• 한국건설관리학회:학술대회논문집
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• 한국건설관리학회 2002년도 학술대회지
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• pp.539-542
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• 2002

도로면 유지보수를 시행함에 있어 노면의 파손정도에 따라 다양한 공법의 사용이 가능하나 크랙 실링 공법은 예방적 차원에서 도로면에 발생된 크랙을 초기에 효과적으로 보수할 수 있는 방법이다. 그러나, 교통량이 많은 대도시나 고속도로에서 시행되는 도로면 유지보수 작업의 경우 노무자가 열악한 작업환경 내에서 작업을 수행해야 하므로 안전성 확보에 문제가 있고, 도로면 유지보수 작업의 특성상 현장 노무자의 잦은 이직(labor turnover) 및 3D업종의 기피로 인한 숙련공 부족현상은 현 도로면 유지보수 작업의 생산성 및 품질 저하를 가져오고 있다. 선진 외국의 경우 크랙 실링 공법의 이점 및 도로 유지보수 공사의 위험 요소를 인식하여 자동화 장비의 개발을 통한 안전성, 생산성 향상 및 경제성 확보에 다양한 연구 노력을 기울이고 있으나, 국내의 경우 도로면 유지보수 공사를 위한 기술축적이나 자동화 장비 개발을 위한 시도는 매우 미약한 실정이다. 따라서, 본 연구에서는 도로면 유지보수 공법 중 크랙 실링 공법의 자동화를 통해 노무자의 안전사고를 방지하고, 품질 및 생산성 향상을 도모할 수 있는 크랙 실링 자동화 방안을 제시하고자 한다.

• 대한관절경학회지
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• 제5권1호
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• pp.32-35
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• 2001

목적 : 완관절 삼각 섬유 연골 복합체 손상을 관절경적으로 처치하고 그 효능을 평가하고자 하였다. 대상 및 방법 : 급성 또는 만성 외상의 병력이 있는 완관절 삼각 섬유 연골 복합체 손상 환자 13명, 14례를 대상으로 하였으며, 환자의 연령은 21세에서 45세로 평균 연령은 28.3세였다. 관절 조영술, 이학적 검사 또는 자기 공명 영상 검사에서 양성 소견이 보이는 경우, 관절경 검사를 시행하여 8례의 중심성 파열의 경우 관절경적 변연 절제술을, 6례의 변연부 파열의 경우 봉합술을 시행하고, 평균 28개월간 추시 관찰 하였다. 술후 결과 판정은 Green과 O'Brien의 방식을 이용하였다. 결과 : 9례에서 우수, 3례에서 양호, 2례에서 보통의 결과를 관찰할 수 있었다. 이중 양호 이상의 결과를 얻은 12례의 환자들은 본래 직업에 복귀할 수 있었다. 결론 : 삼각 섬유 연골 복합체 손상에 대한 관절경적 처치는 조기 재활과 일상생활에 복귀를 가능하게 하는 권장할 수 있는 방법 중의 하나로 사료된다.

• Environmental Analysis Health and Toxicology
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• 제15권1_2호
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• pp.19-29
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• 2000

아세트아닐리드는 의약품과 염료의 합성과정에서 중간체로서 공기와 폐수를 통하여 환경 중에 방출될 수 있다. 아세트아닐리드는 호기적 조건하에서 신속히 생분해되고 OH 래디컬의 존재하에 간접적으로 광분해된다. 생물농축계수는 4.5로 추정되므로 수생생물에서의 생물농축은 낮을 것으로 예상된다. 아세트아닐리드에 관한 생태독성학적 데이터 조사결과 4종 어류에 대한 급성독성치만 보고되어 있으며, EUSES시스템에 의하면 어류에서의 최저 PNEC 값(예상 무작용농도)은 0.01mg/l이고 표면수에서의 PEC값(예상 환경농도)은 지역수준에서 최악의 경우 9.1$\times$$10^{-5}$mg/l이다. 지역수준에서 표면수에 대한 아세트아닐리드의 RCR(위해성지수)은 9.1$\times$$10^{-3}$으로 추정되어 어류에 대한 안전성은 충분하다. 그러나 국지 수준에서의 RCR은 물과 침적물에서 각각 1.3과 1.6이므로 제조공장 주변에서는 생태독성 위험이 존재할 것으로 추정된다. 아세트아닐리드의 환경위해성 평가를 보다 정확하게 하기 위해서는 물벼룩과 조류에 대한 급성독성 자료가 보완되어야 할 것이며, 따라서 이에 대한 실험이 진행되어야 할 것으로 사료된다.

• 정보관리학회지
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• 제30권4호
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• pp.265-281
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• 2013

우리나라 초기 개신교 선교사에 대한 역사는 19세기 말 쇄국정치가 막을 내리고 서구문명에 대한 문이 열리면서 외국인 선교사들이 의사 혹은 교사 등의 전문가 신분으로 들어와 활동하면서 시작되었다. 이러한 선교사들의 기록물은 단순한 종교적인 가치를 넘어 우리나라 근대 역사, 정치, 경제, 사회를 새로운 시각으로 조명할 수 있는 중요한 사료로 평가되고 있다. 하지만 초기 선교사 자료의 역사적인 가치는 인정하면서도 이러한 자료를 수집하고 보존하며 접근을 용이하게 할 수 있는 정책이나 방안에 대한 체계적인 시도는 현재까지 매우 미비한 것으로 나타나고 있다. 보고서, 서적, 정기간행물, 일기, 편지, 사진 등의 다양한 형태를 띠고 있는 초기선교사 자료는 현재 이들을 파송한 선교회, 신학대학, 정부기관, 도서관, 박물관, 연구소, 선교사 가족 등에 산재되어 있는 실정이다. 이에 본 연구는 이러한 초기 외국인 선교사 자료에 대한 현황조사 및 전문가 심층면담을 통해 이들 자료의 아카이브 현황과 향후 체계화된 디지털 아카이브 시스템 구축에 필요한 기초 자료를 제공하는데 목적이 있다. 본 연구의 범위는 우리나라에 개신교 선교사가 처음 들어오기 시작한 1800년대부터 일본강점기 이전 1910년으로 제한하였다.

• 한국학교보건학회지
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• 제11권1호
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• pp.111-121
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• 1998

This is the study to the effect that the problems of the protective institution where the whole health of school is performed should be solved for the purpose of much more effective school business after investigating the situations of the management about health system in the elementary school of seoul city The subjects of the research are five students of the school which practices health class in the protective institution, five students of the school which puts health class to practice in each classroom and five nursing teachers who work for each elementary school Its data resulted from that from July to September 1997, I visited five schools in person at Kang nam ku, Dong chak ku, Yong san ku, Kwan ak ku, Kang dong ku and then I met and talked with the nursing teacher and the children Through this inspection and interpretation, I could figure out such things as follows. 1 The structure of the nursing room is so small that it has quite a few things inconvenient for the children and the nursing teacher to use together So for the sake of the health in school, first of all, Its size has to be larger 2. The name as the protective institution has to be changed into the health room. And the room for rest cure, dressing room, counselling room and the room for the health education should be equipped with the inside of health room 3 The nursing teacher as a health teacher has to carry out the health class at a health room. 4 It was required that the principal and the Ministry of Education should be highly interested in the health of school In particular, the advice for instructing expert agents about the health and the cooperation of the principal was urgently demanded. Through the result above, the health of school will be accomplished not only in first-aid treat and injection but also in the education about health as a main duty And the nursing teacher also can play a role as a teacher for health fully The programming, practice and estimation of the health room of the business for health in school will be feedback.

• 한국경제지리학회지
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• 제15권4호
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• pp.708-720
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• 2012

이 논문의 주요 목적은 커뮤니티 비즈니스의 지속가능한 성장을 위한 대상, 방법, 주체의 관계를 분석하는 것이다. 1990년대 이후 정부는 농촌경제 활성화를 위한 다양한 정책을 실행해 왔으나, 많은 정책이 효과를 보지 못했다. 그 이유는, 지역주민의 역량 강화에 대한 고려 없이 하드웨어 인프라 구축에 집중되었기 때문이다. 최근 들어 이러한 문제를 극복하기 위해 커뮤니티 비즈니스 정책이 전국에서 많이 실시되고 있다. 이전과 같은 문제를 겪지 않기 위해서는 기존의 커뮤니티 비즈니스에 대한 철저한 분석이 요구된다. 이를 위해, 성미산 마을 내 4개의 경제 공동체 사례를 분석하였다. 그 결과는 다음과 같다. 첫째, 커뮤니티 비즈니스가 성장하기 위해서, 지역사회의 필요와 지역주민의 요구가 반영되어야 한다. 성미산 커뮤니티 비즈니스의 경우, 지역주민들은 비록 그 상품의 맛과 가격이 매력이 있지 않다 하더라도 그들의 상품에 대해 상대적인 만족감을 느끼고 있었다. 이유는 그 상품이 지역주민의 필요에 의해 만들어졌기 때문이다. 둘째, 커뮤니티 비즈니스의 초기 사업 정착 단계에 필요한 안정적 수익구조 확보를 위해서, 연관 커뮤니티 비즈니스와의 연계가 필요하다. 성미산 커뮤니티 비즈니스는 서로의 상품을 이용함으로써 안정된 수익구조를 만들었다.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제12권10호
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• pp.4678-4702
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• 2018

Traffic Matrix estimation has always caught attention from researchers for better network management and future planning. With the advent of high traffic loads due to Cloud Computing platforms and Software Defined Networking based tunable routing and traffic management algorithms on the Internet, it is more necessary as ever to be able to predict current and future traffic volumes on the network. For large networks such origin-destination traffic prediction problem takes the form of a large under- constrained and under-determined system of equations with a dynamic measurement matrix. Previously, the researchers had relied on the assumption that the measurement (routing) matrix is stationary due to which the schemes are not suitable for modern software defined networks. In this work, we present our Compressed Sensing with Dynamic Model Estimation (CS-DME) architecture suitable for modern software defined networks. Our main contributions are: (1) we formulate an approach in which measurement matrix in the compressed sensing scheme can be accurately and dynamically estimated through a reformulation of the problem based on traffic demands. (2) We show that the problem formulation using a dynamic measurement matrix based on instantaneous traffic demands may be used instead of a stationary binary routing matrix which is more suitable to modern Software Defined Networks that are constantly evolving in terms of routing by inspection of its Eigen Spectrum using two real world datasets. (3) We also show that linking this compressed measurement matrix dynamically with the measured parameters can lead to acceptable estimation of Origin Destination (OD) Traffic flows with marginally poor results with other state-of-art schemes relying on fixed measurement matrices. (4) Furthermore, using this compressed reformulated problem, a new strategy for selection of vantage points for most efficient traffic matrix estimation is also presented through a secondary compression technique based on subset of link measurements. Experimental evaluation of proposed technique using real world datasets Abilene and GEANT shows that the technique is practical to be used in modern software defined networks. Further, the performance of the scheme is compared with recent state of the art techniques proposed in research literature.

• 산업경영시스템학회지
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• 제35권2호
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• pp.9-15
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• 2012

The purpose of this study was to investigate the effects of the secondary tasks such as sending text message (STM) and searching navigation (SN) on skin conductance level (SCL) and driving performance of relatively aged and high-experienced drivers. The subjects included 26 taxi drivers; 12 males aged $56.3{\pm}4.4$ with $28.4{\pm}6.4$ years of driving experiences and 14 females aged $55.5{\pm}3.5$ with $19.4{\pm}5.0$ years of driving experiences. All subjects were instructed to keep a constant following distance (30m) from the car ahead and a given vehicle speed (80km/h or 100km/h) in a driving simulator. The relative change of SCL, vehicle velocity deviations, and average following distances were measured during driving only and driving with secondary tasks. The relative change of SCL, average following distance, and vehicle velocity deviation were more increased during the driving with secondary tasks than driving only. The relative change of SCL, vehicle velocity deviation, and average following distance were more affected by driving with 100km/hr than 80km/hr of a given vehicle speed. Secondary tasks increased a work load of drivers in term of SCL change, and decreased driving performance in terms of the vehicle velocity deviation and average following distance.

• 대한치과기공학회지
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• 제25권1호
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• pp.173-185
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• 2003

This study mainly intends to determine the factors for which dental technicians are satisfied with their jobs and how much the resulting job transfer rate is and thus to identify the correlation between them. For these purpose, 200 subjects were sampled out of dental technicians in Seoul and Incheon, and the survey was performed from July 19, 2002 to August 15 (for 25 days) with self-administered questionnaire. Out of all collected questionnaires, 131 pieces(65.5%) were addressed for this study. As for the tools for this study, the structured questionnaire was used with its proven reliability and feasibility, and the contents of questionnaire consisted of 32 questions on the basis of related references. The contents of questionnaire were categorized into 3 sections: General attribute of subjects; Factors for which dental technicians are satisfied with their jobs; and their intention of job transfer. The questionnaire consisted of total 32 questions which included general attribute of subjects(10 questions), factors of their satisfaction with jobs(17 questions) and intention of job transfer(5 questions). The data analysis was processed by computerized system with SPSS(Statistical Package for Social Sciences). Statistical analysis techniques included frequency, percentage, T-test, F-test analysis and regression analysis. As a result of those analyses, the conclusion can be summarized as follows: 1. As a result of analyzing the factors for which the subjects were satisfied with their jobs, it was found that there were significant differences in career and job title out of question items(P<0.001). It was also shown that the factors of subjects' satisfaction averaged 3.43, which was considerably higher value than I expected. It was found that job and management factors were major job satisfaction factors. 2. As a result of analyzing the intention of subjects to decide their job transfer, it was found that there were significant differences in job title and marital status out of question items(P<0.001). It was shown that the total average of the intention of their job transfer amounted to 3.06. It was shown that dental technicians have relatively higher intention of job transfer from their current work place. 3. It was found that there was inverse correlation between the factors of subjects' satisfaction with their jobs and their intention of job transfer(r=-0.490, P<0.05). Likewise, it was also found that there was inverse correlation mostly between the evaluation value for each independent variable region in term of each factor of job satisfaction and the value for the intention of job transfer. In view of these correlations, it was concluded that higher job satisfaction likely led to lower job transfer. 4. As a result of regression analysis so as to determine the influences of job satisfaction factors on the intention of job transfer, it was found that the highest influential factor was management factor. And it was shown that the test values of model were statistically significant and its explanatory power amounted to 54.6%.

• 유통과학연구
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• 제16권7호
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• pp.67-75
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• 2018

Purpose - In the 21st century, as information technology advances alongside the emergence of the 4th generation, industrial age, industrial environment has become individualized and customized. It is important to hire good quality employees for good service in the industry. The e-learning market is growing every year. Although e-learning companies are finding better quality employees in e-learning, it is not easy to find it. Companies also spend a lot of time and cost to find employee. On the employees side, they want to get a job freely when they want, but they cannot find their job easily. Furthermore, the labor market environment is changing fast. In the 4th generation, industrial age, employers require to find manpower whenever they need and want at little cost. So of their own accord, we have considered the necessity of management of human resources for employees and employers in e-learning. The purpose of this study is to propose a human cloud platform framework for enabling an efficient management of human resources in e-learning industry. Research design, data, and methodology - To pinpoint the items of a human cloud platform framework, the study was initiated according to the following process. First, items of competency relating to e-learning instructional designer was analyzed. Second, based on the items of information from this analysis, selection and validity verification took place with 5 e-learning specialists group. Third, the opinion of experts who were in charge of hiring in e-learning companies were collated with the questionnaire. Lastly, the human cloud platform framework was proposed based on opinion results. Results - The framework was comprised of 7 domains and 27 items in order to develop the human cloud platform for e-learning instructional designer. The analysis results showed that the most highly considered item were 'skill (4.60)' that employee already have the capability. Following this (in order) were 'project type (4.56)', 'work competency (4.56)', and 'strength area of instructional design (4.52)'. Conclusions - The 27 items in the human cloud platform framework were suggested in this study. Following this, we can consider to develop the human cloud platform for finding a job and hiring e-learning instructional designer easily. For successful platform operation, we need to consider reliability between employer and employee. In addition, we need quality assurance system based on operation has public confidence.