Results 11 to 20 of about 1,613,220 (286)

rox: A Statistical Model for Regression with Missing Values

open access: yesMetabolites, 2023
High-dimensional omics datasets frequently contain missing data points, which typically occur due to concentrations below the limit of detection (LOD) of the profiling platform.
Mustafa Buyukozkan   +2 more
doaj   +1 more source

Estimation of limit of detection of Salmonella typhimurium in artificially contaminated chicken meat by cultured-based and polymerase chain reaction techniques [PDF]

open access: yesIraqi Journal of Veterinary Sciences, 2021
The objective of this study was to develop Polymerase Chain Reaction (PCR) procedure for detection of Salmonella Typhimurium in artificially contaminated chicken meat.
Yousif M. Sharif, Bizhar A. Tayeb
doaj   +1 more source

Material Limitations on the Detection Limit in Refractometry [PDF]

open access: yes, 2009
We discuss the detection limit for refractometric sensors relying on high-Q optical cavities and show that the ultimate classical detection limit is given by min{Dn} > eta with n+i*eta being the complex refractive index of the material under ...
Armani   +30 more
core   +6 more sources

Assessing Limit of Detection in Clinical Sequencing [PDF]

open access: yesThe Journal of Molecular Diagnostics, 2021
Clinical reporting of solid tumor sequencing requires reliable assessment of the accuracy and reproducibility of each assay. Somatic mutation variant allele fractions may be below 10% in many samples due to sample heterogeneity, tumor clonality, and/or sample degradation in fixatives such as formalin.
Elizabeth R. Starks   +6 more
openaire   +2 more sources

Statistical limits of sparse mixture detection

open access: yesElectronic Journal of Statistics, 2022
We consider the problem of detecting a general sparse mixture and obtain an explicit characterization of the phase transition under some conditions, generalizing the univariate results of Cai and Wu. Additionally, we provide a sufficient condition for the adaptive optimality of a Higher Criticism type testing statistic formulated by Gao and Ma.
openaire   +3 more sources

Limits of Detecting Extraterrestrial Civilizations

open access: yes, 2021
The search for extraterrestrial intelligence (SETI) is a scientific endeavor which struggles with unique issues -- a strong indeterminacy in what data to look for and when to do so. This has led to attempts at finding both fundamental limits of the communication between extraterrestrial intelligence and human civilizations, as well as benchmarks so as ...
George, Ian   +2 more
openaire   +2 more sources

Quantum-optical communication rates through an amplifying random medium [PDF]

open access: yes, 2002
We study the competing effects of stimulated and spontaneous emission on the information capacity of an amplifying disordered waveguide. At the laser threshold the capacity reaches a "universal" limit, independent of the degree of disorder.
A. L. Moustakas   +23 more
core   +4 more sources

A comparison of DNA/RNA extraction protocols for high-throughput sequencing of microbial communities

open access: yesBioTechniques, 2021
One goal of microbial ecology researchers is to capture the maximum amount of information from all organisms in a sample. The recent COVID-19 pandemic, caused by the RNA virus SARS-CoV-2, has highlighted a gap in traditional DNA-based protocols ...
Justin P Shaffer   +17 more
doaj   +1 more source

Speciation without chromatography: Part 2. Determination of tributyltin by chloride generation flow injection atomic absorption spectrometry [PDF]

open access: yes, 2002
A procedure is described for the quantitation of tributyltin in aqueous samples and extracts based on its relatively high volatility in halide media, permitting vapour phase sampling from the headspace above such samples.Tributyltin chloride (TBT-C1) was
Christine Scriver   +13 more
core   +1 more source

Charge Detection in a Closed-Loop Aharonov-Bohm Interferometer [PDF]

open access: yes, 2006
We report on a study of complementarity in a two-terminal "closed-loop" Aharonov-Bohm interferometer. In this interferometer, the simple picture of two-path interference cannot be applied.
A. L. Yeyati   +3 more
core   +2 more sources

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