• Journal of Korea Society of Industrial Information Systems
• /
• v.21 no.1
• /
• pp.71-82
• /
• 2016

This study has been carried out to provide data for the workforce by analyzing personnel status of medical device manufacturers, level of difficulty in securing human resource, reason for difficulty in securing human resource, resignation rate, and recruitment methods. Results, medical device manufacturers are required overseas sales personnel responsible for international certification and exported, regardless of the production item. And the company is located in the metropolitan area did not facilitate a secure workforce. Medical device manufacturers have difficulties in securing personnel, regardless of the employees and sales. In particular, Class 3 production company was more difficult. The reason that it is difficult to secure the human resources is attributable to the poor working conditions of the private companies and there is a few possible employees equipped with the job competency demanded by corporate entities. With respect to the analysis on the retirement rate, the larger the company scale and the more the employee number, more difficulty is experienced in the human resource management. Therefore, for any medical device manufacturers with large organization scale, it would be critical to introduce appropriate human resource management program.

• Food Science and Biotechnology
• /
• v.15 no.5
• /
• pp.786-791
• /
• 2006

Three solvent extraction techniques were used to recover waxy tractions from grain sorghum kernels. Yield and chemical composition of the waxy tractions obtained by reflux, bench scale (recirculated solvent), and countercurrent extraction methods were compared. Waxy traction yield from countercurrent extraction (0.200%) was significantly greater (p<0.05) than the yields of wax from both reflux (0.184%) and bench-scale (0.179%) methods. The waxy traction extracted using the bench-scale method showed the greatest relative amount of long-chained (primarily C:28 and C:30) alcohols while the countercurrent-extracted wax showed the greatest relative amount of long-chained fatty acids and fatty aldehydes. Countercurrent extraction removed a higher additive percentage of fatty aldehydes, acids, and alcohols than reflux or bench-scale extraction method.

• Journal of Korea Multimedia Society
• /
• v.21 no.2
• /
• pp.108-116
• /
• 2018

In this paper, we propose an image enhancement method based on Multi-Scale Retinex theory that designs Unsharp Masking Filter (UMF) and emphasizes the contrast ratio adaptively. Unsharp Masking (UM) technique emphasizes image sharpness and improves contrast ratio by adding high frequency component to the original image. The high frequency component is obtained by differentiating between original image and low frequency image. In this paper, we present how to design an UMF kernel and to adaptively apply it to increase the contrast ratio according to multi-scale retinex theory which resembles human visual system. Experimental results show that the proposed method has better quantitative performance indexes such as PSNR, ambe & SSIM and better qualitative feature like halo artifact suppression.

• Korean Journal of Child Studies
• /
• v.30 no.2
• /
• pp.57-69
• /
• 2009

Instruments used in this study were the Peer Competence Scale(Park & Rhee, 2001), Infant Temperament Questionnaire(Chun, 1993), Emotional Intelligence Quotient Scale(Kim & Kim, 1998), Maternal Parenting Scale(Park & Lee, 1990) Parental Involvement Checklist(Cohen, 1989), and Student-Teacher Relationship Scale(Pianta, 1991). Subjects were 400 preschoolers and their mothers in Seoul. Data were analyzed by descriptive statistics, Pearson's correlation, and multiple regression analysis. Results indicated that (a) children of employed mothers had higher peer competence than children of unemployed mothers. (b) Closeness in teacher-child relationship was the strongest predictor for peer competence of children of employed mothers; maternal strategies promoting peer relationships was the strongest predictor for peer competence of children of unemployed mothers.

• Journal of the Korean Society of Costume
• /
• v.67 no.1
• /
• pp.95-109
• /
• 2017

The objectives of this study are to develop a cosmetic involvement scale focusing on Korean men in their 20s and 30s, verify its validity and examine the characteristics of this group. The results of this study's analyses showed that cosmetic involvement scale could be classified into 5 factors: 'trend & interest involvement', 'prestige sensitivity involvement', 'price and value involvement', 'skin involvement,' and 'obligatory involvement'. Also the cosmetic involvement of the target group was classified into 'amusing high-involvement group', 'rational low-involvement group', and 'obligatory high-involvement group'. This study has significance in showing differences of cosmetic involvement factors by gender and proposing a cosmetic involvement scale of Korean men in their 20s and 30s, which has taken men's distinctiveness into consideration.

• Proceedings of the Korean Institute of Intelligent Systems Conference
• /
• 1997.11a
• /
• pp.63-66
• /
• 1997

The rule bases self organizing controller(SOC) has one of its main advantages in the fact that there is no need to have a mathematical description of the system to be controlled. In this controller, the rules are linguistics statements expressed mathematically through the concepts of fuzzy sets and correspond to the actions a human operator would take when controlling a given process. With this controller, we have performed to sight stabilization system, and we realize that it needs a scale factor tuning. The self tuning controller(STC) uses an instantaneous system fuzzy performance which can give an inspection to the scale factor. Therefore, the STC can compensate the scale factor when it is not adequately tuned. With this trial, we shows that STC can give a good transient characteristics in the nonlinearity which imposed basically in the conventional servo system.

• 한국정보디스플레이학회:학술대회논문집
• /
• 2009.10a
• /
• pp.1546-1549
• /
• 2009

In recent studies on tone reproduction with the objective of reproducing natural looking colors in digital images, an integrated multi-scale retinex (IMSR) has produced great naturalness in the resulting images. Most methods, including IMSR, work in RGB or quasi-RGB color spaces. As such, this produces hue distortion from the perspective of the human visual system. Accordingly, this paper proposes the hue preserved multi-scale Retinex (HPMSR) method to obtain a high contrast and naturalness. The proposed method enhanced the $L^*$ and saturation values in CIELAB color space. As a result, the visibility in dark shadows in the resulting images was improved.

• Journal of Environmental Science International
• /
• v.11 no.10
• /
• pp.1117-1123
• /
• 2002

Coating ceramic balls activate water molecular in water as radiate far-infrared radiation of high efficiency, and then prevent formation of scale and corrosion of pipe. Therefore, but only keep away drop of heat exchange efficiency of boiler, not also remove formed scale. As a result, pipe of boiler has clean and has form thin protection film in inner of pipe. Also, the water treated by rust preventing system using the ceramic balls, that is harmless, tasteless, odorless, and non-toxicity in the human body, and it can use drinking water. This rust preventing system can save energy and protect environment.

• Journal of Korean Institute of Industrial Engineers
• /
• v.40 no.1
• /
• pp.1-7
• /
• 2014

We consider a human contact social network that has connections through cellphone addresses. To construct such a social network, we use real call records provided by a large carrier, and connect to each other if there exists a call record between any two cellphone users. Due to its huge amount of data, we down-sample it in a way that the smallest-degree nodes are removed, in turn, from the network. For a moderate size of the networks we show that the degree distribution of the network follows a power-law distribution via linear regression analysis, implying the so-called scale-free property. We finally suggest some alternative measures to analyze a social network.

• Journal of Multimedia Information System
• /
• v.5 no.2
• /
• pp.111-114
• /
• 2018

Traffic accident analysis is important to reduce the occurrence of the accidents. In this paper, we analyze the traffic accident with Apriori algorithm to find out an association rule of traffic accident in Korea. We first design the traffic accident analysis model, and then collect the traffic accidents data. We preprocessed the collected data and derived some new variables and attributes for analyzing. Next, we analyze based on statistical method and Apriori algorithm. The result shows that many large-scale accident has occurred by vans in daytime. Medium-scale accident has occurred more in day than nighttime, and by cars more than vans. Small-scale accident has occurred more in night time than day time, however, the numbers were similar. Also, car-human accident is more occurred than car-car accident in small-scale accident.