PRESS-NEWS.org - Press Release Distribution
PRESS RELEASES DISTRIBUTION

Super Radar: Breakthrough radar research overcomes a nearly century-old trade-off between wavelength and distance resolution

2023-08-02
(Press-News.org) New interference radar functions employed by a team of researchers from Chapman University and other institutions improve the distance resolution between objects using radar waves. The results may have important ramifications in military, construction, archaeology, mineralogy and many other domains of radar applications.

This first proof-of-principle experiment opens a new area of research with many possible applications that can be disruptive to the multi-billion dollar radar industry. There are many new avenues to pursue both in theory and experiment.

The discovery addresses a nine decades-old problem that requires scientists and engineers to sacrifice detail and resolution for observation distance — underwater, underground, and in the air. The previous bound limited the distance estimated between objects to be one quarter of the wavelength of radio waves; this technology improves the distance resolution between objects using radar waves.

“We believe this work will open a host of new applications as well as improve existing technologies,” says John Howell, the lead author of the article published today in Physical Review Letters and highlighted as an Editors’ Suggestion paper (see Radar Resolution Gets a Boost). “The possibility of efficient humanitarian demining or performing high-resolution, non-invasive medical sensing is very motivating,” Howell adds.

Howell and a team of researchers from the Institute for Quantum Studies at Chapman University, the Hebrew University of Jerusalem, the University of Rochester, the Perimeter Institute and the University of Waterloo have demonstrated range resolution more than 100 times better than the long-believed limit. This result breaks the trade-off between resolution and wavelength, allowing operators to use long wavelengths and now have high spatial resolution.

By employing functions with both steep and zero-time gradients, the researchers showed that it was possible to measure extremely small changes in the waveform to precisely predict the distance between two objects while still being robust to absorption losses. To an archaeologist this creates the ability to distinguish between a coin deep underground from a pottery shard.

The breakthrough idea relies on the superposition of specially-crafted waveforms. When a radio wave reflects from two different surfaces, the reflected radio waves add to form a new radio wave. The research team uses purpose-designed pulses to generate a new kind of superposed pulse. The composite wave has unique sub-wavelength features that can be used to predict the distance between the objects.

“In radio engineering, interference is a dirty word and thought of as a deleterious effect. Here, we turn this attitude on its head, and use wave interference effects to break the long-standing bound on radar ranging by orders of magnitude,” says Andrew Jordan, director of Quantum Studies at Chapman University. “In remote radar sensing, only a small amount of the electromagnetic radiation is returned to the detector. The tailored waveforms that we designed have the important property of being self-referencing, so properties of the target can be distinguished from loss of signal.”

Howell adds, “We are now working to demonstrate that it is possible to not only measure the distance between two objects, but many objects or perform detailed characterization of surfaces.”

About Chapman University
Founded in 1861, Chapman University is a nationally ranked private university located in Southern California. Chapman is categorized by the Carnegie Classification as an R2 “high research activity” institution and offers personalized education to more than 10,000 undergraduate and graduate students. The campus has produced a Rhodes Scholar, been named a top producer of Fulbright Scholars, and hosts a chapter of Phi Beta Kappa, the nation’s oldest and most prestigious honor society. Based in the city of Orange, Chapman also includes the Harry and Diane Rinker Health Science Campus in Irvine. In 2019, the university opened its 11th college, Fowler School of Engineering, in its newest facility, Keck Center for Science and Engineering. Learn more about Chapman University: www.chapman.edu.

Media Contacts:
Cerise Valenzuela Metzger, Director of Public Relations | cmetzger@chapman.edu | 714-289-3143
Carly Murphy, Public Relations Coordinator | carmurphy@chapman.edu | Desk: 714-289-3196 | Mobile: 714-497-9683

END


ELSE PRESS RELEASES FROM THIS DATE:

Study finds Black people less likely to be seen at memory clinic than white people

2023-08-02
MINNEAPOLIS – Black people and people living in less affluent neighborhoods—areas with higher poverty levels and fewer educational and employment opportunities— may be less likely to be seen at a memory care clinic compared to white people and people living in neighborhoods with fewer disadvantages, according to new research published in the August 2, 2023, online issue of Neurology®, the medical journal of the American Academy of Neurology.   “Our results are concerning, especially ...

Bullying, suicidal thoughts linked to more frequent headaches in teens

2023-08-02
MINNEAPOLIS – Teens who have been bullied by their peers, or who have considered or attempted suicide, may be more likely to have more frequent headaches than teens who have not experienced any of these problems, according to a study published in the August 2, 2023, online issue of Neurology®, the medical journal of the American Academy of Neurology. The study does not prove that bullying or thoughts of suicide cause headaches; it only shows an association. “Headaches are a common problem for teenagers, but our study looked beyond the biological factors to also consider the psychological and social factors that are associated with headaches,” ...

Study defines disparities in memory care

2023-08-02
Patients who live in less affluent neighborhoods and those from underrepresented racial or ethnic groups are less likely than others to receive specialized care for dementia, including Alzheimer’s disease, a new study from Washington University School of Medicine in St. Louis indicates. Further, the research shows that Black people are more likely than white people to be diagnosed with dementia at a later, more advanced stage, which could contribute to inequities in access to new treatments. The study appears Aug. 2 in the journal Neurology. New medications ...

New analysis shows surgery is safe and effective for people with unruptured brain arteriovenous malformation

2023-08-02
CONTACT: Camille Jewell cjewell@vancomm.com or 202-248-5460   SAN DIEGO—Contrary to the results of a seminal study in the field, a recent analysis presented today at the Society of NeuroInterventional Surgery’s (SNIS) 20th Annual Meeting indicates that surgical approaches (embolization, microsurgery, radiosurgery) for treating selected patients with unruptured arteriovenous malformation (AVM) is safe and effective.   AVMs are tangled blood vessels with abnormal connection between arteries and veins, bypassing the capillary ...

Researchers develop smartphone app that reliably recognizes physical signs of stroke

2023-08-02
CONTACT: Camille Jewell cjewell@vancomm.com or 202-248-5460   SAN DIEGO—Today at the Society of NeuroInterventional Surgery’s (SNIS) 20th Annual Meeting, researchers discussed a smartphone app created that reliably recognizes patients’ physical signs of stroke with the power of machine learning.   In the study, “Smartphone-Enabled Machine Learning Algorithms for Autonomous Stroke Detection,” researchers from the UCLA David Geffen School of Medicine and multiple medical institutions in Bulgaria used data from 240 patients with stroke at four metropolitan stroke centers. Within 72 hours of the ...

Nose-picking healthcare workers were more likely to catch COVID-19 during the pandemic than their colleagues who refrained, per Netherlands cohort study

Nose-picking healthcare workers were more likely to catch COVID-19 during the pandemic than their colleagues who refrained, per Netherlands cohort study
2023-08-02
Nose-picking healthcare workers were more likely to catch COVID-19 during the pandemic than their colleagues who refrained, per Netherlands cohort study ### Article URL:  https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0288352 Article Title: Why not to pick your nose: Association between nose picking and SARS-CoV-2 incidence, a cohort study in hospital health care workers Author Countries: The Netherlands Funding: This work was funded by the Netherlands Organization for Health Research and Development ZonMw (S3 study, grant agreement no. 10430022010023 to M.K.B.) and the Corona ...

Half of popular TikTok videos about Baby Boomers portray older adults negatively, risking reinforcing stereotypes and creating intergenerational conflict

Half of popular TikTok videos about Baby Boomers portray older adults negatively, risking reinforcing stereotypes and creating intergenerational conflict
2023-08-02
Half of popular TikTok videos about Baby Boomers portray older adults negatively, risking reinforcing stereotypes and creating intergenerational conflict ### Article URL:  https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0285987 Article Title: Videos about older adults on TikTok Author Countries: Singapore Funding: We gratefully acknowledge the support of the Social Science Research Council SSHR Fellowship (MOE2018-SSHR-004). The funders had no role in study design, data collection and analysis, decision to ...

Extreme climates may have driven Middle Pleistocene hominins towards (positive) assortative mating and evolution of bigger brains, according to economic model of climate change impacts

2023-08-02
Extreme climates may have driven Middle Pleistocene hominins towards (positive) assortative mating and evolution of bigger brains, according to economic model of climate change impacts ### Article URL:  https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0287964 Article Title: An economic model and evidence of the evolution of human intelligence in the Middle Pleistocene: Climate change and assortative mating Author Countries: USA Funding: The author received no specific funding for this work. END ...

Interest in bird feeding surged in over 100 countries worldwide during the COVID-19 lockdowns

Interest in bird feeding surged in over 100 countries worldwide during the COVID-19 lockdowns
2023-08-02
Interest in local bird feeding appears to have ramped up in countries all over the world during the pandemic lockdowns, even in countries not historically noted for bird feeding practices, according to a study published August 2, 2023 in the open-access journal PLOS ONE by Jacqueline Doremus from California Polytechnic State University and Liqing Li from Texas A&M University College Station, US, and Darryl Jones from Griffith University, Australia. Feeding wild birds is a popular nature-based pastime because of its simplicity, low cost, and accessibility in even urban environments. ...

Teamwork environments linked to white US employees going the extra mile

Teamwork environments linked to white US employees going the extra mile
2023-08-02
In an analysis of more than 5,000 people, frequently working in teams was associated with a greater tendency for women and white men to put in extra effort at work, while other links between job conditions and effort varied between genders and ethnoracial groups. Wei-hsin Yu of the University of California, Los Angeles, US, and Janet Chen-Lan Kuo of National Taiwan University, Taiwan, present these findings in the open-access journal PLOS ONE on August 2, 2023. Popular media has recently featured discussion of “quiet ...

LAST 30 PRESS RELEASES:

Older teens who start vaping post-high school risk rapid progress to frequent use

Corpse flowers are threatened by spotty recordkeeping

Riding the AI wave toward rapid, precise ocean simulations

Are lifetimes of big appliances really shrinking?

Pink skies

Monkeys are world’s best yodellers - new research

Key differences between visual- and memory-led Alzheimer’s discovered

% weight loss targets in obesity management – is this the wrong objective?

An app can change how you see yourself at work

NYC speed cameras take six months to change driver behavior, effects vary by neighborhood, new study reveals

New research shows that propaganda is on the rise in China

Even the richest Americans face shorter lifespans than their European counterparts, study finds

Novel genes linked to rare childhood diarrhea

New computer model reveals how Bronze Age Scandinavians could have crossed the sea

Novel point-of-care technology delivers accurate HIV results in minutes

Researchers reveal key brain differences to explain why Ritalin helps improve focus in some more than others

Study finds nearly five-fold increase in hospitalizations for common cause of stroke

Study reveals how alcohol abuse damages cognition

Medicinal cannabis is linked to long-term benefits in health-related quality of life

Microplastics detected in cat placentas and fetuses during early pregnancy

Ancient amphibians as big as alligators died in mass mortality event in Triassic Wyoming

Scientists uncover the first clear evidence of air sacs in the fossilized bones of alvarezsaurian dinosaurs: the "hollow bones" which help modern day birds to fly

Alcohol makes male flies sexy

TB patients globally often incur "catastrophic costs" of up to $11,329 USD, despite many countries offering free treatment, with predominant drivers of cost being hospitalization and loss of income

Study links teen girls’ screen time to sleep disruptions and depression

Scientists unveil starfish-inspired wearable tech for heart monitoring

Footprints reveal prehistoric Scottish lagoons were stomping grounds for giant Jurassic dinosaurs

AI effectively predicts dementia risk in American Indian/Alaska Native elders

First guideline on newborn screening for cystic fibrosis calls for changes in practice to improve outcomes

Existing international law can help secure peace and security in outer space, study shows

[Press-News.org] Super Radar: Breakthrough radar research overcomes a nearly century-old trade-off between wavelength and distance resolution