• 한국경영과학회지
• /
• 제23권3호
• /
• pp.91-108
• /
• 1998

Automated Storage and Retrieval Systems (AS/RSs) are an important facility for modern material management. The expected benefits of these capital-intensive facilities are gained when their control policies and their physical design parameters are determined simultaneously. In this paper we present several analytical models that capture the impact of the storage assignment policy and of the rack design on the expected storage and retrieval times. Sequential and interleaved service modes are considered for sequencing the storage and retrieval requests. We further investigate the impact of the rack structure on the relative performance of the following storage assignment policies : closest open location (random), full turnover-based policy, and class-based. Our analysis clearly indicates that significant savings in crane travel time are realized when implementing full turnover-based policy, rather than random. These savings become more and more pronounced as the profile of the storage racks approaches the square-in-time shape. Furthermore, it is shown that a class-based policy, with a small number of storage classes, will capture most of these savings and be easier to manage in practice.

• 대한지역사회영양학회지
• /
• 제5권1호
• /
• pp.100-108
• /
• 2000

Seven constructs of sanitary management :time temperature, storage, cross-contamination, personal hygiene, equipment facility and documentation management were evaluated to investigate the perceived performance of sanitary management for school food service managers, Using a four-part questionnaire containing the seven constructs of sanitary management HACCP program, demographic information and characteristics of food service facilities participants rated their self-perceptions regarding sanitary management. Of the 550 possible respondents, 248(45.1%) completed the study. For the perceived sanitary manage-ment variables, the participants rated them between 2.66 and 4.16(5-point Likert scale). Temperature management presented the lowest performances while storage management showed the highest. The number of years of work experience of the food service managers and the serving location correlated significantly to sanitary management variables. Documentation management was also highly correlated to the other sanitary management constructs. The respondents ranked the managers leadership and professional knowledge regrading HACCP as most important, followed by the facilitys supporting equipment and human resources second, to successfully implement the HACCP system at the school food service facilites, Awareness of this study indicating low performance on temperature management suggests an active training program is needed for sanitary management of school food service.

• 한국융합학회논문지
• /
• 제8권7호
• /
• pp.29-37
• /
• 2017

연구망은 상용망과 비교하여 유연한 네트워크 엔지니어링 및 설계 등의 강점을 갖는다. 본 논문은 이러한 연구망의 특성에 기반하여 일반 망 사용자들과 분산된 지역의 첨단 망 사용자들을 동시에 지원하는 스토리지 클라우드 서비스 모델을 제안한다. 첨단 백본 망에 연결된 다수 지역을 적용하기 위해 오픈스택 Swift 서비스의 복수 프락시 컨트롤러를 활용하여 제안 서비스 모델을 프로토타이핑 한다. 망 지연 및 전송 데이터 크기의 영향과 관련한 실험에서 10ms 범위 내의 망 지연이 발생하는 첨단 백본 망에서는 데이터 크기가 상대적으로 큰 데이터가 작은 데이터보다 선호되는 것을 볼 수 있었고, 이것은 큰 데이터에서의 처리 감소율이 작은 데이터에 비해 상대적으로 작은 것에 기인한다. 이러한 실험 결과는 제안 모델이 중앙 지역에서 서비스의 접근 빈도가 잦은 일반 사용자들뿐만 아니라 간헐적으로 대용량 데이터를 전송하기 위해 서비스에 접근하는 첨단 망 사용자들에게도 적합하다는 것을 보여준다.

• 한국동물위생학회지
• /
• 제40권1호
• /
• pp.35-40
• /
• 2017

In order to find a way to reduce histamine formation when storing salted mackerel at home, a series of experiments were carried to monitor the time-related changes of histamine content, total aerobic bacteria and coliform quality of mackerel marketed in Incheon by the type of storage containers (clean, zipper and vacuum bag) during storage at $4^{\circ}C$, $24^{\circ}C$ and $-20^{\circ}C$ for 10 days. Histamine formation was continuously increased with passing time during storage at $4^{\circ}C$, whereas it was decreased after 3 days during storage at $24^{\circ}C$. The initial value of histamine was maintained during storage at $-20^{\circ}C$ for 10 days. During storage at $4^{\circ}C$, total aerobic bacteria and coliform showed a tendency to increased rapidly till 3day and then decreased gradually. The formation of histamine was increased in the order of vacuum bag$4^{\circ}C$.

• Asian Journal of Innovation and Policy
• /
• 제12권3호
• /
• pp.277-303
• /
• 2023

The importance of ecosystem service such as green spaces has risen due to restrictions on outdoor activities amid the climate crisis and COVID-19. While gardens significantly impact economic development, quality of life, and social well-being, comprehensive studies on their multidimensional values are lacking. This research categorizes garden values into social, cultural, environmental, and health dimensions and proposes an integrated assessment framework that introduces detailed elements and evaluation methods. An empirical assessment of carbon storage index in two Korean gardens, Semiwon and Juknokwon, reveals Semiwon's higher carbon storage per unit area. The proposed framework, emphasizing a quantitative approach, enables cross-national and regional comparisons, contributing to a broader understanding and evaluation of garden values beyond specific facilities.

• 정보처리학회논문지:컴퓨터 및 통신 시스템
• /
• 제3권12호
• /
• pp.433-442
• /
• 2014

분산 파일시스템의 클라이언트 측에 SSD 장치를 캐시 장치로 사용하여 분산 파일시스템의 읽기 성능을 향상시키고, Back-end 데이터 서버의 부하를 줄일 수 있다. 이러한 성능 향상을 통하여 기존의 대용량 스토리지 지원만이 가능했던 분산 파일시스템의 적용 분야를 고성능이 필요한 분야로 확장할 수 있다. 본 논문은 국내에서 개발된 분산 파일시스템인 MAHA-FS에 클라이언트 측의 SSD 캐시를 적용하여 가상 데스트톱의 입출력 성능을 향상시킬 수 있음을 보여준다. 실험 결과 NFS에 비해 가상 머신 이미지 배포 시간은 2배 이상, 부팅 시간은 3배 이상 향상시킬 수 있음을 알 수 있다.

• 한국방사성폐기물학회:학술대회논문집
• /
• 한국방사성폐기물학회 2018년도 춘계학술논문요약집
• /
• pp.90-91
• /
• 2018

• 한국주거학회논문집
• /
• 제13권5호
• /
• pp.51-58
• /
• 2002

The purpose of this study is to examine residents' perception and needs for storage according to the family life cycle. In order to achieve our goal, the questionnaire survey is used. We sample the questionnaire surveys of 250 apartment households in Seoul. The data collect by the questionnaire survey was analyzed by examining the frequency, percentage on the SPSS/PC+ Statistics package. The results of the study are obtained as follows: 1) In research on the actual storage condition, residents tend to feel constraint on storage of the season goods and the storage satisfaction on the service area is founded lowest. Therefore, it is needed more efficient space plan on the balcony storage and the interior storage for the season goods. 2) In research on the storage consciousness and attitude, residents tend to keep the goods of no use and prefer to arrange neatly rather than use conveniently. Therefore, it is needed more efficient space in the balcony for the storage of the goods of no use and the colsed furniture rather than the open furniture is suited for arrangement. 3) In research on the storage needs, needs for the built-in furniture in all family life cycle show highly and residents want to a space for the exclusive use of the storage. In a solution, we propose to equip with the interior storage and the exterior cooperative storage

• Parasites, Hosts and Diseases
• /
• 제58권2호
• /
• pp.191-194
• /
• 2020

Free-living amoebas (FLAs) can cause severe disease in humans and animals when they become infected. However, there are no accurate survey reports on the prevalence of FLAs in Korea. In this study, we collected 163 tap water samples from buildings, apartments, and restrooms of highway service areas in 7 Korean provinces with high population density. All these buildings and facilities have water storage tanks in common. The survey was separated into categories of buildings, apartments, and highway service areas. Five hundred milliliters of tap water from each building was collected and filtered with 0.2 ㎛ pore filter paper. The filters were incubated in agar plates with heated E. coli at 25℃. After axenization, genomic DNA was collected from each FLA, and species classification was performed using partial 18S-rDNA PCR-sequencing analysis. We found that 12.9% of tap water from buildings with storage tanks in Korea was contaminated with FLAs. The highway service areas had the highest contamination rate at 33.3%. All of the FLAs, except one, were genetically similar to Vermamoeba vermiformis (Hartmannella vermiformis). The remaining FLA (KFA21) was very similar to Acanthamoeba lugdunensis (KA/E26). Although cases of human infection by V. vermiformis are very rare, we must pay attention to the fact that one-third of tap water supplies in highway service areas have been contaminated.

• 정보보호학회논문지
• /
• 제22권1호
• /
• pp.131-139
• /
• 2012

클라우드 스토리지는 사용자들로 하여금 저장장치를 소유하는 대신 서비스의 형태로 빌려서 사용하고 사용량만큼만 비용을 지불하게 하므로 자체 데이터 센터를 유지하는 것보다 유리한 측면이 많이 있다. 그렇지만 공용 클라우드로 스토리지를 서비스하면 사용자 데이터에 대한 접근을 소유자가 통제하기 어렵기 때문에 데이터에 대한 기밀성을 보장하지 못하는 문제가 발생된다. 본 논문에서는 공용 클라우드 스토리지에 저장되는 사용자 데이터에 대하여 기밀성을 보장하기 위한 목적으로 클라우드와 사용자 사이에 동작하는 게이트웨이를 제안한다. 이 게이트웨이는 사용자의 개입없이 데이터를 암호화 혹은 복호화하여 전달하며, 다른 게이트웨이를 통한 접근을 보장할 수 있도록 암호 키를 교환하는 기능도 제공한다. 제시된 방법을 상용 클라우드 서비스에서 시험한 결과 안전성과 호환성을 만족할 수 있음을 확인하였다.