• Journal of the Korean Society of Industry Convergence
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• v.26 no.6_2
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• pp.1083-1095
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• 2023

Recently, the demand for low-voltage, high-capacity ESS is rapidly increasing due to the revitalization of the e-mobility industry, which is mainly powered by electricity. In addition, the demand for portable power banks is rapidly increasing due to the revitalization of leisure industries such as camping and fishing. The ESS with this structure consists of a small number of series cells and many parallel cells, resulting in a system with a large rated current. Therefore, the number of power devices for cell balancing configured in series is small, but a balancing device with a large current capacity is required. Construction of a constant temperature device in such a low-voltage, high-current ESS is difficult due to economic issues. The demand for an active balancing system that can solve the passive balancing heating problem is rapidly increasing. In this paper, propose a power feedback fly-back topology that can solve the balancing heating problem. The characteristic of the proposed topology is that a series-connected voltage sharing voltage is used as the input of the flyback converter, and the converter output is connected to one transformer. In this structure, the converter output for cell voltage balancing shares magnetic flux through one high-frequency transformer, so the cell voltage connected to the converter automatically converges to the same voltage.

• Korean Journal of Environment and Ecology
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• v.30 no.1
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• pp.118-129
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• 2016

The purpose of this study was to offer the preliminary data for the development of forest therapy program. This exploratory study is about the development of forest healing program by identifying what is the forest healing program preferences of potential consumers and would be an important basis for the operation. The survey of interests and needs of 620 people on the forest therapy was analyzed. Using SPSS 21.0 program, statistical analysis, frequency analysis, T-test, One-way ANOVA, we looked at the differences in forest healing program preferences according to gender, age, occupation. Forest therapy program preference was found to vary depending on sex, age and job. First, according to gender, men preferred athletic in the forest and camping compared to women, and women showed a higher preference than men in the overall program. Second, depending on age, as compared to other age, for 20s; stress assessment & diagnosis, cooking in the forest, photo therapy in the forest, for 30s; walking in the forest, counseling, listening to lectures(stress-related or interpersonal relationships-related), communication-related lectures and vision quest, for 40s; meditation, viewing the forest, forest bathing wind bathing sun bathing, walking on barefoot in the forest, for 50s; breathing breathing exercises, yoga, mountaineering, climbing in silence, eating wild food, respectively, each of those programs were especially favored. Third, the forest healing program preference in accordance with the job is as follows. For students; stress assessment & diagnosis, cooking in the forest, etc., for teachers; walking in the forest, mountaineering, reading in the forest, viewing the forest, forest bathing wind bathing sun bathing, camping etc., for housewives; yoga, listening to the sound of water flowing, drinking herbal tea, eating wild food, for specialist researcher; breathing breathing exercises, climbing in silence, meditation, sleeping in the forest, respectively, each of those programs were especially favored. We expect the results of this study to be utilized as basic data for the development of forest therapy program targeting on adults.

• Journal of the Korean Institute of Landscape Architecture
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• v.16 no.2
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• pp.43-57
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• 1988

The purpose of this thesis is to suggest objective basic data for park management proposal through the quantitative analysis of users' behaviors and satisfaction for the actual conditions of management in the Chiri Mountain National Park. For this users' behaviors and socio-economic characteristics have been cross-analyzed. Specifically, it attempts to investigate users' anticipate and degree of satisfaction applied Expectancy Theory by Likert attitude scale. Users'behaviors patterns of each site have been analyzed by the factor analysis algorithm, and each factor scores of sites have been clustered by the cluster method. And also user' satisfaction for the actual conditions of management have been analyzed by using the multiple regression. The major user groups were students and youth groups accompanied by their friends ranging from 3 to 10. The values of user'post occupancy-evaluation for such as rockwall climbing and praying on the mountain of each site showed higher than those of anticipated, but evaluation values of other activities were lower. The user'behaviors of each site have been analyzed five factors by factor analysis algorithm. By using the control method for the number of factors, T.V. has been obtained as 50.58%. The factor score of factor covering the behavior patterns of student and youth yield high EV. and C.V.. On the analysis of cluster using factor score, factor IV in Hwaomsa temple site and Ssanggyesa temple site, factor II, v in Jungsanri Valley site, factor, I, III in Bangmudong valley site and factor I. IV in Baemsagol vallry site showed very high values, respectively. According to the multiple regression analysis, the major variables related to the satisfaction for the actual conditions of vegetation and landscape managements were reservation of groundcover, recovery of artificial injury, the surroundings of camping and temple site. In the park facilities and operation, the major variables related to the satisfaction were conditions of management such amenity facilities as privy, sign board, junk yard, camping site, and guidance of excursion, campaign and preservation of nature.

• Journal of Korean Society of Forest Science
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• v.104 no.1
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• pp.150-161
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• 2015

The purpose of this study was to obtain the basic data for the effective development and operation of forest healing by analysing the preference of adults on the forest therapy program. The survey of 516 normal adults on the forest therapy program was conducted. Using SPSS 21.0 Program, data analysis of descriptive statistics and correlation analysis of each program confirmed number of covariate, and so we conducted a factor analysis to short meaningful data. And then we looked at the forest healing program preference difference according to demographic characteristics(sex, age, residence, occupation) through reliability analysis, frequency analysis, T-test, analysis of variance(ANOVA). Facter analysis was performed by use of the VariMax orthogonal rotation factor analysis to abbreviate 37 forest therapy program. Through this, the program has been reduced such as 7 program group(1: psychology-based treatment, 2: teaching and counselling-based treatment, 3: camping and forest bath-based treatment, 4: diet-based treatment, 5: nature and plant-based treatment, 6: meditation-based treatment, 7: respiration and yoga-based treatment) and 7 independent programs(1: sleeping in the forest, 2: vision quest, 3: soaking in water, 4: walking wearing shoes, 5: viewing the forest, 6: mountaineering, 7: athletics in the forest). With this criterion, the forest therapy program difference in accordance with sex, age, residence, occupation has been investigated. First, it was verified that there was a significant difference between male and female in the group of such as psychology-based treatment, diet-based treatment, mountaineering. Second, there appeared a significant difference in groups such as teaching and counselling-based treatment, camping and forest bath-based treatment, nature and plant-based treatment, respiration and yoga-based treatment, athletics in the forest. Third, according to the residence, there appeared a significant difference in groups such as psychology-based treatment, teaching and counselling-based treatment, diet-based treatment, nature and plant-based treatment, meditation-based treatment, vision quest, mountaineering, athletics in the forest. Fourth, according to the occupation, there appeared a significant difference in groups such as nature and plant-based treatment, medication-based treatment, vision quest, walking wearing shoes, viewing the forest, mountaineering. As shown before, it seems to be necessary that we should be mindful of this investigation which shows variety of preference of adults on the forest therapy program according to demographic characteristics. We expect the results of this study to be utilized as basic data for the development of forest therapy program targeting on adults.

• Journal of Korean Society of Forest Science
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• v.81 no.3
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• pp.203-213
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• 1992

The purpose of this study is to segment recreationists into groups which are homogeneous with respect to their spending patterns and trip characteristics. Date were derived from a larger study aimed at developing nationally representative expenditure profiles for recreation visitors to Corps of Engineers projects. Segmentation of these data reduces variance and helps to identify distinctive final demand vectors for input - output application. A - priori and cluster analysis approaches for identifying segments are compared. The a - priori segmentation approach identified 12 segments and the cluster analysis approach identified 3 segments. The 3 nonresident clusters - labeled "day use", "overnight", and "overnight camping" - show lower mean squares within groups than the a - priori segments on almost all nonresident spending categories with an exception of boating expenses. For the Corps of Engineers, implications of these findings for the estimation of economic impacts are discussed.

• Korean Journal of Environmental Biology
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• v.37 no.4
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• pp.600-606
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• 2019

The study site was the camping area in the Hwarang Amusement Park in Danwon-gu, Ansan-si. Study activities were conducted three times a week from July 20, 2018, to August 1, 2018. A control site, natural enemy site, and Bti(Bacillus thuringiensis israelensis) site were selected. The analyses included habitat environment and species composition analyses, community analysis, correlation analysis, and similarity analysis. The water quality analysis found no significant difference in water quality over the study period (p>0.05). A total of 4,818 individuals, 38 species, 22 families, and 11 orders were observed during the study period. The natural enemy site observed during the study period had a similar species composition as the control site. The Bti site differed from other sites by the low number of species and individuals present. According to the community analysis, the natural enemy site was a stable community and the Bti site was an unstable community during the study period. Diptera showed negative associations with temperature and water temperature and mosquito larvae showed significant correlations with temperature and water temperature. The similarity analysis showed that the control site and the natural enemy site were 61.11-73.68% and the Bti site showed 30.77-56.00% similarity.

• Korean Journal of Health Education and Promotion
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• v.14 no.2
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• pp.59-68
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• 1997

당뇨병은 고혈당을 조절 안할 경우에는 돌이킬 수 없는 신체적 합병증은 물론 정신적 손상까지 받지만, 고혈당은 노력만 하면 조절이 가능하며, 정상에 가까울 정도로 조절되면 정상인과 같은 삶을 영위할 수 있다. 그러나 보건의료 전문가의 인슐린 주사 요법, 식사 및 운동요법 등의 일방적인 처방만으로 성공적인 당조절을 기대하기에는 어려움이 있다. 그래서 당뇨병 환자에게 당뇨병이라는 것이 무엇이며, 어떻게 이 병을 스스로 조절할 수 있게 만드느냐가 더욱 중요한 것이다. 따라서 우리나라에서도 당뇨병에 대한 관심이 높아짐에 따라 각 지역과 의료기관마다 다양한 당뇨병 교육 프로그램이 실시되고 있다. 특히 소아 당뇨병 환자는 이러한 전통적인 당뇨병에 관한 교육을 통해서 당뇨병에 관한 지식은 많이 가지고 있지만, 당뇨병 자가 조절을 위한 환자 역할 행위(sick-role behavior)를 변화시키는데는 그다지 성공절이라 할 수 없다. Bandura(1977)는 자기 효능은 ‘할 수 있다는 자신감’으로 수행 성취, 대리 경험, 언어적 설득, 정서적 각성에 관한 정보에 의해 결정된다고 하였다. 따라서 이러한 정보들은 자기 효능을 증진시키기 위한 중재의 방향을 제시해 준다. 오늘날 이러한 정보를 활용한 중재 프로그램 중에서 가정과 학교를 떠나 자연 환경 속에서의 집단 활동을 통하여 사회 학습 경험을 하는 캠프 프로그램에 대한 관심이 높아지고 있다. 캠프에 참여한 당뇨병 아이들은 캠프 활동속에서 다른 동료 아이들이 자신이 갖고 있는 문제들을 성공적으로 해결해 나가는 것을 관찰하여 대리 경험하게 될 때 희망을 가지게 되며, 당뇨병을 가진 다른 동료들과 공통의 경험을 공유할 수 있는 기회를 갖게 되어 그들은 자신이 더 이상 혼자가 아니며 남과 ‘다르지’도 않다는 것을 깨닫게 되어 점차 자신감을 가지고 살아갈 수 있게 된다. 본 연구는 캠프 프로그램이 소아 당뇨병의 자기 효능을 증진시키고, 당뇨병 환자 역할 행위 이행 정도를 높여주는지를 규명해 봄으로써, 소아 당뇨병 환자를 위한 효과적인 간호 중재 방안을 제시하고자 비동등성 대조군 전후 실험 설계의 유사 실험 연구를 시도하였다. 1996년 8월 10일 부터 12월 12일까지 종합병원에서 추후 관리하고 있는 소아 당뇨병 환자중 선정 기준에 맞는 환자 41명을 연구대상으로 하였으며, 그 중 19명은 실험군으로 Bandura의 자기 효능 증진을 위한 정보원을 활용한 캠프 프로그램을 5박 6일간에 걸쳐 실시하였고, 다음 22명은 대조군으로 캠프 프로그램을 실시하지 않았다. 자료수집은 자기 효능 척도와 환자 행위 역할 이행 척도를 캠프 프로그램을 실시하기 전에 사전 조사를 하고 중재 후 4주째 사후 조사를 하였다. 수집된 자료는 SPSS/PC+로 Chi-square test, t-test, ANCOVA, Pearson correlation을 이용하여 분석하였으며, 그 결과는 다음과 같다. 캠프 프로그램은 소아 당뇨병 환자의 자기 효능을 증진시키고 환자 역할 행위 이행을 높여주는데 효과적 이었다. 소아 당뇨병 환자의 자기 효능은 환자 역할 행위 이행과 순 상관 관계가 있어, 자기 효능이 증진될수록 환자 역할 행위 이행 정도가 높아졌다.

• Journal of Navigation and Port Research
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• v.39 no.6
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• pp.529-538
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• 2015

This paper was intended to empirically identify problems with recreational sea fishing park facilities installed to help reinvigorate local economy of fishing villages in order to mitigate shortage of fishing facilities amid an increase in sea fishers and spur evolution of sea fishing into a marine leisure activity, on which basis this researcher presented direction for facility planning which is deemed necessary to map out the plan for sea fishing parks, along with measures designed to improve sea fishing park facilities. To analyze the problems related to sea fishing park facilities, we conducted a survey on facility operations involving 9 sea fishing parks and 2 sea ranches and had an investigative interview with facility manager. Moreover, a survey was conducted of fishers in 25 sea fishing places, including sea fishing park, fishing experience village, etc., in order to investigate their demand for facilities. The results of survey suggested that there was a significant demand for expansion of amenities such as safety facilities, toilets, lounge facilities, etc., which can accommodate the increase in the number of people fishing with family. Furthermore, the results showed that there was a huge demand for introduction of facilities aiding leisure activities in addition to facilities for fishing activities including education facilities such as fishing site at the corner exclusive for beginners, experiential facilities, camping site, seaside park, promenade, etc. Thus, sea fishing park should be the complex leisure space with a focus on fishing activities and requires facility configuration and facility planning suited to activity requirements within fishing park.

• Proceedings of the Korea Water Resources Association Conference
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• 2019.05a
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• pp.294-294
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• 2019

The system for predicting flood of river at Flood Control Office is made up of a rainfall-runoff model and FLDWAV model. This system is mainly operating to predict the excess of the flood watch or warning level at flood forecast points. As the demand for information of the management and operation of riverside, which is being used as a waterfront area such as parks, camping sites, and bike paths, high-level forecasts of watch and warning at certain points are required as well as production of lowland flood forecast information that is used as a waterfront within the river. In this study, a technology to produce flood forecast information in lowland areas of the river used as a waterfront was developed. Based on the results of the 1D hydraulic analysis, a model for performing spatial operations based on high resolution grid was constructed. A model was constructed for Andong district, and the inundation conditions and level were analyzed through a virtual outflow scenarios of Andong and Imha Dam.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.20 no.2
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• pp.443-450
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• 2019

We studied to find the optimal manufacturing conditions of coffee grounds sludge RDF with oil drying method. We expanded the lab scale to pilot scale to compare the efficiency of the oil-drying equipment and The selection of the ratio of coffee grounds and oil, the setting temperature, and the temperature change and water content with time were measured. In order to analyze the characteristics of the research results, characteristics of solid fuels produced(Coffee grounds of oil-dried) by calorimeter, TGA, combustion equipment, and combustion gas measuring instrument were analyzed. As a result, the ratio of oil to coffee grounds was 4: 1, and when the setting temperature was set to $300^{\circ}C$, the water content reached 10wt.% or less within 20 minutes. ln addition, it showed high calorific value of 6,273kcal/kg. However, coffee grounds had a similar composition to wood and showed high luminance and produced a lot of CO in combustion gas. As a result, it is considered to be unsuitable for thermoelectric power plant and camping fuel, but the initial ignition speed is high and the heat generation is high, so it is considered that it can replace the fuels for current use.