• 한국의상디자인학회지
• /
• 제5권1호
• /
• pp.97-107
• /
• 2003

This study was conducted to provide the basic data to activate the consigned education of fashion retailing company in the department of fashion design in a junior college. 36 consigned education students from fashion retailing company in Daegu were surveyed and interviewed. The result can be summarized as follows: 1. Their motives of study lie in ‘I wanted to study in a junior college’ (55.6%), ‘It would be some help for my job’. ‘My company recommended’ (16.7%), and ‘I wanted to get a higher degree’ (11.1%). 2. Their preferences in terms of major and subjects lie in ‘fashion marketing’ (30.6%), ‘fashion coordination’ (25.0%), and ‘fashion information’ (19.4%). 3. The occupations they wanted to get are ‘a displayer’ (38.9%), and ‘a shop master’ (30.6%), and ‘a merchandiser’ (8.3%). 4. The ratio of theories to practices they want is ‘40:60ㆍ30:70’ (27.8%), ‘50:50’ (22.2%), ‘20:80’ (11.1%) 5. With regard to their adaptability in school, they answered that ‘I'm doing quite well’ (44.4%), ‘I'm doing OK’. ‘It's a little hard to follow’ (22.2%) 6. About teaching methods and contents, they responded that they want ‘more emphasis on practices’ (41.7%), and they commented that ‘teachers are focused on the syllabus procedure rather than students’ practical improvement’ (19.4%), and ‘I feel loaded with too much assignment’ (13.9%) 7. They wanted to be taught by ‘professors’ (77.8%) and ‘professionals in the field’ (19.4%) In conclusion, it is required that both the college and the company need to develop a customized education program focusing on the field training specialized by their cooperation and constant researches. On the part of junior colleges, adjusting their educational directions to the trend of the 21st century, they need to focus on nurturing the consigned students to be highly qualified professionals required by the industry, using hi-tee equipment and facilities through academic and industrial cooperation.

• 한국융합학회논문지
• /
• 제9권6호
• /
• pp.69-75
• /
• 2018

제조업에 있어 공정의 효율성은 제품의 경쟁력과 직결되는 중요한 요소이다. 특히 최근 여러 국가와 FTA체결로 인해 국내외 제조업이 치열한 경쟁에 직면함에 따라 생산시간을 보다 단축하기 위한 정교한 작업관리 시스템이 요구되고 있다. 본 연구에서는 동작분석 솔루션을 활용하여 제조공정의 효율성을 제고하는 방안을 모색하고자 한다. 동작분석 솔루션을 활용하여 최적화 검증 후 제조공정을 개선할 경우 추가적인 공정 수정 또는 보완에 소요되는 비용을 절감할 수 있으며, 기업의 생산성 향상이라는 실질적 효과를 도출할 수 있다. 본 연구를 통해 작업현장의 낭비개선, 작업편성효율개선, 기종교체시간 단축, 표준시간 측정 및 작업시스템 표준화 등을 구현할 수 있다.

• Journal of Preventive Medicine and Public Health
• /
• 제48권6호
• /
• pp.330-341
• /
• 2015

Objectives: Emergency medical personnel (EMPs) are pre-hospital emergency responders who are at risk of exposure to infections and may also serve as a source for the transmission of infections. However, few studies of infection control have specifically addressed EMPs in the Republic of Korea (hereafter Korea). The goal of this study was to assess the current status of infection prevention and control programs (IPCPs) for EMPs in Korea. Methods: A cross-sectional survey was conducted to quantitatively assess the resources and activities of IPCPs. A total of 907 EMPs in five metropolitan cities completed a structured questionnaire from September 2014 to January 2015. The data were analyzed using descriptive statistics, multi-response analysis, and the chi-square test. Results: The mean age of the participants was $34.8{\pm}15.1years$. IPCPs were found to have weaknesses with regard to the following resources: the assignment of infection control personnel (ICP) (79.5%), hand hygiene resources such as waterless antiseptics (79.3%), the use of paper towels (38.9%), personal protective equipment such as face shields (46.9%), and safety containers for sharps and a separated space for the disposal of infectious waste (10.1%). Likewise, the following activities were found to be inadequately incorporated into the workflow of EMPs: education about infection control (77.5%), post-exposure management (35.9%), and the decontamination of items and spaces after use (88.4%). ICP were found to have a significant effect on the resources and activities of IPCPs (p<0.001). The resources and activities of IPCPs were found to be significantly different among the five cities (p<0.001). Conclusions: IPCPs for EMPs showed some limitations in their resources and activities. IPCPs should be actively supported, and specific IPCP activities for EMPs should be developed.

• KSII Transactions on Internet and Information Systems (TIIS)
• /
• 제11권7호
• /
• pp.3370-3392
• /
• 2017

Next Generation Beyond 4G/5G systems will rely on the deployment of small cells over conventional macrocells for achieving high spectral efficiency and improved coverage performance, especially for indoor and hotspot environments. In such heterogeneous networks, the expected performance gains can only be derived with the use of efficient interference coordination schemes, such as Fractional Frequency Reuse (FFR), which is very attractive for its simplicity and effectiveness. In this work, femtocells are deployed according to a spatial Poisson Point Process (PPP) over hexagonally shaped, 6-sector macro base stations (MeNBs) in an uncoordinated manner, operating in hybrid mode. A newly introduced intermediary region prevents cross-tier, cross-boundary interference and improves user equipment (UE) performance at the boundary of cell center and cell edge. With tools of stochastic geometry, an analytical framework for the signal-to-interference-plus-noise-ratio (SINR) distribution is developed to evaluate the performance of all UEs in different spatial locations, with consideration to both co-tier and cross-tier interference. Using the SINR distribution framework, average network throughput per tier is derived together with a newly proposed harmonic mean, which ensures fairness in resource allocation amongst all UEs. Finally, the FFR network parameters are optimized for maximizing average network throughput, and the harmonic mean using a fair resource assignment constraint. Numerical results verify the proposed analytical framework, and provide insights into design trade-offs between maximizing throughput and user fairness by appropriately adjusting the spatial partitioning thresholds, the spectrum allocation factor, and the femtocell density.

• 터널과지하공간
• /
• 제25권3호
• /
• pp.221-230
• /
• 2015

본 연구에서는 국내외에서 개발된 광산관리 소프트웨어들을 조사하고 그 특징을 분석하였다. 해외에서는 다수의 기업들이 Dispatch, $Cat^{(R)}$ $MineStar^{TM}$, FARA 등과 같은 광산관리 소프트웨어를 개발하고 상용화하였다. 이 소프트웨어들은 실시간 장비 추적, 장비 할당 최적화, 생산량 관리, 장비 상태 모니터링, 원격조종과 같은 기능을 제공한다. 국내에서는 현재까지 상용화된 광산관리 소프트웨어는 없다. 일부 연구자들에 의해 GEMISIMS, Truck-Shovel fleet optimization 등의 소프트웨어가 개발되었으나, 다소 제한적인 기능만을 제공하고 있다. 추가적으로 본 논문에서는 보츠와나 Jwaneng 광산과 미국 Robinson 광산에서 광산관리 소프트웨어를 도입하여 활용한 사례를 조사하여 그 결과를 제시하였다.

• 한국우주과학회:학술대회논문집(한국우주과학회보)
• /
• 한국우주과학회 2004년도 한국우주과학회보 제13권2호
• /
• pp.347-350
• /
• 2004

A space radiation analysis has been used to evaluate an ability of electronic equipment boxes or spacecrafts to endure various radiation effects, so it helps design thicknesses of structure and allocate components to meet the radiation requirements. A comparison study of space radiation dose analysis programs SPENVIS Sectoring Tool (SST) and SIGMA II is conducted through some structure cases, simple sphere shell, box and representative satellite configurations. The results and a discussion of comparison will be given. A general comparison will be shown for understanding those programs. The both programs use the same strategy, solid angle sectoring with ray-tracing method to produce an approximate dose at points in representative simple and complex models of spacecraft structures. Also the particle environment data corresponding to mission specification and radiation transport data are used as input data. But there are distinctions between them. The specification of geometry model and its input scheme, the assignment of dose point and the numbers, the prerequisite programs and ways of representing results will be discussed. SST is a web-based interactive program for sectoring analysis of complex geometries. It may be useful for a preliminary dose assessment with user-friendly interfaces and a package approach. SIGMA II is able to obtain from RSICC (Radiation Safety Information Computational Center) as a FOR-TRAN 77 source code. It may be suitable for either parametric preliminary design or detailed final design, e.g. a manned flight or radiation-sensitive component configuration design. It needs some debugs, recompiling and a tedious work to make geometrical quadric surfaces for actual spacecraft configuration, and has poor documentation. It is recommend to vist RSICC homepage and GEANT4/SSAT homepage.

• 한국유체기계학회 논문집
• /
• 제19권4호
• /
• pp.48-53
• /
• 2016

The centrifugal separator which uses gravity separation method for oil-water separation, rotating at high-speed, is one of the most commonly used device for controlling the amount of the oil in waste water collected in bilge. The IMO (International Maritime Organization) has set regulations, also known as MARPOL 73/78, for the prevention of marine pollution. In addition, DET NORSKE VERITAS (DNV) has set standards regarding the assignment of Environmental Class Notation, CLEAN or CLEAN DESIGN, of ships. One of the requirements for classification is that in addition to conforming to MARPOL 73/78, more stringent measures must be taken as well. One of these measures is to limit the oil concentration in bilge water to less than 5ppm. So in this study, an Oil-Water Separator (OWS) is used together with multiple separating plates as a filtration system to be used as an oil-water separation device. The OWS operates using centrifugal separation in which the mixture is separated by centrifugal forces. The main purpose of this paper is to present the OWS separation efficiency according to the rotation speed, mass-flow rate, the angle and the number of stacked layers of the laminated plate using Computational Fluid Dynamics (CFD). Improvements to the device will be investigated from these results.

• 한국문헌정보학회지
• /
• 제40권4호
• /
• pp.85-110
• /
• 2006

최근 세계 각 지역에서 지진과 태풍 및 쓰나미와 같은 각종 재난과 재해에 관한 뉴스가 보도되는 가운데 우리나라에서도 역시 지진이나 테러 등의 영역에서 자유롭지 못한 것으로 여겨진다. 도서관 역시 많은 이용자가 출입하는 장소로 각종 재난의 대책을 미리 준비하여야할 기관이다. 이에 연구자는 서울. 대전, 전북지역의 공공도서관 75곳을 대상으로 비상시 재난대책에 관한 현 실정을 분석하였다. 각 도서관마다 재난의 유형별 발생 원인과 복구방안 등을 검토하였고, 도서관 운영 중 재난관리상의 요소와 시설 및 장비요구 인적담당요원의 고용과 배정실태 및 이용자를 위한 안전강좌의 시행과 교육방법등 4가지요소를 기초로 면밀히 조사 분석하였다. 검토 후 각 요소별에 따른 문제점 분석과 함께 그 해결방안 및 미래 재난대책을 위한 개선점과 제안점 등을 정리하였다.

• 한국정보통신학회:학술대회논문집
• /
• 한국해양정보통신학회 2011년도 추계학술대회
• /
• pp.479-482
• /
• 2011

본 논문에서는 선박 네트워크의 생존성과 효율성을 기반으로 선박 백본 네트워크의 설계 기법을 제안하였다. 현재 선박 네트워크의 표준은 IEC에서 담당하고 있으며 네트워크 생존성을 다루고 있는 표준 명세 IEC 61162-410은 이중화로 설계된 선박 네트워크가 존재한다는 가정하에 단말 기기가 이중화 네트워크를 통해 중복 프레임을 전송하여 선박 네트워크의 고생존성을 제공하기 때문에 이와 관련된 기존의 연구는 매우 미비하다. 이에 본 논문에서는 이중화 선박 백본 토폴로지 구조에 대하여 분석한 다음, 정수 선형 계획법을 사용한 선박 백본 네트워크의 최소 비용 배치 기법을 제안하였다. 그리고 정수 선형 계획 기법과 메타 휴리스틱 기법, 휴리스틱 알고리즘을 이용하여 배치된 선박백본 네트워크에서 효율적인 트래픽 할당 기법을 제안하였다. 설계한 이중화 선박 백본 네트워크의 설계 기법을 시험한 결과, 네트워크의 생존성 및 비용 효율적인 선박 네트워크의 배치와 트래픽 할당에 우수한 성능을 확인하였다.

• 한국항해항만학회:학술대회논문집
• /
• 한국항해항만학회 2023년도 춘계학술대회
• /
• pp.59-60
• /
• 2023

컨테이너 터미널의 자동화는 항만 경쟁력을 좌우하는 중요한 요소로 글로벌 선진항만은 컨테이너 터미널 자동화를 통해 경쟁력을 강화하는 추세이다. 자동화 터미널의 필수 이송 장비인 AGV의 운영 효율화는 자동화 터미널의 생산성을 제고할 수 있다. 자동화 컨테이너 터미널에서의 AGV 운영은 기존 컨테이너 터미널의 이송 장비 운영과는 다르게, 지정된 경로에 따라 주행하는 등 자동화 시스템을 기반으로 운영되어 작업부하 및 교착, 충돌 등과 같은 문제들을 고려하여야 한다. 이러한 요소들을 방지하고 AGV 운영 효율화를 지향하기 위해서는 보다 정교한 모델이 필요하다. 따라서, 본 논문에서는 터미널 내 AGV 주행경로 및 작업 배정 상황을 고려한 AGV 스케줄링 모형을 제안한다. 해당 모형은 교착 상황에 대한 문제를 예방하고 AGV 대수 및 작업 개수 변경으로 다양한 Case를 생성해 AGV 주행상황을 만들어 알고리즘과 최적해 분석을 통해 제안한 알고리즘을 평가한다.