• Proceedings of the KIEE Conference
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• 2009.04a
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• pp.213-215
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• 2009

본 연구에서는 화재시 재실자의 안전한 피난을 유도하는 피난유도시설의 설치기준과 지하철역사, 대형편의점(마트), 종합병원 등 의료시설, 학교 등 교육시설과 같은 불특정 다수의 사람이 이용하는 건축물에 설치된 피난 유도등의 현장적용사례와 유지관리 실태를 조사하였다. 이러한 건축물에서 재실자의 피난에 영향을 미치는 요소, 예상되는 인명 안전 등에 대하여 분석하여 문제점을 도출하였다. 본 연구결과는 기존의 소방시스템의 문제점으로 지적되고 있는 화재 발생 위치와 확산 경로에 관계없이 획일적으로 피난 방향을 표시하고 있는 시스템의 개선을 위한 최적의 피난 경로를 표시하는 인공지능형 방향성 유도등 개발에 활용할 것이다.

• IE interfaces
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• v.21 no.2
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• pp.161-169
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• 2008

Normally, suppliers have to decide on what, how much, and when to replenish stocks of goods based on a data flow generated by a vendor managed inventory(VMI) system. But information from supply chain is often misleading. It is common for such data to be distorted by a lack of coordination and synchronization across several business entities managing different supply chain operations. This phenomenon is called the 'bullwhip effect(BwE)'. Many researchers, working over many years, have studied the reasons for the BwE. They have proposed various remedies, but this phenomenon persists. Though overlooked in previous research, this paper reveals that the 'lot size' of a supply chain of distribution is indeed the main cause of the BwE. In addition, some problems in the existing methods of measuring the BwE are identified and a revised much improved method of measurement is suggested.

• Proceedings of the Korean Society of Computer Information Conference
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• 2010.07a
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• pp.521-523
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• 2010

현재 대형 마트에서 '미래형 매장(Future Store)' 을 구현하기 위하여 스마트 카트를 운영하고 있다. 스마트카트의 운영은 고객에게 물품의 정보, 해당 물품의 위치, 구매한 물품의 리스트 등 다양한 정보를 제공해주며 고객들에게 우수한 서비스를 제공한다. 하지만, 이런 스마트 카트는 큰 단점을 포함하고 있어, 많은 매장에 상용화 되기란 어려움이 예상된다. 이를 해결하기 위하여, 요즘 화제가 되고 있는 스마트폰을 이용하여 스마트 카트의 우수한 서비스를 제공하고자 한다.

• Journal of the East Asian Society of Dietary Life
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• v.26 no.6
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• pp.473-480
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• 2016

As the lifestyle of people today is evolving, the desire for convenient but nutritious food to replace home-cooked meals is increasing. As the market for Home Meal Replacement (HMR) has already reached 17 hundred billion Won, many studies on HMR selection attributes have been conducted, using traditional Importance-Performance Analysis (IPA). However, it was found that traditional IPA had some limitations. Therefore, the study used both traditional and the Revised IPA to examine the selection attributes of HMR sold at large discount store to compare outcomes. The results of the study show that by using the Revised IPA, many attributes differed from those found by the traditional IPA. Consequently, the study revealed aspects that have both linear and nonlinear relationships with customer satisfaction. Implications of this study could provide the foundation of business strategies for HMR manufacturers.

• Proceedings of the Korea Information Processing Society Conference
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• 2021.11a
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• pp.1136-1139
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• 2021

쇼핑카트 부착 모듈형 로봇 'Cart-Rider'는 어드미턴스 제어를 통한 사용자의 힘 보조 기능, 딥러닝을 활용한 네비게이션 기능, GPS 를 활용한 도난 방지 기능을 제공하는 로봇으로 대형 마트에서 발생하는 안전사고 및 쇼핑카트 도난을 예방하는 동시에 사용자에게 편의성을 제공하는 로봇이다. 또한 여러 대를 겹쳐서 보관하는 기존의 카트 시스템을 유지하고 탈부착이 용이하도록 하드웨어를 제작하여 환경에 영향을 주지 않고 유지 및 보수가 용이하도록 제작했다.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.10 no.6
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• pp.1214-1219
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• 2009

Many studies are being applied for various parts of USN (Ubiquitous Sensor Network) technology. The world's large retail stores and warehouses that apply logistic management are also studied. With this, USN technology is increasing in its utilization. However, to handle and process real-time data will never be never easy if these huge warehouses are using too many sensors, and real-time data correction is almost impossible. Software implementation and high-speed hardware are insufficient to solve these complex problems. To solve this problem, a key solution is to implement high-speed software. Hence, this paper suggests a USN logistics management system that applies pipelining techniques for efficiency in real-time data correction and reduces errors of generated values.

• Food Science and Preservation
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• v.19 no.1
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• pp.67-73
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• 2012

This study was carried out to investigate the packaging status of the $Agaricus$ $bisporus$ mushrooms and the benefits of storing them after precooling to improve their distribution system using small packages. The packaging status of the $Agaricus$ $bisporus$ mushrooms was surveyed at a farm, a department store, a wholesale market, and a supermarket from May to September 2011. The packaging materials that were used were PS, carton, PP, LDPE, PLA, and PVC. The harvested $Agaricus$ $bisporus$ mushrooms were precooled at $4^{\circ}C$ for three hours and were then stored at $20^{\circ}C$ for three days. The weight loss rate of the precooled sample was slightly lower than that of the unprecooled sample; conversely, the L value of the precooled sample was higher than that of the unprecooled sample. The ${\Delta}E$ value was lowest in the precooled sample after packaging. The precooling process effectively prolonged the shelf life and enhanced the quality of the$Agaricus$ $bisporus$ mushrooms.

• The Korean Journal of Food And Nutrition
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• v.22 no.3
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• pp.396-401
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• 2009

Microorganisms or their toxins can be transferred to eggs and cause food poisoning in humans. Therefore, this study was conducted to detect microbial contamination of eggs and to identify microorganisms in any contaminated eggs. Four different brands of eggs were collected from hypermarkets in the northern Gyeonggi area. The total bacterial counts on the shells of the eggs varied greatly between brands. In addition, various bacterial species including Klebsiella pneumoniae, Pseudomonas mendocina, Alcaligenes xylosoxidans, Alcaligenes faecalis, and Enterobacter cloacae were identified on eggshells. Furthermore, mean of total bacterial counts of four brands was $3.4{\times}10^4 cfu/m{\ell}$ and E. coli was detected on the eggshell of one brand egg. However, Salmonella was not identified on all brands of collected eggs. We also demonstrated that the E. coli isolated from the eggshell was not pathogenic based on the absence of pathogen-specific gene expression patterns. Taken together, the result of this study indicate that strict quality control and improved distribution controls are required to decrease microbial contamination and improve human health.

• Journal of the Korean Society of Food Science and Nutrition
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• v.34 no.10
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• pp.1566-1571
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• 2005

Consumer's perception and consumption pattern of fresh-cut agri-food Products were surveyed to Provide basic information for quality enhancement. The results are summarized as follows: The respondents had a preference for a discount store (60.5$\%$) to purchase fruits and vegetables and the frequency of purchase was one time Per week (46.1$\%$). Fruits and vegetables were purchased frequently by full-time housewives compared with workers. The reasons for purchasing fresh-cut agri-food generally resulted from a consideration of the saving in cooking time, the ease of handling and the desire to serve appropriate portions. On the other hand, the reasons for not purchasing fresh-cut agri-food Products were the comparatively high price, a perception of unsanitary handling. Freshness was considered to be the most important factor when purchasing these products. The preferred price for the fresh-cut agri-food products were approximately 110 $\∼$ 140$\%$ of that for the unprocessed products. 87.7$\%$ of respondents answered that they will purchase fresh-cut agri-food products continuously if some problems that they considered, would be improved.

• Journal of Food Hygiene and Safety
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• v.22 no.2
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• pp.105-109
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• 2007

This study monitored and compared the contamination levels of total aerobic bacteria, coliform groups and S. aureus of 16 Shrimp Jeotgal (Salt Fermented Shrimp) products from 3 traditional markets (TM), 3 department stores (DS) and 3 super markets (SM) located on seoul, Korea. Moreover this study was carried out to survey the concentrations of NaCl and heavy metal (lead; Pb) of the Shrimp Jeotgal. The contamination levels of total aerobic bacteria in the Shrimp Jeotgai were $3.35log_{10}CFU/g$ as a mean and $3.71log_{10}CFU/g$ for TM, $3.16log_{10}CFU/g\;for\;DS,\;2.84log_{10}CFU/g$ for SM. The coliform groups were contaminated in 50% of Shrimp Jeotgal and it means that the hygienic control is needed urgently. S. aureus were not detected in every sample. The levels of NaCl were between 17.9 and 28.5%. Heavy metal (lead; Pb) was detected in only 1 product at the level of 0.02 ppm out of 16 products. Although microbiological contamination levels of Shrimp Jeotgal were not much high, hygienic management like HACCP is thought to be needed for the production of Shrimp Jeotgal in traditional market.