Left-tail risk (LT) stocks are those whose returns fall into the extreme end on the left side of the return distribution. In the hopes of mean-reverting to the normal price, investors usually hold on to these stocks. However, contrary to mean-reverting expectations, these stocks that have experienced extreme losses and high tail risks in the past tend to continue declining in the future, resulting in financial losses. This phenomenon, referred to as left-tail momentum (LTM), appears to challenge the traditional notion of a positive relationship between risk and return. To investigate this market anomaly, a team of researchers, led by Prof. Eom from the School of Business at Pusan National ...

A team of scientists, led by the researcher at the IAC and the University of La Laguna (ULL) Sebastién Comerón, has found that the galaxy NGC 1277 does not contain dark matter.This is the first time that a massive galaxy (it has a mass several times that of the Milky Way) does not show evidence for this invisible component of the universe. “This result does not fit in with the currently accepted cosmological models, which include dark matter” explains Comerón. In the current standard model cosmology massive galaxies contain substantial quantities of dark matter, a type of matter which does not interact in the same ...

Finding sustainable and clean fuels is crucial in today’s global energy and climate crisis. One promising candidate that is increasingly gaining relevance is hydrogen. However, today’s industrial hydrogen production still has a considerable CO2 footprint, especially considering processes like steam reforming or non-sustainable electrolysis. A team led by Prof. Dominik Eder from the Institute of Materials Chemistry (TU Wien) is therefore focusing on the development of environmentally friendly processes for obtaining hydrogen, for example by photocatalysis. This process enables the conversion of ...

Biomass, mainly composed of lignocellulose and vegetable oil, has been acclaimed as one of the most promising sustainable sources of raw carbon material for the synthesis of transport fuels and value-added chemicals. The catalytic conversion of lignocellulose/vegetable oil and their related derivatives has attracted great attention in biomass valorization. Many elegant methods including hydrolysis, dehydration, hydrogenation, hydrogenolysis, oxidation, etherification, esterification, amination, aldol condensation, ...

When raindrops fall from the sky, they can produce a small amount of energy that can be harvested and turned into electricity. It is a small-scale version of hydropower, which uses the kinetic energy of moving water to produce electricity. Researchers have proposed that the energy collected from raindrops could be a potential source of clean, renewable power. However, this technology has been difficult to develop on a large scale, which has limited its practical application.   To collect raindrop energy, a device called a triboelectric ...

Homologous recombination (HR) is an important process that plays multiple crucial roles during meiosis, a type of cell cycle dedicated to sexual reproduction. During HR, homologous DNA molecules exchange their genetic material. During the meiotic prophase, DNA are clipped throughout the genome, forming numerous DNA double-strand breaks. Such DNA breaks attract homologous recombination enzymes, which promote pairing of homologous chromosomes. Dmc1 is one such meiosis-specific recombinase in eukaryotes (organisms that have a clearly defined nucleus), ...

Covalent organic frameworks (COFs) are versatile materials composed of interconnected organic molecules held together by covalent bonds. These frameworks can be constructed in two-dimensional or three-dimensional (3D) forms which possess a unique combination of low density, high surface area, and easily tunable properties. Among the various types of COFs, imine-linked COFs have garnered considerable attention owing to their exceptional thermal and chemical stability as well as their broad scope of monomeric starting materials. However, traditional bulk synthetic methods for COFs often yield powders that are insoluble ...

As necessary as cooling technologies are, we’re still operating on an outdated technology that can be considered a significant contributor to global warming and greenhouse gas emissions. Currently, vapor compression cycle-based cooling (VCC) is the standard for reliable cooling of air conditioning and refrigeration, but by switching to electrocaloric cooling (EC) researchers are hoping to create a more environmentally friendly, scalable and compressor-free method of cooling to benefit businesses, families and the environment.   The researchers published their work in iEnergy on ...

(Toronto July 19, 2023) Fully open access publisher JMIR Publications has acquired the Online Journal of Public Health Informatics (OJPHI), expanding its portfolio to 35 gold open access journals. This acquisition marks an open access milestone in JMIR Publications’ continued mission to keep openness at the heart of what it does. Indexed in PubMed Central, OJPHI has been delivering the latest developments in the emerging field of public health informatics since 2009. The journal publishes research articles, book reviews, technology reviews, working papers, interviews, commentaries, and handpicked student capstone projects.  All ...

JMIR Medical Education (2023 Impact Factor 5.2) and Guest Editors: Amir Tal, PhD, and Oren Asman, LLD welcome submissions to a special theme issue examining "Responsible Design, Integration, and Use of Generative AI in Mental Health" This special theme issue aims to unite various stakeholders in exploring the responsible use of generative artificial intelligence (GAI) within the mental health domain. The goal is to curate a collection of articles that examine the advantages, challenges, and potential risks associated with deploying GAI models ...

Prof Sei-ichi Tsujimura of the Nagoya City University and Prof Su-Ling Yeh of National Taiwan University and Kagoshima University, have discovered that our visual acuity (contrast sensitivity) can be improved by using a light with a special spectrum that can selectively stimulate melanopsin cells in the retina. Background The retina of our eye contains cone photoreceptor cells, which identify colors in bright environment, and rod photoreceptor cells, which work in the dark. It has long been thought that humans see and identify objects by these two types of photoreceptor cells alone. ...

Intermittent rivers and ephemeral streams are the world's dominant river ecosystem, yet monitoring and management typically focus on rivers that flow year round. Writing in BioScience, Amélie Truchy of the French National Research Institute for Agriculture, Food, and the Environment (INRAE) and colleagues describe the problem, as well as a potential solution: citizen science.                 The authors discuss the results from a new app, DRYRivERS, which allows scientist and nonscientist users alike to record data on ephemeral streams and intermittent ...

For millions of Americans who have heart surgery or experience cardiovascular complications, like heart attack or heart failure, they may be encouraged to participate in cardiac rehabilitation. The medically supervised program combines lifestyle changes, education and physical activity to help patients recover and reduce their risk of future problems. A Michigan Medicine study now finds that people who participate in cardiac rehabilitation have a decreased risk of death years after surgery, with a trend towards better outcomes in patients who attend more sessions. “Time and time again, cardiac rehabilitation has been shown to ...

As life expectancy increases worldwide, age-associated diseases such as osteoporosis are having an increasing impact. Although early detection could help physicians intervene as soon as possible — when treatment might offer the greatest benefit — this type of detection is not yet possible with current osteoporosis diagnostic tests. Now, researchers reporting in ACS Central Science have developed a biosensor that could someday help identify those most at risk for osteoporosis using less than a drop of blood. Early intervention is critical to reducing the morbidity and mortality associated with osteoporosis, a condition characterized by an elevated ...

Whether enjoyed on its own or mixed into a latte, Americano or even a martini, espresso provides an ultra-concentrated jolt of caffeine to coffee lovers. But it might do more than just wake you up. Research now published in ACS’ Journal of Agricultural and Food Chemistry shows that, in preliminary in vitro laboratory tests, espresso compounds can inhibit tau protein aggregation — a process that is believed to be involved in the onset of Alzheimer’s disease. Roughly half of all Americans drink coffee every day, and espresso is a popular way to consume ...

Almost everyone has a bag of veggies shoved into the dark recesses of their freezer that’s now essentially an unrecognizable block of ice crystals. And when thawed, foods damaged by excessive ice lose their texture and become mushy. Now, researchers reporting in ACS’ Journal of Agricultural and Food Chemistry have shown that broken-down soy proteins can prevent ice crystal growth and could be especially useful for preserving frozen vegan foods or biological samples. Some animals that ...

The discovery of antibiotics in 1928 was a major turning point in the history of medicine. For the first time since the dawn of human civilization, doctors had gained access to an extremely powerful and effective tool to fight against a wide variety of bacterial infections. Today, bacterial diseases that were previously a death sentence can be cured, and infections following surgery or chemotherapy can be prevented or treated more effectively. Unfortunately, the worldwide use (and abuse) of antibiotics led to the emergence of drug-resistant bacterial strains. Over time, bacteria that could normally be killed by ...

Eighty percent of older adults see the benefit of tests that can give an early warning that a person’s memory and thinking abilities have started to decline, a new poll of people age 65 to 80 finds. And 60% think that health care providers should offer cognitive screening, in the form of brief memory tests, to all older adults every year. If they had a cognitive screening test and it showed signs of trouble, the vast majority of those polled said it would spur them to take action to protect their brain health (96%) and adjust their financial and health ...

Using the Atacama Large Millimeter/submillimeter Array (ALMA), astronomers have found the possible ‘sibling’ of a planet orbiting a distant star. The team has detected a cloud of debris that might be sharing this planet’s orbit and which, they believe, could be the building blocks of a new planet or the remnants of one already formed. If confirmed, this discovery would be the strongest evidence yet that two exoplanets can share one orbit. “Two decades ago it was predicted in theory that pairs of planets of similar mass may share the same orbit around their star, the so-called Trojan or co-orbital planets. For the first time, we have found evidence ...

HOUSTON – (July 19, 2023) – Rice University’s Michael Wong was named a fellow to the Royal Society of Chemistry (RSC), the oldest chemical society in the world, whose mission is to “advance excellence in the chemical sciences.” More than 180 years old, the United Kingdom-based chemical society has over 54,000 members worldwide. “It’s a confirmation that the work we do in our group is something that people appreciate and is making a meaningful contribution ...

Genoa (Italy), 19 July 2023 – Researchers at Istituto Italiano di Tecnologia (Italian Institute of Technology - IIT) and Università degli Studi di Milano-Bicocca (University of Milan-Bicocca), in cooperation with Acquario di Genova (Genoa Aquarium) in Italy, have recently published a study in ACS Applied Materials and Interfaces, which demonstrates the efficacy of curcumin, a natural antioxidant substance extracted from turmeric, in reducing coral bleaching, a phenomenon caused primarily by climate change. The research group developed a biodegradable biomaterial to deliver the molecule without ...

About The Study: The results of this study of 1.6 million patients suggest that residence within more disadvantaged neighborhoods was associated with higher risk of dementia among older veterans integrated in a national health care system. Authors: Christina S. Dintica, Ph.D., of the University of California, San Francisco, is the corresponding author. To access the embargoed study: Visit our For The Media website at this link https://media.jamanetwork.com/ (doi:10.1001/jamaneurol.2023.2120) Editor’s Note: Please see the article for additional information, including other authors, author ...

A study published in the Journal of the American Geriatrics Society found that immediately after retirement, white adults tended to experience a significant decline in cognitive function, whereas Black adults experienced minimal cognitive decline. White men showed the steepest post-retirement cognitive decline across sex/race combinations, whereas Black women showed the least decline. White women performed better cognitively at retirement than other race/sex subgroups, and after retirement, their cognitive functioning declined at a rate that was slightly ...

New research published in Contemporary Economic Policy indicates that Disability Insurance (DI) may improve economic opportunities for children whose parents have health conditions that limit work. The study included 52,575 parent-child pairs in the United States. When investigators examined economic mobility patterns for children whose parents reported work-limiting disability, they found that children had less upward economic mobility and more downward mobility relative to children of non-limited parents. Children of parents ...

A randomized controlled trial conducted in Canada and published in the Journal of Child Psychology and Psychiatry found that Nurse-Family Partnership (NFP), a nurse-home visiting program, improved child language and mental health at age 2 years when compared with existing services. Rates of child injuries and maternal subsequent pregnancies were similar in the two groups. This real-world effectiveness trial involved sustained research-policy-practice collaborations from 2011–2022. Investigators successfully reached/enrolled and sustained engagement with 739 participants (368 NFP, 371 comparison) and their 737 children for ...