Results 11 to 20 of about 2,498,425 (263)

Preliminary Selection and Characterization of Pseudo-Invariant Calibration Sites in Northwest China

open access: yesRemote Sensing, 2020
Pseudo-invariant calibration sites (PICS) have been used for the radiometric calibration and stability monitoring of satellite optical sensors. Several stable PICS, such as those in the Sahara Desert in North Africa, were selected for the vicarious ...
Xiuqing Hu   +9 more
doaj   +1 more source

A curated gene and biological system annotation of adverse outcome pathways related to human health

open access: yesScientific Data, 2023
Adverse outcome pathways (AOPs) are emerging as a central framework in modern toxicology and other fields in biomedicine. They serve as an extension of pathway-based concepts by depicting biological mechanisms as causally linked sequences of key events ...
Laura Aliisa Saarimäki   +6 more
doaj   +1 more source

Are cluster validity measures (in) valid?

open access: yesInformation Sciences, 2021
Internal cluster validity measures (such as the Calinski-Harabasz, Dunn, or Davies-Bouldin indices) are frequently used for selecting the appropriate number of partitions a dataset should be split into. In this paper we consider what happens if we treat such indices as objective functions in unsupervised learning activities.
Marek Gagolewski   +2 more
openaire   +2 more sources

The Functional Role of IgA in the IgM/IgA-Enriched Immunoglobulin Preparation Trimodulin

open access: yesBiomedicines, 2021
In comparison to human immunoglobulin (Ig) G, antibodies of IgA class are not well investigated. In line with this, the functional role of the IgA component in IgM/IgA-enriched immunoglobulin preparations is also largely unknown.
Fabian Bohländer   +5 more
doaj   +1 more source

Changing Swabs: To Validate or Not To Validate? [PDF]

open access: yesJournal of Clinical Microbiology, 2013
A widely perceived requirement for validation of all new specimen collection swabs by the laboratory appears to be the result of misinformation. Neither the College of American Pathologists (CAP) nor regulations through the Clinical Laboratory Improvement Amendments (CLIA) address specifically ...
J Michael, Miller   +2 more
openaire   +2 more sources

On Validity

open access: yesStudies in Applied Linguistics and TESOL, 2023
The way in which validity has been conceptualized has changed throughout the years. The focus in validation studies shifted from evaluating distinct components of validity to developing a comprehensive argument for the use and interpretations of test scores.
openaire   +2 more sources

Aryl Hydrocarbon Receptor Activation by Benzo[a]pyrene Prevents Development of Septic Shock and Fatal Outcome in a Mouse Model of Systemic Salmonella enterica Infection

open access: yesCells, 2022
This study focused on immunomodulatory effects of aryl hydrocarbon receptor (AhR) activation through benzo[a]pyrene (BaP) during systemic bacterial infection.
Christiane Fueldner   +11 more
doaj   +1 more source

Rounding up plant cells

open access: yesInternational Journal of Plant Biology, 2010
Compared to animal cells, plant cells are typically non-spherical, which may bias morphometric and fluorimetric analyses, including flow cytometry and other approaches used in the study of cellular biodiversity.
Sergio Ochatt, Anne Moessner
doaj   +1 more source

FY-3G Satellite Instruments and Precipitation Products: First Report of China’s Fengyun Rainfall Mission In-Orbit

open access: yesJournal of Remote Sensing, 2023
Precipitation is one of the most important parameters in Earth system but is hard to measure. China began to develop satellites dedicated to precipitation measurements in the second generation of the FengYun polar-orbiting meteorological satellite ...
Peng Zhang   +16 more
doaj   +1 more source

FY-3D MERSI On-Orbit Radiometric Calibration from the Lunar View

open access: yesSensors, 2020
Limited by the on-orbital calibration capability, scaling the measured radiance in accuracy and stability is challenging for the Earth observation satellites in the reflective solar bands (RSBs).
Ronghua Wu   +6 more
doaj   +1 more source

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