Results 61 to 70 of about 3,490,280 (180)

Post-hoc Evaluation of Sample Size in a Regional Digital Soil Mapping Project

open access: yesLand
The transition from conventional soil mapping (CSM) to digital soil mapping (DSM) not only affects the final map products, but it also affects the concepts of scale, resolution, and sampling intensity.
Daniel D. Saurette   +4 more
doaj   +1 more source

Deductive semiparametric estimation in Double-Sampling Designs with application to PEPFAR

open access: yes, 2019
Non-ignorable dropout is common in studies with long follow-up time, and it can bias study results unless handled carefully. A double-sampling design allocates additional resources to pursue a subsample of the dropouts and find out their outcomes, which ...
Frangakis, Constantine   +2 more
core  

Good Practices for Object-Based Accuracy Assessment

open access: yesRemote Sensing, 2017
Thematic accuracy assessment of a map is a necessary condition for the comparison of research results and the appropriate use of geographic data analysis.
Julien Radoux, Patrick Bogaert
doaj   +1 more source

A jackknife variance estimator for self-weighted two-stage samples

open access: yes, 2013
Self-weighted two-stage sampling designs are popular in practice as they simplify field-work. It is common in practice to compute variance estimates only from the first sampling stage, neglecting the second stage.
Berger, Y.G., Escobar, E.L.
core   +1 more source

When Should You Adjust Standard Errors for Clustering?

open access: yes, 2017
In empirical work in economics it is common to report standard errors that account for clustering of units. Typically, the motivation given for the clustering adjustments is that unobserved components in outcomes for units within clusters are correlated.
Abadie, Alberto   +3 more
core   +1 more source

Psychological Intervention for Button Phobic [PDF]

open access: yes, 2011
Behavior therapy approach is used in psychological intervention of button phobic, including systematic desensitization, relaxation, cognitive-behavioral therapy, modelling and skill training therapy.
Nanik, Nanik
core  

Model-Driven Data Collection for Biological Systems

open access: yes, 2014
For biological experiments aiming at calibrating models with unknown parameters, a good experimental design is crucial, especially for those subject to various constraints, such as financial limitations, time consumption and physical practicability.
Lin, Xiao, Terejanu, Gabriel
core   +1 more source

Error evaluation for difference approximations to ordinary differential equations [PDF]

open access: yes, 1971
Method involves relationships between errors introduced by using finite sampling rates and parameters describing specific numerical method used.
Hammond, J. L., Jr.
core   +1 more source

Implementing PIRLS in two languages: a New Zealand perspective

open access: yesFrontiers in Education
As a former British colony, New Zealand is most often viewed as an English-speaking nation. While accurate, this descriptor does not provide insight into New Zealand’s post-colonial history and the attempts starting late last century to address the ...
Megan Chamberlain, Hannah Bennett
doaj   +1 more source

Sampling parental cooperation: temporal fluctuations in starling provisioning and implications for methodology

open access: yesThe European Zoological Journal
Research on parental cooperation is an emerging subfield of behavioural ecology that often lacks standardized methodological framework. A common limitation is the failure to repeatedly sample parental activity throughout the entire nestling stage ...
E. Węgrzyn   +3 more
doaj   +1 more source

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