A basic proposition of process assessment models is that higher process maturity is associated wi... more A basic proposition of process assessment models is that higher process maturity is associated with improved project performance and product quality. This study provides empirical evidence to support this proposition by testing the hypothesis that higher process maturity is negatively associated with schedule deviation in software maintenance. Next, the present study investigates whether two process context factors (organizational size and
Statins are mainstay anti-lipidaemic treatments for preventing cardiovascular diseases but also k... more Statins are mainstay anti-lipidaemic treatments for preventing cardiovascular diseases but also known to increase coronary artery calcification (CAC). However, underlying relationship between statin and CAC is still unclear. This study explored the mediating role of five statin-related biochemical factors [i.e., low-density lipoprotein (LDL)-cholesterol, high-density lipoprotein (HDL)-cholesterol, triglyceride, glucose, and high sensitivity C-reactive protein levels]. Seoul Metabolic Syndrome cohort study includes 1370 participants suspected of metabolic syndrome. For causal mediation analysis, the dataset for 2016 including 847 participants with coronary computed tomography without any missing value were analysed using the Mediation package in R software. This study identified a causal mediation mechanism of HDL-cholesterol among the five biochemical factors. It implied that statin treatment increases the HDL-cholesterol level, leading to decreasing the probability of CAC score >...
International journal of health geographics, Jan 29, 2014
A linear programming (LP) model was proposed to create de-identified data sets that maximally inc... more A linear programming (LP) model was proposed to create de-identified data sets that maximally include spatial detail (e.g., geocodes such as ZIP or postal codes, census blocks, and locations on maps) while complying with the HIPAA Privacy Rule's Expert Determination method, i.e., ensuring that the risk of re-identification is very small. The LP model determines the transition probability from an original location of a patient to a new randomized location. However, it has a limitation for the cases of areas with a small population (e.g., median of 10 people in a ZIP code). We extend the previous LP model to accommodate the cases of a smaller population in some locations, while creating de-identified patient spatial data sets which ensure the risk of re-identification is very small. Our LP model was applied to a data set of 11,740 postal codes in the City of Ottawa, Canada. On this data set we demonstrated the limitations of the previous LP model, in that it produces improbable re...
... School of Industrial and Systems Engineering Georgia Institute of Technology Atlanta, Ga rmar... more ... School of Industrial and Systems Engineering Georgia Institute of Technology Atlanta, Ga rmarsten@gtri01 .gatech.edu Matthew J. Saltzman ... 2. Test Problems The computational results of this study were generated using the OBI interior point software package (Optimiza-tion ...
Proceedings Second Asia-Pacific Conference on Quality Software, 2001
The emerging ISO/IEC 15504 standard provides a framework and a model for software process assessm... more The emerging ISO/IEC 15504 standard provides a framework and a model for software process assessment and improvement. There are two requirements for reliable process assessment: internal reliability and external reliability. The objective of the study is to provide an empirical case of external reliability, i.e. the interrater agreement in ISO/IEC 15504-based software process assessment. Interrater agreement implies the extent to
A basic proposition of process assessment models is that higher process maturity is associated wi... more A basic proposition of process assessment models is that higher process maturity is associated with improved project performance and product quality. This study provides empirical evidence to support this proposition by testing the hypothesis that higher process maturity is negatively associated with schedule deviation in software maintenance. Next, the present study investigates whether two process context factors (organizational size and
Statins are mainstay anti-lipidaemic treatments for preventing cardiovascular diseases but also k... more Statins are mainstay anti-lipidaemic treatments for preventing cardiovascular diseases but also known to increase coronary artery calcification (CAC). However, underlying relationship between statin and CAC is still unclear. This study explored the mediating role of five statin-related biochemical factors [i.e., low-density lipoprotein (LDL)-cholesterol, high-density lipoprotein (HDL)-cholesterol, triglyceride, glucose, and high sensitivity C-reactive protein levels]. Seoul Metabolic Syndrome cohort study includes 1370 participants suspected of metabolic syndrome. For causal mediation analysis, the dataset for 2016 including 847 participants with coronary computed tomography without any missing value were analysed using the Mediation package in R software. This study identified a causal mediation mechanism of HDL-cholesterol among the five biochemical factors. It implied that statin treatment increases the HDL-cholesterol level, leading to decreasing the probability of CAC score >...
International journal of health geographics, Jan 29, 2014
A linear programming (LP) model was proposed to create de-identified data sets that maximally inc... more A linear programming (LP) model was proposed to create de-identified data sets that maximally include spatial detail (e.g., geocodes such as ZIP or postal codes, census blocks, and locations on maps) while complying with the HIPAA Privacy Rule's Expert Determination method, i.e., ensuring that the risk of re-identification is very small. The LP model determines the transition probability from an original location of a patient to a new randomized location. However, it has a limitation for the cases of areas with a small population (e.g., median of 10 people in a ZIP code). We extend the previous LP model to accommodate the cases of a smaller population in some locations, while creating de-identified patient spatial data sets which ensure the risk of re-identification is very small. Our LP model was applied to a data set of 11,740 postal codes in the City of Ottawa, Canada. On this data set we demonstrated the limitations of the previous LP model, in that it produces improbable re...
... School of Industrial and Systems Engineering Georgia Institute of Technology Atlanta, Ga rmar... more ... School of Industrial and Systems Engineering Georgia Institute of Technology Atlanta, Ga rmarsten@gtri01 .gatech.edu Matthew J. Saltzman ... 2. Test Problems The computational results of this study were generated using the OBI interior point software package (Optimiza-tion ...
Proceedings Second Asia-Pacific Conference on Quality Software, 2001
The emerging ISO/IEC 15504 standard provides a framework and a model for software process assessm... more The emerging ISO/IEC 15504 standard provides a framework and a model for software process assessment and improvement. There are two requirements for reliable process assessment: internal reliability and external reliability. The objective of the study is to provide an empirical case of external reliability, i.e. the interrater agreement in ISO/IEC 15504-based software process assessment. Interrater agreement implies the extent to
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