• Biotechnology and Bioprocess Engineering:BBE
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• 제10권3호
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• pp.186-191
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• 2005

In this study, a microorganism-produced protease was used to improve the quality of fabrics. First, the protease-producing bacteria were isolated from soils, and one of them was selected and identified as Bacillus sp. SJ-121. The optimal medium composition for its growth and protease production was determined to be as follows: glucose 1g/L, soybean meal 0.5g/L, soy peptone 0.5, $K_2HPO_4\;0.2,\;MgSO_4\cdot7H_2O\; 0.002,\;NaCl\;0.002,\;and\;Na_2CO_3g/L$. Also, the optimal temperature for the production of the protease by Bacillus sp. SJ-121 was about $40^{\circ}C$ at pH 7. The wool and silk were treated with the protease from Bacillus sp. SJ-121. Following the protease treatment, changes in the surface of a single yarn of the fabrics were observed by both an optical microscope and a scanning electron microscope (SEM). Changes in the K/S value of the wool and silk were measured by spectrophotometric analysis, in order to determine the amount of dye uptake in the fabrics. We also performed a tensile strength examination in order to determine the degree and nature of mechanical changes in single yarns of the wool and silk fabrics. By increasing the protease treatment time to 48 h, the dyeing characteristics of the fabrics were enhanced, and the surfaces of the single yarns of the fabrics became smoother, due to the removal of soil and scale in them. However, no mechanical changes were detected in the fabrics. Therefore, we suggest that proper treatment of the protease produced by Bacillus sp. can improve the quality of silk and wool.

• 한국식품영양과학회지
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• 제38권1호
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• pp.98-104
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• 2009

본 연구는 $60^{\circ}C$ 고온저장 조건에서 4주 동안 PET 포장된 녹차음료의 품질 변화 특성과 품질열화를 최소화할 수 있는 포장 근거를 마련하기 위하여 PET 포장용기의 산소투과성 및 cap의 밀봉 안정성을 조사하였다. 고온저장 조건에서 MXD6 blend PET는 가스 차단성이 우수하였으며 4주 동안 TEN cap의 removal torque 변화도 적게 나타났다. 4주 동안 고온저장 중 녹차음료의 pH, 색도 및 비타민 C 및 카테킨 함량은 유의적으로 변화하였고 카페인과 총 아미노산의 함량은 고온저장 중 크게 변화하지 않았다. Hexanol, linalool, menthol 및 ${\alpha}$-terpineol 4종의 alcohol류 향기성분은 고온저장 3주차까지 급격한 함량 증가를 보였고 d-limonene은 큰 변화가 없었다. 관능평가 결과는 떫은맛과 향, 전체적인 맛은 기호도가 낮아지는 결과를 보였다.

• 한국의료질향상학회지
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• 제27권2호
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• pp.30-44
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• 2021

Purpose: The aim of this study was to investigate the changes in perception of the New Diagnosis-Related Group (DRG)-based payment system, make overall evaluation after participation, and examine opinions on further policy improvement among employees of a public hospital participating in the pilot project in Korea. Methods: We investigated changes in perception of the New DRG-based payment system before and after participation in the pilot project using a qualitative research method. We conducted individual in-depth interviews with the management and healthcare professionals and Focus Group Interviews (FGIs) with the staff in the nursing and administrative departments. Results: Before implementing the pilot project of the New DRG-based payment system, the management was in favor of participating in the pilot project, whereas the healthcare professionals were strongly opposed to participation in the pilot project, and the staff in the nursing and administrative departments were slightly opposed to participation. After implementing the pilot project, there were remarkable changes in the perception of the New DRG-based payment system among healthcare professionals and the administrative staff. Healthcare professionals' perception was altered in a positive way, while the administrative staff's perception of the system became negative. Conclusion: There were no restrictions on clinical practice or deterioration of quality of care observed in association with the participation in the New DRG-based payment system. However, certain unintended consequences of the New DRG-based payment system may arise as well. Therefore, the government needs to examine the problems identified in this study to reflect on and improve the New DRG-based payment system for stable expansion.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제4권3호
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• pp.324-340
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• 2010

Video streaming service over wireless networks is a challenging task because of the changes in the wireless channel conditions that can occur due to interference, fading, and station mobility. To provide an efficient wireless video streaming service, the rate adaptation scheme should improve wireless node performance and channel utilization. Moreover, the quality adaptation scheme should be considered at the streaming application. To meet these requirements, we propose a new cross-layer design for video streaming over wireless networks. This design includes the rate and quality adaptation schemes. The rate adaptation scheme selects the optimal transmission mode and resolves the performance anomaly problem. Based on performance improvement by the proposed rate adaptation scheme, our quality adaptation scheme improves the quality of video streaming. Through performance evaluations, we prove that our cross-layer design improves the wireless channel utilization and the quality of video streaming.

• International Journal of Quality Innovation
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• 제10권2호
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• pp.57-76
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• 2009

Although many adherents openly praise the importance of quality management practices (QMP) in organisations, others have identified significant costs and implementation obstacles. Some recent studies showed that QMP have failed due to the ignorance of quality cultures. How to improve the success rate of QMP in organisations has become a critical issue both in the academy and in practice. This paper discusses the common enablers of and cultural impacts on QMP. It explores the dimensions of national versus organisational culture, and identifies the main features of four quality culture models as advocated in the literature in relation to facilitating QMP in organisations. It was found that flat structures, decentralised functions, empowerment, flexibility, innovation, limited rules and regulations and teamwork favor the QMP implementation. For facilitating culture changes for QMP, values associated with low power distance, low uncertainty avoidance and collectivism would have to be nurtured. Further research is needed to incorporate the findings and develop a practical quality culture approach for real applications in industry.

• 품질경영학회지
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• 제29권4호
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• pp.116-132
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• 2001

The world wide web has been growing rapidly. Due to the development, many companies are using the e-commerce through the web as an another tool for the their deal with customers. The internet is utilized as the new distribution business and channel for the most companies. This innovative changes made many people to purchase products through the web. However, there are a lot of problems during the process of supply chain channels. This research is about the impact of service quality on the customer satisfaction in the business-to-consumer(B2C) e-commerce. It was performed by utilizing the methodology for measuring the degree of service quality which has been adopted in the service quality research area. The quality of service is made up of six dimensions(factors): reliability, responsiveness, assurance, empathy, tangible, and convenience. Therefore, we studied the influence of these six factors upon the customer satisfaction, and the results will be summarized.

• 상하수도학회지
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• 제11권3호
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• pp.59-66
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• 1997

Although it produces well-treated water in water treatment plant, water quality at the tap can be changed depending on the state of pipes. It is because water quality deteriorates as plant water passes through pipeline networks. Therefore, the improvement of not only water treatment technology but also O & M of water pipelines is required to supply good water to consumers. The purpose of the study was to obtain the basic data of control technology for water quality in pipes through investigating water quality in distribution system. We selected 11 sampling sites and investigated water quality from plant to endpoint of distribution system. we also simulated decreasing tendency of free chlorine through pipeline network. As the result of water quality test, all parameters were below allowable levels, but some parameters had the possibility of being over levels. So there must be more work to set up proper countermeasure for violable parameters.

• Advances in environmental research
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• 제6권1호
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• pp.53-65
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• 2017

Assessment of seasonal changes in surface water quality is an important aspect for evaluating temporal variations of river pollution due to natural or anthropogenic inputs of point and non-point sources. In this study, surface water quality data for 15 physico-chemical parameters collected from 7 monitoring stations in a river during the years from 2014 to 2016 were analyzed. The principal component analysis technique was employed to evaluate the seasonal correlations of water quality parameters, while the principal factor analysis technique was used to extract the parameters that are most important in assessing seasonal variations of river water quality. Analysis shows that a parameter that is most important in contributing to water quality variation for one season may not be important for another season except alkalinity, which is always the most important parameters in contributing to water quality variations for all three seasons.

• 대한안전경영과학회지
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• 제19권4호
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• pp.221-230
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• 2017

Recently, service quality must reflect several demands of customers who show rapid and various changes so as to be compared with the past. So, objective and rapid methods for them are necessary more. For them, first of all, service company must calculate their standard of service quality accurately by measuring service quality exactly. To measure service quality accurately, this researcher collected and analyzed data by survey for customers who are customers of logistics services, grasped potential satisfaction standard(P) by 5 point Likert scale and one survey for accurate classification of quality attributes through weighted customer satisfaction coefficient changing quality attributes by developing the study on Kano model and Timko's customer satisfaction coefficient, and suggested Potential Customer Satisfaction Improvement index(PCSI) for examining the improvement of customer satisfaction so as to utilize them as an index of differentiated and concrete measurement of service quality.

• 월간포장계
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• 통권222호
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• pp.88-92
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• 2011