Results 31 to 40 of about 160,344 (293)
Protein pyrophosphorylation by inositol pyrophosphates — detection, function, and regulation
FEBS Letters, EarlyView.Protein pyrophosphorylation is an unusual signaling mechanism that was discovered two decades ago. It can be driven by inositol pyrophosphate messengers and influences various cellular processes. Herein, we summarize the research progress and challenges of this field, covering pathways found to be regulated by this posttranslational modification as ...
Sarah Lampe +3 more
wiley +1 more source
Ranked Set Sampling Based Regression Estimators in Two-Stage Sampling Design
Journal of Statistical Theory and Applications (JSTA)This paper examines the use of ranked set sampling in the second stage of the two-stage sampling design to improve the regression estimator. The mean square errors of the suggested estimators are computed, and both theoretical and simulation results ...
Worthing Yanglem, Phrangstone Khongji
doaj +1 more source
Assessing reduction of cluster size to estimate wood volume in an Amazonian forest
Acta Amazonica, 2021 While the Brazilian National Forest Inventory (NFI) is in progress, there is a growing demand to understand the effect of cluster size on the accuracy and precision of forest-attribute estimation.
Nivea Maria Mafra RODRIGUES +4 more
doaj +1 more source
A composite estimator for stratified two stage cluster sampling
Communications for Statistical Applications and Methods, 2016 Stratified cluster sampling has been widely used for effective parameter estimations due to reductions in time and cost. The probability proportional to size (PPS) sampling method is used when the number of cluster element are significantly different.
Sang Eun Lee, Pu Reum Lee, Key-Il Shin
openaire +2 more sources
FEBS Letters, EarlyView.We reconstituted Synechocystis glycogen synthesis in vitro from purified enzymes and showed that two GlgA isoenzymes produce glycogen with different architectures: GlgA1 yields denser, highly branched glycogen, whereas GlgA2 synthesizes longer, less‐branched chains.
Kenric Lee +3 more
wiley +1 more source
Measuring Access and Practice: Designing a Survey Methodology for the Hygiene, Sanitation and Water Sector [PDF]
Access to safe water and sanitary means of excreta disposal are essential elements of human development and poverty alleviation. It is estimated that one in four people in the developing world lacks access to water while over half the population has ...
Bostoen, Kristof
core +1 more source
Two-stage nonparametric bootstrap sampling with shrinkage correction for clustered data [PDF]
The Stata Journal: Promoting communications on statistics and Stata, 2013 This article describes a new Stata command, tsb, for performing a stratified two-stage nonparametric bootstrap resampling procedure for clustered data. Estimates for uncertainty around the point estimate, such as standard error and confidence intervals, are derived from the resultant bootstrap samples.
Ng, Edmond S.-W. +5 more
openaire +2 more sources
International Journal of Health Geographics, 2012 Background Mortality estimates can measure and monitor the impacts of conflict on a population, guide humanitarian efforts, and help to better understand the public health impacts of conflict.
Galway LP +8 more
doaj +1 more source
FEBS Letters, EarlyView.In this study, we found that human cervical‐derived adipocytes maintain intracellular iron level by regulating the expression of iron transport‐related proteins during adrenergic stimulation. Melanotransferrin is predicted to interact with transferrin receptor 1 based on in silico analysis.
Rahaf Alrifai +9 more
wiley +1 more source
An optimal multivariate cluster sampling design
, 2019 This article presents a problem of determining optimum cluster size and sampling units in multivariate surveys. When a cluster sampling design is to be used and more than one characteristic is under study, it is usually not advisable to use the ...
Khan, MGM +3 more
core +1 more source