• Journal of the Korean Society for Aeronautical & Space Sciences
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• v.50 no.4
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• pp.287-295
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• 2022

As low altitude long-range artillery threat has been strengthened, the development of anti-artillery interception system to protect assets against its attacks will be kicked off. We view the defense of long-range artillery attacks as a typical dynamic weapon target assignment (DWTA) problem. DWTA is a sequential decision process in which decision making under future uncertain attacks affects the subsequent decision processes and its results. These are typical characteristics of Markov decision process (MDP) model. We formulate the problem as a MDP model to examine the assignment policy for the defender. The proximity of the capital of South Korea to North Korea border limits the computation time for its solution to a few second. Within the allowed time interval, it is impossible to compute the exact optimal solution. We apply approximate dynamic programming (ADP) approach to check if ADP approach solve the MDP model within processing time limit. We employ Shoot-Shoot-Look policy as a baseline strategy and compare it with ADP approach for three scenarios. Simulation results show that ADP approach provide better solution than the baseline strategy.

• Parasites, Hosts and Diseases
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• v.36 no.4
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• pp.235-239
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• 1998

Microfilarial periodicity of Dirofilaria immitis (the dog heartworm) was determined at two hr intervals for 72 consecutive hrs in 10 naturally infected war dogs, 3-9 years old, in Korea to facilitate harvest of the microfilariae for possible use in laboratory works and to elucidate further the periodicity of the microfilaria depending on geographic location, Although the periodicity had been observed as being lowgrade nocturnal, maximal microfilarial counts were found at 21 :00 hr and minimal at 11 :00 hr, giving rise to an evident peak in fluctuation of the larval counts. This is the first record of the periodicity of the microfilariae identified as D. immitis in Korea.

• Agrochemical news magazine
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• v.21 no.8 s.161
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• pp.22-25
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• 2000

• Journal of the Korea Academia-Industrial cooperation Society
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• v.21 no.12
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• pp.162-169
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• 2020

This study was conducted from November 25 to December 4, 2019, to unmask differences in physical fitness based on the weight class of high school Ssirum elite-players. A total of 28 high school Ssirum elite-players were compared and analyzed by measuring physical factors (muscle strength/power, agility, anaerobic power, aerobic ability, flexibility, and isokinetic muscle function) by weight class. Data were analyzed using SPSS ver. 23.0. One-way ANOVA was used for comparison between groups. There was no difference by weight class in terms of grip strength, sit-ups, sergeant jump, long jump, flexibility, side step, and reaction time. Evaluation of back muscle strength revealed that the group with more than 100 kg had greater strength than lower weight categories, whereas it was lower in the sit-ups, 20 m shuttle run and the relative values anaerobic power. Considering isokinetic muscle function, no difference was observed between the groups of back muscle strength and knee joint. The results of this study indicate that amongst the high school Ssirum elite-players, there is no difference in muscle power, flexibility, agility, and anaerobic average power per body weight, isokinetic trunk strength, and knee flexion strength, when evaluated according to weight class.

• Journal of the Korea Convergence Society
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• v.10 no.5
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• pp.249-256
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• 2019

This study started from the question of what is the perception of high school students' college of management, 'business school', which is the demand of university education. Especially, for the analysis, the Q methodology was used to typify the recognition. 30 high school students classified 30 selected Q-statements into 9points standard. As a result of analysis, three types were defined. emphasized 'overall management', 'business', and 'money management'. So, we called "Type of Overall Business Interest". emphasized 'money management' 'Member Management'. So, we called "Type of Management Money and Member". And emphasized 'business', 'marketing' and 'sales'. So, we called "Type of Business Recognition". In addition, we found a hypothesis that high school students' perception of the business line would be different according to the characteristics of the respondents.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.13 no.3
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• pp.1194-1202
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• 2012

Adiponectin and Gut hormones(insulin, glucagon, ghrelin, PYY and GLP-1) are recently discovered peptides that are associated with lipid metabolism, insulin resistance, and control appetite. The purpose of this study was to investigate the effects of acute treadmill exercise(walking, 45min ; all-out running, 5min) on Adiponectin and gut hormones in high school ssireum player(light class, n=8; heavy class, n=8). From the experimental results, Adiponectin and ghrelin of light class were significantly higher than heavy class(p<.05), but there was no difference between pre and post exercise. Insulin level of heavy class was significantly higher than that of light class(p<.01) and no difference between pre and post exercise. Only glucagon significantly increased after exercise(p<.01), but no difference between classes. PYY and GLP-1 were no difference on classes and pre vs. post-exercise. The result of this study suggest that adiponectin, ghrelin and insulin were affected by body weight(light class vs. heavy class) and glucagon was affected by acute exercise.

• Journal of Service Research and Studies
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• v.14 no.2
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• pp.37-47
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• 2024

Currently, social interest in post-cremation funerals is growing due to the establishment of cremation culture. In addition, as awareness of nature-friendly funeral methods spreads in modern times, the demand for tree burial grounds and tree groves, which are representative natural burial methods, is increasing. However, if the current method of relying on trees is used, the forest burial may damage the forest and turn it into another cemetery. The tree decoration is a funeral method that contains the temporal meaning of humans returning to the space of nature that we have, and the philosophical meaning that humans return in compliance with nature. Like this, there are quite a few concerns. Even though tree burials are not the traditional burial facilities we are familiar with, many of the facilities and operating systems adopt the standards of park cemeteries and have stricter standards and restrictions than natural burials under the law. This rigidity is intended to preserve the forest, but the reality is that it limits the expansion and operation of tree plantations. To this end, this study seeks to find specific improvement measures for sustainable tree plantation operation. To this end, we look at the types of natural fields in foreign countries and find directions for tree planting that can be effectively applied and established in accordance with the sentiments of the people. Specific improvement measures include an enshrinement method that does not rely on memorial trees, the operation of anonymous or anonymous tree planting, a change in the method of visiting and commemorating, and various mountaineering methods, thereby suggesting alternatives to sustainable tree planting in Korea. The place where tree planting is implemented is the forest, that is, the forest itself. I should be a place where the spirit of natural return, which is the essence of the deceased, can be celebrated through the forest, not a funeral facility. By doing so, it will be possible to provide the public value of the forest, that is, the social function of the forest, in the name of an eco-friendly funeral service.

• Korean Journal of Social Issues
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• v.18 no.1
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• pp.127-156
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• 2017

최근 몇 년 동안 서울에서는 도시공간에 관한 권리를 둘러싼 격렬한 투쟁이 이어져왔다. 급작스러운 임대료 상승과 그에 뒤따르는 폭력적 전치는 이제 도시생활의 일상적 의례의 하나로 자리잡은 듯하다. 흔히 '젠트리피케이션'으로 명명되는 도시공간의 자본화는 한편으로 도시 내 계급지배가 관철되는 대표적 양상이지만, 다른 한편으로는 다양한 형태의 도시운동이 발생하는 조건과 배경으로도 작용한다. 이 논문에서는 최근 서울의 도시공간에서 발견되는 도시운동의 새로운 형태들을 2010년 이후 등장한 세 개의 도시 운동 집단, '맘편히장사하고픈상인모임(맘상모),' 리슨투더시티, 비빌기지에 초점을 맞춰 검토한다. 구체적으로 이 글에서는 도시공간에 대한 이들의 대안적 상상과 실천의 형성 과정을 서울의 젠트리피케이션이라는 맥락에서 살펴보고, 이들이 제시하는 도시운동의 '새로움'을 과거의 도시운동과 비교 분석하며, 도시운동으로서 이들의 실천이 지닌 함의를 도시권의 관점에서 고찰한다. 내용과 형식의 다양성에도 불구하고 이들 집단의 행동은 몇몇 핵심적 특성을 공유한다. 첫째, 이들은 공동재(commons)로서의 도시공간을 추구한다. 둘째, 이들은 느슨하고 유연하며 소규모의 조직을 지향한다. 셋째, 이들은 예술과 문화를 주체형성에 적극적으로 동원한다. 이러한 특성들은 철거민운동으로 대표되는 전통적 계급 기반 도시운동과 뚜렷한 차이를 나타내며, 계급 이후(post-class) 도시권의 전망을 선취한다.

• The Korean Journal of Mycology
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• v.52 no.1
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• pp.1-11
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• 2024

The present study aimed to screen unrecorded wild yeasts from Jeju lsland and Jangsado on the southern coast of Korea, and to investigate their microbiological characteristics. To date, Coniozyma leucospermi JJD37-2, Hanseniaspora thailandica JJD44-1, Kluyveromyces nonfermentans JJD15-1, Kockovaella fuzhouensis JJD47-3, Vishniacozyma heimaeyensis JJD8-4, Candida carpophila JSDH24-1, Wickerhamomyces strasburgensis JSDH34-2, Candida savonica HJD6-4, and Candida karawaiewii YP23-3 have not been previously recorded in Korea. In the present study, we investigated the microbiological characteristics of these previously unrecorded yeasts. Except for W. strasburgensis JSDH34-2 strain, none of the strains formed spores, and only the C. leucospermi JJD37-2 strain formed pseudomycelia. Almost all strains grew well in yeast extract-peptone-dextrose (YPD) medium, potato dextrose (PD) medium and yeast extract-malt extract (YM) media. C. carpophila JSDH24-1 and W. strasburgensis JSDH34-2 also grew well in YPD medium containing 10% NaCl. H. thailandica JJD44-1 is fermented to produce glucose, fructose and mannose.

• Journal of the military operations research society of Korea
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• v.32 no.2
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• pp.92-113
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• 2006

The main purpose of this study is to determine the optimal periodic inspection for Anti-Ship-Missile(Harpoon Block 1) fielding on Korea Navy Ship. In order to perform this study, the data from the Korea Navy (Harpoon maintenance & storage reliability) were collected from 1984 to 2004. Storage failure rate & MTBF for Harpoon block 1 were analysed by using mathematical model & reliability analysis software(Relex) and finally determined optimal periodic inspection. The suggested methodology will be used to determine and reevaluate the periodic inspection of Anti-Ship-Missiles for the Korea Navy.