Results 251 to 260 of about 226,041 (306)
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Sociological Methods and Research, 2014
Attrition is the process of dropout from a panel study. Earlier studies into the determinants of attrition study respondents still in the survey and those who attrited at any given wave of data collection. In many panel surveys, the process of attrition is more subtle than being either in or out of the study.
Peter Lugtig
exaly +5 more sources
Attrition is the process of dropout from a panel study. Earlier studies into the determinants of attrition study respondents still in the survey and those who attrited at any given wave of data collection. In many panel surveys, the process of attrition is more subtle than being either in or out of the study.
Peter Lugtig
exaly +5 more sources
Molecular and Cellular Endocrinology, 2000
During oogenesis, germ cell numbers sharply decrease when meiosis is initiated. There is solid evidence (DNA ladders, in situ detection) that this loss is through apoptosis. Oocyte apoptosis appears to hit mitotic primordial germ cells (PGC), pachytene oocytes and early primordial follicles.
Reynaud, Karine +1 more
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During oogenesis, germ cell numbers sharply decrease when meiosis is initiated. There is solid evidence (DNA ladders, in situ detection) that this loss is through apoptosis. Oocyte apoptosis appears to hit mitotic primordial germ cells (PGC), pachytene oocytes and early primordial follicles.
Reynaud, Karine +1 more
openaire +3 more sources
Operations Research, 1967
This paper describes a two-person zero-sum game in function space concerning the optimal allocation of a homogenous defense force on different levels of readiness. The second player, the attacker, wants to determine the time for the attack such that the cost is minimized.
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This paper describes a two-person zero-sum game in function space concerning the optimal allocation of a homogenous defense force on different levels of readiness. The second player, the attacker, wants to determine the time for the attack such that the cost is minimized.
openaire +2 more sources
American Journal of Evaluation, 1998
Attrition of subjects from therapeutic treatment programs, long recognized as a bane of evaluation researchers, is the focus of hundreds of studies purporting to explain, measure or correct it. This article discusses the scope and limitations of research regarding the causes of premature termination from psychotherapeutic and substance abuse programs ...
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Attrition of subjects from therapeutic treatment programs, long recognized as a bane of evaluation researchers, is the focus of hundreds of studies purporting to explain, measure or correct it. This article discusses the scope and limitations of research regarding the causes of premature termination from psychotherapeutic and substance abuse programs ...
openaire +1 more source
Science, 2003
The recently published NIH Roadmap proposes that public-sector science should place increased emphasis on the development of new therapeutics and diagnostics based on the fruits of fundamental research. Such “translational research” activities, traditionally the province of the private sector, have long been compromised by high rates of attrition ...
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The recently published NIH Roadmap proposes that public-sector science should place increased emphasis on the development of new therapeutics and diagnostics based on the fruits of fundamental research. Such “translational research” activities, traditionally the province of the private sector, have long been compromised by high rates of attrition ...
openaire +2 more sources
Journal of Mathematical Biology, 2006
This article treats the problem of the sharp front observed when a diffusing substance interacts irreversibly with binding sites within the medium. The model consists of two simultaneous partial differential equations that are nonlinear and cannot be solved in closed form.
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This article treats the problem of the sharp front observed when a diffusing substance interacts irreversibly with binding sites within the medium. The model consists of two simultaneous partial differential equations that are nonlinear and cannot be solved in closed form.
openaire +3 more sources
2011
'Language attrition' describes the loss of, or changes to, grammatical and other features of a language as a result of declining use by speakers who have changed their linguistic environment and language habits. In such a situation there may, for example, be simplification in the tense system or in certain properties of subordinate clauses; some ...
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'Language attrition' describes the loss of, or changes to, grammatical and other features of a language as a result of declining use by speakers who have changed their linguistic environment and language habits. In such a situation there may, for example, be simplification in the tense system or in certain properties of subordinate clauses; some ...
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2019
This chapter looks at how the study of native language (L1) phonological attrition reveals that the system of phonological contrasts of the L1 may change as a consequence of new language (L2) acquisition in adulthood. It also reveals that changes at the system level may underpin the variable pronunciation patterns that have been observed in phonetic ...
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This chapter looks at how the study of native language (L1) phonological attrition reveals that the system of phonological contrasts of the L1 may change as a consequence of new language (L2) acquisition in adulthood. It also reveals that changes at the system level may underpin the variable pronunciation patterns that have been observed in phonetic ...
openaire +2 more sources