For text categorization, it is necessary to select a set of features(terms) with high discrimination by using feature selection. In text feature selection, Accuracy2（ACC2）treats terms with same absolute document rate difference but different discrimination equally, which is unreasonable. Existing improved methods (normalized difference measure（NDM）, max-min ratio（MMR）and trigonometric comparison measure（TCM）) based on ACC2 may confuse the importance of rare and sparse terms on account of challenge for parameter selection. To solve the problems, a research team led by Li Zhang published their new research on 15 February 2023 in Frontiers of Computer Science co-published ...

The University of Toronto has been awarded a $200-million grant from the Canada First Research Excellence Fund (CFREF) to revolutionize the speed and impact of scientific discovery through its Acceleration Consortium. The funding – the largest federal research grant ever awarded to a Canadian university – will support the consortium’s work on “self-driving labs” that combine artificial intelligence, robotics and advanced computing to discover new materials and molecules in a fraction of the usual time and cost. Applications include everything from life-saving medications ...

A new study has identified potential broad-spectrum antiviral agents that can target multiple families of RNA viruses that continue to pose a significant threat for future pandemics. The study, led by Gustavo Garcia Jr. in the UCLA Department of Molecular and Medical Pharmacology, tested a library of innate immune agonists that work by targeting pathogen recognition receptors, and found several agents that showed promise, including one that exhibited potent antiviral activity against members of RNA viral families. The ongoing SARS-CoV-2 pandemic, which ...

La Jolla, Calif. (April 28, 2023) — There has been widespread speculation about how advances in artificial intelligence (AI) assistants like ChatGPT could be used in medicine.  A new study published in JAMA Internal Medicine led by Dr. John W. Ayers from the Qualcomm Institute within the University of California San Diego provides an early glimpse into the role that AI assistants could play in medicine. The study compared written responses from physicians and those from ChatGPT to real-world health questions. A panel of licensed healthcare professionals preferred ChatGPT’s responses 79% of the time and rated ChatGPT’s responses as higher quality ...

Neuroscientists have uncovered how exploratory actions enable animals to learn their spatial environment more efficiently. Their findings could help build better AI agents that can learn faster and require less experience. Researchers at the Sainsbury Wellcome Centre and Gatsby Computational Neuroscience Unit at UCL found the instinctual exploratory runs that animals carry out are not random. These purposeful actions allow mice to learn a map of the world efficiently. The study, published today in Neuron, describes how ...

About The Study: The findings of this study suggest that during the COVID-19 pandemic, children and young adults born preterm were more likely to have used health care related to COVID-19 concerns compared with their term-born peers, independent of a history of bronchopulmonary dysplasia or asthma. Further exploration of factors associated with COVID-19–related health care use may facilitate refinement of care models.  Authors: Elisabeth C. McGowan, M.D., of Brown University in Providence, Rhode Island, is the corresponding author.  To access the embargoed study: Visit our For The Media website at this link ...

About The Study: In this study of 195 randomly drawn patient questions from a social media forum, a team of licensed health care professionals compared physician’s and chatbot’s responses. The chatbot responses were preferred over physician responses and rated significantly higher for both quality and empathy. Further exploration of this technology is warranted in clinical settings, such as using chatbot to draft responses that physicians could then edit. Randomized trials could assess further if using AI assistants might ...

About The Study: The results of this study of children with parent-reported attention-deficit/hyperactivity disorder (ADHD) suggest that most were not receiving ADHD medications and had never received outpatient mental health care. Gaps in treatment, which were not directly associated with socioeconomic disadvantage, underscore the challenges of improving communication and access to outpatient mental health care for children with ADHD.  Authors: Mark Olfson, M.D., M.P.H., of Columbia University and the New York State Psychiatric ...

BENTLEY UNIVERSITY The National Institutes of Health (NIH) spent $187 billion for basic or applied research related to 354 of the 356 drugs approved by the FDA from 2010-2019, according to a new study from Bentley University’s Center for Integration of Science and Industry. The study, published in JAMA Health Forum, shows that the amount invested per approved drug by the NIH is comparable to that of reported investment by the biopharmaceutical industry. The article, titled “Comparison of research spending on new drug approvals by the U.S. National Institutes of Health versus industry, 2010-2019,” is the first to compare the total value of NIH and ...

COLUMBUS – Rural women are six times more likely to get timely breast, cervical and colorectal cancer screening with remote outreach that involves interactive education and follow-up support by telephone, according to a new study. Through the Rural Interventions for Screening Effectiveness (RISE) study, researchers with The Ohio State University Comprehensive Cancer Center – Arthur G. James Cancer Hospital and Richard J. Solove Research Institute along with researchers with the Indiana University Melvin and Bren Simon Comprehensive Cancer Center compared the effectiveness ...

Artificial photosynthesis for environmentally friendly food production TUM researchers produce important amino acid from greenhouse gas CO2   Growing demand for food in the world Biotechnological process via methanol as intermediate product Less ground required than for plant cultivation Ensuring the supply of food to the constantly growing world population and protecting the environment at the same time are often conflicting objectives. Now researchers at the Technical University of Munich (TUM) have successfully developed ...

Today the British Ecological Society (BES) has announced the winners of its journal prizes for research published in 2022. The prizes are awarded for the best paper by an early career researcher in seven of the BES journals: Journal of Applied Ecology, Ecological Solutions and Evidence, Functional Ecology, People and Nature, Methods in Ecology and Evolution, Journal of Ecology and Journal of Animal Ecology. The winning papers are selected by the Senior Editors of the journals and the awards will be presented to the winners at the BES Annual Meeting in Belfast at the end of the year. The winners receive a prize of £250, membership of the BES, a year’s subscription to ...

Safer cancer drugs are now one step closer after a new study led by UCL (University College London) researchers found the likely reason that some treatments damage the heart. Modern drugs can be very effective at treating cancer and have led to greatly improved survival rates. However, some cancer treatments can cause damage to the heart, or cardiotoxicity. This damage can present in a range of ways, from a slight change in the heart’s pumping ability to debilitating heart failure. But the ways in which these drugs cause damage ...

Innovating, i.e. the ability to find solutions to new problems or innovative solutions to known problems, it provides crucial benefits for the adaptation and the survival of human beings as well as for animals. What are the characteristics that make specific species or animals to be innovative? A study by the University of Barcelona has analysed this cognitive skill in ungulates, a group of mammals such as dromedaries, horses and goats, characterized by walking on the tip of their toes or hooves. The results show that those individuals that are less integrated ...

NAIROBI, Kenya, 20 April 2023_An international team of researchers, led by Africans, has fully sequenced the genome of a climate resilient bean that could bolster food security in drought-prone regions. The sequencing of the hyacinth bean or ‘lablab bean’ [Lablab purpureus] paves the way for wider cultivation of the crop, bringing nutritional and economic benefits, as well as much needed diversity to the global food system. The plant is native to Africa and is cultivated throughout the tropics producing highly nutritious beans, which are used for food ...

Large-scale circulation anomalies are a key factor in the transportation of water vapor and changes in climate. For tropical and subtropical regions, an atmospheric circulation field not only determines the characteristics of the weather situation but also influences the atmospheric circulation in the middle and high latitudes, as well as the global climate, through the transport of energy and angular momentum. At the same time, whilst lightning can serve as a global tropical “thermometer” and an indicator of water vapor in the upper troposphere, the driving role of the circulation situation for it needs to be further analyzed. In a paper recently ...

During photosynthesis, the green pigment chlorophyll in algae and plants absorbs most of the energy from incoming light. Chlorophyll gets excited and transfers this energy to the energy-harvesting protein complexes photosystem I (PSI) and II (PSII). However, some of this energy dissipates as heat or chlorophyll a fluorescence (ChlF). Changes in the environment or plant physiology that affect PSII also alter ChlF, which can therefore be used as a fast, sensitive, and non-destructive indicator of PSII status. Indeed, ChlF is a powerful tool for assessing multiple aspects of photosynthesis. Though ChlF measurements ...

FOR IMMEDIATE RELEASE What: Pediatric Academic Societies (PAS) 2023 Meeting When: April 27 to May 1 Where: Walter E. Washington Convention Center (801 Mt Vernon Pl NW, Washington, DC 20001) Johns Hopkins Children’s Center researchers will present on numerous topics during the PAS 2023 meeting, including: System-Level Approach to Improve First COVID-19 Vaccine Dose Uptake in a Primary Care Setting: The Value of Health Educators Monday, May 1, 1 to 2:30 p.m. Eastern time Convention Center: 204 C Oral Abstract COVID-19 vaccination rates among youth ...

To gain a clearer understanding of the differences between childhood cancer patients when it comes to the impact of radiation therapy on cognition, scientists at St. Jude Children’s Research Hospital studied the effect of their environment. Their work showed that children with supportive environments fared better than children living in neighborhoods with economic hardship. Those in areas with greater economic hardship had worse baseline and long-term cognitive outcomes. The results imply that policies and resources providing support at a neighborhood level ...

COLUMBUS, Ohio – Researchers at The Ohio State University have developed a framework for quantifying how well countries around the world are doing at providing adequate food, energy and water to their citizens without exceeding nature’s capacity to meet those needs.  They found that only 6% of 178 countries provide for all their citizens in an ecologically sustainable way in both carbon sequestration and water consumption. The study found that while 67% of nations operate safely and sustainably in regard to water use, only 9% do in regard to carbon sequestration, ...

The International Vaccine Institute, an international organization with a mission to discover, develop, and deliver safe, effective, and affordable vaccines for global health, began clinical development of DuoChol, a new low-cost oral cholera vaccine (OCV) in capsule form. With funding support from the Wellcome Trust and the Swedish government, IVI is preparing to conduct a Phase I clinical trial of the vaccine in Sweden.   Scientists at the University of Gothenburg developed DuoChol, a dry formulation inactivated bacterial whole cell/cholera toxin B subunit OCV with a similar composition as the world’s first WHO-prequalified OCV, DUKORAL®. ...

Once every 10,000 years or so, the center of a galaxy lights up as its supermassive black hole rips apart a passing star. This “tidal disruption event” happens in a literal flash, as the central black hole pulls in stellar material and blasts out huge amounts of radiation in the process.  Astronomers know of around 100 tidal disruption events (TDE) in distant galaxies, based on the burst of light that arrives at telescopes on Earth and in space. Most of this light comes from X-rays and optical radiation.  MIT astronomers, tuning past the conventional X-ray and UV/optical bands, have discovered a new ...

In people with Alzheimer’s, the earliest symptoms are commonly disruptions in sleep rhythms. These include daytime sleepiness, showing agitation or confusion around dusk, staying awake longer, and waking up often at night. These changes are thought to result from damage to sleep-regulating areas in the brain. Alzheimer patients tend to spend less time in both REM (rapid eye movement) sleep, in which most dreaming occurs, and non-REM (NREM) sleep. But they show the greatest reduction in so-called slow-wave sleep (SWS) – a stage of non-dreaming deep sleep, characterized by slow ‘delta’ brain waves (0.1 to ...

Arynes, synthetic intermediates in which a portion of the benzene ring is a triple bond, have been applied in various organic molecular transformations and have long been of interest to chemists as extremely useful compounds. Furthermore, with the advancement in aryne chemistry, the development of “asymmetric synthesis” reactions of arynes, which are expected to increase the efficiency of the synthesis of compounds with complex steric structures and facilitate the creation of new compounds, has attracted increasing attention. However, asymmetric synthesis based on arynes, which are extremely reactive and unstable, presents several challenges. Therefore, asymmetric ...

Newborns of Black and Asian mothers are significantly more likely to experience hypothermia than those born to white mothers, according to a new study. The research will be presented at the Pediatric Academic Societies (PAS) 2023 Meeting, held April 27-May 1 in Washington, D.C. Researchers reviewed electronic medical records of 23,549 infants born at 35 weeks or later and admitted to a children’s hospital-affiliated newborn nursery between 2015 and 2021. The study evaluated all recorded temperatures ...