In large-scale educational assessments missing data are not uncommon. In fact, two missing data processes can be discerned. Firstly, non-response can be caused by the inability of test takers to complete the entire test, which leads to missingness at the end of the assessment (“not-reached items”). Secondly, test takers may omit certain responses well before reaching their last answered item (“skipped items”). Both missing-data processes may be related to the proficiency of the test taker and, hence, cause non-ignorable missingness (Rubin, 1976; Little & Rubin, 1987). One strategy to reduce possible bias is to model these processes. Current psychometric solutions focus on only one of these two missing-data processes (Holman & Glas, 2005; Gl...
Analytic optimization of a thermoelectric junction often introduces several simplifying assumptionsi...
近年來,由於雙親性嵌段共聚物特殊之自組裝結構型態受到廣泛的研究及討論,對於奈米結構材料之製備與應用開啟了另一個新的途徑。但要如何精準的控制雙親性嵌段共聚物於材料製備過程中的奈米結構尺寸,仍尚未被完整而...
The PD-regulators design problem for the singularly perturbed control system is considered in the pa...
In large-scale assessments two missing responses can be discerned: “not-reached” and “skipped” respo...
A sufficient literature is available for the wavelet error of approximation of certain functions in ...
A series of simple adaptive controllers with varying levels of complexity were designed, implemented...
Several strongly correlated electronic materials, such as FeSe, are thought to manifest quantum cri...
The stability of a kind of cooperative model incorporating harvesting is revisited in this paper. By...
Evaporation and condensation at a liquid-vapor interface is important for long-term, in-space cryoge...
The main purpose of this paper is to study the sensitivity analysis for nonlinear set-valued variati...
We show that the spectrum of a bosonic open 2-brane does not contain any massless states to take the...
This presentation describes the development of a numerical model that couples the thermal interactio...
An uncertainty analysis of a common configuration of electric propulsion thrust stand is presented. ...
This presentation gives examples of NASA capability in using commercial tools to solve real world pr...
In order to provide a complete description of a materials thermoelectric power factor, in addition t...
Analytic optimization of a thermoelectric junction often introduces several simplifying assumptionsi...
近年來,由於雙親性嵌段共聚物特殊之自組裝結構型態受到廣泛的研究及討論,對於奈米結構材料之製備與應用開啟了另一個新的途徑。但要如何精準的控制雙親性嵌段共聚物於材料製備過程中的奈米結構尺寸,仍尚未被完整而...
The PD-regulators design problem for the singularly perturbed control system is considered in the pa...
In large-scale assessments two missing responses can be discerned: “not-reached” and “skipped” respo...
A sufficient literature is available for the wavelet error of approximation of certain functions in ...
A series of simple adaptive controllers with varying levels of complexity were designed, implemented...
Several strongly correlated electronic materials, such as FeSe, are thought to manifest quantum cri...
The stability of a kind of cooperative model incorporating harvesting is revisited in this paper. By...
Evaporation and condensation at a liquid-vapor interface is important for long-term, in-space cryoge...
The main purpose of this paper is to study the sensitivity analysis for nonlinear set-valued variati...
We show that the spectrum of a bosonic open 2-brane does not contain any massless states to take the...
This presentation describes the development of a numerical model that couples the thermal interactio...
An uncertainty analysis of a common configuration of electric propulsion thrust stand is presented. ...
This presentation gives examples of NASA capability in using commercial tools to solve real world pr...
In order to provide a complete description of a materials thermoelectric power factor, in addition t...
Analytic optimization of a thermoelectric junction often introduces several simplifying assumptionsi...
近年來,由於雙親性嵌段共聚物特殊之自組裝結構型態受到廣泛的研究及討論,對於奈米結構材料之製備與應用開啟了另一個新的途徑。但要如何精準的控制雙親性嵌段共聚物於材料製備過程中的奈米結構尺寸,仍尚未被完整而...
The PD-regulators design problem for the singularly perturbed control system is considered in the pa...