Researchers using Arecibo Telescope discovered never-before-seen radio emission spectra from the Crab Nebula pulsar. The findings suggest an unknown magnetic pole, contradicting existing theories and challenging our understanding of pulsars.
A study found that BRCA1 and BRCA2 mutations are more common in the general population than previously reported, increasing the risk of ovarian, breast, testicular, and pancreatic cancers. The study also showed that these mutations are associated with higher risks of specific types of cancer.
Researchers have developed a novel simulator that can recreate quantum behavior in atoms and particles, enabling control over individual parts of a quantum system. This breakthrough is crucial for developing powerful quantum computers that can perform calculations billions of times faster than normal computers.
The Mount Sinai Medical Center will receive a $400,000 grant to develop and disseminate a curriculum educating health professionals about rational prescribing. The grant aims to promote critical thinking and healthy skepticism among healthcare providers, enabling them to make evidence-based prescribing decisions.
Richard Horton states that Julio Frenk has technical competence and administrative skills for the role. He is considered a front-runner due to his vision for WHO's revitalisation as a global public-health agency.
A survey of over 3,000 physicians found that fewer than half incorporate e-mail and Internet resources into routine patient practice. Only about 40% said they used e-mail communication with colleagues frequently.
The Lancet has published profiles of the 13 WHO Director-General election candidates, highlighting their relevant experience and achievements. The journal will continue to follow the campaign and publish detailed statements from the candidates on its website.
Astronomers have used a pair of pulsars to show that general relativity is correct within 0.05% accuracy, the most stringent limit to date. The double-pulsar system provides independent tests of general relativity and its predictions, including gravitational waves and time dilation.
The International Astronomical Union has elected Catherine Cesarsky as its new president, effective for the next three years. The IAU will play a key role in promoting astronomy globally, especially during the proposed International Year of Astronomy in 2009.
Dr. Catherine Cesarsky has been elected as the new President of the International Astronomical Union (IAU) for a three-year term, becoming the first woman to receive this distinction. She brings extensive experience in research and leadership, having previously served as ESO Director General.
The IAU defined a planet as a celestial body in orbit around the Sun with sufficient mass to assume hydrostatic equilibrium. The new definition includes our solar system's eight recognized planets and a distinct class of dwarf planets, including Pluto.
Astronomers are using supercomputers to study the energy levels of high-temperature atoms in space, which hold the key to understanding black holes. The new calculations reduce error rates by a few percent, providing more accurate data for X-ray telescope observations.
Astronomers discovered a brown dwarf in close orbit around a white dwarf, with a separation of less than 2/3 of the Sun's radius. The system formed after the red giant engulfed its companion and ejected its envelope, leaving behind a binary system.
Researchers found great apes outperforming monkeys and lemurs in problem-solving tests across multiple paradigms. This suggests a broad, domain-general type of intelligence that allows them to succeed in various situations, contradicting the theory of specialized skills.
Researchers at Ames Laboratory have successfully created metamaterials that can refract light at negative angles, potentially enabling the development of superlenses for medical imaging. This achievement demonstrates a new way to manipulate light's path and speed, moving closer to Einstein's theory of relativity.
Researchers predict that braneworld black holes, created in the early universe, have survived and can be detected by observing gamma-ray bursts passing near them. The signature of these black holes could provide evidence for a fourth dimension of space.
A team of researchers at Penn State has discovered a mathematical description of a contracting universe that existed before the Big Bang, with space-time geometry and gravity exhibiting unique properties. The findings rely on loop quantum gravity theory, which proposes a discrete 'atomic' structure to space-time.
59% of general internists, 60% of subspecialists participated to improve professional image and update medical knowledge. The survey also found that 69% of general internists believed board-certified physicians are more competent than non-certified ones.
Scientists conducted precise tests of Einstein's famous formula, confirming the relationship between energy and mass. The experiments used instruments like GAMS4 to measure gamma rays diffracted by crystals, achieving accuracy of four-tenths of 1 part in 1 million.
The PULSE collaboration has achieved outstanding scientific results by studying pulsars to test fundamental laws and understand extreme conditions. They discovered the first known double pulsar, confirming Einstein's general theory of relativity.
Harrington's research has had a national impact on long-term care policies, informing the U.S. General Accounting Office and Senate Special Committee on Aging investigations. Her work led to budget legislation increasing minimum staffing standards and salaries for California nursing home staff in 1999.
Researchers have successfully tested Einstein's relativity theory using ultra-thin Graphene, a material created by extracting graphite via pencil-tracing. This breakthrough enables direct experiments to test relativistic ideas, potentially leading to groundbreaking discoveries.
Renal transplant recipients are at increased risk for melanoma due to immunosuppression, with a 3.6-fold increase in incidence compared to the general population. The risk increases five percent per year after transplantation and is greater in men, who also experience rapid age-related increases.
A study found suicide incidence in English and Welsh prisons from 1978–2003 was five times greater than the general male population of similar ages. Young offenders aged 15–17 years had an even higher risk, with a rate around 18 times that of the general population.
A team of researchers at UC Berkeley has successfully created a Bose-Einstein condensate in a magnetic storage ring, containing rubidium atoms at extremely low temperatures. The cold collisions of these slow-moving atoms may reveal new insights into quantum physics.
Researchers at EPFL successfully demonstrate controlling the speed of light in an optical fiber, slowing it down by a factor of 3.6 and speeding it up to exceed the speed of light without violating relativity. This breakthrough has significant implications for optical computing and telecommunications.
Research on the ATM gene suggests that women carrying one mutated copy are twice as likely to develop breast cancer, with a lifetime risk of one in six compared to one in 11 in the general population. Meanwhile, a new study on ursodeoxycholic acid treatment found a 39% reduction in colorectal adenoma recurrence among patients who recei...
Astronomers observed a binary star system called RX J0806.3+1527, where the white dwarf pair has an estimated mass of one-half the sun and orbits at a rate consistent with gravitational wave predictions. The system is believed to be among the brightest sources of gravitational waves in the galaxy.
Martin Klein received the Pais Award for his groundbreaking research on the history of 19th and 20th century physics, which have profoundly influenced generations of historians. He also made significant contributions to the history of relativity and quantum physics.
Ralph Horwitz, M.D., is receiving the Glaser Award from the Society of General Internal Medicine (SGIM) in recognition of his significant contributions to research and education in general internal medicine. The award is supported by grants from the Henry J. Kaiser Family Foundation and the Commonwealth Fund.
Researchers at RHIC have discovered a new state of matter that exhibits nearly perfect fluid motion, contradicting early theoretical predictions. The hot matter formed in collisions of gold ions moves collectively in response to pressure variations, displaying a high degree of coordination among particles.
According to Professor Andrew Hamilton, the core of a black hole is not a singular point of infinite density but rather a hot, dense plasma that siphons matter into itself. This plasma could be the cause of a space traveller's demise in larger black holes.
Scientists propose that light's origin is tied to tiny violations of Einstein's relativity, which can be tested experimentally. This new view holds promise for alternative understanding of light's behavior in various environments, including empty space and gravitational fields.
Cosmologists propose that the universe's acceleration can be explained by inflationary theory, which generates cosmic ripples that drive expansion. This solution relies on Einstein's General Relativity and doesn't require new ingredients like dark energy.
The Einstein@Home project enlists thousands of home computers to analyze data from LIGO and GEO-600 detectors, searching for subtle ripples in space-time predicted by Einstein's General Theory of Relativity. By involving hundreds of thousands of people, the project aims to discover gravitational waves and validate theoretical physics.
Researchers found that rotating black holes can cause negative refraction in electromagnetic radiation, affecting our knowledge of the universe. This discovery highlights the importance of considering gravitational forces when studying the origin of the universe.
The Einstein@Home project searches data from US and European gravitational wave detectors for signals from rapidly rotating compact quark and neutron stars. The project utilizes an army of home computer users to analyze the data, requiring enormous computational power.
The LISA mission will detect low-frequency gravitational waves from the merger of compact objects like stellar-size black holes and neutron stars. By measuring tiny changes in the motion of freely falling test masses, scientists can study these events with unprecedented precision.
Researchers identified a link between genetic mutations in the ABCA1 gene and lower HDL cholesterol levels in the general population. Approximately 10% of individuals with low HDL levels carry a mutation or nucleotide modification in one of their ABCA1 genes, suggesting that genetic variation plays a role in regulating HDL levels.
Genetic variation in ABCA1 transporter contributes to reduced HDL cholesterol levels in the general population. The study found that specific mutations affect HDL levels, with lower levels associated with a higher risk of cardiovascular disease.
A recent study found that popular magazines rarely provide in-depth information on prostate and colon cancer screening. Key points such as risk factors, early screening benefits, and potential harms are often missing from magazine articles. This lack of information may contribute to the public's misperception about cancer risks.
Professor Jim Hough of the University of Glasgow believes that gravitational waves will be detected in the near future due to advancements in instrument technology. The UK's GEO 600 device has shown promising results, and its innovations are being considered by LIGO for implementation.
The Virginia Tech/Loughborough University team designed Centuria, a plane that can replace single-engine general aviation vehicles. The team successfully created a new jet engine optimized for low flight speeds at low altitudes, meeting the needs of thousands of pilots who fly below 10,000 feet and 250 knots.
A new study published in the Journal of General Internal Medicine found that patients who saw the same doctor after hospital treatment had a significantly lower risk of dying or being readmitted. The study analyzed data from over 938,000 adults in Ontario, Canada and found that patients who received consistent follow-up care had better...
A study reveals that 97% of infertile couples and 80% of the general population believe PGD should be permitted for detecting genetic diseases. The majority also oppose reproductive cloning, with only 7% in favour. Germans demand change in German Embryo Protection Law to allow PGD.
Recent study by Yale University's Richard Easther and colleagues proposes that the Cosmic Microwave Background (CMB) may contain evidence for string theory. The CMB is thought to hold a fossilized record of the first moments of time, with subtle fluctuations potentially revealing signs of string theory.
A study found that heavy alcohol consumption is associated with a slightly increased risk of colorectal cancer. The American College of Physicians task force released eight recommendations to redefine the domain of general internal medicine, suggesting a balance between breadth and depth in practice, as well as team-based care.
Theoretical cosmologist George F.R. Ellis wins the Templeton Prize for his work on general relativity theory and its intersection with theology and social justice. His research questions the origin of the universe and explores the relationship between science, faith, and morality.
Scientists discover conditions for cracks to propagate supersonically in brittle solids, challenging classical theories on fracture speed. Hyperelasticity governs dynamic fracture under extreme deformation, with a characteristic length scale near the crack tip.
A team led by Reinhard Genzel reports detecting powerful infrared flares from a region just outside the supermassive black hole, indicating rapid rotation. The observed signals suggest that the black hole's fundamental orbital time is about half of the maximum spin allowed by general relativity.
Researchers validated Einstein's theory by applying information theory to laser experiments, showing that information cannot exceed the speed of light. The study found that fast light pulses did not travel faster than light speed, but rather were delayed slightly compared to vacuum speeds.
A new model suggests that the Big Bang could have been an explosion within a black hole, with the universe expanding into an infinite space. The theory, developed by UC Davis and University of Michigan mathematicians, satisfies Einstein's equations while allowing for expansion.
Gravitational waves are ripples in space-time produced by massive objects' acceleration. The detection of these waves will provide unique information about astrophysical systems like supernovae and black hole formation.
Peter Lynds' paper challenges assumptions about determined instantaneous physical magnitude and time, proposing a necessary trade-off between precisely determined physical values and continuity through time. He addresses long-standing issues in physics, including cosmology and the role of imaginary time.
A scientist at Berkeley Lab has re-examined the 2002 experiment claiming to measure the speed of gravity and found that it was based on a flawed assumption. The correct formula yields effects significantly smaller than initially thought, making measurement with current technology impractical.
A study of 716 consecutive emergency head CT examinations found general radiologists and neuroradiologists were in agreement on 95% of studies. The study suggests that general radiologists can accurately interpret emergency CT scans with high accuracy rates, similar to neuroradiologists.
A new study suggests that CT readings at oncology centers differ from those at general hospitals, affecting relative value unit assessments (RVUs). The average length of CT reports and character counts were significantly higher at oncology centers, with prior scans being directly compared more often.
Fotini Markopoulo Kalamara presents a fresh approach to researching theoretical possibilities for looking inside black holes and at particles of space/time. She proposes that an 'inside' quantum theory of gravity should be the collection of all partial observations of the inside observers.
The European Commission will present its research policy and funding activities at the AAAS meeting, aiming to create a European Research Area (ERA) with better coordination and cooperation. The EU's goal is to boost competitiveness and improve citizens' quality of life through significant resources mobilized via the Framework program.
Cosmologists suggest universe may collapse in 10-20 billion years due to dark energy, reversing the popular view of a runaway universe. The Stanford team's model predicts the universe will slow down and contract, leading to a cosmic 'big crunch',