Appendix B: Test Region Amplitude Taper

2009 ◽  
Keyword(s):  
Test Region ◽  
B Test

Relación entre la autoeficacia docente y la autoestima en profesores que laboran en un grupo de colegios colombianos

2018 ◽  
Vol 18 (1) ◽  
pp. 46-60
Author(s):  
Sabely Suárez Escobar
Keyword(s):  
B Test

Esta investigación procuró determinar la relación que existe entre las variables autoeficacia docente y autoestima de 86 profesores que laboran en colegios adventistas de los Llanos Orientales, Colombia. Además de responder a preguntas sociodemográficas, los docentes complementaron la (a) Escala del Sentido de Eficacia Docente, compuesta de 24 ítems, y el (b) Test de Autoestima en Profesores, que consta de 72 ítems. Se encontró́ correlación significativa entre las puntuaciones totales de las variables autoeficacia docente y autoestima de profesores. Las relaciones positivas significativas se observaron entre la variable autoestima del profesor y dos subescalas de la variable autoeficacia docente (instrucción y gestión) y entre la variable autoeficacia docente y dos subescalas de la variable autoestima de profesores (identidad y comportamiento). También se observó que algunas variables demográficas ─edad, años de experiencia docente, escolaridad, género y estado civil─ presentan efectos sobre las variables del estudio y sobre algunas subescalas y correlaciones entre los constructos.

scholarly journals Performance of BioFire array or QuickVue influenza A + B test versus a validation qPCR assay for detection of influenza A during a volunteer A/California/2009/H1N1 challenge study

2021 ◽  
Vol 18 (1) ◽  
Author(s):  
David R. McIlwain ◽  
Han Chen ◽  
Maria Apkarian ◽  
Melton Affrime ◽  
Bonnie Bock ◽  
...  
Keyword(s):  
Influenza A ◽  
Rapid Test ◽  
Influenza Viruses ◽  
Qpcr Assay ◽  
Superior Performance ◽  
Qrt Pcr ◽  
Challenge Study ◽  
Test Kit ◽  
2009 H1n1 ◽  
B Test

Abstract Background Influenza places a significant burden on global health and economics. Individual case management and public health efforts to mitigate the spread of influenza are both strongly impacted by our ability to accurately and efficiently detect influenza viruses in clinical samples. Therefore, it is important to understand the performance characteristics of available assays to detect influenza in a variety of settings. We provide the first report of relative performance between two products marketed to streamline detection of influenza virus in the context of a highly controlled volunteer influenza challenge study. Methods Nasopharyngeal swab samples were collected during a controlled A/California/2009/H1N1 influenza challenge study and analyzed for detection of virus shedding using a validated qRT-PCR (qPCR) assay, a sample-to-answer qRT-PCR device (BioMerieux BioFire FilmArray RP), and an immunoassay based rapid test kit (Quidel QuickVue Influenza A + B Test). Results Relative to qPCR, the sensitivity and specificity of the BioFire assay was 72.1% [63.7–79.5%, 95% confidence interval (CI)] and 93.5% (89.3–96.4%, 95% CI) respectively. For the QuickVue rapid test the sensitivity was 8.5% (4.8–13.7%, 95% CI) and specificity was 99.2% (95.6–100%, 95% CI). Conclusion Relative to qPCR, the BioFire assay had superior performance compared to rapid test in the context of a controlled influenza challenge study.

scholarly journals DEM Based Study on Shielded Astronomical Solar Radiation and Possible Sunshine Duration under Terrain Influences on Mars by Using Spectral Methods

2021 ◽  
Vol 10 (2) ◽  
pp. 56
Author(s):  
Siwei Lin ◽  
Nan Chen
Keyword(s):  
Solar Radiation ◽  
Spatial Structure ◽  
Sunshine Duration ◽  
Temporal Structure ◽  
Temporal Distribution ◽  
Planetary Science ◽  
Shielding Effect ◽  
Critical Area ◽  
Martian Surface ◽  
Test Region

Solar radiation may be shielded by the terrain relief before reaching the Martian surface, especially over some rugged terrains. Yet, to date, no comprehensive studies on the spatial structure of shielded astronomical solar radiation (SASR) and the possible sunshine duration (PSD) on Mars have been conducted by previous researchers. Previous studies generally ignored the influences of the terrain on the SASR and PSD, which resulted in a corresponding unexplored field on SASR. The purpose of this paper is to study the Martian spatial-temporal structure of SASR and the PSD under terrain influences. In this paper, the theory of Earth’s SASR, the previous Martian SASR model and the theory of planetary science were combined to propose the SASR model that can be applied to Mars. Then, with the spectrum method theory of geography, we defined two new concepts of spectrums to explore the spatial-temporal distribution of SASR and PSD in different Martian landforms. We found SASR and PSD on Mars were significantly influenced by terrain relief and latitude and showed sufficient regularity, which can be concluded as a gradual attenuation with terrain relief and a regularity of latitude anisotropy. The latitude anisotropy feature is a manifestation of the terrain shielding effect. With the latitude varying, SASR and PSD at different temporal scale generally showed different features with those of Earth, which may be attributed to the imbalanced seasons caused by Martian moving orbits and velocity. Compared to PSD, SASR showed more regular variation under terrain relief and was more influenced by the terrain relief which revealed that SASR is more sensitive to terrain relief than PSD. Additionally, the critical area is a quantitative index to reflect the stable spatial structure of SASR and PSD in different landforms and may be viewed as the minimum test region of sample areas. The corresponding result of the experiments herein indicated that either spectrum can effectively depict the spatial-temporal distribution of SASR and PSD on Mars under terrain relief and deepen the understanding of the variation of SASR and PSD influences by terrain. The critical area of either spectrum can be employed to explore and determine the stable spatial structure of SASR and PSD in different landforms. The proposed Martian SASR model and the new spectral method theory shed new light on revealing the spatial-temporal structure of SASR and PSD under terrain influences on Mars.

scholarly journals The Upworthy Research Archive, a time series of 32,487 experiments in U.S. media

2021 ◽  
Vol 8 (1) ◽  
Author(s):  
J. Nathan Matias ◽  
Kevin Munger ◽  
Marianne Aubin Le Quere ◽  
Charles Ebersole
Keyword(s):  
Data Mining ◽  
Time Series ◽  
Open Access ◽  
Randomized Trial ◽  
Digital Technology ◽  
Behavioral Experiments ◽  
Media Politics ◽  
B Test ◽  
Scientific Questions ◽  
Advance Knowledge

AbstractThe pursuit of audience attention online has led organizations to conduct thousands of behavioral experiments each year in media, politics, activism, and digital technology. One pioneer of A/B tests was Upworthy.com, a U.S. media publisher that conducted a randomized trial for every article they published. Each experiment tested variations in a headline and image “package,” recording how many randomly-assigned viewers selected each variation. While none of these tests were designed to answer scientific questions, scientists can advance knowledge by meta-analyzing and data-mining the tens of thousands of experiments Upworthy conducted. This archive records the stimuli and outcome for every A/B test fielded by Upworthy between January 24, 2013 and April 30, 2015. In total, the archive includes 32,487 experiments, 150,817 experiment arms, and 538,272,878 participant assignments. The open access dataset is organized to support exploratory and confirmatory research, as well as meta-scientific research on ways that scientists make use of the archive.

scholarly journals Correction to: Performance of BioFire array or QuickVue influenza A + B test versus a validation qPCR assay for detection of influenza A during a volunteer A/California/2009/H1N1 challenge study

2021 ◽  
Vol 18 (1) ◽  
Author(s):  
David R. McIlwain ◽  
Han Chen ◽  
Maria Apkarian ◽  
Melton Affrime ◽  
Bonnie Bock ◽  
...  
Keyword(s):  
Influenza A ◽  
Qpcr Assay ◽  
Challenge Study ◽  
2009 H1n1 ◽  
B Test

An amendment to this paper has been published and can be accessed via the original article.

Attention, vigilance and visuospatial function in hospitalized elderly medical patients–relationship to delirium syndromal status and motor subtype profile

2017 ◽  
Vol 41 (S1) ◽  
pp. S490-S490
Author(s):  
C. Daly
Keyword(s):  
Neurocognitive Disorders ◽  
Cognitive Tests ◽  
Medical Patients ◽  
Diagnostic Challenge ◽  
Clock Drawing Test ◽  
Spatial Span ◽  
Visuospatial Function ◽  
Subsyndromal Delirium ◽  
Function Test ◽  
B Test

ObjectiveThe early and efficacious detection of neurocognitive disorders poses a key diagnostic challenge. We examined how nine bedside cognitive tests perform across the spectrum of delirium and motor subtypes.MethodsThe performance on a battery of nine bedside cognitive tests were compared in elderly medical inpatients with DSM-IV delirium, subsyndromal delirium, and no neurocognitive disorder and in different motor subtypes of patients with delirium.ResultsOne hundred and ninety-eight patients (mean age 79.14 ± 8.26) were assessed with no delirium (n = 43), subsyndromal delirium (n = 45), and full syndromal delirium (n = 110). The ability to meaningfully engage with the tests varied from 59% for vigilance B test to 85% for Spatial Span forward test and was found to be least in the full syndromal delirium group. The no delirium group was distinguished from the delirium groups for all the tests and from the full syndromal delirium group for the vigilance B test and global visuospatial function test. The subsyndromal delirium group differed from the full syndromal delirium group in respect of global visuospatial function test, spatial span backwards and vigilance A tests. Patients with full syndromal delirium were best identified using the interlocking pentagons test and clock drawing test. The ability to engage with testing was higher for those in the no subtype group.ConclusionsSimple bedside tests of attention, vigilance, and visuospatial ability are useful to help to distinguish neurocognitive disorders namely subsyndromal delirium from other presentations.Disclosure of interestThe author has not supplied his/her declaration of competing interest.

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