Articles tagged with Calibration
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The LUX detector demonstrates its high sensitivity to potential signals in the search for low-mass dark matter particles. The new calibration confirms that no evidence of such particles was found during the detector's initial run.
The National Institute of Standards and Technology (NIST) has developed prototype calibration tools for ultra-low field magnetic resonance imaging (ULF-MRI), a technique that provides new contrast mechanisms and practical advantages. The ULF-MRI phantoms are designed to allow direct comparison of performance between ULF-MRI and clinica...
A new internationally agreed radiocarbon calibration curve will allow key past events to be dated more accurately. The research, led by the University of Sheffield and Queen's University Belfast, provides improved accuracy to archaeologists, environmental scientists, and climate researchers.
The Total solar irradiance Calibration Transfer Experiment (TCTE) was launched by NASA using a combination of enthusiasm, spare parts, and resources. The instrument was assembled in just five months to fill a gap in the data record after an aging satellite's battery life expired.
A NASA sounding rocket launch will support calibration of the EUV Variability Experiment (EVE) aboard the Solar Dynamics Observatory (SDO) satellite. The EVE instrument measures total extreme ultraviolet irradiance, and this under-flight calibration is crucial for validating long-term variations in solar radiation.
A Wayne State University researcher has developed a new technique called LOBOT that provides accurate, real-time positions for small ground robotic vehicles. The technique combines elements of common localization schemes and uses a hybrid approach with infrequent GPS use, a 3-D accelerometer, and motor rotation sensors.
A new radiocarbon dating method enables precise calibration of past ages, improving climate change understanding. The method uses seasonal layered deposits in lake sediments to date older objects up to 52.8 kyr BP.
The Chugach Metamorphic Complex in southern Alaska reveals short-lived metamorphism, while a study of Shiveluch Volcano provides insights into lava dome growth. Meanwhile, a team from Tulane University proposes a new calibration model for the Geomagnetic Polarity Time Scale, and researchers in Tibet explore pulsed Miocene range growth.
Scientists warn that current climate model predictions are unreliable due to measurement uncertainties. A new satellite concept, TRUTHS, aims to improve accuracy by calibrating other satellites and facilitating the establishment of a global network with robust quality guarantees.
Researchers report a lower value of total solar irradiance than previously measured, demonstrating improved accuracy and consistency. The new findings will help resolve the question of how significant a contributor solar fluctuations are to global warming.
The federal peer review system is under scrutiny for being overwhelmed by an increasing number of funding proposals, leaving room for errors. Experts recommend a calibration system to mitigate these errors, which can occur due to biased reviewers or overconfident assessments.
Researchers found that people who are confident in their judgments of how others perceive them tend to be accurate, while those who doubt themselves are less so. This 'calibration' enables individuals to make informed decisions and pursue the next step after a first impression.
Researchers at Queen's University have developed a new calibration curve that extends radiocarbon dating back 50,000 years, providing valuable insights into human evolution and climate change. The INTCAL09 curve improves earlier parts of the calibration curve and will be used worldwide by archaeologists and earth scientists.
The National Institute of Standards and Technology (NIST) has introduced a novel calibration technique for entire waveforms, enabling more accurate measurements in oscilloscopes. This new method improves the characterization of diverse waveforms, particularly in high-speed devices, and offers potential cost savings in industries such a...
Researchers at NIST have proposed a mathematical solution to enable calibration of temperature in microfluidic systems for accurate measurements. The new equations can correct errors introduced by changing reference temperatures, benefiting applications like DNA amplification and chemical analysis.
A new calibration tool has been developed to help students and soil scientists accurately measure rupture resistance, a key factor in determining soil strength. The tool consists of four pressure calibration assemblies with varying pressures, allowing users to calibrate their thumb and forefinger for precise measurement.
A new study found that people who make healthier food choices have high emotional intelligence and confidence in their abilities. This 'emotional calibration' helps them resist impulsive eating triggered by vivid food pictures, such as those of hot fudge sundaes.
Researchers mapped Bolivia's Salar de Uyuni to a resolution of a few centimeters, uncovering previously hidden features like hills, ridges, and valleys. These topographic features impact satellite-based ranging instruments' accuracy, revealing a correlation between subsurface density variations and surface gravity strength
A new acoustic absorber developed by National Physical Laboratory has improved the calibration accuracy of physiotherapy ultrasound machines, reducing the risk of patient injury. The upgrade enables equipment to accommodate spreading beams and provides greater calibration accuracy.
The National Institute of Standards and Technology has developed a new set of Standard Reference Materials to improve workplace safety by accurately measuring respirable quartz dust. These materials cover the range between 5 micrograms and 1000 micrograms of quartz per filter, typical of the field's range.
Research by Arul Mishra and Dhananjay Nayakankuppam found that human judges are inconsistent in their assessments, rather than relying on data or calibration. This inconsistency arises from the use of causal stories to explain relationships between cues and qualities.
NIST creates a new test protocol and performance measure for evaluating 3D imaging systems, including indoor, artifact-based facilities and outdoor ranging capabilities. The standards will provide objective comparisons of different devices, reduce confusion, and increase user confidence.
Researchers analyzed genes and developed new statistical technique to estimate divergence time. They found that humans and chimpanzees likely shared a common ancestor between 5-7 million years ago, with a maximum limit of approximately 7 million years ago.
The National Institute of Standards and Technology (NIST) is establishing a program to accredit voting system test labs, which will be part of the National Voluntary Laboratory Accreditation Program (NVLAP). NVLAP accreditation is a prerequisite for laboratories to be considered as Voting System Test and Certification Authorities (VSTC...
Satellite images help model sediment transport in New Caledonia's southwest lagoon, providing a three-dimensional picture of the process. The combined use of remote sensing and numerical models refines predictions of erosion rates and improves precision.
The Pacific Northwest National Laboratory is conducting a marathon testing regime to ensure personal radiation detection equipment meets new standards for identifying potential threats. The tests will evaluate the electrical systems, mechanical operations, environmental susceptibilities, and radiological sensitivities of over 100 instr...
A study by RTI International and the Mayo Clinic found that calibration errors in calcium laboratory tests can add up to $89 per patient, affecting approximately 3.55 million patients and increasing healthcare costs.
The NIST virtual surface calibration Web site provides free two-dimensional surface texture analysis software and a database of 10 different types of surface profiles. Manufacturers can validate software measurements and upload their own surface profiles to gain confidence in the accuracy of their software.
Physicists at NIST used a highly sophisticated spectrometer to measure light wavelengths, providing 10 times better resolution than similar instruments. This improvement is expected to help the semiconductor industry create smaller circuits.
A groundbreaking study by University of Melbourne researcher Dr. John Sader challenges the widespread use of V-shaped cantilevers in atomic force microscopy. His research reveals that these microcantlevers actually degrade instrument performance and cause difficulties in calibration, contrary to accepted practice.
The Hopkins University replaced a failed 24-inch telescope with a smaller one used for stargazing, ensuring the success of the Sloan Digital Sky Survey. The telescope was retrofitted with new optics and is now ready to contribute to the mapping of millions of galaxies.
A NASA image reveals the significant impact of urbanization on Sacramento's city temperature, with buildings reaching up to 140 degrees F. The study emphasizes the importance of urban forests in regulating city temperatures and suggests that their extent and arrangement play a crucial role in mitigating heat island effects.