• 한국경영과학회:학술대회논문집
• /
• 대한산업공학회/한국경영과학회 1996년도 춘계공동학술대회논문집; 공군사관학교, 청주; 26-27 Apr. 1996
• /
• pp.639-643
• /
• 1996

The manufacturing system has been changed from labored manual process system, which is managed and operated by managers and operators, to CIMS(Computer Integrated Manufacturing System) for integration of manufacturing, research, development and consumption in the age of diverse customer's needs[6]. However, because it involves the hierarchical system composed of many sub-systems interface and its installation & setup cost is very expensive, CIMS has many difficulties in constructing the durable optimal system that is able to adapt to rapid in-outer circumstance change. So, HMS(Holonic Manufacturing System), the new conceptual manufacturing system having the self-problem-solving and self-organization[11], is instructed to solve these difficulties that it has in these days. The system flexibility in the HMS is able to be ensured, with the integration of human's strong points into mechatronics manufacturing system to reduce interference among sub-systems. In this paper, the manufacturing process rationalization and integration of the assembly line in an automobile industry, has lots of problems in efficiency and productivity, has been studied in an early stage of converting the present state of process system to HMS, which is human-oriented processing system, to improve the line efficiency, system productivity and reliability by using human capability effectively. This paper is derived into the human-oriented & object-oriented holons settlement of the shop floor system composed of processing, assembly and material handling system for the future holonic manufacturing system, which is going to be computer supported control system.

• 복식문화연구
• /
• 제26권4호
• /
• pp.485-502
• /
• 2018

In this research, we conducted an empirical study using the theory of sociologist Jean Baudrillard to examine the phenomenon of contemporary people in Korea acquiring tattoos. The researcher classified the consumption behavior of modern society, as described by Baudrillard in The Consumer Society, into three keyword phrases: consumption by personal taste, coded consumption, and recyclage of consumption. Using this as the premise of the study, 18 men and women in their 20s and 30s completed questionnaires and interviews, and the results supported labeling tattoo consumption as consumption by personal taste, tattoos as coded consumption, and recyclage of tattoo consumption, similar to the consumption pattern that Baudrillard sees. First, the younger generations have consumed tattoos according to their personal preferences. They express themselves by tattooing for self-complacency, self-marking, pursuing individuality, overcoming the appearance complex, and seeking pleasure. Second, they have consumed socially coded tattoos. They say that tattoos domestically act as negative codes and symbolize individuals. Although tattoos are a symbol of artists who are relatively free from social norms, they are still a symbol of social misfits created as such by negative perceptions. Third, the pattern of tattoo consumption is like that of contemporary consumption. Tattoos already have become part of popular culture in Korea, and there has been a changing trend in tattoo culture. This study has significance in that tattoos were regarded as a consumption behavior that deviated, from the perspective of deviance. That phenomenon of today's tattoo culture of today was confirmed through the empirical study.

• 한국세라믹학회지
• /
• 제45권12호
• /
• pp.772-776
• /
• 2008

The Korea Electric Power Research Institute (KEPRI) has been developing planar solid oxide fuel cells (SOFCs) and power systems for combined heat and power (CHP) units. The R&D work includes solid oxide fuel cell (SOFC) materials investigation, design and fabrication of single cells and stacks, and kW class SOFC CHP system development. Anode supported cells composed of Ni-YSZ/FL/YSZ/LSCF were enlarged up to $15{\times}15\;cm^2$ and stacks were manufactured using $10{\times}10\;cm^2$ cells and metallic interconnects such as ferritic stainless steel. The first-generation system had a 37-cell stack and an autothermal reformer for use with city gas. The system showed maximum stack power of about $1.3\;kW_{e,DC}$ and was able to recover heat of $0.57{\sim}1.2\;kW_{th}$ depending on loaded current by making hot water. The second-generation system was composed of an improved 48-cell stack and a prereformer (or steam reformer). The thermal management subsystem design including heat exchangers and insulators was also improved. The second-generation system was successfully operated without any external heat source. Under self-sustainable operation conditions, the stack power was about $1.3\;kW_{e,DC}$ with hydrogen and $1.2\;kW_{e,DC}$ with city. The system also recuperated heat of about $1.1\;kW_{th}$ by making hot water. Recently KEPRI manufactured a 2kW class SOFC stack and a system by scaling up the second-generation 1kW system and will develop a 5kW class CHP system by 2010.

• Journal of Ecology and Environment
• /
• 제38권2호
• /
• pp.133-143
• /
• 2015

Freshwater macrophytes improve the structural heterogeneity of microhabitats in water, often providing an important habitat for zooplankton. Some studies have focused on the overall influence of macrophytes on zooplankton, but the effects of macrophyte in relation to different habitat characteristics of zooplankton (e.g., epiphytic and pelagic) have not been intensively studied. We hypothesized that different habitat structures (i.e., macrophyte habitat) would strongly affect zooplankton distribution. We investigated zooplankton density and diversity, macrophyte characteristics (dry weight and species number), and environmental parameters in 40 shallow wetlands in South Korea. Patterns in the data were analyzed using a self-organizing map (SOM), which extracts information through competitive and adaptive properties. A total of 20 variables (11 environmental parameters and 9 zooplankton groups) were patterned onto the SOM. Based on a U-matrix, 3 clusters were identified from the model. Zooplankton assemblages were positively related to macrophyte characteristics (i.e., dry weight and species number). In particular, epiphytic species (i.e., epiphytic rotifers and cladocerans) exhibited a clear relationship with macrophyte characteristics, while large biomass and greater numbers of macrophyte species supported high zooplankton assemblages. Consequently, habitat heterogeneity in the macrophyte bed was recognized as an important factor to determine zooplankton distribution, particularly in epiphytic species. The results indicate that macrophytes are critical for heterogeneity in lentic freshwater ecosystems, and the inclusion of diverse plant species in wetland construction or restoration schemes is expected to generate ecologically healthy food webs.

• 한국콘텐츠학회논문지
• /
• 제16권7호
• /
• pp.504-512
• /
• 2016

본 연구는 뮤지컬 배우의 공연 후 배역 투사와 그 후유증 양태를 파악하여 제도적인 치유 시스템을 모색하기 위해 실시되었다. 우리나라 정상급 남녀 뮤지컬 배우 22명을 상대로 심층 인터뷰를 하여 분석한 결과, 배우들은 대부분 공연 후 1개월 이상 장기간 배역 투사에 시달리며 우울증 등의 후유증으로 고통 받고 있으며, 치유도 전문가 상담을 회피한 채 자기진단에 따라 기분전환에 의존하고 있는 것으로 나타났다. 투사는 극중 주인공, 부정적 현실적 캐릭터 연기, 격한 감정을 표출할 때 특히 두드러졌다. 연구 결과는 배우들의 생생한 제언처럼 케이컬처 시대의 수준에 맞게 배우가 출연 전후 배우 친화적인 전문가의 상담 치료를 받도록 입법을 하고 재원을 조성해 민간에 배우전문 케어센터를 구축해야 한다는 점을 암시한다.

• 노동경제논집
• /
• 제40권3호
• /
• pp.29-55
• /
• 2017

본 연구는 주관화된 지표와 객관화된 지표로 구성된 장년근로자의 건강변수가 근로보수에 미치는 영향을 분석하고 있다. 근로보수는 화폐적 요소인 임금수준과 비화폐적 요소인 작업조건을 대변해 주는 사업장 안전지표인 산업재해 여부로 구성된다. 장년근로자의 객관화되고 주관화된 건강요소들이 근로사업장의 물리적이고 조직적인 근무환경과 결합되어 생산성을 반영하게 되는 임금수준과 재해 발생에 미치는 효과는 성별 연령별로 뚜렷한 차이로 나타난다. 특히, 장년근로자의 정신적 건강문제는 임금수준이 높을수록 크게 나타난다. 신체적인 손상, 만성질환 등 질병을 경험한 장년근로자는 재해위험에 더 노출되어 있으며 보상임금도 낮다. 따라서 장년근로자들의 건강수준 격차에 따른 근로보상 차이가 커짐에 따라 사업장 근로여건 개선과 일자리 보호에 대한 취약성을 보완하여 전직지원서비스나 기업의 주도적인 은퇴설계 프로그램의 활성화와 국가 차원의 제도 지원이 요청된다.

• 정보교육학회논문지
• /
• 제13권4호
• /
• pp.451-459
• /
• 2009

정보통신기술의 급격한 발달은 새로운 정보와 지식의 양을 급속하게 증가시켜 지식기반사회로의 체제를 굳건히 만들고 있다. 지식기반사회에서 전통적 교수-학습 방법은 더 이상 학습자의 문제해결에 도움을 주기 어렵다. 이런 이유 때문에 전통적 교수-학습 방법을 대신할 수 있는 지식기반사회의 적합한 수업모형인 문제중심학습이 대두되고 있다. 본 논문에서는 e-러닝과 PBL(문제기반학습)을 결합시킨 수업모형인 온라인 기반의 e-PBL을 제안한다. 이는 전통적인 교수-학습 방법의 문제점을 극복할 수 있다. 따라서 본 논문에서는 초등학교 정보소양교육 분야에서 활용할 수 있는 e-PBL 수업모형, 수업문제를 개발하고 이를 실제 교육현장에 적용하여 타당성과 효과성을 검증하였다. 또한 e-PBL을 지원하기 위한 e-PAS 시스템을 구축하여 학업성취도 및 자기주도적 학습능력을 향상시키고 학습만족도를 신장시켰다.

• Journal of Advanced Marine Engineering and Technology
• /
• 제38권5호
• /
• pp.589-601
• /
• 2014

Natural gas hydrate (NGH) is emerging as a new eco-friendly source of energy to replace fossil fuels in the 21st century. It is well known that the Natural Gas Hydrate contains large amount of natural gas about 170 times as much as its volume and it is easy to be stored and transported safely at about $-20^{\circ}C$ under atmospheric pressure due to so called "self-preservation effect". The option of gas transport by gas hydrate pellets carrier has been investigated and developed in various industry and academy. The natural gas hydrate pellet carrier is on major link in a potential gas hydrate process chain, starting with the extraction of natural gas from the reservoir, followed by the production of hydrate pellets and the transportation to an onshore terminal for further processing or marketing. In recent years, Korean project team supported by Korean Government has been working on the development of NGH total systems including novel NGH carrier since 2011. In order to increase the knowledge on the NGH pellet carrier developed and to understand the major hazards that could have significant impact on the safety of the vessel, this paper presents and evaluates the pros and cons of cargo holds, loading and unloading systems through the analysis of current patent technology. Based on the proven and well-known technologies as well as potential measures to mitigate sintering and minimize mechanical stress on the hydrate pellet in the self-preservation state, this study presents the conceptual and basic design for NGH carrier.

• Journal of Power Electronics
• /
• 제16권5호
• /
• pp.1869-1883
• /
• 2016

In recent years, some converter structures and analyzing methods for the voltage regulation of stand-alone self-excited induction generators (SEIGs) have been introduced. However, all of them are concerned with the three-phase voltage control of three-phase SEIGs or the single-phase voltage control of single-phase SEIGs for the operation of these machines under balanced load conditions. In this paper, each phase voltage is controlled separately through separated converters, which consist of a full-bridge diode rectifier and one-IGBT. For this purpose, the principle of the electronic load controllers supported by fuzzy logic is employed in the two-different proposed converter structures. While changing single phase consumer loads that are independent from each other, the output voltages of the generator are controlled independently by three-number of separated electronic load controllers (SELCs) in two different mode operations. The aim is to obtain a rated power from the SEIG via the switching of the dump loads to be the complement of consumer load variations. The transient and steady state behaviors of the whole system are investigated by simulation studies from the point of getting the design parameters, and experiments are carried out for validation of the results. The results illustrate that the proposed SELC system is capable of coping with independent consumer load variations to keep output voltage at a desired value for each phase. It is also available for unbalanced consumer load conditions. In addition, it is concluded that the proposed converter without a filter capacitor has less harmonics on the currents.

• 패션비즈니스
• /
• 제14권4호
• /
• pp.1-9
• /
• 2010

The study verified the regulatory fit effect of the message focus and propensity regulatory focus delivered in the sales promotion situation of beauty services and products on the basis of the self-regulatory focus theory being actively discussed in the consumer behavior area of marketing. As the result of ANOVA analysis on the experimental design 2 (chronic regulatory focus: promotion focus/prevention focus, between factor) ${\times}$ 2 (message regulatory focus: promotion focus/prevention focus, within factor), the promotion focus group showed more positive response to the promotion focus message(4.88) of beauty services than the prevention focus group(4.40) so that the effect of regulatory fit appeared(t=1.79, p<.1), but the regulatory fit effect didn't appear in the prevention focus message(t=.58, p>.1) so that the hypothesis was partially supported. However, as for the promotion focus message of beauty products, the promotion focus group(4.62) showed more positive response than the prevention focus group(4.16), and as for the prevention focus message, the prevention focus group(4.89) showed more positive results than the promotion focus group(4.33) so that the effect of regulatory fit appeared(t=2.07, p<.05). Therefore, the result of the study shows that as for the service consumers perceive high risk, the sales promotion activity of the prevention focus message can be effective for prevention focus consumers and for promotion focus consumers as well. Otherwise, it suggests the marketing approach that the consumer evaluation is more positive when the advertising message focus fit the consumer regulatory focus.