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Новости за 22.07.2022

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A potential relationship between soil disinfestation efficacy and leaf green reflectance

Plos.org 
En

by Steven B. Kim, Steven A. Fennimore, Dong Sub Kim

Soil disinfestation with steam was evaluated as an alternative to fumigation. Following soil disinfestation, plant health has traditionally been measured using plant size and yield. Plant health can be measured in a timely manner more efficiently, more easily and non-destructively using image analysis. We hypothesized that plant health could be quantified and treatments can be differentiated using an RGB (Red, Green, Blue) image analysis program... Читать дальше...

A clustering metaheuristic for large orienteering problems

Plos.org 
En

by Almiqdad Elzein, Gianni A. Di Caro

The Orienteering Problem is a routing problem that commonly appears in mapping, transportation, distribution, and scheduling scenarios. The Orienteering Problem is a challenging NP-hard problem, such that obtaining optimal or near optimal solutions usually requires a significant amount of computation for large and even moderately large instances. As a result, existing algorithms cannot effectively be utilized for solving large Orienteering Problems in an online setting... Читать дальше...

Research status and development of microbial induced calcium carbonate mineralization technology

Plos.org 
En

by Jun Chen, Baolei Liu, Ming Zhong, Chuan Jing, Baoyou Guo

In nature, biomineralization is a common phenomenon, which can be further divided into authigenic and artificially induced mineralization. In recent years, artificially induced mineralization technology has been gradually extended to major engineering fields. Therefore, by elaborating the reaction mechanism and bacteria of mineralization process, and summarized various molecular dynamics equations involved in the mineralization process... Читать дальше...

Translation, cross-cultural adaptation, and validation of the Chinese version of self-efficacy and attitudes for providing Mouth Care scale

Plos.org 
En

by Lan Chen, Liyan Gu, Xianchen Li, Wenyao Chen, Lingjuan Zhang

Background

In recent years, oral care for older people has received extensive attention in long-term care facilities. The Self-Efficacy for Providing Mouth Care (SE-PMC) and Attitudes for Providing Mouth Care (A-PMC) scale evaluated the self-efficacy and attitude of nursing staff while providing oral care. However, whether this scale is valid and reliable for Chinese nursing staff in China remains unverified. This study aims... Читать дальше...

Multilevel theorizing in health communication: Integrating the Risk Perception Attitude (RPA) framework and the Theory of Normative Social Behavior (TNSB)

Plos.org 
En

by Hagere Yilma, Rajiv N. Rimal, Manoj Parida

Research testing the risk perception attitudes (RPA) framework has demonstrated that efficacy can moderate the effect of risk perceptions on behavior. This effect of efficacy has also been seen at the social-level through tests of the theory of normative social behavior (TNSB). We tested if efficacy could bridge normative factors at a social-level and risk perception at an individual-level. Data for this study come from the Reduction in Anemia... Читать дальше...



Association of compassion and empathy with prosocial health behaviors and attitudes in a pandemic

Plos.org 
En

by Melissa M. Karnaze, John Bellettiere, Cinnamon S. Bloss

This investigation examined how dispositional compassion and empathy were associated with prosocial behaviors and attitudes in the SARS-CoV-2 pandemic. Every two weeks from March 22 to June 15, 2020, we fielded a survey to a new cohort of adults in the U.S. Compassion related to whether one stayed home to protect others, more hours spent staying home and distancing from others, and more frequent mask wearing in public, in the past two weeks. Читать дальше...

Новости России
Москва

Выставка «Павка Корчагин — герой Поднебесной»


Testing for Benford’s Law in very small samples: Simulation study and a new test proposal

Plos.org 
En

by Andrea Cerasa

Benford’s Law defines a statistical distribution for the first and higher order digits in many datasets. Under very general condition, numbers are expected to naturally conform to the theorized digits pattern. On the other side, any deviation from the Benford distribution could identify an exogenous modification of the expected pattern, due to data manipulation or even fraud. Many statistical tests are available for assessing the Benford conformity of a sample. However, in some practical applications... Читать дальше...

Accurate interval estimation for the risk difference in an incomplete correlated 2 × 2 table: Calf immunity analysis

Plos.org 
En

by Hezhi Lu, Fengjing Cai, Yuan Li, Xionghui Ou

Interval estimation with accurate coverage for risk difference (RD) in a correlated 2 × 2 table with structural zero is a fundamental and important problem in biostatistics. The score test-based and Bayesian tail-based confidence intervals (CIs) have good coverage performance among the existing methods. However, as approximation approaches, they have coverage probabilities lower than the nominal confidence level for finite and moderate sample sizes. Читать дальше...

Integral, mean and covariance of the simplex-truncated multivariate normal distribution

Plos.org 
En

by Matthew P. Adams

Compositional data, which is data consisting of fractions or probabilities, is common in many fields including ecology, economics, physical science and political science. If these data would otherwise be normally distributed, their spread can be conveniently represented by a multivariate normal distribution truncated to the non-negative space under a unit simplex. Here this distribution is called the simplex-truncated multivariate normal distribution. For calculations on truncated distributions... Читать дальше...


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