Results 51 to 60 of about 415,967 (312)
Journal of Research in Education Sciences, 2011 大型調查研究常採用多階段分層叢集抽樣，檢視臺灣學生歷年來參與TIMSS 研究的結果顯示，其平均表現之標準誤常較他國稍大。應TIMSS 專責抽樣之單位要求，本研究旨在推導設計二階段分層叢集抽樣時即可預估標準誤的公式，以利選擇較佳分層架構，達減少標準誤的目標，並進行三個分析檢查其有效性。分析一將30 個參與TIMSS 2007 的國家資料，用該公式與《TIMSS 技術手冊》建議之刀切重複取樣法，分別估算各國學生平均科學成績之標準誤，發現兩者之線性相關達 .98。分析二以29 個連續參加TIMSS ...
任宗浩 Tsung-Hau Jen +2 more
doaj +1 more source
Dietary Protein Intake and Peritoneal Protein Losses in Peritoneal Dialysis Patients
Therapeutic Apheresis and Dialysis, EarlyView.ABSTRACT Introduction Peritoneal dialysis (PD) patients lose protein in their waste dialysate, potentially increasing their risk for malnutrition. We wished to determine whether there was any association between losses and dietary protein intake (DPI). Methods DPI was assessed from 24‐h dietary recall using Nutrics software.
Haalah Shaaker, Andrew Davenport
wiley +1 more source
Using the Superpopulation Model for Imputations and Variance Computation in Survey Sampling [PDF]
Statistika: Statistics and Economy Journal, 2012 This study is aimed at variance computation techniques for estimates of population characteristics based on survey sampling and imputation. We use the superpopulation regression model, which means that the target variable values for each statistical unit
Petr Novák, Václav Kosina
doaj
Therapeutic Apheresis and Dialysis, EarlyView.ABSTRACT Background Therapeutic apheresis (TA) is an established treatment modality for hematologic, neurologic, and immunologic disorders, yet access remains severely limited in sub‐Saharan Africa. Donor apheresis, including platelet apheresis collection from healthy donors, represents an important complementary modality supporting blood product ...
Nosa Bazuaye +33 more
wiley +1 more source
The analysis of the NSW wheat variety database. II. Variance component estimation
, 1996 The efficiency of various trialling systems for wheat variety evaluation in New South Wales (NSW) is considered. This involved the estimation of the variance components due to genotype, genotype-by-year, genotype-by-location and genotype-by-year-by ...
Thomson, F. M. +4 more
core +1 more source
Therapeutic Apheresis and Dialysis, EarlyView.ABSTRACT Introduction Patients requiring long‐term continuous renal replacement therapy (CRRT) generally have poor prognoses. This study evaluated whether adding continuous intravenous sodium infusion (cIVNa) is associated with improved hemodynamics and outcomes in patients undergoing long‐term CRRT for ≥ 7 days.
Akinori Yamaguchi +6 more
wiley +1 more source
FEBS Letters, EarlyView.Fluorescent probes allow dynamic visualization of phosphoinositides in living cells (left), whereas mass spectrometry provides high‐sensitivity, isomer‐resolved quantitation (right). Their synergistic use captures complementary aspects of lipid signaling. This review illustrates how these approaches reveal the spatiotemporal regulation and quantitative
Hiroaki Kajiho +3 more
wiley +1 more source
On the Impact of Response Patterns on Survey Estimates from Access Panels
Survey Research Methods, 2013 Household and individual surveys increasingly gain importance in policy support and other areas. However, the raising number of surveys leads to reduced response rates.
Tobias Enderle +2 more
doaj +1 more source
FEBS Letters, EarlyView.The Ile181Asn variant of human UDP‐xylose synthase (hUXS1), associated with a short‐stature genetic syndrome, has previously been reported as inactive. Our findings demonstrate that Ile181Asn‐hUXS1 retains catalytic activity similar to the wild‐type but exhibits reduced stability, a looser oligomeric state, and an increased tendency to precipitate ...
Tuo Li +2 more
wiley +1 more source
Improved Estimation of the Intrinsic Dimension of a Hyperspectral Image Using Random Matrix Theory
Remote Sensing, 2019 Many methods have been proposed in the literature for estimating the number of materials/endmembers in a hyperspectral image. This is sometimes called the “intrinsic” dimension (ID) of the image.
Mark Berman
doaj +1 more source