Articles tagged with Random Sampling
Comprehensive exploration of living organisms, biological systems, and life processes across all scales from molecules to ecosystems. Encompasses cutting-edge research in biology, genetics, molecular biology, ecology, biochemistry, microbiology, botany, zoology, evolutionary biology, genomics, and biotechnology. Investigates cellular mechanisms, organism development, genetic inheritance, biodiversity conservation, metabolic processes, protein synthesis, DNA sequencing, CRISPR gene editing, stem cell research, and the fundamental principles governing all forms of life on Earth.
Comprehensive medical research, clinical studies, and healthcare sciences focused on disease prevention, diagnosis, and treatment. Encompasses clinical medicine, public health, pharmacology, epidemiology, medical specialties, disease mechanisms, therapeutic interventions, healthcare innovation, precision medicine, telemedicine, medical devices, drug development, clinical trials, patient care, mental health, nutrition science, health policy, and the application of medical science to improve human health, wellbeing, and quality of life across diverse populations.
Comprehensive investigation of human society, behavior, relationships, and social structures through systematic research and analysis. Encompasses psychology, sociology, anthropology, economics, political science, linguistics, education, demography, communications, and social research methodologies. Examines human cognition, social interactions, cultural phenomena, economic systems, political institutions, language and communication, educational processes, population dynamics, and the complex social, cultural, economic, and political forces shaping human societies, communities, and civilizations throughout history and across the contemporary world.
Fundamental study of the non-living natural world, matter, energy, and physical phenomena governing the universe. Encompasses physics, chemistry, earth sciences, atmospheric sciences, oceanography, materials science, and the investigation of physical laws, chemical reactions, geological processes, climate systems, and planetary dynamics. Explores everything from subatomic particles and quantum mechanics to planetary systems and cosmic phenomena, including energy transformations, molecular interactions, elemental properties, weather patterns, tectonic activity, and the fundamental forces and principles underlying the physical nature of reality.
Practical application of scientific knowledge and engineering principles to solve real-world problems and develop innovative technologies. Encompasses all engineering disciplines, technology development, computer science, artificial intelligence, environmental sciences, agriculture, materials applications, energy systems, and industrial innovation. Bridges theoretical research with tangible solutions for infrastructure, manufacturing, computing, communications, transportation, construction, sustainable development, and emerging technologies that advance human capabilities, improve quality of life, and address societal challenges through scientific innovation and technological progress.
Study of the practice, culture, infrastructure, and social dimensions of science itself. Addresses how science is conducted, organized, communicated, and integrated into society. Encompasses research funding mechanisms, scientific publishing systems, peer review processes, academic ethics, science policy, research institutions, scientific collaboration networks, science education, career development, research programs, scientific methods, science communication, and the sociology of scientific discovery. Examines the human, institutional, and cultural aspects of scientific enterprise, knowledge production, and the translation of research into societal benefit.
Comprehensive study of the universe beyond Earth, encompassing celestial objects, cosmic phenomena, and space exploration. Includes astronomy, astrophysics, planetary science, cosmology, space physics, astrobiology, and space technology. Investigates stars, galaxies, planets, moons, asteroids, comets, black holes, nebulae, exoplanets, dark matter, dark energy, cosmic microwave background, stellar evolution, planetary formation, space weather, solar system dynamics, the search for extraterrestrial life, and humanity's efforts to explore, understand, and unlock the mysteries of the cosmos through observation, theory, and space missions.
Comprehensive examination of tools, techniques, methodologies, and approaches used across scientific disciplines to conduct research, collect data, and analyze results. Encompasses experimental procedures, analytical methods, measurement techniques, instrumentation, imaging technologies, spectroscopic methods, laboratory protocols, observational studies, statistical analysis, computational methods, data visualization, quality control, and methodological innovations. Addresses the practical techniques and theoretical frameworks enabling scientists to investigate phenomena, test hypotheses, gather evidence, ensure reproducibility, and generate reliable knowledge through systematic, rigorous investigation across all areas of scientific inquiry.
Study of abstract structures, patterns, quantities, relationships, and logical reasoning through pure and applied mathematical disciplines. Encompasses algebra, calculus, geometry, topology, number theory, analysis, discrete mathematics, mathematical logic, set theory, probability, statistics, and computational mathematics. Investigates mathematical structures, theorems, proofs, algorithms, functions, equations, and the rigorous logical frameworks underlying quantitative reasoning. Provides the foundational language and tools for all scientific fields, enabling precise description of natural phenomena, modeling of complex systems, and the development of technologies across physics, engineering, computer science, economics, and all quantitative sciences.
A study found that energy companies use repeated phone calls, home visits, and 'legalized compulsion' to force homeowners to give up their land for hydraulic fracturing. The researchers reviewed data from Ohio and found that many negotiations end in compulsion rather than consent.
A new method can help estimate the prevalence of disease in free-ranging wildlife by accounting for animal clustering. This approach may reduce the number of samples needed to detect a disease. The researchers focused on Chronic Wasting Disease (CWD) in deer, which tends to cluster in family groups, making this method particularly useful.
A new paper proposes an itemized checklist to guide researchers in publishing analyses using complex sample survey data. The checklist, PRICSSA, consists of 17 important items to report for any analyses conducted on complex survey data. This reform aims to increase transparency and make analytic mistakes easier to spot.
A systematic review and meta-analysis found that MRI-based surveillance after surgical treatment can detect clinically occult local recurrences, potentially improving patient outcomes. The study included 19 studies and showed a significant association between high-intensity surveillance and the detection of local recurrences.
Researchers developed a method to estimate seroprevalence using blood donation samples, offering insights into the first year of the COVID-19 epidemic in Brazil. The study found significant differences among regions and subgroups, highlighting the need for real-time tracking and forecasting of future waves.
Researchers found that consumers are 25% less likely to purchase low-availability items when told supply is low, resulting in a 5.3% increase in revenue per customer. Online retailers can benefit from this strategy by managing customers' expectations and improving decision-making.
A survey of primary care physicians revealed that those with beliefs about BZD potential harm were less likely to prescribe it. Clinicians with low concern about continuing BZDs for long-term treatment were more likely to prescribe the medication.
A study analyzing health records of veterans with SARS-CoV-2 infection and long COVID symptoms reveals the challenges of diagnosing and managing this condition. The analysis highlights complexities in clinical diagnosis and patient care.
A study reveals that BA.2.75.2, a new Omicron sublineage, largely evades neutralizing antibodies and is resistant to several monoclonal antibody treatments, posing an increased risk of SARS-CoV-2 infections this winter.
A recent study by the University of Helsinki found that scent detection dogs can accurately identify individuals with a coronavirus infection from skin swabs. The dogs' sensitivity and specificity were 92%, with only small differences in accuracy observed between individual dogs.
A new technique called Operational Genomic Units (OGU) allows for improved resolution and simplicity in analyzing microbiome samples. By using individual genomes as basic units, researchers can pinpoint biologically relevant characteristics such as age and sex with greater accuracy.
A novel ferroelectric tunnel junction (FTJ) synapse based on Ag/PbZr0.52Ti0.48O3(PZT, (111)-oriented)/Nb:SrTiO3 demonstrated 256 conductance states with satisfactory linearity and stability. The ON/OFF ratio was as high as 200, and an endurance of up to 10^9 cycles was achieved.
A retrospective study found that Lung-RADS performed well in assessing lung cancer risk on follow-up CT scans, with a weighted cancer risk of 5% for new nodules. Strict application of Lung-RADS criteria downgraded some malignant nodules, highlighting the need for category 4X for suspicious features.
New research by the U.S. Army reduces unpredictability of current training reinforcement learning policies, enabling robots to reason and adapt to changing battlefield conditions. The breakthrough enhances the Army's future operating concept by incorporating risk sensitivity, safety constraints, exploration, and divergence to a prior.
Researchers developed a novel method for producing higher-quality images and scene designs in less time by using a deep-learning-based approach that considerably cuts the noise in images. The method results in sharper images with intricate details, including complex lighting components.
Researchers found that millennials' recognition of 1960s-1990s songs remains relatively stable, while recognition of songs from 2000 to 2015 diminishes rapidly. The study suggests that the large diversity of popular songs in the latter part of the 20th century may contribute to this phenomenon.
Researchers found low genetic diversity among ancient macaw skeletons from Chaco Canyon and the Mimbres region in New Mexico, dating back to 900-1200 CE. This suggests a translocated breeding population of macaws based on a small founder population.
Researchers from Rice University and Duke University developed a new method to accurately estimate the number of identified victims killed in the Syrian civil war. Using 'hashing with statistical estimation,' they produced real-time estimates with a lower margin of error than existing methods.
A recent study found that older adults with four or more chronic conditions are less likely to participate actively in medical decisions. In contrast, those without multiple conditions tend to prefer more active involvement.
A telephone-first approach to general practice reduced face-to-face consultations and increased telephone calls, but also led to an increase in emergency admissions. Despite its potential for managing some workloads, the approach was found to be associated with increased GP workload.
A new mathematical theorem developed by Carnegie Mellon University and University of Pittsburgh mathematicians proves that Pennsylvania's congressional district maps are likely the result of gerrymandering. The researchers used a Markov chain to analyze the characteristics of the current map, comparing it to randomly generated typical ...
UCLA researchers Patricia Keating and Jody Kreiman analyzed recordings from 50 women to identify acoustic parameters distinguishing their voices. The study aims to understand which characteristics make a speaker's voice recognizable and how much change is perceptible to listeners.
Researchers from MIT's Computer Science and Artificial Intelligence Laboratory propose a theoretical framework for estimating population density in networks, which converges quickly and is more accurate than random sampling. This approach has practical applications in analyzing social networks, robot swarms, and ad hoc networks.
Severe obstructive sleep apnea and excessive daytime sleepiness are associated with an increased risk of depression in men. A large community-based study found that previously undiagnosed severe OSA and EDS were significantly linked to depression prevalence and incidence in a population of Australian men.
A new study from NIMBioS suggests that considering a species' selfing rate, seed dispersal distances, and reproductive type can improve seed collection effectiveness. This approach can help conserve genetic diversity and rare species, such as the Trillium tennesseense.
Researchers at MIT develop an algorithm that allows household robots to recognize four times as many objects as traditional methods, reducing misidentifications. The new approach uses a representative sampling technique, sampling hypotheses across successive images, and evaluating them more efficiently.
A urine HPV test showed high accuracy in detecting the virus compared to traditional cervical sampling methods. The test had a sensitivity of 87% and specificity of 94%, with improved results when using first-void urine samples.
A study found that non-smoking hotel rooms can be polluted with third-hand smoke, even if the hotel has a partial smoking ban. Non-smokers who stayed at these hotels had higher levels of nicotine and other pollutants in their urine and finger wipes compared to those staying in total smoking banned hotels.
A new study by McGill University and Stony Brook University researchers found that true fame is not fleeting. The study analyzed names mentioned in English-language newspapers over several decades and found that most famous individuals remain celebrated for decades, regardless of their field.
A new study suggests that reading news articles linking alcohol to crimes or accidents increases support for enforcing alcohol laws. Participants who read articles mentioning alcohol's role showed higher support for laws regulating serving intoxicated people and sales to underage youth.
A cross-sectional study of 1500 adults in Stockholm found that only 3% lodged official complaints, despite 18.5% feeling they had grounds for complaint. Poor experiences and lack of trust in healthcare were common deterrents.
A study by the University of the Basque Country found that insecure individuals, particularly those with anxious-ambivalent tendencies, struggle with conflict in their sexual desire and relationships. Controlling partners tend to exhibit greater conflict, while avoidant types evince more problems in intimacy.
Researchers argue that racial profiling is fundamentally flawed and no more effective than standard uniform random sampling techniques. It can lead to false assumptions, unfair detention of innocent individuals, and even radicalization.
The survey found that women made up 56% of Obama's small donors, while McCain's were 61% male. Younger donors, aged 18-29, also favored Obama, with 15% of his small donors in this age group compared to 5% for McCain. Additionally, Obama's donors were more likely to be better educated and less affluent than McCain's. The campaign's onli...
Researchers discovered Strongyloides stercoralis, a soil-transmitted worm, endemic in southern Yunnan province, China, with 11.7% of the population infected. The parasite mainly affects healthy individuals, but can be fatal for those with weakened immune systems.
A large national study found that 18 percent of adults without a history of stroke report having had at least one symptom. Brief physical examinations revealed undiagnosed or silent strokes in many individuals. African Americans and those with lower incomes were more likely to have had these symptoms.
Research by Timothy Judge found that stressed employees bring negative moods home with them, but these effects are short-lived. Employers can contribute to positive moods in both work and family life by treating employees well, the study suggests.
A recent study by Dr. Shrawan Kumar found that X-ray technologists experience high levels of back pain and neck strain due to excessive task demands. The constant physical stress compounds the issue, with few professionals beyond 50 years old remaining in the field.
A recent survey by the March of Dimes found that only 32% of women between 18-45 take a daily multivitamin containing folic acid, despite being aware of its benefits. This is concerning given the importance of folic acid in preventing serious birth defects of the brain and spine.
A recent University of North Carolina at Chapel Hill poll found that 65% of respondents favor the death penalty, while 19% oppose it. The racial and demographic differences are significant, with whites more supportive than blacks, and men more supportive than women.