News
A greener internet of things with no wires attached

Wirelessly powered electronics developed by KAUST researchers could help to make internet of things technology more environmentally friendly.
« A greener internet of things with no wires attached
Newswise — Emerging forms of thin-film device technologies that rely on alternative semiconductor materials, such as printable organics, nanocarbon allotropes and metal oxides, could contribute to a more economically and environmentally sustainable internet of things (IoT), a KAUST-led international team suggests.
The IoT is set to have a major impact on daily life and many industries. It connects and facilitates data exchange between a multitude of smart objects of various shape and size — such as remote-controlled home security systems, self-driving cars equipped with sensors that detect obstacles on the road, and temperature-controlled factory equipment — over the internet and other sensing and communications networks.
This burgeoning hypernetwork is projected to reach trillions of devices by next decade, boosting the number of sensor nodes deployed in its platforms.
Current approaches used to power sensor nodes rely on battery technology, but batteries need regular replacement, which is costly and environmentally harmful over time. Also, the current global production of lithium for battery materials may not keep up with the increasing energy demand from the swelling number of sensors.
Wirelessly powered sensor nodes could help achieve a sustainable IoT by drawing energy from the environment using so-called energy harvesters, such as photovoltaic cells and radio-frequency (RF) energy harvesters, among other technologies. Large-area electronics could be key in enabling these power sources.
KAUST alumni Kalaivanan Loganathan, with Thomas Anthopoulos and coworkers, assessed the viability of various large-area electronic technologies and their potential to deliver ecofriendly, wirelessly powered IoT sensors.
Large-area electronics have recently emerged as an appealing alternative to conventional silicon-based technologies thanks to significant progress in solution-based processing, which has made devices and circuits easier to print on flexible, large-area substrates. They can be produced at low temperatures and on biodegradable substrates such as paper, which makes them more ecofriendly than their silicon-based counterparts.
Over the years, Anthopoulos’ team has developed a range of RF electronic components, including metal-oxide and organic polymer-based semiconductor devices known as Schottky diodes. “These devices are crucial components in wireless energy harvesters and ultimately dictate the performance and cost of the sensor nodes,” Loganathan says.
Key contributions from the KAUST team include scalable methods for manufacturing RF diodes to harvest energy reaching the 5G/6G frequency range. “Such technologies provide the needed building blocks toward a more sustainable way to power the billions of sensor nodes in the near future,” Anthopoulos says.
The team is investigating the monolithic integration of these low-power devices with antenna and sensors to showcase their true potential, Loganathan adds.
Journal Link: Nature Electronics
Source: King Abdullah University of Science & Technology (KAUST)
News
NASA, Boeing to Host Media Briefing, Provide Starliner Update
NASA and Boeing will host a media teleconference at 2 p.m. EDT Wednesday, March 29, to provide an update on the Crew Flight Test (CFT) of the CST-100 Starliner spacecraft to the International Space Station.

NASA and Boeing will host a media teleconference at 2 p.m. EDT Wednesday, March 29, to provide an update on the Crew Flight Test (CFT) of the CST-100 Starliner spacecraft to the International Space Station.
Managers will share a mission status and discuss upcoming milestones ahead of Starliner’s first flight with astronauts prior to certifying the spacecraft and systems for regular crew rotation flights to the space station for NASA’s Commercial Crew Program.
Audio coverage of the teleconference will livestream on the agency’s website.
The briefing participants are:
- Steve Stich, manager, NASA’s Commercial Crew Program
- Joel Montalbano, manager, NASA’s International Space Station Program
- Mark Nappi, vice president and program manager, CST-100 Starliner, Boeing
To participate in the call, media must RSVP no later than one hour prior to the start of the event to: [email protected].
The Starliner spacecraft will launch on a United Launch Alliance Atlas V rocket from Space Launch Complex-41 at Cape Canaveral Space Force Station in Florida. The demonstration flight will carry two NASA astronaut test pilots, Butch Wilmore and Suni Williams, and will prove the end-to-end capabilities of the Starliner system.
Find out more about the Commercial Crew Program at:
https://www.nasa.gov/commercialcrew
Source: NASA
astronomy
A Spectacular Aurora dazzles Skywatchers
Geomagnetic storm on the sun caused a stunning display of the Aurora Borealis to be visible as far south as New Mexico, Arizona, Oklahoma, and Virginia.
On March 23, 2023, a geomagnetic storm on the sun caused a stunning display of the Aurora Borealis to be visible as far south as New Mexico, Arizona, Oklahoma, and Virginia. The Northern Lights, a natural phenomenon caused by charged particles from the sun interacting with the Earth’s magnetic field, are usually only visible in the far north. However, this storm caused a rare opportunity for those in more southern regions to witness the incredible light show.
Earth-Sky: https://earthsky.org/earth/aurora-photos-geomagnetic-storm-march-23-24-2023/
Business and Finance
Economics expert explains how consumer price reports show ‘inflation is not done yet’
The statistics from these reports have economists predicting that the Federal Reserve will continue to raise interest rates to get inflation under control.
Expectations that inflation has eased fueled recent stock market gains, but results from two major price-tracking indexes came in higher than expected, dousing that optimism with cold water. The statistics from these reports have economists predicting that the Federal Reserve will continue to raise interest rates to get inflation under control.
“The latest figures underscore the risks of persistently high inflation. Much of the easing that was celebrated at the end of last year has been erased,” said David Bieri, an economics professor for Virginia Tech’s School of Public and International Affairs. He answered a few questions about the persistence of inflation and the Federal Reserve’s efforts to reverse it.
Q: What is the difference between the Consumer Price Index (CPI) and the Personal Consumption Expenditures Price Index (PCE)?
“The CPI is a measure of the average change over time in the prices paid by urban consumers for a basket of goods and services. This basket includes commonly purchased items such as food, housing, clothing, transportation, and medical care. The rate of inflation (or deflation) is then inferred by comparing the price of this basket to a base period. The PCE is the one used by the Federal Reserve. Unlike the CPI, the PCE measures not just goods and services for urban consumers, but the prices of all goods and services purchased by households. While the CPI uses a fixed basket of goods and services, the PCE uses a changing basket of goods and services that reflects consumers’ evolving spending patterns. Also, the PCE incorporates data on the quality of goods and services.”
Q: What can be deduced about inflation and the economy from these new statistics?
“Different components of the indexes react to different influences of the economic process, and they also do so at different speeds, or as economists like to say, with different lags. For example, fuel and gas prices react with very little delay and if the price of crude oil goes up, it does not take long for these effects to show up. But this is not the case for other important components. Quite a bit of the recent uptick in inflation has to do with the fact that it has taken so long for the post-COVID related upswing in housing to show up in the data. As for the most recent PCE numbers, these were unexpected and point in the direction of more entrenched inflation. In other words, inflation is not done yet.”
Q: What do these results indicate about the Federal Reserve’s efforts to curb inflation?
“The Fed has to be patient. If we take the image of interest rates working like a brake pedal, the Fed is driving a car on a windy road with a blacked-out windscreen and when it brakes, it can only guess how soon the car — that is, the economy — will slow down, let alone by how much and when the next bend will be. However, the Fed has one key trick up its sleeve: unlike the hapless driver of our car, the Fed can influence how many bends in the road might show up in the future. It does this by something that we call ‘forward guidance,’ which is a wonky term for how the Fed’s attempts influence consumer and market expectations of consumers and market participants. Essentially the Fed is saying that if we stop believing there will be inflation in the future, there actually won’t be any.”
About Bieri
David Bieri is an associate professor of urban affairs in the School of Public and International Affairs and an associate professor of economics. He also holds an appointment in the Global Forum on Urban and Regional Resilience. His teaching interests are at the intersection of public finance, monetary theory, and history of economic thought. He has held various senior positions at the Bank for International Settlements in Basel, Switzerland. Prior to his work in central banking, he worked in investment banking in London and Zurich. View Bieri’s full bio.
Source: Virginia Tech
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