• Journal of KIISE:Computing Practices and Letters
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• 제8권2호
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• pp.174-182
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• 2002

The object-oriented design methods and their CASE tools are widely used in practice by many real-time software developers. However, object-oriented CASE tools require an additional step of identifying tasks from a given design model. Unfortunately, it is difficult to automate this step for a couple of reasons: (1) there are inherent discrepancies between objects and tasks; and (2) it is hard to derive tasks while maximizing real-time schedulability since this problem makes a non-trivial optimization problem. As a result, in practical object-oriented CASE tools, task identification is usually performed in an ad-hoc manner using hints provided by human designers. In this paper, we present a systematic, schedulability-aware approach that can help mapping real-time object-oriented models to multi-threaded implementations. In our approach, a task contains a group of mutually exclusive transactions that may possess different periods and deadline. For this new task model, we provide a new schedulability analysis algorithm. We also show how the run-time system is implemented and how executable code is generated in our frame work. We have performed a case study. It shows the difficulty of task derivation problem and the utility of the automated synthesis of implementations as well as the Inappropriateness of the single-threaded implementations.

• Cartoon and Animation Studies
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• 통권16호
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• pp.101-112
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• 2009

The purpose of this study is to analyze trilogy by means of semiotics. trilogy constructs a story as a whole while each piece delivers a concluded ending. This study used 'modele actantiel' and 'carre semiotique' of Greimas in order to clarify not only the meaning structure but also the course of narrative of . is a compelling story which reverses the fairy tale of a beautiful princess and a heroic prince. Each piece of the trilogy unfolds as following; (1)ls the love of a princess and an ogre possible? (2)Can the marriage of the couple get confirmed? (3)Can Shrek be free again? The repeated meaning structure of trilogy is the binary opposition of nature versus culture, and the narrative course forms the meaning square on the basis of the opposition. Human culture represented by the lord Farquaad and Duloc castle signifies cleanness, order, complex, anxiety, paranoia, authoritarian, and violent. On the contrary, Nature represented by Shrek and the swamp signifies barbarity, freedom, confident, maturity, unstrained, and humar. The meaning of Shrek series is generated by the structure of the basic discrimination of culture versus nature. However, as story twists the bias and fixed idea, the meaning structure of Shrek shows a unique relationship of culture and nature. Although Shrek, an ogre, lives alone in a swamp because of the bias of human world, he is depicted as self-sufficient, comfort, and broad-minded. On the basis of this meaning structure, Shrek is not a story that an ogre(nature) strives to enter the human culture, nor a story that nature wins a victory at the confrontation between culture and nature, but a story that human(culture) and ogre(nature) overcome their fixed ideas through the transition from culture to nature and vice versa.

• The Journal of the Korea Contents Association
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• 제18권10호
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• pp.320-334
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• 2018

The purpose of this study is to analyze research trends in international development and cooperation on education and to suggest directions for the Korean teachers and teacher education to achieve 'Sustainable Development Goals (SDGs).' The examination of 8 databases resulted in the identification of 2,945 studies, and 6 of these references met the inclusion criteria for systemic review. Major findings revealed that pre- and in-service teachers recognized the necessity of international development education but had a low degree of teacher efficacy. The teachers who participated in ODA education programs have experienced difficulties due to insufficient understanding of local sites and role performance. Then, a couple of studies of mathematics and early childhood education compared the Korean national curriculum and education system with developing countries'. Lastly, it is important to have a sustainable system which promotes all teachers, including retired ones, in global development and cooperation on education. For the successful achievement of SDGs, Korean teachers should develop their expertise, a deep understanding of partner countries, and stable quality education for the underprivileged.

• Journal of the Korea Academia-Industrial cooperation Society
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• 제18권5호
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• pp.692-699
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• 2017

The purpose of this study is to investigate the display fatigue quantitatively when operating 2D and HMD-based 3D VR bicycles. Though it is generally accepted that the display fatigue induced by 3D VR is greater than that induced by 2D VR, there have been few studies which attempted to measure the display fatigue scientifically. The subjective degree of cybersickness and quantitative flicker fusion frequency (FFF) were measured in twenty subjects (Male 10, Female 10) before and after they operated 2D and 3D VR bicycles for 5 min. Two dependent variables affected by the 2D and 3D VR displays were analyzed and compared statistically based on scientific evidence and research. This study showed that 3D VR resulted in a significantly higher cybersickness rate and a significant lower FFF rate than 2D VR. Given the current propensity to couple VR techniques with exercise equipment, it seems appropriate to verify the general beliefs through scientific methods and experimental measures such as the FFF and cybersickness questionnaires.

• Korea journal of population studies
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• 제19권1호
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• pp.45-72
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• 1996

The main purpose of this study is to analyze the level of fertility of Koreans in China in comparison to Hans. From the demographic perspective, this paper attempts to develop explanation for Korean immigration to northeast China since the mid 19th century. Of interest are the trend of population growth and geographic distribution of Koreans in China Attention is also given to the comparison of the demographic and socioeconomic characteristics between Koereans and Hans in China. The research is based on the raw data files of the 1990 Population Census from Jilin Province and Yanbian Korean Prefecture. The findings of the analysis suggest that the level of fertility of Koreans in China is substantially lower than those of Hans and other ethnic minority. This appears to be particularly true for Koreans residing in the regions densely populated with Koreans. The results of ANOVA and MCA confirm that the ethnic factor does have significant effects on the level of fertility. The lowest fertility of Koreans is found to be consistent after adjusting the effects of demographic and socioeconomic characteristics of the couple and the household. Despite the recent uprising of the sex ratio at birth in China, it is found in this study that the pattern of sex ratios for Koreans in Jilin Province and Yanbian Korean Prefecture has been fairly balanced and stable. Finally, Koreans are found to have higher level of child mortality than Hans and other ethnic minority.

• Korea journal of population studies
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• 제31권2호
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• pp.77-100
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• 2008

This study explores the implications of increasing cohabitation for the Korean family, by comparing the characteristics of cohabiters with those of married couples and of never-married and divorced people. Data are from the Marriage Registration Files for the years of 1997 through 2005 and Social Statistics Survey conducted in 2006. Results from descriptive statistics and logit analysis generally confirm the predictions of the western literature. First, cohabitation is part of overall changes in the family system. Cohabitation is more prevalent among the previously married than among the never married. Second, the socioeconomic status of cohabiting men is lower than that of married men. Third, according to spouses' employment status, educational levels, and age differences, gender roles are more egalitarian among cohabiting couples than among married couples. The finding that cohabiter characteristics are not similar to those of married couples seems to suggest that cohabitation does not simply represent a trial of marriage out of caution, unlike what most media articles assume. Instead, cohabitation may signify some unconventional circumstances forcing the couple to choose it as an alternative to marriage even temporarily. This and other conjectures discussed in this paper need to be reexamined with more rigorous data, as increasing trend of cohabitation seems to be inevitable in the coming years.

• Journal of the Korean Society of Hazard Mitigation
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• 제10권1호
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• pp.35-42
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• 2010

The rapid economic development induced the massive road constructions, becoming bigger and high-speed of the vehicles. However, it brings lots of social problems, such as air pollutions, traffic noise and vibration. Special concrete block for the base course of asphalt pavement is needed to decrease traffic noise such as tire's explosive and vehicles sound, applying Helmholtz Resonators theory to asphalt pavement. If it is applied to the area where it happens considerable noise such as a junction, the street of a housing complex and a residential street, it is one of considerable method to solve the social requirements of noise problem. This research examines couple of laboratory tests for the sound absorption effect of the concrete block and the base concrete block. There are specimens which is fixed hall-size, space, depth as the condition of this research, and these are analysed of noise decrease effect using different condition of the first noise of each vehicle. As a result of analysis data according to vehicle noise volume, measurement distance, a form and size of the hall using the base concrete block, the use of special concrete base showed a good alternative solution for decreasing traffic noise level, from 4 dB to 9 dB.

• Korean Journal of Social Welfare
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• 제61권4호
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• pp.5-33
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• 2009

This study attempted to evaluate the effectiveness of the Supportive Project for the Priority Region of Educational Welfare Investment(SPPREWI) which has been put into action in Korea as a part of national policies for poor school children. In so doing this study aimed to test SPPREWI's legitimacy as well as whether we have to continue this program or not. In order to fulfill this research purpose researchers identified several outcome indicators of SPPREWI, which represent psychosocial and cognitive adjustment. The variables pertaining to psychosocial adjustment domain are: self-concept; depression, anxiety, and suicidal impulse; inclination of assault and indignation; delinquency; school life adjustment; and change in social relations. The variables of cognitive adjustment include recognition of self-control in learning; control strategy of learning behavior; and preparedness for job hunting. In this study the quasi-experimental group contained students from schools which are under the SPPREWI. The control group was composed of students from schools which were free from SPPREWI but under the influence of deteriorating school environment. The quasi-experimental group and the control group were compared in terms of outcome indicators presented earlier. Within the quasi-experimental group both the students below poverty-line and the students above poverty-line were divided into two groups each by the level of service use, and were compared in terms of the outcome variables presented earlier. Study results supported the argument that SPPREWI was effective generally in improving students' school adjustment. Study results also showed that the variable of 'school nurturance' played a significant role in moderating the effect of SPPREWI on a couple of outcome variables specially when schools' overall educational environment was in poor condition. Implication as well as suggestion were presented on the basis of study findings.

• Korean Journal of Optics and Photonics
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• 제20권2호
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• pp.128-133
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• 2009

In this paper, an optical touch panel device is newly proposed, with operating principle based on the optical coupling between a pointing pen having a built-in light source and perpendicularly crossed optical waveguide arrays. In order to enable an external light to couple into a waveguide core, the auxiliary pyramidal structures are introduced into all intersecting points located periodically along optical waveguides. The shape is optimized for minimizing the unwanted propagation loss due to the same structure by a ray tracing method. For the optical waveguide with the size of $50{\times}50{\mu}m^2$, the bottom width, height, and slope angle of the optimized pyramidal structure are $50{\mu}m$, $22.5{\mu}m$, and $42^{\circ}$, respectively. The optical coupling efficiency of about 97.8% and the average propagation loss of 0.3 dB/mm were achieved for the optimized touch panel. Finally, it is found from the tolerance analysis that tilting of the pen up to ${\pm}12^{\circ}$ can be allowed.

• Journal of the Korean Home Economics Association
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• 제43권8호
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• pp.141-159
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• 2005

The aim of this study was to investigate the current state of wife abuse in Seosan and the relationships between wife abuse and the related variables. A total of 132 couples took part in this study. All couples live in Seosan city, range in age from their 20s to 50s and each couple has at least one child. Stratification sampling method was used to select the couples. They were asked to complete self-report questionnaires. Subjects completed a Korean version of the self- esteem scale, marital conflict scale, communication style scale, family history of violence scale, alcohol dringking, and wife abuse scale. In order to examine the current state of wife abuse, such as, frequency, mean, standard deviation and paired t-test, t-test were calculated and analyzed. Next, to identify differences in wife abuse between the upper group and the lower group, t-test was peformed. Finally, to investigate the relative influences of independent variables upon wife-abuse, multiple regression analysis was peformed. All these analyses were conducted using SPSS 10.0 program. The results were as follows; 1) In terms of the current state of wife abuse, there are three main observations. First, $23\%$ of respondents answered that they had beat their spouse or been beaten by their spouse before and after their marriage. Second, compared with physical violence($2{\~}16\%$), other types of violence such as verbal($7{\~}4\%$), emotional($41{\~}64\%$), economical($3{\~}29\%$) and sexual violence($4{\~}38\%$) were reported to occur more often in these relationships. Third, following the abuse most wives tend to tolerate the situation instead of taking an active action like reporting the abuse to police. 2) As for the husbands, subjects that drank a high level of alcohol, blaming and super-reasonable communication style, and family history of violence reported more frequent cases of wife abuse. As for the wives, subjects with high levels of self-esteem, irrelevant communication style, marital conflict, and family history of violence reported having more cases of that abuse. 3) In the case of husbands, alcohol, communication style and family history of violence explained $40\%$ of wife abuse. In the case of wives, marital conflict and family history of violence explained $77\%$ of their experiences with abuse. This study makes the contribution to aims to develop education programs and family therapy relevant to prevent wife abuse and to reconsider the existing laws governing domestic violence in Korea.