• 품질경영학회지
• /
• 제41권4호
• /
• pp.637-648
• /
• 2013

Purpose: The objective of this study is to provide a methodology that can facilitate efficient development of a product portfolio by utilizing Korean Standards(KS) networks. Methods: A case study on a steel manufacturing company is provided. Social network analysis h as been conducted on KS network and KS certification information of the company. Core test standards of a company have been identified. The core standards, then, used to construct a product-standard network of a corresponding industry. Results: As a result of analyzing product-standard networks, a product portfolio of a company has been developed. It has been shown that the candidate product portfolio is a cost-effective alternative in terms of standard maintenance cost. Conclusion: By using social network analysis, standards information can be used to support new product development process.

• 아시안잔디학회지
• /
• 제13권2호
• /
• pp.79-90
• /
• 1999

This study was conducted to provide basic understandings for proper management of zoysiagrass fairways. Mowing intervals of 2, 4 and 6-days, with and without aeration were compared at two fertility levels. Turfgrass quality, growth and pest infestation were evaluated. Turf density, number of tillers, leaf width and resiliency were significantly affected by mowing frequency. Turfgrass plots mowed every 2-day had greater density, tillering, and resiliency but had narrower leaf width compared to other mowing treatments. Clipping dry weight with every 2-day mowing increased in the early stage of mowing treatment regardless of fertilizer application rates but gradually decreased in the later stage of mowing treatment compared to every 4 or 6-day mowings. The dry weight of above-ground part was not affected by mowing frequency, but that of underground part was significantly higher for every 6-day mowing frequency(3.3kg/day/m2) compared to every 2 or 4-day mowings. The organic mater content in soil was not different among mowing treatments but it was significantly reduced by the core aerification treatment, indicating significant effect of core aerification on thatch decomposition. Occurrences of weeds such as annual bluegrass and crabgrass according to mowing frequency were greater in every 2-day mowing treatment, while plots mowed every 6 days had less weed occurrence. Occurrence of rusts significantly increased in high fertility plots and frequently mowed turfgrasses.

• 한국의류산업학회지
• /
• 제18권1호
• /
• pp.113-119
• /
• 2016

The evolution of spinning technology was focused on improving productivity with good quality of yarns. More detail spinning technology according to mixing of various kinds of fibre materials on the air vortex spinning system is required for obtaining good quality yarns. This paper investigated the physical properties of air vortex yarns compared with ring and compact yarns using PTT/tencel/cotton fibres. It was observed that unevenness of air vortex yarns was higher than those of ring and compact yarns, which resulted in low tenacity and breaking strain of air vortex yarns. Initial modulus of air vortex yarns was higher than those of ring and compact yarns. Yarn imperfections of air vortex yarns such as thin, thick and nep were much more than those of ring and compact yarns. These poor yarn qualities of air vortex yarn were attributed to the fasciated yarn structure with parallel fibres in the core part of the air vortex yarn. However, yarn hairiness of air vortex yarns was less and shorter than those of ring and compact yarns. Thermal shrinkage of air vortex yarns were higher than that of ring yarns, which was caused by sensible thermal shrinkage of PTT fibres on the bulky yarn surface and core part of air vortex yarns.

• 대한기계학회:학술대회논문집
• /
• 대한기계학회 2003년도 추계학술대회
• /
• pp.490-495
• /
• 2003

In steel-making process of iron and steel industry, the purity and quality of steel can be dependent on the amount of CO contained in the molten metal. Recently, the supersonic oxygen jet is being applied to the molten metal in the electric furnace and thus reduces the CO amount through the chemical reactions between the oxygen jet and molten metal, leading to a better quality of steel. In this application, the supersonic oxygen jet is limited in the distance over which the supersonic velocity is maintained. In order to get longer supersonic jet propagation into the molten metal, a supersonic coherent jet is suggested as one of the alternatives which are applicable to the electric furnace system. It has a flame around the conventional supersonic jet and thus the entrainment effect of the surrounding gas into the supersonic jet is reduced, leading to a longer propagation of the supersonic jet. In this regard, gasdynamics mechanism about why the combustion phenomenon surrounding the supersonic jet causes the jet core length to be longer is not yet clarified. The present study investigates the major characteristics of the supersonic coherent jet, compared with the conventional supersonic jet. A computational study is carried out to solve the compressible, axisymmetric Navier-Stokes equations. The computational results of the supersonic coherent jet are compared with the conventional supersonic jets.

• 생물환경조절학회지
• /
• 제15권1호
• /
• pp.78-83
• /
• 2006

The objective of this study was to examine effect of ethylene removal apparatus on fruit quality of 'Niitaka' pear (Pyrus pyrifolia) in case of a double storage of apples and pears in a storage room. Ethylene and carbon dioxide concentration were efficiently decreased by the ethylene removal apparatus. Fruit weight loss was high at double storage of apples and pears (DAP) in a storage room compared with storage of pears. Fruit core browning was $5{\sim}22.5%$ at the fruits in DAP, but as setting ethylene removal apparatus it was not occurred till 90 days after storage. Soluble solids content and fruit peel hardness were not different among the treatments. Accordingly, a double storage of apples and pears in a storage room is possible as setting ethylene removal apparatus.

• 한국조리학회지
• /
• 제5권2호
• /
• pp.261-279
• /
• 1999

In order to meet competitive power, foodservice should aim to satisfy customers through distinguished quality and service as well as speciality and know-how. Especially, in coming 2000 year will be openned ASEM, 2001 will be the "Year to visit Korea", 2002 will be openned Korea-Japan Soccer World Cup, with these event as a momentum the domestic foodservice industry would be continuously increased and improved. Foodservice industry is the tertiary industry with the potentiality, tremendous popularity, premanancy and future-orient, it is gradually taking root as a basic industry after going through the industrialization. Furthermore, foodservice industry aim to satisfy customer based on quality, services, cleanliness, atmosphere, timing and value, besides, it is customer closeby service which to supply value and satisfaction through systemization, being manual, being technological renovation. Strategic management of foodservice industry is as following: Firstly, marketing strategy requires positing strategy to recongnize self-brand to the customer, thus requires to get hold how to take firm in customers′ mind. And then distingushed strategy requires. So somehow it is important to secure competitive in customers′ mind. Secondaryly, it requires strategy of competive advantegy. It is not to improve unique core competence of industry which is developed and studies for a long time but to pursuit diversfication based on core of industry Thirdly, it requires strategy of customer satisfaction. In these modern days it is important how much to satisfy customer, as it could be not expect continuous frowth and development without strategy of customer satisfaction. Therefore strategy of customer satisfaction is a necessary condition for the foodservice industry.

• 한국진공학회:학술대회논문집
• /
• 한국진공학회 2009년도 제38회 동계학술대회 초록집
• /
• pp.225-225
• /
• 2010

In this study, the optimum structure of a magnetic thin film inductor was designed for application of DC-DC converters. The $Ni_{81}Fe_{19}$ (at%) alloy was selected as a high-frequency($\geq$ MHz) magnetic thin film core material and deposited on various substrates (bare Si, $SiO_2$ coated Si) using a high vacuum RF magnetron sputtering system. As-deposited NiFe thin films show similar magnetic properties compared to bulk NiFe alloys, indicating that they have a good film quality. The optimum design of solenoid-type magnetic thin film inductors was performed utilizing a Maxwell computer simulator (Ansoft HFSS V7.0 for PC) and parameters obtained from the magnetic properties of magnetic core materials selected. The high-frequency characteristics of the inductance(L) and quality factor(Q) obtained for the designed inductors through simulation agreed well with those obtained by theoretical calculations, confirming that the simulated result is realistic. The optimum structure of high-performance ($Q{\geq}60$, $L\;=\;1{\mu}H$, efficiency${\geq}90%$), high-frequency (${\geq}5MHz$), and solenoid-type magnetic thin film inductors was designed successfully.

• 품질경영학회지
• /
• 제51권4호
• /
• pp.677-689
• /
• 2023

Purpose: The purpose of this study is to design a x-ray screening rating system to improve X-ray screening ability, which is a core job competency of security screener at Incheon International Airport, and to verify its effectiveness through empirical analysis to suggest ways to improve the level management system. Methods: In this study, the effectiveness of the research model was analyzed using T-test tests for effect analysis based on the empirical analysis results derived through the competency evaluation model, the screening rating system. Results: The results of this study are as follows. The average score for regular education before the implementation of the x-ray screening rating system was 94.1 points, but after the implementation of the x-ray screening rating system, the average score for regular education was 95.5 points, an average of 1.4 points increased. In addition, the proportion of those with 95 or more points classified as high scorers also increased significantly from 51.1% to 69.3%. Conclusion: The X-ray screening rating system of security inspectors will systematically manage the level of screening ability, which is a key job competency, and play a strong role in improving competency, while preventing security accidents through early identification and intensive training of level-lowers.

• Journal of Korean Biological Nursing Science
• /
• 제17권4호
• /
• pp.306-314
• /
• 2015

Purpose: The purpose of this study was to evaluate symptoms, depression and quality of life in colorectal cancer patients who underwent stoma reversal, and to assess the factors related to their quality of life. Methods: A descriptive study was conducted on 125 colorectal cancer patients who underwent stoma reversal in a tertiary hospital in Korea. Data were collected using the Korean versions of the European Organization for Research and Treatment of Cancer-Quality of Life Core 30 and Colorectal Cancer Specific Questionnaire 38 (EORTC QLQ-C30 and CR38), and the Hospital Anxiety-Depression Scale. Data were analyzed using descriptive statistics, t-test, one-way ANOVA, Pearson's correlation, and multiple regression analyses. Results: Participants experienced sexual problems, difficulties in defecation, and nausea/vomiting. About twenty-two percent of the patients were depressed and the mean score for global quality of life was $64.40{\pm}19.43$. The multiple regression showed that social and cognitive functioning, depression, and the location of the anastomosis were the important factors that made contributions to the quality of life in colorectal patients with stoma reversal. Conclusion: Our results suggest that symptom management and emotional support should be incorporated into nursing interventions to improve the quality of life in colorectal patients with stoma reversal.

• 중환자간호학회지
• /
• 제6권1호
• /
• pp.21-33
• /
• 2013

Purpose: The purpose of this study was to examine the relationship between lymphedema self-care management and quality of life in breast cancer patients with mastectomy and lymphedema. Methods: One hundred and eighty-six breast cancer patients with mastectomy and lymphedema (n=186) were recruited at a medical center located in Seoul. The levels of lymphedema self-care management and quality of life were measured by the scale for measurement of practice in lymphedema self-care management, European Organization for Research and Treatment of Cancer-Quality of Life Core 30 (EORTC QLQ-C30) and European Organization for Research and Treatment of Cancer-Quality of Life Questionnaire Breast Cancer Module (EORTC QLQ BR23), respectively. Data were analyzed with SPSS 18.0 program. Results: There were statistically significant correlations between lymphedema self-care management and general health status/quality of life in mastectomy patients with lymphedema (r=.30, p<.001). The physical function score of cancer related function scale (r=-.15, p=.033), fatigue score of cancer related symptom scale (r=.15, p=.036), systemic side effect score of breast cancer related symptom scale (r=.45, p=.034), and upset by hair loss (r=.27, p=.004) were significantly correlated with quality of life. Conclusion: The findings suggest that these significant factors should be considered when caring for lymphedema patients.