• 한국정보통신학회논문지
• /
• 제17권12호
• /
• pp.2859-2864
• /
• 2013

차량용 블랙박스는 음성과 영상 그리고 자동차의 다양한 정보를 저장하는 매체이며 이러한 정보를 바탕으로 사고의 재구성이 가능해 최근 자동차 시장에서 주목을 받고 있다. 또한 대중교통 중심으로 블랙박스의 장착이 확산되면서 수년 내에 시장은 더욱 커질 전망이다. 본 연구는 차량용 블랙박스 구매결정에 영향을 미치는 요인의 대한 선호도를 분석하였다. 블랙박스 구매결정 요인을 안전성, 기능성, 차별성, 경제성으로 구분하였다. 실증적 분석을 위해 블랙박스 관련회사 직원을 대상으로 설문조사를 실시하여 수집된 설문지를 분석하였다. 분석결과를 바탕으로 블랙박스 구매결정과 관련된 실무적 의의를 논의하였다.

• 한국방재안전학회논문집
• /
• 제14권3호
• /
• pp.39-49
• /
• 2021

고용노동부가 최근 발표한 '2020년 12월 말 산업재해 현황'에 따르면 산업별로 산업재해 대상이 되고 있다. 건설업별 사고사망자 수, 사고유형별 사고사망자 수, 사업장 규모별 사고사망자 수는 5~49명으로 소규모 건설현장에서 추락사고가 대부분 발생한 것으로 나타났다. 따라서 도시형 생활주택은 소규모 건설현장으로 낙상사고 발생 확률이 매우 높다. 재해 발생을 위한 가을 모의훈련은 공공부문의 대형 건설 발주기관 위주로 실시되며 소규모 건설현장에서 주택건설업체가 실시하는 것은 국내 최초다. 본 연구는 도시생활주택의 정의, 시공특성, 안전관리 실태 등을 분석·제시하고 추락사고 발생시 긴급구호절차 매뉴얼을 개발·확산하여 사망을 최소화하였다.

• 응용통계연구
• /
• 제31권6호
• /
• pp.771-783
• /
• 2018

최근에 생명보험 산업은 보험계약의 장기 연장에 영향을 미치는 다양한 요인들에 관심을 두고 있다. 예를 들어 모집 설계사의 장기간 고객관리의 필요성, 상품상담, 투자측면의 개선 등이다. 따라서 본 연구에서는 우리나라 생명보험사의 장기계약을 유지하는 중요한 요인들을 조사하고자 한다. 이를 위해 우리나라의 모 생명보험사의 2011년 1월 1일부터 2016년 12월 31일까지의 계약건의 내용에 대한 데이터를 사용하였다. 본 논문에서는 이러한 데이터를 사용하여 벌점화 콕스 비례위험모형 접근법을 통해 계약유지기간에 중요한 영향을 미치는 변수를 선택하는 방법을 제시한다. 분석결과 설계사의 변경 유무, 연금 상품군, 그리고 안정적 투자성향과 같은 세 가지 변수가 계약건 유지에 주요한 요인으로 선택되었다.

• 산업경영시스템학회지
• /
• 제44권1호
• /
• pp.60-70
• /
• 2021

Recently, with the development of technologies for the fourth industrial revolution, convergence and complex technology are being applied to aircraft, electronic home appliances and mobile devices, and the number of parts used is increasing. Increasing the number of parts and the application of convergence technologies such as HW (hardware) and SW (software) are increasing the No Defect Found (NDF) phenomenon in which the defect is not reproduced or the cause of the defect cannot be identified in the subsequent investigation systems after the discovery of the defect in the product. The NDF phenomenon is a major problem when dealing with complex technical systems, and its consequences may be manifested in decreased safety and dependability and increased life cycle costs. Until now, NDF-related prior studies have been mainly focused on the NDF cost estimation, the cause and impact analysis of NDF in qualitative terms. And there have been no specific methodologies or examples of a working-level perspective to reduce NDF. The purpose of this study is to present a practical methodology for reducing NDF phenomena through data mining methods using quantitative data accumulated in the enterprise. In this study, we performed a cluster analysis using market defects and design-related variables of mobile devices. And then, by analyzing the characteristics of groups with high NDF ratios, we presented improvement directions in terms of design and after service policies. This is significant in solving NDF problems from a practical perspective in the company.

• Advances in concrete construction
• /
• 제16권1호
• /
• pp.69-78
• /
• 2023

This investigation delves into the adverse repercussions stemming from the impact of arsenic on steel pipes concealed within soil designated for rice cultivation. Simultaneously, the study aims to ascertain effective techniques for detecting arsenic in the soil and to provide strategies for mitigating the corrosion of steel pipes. The realm of nanotechnology presents promising avenues for addressing the intricate intersection of renewable energy, oil, and environmental pollution from a novel perspective. Nanostructured materials, characterized by distinct chemical and physical attributes, unveil novel pathways for pioneering materials that exert a substantial impact across diverse realms of food production, storage, packaging, and quality control. Within the scope of the food industry, the scope of nanotechnology encompasses processes, storage methodologies, packaging paradigms, and safeguards to ensure the safety of consumables. Of particular note, silver nanoparticles, in addition to their commendable antibacterial efficacy, boast anti-fungal and anti-inflammatory prowess, environmental compatibility, minimal irritability and allergenicity, resilience to microbial antagonism, thermal stability, and robustness. Confronting the pressing issue of arsenic contamination within both environmental settings and the food supply is of paramount importance to preserve public health and ecological equilibrium. In response, this study introduces detection kits predicated upon silver nanoparticles, providing an expeditious and economically feasible avenue for identifying arsenic concentrations ranging from 0.5 to 3 ppm within rice. Subsequent quantification employs Hydride Atomic Absorption Spectroscopy (HG-AAS), which features a detection threshold of 0.05 ㎍/l. A salient advantage inherent in the HG-AAS methodology lies in its capacity to segregate analytes from the sample matrix, thereby significantly reducing instances of spectral interference. Importantly, the presence of arsenic in the soil beneath rice cultivation establishes a causative link to steel pipe corrosion, with potential consequences extending to food contamination-an intricate facet embedded within the broader tapestry of renewable energy, oil, and environmental pollution.

• 방사성폐기물학회지
• /
• 제10권1호
• /
• pp.63-75
• /
• 2012

사용후핵연료 심지층처분장 부지선정과 최종 처분장부지의 처분적합성을 평가하는 업무는 시행-착오를 줄이고 기술적 신뢰성 확보와 합리적이고 효율적인 업무수행을 추구하여야 한다. 이에 선행하여, 우리나라에 적용 가능한 처분장부지의 지질환경 요건 설정을 위한 기본방향과 개별 인자의 처분적합성지표를 가능한 한 정량화하여 설정하고 업무에 적용하여야 한다. 사용후핵연료 처분장부지 선정과 최종처분장 부지의 안전성확보를 위한 처분요건과 관련하여 IAEA 및 OECD 회원국들과 처분연구 및 상용사업 수행 관련 선진국가들의 사례를 바탕으로 요건 별로 구분하여 현황을 분석하였다. 여기서는 사용후핵연료 처분장 부지로서 암석 암반이 갖추어야 할 충분 혹은 선호요건에 대한 이해 제고와 관련 세부 기술지침을 도출하는데 기여하고자 하였다. 이를 토대로 어떠한 암석 암반이 상대적으로 보다 유리한 조건을 가지는 선호요건으로 제시해야 하는지, 그리고 충분요건과 선호요건을 적용하여 후보부지 조사 선별평가 기간 동안 부지선정업무에 반영하고 평가하고 결정하여야 하는 방법론을 도출할 수 있도록 기본 골격을 제시하였다. 또한 처분안전성 확보를 위해 필요한 기본적인 사항을 검토하고 서술하였다. 본 논문에서 기술한 항목들은 처분안전성 확보를 위한 처분요건의 기술지침 구성 체계, 처분안전성 확보개념, 다중방벽 기능 조건, 천연방벽의 지질환경 기본요건, 그리고 우리나라에 적용 가능한 처분장부지 지질환경 기본요건(안) 등으로 구성된다. 우리나라의 사용후핵연료 심지층처분장 부지의 위치에 관한 사업자 기술지침 요건으로 제안하였다. 이와 관련하여 충분요건과 선호요건으로, 화산활동, 지진활동, 단층운동 융기 침강 운동 및 기후 해수면변동 등 장기지질안정성 요건을 비롯한 15개 충분요건과 48개 선호요건을 제안하였다. 이들 요건은 우리나라의 지질환경 특성을 충분히 반영하여 후속되는 각 부문별 특성에 적합한 정량적인 기술 기준 및 지침으로 개발되어야 할 것이다. 정량적 기술지침의 도출은 상용 처분장부지 선별평가과정 및 처분장 부지적합성평가 과정으로부터 확립될 수 있을 것이다. 또한 다양한 부문별 안전사례(safety case) 작성 혹은 연구용 지하처분연구시설 (underground research laboratory: URL)을 이용한 처분시스템의 실증과정 등을 통하여 객관적이고 신뢰성있는 정량적인 지침들이 확립될 수 있을 것이다.

• 대한영양사협회학술지
• /
• 제9권3호
• /
• pp.219-232
• /
• 2003

The purposes of this study were to assess the child care centers' foodservice facility, and to develop the kitchen facility model based on the general sanitation standards and guidelines in order to provide basic information for a plan review to build or renovate child care centers' foodservice facility. The scopes of the study include : 1) field assessment of the foodservice management practices and facilities in 8 public child care centers, and 2 private child care centers which they are subsidized from the government as public child care centers, 2) development of child care centers' kitchen facility model based on the General Sanitation Standards and Guidelines. The results of this study can be summarized as follows : 1. Field Assessment of the Child Care Centers' Foodservice Facility Average number of children in child care centers was 78.0$\pm$24.20, the average space of kitchen was 15.13$\pm$4.25($m^2$). Especially, the average space of kitchen was 18.49$\pm$4.35($m^2$) with enrollment capacity of 90～120 children in child care centers. The inventory level of most foods was relatively low except rice and kimchi. Kitchen facilities and equipments were similar to those of home kitchen and did not meet the standards of institutional practice. Therefore, the director in child care centers should recognize the importance of the sanitation management and pay more attention to the renovation of foodservice facilities as well as sanitation management practices. 2. Development of the Kitchen Facility Model based on the General Sanitation Standards and Guidelines The kitchen facility plan model with enrollment capacity of 100 children was developed based on the results of field assessment and literature review. Suggested kitchen space was 34.16$m^2$(6,100mm×5,600mm). This space was bigger than the results of field survey or precedent study, considered appropriate to implement the general sanitation standards. The main feature of the developed kitchen facility plan and model was product flow in one direction from the arrival of the raw material to the finished product in order to prevent cross contamination and to improve working efficiency.

• 한국산업보건학회지
• /
• 제24권3호
• /
• pp.359-364
• /
• 2014

Objectives: The principal aim of this study is to provide fundamental data for suggesting substantial management plan of personal air sampler by investigating current situation of work environment monitoring service provider. Materials and Methods: The questionnaires regarding a personal air sampler were sent by electronic mail to 150 institutions, except for 22 institutions which are out of business or closed temporarily, among total 172 domestic work environment monitoring service providers designated by Ministry of Employment and Labor based on 2013. The institutions which did not reply to the questionnaire for 30 days were required directly by phone call. Finally 97 institutions gave an answer to the questionnaire and therefore the respondence rate was 65%. Results: The normal operation rate of personal air sampler exceeded 70% in all the types (particle, gas and both combination) in terms of purchased year. Furthermore the personal air sampler purchased recently showed a trend of high operation rate compared to the personal air sampler purchased previously. The distribution patterns of personal air sampler In terms of manufacturers were Gillian>MSA>SKC for particle, Gillian>SKC>AMETEK for gas and Gillian>MSA>Casella for both combination, respectively. As a result, it was found that the personal air sampler manufactured by Gillian company was utilized the most in domestic work environment monitoring service provider regardless of types of personal air sampler. Conclusions: Based on the results obtained from this study, the normal operation rate according to types of personal air sampler was as follows: 94% for personal air sampler for collecting particle only, 93% for personal air sampler for collecting gas only and 89% for collecting both particle and gas. Overall, the numbers of personal air sampler possessed and operated normally in domestic work environment monitoring service provider were 5,458 and 5,062, which indicates the normal operation rate of personal air sampler in total aspect is 93%.

• 가정과삶의질연구
• /
• 제28권6호
• /
• pp.35-46
• /
• 2010

The purpose of the study was to identify the potential buyers' consciousness of single-family housing to provide useful data to help future single-family housing supplies in Ulsan. The study selected residents in Ulsan, who were over twenty and had an interest in living in a single-family housing. A survey was conducted from September 11, 2008 to September 25, 2008. The sample consisted of 364 persons who are currently live in Ulsan metropolitan area. The results are as following. About two thirds of the sample had the desire to live in a single-family housing. Moving into a single-family housing had financial preparation as the greatest issue. When moving into a single-family housing, the convenience of the residential district was the greatest consideration, whether or not it is a green environment, pollution level, etc. The potential buyers valued environment-friendly features and also had a very strong desire to own their own house. Many of them wanted to design and build their own single-family housing within a budget of 100-200 million KRW. In terms of the location, there was a higher preference for the riverside or lakeside rural areas outside the city. In terms of size, the preference was less than $330m^2$, which includes $99-132m^2$ for residential. When considering a single-family housing the direction was the most important feature, along with eco-friendly and safer materials and equipments. When building the single-family housing the potential buyers considered the community spaces first with a preference for having three bedrooms and two bathrooms. For the exterior, they wanted a unique shape of roof and there were high preferences for brown and beige colors. In terms of housing complexes, the potential buyers preferred individual unit types over complexes. If they preferred housing complexes, they wanted the cluster form complex with about 10-30 units. The complex also required a park-like setting with a guard system, which shows that convenience and safety were the most important features. In terms of complex management, they considered environmental management as the most important feature. The potential buyers were willing to pay belw 200,000 KRW, which showed their desire to minimize financial burdens.

• 한국항해항만학회지
• /
• 제39권6호
• /
• pp.465-472
• /
• 2015

선박온실가스 규제를 위한 SEEMP (Ship Energy Efficiency Management Plan) 기술 중 선박에너지절감을 위한 조치는 하드웨어적인 장비를 선박에 탑재하여 구현하거나, 인적교육 및 운항패턴 개선 등과 같은 소프트웨어적인 방식으로 구현 가능하다. 선체저항개선을 위한 기술 중 하드웨어적인 장비 개조를 통해 구현되는 기술은 현존선에 적용하는데 장비의 규모 등에 의한 제약이 발생한다. 반면 소프트웨어적인 에너지절감기술의 구현은 저렴한 도입비용과 하드웨어적인 방식에 비해 높은 에너지 절감효과를 보이며, 선종에 크게 구애받지 않고 적용이 용이하다는 장점을 가지고 있어 IT 기술을 이용한 선박에너지절감기술이 요구되어지고 있다. 본 논문에서는 IT 기반의 선박에너지절감 기술을 검증하기 위하여 대표적인 3개 선종에 대한 실선 모델링 기반의 선박조종시뮬레이터를 이용한 육상시험을 수행하였다. 시뮬레이터를 이용한 성능검증 방법은 6개의 다양한 환경조건에서 에너지절감기술 적용 전후의 운항결과로부터 에너지절감효과를 비교 분석하고, 해상상태에 따른 구간별 비교결과를 통해 IT기반 에너지절감시스템의 성능평가를 수행하였다. 벌크, 컨테이너, VLCC 선종을 이용한 육상시험 결과 컨테이너선의 연료절감률이 가장 크게 나타났고, 육상시험 대상선박 모두 선박에너지절감시스템 사용전과 비교하여 연료절감효과를 보였다.