Mathematics, Statistics & Physics: Recent submissions
Now showing items 181-200 of 728
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ESTIMATION OF THE LOCATION-SCALE PARAMETERS BASED ON RANKED SET SAMPLING COMBINED WITH ADDITIONAL BINOMIAL INFORMATION
( ISOSS PUBLICATIONS , 2023 , Article)In this paper, we propose a modified version of ranked set sample which allows for the incorporation of more information in the inference procedure at almost no cost. This procedure is studied for the location-scale family ... -
Inference Based on New Pareto-Type Records With Applications to Precipitation and Covid-19 Data
( International Academic Press , 2023 , Article)We consider estimation and prediction of future records based on observed records from the new Pareto type distribution proposed recently by Bourguignon et al. (2016), ¡°M. Bourguignon, H. Saulo, R. N. Fernandez, A new ... -
Turning point in COVID-19 severity and fatality during the pandemic: a national cohort study in Qatar
( BMJ Publishing Group , 2023 , Article)Objective To assess the evolution of COVID-19 severity and fatality in a unique setting that consistently applied, throughout the pandemic, rigorous and standardised criteria for defining severe COVID-19 outcomes. Methods ... -
History of primary-series and booster vaccination and protection against Omicron reinfection
( American Association for the Advancement of Science , 2023 , Article)Laboratory evidence suggests a possibility of immune imprinting for severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection. We investigated the differences in the incidence of SARS-CoV-2 reinfection in a ... -
Student perspectives on the integration of artificial intelligence into healthcare services
( SAGE Publications Inc. , 2023 , Article)Background: Healthcare workers are often overworked, underfunded, and face many challenges. Integration of artificial intelligence into healthcare service provision can tackle these challenges by relieving burdens on ... -
Novel LiAlO2 Material for Scalable and Facile Lithium Recovery Using Electrochemical Ion Pumping
( MDPI , 2023 , Article)In this study, α-LiAlO2 was investigated for the first time as a Li-capturing positive electrode material to recover Li from aqueous Li resources. The material was synthesized using hydrothermal synthesis and air annealing, ... -
Multi-species attributes as the condition for adaptive sampling of rare species using two-stage sequential sampling with an auxiliary variable
( The Modelling and Simulation Society of Australia and New Zealand Inc , 2011 , Conference Paper)Assessing populations of rare species is challenging because of the large effort required to locate patches of occupied habitat and achieve precise estimates of density and abundance. The presence of a rare species has ... -
Use of post-stratification in composite sampling for estimating mean
( Springer , 2011 , Article)We show with the results of a study conducted in the Hamadan Province, Iran as to how the use of composite sampling for estimating mean zinc concentration in the soil can help reduce analytical costs by reducing the number ... -
Complete allocation sampling: An efficient and easily implemented adaptive sampling design
( Wiley , 2010 , Article)Adaptive sampling designs are becoming increasingly popular in environmental science, particularly for surveying rare and aggregated populations. An adaptive sample is one in which the survey design is modified, or adapted, ... -
An unbalanced ranked-set sampling method to get more than one sample from each set
( American Association for Public Opinion Research , 2018 , Article)In ranked-set sampling, the restriction of selecting just one individual from each set may require too many sets. We propose a new version of ranked-set sampling that relaxes this restriction. Our new design uses stratified ... -
Asymptotic properties of the sample mean in adaptive stratified sequential sampling with multiple selection criteria
( Iranian Mathematical Society , 2013 , Article)We extend the method of adaptive two-stage sequen-tial sampling to include designs where there is more than one crite-ria used in deciding on the allocation of additional sampling effort. These criteria, or conditions, can ... -
Adaptive and unequal probability survey designs for environmental management
( The Modelling and Simulation Society of Australia and New Zealand Inc , 2011 , Conference Paper)Designing an efficient large-area survey is a challenge, especially in environmental science when many populations are rare and clustered. Adaptive and unequal probability sampling designs are appealing when populations ... -
Regression-type estimators for adaptive two-stage sequential sampling
( Springer , 2013 , Article)Adaptive two-stage sequential sampling (ATSSS) design was developed to observe more rare units and gain higher efficiency, in the sense of having a smaller variance estimator, than conventional sampling designs with equal ... -
Bootstrap confidence intervals for adaptive cluster sampling design based on Horvitz-Thompson type estimators
( Kluwer Academic Publishers , 2014 , Article)Perez and Pontius (J Stat Comput Simul 76:755-764, 2006) introduced several bootstrap methods under adaptive cluster sampling using a Horvitz-Thompson type estimator. Using a simulation study, they showed that their proposed ... -
Horvitz-thompson estimator of population mean under inverse sampling designs
( Iranian Mathematical Society , 2012 , Article)Inverse sampling design is generally considered to be an appropriate technique when the population is divided into two subpopulations, one of which contains only a few units. Here, we de- rive the Horvitz-Thompson estimator ... -
Application of Balanced Acceptance Sampling to an Intertidal Survey
( De Gruyter Open Ltd , 2017 , Article)In ecological studies, the population of interest is often spread over a large area. In these studies, obtaining a sample with good spatial coverage is an important feature in the design of a survey. In most cases adjacent, ... -
Adaptive two-stage inverse sampling design to estimate density, abundance, and occupancy of rare and clustered populations
( Public Library of Science , 2021 , Article)Sampling rare and clustered populations is challenging because of the effort required to find rare units. Heuristically, a practitioner would prefer to discontinue sampling in areas where rare units of interest are apparently ... -
Sampling of Multiple Variables Based on Partially Ordered Set Theory
( Iranian Statistical Society , 2021 , Article)We introduce a new method for ranked set sampling with multiple criteria. The method relaxes the restriction of selecting just one individual variable from each ranked set. Under the new method for ranking, units are ranked ... -
Students Impression About Using Mobile Phones in Classroom
( Kassel University Press GmbH , 2020 , Article)Mobile phones are widely used by university students and there is a controversial topic whether students should be able to use them freely during lectures. A survey was distributed seeking student opinions on using mobile ... -
The effect of graphene on the activation energy of grain growth for the nanocrystalline thermoelectric n‑type Bi2Te2.7Se0.3
(2022 , Article)Even though bismuth telluride is frequently produced by mechanical alloying for thermoelectric materials, no data has been published addressing the thermal behavior and activation energy of the milled n-type Bi2Te2.7Se0.3 ...