Physicists at Fermilab's KTeV experiment report a large and unexpected direct CP violation, ruling out the Superweak Theory. The finding exceeds previous expectations, raising questions about its accommodation within the Standard Model.
A genome scan identified regions on chromosomes 2, 4, 10, 16, 17 and 18 that may contain genes influencing nicotine dependence. The study used two independent samples, with limited replication in several regions suggesting further investigation is warranted.
A new automobile exhaust system reduces pollution and boosts engine power at the same time. The design increases overall engine performance by 5 percent while also cutting emissions by 15 percent, making it a significant improvement over standard auto exhaust assemblies.
A computer model developed by Jay Rubinstein suggests that increasing the signal pulses from external processors can produce more independent neuron activity, similar to natural acoustic stimulation. This breakthrough could lead to substantial improvements in all types of sound coding for people with cochlear implants.
Researchers found a link between fruit fly gene variations and mood disorders in males, but not females. The study suggests the human homologue of the white gene may play a role in controlling mood and anxiety.
African American and Mexican American adults have lower serum and red cell folates compared to white adults. This disparity underscores the importance of improving dietary habits and folate supplements among these populations. Lower folate levels are a risk factor for neural tube defects in offspring and potentially other diseases.
Scientists experiment with materials in space to study structure, properties and processing methods. These experiments have led to new understanding of semi-conductors, metallic-electronic crystals and improved X-ray and infrared sensors.
U.C. San Diego researchers successfully trapped non-neutral plasma using a combination of electric and magnetic fields, forming novel vortex crystals when cooled. This breakthrough may hold the key to creating anti-hydrogen, quantum computing, and advanced atomic clocks.
A recent study by Ohio State University researchers found that obese Black teenagers have a significantly higher risk of developing type II diabetes as adults compared to their white counterparts. The study highlights the need for early aggressive weight management in Black teens, given racial and ethnic differences in glucose metabolism.
A study of 203 children with medulloblastoma found that a tried-and-true chemotherapy protocol provides better results than a newer method, while the quality of neurosurgery also affects long-term survival rates. The ability to remove nearly all of the tumor is critical for improved outcomes.
A new superconducting device detects single light quanta at wavelengths longer than previously possible, detecting 25 billion photons per second. The device is capable of detecting changes in light level and has small size, making it a candidate for a superconducting computer input component.
The new gradiometer has the potential to revolutionize submarine navigation and underground structure detection, offering improved accuracy and reduced costs. Its commercial applications include geophysical mineral exploration and archaeological studies, enhancing our understanding of hidden pathways and structures.
Researchers at UNC Chapel Hill discovered molecular changes in nerve cells that may play a role in causalgia, a painful medical syndrome. The study found that nerve fibers affected by injury become supersensitive to norepinephrine, leading to persistent burning pain.
Researchers found that changes in the brain characteristic of Alzheimer's disease begin years before clinical symptoms like memory loss. The study used brain tissue from over 60 subjects, including healthy individuals and those with dementia, to identify amyloid plaques and neurofibrillary tangles.
The Office of Naval Research has developed proprietary technology to improve hearing protection devices for service personnel exposed to high-level noise. The composite material absorbs acoustical energy more effectively, resulting in better-fitting and more effective ear-protection devices.
Scientists from around the world collaborated to develop improved atmospheric aerosol models for predicting infrared propagation in coastal environments. The project aims to enhance sensor accuracy for detecting incoming threats such as missiles and submarine periscopes.
A 12-year study of nearly 600 children found that interventions targeting teachers, parents, and children in elementary school significantly reduced violent behavior, heavy drinking, and sexual activity, while improving school performance. The program had long-lasting effects through age 18.
Research suggests that infrared thermometers can accurately measure newborn temperatures, especially after feeding and before transferring to cribs. However, using these devices on older infants may not yield accurate results.
New research suggests that increased Arctic temperatures due to global warming can lead to higher levels of carbon dioxide emissions, fueling global warming further. The study found that artificially elevating summer temperatures in arctic tundra resulted in significant losses of carbon dioxide from the soil.
A study found 10-year syphilis rates in counties bordering I-95 were 2.38 times higher than those not bordering the highway. Drug trafficking significantly contributed to the contagion.
A study of 129 children and their parents found that adolescent girls are more helpful and affectionate towards their parents. The quality of the parent-child relationship plays a significant role in determining the level of affection and helpfulness displayed by adolescents.
The Office of Naval Research has developed a system that uses complex mathematical steps to filter out unwanted material in surveillance images and locate land mines. This new technology can find above-ground mines in an aerial picture in less than a minute, producing results superior to existing systems.
A large study found that cardiorespiratory fitness was associated with a lower risk of death from all causes, regardless of body fatness. The researchers suggest that fitness may be more important than being lean for reducing obesity and mortality risk.
African Americans are less likely to visit the dentist for routine visits due to lack of money and dental insurance. The study found that 13% of African Americans had never visited a dentist, compared to 1% of whites.
A study suggests that an imbalance in genes expressed on the X chromosome may lead to ovarian cancer development. The research found nonrandom X-chromosome inactivation in over 50% of women with invasive ovarian cancer, particularly those with BRCA1 mutations.
This study of 260 retired Baltimore schoolteachers found correlations between coffee consumption, inadequate dietary protein, and increased serum homocysteine levels. The findings suggest that reducing these lifestyle factors may help mitigate the risk of cardiovascular disease.