Young H. Chun

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In this study, we investigated the effects of the ethanol extract of aerial parts of Raphanus sativus L. (ERL) on breast cancer cell proliferation and gene expression associated with cell proliferation and apoptosis in MDA-MB-231 human breast cancer cells. The MDA-MB-231 cells were cultured in the presence or absence of various concentrations (100, 200, or(More)
A complex product, such as a software system, is often inspected more than once in a sequential manner to further improve its quality and reliability. In such a case, a particularly important task is to accurately estimate the number of errors still remaining in the product after a series of multiple inspections. In the paper, we first develop a maximum(More)
Sometimes a complex software system fails because of errors undiscovered in the design stage of the development process. Detecting these errors early in the process would eliminate many downstream problems. The so-called ''cap-ture–recapture'' model, initially used by biologists to estimate the size of wildlife populations, has been widely used to estimate(More)
We consider the problem of selecting the single best choice when several groups of choices are presented sequentially for evaluation. In the so-called group interview problem, we assume that the values of choices are random observations from a known distribution function and derive the optimal search strategy that maximizes the probability of selecting the(More)
This paper formulates and discusses a series of sequential decision problems of the following common structure: A decision alternative of multiple attributes-that is, a job, an employee, or an investment alternative-is to be selected within a certain fixed length of time. An unknown number of alternatives are presented sequentially, either deterministically(More)
In the classical sequential assignment problem, ''machines'' are to be allocated sequentially to ''jobs'' so as to maximize the expected total return, where the return from an allocation of job j to machine k is the product of the value x j of the job and the weight p k of the machine. The set of m machines and their weights are given ahead of time, but n(More)
ii Acknowledgements There are several people whom I would like to acknowledge for their support during the development of this dissertation. To Dr. Doris L. Carver, my supervising professor, I express my sincere gratitude for her guidance throughout my graduate studies. She helped me to stay focused, to continually move forward toward my goals, as well as(More)