• 한국지구물리탐사학회:학술대회논문집
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• 1999.08a
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• pp.37-47
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• 1999

Among the geophysical exploration methods, electromagnetic (EM) survey must have the broadest range of instrumental systems and remarkable range of applications. There is a plethora of available techniques and instruments, and the depth of investigation and resolution are highly dependent on the particular systems used according to their operating frequency and source-receiver configuration. This diversity of EM systems, however, provides a wide range of instruments or methodologies to choose in order to select the most appropriate tool for the task in hand. This rather than being a disadvantage, would be a major strength of EM methods. Modern EM equipments are remarkably portable, considering their sophistication. Coupled with major advances in recent computer technology, accurate modeling and interpretation techniques are on the way of continuous development and upgrade which, in turn, make the EM methods to become much more heavily used, especially for engineering and environmental applications. We aim to provide a brief theoretical principles, survey techniques and case histories of some selected EM methods that can be applied to geotechnical and environmental problems in Korea.

• Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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• v.23 no.6
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• pp.52-58
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• 2009

When a fire breaks out, it is frequent that large sized miserable death is happened by seriousness of poisonous gas and peculiarity of space because the building construction is recently more complex and diverse. So early countermeasure in preparation for evacuation escape linked directly with a loss of lives is pressing. Because escape light that mark fixing one-way of existing way is not efficiently extricated refugees from dangers when a fire breaks out, construction of system that can extricate refugees from dangers and suppress early a fire by grasping correctly fire point is required urgently. When a fire breaks out, all escape lights connected with fire sensor and reception group which have ill aiming in these point will lead people to safe emergency entrance of opposite direction of place that a fire is broken out after being calculated the direction and speed of flame and smoke. There is the purpose of my research in development of artificial intelligent directional escape light that can mark direction to most suitable pull-out and assist in early extinguishing a fire.

• The Journal of the Convergence on Culture Technology
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• v.7 no.4
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• pp.727-734
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• 2021

The purpose of this study is to analyze the perception of the residents of the new city by examining the consciousness of the occupants to understand the characteristics of the residents of the city of Bundang. As a result of evaluating and analyzing the durability by visual inspection and some equipment tests at the site of the on-site investigation, it was found that there is a problem with the quality, and continuous maintenance is required to improve the durability and usability of the apartment house. In particular, many cracks appearing in the rapidly deteriorated part should be repaired promptly, and a systematic plan should be formulated and carried out. In the apartment housing perception survey of Bundang new city residents, about 93.4% showed above-average satisfaction, and 43.4% showed a favorable preference toward the residential area.

• Journal of Radiation Protection and Research
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• v.22 no.2
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• pp.111-117
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• 1997

Recently, the conclusion of Comprehensive Test Ban Treaty(CTBT) is globally constructing a network system for nuclear test monitoring. The radionuclide experts of the Conference on Disarmament recommended that the detection of nuclear debris in the atmosphere was an essential factor of nuclear test monitoring and proposed the technical requirements. Based on those requirements, atmospheric radionuclide monitoring system to detect nuclear debris generated from the nuclear explosion test was composed. The system is comprised of high volume air sampler(HVAS), filter paper presser and high purity germanium detector(HPGe). Minimum detectable concentrations(MDCs) of the key nuclides requiring in CTBT monitoring strategies are determined by considering of decay time, counting time and flow rate of the high volume air sampler for the rapid explosion and the optimum measurement condition. The results were selected $10{\pm}$2h, $20{\pm}$2h and $850{\pm}50m^3$/h as parameters, respectively. The relation between the natural air-borne radionuclide concentration of $^{212}Pb$ and MDC were calculated which gave effect in the Compton continuum baseline due to those nuclides in the gamma-ray spectroscopy. These results can be used as an actually tool in the CTBT monitoring strategies.

• The Journal of the Korea Contents Association
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• v.12 no.4
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• pp.380-389
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• 2012

This study aims to argue fundamental issues on factors associated with revenues of hand injury patients to effectively manage hospitals specialized in hand injuries. The study employes 2,461 patients who entered S hospital from 2008 to 2010 with hand injuries. The followings are the results of the study. First, there is significant difference among occurrence of hand injuries with regard to demographics of patients. That is, it is likely to have longer average length of stay(ALOS) of male over female, of the elderly over infants and toddlers, and vice versa on average daily patient revenues. Also, compared to patients with traffic and labor insurance, patients with health insurance is likely to stay longer at lower daily cost. Fifth, demographics and incidence of hand injuries were significantly associated with average length of stay(ALOS) and average daily patient revenues. That is, male over female, age over 60 over any other age categories, patients with traffic and labor insurances over one with health insurance, cases with laceration, avulsion and bone transplantation over any other types of hand injury patients were factors significantly related to ALOS and average daily patient revenues. In sum, it is needed to focus on education and campaign to raise attentions on preventing various hand injuries. Also, managers at hospitals specialized in hand injuries should pay attention on issues such as reducing ALOS to run the organization effectively.

• Journal of Nutrition and Health
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• v.12 no.2
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• pp.1-13
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• 1979

성장발육하는 시기에 영양과 성장하는 아동들의 체위와는 밀접한 관계가 있고 또한 영양부족과 그로 말미암아 자라나는 이학적 소견과도 불가분의 관계가 있기 때문에 그동안 우리나라에서 부분적, 단편적으로 연구 발표된 문헌을 중심으로 그를 검토 고찰하여 보았다. 그 결과를 요약하면 다음과 같다. 우리나라 아동들이 출생후 6개월까지는 주로 모유에 의존하고, 약간이 인공영양에 의존하고 있는데, 이 시기에는 다른 선진제국의 어린이들의 성장발육과의 별 차이가 없었다. 그러나 이유기인 $6{\sim}30$개월 사이에는 우리나라 어머니들의 이유에 대한 지식이 빈약하고 이들 음식물을 그대로 아기들에게 적용하기 힘든 이유등으로 아이들에게 보급해서 주는 음식물이 빈약함으로 말미암아 다른 선진제국 아이들에 비해서 이 시기에 체위가 많이 떨어지고 빈혈현상을 나타내는 것을 볼 수 있다. 이때 고양군에서 농민의 아동들에 대해서 시행한 영양조사 내용을 보면, 전체 칼로리도 부족되고 특히 단백질, 철분, 칼슘, 비타민 A, B복합제가 전반적으로 부족되는 것을 알았다. 이는 어머니들의 육아와 이유식에 대한 지식의 결집도 중요한 역할을 했겠거니와 더욱더 중요한것은 우리나라 어른들의 식습관이, 민족적 전통적으로 짜고, 매웁고, 딱딱해서 이를 아기들에게 그대로 적응해서 먹이기가 힘든 것도 더 중요한 이유가 된다. 어른들을 위한 음식물에도 맵지 않고, 짜지 않으며, 아기들도 즐겨 먹을 수 있는 유동식 혹은 반유동식으로 된 영양가치가 좋은 음식물을 발전시켜 애용하도록 하는 것이 민족적인 긴급한 과제라고 하겠다. 그렇지 않으면 선진제국 모양으로 이유기에 있는 아이들을 위해서 아이들이 즐겨 먹을 수 있는 이유식을 크게 발전시켜서 이유기의 아이들에게 저렴하게 공급할 수 있는 생산공장과 제도의 마련이 긴급하다고 하겠다. 우리 민족의 체위를 향상 시키는데 영양학자와 영양사들에게 기대 하는 바가 크다. 육아하는 어머니의 교육정도와경제적인 면이 아기 체위에 주는 영향에 대한 연구에서는 교육정도가 높고, 경제적으로 좋은 위치에 있는 엄마가, 교육정도가 낮고 경제적으로 가난한 위치에 있는 어머니보다 아이들 체위에 훨씬 좋게 기를 수 있다는 것을 알았다. 특히 이유기에 들어간 6개월 이후에 체위 격차가 심한 것을 볼 때 보충해 주는 음식물의 적절한 보급이 얼마나 필요한가를 말해 주는 것이며 이에는 어머니의 교양과 열의와 경제적 뒷받침이 얼마나 필요하다는 것을 말해주는 것이다. 지역별로 서울에서 부유층 가정과 학교 아동, 농촌 지역 가정과 학교아동, 강원도 산간지역 가정과 학교 아등으로 나누어서 자라나는 아동들의 체위와 이학적 소친을 연구 조사한 바로는 서울 부유층이 제일 좋고 그 다음이 서울 빈한층, 강원도 산간지역 아동의 순으로 좋았으며 농촌지역 아종은 체위가 가장 떨어졌다. 구각증, 구내염등은 강원도 산간지역 아동에 제일 많고, 다음이 농촌지역, 서울 판자촌지역의 순으로 많으며 서울부유충지역이 가장 적어서 이는 산간일수록 또 는 빈한할수록 등물성단백질이 부족되는 것을 말해 주는 것이다. 지역별 혈색소치는 109gm/100ml 이하인 경우가 서울 빈한층가정 아동에 제일 많아서 51.7%나 되며 다음이 산간지역가정, 농촌지역가정의 순으로 많으며 서울부유층가정 아동은 2.2%에 지나지 않는다. 한국아등의 체위와 일본아동의 체위를 비교해 본 바로는 출생 후 약 12개월까지는 별차가 없지만 그후로는 점차로 그 격차가 심해져서 $12{\sim}15$세 사이에 평균체중면에서 5kg정도, 신장면에서 5cm정도의 큰 격차를 나타냈다. 그러나 그후로 성인이 되어감에 따라서 그 격차는 좁아졌다. 이는 일본국이 경제적으로 우리보다 우위에 있음에 따라서 아이들 성장에 필요한 영양분을 적기에 적당하게 공급해 주었기 때문이며 우리는 많은아이들이 가만하기 때문에 그 나이에 맞는 영양분 보급을 적당히 하지 못한 결과로 생각할 수 밖에 없다. 한국 아동의 발육표준치를 1965년초에 측정한 것과 1975년도에 측정한 것을 비교해 본 결과 1975년 치는 1965년도치에 비해 체중과 신장 면에서 상당히 증가하였다. 이는 우리라라 경제상태가 좋아지면서 굶는 아이들이 적어지거나 없어졌을 뿐만 아니라 식품 내용이 개선된 때문으로 해석된다. 따라서 민족의 체위가 개선되고 향상되려면 제일 먼저 해결되어야 할 문제는 국가의 경제력이 향상될뿐만 아니라 빈부의 격차가 적어져서 우리나라에 생을 받은 사람은 누구나 굶는 자가 없이 균형 있는 영양분을 충분히 섭취 할 수 있는기회를 갖도록 되어야 하겠다. 영양학자와 식품관리자들은 우러나라 아이들이 타고난 체위의 잠재성을 충분히 키우기 위해서 어떠한 음식물이 얼마나 필요한지 계산하여 이를 작물로 충분히 충당할 수 있도륵 계획해서 농수산물을 생산하도록 해야겠다. 영양학자들은 우리 민족의 음식물을 개선해서 아기들이 즐겨 먹을 수 있는 어른들의 음식물, 영양식을 발전시켜 이유기에 받는 우리 어린아기들의 수난을 조속히 극복하는 것이 바람직하다. 또한 영양에 대한 교육을 국민학교, 중학교 교과과정에 많이 넣어서 교육하고 영양에 대한 교육과 보급을 조직적으로, 신문, 라디오, 텔레비젼등을 통해서 성인교육을 강화해서 모든 국민들이 적은 돈을 가지고도 보다 나은 영양물을 구해서 섭취할 수 있는 지혜를 가지도록 해야겠다. 국민학교 재학중 및 졸업시기를 전후딘서 체위가 많이 떨어지며 그 영향이 일생동안 간다는 것을 감안할 때 국민학교에서 점심 한끼라도 영양식을 보급해서 우리 국민체위 향상을 위해서 나라에서 직접적으로 공헌하는 바가 있었으면 한다.

• Information Systems Review
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• v.10 no.3
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• pp.21-38
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• 2008

After the introduction stage, Korean mobile game market is approaching to the growing stage leading mobile contents market. The environment for the mobile contents business is getting better by the expansion of the 3G mobile networks and the enhancement of the mobile devices. In this research, at a content level, not a service level, market success factors of mobile games and the differences by genres and their changes over time were investigated through the analysis of the real market data of mobile games launched by a Korean mobile carrier. The most important factors for market success, especially for the genres of RPG/Tycoon/Simulation and Shooting/Action/Arcade, were found to be the 'design' factor and its effect turned to be getting stronger as time goes by after the launch. Consumers' purchase rate was actually higher for the mobile games of popular genres or in relation with socially popular subject matters. Also 'design' and 'creativity' factors which are related to the quality of contents, have gotten more important over time. One of the most interesting results was that there existed a "blue ocean" genres like Sports/Racing/Leisure which had a steady demand but not many competing games. In the analysis of the 'convenience' factor, one interesting implication for mobile game producers was that there exists a trade off between the ease of initial adoption and the steady sales of a mobile game.

• Management & Information Systems Review
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• v.36 no.1
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• pp.291-307
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• 2017

This study analyzes the effects of global diversification level on discretion accruals and firm value. In order to verify the hypothesis of this study, the sample of securities companies was selected from 2012 to 2015, and the final sample is 2,139 firm-year. The results of this paper are as follows : First, discretionary accruals increased as the diversification level increased. We conducted an additional analysis as to whether the increase in information asymmetry due to international diversification affects discretionary accruals. As a result, the increase of information asymmetry due to international diversification increased discretionary accruals. This analysis is consistent with EI Mehdi and Seboui(2001)'s study. Second, we analyze the impact of international diversification on corporate value. In previous studies, there was no consistent conclusion about the relationship between international diversification and firm value(Christophe and Pfeiffer, 2002; Denis and Vost, 2002; Bodnar and Wenintrop, 1997; Bodnar et al., 2003). Therefore, this study hypothesizes that the increase in discretionary accruals, which have been driven by international diversification, will have an impact on firm value. Aa a result of the analysis, we found that the increase in discretionary accruals due to diversification declines the firm value. This means that the increase in discretionary accruals due to diversification is utilized as and opportunistic means by taking individual gain of managers.

• Journal of Chest Surgery
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• v.31 no.6
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• pp.567-575
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• 1998

Panax Ginseng C.A. Meyer has been known for hundreds of years as the most valuable drug having mysterious effects among all the herbal medicines and plants in Korea. Also, many experimental studies have been performed recently that the various effects were identified and applied clinically. So we attempted an experimental study on the effect of ginsenoside Rg1 mixtures in an isolated rat heart with the use of the Langendorff model. The objective of this study was to determine whether this ginsenoside Rg1 mixtures would protect the myocardial injury after ischemic arrest and reperfusion. Isolated rat hearts were allowed to equilibrate for 20 minutes and were then subjected to 15 minutes of normothermic ischemia. After this ischemic period, isolated rat hearts were allowed to reperfusion for 10 minutes(Ischemic Group). In other group , isolated rat hearts were perfused for 60 minutes continuously with normothermia( Normothermic Group). Hemodynamic and biochemical parameters such as heart rate, left ventricular pressure, +dp/dt max, coronary blood flow and cardiac enzymes were measured during initial perfusion, ischemia, reperfusion period (Ischemic group) and 20, 40 and 60 minutes after continuous perfusion(Normothermic group). After completion of the experiment, this data was evaluated and the following results were obtained. 1. Heart rates showed an increase in both ischemic and normothermic experimental groups, but statistically significant differences were not identified. 2. LVP(Left Ventricular Pressure) showed statistically significant differences in both ischemic and normothermic experimental groups(p<0.005, p<0.01). 3. +dp/dt max showed statistically significant differences in both ischemic and normothermic experimental groups(p<0.01, p<0.01). 4. There were no statistically significant differences in coronary blood flow and cardiac cenzymes in all groups, but experimental groups seemed to have better protection and recovery. These results suggest that ginsenoside Rg1 mixtures has a protective effect on the myocardial injury after ischemia and reperfusion.

• Journal of Korea Port Economic Association
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• v.23 no.4
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• pp.196-215
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• 2007

The Representatives of Korea & India hold The Sixth negotiation for conclusion of Korean-India CEPA(Comprehensive Economic Partnership Agreement) at IFANS(Institute of Foreign Affairs & National Security) in Seoul at April 4, 2007. The latest, India is paid attention by the citizen of the world as the leading country that it lead the 21C's world economic with the China, India is called one of the BRICs and Chindia countries. Now, the concern of the citizen of world inclines huge potential energy of India. It is that time, we must change our concern from Chinas to India slowly. This paper put emphasis the point that we have to move switch over the focus of our study from to India, now.