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400 nm급 폴리에스터 해도형 초극세사 편성물의 감량 및 염색 특성
박영기,조아라,이정진,Park, Young Ki,Jo, A Ra,Lee, Jung Jin 한국섬유공학회 2015 한국섬유공학회지 Vol.52 No.5
The weight reduction and dyeing properties of circular-knitted fabrics, fabricated from sea-island-type polyethylene terephthalate (PET) ultramicrofiber with a single fiber that is approximately 400 nm in diameter, were investigated. It was found that the dissolution ratio was dependent on the process temperature and the concentration of the sodium hydroxide (NaOH) solution used during alkali treatment. The use of a penetrating agent reduced the dissolution rate when using a 1 wt% NaOH solution, but accelerated the dissolution when using a 2 wt% NaOH solution. The dissolution ratio reached its theoretical maximum when the fabric was treated at $95^{\circ}C$ for approximately 40-50 min with a 1 wt% NaOH solution and for approximately 15-20 min with a 2 wt% NaOH solution. Under these treatment conditions, a large number of the sea components were dissolved, although some island components were not separated even in the case of treatment at $95^{\circ}C$ for 50 min with a 1 wt% NaOH solution, as monitored by scanning electron microscopy (SEM). The use of a cationic dye staining method also allowed for observation of the dissolution behavior. The color yield of the disperse dye on the alkali-treated fabric was dependent on the dyeing temperature, and the K/S value decreased as the dyeing temperature increased from $110-130^{\circ}C$. The build-up property of the fabric was generally good, the wash fastness was very poor to poor, and the light fastness was poor to fair.
Vision Tracking을 이용한 주행 차량의 교통정보 산출 기법
박영기,임상일,조익현,차재상,Park, Young ki,Im, Sang il,Jo, Ik hyeon,Cha, Jae sang 한국ITS학회 2020 한국ITS학회논문지 Vol.19 No.5
Recently, for a smart city, there is a demand for a technology for acquiring traffic information using an intelligent road infrastructure and managing it. In the meantime, various technologies such as loop detectors, ultrasonic detectors, and image detectors have been used to analyze road traffic information but these have difficulty in collecting various informations, such as traffic density and length of a queue required for building a traffic information DB for moving vehicles. Therefore, in this paper, assuming a smart city built on the basis of a camera infrastructure such as intelligent CCTV on the road, a solution for calculating the traffic DB of moving vehicles using Vision Tracking of road CCTV cameras is presented. Simulation and verification of basic performance were conducted and solution can be usefully utilized in related fields as a new intelligent traffic DB calculation solution that reflects the environment of road-mounted CCTV cameras and moving vehicles in a variable smart city road environment. It is expected to be there. 최근 스마트시티 구축을 위하여 지능형 도로인프라를 이용한 차량의 교통정보를 취득하고, 이를 효율적으로 관리하기 위한 기술의 개발이 요구되고 있다. 그동안 도로의 교통정보를 분석하기 위해서는 루프 검지기, 초음파 검지기, 영상식 검지기 등의 다양한 기술들이 활용되고 있었다. 그런데, 이러한 종래의 기술들은 도로내에서 이동하는 차량을 대상으로 교통정보 DB 구축을 위해 필요한 교통 밀도, 대기행렬의 길이등 다양한 교통 DB의 수집에 어려움이 있었다. 따라서, 본 논문에서는 도로위에 지능형 CCTV등 카메라 인프라를 기본으로 구축되는 스마트 시티를 가정하여 도로의 CCTV카메라를 이용하여 도로 CCTV의 Vision Tracking을 이용한 주행차량의 교통DB산출하는 솔루션을 제시하고, 이에 대한 모의실험과 기초성능 검증을 행하였다. 본 논문에서 제시한 솔루션은 일반론으로 발전시켜야할 숙제는 여전히 남아있지만, 가변하는 스마트시티 도로환경속에서 도로부착형 CCTV카메라 이동차량 환경을 반영한 새로운 지능형 교통DB산출솔루션으로 관련 분야에서 유용하게 활용될수 있을것으로 기대된다.
CoAP 기반 클라우드 환경 IoT 구조 설계 및 구현
박영기,양현식,김영한,Park, Young-Ki,Yang, Hyun-Sik,Kim, Young-Han 대한임베디드공학회 2015 대한임베디드공학회논문지 Vol.10 No.3
In the IoT(Internet of Things) environment, methods that user can access sensor node directly to collect sensing data or manage sensor in a gateway have a limitations. To solve this problem, cloud based sensor network architectures are proposed. In this paper, we proposed CoAP based IoT architecture that a lightweight gateway is used for data gathering instead of using a heavy traditional one and users can request sensing data through IoT applications running in the cloud environment and analyze signaling message cost. By doing so, our system can reduce message cost compared to the traditional gateway based system.
'담장 허물기'에 따른 주거환경변화에 대한 거주자 의식 조사
나경욱(Na Kyoung-Wook),전명화(Jeon Myung-Hwa),정미렴(Jung Mi-Ryum),박영기(Park Young-Ki) 대한건축학회 2008 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.28 No.1(계획계)
The purpose of this study is to survey about the changes of the resident's behavior and psychology after house's opening of fence project in Seoul. This research attempts to evaluate the people through a view of physical, psychological and social way. The method of evaluation used a field investigation, an interview and a checklist that was made from related references. The result of this study, the residential satisfaction has slightly improved after opening of fence. Especially the people could reduce the stress of parking. But the people have a serious anxiety that concerns with privacy and crime prevention because of the indefinite area. On the other hand, the change of the people's behavior and psychology about the area of defence has extended from their garden to neighbour and the street of the area.
호텔 아웃소싱 직원의 직무만족과 조직몰입과의 관계 - 경영방식이 다른 특1급 호텔을 중심으로 -
박영기 ( Park Young-ki ),박재성 ( Park Je-seung ),이상희 ( Lee Sang-hee ) 한국호텔리조트학회(구 한국호텔리조트카지노산학학회) 2017 호텔리조트연구 Vol.16 No.1
This study purposes to analyze the relationship between work satisfaction and organizational commitment recognized by outsourcing employees working at a hotel, and the differences between management method of chain and non-chain hotels to drag practical implications to effectively manage outsourcing employees who would work at various departments of hotels in the future, and to propose the improvement measures. The summary of the analysis and result through hypothesis verification are as follows. First of all, for the general characteristics of a sample, the age group of outsourcing employees was mostly 40s and 50s, and females were more than male in gender. Second, the work satisfaction had an effect to the organizational commitment for the relationship between work satisfaction and organizational commitment of outsourcing employees. That is, interest in work, opportunity for promotion, psychological stability and working environment had an effect to an organization concentration. Third, the difference in work satisfaction of chain and non-chain outsourcing employees with different management method showed higher work satisfaction from chain hotel employees, however, higher work satisfaction in the working environment and psychological stability were high from non-chain hotel employees.
국내소비자의 해외직접구매의 만족과 불만족 요인이 해외직접구매에 미치는 영향 연구
박영기(Young-Ki Park) 한국무역연구원 2021 무역연구 Vol.17 No.6
Purpose This study analyzes factors of satisfaction and dissatisfaction for overseas direct purchases in order to convert or induce overseas direct purchases into domestic purchases. Design/Methodology/Approach This study used 243 samples collected through surveys from Korean consumers with overseas direct purchase experience for analysis. This study analyzed the factors of satisfaction and dissatisfaction of overseas direct purchases of Korean consumers through the use of statistical methods including frequency analysis, cross tabulation analysis, and multiple linear regression analysis. Findings As a result of classifying quality attributes based on the Kano model, 1 indifferent quality and 19 one-dimensional qualities were found. In results using Timko’s customer satisfaction coefficient, ‘cheapness’, ‘appropriateness’, ‘product diversity’, ‘economic efficiency’, and ‘delivery speed’ were ranked as the top satisfaction coefficients, and ‘cheapness’, ‘economic value’, ‘appropriateness’, ‘delivery speed’, ‘product diversity’, and exchangeability’ were ranked as the top dissatisfaction coefficients. As a result of multiple linear regression analysis, it was found that both satisfaction and dissatisfaction had the greatest effect on cheapness. Research Implications This study attempted to analyze a situation where studies on the conversion of direct overseas purchase to domestic purchase were insignificant. In order to induce or convert overseas direct purchases into domestic purchases at a time when overseas direct purchases are increasing, price factors should be prioritized, and efforts should be made to ensure that product diversity and delivery are quickly carried out, and exchanges and returns are performed properly.