason Maderer
- Gravitational Waves Detected, Confirmed for Third Time, Jason Maderer
- Startups Have a New Way to ‘Engage’ With Companies, Georgia Tech, Laura Diamond
Posted in Economic development, Economy, Education, Energy, Healthcare, Nature, Science, Technology
Tagged 3-D printing, Drug design, drug resistance, Georgia Tech, Research, Selfie, Tensegrity structures, Wildfire
Surprising twist in confined liquid crystals: A simple route to developing new sensors
By Karthik Nayani, Jinxin Fu, Rui Chang, Jung Ok Park, and Mohan Srinivasarao – To answer some fundamental questions pertaining to the material’s phase behavior, the researchers used the microscopes to observe the molecules’ textures when they were confined to droplets known as tactoids.
“Surprisingly, we found a configuration that hasn’t been seen before in the 70 years that people have been studying liquid crystals,” said Mohan Srinivasarao, a professor in the Georgia Tech School of Materials Science and Engineering. “Historically, liquid crystals in tactoids conform to what is known as a bipolar and a bipolar configuration with a twist. At lower concentrations, we found that these liquid crystals arrange in a concentric fashion, but one that appears to be free of a singular defect.”
The researchers then used a simple model of the aggregation behavior of these molecules to explain these surprising results. Further, spectroscopic experiments using polarized Raman microscopy were performed to confirm their findings.
These new findings add to the growing understanding of how chromonic liquid crystals could be used in sensing applications, Srinivasarao said. more> https://goo.gl/YVq0TE
- “First Arrival” Hypothesis in Darwin’s Finches Gets Some Caveats, John Toon.
- Controlling a Robot is Now as Simple as Point and Click, Jason Maderer
- Swarms of Autonomous Aerial Vehicles Test New Dogfighting Skills, John Toon
- Siemens Opens Innovation Center in Tech Square, Laura Diamond
- Behind the Iron Curtain: How Methane-Making Microbes Kept the Early Earth Warm, John Toon
- Georgia Tech Researcher Honored with Alan T. Waterman Award, John Toon
- When It Comes to Size, Sound Matters in Ads, Josh Brown
- New 3-D Printing Method Creates Shape-Shifting Objects, Josh Brown
- Women of Robotics, Jason Maderer
- Major League Machines
- Creating the Next in Robotics, Jason Maderer
- Georgia Tech, Virginia Tech, UVA Win at ACC InVenture Prize, Laura Diamond
- Warped Reality: virtual Trip to Hyperbolic Space, John Toon
- Hair Spacing Keeps Honeybees Clean During Pollination, Jason Maderer
- Exosomes Have a Sense of Urgency, Jerry Grillo
- Georgia Tech Launches Big IDEaS in Data Science, Jennifer Salazar
- The Perfect Patient, Stacy Braukman
New Projects Create a Foundation for Next-Gen Flexible Electronics
By Josh Brown – Four projects set to move forward at the Georgia Institute of Technology aim to lay the groundwork for manufacturing next-generation flexible electronics, which have the potential to make an impact on industries ranging from health care to defense.
Researchers at Georgia Tech are partnering with Boeing, Hewlett Packard Enterprises, General Electric, and DuPont as well other research institutions such as Binghamton University and Stanford University on the projects.
Flexible electronics are circuits and systems that can be bent, folded, stretched or conformed without losing their functionality. The systems are often created using machines that can print components such as logic, memory, sensors, batteries, antennas, and various passives using conductive ink on flexible surfaces. Combined with low-cost manufacturing processes, flexible hybrid electronics unlock new product possibilities for a wide range of electronics used in the health care, consumer products, automotive, aerospace, energy and defense sectors.
“Flexible electronics will make possible new products that will help us address problems associated with food supply, clean water, clean energy, health, infrastructure, and safety and security,” said Suresh Sitaraman, a professor in the George W. Woodruff School of Mechanical Engineering, who is leading Georgia Tech’s flexible electronics activities. more> https://goo.gl/qjx3UT
- CauteryGuard Wins the InVenture Prize, Laura Diamond
- Empathy from the Sick May be Critical to Halting Disease Outbreaks, John Toon
- China’s Severe Winter Haze Tied to Climate Change, John Toon
- From the Butterfly’s Wings to the Tornado: Predicting Turbulence, Ben Brumfield
- Radiation from Nearby Galaxies Helped Fuel First Monster Black Holes, Says Study, Jason Maderer
- Stem Cell Treatment May Restore Vision to Patients with Damaged Corneas, Charlene Betourney
- New Nanofiber Marks Important Step In Next Generation Battery and Water Electrolysis Development, Josh Brown
- Understanding What’s Happening Inside Liquid Droplets, John Toon
- Brake Dust May Cause More Problems Than Blackened Wheel Covers, Josh Brown
- Study Reveals Complication Predictors in Children with Crohn’s Disease, Crohn’s & Colitis Foundation
- Chiral Metamaterial Produces Record Optical Shift Under Incremental Power Modulation, John Toon
- Once Overlooked, Uninitialized-Use ‘Bugs’ May Provide Portal for Hacker Attacks, Ben Snedeker
- Triboelectric Nanogenerators Boost Mass Spectrometry Performance, John Toon
- How Protein Misfolding May Kickstart Chemical Evolution, Carol Clark
- Howard Chosen for Atlanta Magazine Honor, Jackie Nemeth
- Letting the Structure Do the Work, Massimo Ruzzene
- Study sheds light on key role for ‘rare’ aquatic microbes in dealing with pollution, balancing ecosystems, Kostas T. Konstantinidis
- Danger in the air? Brown wins NSF CAREER grant to find out, Joe Brown
Posted in Broadband, Business, Communication industry, Economic development, Economy, Education, Energy & emissions, Healthcare, Nature, Product, Science, Technology, Transportation
Tagged Broadband, Business improvement, Climate change, Ecology, Georgia Tech, Health, Internet, Manufacturing, Technology