Korean Electoral Behavior: The 1992 and 1997 Presidential Elections

This is a study of Korean presidential elections. Its purpose is to determine how Koreans voted in the 1992 and 1997 presidential elections and to examine the factors that contributed to winners. In addition, the study compares the two elections by developing three models: candidate choice, voter turnout and political interest models. Using post election data from the Korean Social Science Data Center a multinomial logit regression was used in the candidate choice model. It shows that Korean voters selected their candidates mainly in terms of interest in the elections, age, orientation toward the governing or opposition parties, the regional effects of the Southwest (Honam) and the Southeast (Youngnam), and the evaluation of merged parties in 1992 or a united candidacy of parties in 1997. A Monte Carlo simulation was also employed to test the traditional assumption of candidate strength. It indicates that Kim Young-Sam had a more cohesive support from his older supporters in the 1992 election while Kim Dae-Jung had a greater cohesive support from his older supporters in the 1997 election. Both Kim Young-Sam's and Kim Dae-Jung's loyalists were crucial to the winning candidates in the 1992 and 1997 elections respectively. How did people vote? To address this question a logit analysis of voter turnout was employed. Comparing the 1997 election to that of 1992 the findings suggest that low-probability voters in 1997 had: low efficacy, a negative evaluation of the Central Election Management Commission, claimed to be independent, young, and lived in areas other than Youngnam and Honam. Their lower turnout was a significant factor in the opposition candidate, Kim Dae-Jung's election. Finally, since political interest is closely related to political participation, an ordered logit model of political interest was developed. The results showed that the media and popularity of major candidates significantly contributed to Korean voters' interest in the elections

Linear operators that strongly preserve regularity of fuzzy matrices

An $ntimes n$ fuzzy matrix $A$ is called {regular} if there is an $ntimes n$ fuzzy matrix $G$ such that $AGA=A$. We study the problem of characterizing those linear operators $T$ on the fuzzy matrices such that $T(X)$ is regular if and only if $X$ is. Consequently, we obtain that $T$ strongly preserves regularity of fuzzy matrices if and only if there are permutation matrices $P$ and $Q$ such that it has the form $T(X)=PXQ$ or $T(X)=PX^tQ$ for all fuzzy matrices $X$

Linear preservers of term ranks of matrices over semirings

AbstractThe term rank of a matrix A over a semiring S is the least number of lines (rows or columns) needed to include all the nonzero entries in A. In this paper, we study linear operators that preserve term ranks of matrices over S. In particular, we show that a linear operator T on matrix space over S preserves term rank if and only if T preserves term ranks 1 and α(≥2) if and only if T preserves two consecutive term ranks in a restricted condition. Other characterizations of term-rank preservers are also given

Linear Operators That Preserve Two Genera of a Graph

If a graph can be embedded in a smooth orientable surface of genus g without edge crossings and can not be embedded on one of genus g − 1 without edge crossings, then we say that the graph has genus g. We consider a mapping on the set of graphs with m vertices into itself. The mapping is called a linear operator if it preserves a union of graphs and it also preserves the empty graph. On the set of graphs with m vertices, we consider and investigate those linear operators which map graphs of genus g to graphs of genus g and graphs of genus g + j to graphs of genus g + j for j ≤ g and m sufficiently large. We show that such linear operators are necessarily vertex permutations

A Study on the Healthy Housing Quality of Multi-family Attached House According to Dwelling Unit Age

AbstractThe purpose of this study is to understand the healthy housing quality of four different multi-family attached house complexes that the constructions were finished at different years. In order to evaluate their healthy housing quality, the evaluation indicators of healthy housing, that have already existed, were used and the four complexes with different dwelling unit ages, located in Busan of Korea, were evaluated. For this, this study carry out residents’ evaluations of healthy housing quality through surveys on their satisfaction, and the study mainly identified characteristic according to dwelling unit age. According to the study, the health housing quality of multi-family attached house, of which the dwelling unit age is 10, begins to decrease in terms of managerial aspect. The healthy housing quality of social and managerial aspects is important for dwellers. The evaluation results can then be utilized to develop guidelines to manage and maintain healthy housing environments for apartments

Multi-Color Luminescence Transition of Upconversion Nanocrystals via Crystal Phase Control with SiO2 for High Temperature Thermal Labels

Upconversion nanocrystals (UCNs)-embedded microarchitectures with luminescence color transition capability and enhanced luminescence intensity under extreme conditions are suitable for developing a robust labeling system in a high-temperature thermal industrial process. However, most UCNs based labeling systems are limited by the loss of luminescence owing to the destruction of the crystalline phase or by a predetermined luminescence color without color transition capability. Herein, an unusual crystal phase transition of UCNs to a hexagonal apatite phase in the presence of SiO2 nanoparticles is reported with the enhancements of 130-fold green luminescence and 52-fold luminance as compared to that of the SiO2-free counterpart. By rationally combining this strategy with an additive color mixing method using a mask-less flow lithography technique, single to multiple luminescence color transition, scalable labeling systems with hidden letters-, and multi-luminescence colored microparticles are demonstrated for a UCNs luminescence color change-based high temperature labeling system