• The Journal of the Korea Contents Association
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• v.22 no.8
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• pp.640-647
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• 2022

The purpose of this study was to investigate the factors influencing sleep quality of nursing students, focusing on depression, smartphone usage before sleep, and academic score. Among nursing students in the 3rd and 4th grades of two universities, 196 subjects were randomly selected. Data were collected from April to July 2021 using tool of sleep quality(PSQI-K), depression(Korean BDI-II), and smartphone usage before sleep, and the effect on sleep quality was analyzed through Stepwise Multiple Regression Analysis. As a result of the study, two factors, depression and smartphone usage before sleep, had 39.0% explanatory power for the sleep quality of nursing students, and were statistically significant. That is, the higher the depression level and the more frequent smartphone usage before sleep, the worse the sleep quality level. However, academic score was not a significant variable. In conclusion, in order to improve the sleep quality of nursing students, it is necessary to reduce the pattern of sleep disorders related to depression and to correct the lifestyle by reducing smartphone usage before sleep.

• Journal of Convergence for Information Technology
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• v.8 no.2
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• pp.121-131
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• 2018

The purpose of this study is to analyze whether the cosmetic interest of middle school female students(n=126) is related to purchase satisfaction by using purchase behavior and informatization level as control variables. Based on the research model, three hypotheses were set and statistical tests were conducted. The results of this study are as follows. First, middle school female students used cosmetics from elementary school and cosmetics education was requested from elementary school. Therefore proper early education on cosmetic use is needed. Second, the degree of interest and purchasing behavior of cosmetics was positively correlated with the purchase satisfaction of cosmetics. Third, the purchasing behavior of cosmetics was found to have a more effect on purchase satisfaction than the cosmetics interest. Especially, 'cosmetics purchase behavior' had a moderating effect on purchase satisfaction. Fourth, there was no difference in the average among the grades about cosmetics category(cosmetic interest, purchase behavior, informatization level, purchase satisfaction). This study needs to pay more attention to cosmetics purchasing behavior, which has the greatest effect on the satisfaction of cosmetics purchasing among middle school girls, and suggests that further studies will be continued to expand the range and ages in the future.

• Journal of the Korean Institute of Landscape Architecture
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• v.51 no.3
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• pp.122-138
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• 2023

Today, fishing villages are on the verge of extinction due to severe aging within the population and outward migration. Recent projects and studies targeting fishing villages viewed the fishing villages from an outsider-centered perspective, without a local-centered understanding of the village as a daily living space. Therefore, to understand the settlement environment of fishing villages, this study analyzed empirical data on the usage behavior of fishing village residents to gain insight into the characteristics of the outdoor space uses of residents in fishing villages. In this regard, a face-to-face survey was conducted among residents, and a village map drawn by the villagers showedthe spatial perception of the villagers. Empirical data on the behavior of fishing villagers using the village space was collected and analyzed through GPS. The study results suggested that residents of fishing villages tend to focus on productive activities, such as fishing, leading to a lack of awareness of other leisure activities and spaces. This monotonous pattern of space utilization within the village appears to stem from an absolute lack of available facilities within the target area. Therefore, in future village regeneration projects aimed at improving the quality of life for residents in fishing villages, it is essential to consider the residents' perception and utilization of space as a priority. The results of this study can be considered valuable foundational data for understanding the utilization of spaces within fishing villages and can be effectively utilized in planning initiatives to enhance quality of life.

• The Journal of The Korea Institute of Intelligent Transport Systems
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• v.22 no.5
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• pp.30-42
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• 2023

Various studies have been conducted using microtraffic simulation (VISSIM) to analyze the safety of traffic flow when introducing autonomous vehicles. However, no studies have analyzed traffic safety in mixed traffic while considering the driving behavior of general vehicles as a parameter in VISSIM. Therefore, the aim of this study was to optimize the input variables of VISSIM for non-autonomous vehicles through genetic algorithms to obtain realistic behavior. A traffic safety analysis was then performed according to the penetration rate of autonomous vehicles. In a 640 meter section of US highway I-101, the number of conflicts was analyzed when the trailing vehicle was a non-autonomous vehicle. The total number of conflicts increased until the proportion of autonomous vehicles exceeded 20%, and the number of conflicts decreased continuously after exceeding 20%. The number of conflicts between non-autonomous vehicles and autonomous vehicles increased with proportions of autonomous vehicles of up to 60%. However, there was a limitation in that the driving behavior of autonomous vehicles was based on the results of the literature and did not represent actual driving behavior. Therefore, for a more accurate analysis, future studies should reflect the actual driving behavior of autonomous vehicles.

• Journal of Korean Society of Transportation
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• v.27 no.2
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• pp.169-178
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• 2009

This study is aimed at identifying the association of commuting behavior with health for workers in the Korea Capital Region. The study surveyed a total of 1,285 commuters whose major work is deskwork-oriented; the authors obtained their health status on body form, blood pressure and cholesterol as well as their commuting behavior. The measures of the latter were comprised of a main commuting mode, a use term, out-of-vehicle time, total travel time, transit transfer, and alternative mode in order to identify the amount of physical activity obtained through commuting behavior. The results indicate that non-automobile commuters are positively associated to improve their health status, as compared to car commuters. Specifically, bus commuters and walkers had decreased weight, blood pressure, and cholesterol, while rail commuters are only correlated to relieving cholesterol. In addition, the measures for health are improved as out-of-vehicle time increases. For commuters who drive to work, their health status tends to be worse.

• Journal of Korean Library and Information Science Society
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• v.46 no.4
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• pp.161-190
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• 2015

The purpose of the study is to explore how isolated immigrant adolescents seek and use necessary information when they are unable to use significant information sources-their peer groups-in the period of transition before new peer groups are established. Sixteen recently arrived Korean immigrant adolescents were recruited and a mixed method including surveys and in-depth interviews was used through three research phases. This study gained a preliminary understanding of isolated immigrant adolescents' information world: how they interpret their current situations and daily hassles, seek (or do not seek), and utilize information to cope with their daily life problems, and evaluate their use of information, including library systems and interpersonal sources. Five main emergent themes were analyzed from the findings and pertinent theories/models to interpret these unique features were suggested and discussed. The contribution and limitation of the study and future study are suggested and discussed.

• Industry Promotion Research
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• v.9 no.3
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• pp.193-203
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• 2024

This study analyzes user behavior on YouTube Shorts within snack culture and proposes short-form video production strategies by identifying key value factors. Prior research identified seven characteristics (playfulness, time killing, information provision, social presence, interactivity, escapism, conciseness) and criteria based on the 5W1H principles. Surveys and interviews revealed that key user values are playfulness, time killing, conciseness, and interactivity. Users engage without specific purposes, watch 10-20 consecutive pieces selectively, and use it in comfortable environments. This research provides insights for understanding user behavior and short-form video production strategies.

• The Journal of the Korea Contents Association
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• v.15 no.7
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• pp.511-519
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• 2015

We present an in-depth analysis on the factors that influence viewing satisfaction and behavior of visitors in the exhibition. The proposed method consists of two steps including, i) classification of factors into demographic and social, psychological, cultural through surveys and ii) analysis the impact of viewing satisfaction and behavior on the characteristics of visitors. The proposed method can find the characteristics of each factor from the general audience, and can be used in planning and the exhibition in the form of an organized database in the future.

• Journal of Korean Society of Transportation
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• v.20 no.5
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• pp.183-191
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• 2002

본 논문은 ATIS의 효과를 평가할 수 있도록 교통정보제공에 따른 운전자의 노선선택 행태자료를 수집할 수 있는 시뮬레이터 개발에 관한 것이다. 현재 이러한 행태자료를 수집하기 위해서 설문지에 의한 SP(Stated Preference) 설문조사가 널리 수행되어지고 있으나 이러한 설문조사방법은 ATIS와 같은 가상의 환경을 응답자에게 이해시킬 수 있는 설문지를 작성하기가 힘들고, 무엇보다 운전중에 느끼게 되는 time pressure를 현실적으로 반영하지 못하기 때문에 신뢰성있는 자료를 수집하는데 어려움이 있다. 시뮬레이터는 보다 현실적인 교통상황을 계산하고 적절한 인터페이스 구성을 통해 교통상황과 분석자의 설문 의도를 응답자에게 효과적으로 인지시킬 수 있다는 장점을 가지고 있다. 본 연구에서 세 가지 모듈(교통 시뮬레이션 모듈, 데이터베이스 모듈, 이용자 인터페이스 모듈)로 구성된 프로토타입 시뮬레이터를 개발하였다. 개발된 프로토타입의 유용성을 알아보기 위해 실제로 실시간 교통정보가 제공되는 작은 네트워크를 대상으로 파일럿 테스트를 수행하였고, 수집된 자료는 discrete choice model을 정산하는데 사용하였으며 그 분석결과는 상당히 합리적인 것으로 나타났다. 따라서, 이러한 시뮬레이터는 교통정보전략에 따른 효과를 사전에 분석해보고, 효과적인 교통정보시스템을 설계 및 운영하는데 활용될 수 있을 것이다.

• Journal of Information Technology Application
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• v.1 no.3_4
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• pp.133-152
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• 1999

생산 시스템은 일반적으로 규모가 크고 복잡하며 동시 발생적인 특성을 가지는 경우가 많다. 이러한 특징은 시스템의 행태를 사전에 분석하고 시뮬레이션하기 위한 모델링에 많은 어려움을 가져오게 한다. 본 논문은 이러한 어려움을 해결하기 위하여 객체지향 페트리네트를 이용한 생산시스템 모델링 및 분석 도구를 제사한 것이다. 기본적인 구조는 페트리네트를 객체의 개념으로 구성하는 것이다. 객체의 개념으로 페트리네트를 구성하고 시스템의 행태는 객체간의 메시지 교환과 객체내의 행태로 표현된다. 시스템 분석에 있어서는 객체간의 메시지 전달관계와 객체내의 행태 분석 등이 가능하다. 대상 시스템이 객체의 클래스 개념으로 구성되기 때문에 복잡도가 많이 감소될 수 있다. 특히 본 논문에서는 상속성의 개념을 객체 지향 페트리네트에서 어떻게 구현할 것인가에 대한 방법과 분석 방법이 제시되었다.