• 가정과삶의질연구
• /
• 제32권1호
• /
• pp.63-79
• /
• 2014

Recently, in our society, the use of smartphones has been widespread and changed our lives positively; however, the excessive use of smartphones has also produced many side effects. In particular, we can see that the reckless use of smartphones has constantly increased smartphone addiction propensities. University students, too, show smartphone addiction propensities more and more gradually; therefore this study intends to perform research related with smartphone addiction propensities with university students as the subjects. Since it is more and more important to perform leisure activities to prevent smartphone addiction and reduce addiction propensities, it can be said that the research on the correlation between leisure activities and smartphone addiction propensities is significant. The major findings of the research are as follows: First, among the smartphone addiction propensities, their tolerance and disturbance of adaptive function were relatively higher than other factors. Second, overall smartphone addiction affects the variables of gender (male), school year (freshmen), economic leisure constraints, time leisure constraints, and the adequacy of travel behavior, sports behavior, media use behavior, reading behavior, volunteer work and religious behavior. The adequacy of the media use behavior variables showed the greatest impact.

• Journal of Biosystems Engineering
• /
• 제39권3호
• /
• pp.194-204
• /
• 2014

Purpose: The aim of this study was to develop long-term storage technology for Chinese cabbage in order to extend the period of availability of freshly harvested products. The scope of the paper deals with the use of a cooler with a remote monitoring and control interface in conjunction with use of packaging film. Methods: A cooler with a real time monitoring system was designed as a low-temperature storage facility to control temperature and relative humidity (RH). The effects of storage in high-density polyethylene (HDPE) plastic boxes, 3% chitosan dipping solution, polypropylene film (PEF) with perforations, and mesh packaging bags on physiological responses were investigated. The optimal storage temperature and humidity for 120 days were below $0.5^{\circ}C$ and 90%, respectively. Physiological and biochemical features of cabbage quality were also analyzed: weight loss, texture, and sugar salinity, chlorophyll, reducing sugar, and vitamin C contents. Results: The cooler with a remote monitoring and control interface could be operated by an HMI program. A $0.5^{\circ}C$ temperature and 90% humidity could be remotely controlled within the cooler for 120 days. Postharvest freshness of Chinese cabbages could be maintained up to 120 days depending on the packaging method and operation of the remote monitoring system. In particular, wrapping the cabbages in PEF with perforations resulted in a less than a 5% deterioration in quality. This study provides evidence for efficient performance of plastic films in minimizing post-harvest deterioration and maintaining overall quality of cabbages stored under precise low-temperature conditions with remote monitoring and a control interface. Conclusions: Packaging with a modified plastic film and storage in a precisely controlled cooler with a remote monitoring and control interface could slow down the physiological factors that cause adverse quality changes and thereby increase the shelf life of Chinese cabbage.

• Journal of Ecology and Environment
• /
• 제41권12호
• /
• pp.345-350
• /
• 2017

Background: Ecological research often requires monitoring of a specific individual over an extended period of time. To enable non-invasive re-identification, consistent external marking is required. Treefrogs possess lateral lines for crypticity. While these patterns decrease predator detection, they also are individual specific patterns. In this study, we tested the use of lateral lines in captive and wild populations of Dryophytes japonicus as natural markers for individual identification. For the purpose of the study, the results of visual and software assisted identifications were compared. Results: In normalized laboratory conditions, a visual individual identification method resulted in a 0.00 rate of false-negative identification (RFNI) and a 0.0068 rate of false-positive identification (RFPI), whereas Wild-ID resulted in RFNI = 0.25 and RFNI = 0.00. In the wild, female and male data sets were tested. For both data sets, visual identification resulted in RFNI and RFPI of 0.00, whereas the RFNI was 1.0 and RFPI was 0.00 with Wild-ID. Wild-ID did not perform as well as visual identification methods and had low scores for matching photographs. The matching scores were significantly correlated with the continuity of the type of camera used in the field. Conclusions: We provide clear methodological guidelines for photographic identification of D. japonicus using their lateral lines. We also recommend the use of Wild-ID as a supplemental tool rather the principal identification method when analyzing large datasets.

• 보건의료산업학회지
• /
• 제7권2호
• /
• pp.23-35
• /
• 2013

A study of the factors influencing the quality of life and social support of people suffering with mental disabilities, who use mental health centers. The purpose of the study includes the general characteristics of subjects, characteristics of the mental health center, the mean score of social support and quality of life of people living with mental disabilities. The 132 questionnaires were administered by meeting directly with subjects and personal visits. 112 Questionnaires were returned(85% response rate). Data was collected from mentally disabled patients in Chungnam Mental Health Center. difference in quality of life by using t-test, one way ANOVA table, the relationship between social support, quality of life by pearson correlation coefficients, and relevant factors affecting quality of life by multiple regression with the SPSS 19.0 program. This study revealed that the group that participated regularly in the day time rehabilitation program showed better social support and positive attitude to a better quality of life than the other group that participated irregularly. This result is directly proportional to the participation frequency to the program during the recent 3-month duration. Another correlation with religion was found in the study due to the fact that a buddhist group showed positive significance in quality of life than non-religious groups. The results show positive correlation between the improvement of the quality of life of patients living with mental disabilities and the social support they receive.

• 한국실내디자인학회논문집
• /
• 제13호
• /
• pp.231-237
• /
• 1997

One of the clearest reactions against Modern architecture, and its planning ideology of comprechensive development, was the neo-Regional movement which arose at more or less the same time in serval countries. In the mid-fifties architects in Mexico started to design architectures which mixed vermacular and Modern methodology to recall traditional buildings. This popular alternative to Modernism had caught on in Mexico by the recent to become the accepted approach for the most regional building built by the Mexican architects. The regional architecture provided the continual activity, safety and economy of traditional life which was lacking in so many Modern building, while the these ages provided a cultural continuity. Anonymity of craftsmanship, but personalization of each building; enclosed wall of strong color, wide inward opening, but flat roof; emotional layouts and poetic outdoor water space, but variable massing; as it the buildings had been constructed over several years-these were the contradictory signs of neo-Regionalism. The Regional architecture has direct reference to human inhabitation and use, and it embraces mystery, poetic sense, a quality we are losing in Modern life. There is a freedom from rules, which shows up especially in an insouciant use of color, just for fuv.

• 한국정밀공학회:학술대회논문집
• /
• 한국정밀공학회 2001년도 춘계학술대회 논문집
• /
• pp.373-376
• /
• 2001

In this paper to cope with the reduction of products life-cycle as the variety of products along with the various demands of consumers, a virtual simulator is developed to make the changeover of manufacturing line efficient to embody a virtual simulation similar to a real manufacturing line. The developed virtual simulator can design a layout of a factory and make the time scheduling. Every factory has one simulator so that one product can be manufactured in the factories to use them as virtual factories. We suggest a scheme that heightens the ability to the diversity of manufacturing models by making the information of manufacturing lines and products models to be shared. The developed system embodies a virtual manufacturing line on the simulation using various manipulators and work cells as manufacturing components. we develop a virtual simulator system on Window 98/NT environment of Microsoft, operating system using of the greater part of PC user. Window program have a merit making GUI environment that programmer can use without the expert knowledge about hardware. A suer with the simulator can utilize an interface that makes one to manage the separate task process for each manufacturing module, change operator components and work cells, and easily teach tasks of each task module.

• Journal of Electrochemical Science and Technology
• /
• 제9권3호
• /
• pp.184-194
• /
• 2018

In this paper, we propose a rapid-charging system for the lithium-ion battery (LIB) packs used in electric forklifts. The battery offers three benefits: reduced charge time, prolonged battery life, and increased charging efficiency. A rapid-charging algorithm and DC/DC converter topology are proposed to achieve these benefits. This algorithm is developed using an electrochemical model, which controls the maximum charging current limit depending on the cell voltage and temperature. The experimental use of a selected 18650 LIB cell verified the prolongation of battery life on use of the algorithm. The proposed converter offers the same topological merits as a conventional resonant converter but solves the light-load regulation problem of conventional resonant converters by adopting pulse-width modulation. A 6.6-kW converter and charging algorithm were used with a forklift battery pack to verify this method's operational principles and advantages.

• 한국토양비료학회지
• /
• 제41권1호
• /
• pp.50-54
• /
• 2008

근적외선스펙트로메타는 토양의 성분을 측정하는 새로운 기술로 발전하고 있다. 작물이 요구하는 토양의 인산 함량을 측정하는 데는 시간이 많이 소요되며, 침출액과 침출조건에 따라서 다르기 때문에 어려운 성분이다. 그러나 근적외선 방법을 이용하여 표준곡선을 정확하게만 만들어, 표준곡선 작성 시 Wiliams의 상관계수안내를 이용하면 상관계수의 수치에 따라서 토양의 총인산과 유효인산을 측정하는데 간편하게 이용할 수 있다. 또한 근적외 기술은 정밀도를 향상하면 포장 현지에서의 토양검정에도 쉽게 이용할 수 있는 쉬운 기술로 생각된다.

• 가정과삶의질연구
• /
• 제21권3호
• /
• pp.123-131
• /
• 2003

The potential of information and communication technologies has already had a profound impact on many ways of our living and society. To catch up with this trend, Korean government has demonstrated the vision for informatization called‘Cyber Korea 21'/'e-Korea’project and has fully supported the education for informatization which is one of the key factors to reduce the digital divide. But, In spite of developing a variety of training programs with different target groups and policy objectives, a digital divide remains in some cases even while Internet access and computer ownership are rising rapidly for almost all groups. For example, the noticeable divides still exists between men and women. To accelerate the process of women informatization, which we believe to be major contributors for the high quality of life for women, we need to promote full-time housewives to become aggressive information users and producers. Internet shopping, for example, might be a good starting point for motivating women to become active information users. In this paper, we present a model for explaining the factors affecting the degree of satisfaction of housewives from internet shopping. Based on data collected from a questionnaire survey from housewives in Seoul, we conclude that the perceived usefulness, ease of use and the playfulness significantly affect the level of satisfaction, but the playfulness does not directly affect the intention to revisit and purchase. In addition, we found out that the perceived usefulness is affected by efficiency, attitude and easy to access. We also provide other interesting statistical results and implications.

• 대한지역사회작업치료학회지
• /
• 제9권3호
• /
• pp.21-30
• /
• 2019

목 적 : 본 연구는 작업 균형(Occupational Balance)과 성공적인 노화연구(Well Elderly Research Study)를 이론적 근거로 라이프스타일 재설계 프로그램을 적용하여 뇌졸중 노인의 시간 사용과 삶의 질에 미치는 효과를 확인하고자 하였다. 연구방법 : 요양병원에 거주하는 뇌졸중 노인 총 40명(실험군 20명, 대조군 20명)을 대상으로 통제집단 사전사후검사 설계(pretest-posttest control group design)를 시행하였다. 라이프스타일 재설계 프로그램에 참여하기 전 2주 동안 사전평가를 실시하였고, 이 후 10주 동안 주 7회 라이프스타일 재설계 프로그램을 적용하였으며, 이 후 1주 동안은 사후 평가를 실시하였다. 대상자의 시간 사용은 통계청(2009) 생활시간 조사표를 사용하였고, 삶의 질의 경우 세계보건기구 삶의 질 평가도구(WHOQOL-BREF)를 사용하였다. 결과 : 프로그램 적용 전과 후의 시간 사용량 비교 결과 실험군의 경우 휴식과 수면(t=-4.89, p<.001), 여가(t=-4.67, p<.001)에서 통계적으로 유의한 차이를 확인할 수 있었다. 또한 집단 간 비교 결과 역시 휴식과 수면(t=-2.24, p<.01) 그리고 여가(t=3.57, p<.01)에서 통계적으로 유의한 차이가 나타났다. 삶의 질 비교 결과 두 그룹 간 통계적으로 유의한 차이가 나타났다(t=6.80, p<.001). 삶의 질 하위영역을 살펴보면 신체적 건강영역(t=6.08, p<.001), 심리적 건강영역(t=5.21, p<.001), 생활 환경영역(t=3.60, p<.01)에서 통계적으로 유의한 차이를 확인할 수 있었다. 결론 : 라이프스타일 재설계 프로그램은 요양병원에 거주하는 뇌졸중 노인의 휴식과 수면의 시간 사용은 줄이고, 여가생활에 참여하는 시간 사용을 늘려주었으며, 그로 인해 삶의 질이 향상되는 결과를 나타내었다.