• 한국건설관리학회:학술대회논문집
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• 한국건설관리학회 2008년도 정기학술발표대회 논문집
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• pp.790-793
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• 2008

현재, 국토해양부 건설기술혁신사업의 일환으로 2006년 말부터 토공자동화를 위한 '지능형굴삭시스템개발'이 진행되고 있다. 지능형 굴삭시스템의 세부핵심요소기술 중, Task Planning System(TPS)은 토공 작업의 효율성, 안전성, 경제성 등을 고려하여 토공 설계데이터와 작업환경 인식기술에 근거한 작업환경 데이터를 분석하여 최적의 작업계획을 수립하는 시스템이다. 작업계획생성 시 효율적인 토공작업을 위해서는 플랫폼 생성 시 그 위치가 최적의 점을 형성하여 중첩되는 작업영역의 크기가 줄어들어 비효율적인 작업을 제거할 수 있으며 작업 시간을 최소화할 수 있고 굴삭작업의 생산성을 극대화찰 수 있다. 또한, 최적 플랫폼 위치 선정 시 굴삭기 제원에 따른 최적화가 되어야 굴삭기의 규격에 따른 로컬 영역의 산출 알고리즘과 호환이 될 수 있다. 본 논문은 영역 분할 과정에서 산출된 로컬영역을 기준으로 굴삭기 제원에 따른 최적화된 플랫폼 위치 선정 방안에 대하여 살펴보고 검증을 통하여 효율성을 판단하고자 한다.

• 재무관리연구
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• 제26권2호
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• pp.155-180
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• 2009

본 연구에서는 한국의 원화, 멕시코의 페소화, 브라질의 리알화 등 신흥 통화선물시장과 유럽의 유로화, 일본의 엔화, 영국의 파운드화 등 선진 통화선물시장을 대상으로 최적헤지비율을 추정하고, 외표본헤지기간을 두고 헤징유효성을 측정 및 비교하고자 하였다. 헤지비율은 모수의 추정기간을 한기간씩 이동하여 모수를 추정하는 롤링 윈도우즈(rolling windows)에 따른 OLS 모형, 오차수정모형과 일정 조건부 상관관계 이변량 GARCH(1, 1) 모형에 의해 추정하였다. 본 연구의 주요 결과는 다음과 같이 요약할 수 있다. 첫째, 일별, 주별, 월별 등 헤징기간에 관계없이 어떠한 헤징모형을 이용하더라도 한국 원/달러 선물을 이용한 헤징은 현물환율의 가격변동위험을 97% 상회할 정도로 감소시키고 있음을 보여주고 있다. 둘째, 일별, 주별, 월별 등 헤징기간에 관계없이 한국 원화 선물시장은 브라질 리알화, 멕시코 페소화 등 신흥통화 선물시장과 유럽 유로화, 영국 파운드화, 일본 엔화 등의 선진통화 선물시장보다 현물환율의 변동위험에 대한 헤징수단으로 우월함을 보여주고 있다. 이는 한국 원/달러 통화선물이 현물환율의 위험관리수단으로 유용성이 매우 높고 위험관리도구로서 역할을 성실히 수행하고 있음을 보여주는 것이라 할 수 있다. 셋째, 헤징모형 간의 헤징유효성을 비교하면, 신흥통화와 선진통화에 관계없이 최적헤지 비율의 추정에 이용된 단순모형, OLS 모형, 오차수정모형, 그리고 CCC BGARCH(1, 1) 모형에 따른 헤징성과에 유의한 차이가 없음을 보여준다. 이러한 결과에 비추어 볼 때, OLS 모형, 오차 수정모형, 이변량 GARCH(1, 1) 모형 등의 복잡한 계량모델을 이용한 헤징보다 단순히 현물보유 포지션과 반대되는 동일한 금액의 포지션을 선물시장에 취하는 단순모형을 이용한 헤징이 유용할 수 있음을 시사하고 있다. 넷째, 신흥통화와 선진통화에 관계없이 헤징기간이 늘어날수록 헤징유효성 또는 헤징성과가 높아지고 있음을 보여주고 있다.

• 한국식생활문화학회지
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• 제23권5호
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• pp.582-594
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• 2008

This study aimed at evaluating current sanitation management performances in Korean-Food restaurants by their operation types and to develop sanitary training posters based on the risk factors, in an attempt to improve the level of sanitation management in Korean food service facilities. Eighteen Korean-food restaurants that are managed by franchisor, franchisees as well as self-managed with large-scale and small-scale restaurants in Seoul and Gyeonggi-Do, were evaluated by on-the-spot inspectors with an auditing tool consisting of three dimensions, nine categories and thirty four items. Data were analyzed using SPSS. The total score of each group showed that restaurants managed by franchisees ranked the highest (59 out of 100 points), while self-managed, small-scale restaurants ranked the lowest (44 out of 100 points). In the categorization of sanitation management compliance, the dimensions of food hygiene during production recorded the lowest compliance rate of 47.7% (22.89/48.0 points) followed by the dimension of environmental hygiene 59.3% (20.17/34.0 points) and personal hygiene 60.5% (10.89/18.0 points). This indicated the need for urgent improvement. The items which showed the lowest compliance rates were 'proper thawing of frozen foods' (0%), 'notifying and observing heating/reheating temperature' (6%), 'using of hand-washing facility and proper hand-washing' (33%), 'monitoring temperature of frozen-foods and cold-foods' (35%), and 'prevention of cross-contamination' (36%) among thirty four items. Self-managed, small-scale restaurants, in particular, needed to improve sanitary practices such as 'sanitation education for employee', 'verifying the employee health inspection reports', 'storing food on the shelves 15 cm distance away from the wall', 'suitability of ventilation capacity of hoods' and 'cleanliness of drainage'. On the basis of the findings of this study, we developed sanitary training posters, especially for small-scale restaurant operators. This could be an effective tool to educate food service employees on sanitary knowledge and principles and could be used to improve the existing sanitary conditions in Korean food service facilities.

• 한국수자원학회:학술대회논문집
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• 한국수자원학회 2022년도 학술발표회
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• pp.161-161
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• 2022

Despite the impressive development of water infrastructure and management in recent decades, Korea still faces a number of threats to water security owing to such factors as climate change. This puts the country at the top spot amongst the Organization for Economic Co-operation and Development (OECD) countries in terms of water stress. It is suggested that increasing food imports and decreasing domestic food production can contribute to water and land savings and in extension, to increased water and land security. This study therefore aimed at analyzing the impact of virtual water import through food trade on the water and land savings in Korea. It was concluded that over the period 2000 - 2017, significant amounts of national water and land was saved through the importation of major upland crops. In addition, we estimated the virtual water trade (VWT) that refers to the trade of water embedded in food products. The results showed a significant increase in the amount of virtual water traded over the study period.

• 교육시설 논문지
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• 제18권6호
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• pp.3-14
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• 2011

This research aims at proposing the space planning and architectural guideline required in designing the Science High School. It investigates specific features of the science high school which are distinguished from the general high school and analyses the compositional figure of teachers and students, the teaching methods and its educational curriculum, especially the revised educational curriculum in 2009. Meanwhile, it explores the administrative systems and facilities of the existing science high schools through both the document survey and on-the-spot interview. Such endeavor results in proposing the space classification, the space composition methods and a classroom managing system, which would be suited to the science high school. Finally it presents the architectural guidelines for planning the special subject learning area that is composed of a special subject classroom, a specified lab, medial space, a project and research room and teacher's room. The result of this study could be the fundamental resources for programming the special purposed high school as well as the science high school building.

• 한국도로학회논문집
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• 제14권3호
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• pp.77-85
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• 2012

자동사고검지 알고리즘의 대부분은 사고가 발생했을 때 사고로 검지하지 못하고, 혼잡으로 검지하는 경우가 많다는 문제점을 가지고 있다. 또한 교통정보센터 운영자들은 교통사고검지시스템을 운영하면서 대부분 CCTV 육안감시 또는 운전자들의 신고에 의존하여 사고처리를 하고 있는 실정이다. 그 이유는 현재 운영되고 있는 교통사고검지시스템에서는 실제 사고가 아닌데도 불구하고, 사고라는 오검지 경고가 많이 발생되어 시스템 전체의 신뢰도가 떨어진다는 문제점이 있기 때문이다. 다시 말해 교통사고검지시스템의 알고리즘은 검지율(Detection probability)이 높아야 함과 동시에, 오검지율(False alarm probability)은 낮아야 하고, 정확한 사고지점과 시간을 검지해 낼 수 있어야 한다. 이에 본 연구는 검지율을 높이고 동시에, 오검지율을 낮추는 방법으로 기 개발된 가우시안 혼합모델(Gaussian Mixture Model)과 개별차량 Tracking을 이용하여 개발한 사고검지 알고리즘을 교통정보센터 관리시스템(Center Management System)에 적용하고, 실제 교통상황에서 사고검지율과 오검지의 빈도를 측정하여 그 효과를 검증 및 평가하고자 한다.

• 대한토목학회논문집
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• 제14권1호
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• pp.161-170
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• 1994

육역과는 달리 환경변화가 심한 수역에 관한 현상을 파악하는 기존의 재래적 환경감지기법은 막대한 장비, 인력, 시간, 경비 등에 의해 수시로 변화하는 현상을 쉽게 파악하지 못하고 있으므로 좀 더 경제적이면서 효율적인 환경인자 추출기법이 요구된다. 따라서 광역성, 신속성, 동시성이 있는 원격탐사 기법을 이용한 수역에서의 환경관리기법에 대한 연구가 요구되고, 그 연구의 일환으로써 Landsat Thematic Mapper(TM) 자료를 이용하여 지상실측값과 Digital Number(DN) 사이의 상관관계를 규명하고, 경험식과 희귀모델을 이용한 수질환경인자 추출기법의 한 모텔을 제시하였다.

• 대한디지털의료영상학회논문지
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• 제15권2호
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• pp.13-18
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• 2013

Purpose : Fluoroscopy equipment, depending on the type of changes that occur in the patient's position ESD and study the patient's scatter ray of ESD Practitioners considered a comparative analysis was to evaluate the correct dose. Materials and Methods : HITACHI four overtube type TU-8000 Flat Detector and Under tube C-Arm Philips' Multi Diagnost Eleva with Flat Detector type were measured by. Each devices is a measure of the patient's esd randophantom position in tabel unfors Xi multi funtion then fixed to the abdomen fluoroscopy and 10 seconds, spot was measured three times, practitioners of the incident surface dose by considering the patient's scatter ray of the table for each device in the average human stomach 21cm thickness acrylic phantom ($25cm{\times}25cm$) Place the practitioner position after position randophantom unfors Xi multi funtion in the thyroid and stomach 1 minute by a fixed one-time fluoroscopy and measured. Results : 10 seconds and the patient perspective of the c-arm ESD 1.2 times smaller on the AP and oblique measurements were measured in the 6-13 times smaller. spot positions to changes in the measured three times on the AP of the abdomen, ESD is 18 times smaller c-arm measurements and the oblique measurement was 19-30 times smaller. And 1 minute at practitioners fluoroscopy esd in the thyroid 2.12 times the c-arm, chest 1.75 times less the dose was measured. On the AP, depending on the device, but the lack of dose difference oblique positions of the two devices depending on changes in the area due to changes in both the AP than on the dose increased, the difference in dose between the two devices, the maximum difference was approximately 27 times. Conclusion : Fluoroscopic equipment at the time of inspection in accordance with changes in dose according to the patient and the patient's positions changes, because the area of the scatter ray considering the change of dose measurements be made, and study of the equipment according to the characteristics of the efficiency and the exposure of the patient and practitioner is considered smooth study equipment manufacturers that can be done is to build the system and think that is also important. Various fluoroscopy when you check future changes in many factors of change in dose for the equipment in the laboratory system by considering the scatter ray radiation shielding for the management to take advantage of reckless undertube have been utilized as more exposure Reduction activities can help is considered as the direction.

• 한국안전학회지
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• 제26권2호
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• pp.89-98
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• 2011

The traffic accidents at a construction site, which happen due to construction vehicles' frequent access to a construction site, its subsequent conflicts with ordinary vehicles and pedestrians, and inappropriate installation & management of traffic security facilities, have not many proportions in all traffic accidents, but obviously, the accident damage is quite serious when comparing the level of the fatal per one accident. This research conducted an analysis of traffic accident injury severity using Ordered Probit Model in relation to 241 traffic accident cases that occurred caused by construction sites among the traffic accidents that took place in Seoul and Gyeoggi-do region for two years from 2006 until 2007. As a result, the significant variables enough to explain traffic accident injury severity were analyzed to be the state of road surface, linear shape of an accident spot & whether the damaging car belongs to the vehicle for construction, and whether vehicles have access to a construction site at the time of an accident. Through this, this research found out some fact as follows: first, there need to be more aggressive management of the vehicles for construction and a year-round placement of the manpower who can control vehicular access to a construction site. Second, it is necessary to get drivers to recognize the fact that there exists a construction site on the construction section which is on the border of curved roads in advance to prevent a traffic accident, helping to reduce socioeconomic loss & costs incurred by a traffic accident.

• 한국학교ㆍ지역보건교육학회지
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• 제11권2호
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• pp.89-102
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• 2010

Objectives: This study was conducted to compare health behavior between obese children and those with standard body weight, analyzing the correlation in their health behavior, and further making it useful data for the development of programs for a better education on health. Methods: To achieve the goal of this survey as mentioned, we have carried out a research targeting on a total of 636 elementary school students, 505 children of standard body weight and 131 children of obesity, all of whom belong to elementary school students in Seoul, the capital city of Korea. And we have itemized the research into 'eating habits', 'physical activity, 'dieting experience in the past', and 'stress and release management' in order to spot the specific health behavior leading to obesity. Results: 1. Factors for diseases mainly from obesity were statistically significantly differentdepending on degree of the subjects' self-respect and a history of obesity in their families, father($x^2$=7.172, p=.007), mother($x^2$=9.011, p=.003), and siblings($x^2$=12.431, p=.000). 2. Regarding the subjects' eating habits, some items were statistically significantly different: taking algae($x^2$=3.324, p=.043), eating breakfast($x^2$=6.070, p=.010), and eating fast($x^2$=8.551, p=.002). 3. There were some statistically significant differences in the subjects' dieting experience. For the latest 1 year, they made some attempts for that: fasting($x^2$=4.229, p=.040), reduction of eating($x^2$=25.377, p=.000), eating one meal a day($x^2$=5.582, p=.018) 4. OR(Odd Ratio)of Percieued obesity was 0.15 in the subjects' under weight than normal weight. And there was OR(Odd Ratio) 11.72 in the subjects' over weight. We can witness obese children think that they are over weight(p=.000).