• 디지털융복합연구
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• 제9권1호
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• pp.115-124
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• 2011

The property of the mobile phone is taking important role to choose it. In the present situation, exploring, comparing and analyzing the important properties of regular mobile phone(feature phone) and smart phone are very meaningful study. Therefore, the survey was carried out to get the properties of feature phone and smart phone and analyze the difference of those phones. And proposed the important variables for customer satisfaction which must be given priority. The result showed that 'design' and 'Quality' are important to both mobile phone user groups. The problems with mobile phones currently in use were 'poor performance' to feature phone users and 'expensive charge' and 'poor A/S' to smart phone users. Two groups also showed significant difference with the customer satisfactions, and smart phone user group showed higher satisfaction. For smart phone user group, four factors are induced from the properties but 'Hardware Quality' (representing 'call Quality', 'A/S', 'Convenience to use', 'Battery life') and 'Design & Function'(representing 'Internet', 'Convergence Functions', 'Design, 'Color') have significant and positive effects on Customer Satisfaction.

• 한국항해학회지
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• 제23권4호
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• pp.105-114
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• 1999

Generally, though we use the vision sensor or arc sensor in welding process, it is difficult to define the welding parameters which can be applied to the weld quality control. Especially, the important Parameters is Arc Voltage, Welding Current, Welding Speed in arc welding process and they affect the decision of weld bead shape, the stability of welding process and the decision of weld quality. Therefore, it is difficult to determine the unique relationship between the weld bead geometry and the combination of various welding condition. Due to the various difficulties as mentioned, we intend to use Fuzzy Logic and Neural Network to solve these problems. Therefore, the combination of Fuzzy Logic and Neural network has an effect on removing the weld defects, improving the weld quality and turning the desired weld bead shape. Finally, this system can be used under what kind of welding recess adequately and help us make an estimate of the weld bead shape and remove the weld defects.

• 품질경영학회지
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• 제14권2호
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• pp.2-8
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• 1986

This thesis is concerned with the design of control chart based on the sample median which is easy to use in practical situations and to analyze the properties for non-normally distributed Weibull process. In this cases are use to the quality characteristics of the process are not normally distributed but skewed due to the intermitted production, small lot size and sample size is small one n=3 or n=5, etc. And when it relates unsymmetrically distributed process, model designed median control chart is more effective than Shewhart $\bar{x}$-chart which assumed on normal distribution, when we exactly should be known Weibull distribution or estimated. The median control chart in this thesis is more robustness compared with other conventionally developed control chart.

• 응용통계연구
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• 제17권3호
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• pp.557-571
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• 2004

통계품질(statistics quality)은 통계가 얼마나 사용자들이 이용하기에 적합한가를 나타내는 특성으로, 최근 선진국 및 국제기관들을 중심으로 높은 관심을 보이고 있다. 본 논문에서는, 통계품질관리의 개념, 통계품질의 척도, 통계품질관리의 8단계(조사기획, 표본설계, 조사표 설계, 조사원 훈련 및 자료수집, 조사결과 분석, 이용자 서비스, 사후관리, 통계품질평 가 및 관리 )를 소개하고, 표본조사통계를 위한 통계품질관리 가이드라인을 제시한다.

• International Journal of Quality Innovation
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• 제3권2호
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• pp.1-12
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• 2002

Quality is distinguished from the other important management indicators, cost and profitability, by the features of its far longer history and of common concern to both manufacturer and customer. We may say from this that quality has a far more human aspect than either cost or profitability. We stress the importance of establishing “quality culture.” But we do not commonly use the terms of “cost culture” or “productivity culture.”In addition, we know from our experiences that improving quality by creative methods can lead to lower cost and higher productivity, although the converse is not necessarily true. In the Maslow's hierarchy of human needs, it is known that the character of human needs changes from extrinsic and material ones at lower levels to intrinsic and mental or spiritual ones at higher levels. We know from our experience that employee satisfaction is closely linked with quality, which is of more human nature and can further be deployed into the detailed elements of quality. The leaders and managers should positively display leadership and respond to the efforts of the subordinates. Without these managerial leadership and efforts, it is almost impossible to provide essential and true customer satisfaction. They are the indispensable elements for business excellence.

• 한국IT서비스학회지
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• 제13권1호
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• pp.87-101
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• 2014

This paper is a study on information Quality of Domestic Call Center Information System; recognized the importance of information quality and analyzed the impact on use and satisfaction of users following information quality which is a success element and ultimately the impact on user's performance by expanding information quality evaluating model by Jeong-Woo Lee et al.(2003) who reflected domestic special corporate culture based on information system success model by DeLone and McLean(2003). This is meaningful in providing theoretical foundation for efficient information quality supply and building quality management system at call center in future and provides hints to be considered in raising understanding of consultants on provided information and arranging ground that can utilize it in a timely manner.

• 대한용접접합학회:학술대회논문집
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• 대한용접접합학회 2002년도 Proceedings of the International Welding/Joining Conference-Korea
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• pp.330-335
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• 2002

Resistance spot welding is one of the most widely used processes in sheet metal fabrication. Quality assurance of welding has been important to increase the productivity. In this study, weld quality estimation using primary circuit dynamic resistance applied to the in-process real-time systems. For quality estimation, factors relating to quality were extracted from the dynamic resistance, measured in the timer. The relationship between these factors and weld quality was determined through a artificial neural network model. This method has the advantage over the conventional one, such as obtaining the quality information without the use of extra devices.

• 국제교류와 융합교육
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• 제1권2호
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• pp.48-67
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• 2021

본 연구는 국정도서로 개발되는 특수교육 기본교육과정 교과서의 질 관리를 위해 특수교사를 대상으로 교과서 사용 단계의 평가 체제 구축과 관련한 인식을 조사하고, 그 결과를 바탕으로 교과서 평가 체제 구축 방안을 제안한 것이다. 연구를 위하여 우선 국정도서의 질 관리 체제를 개발단계와 사용 단계로 나누어 살펴본 다음, 사용 단계의 질 관리 체제로서 사용 단계 평가 체제의 필요성을 제기하였다. 다음으로 사용 단계의 평가 체제 구축 방안을 모색하기 위해서 전국의 특수교사를 대상으로 모바일 메신저를 통해 평가체제 구축과 관련한 설문을 배포하고 그 중 설문에 참여한 159명의 응답을 분석하였다. 분석 결과, 기본교육과정 교과서를 사용하고 있는 특수교사의 교과서에 대한 만족도는 평균 3.3점이었으며, 사용 단계의 교과서 평가가 필요하다는 인식은 평균 4.02로 만족도보다 높았다. 사용 단계 평가 체제의 구축 방안에 있어서, 평가의 주체는 교사(98.7%), 독립된 플렛폼 구축(62.2%), 정기평가(49.4%), 척도형 문항과 개방형 문항을 혼합한 문항(50.6%)을 선호하였다. 또 평가 결과는 '사용자로 인증된 사람에게만 공개(55.1%)', 평가 결과반영 시기는 '차기 교과서 개발 시'가 가장 많았다(41.0%). 연구결과를 바탕으로 특수교육 기본교육과정 교과서의 사용 단계 평가 체제 구축을 위해서는 독립적인 평가 플렛폼을 구축하되, '교과서 사용성'을 규명하여 간단하고 명료한 질문을 통해 교과서 사용자 모두가 부담없이 평가할 수 있도록 하고, 질관리위원회 조직을 통해 평가 결과의 수정반영 여부를 심의할 것을 제안하였다. 또, 평가 플렛폼에 이미 개발된 교과서와 사용자인 교사가 제작한 다양한 콘텐츠를 탑재할 수 있도록 하여 개발-사용-평가 통합형 플렛폼을 운영할 것을 제안하였다.

• The Korean Journal of Ecology
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• 제22권5호
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• pp.235-240
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• 1999

토지이용이 어떻게 수질에 영향을 주는가를 연구하고자 1993년 3월 부터 1998년 3월 까지 조사를 실시하였다. 조사지는 충북 옥천군 이원면의 경작지가 주류를 이루는 개심저수지와 산지유역으로 특성지워지는 장찬저수지 유역을 대상으로 하였다. 조사유역을 11개 소집수역으로 세분하고 토지이용과 하천수질과의 상관성, 하천 유역의 오염원 동태를 생태학적 관점에서 규명하고자 조사를 실시하였다. BOD, SS, TKN은 하류로 갈수록 높아졌으나 자정 한계를 넘어선 G 소집수역은 예외였다. 장찬저수지 유역은 가두리 양식장 때문에 수질이 악화되어 있는 것으로 나타나 양식장의 폐쇄가 시급한 것으로 조사되었다. .해발표고는 200 m 이하가 개심저수지 유역 56.0%, 장찬저수지 유역 44.0%로 대부분을 차지하였다. 비삼림지역은 전체 조사면적 44.91 ㎢중 14.74 ㎢로 32.8%를 차지하였는데 특히 경작지와 주거지 면적 비의 증가에 따라 총인(Y=0.2023X＋0.0991, r=0.54)이 증가되고 있다. 토지이용별 오염 배출원 단위가 수질에 미치는 영향을 분석한 결과 농경지의 오염부하량은 매우 크며 비점오염물질이 하천에 유입, 유하 하는 동안 물리, 화학, 생화학적, 생물학적 변화를 거쳐 농도가 낮아지고 있다. 그러나 삼림지역의 오염부하량은 농경지의 오염부하량 보다는 상대적으로 작으나 오히려 하천으로 유입, 유하하는 동안 오염 물질의 양이 높아졌다.

• Journal of Korean Biological Nursing Science
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• 제17권4호
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• pp.363-371
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• 2015

Purpose: The purpose of this study was to assess alcohol and caffeine intake and identify the impact of alcohol and caffeine intake on body mass index, alcohol use disorder, and quality of sleep among university students. Methods: This study design was accomplished with a cross sectional survey and conducted from May to June 2014. One hundred and twenty-four freshmen of E university in S city, Korea were selected and evaluated by self-administered questionnaires. Alcohol and caffeine intake were measured by self-reported recall. The data were analyzed using descriptive analysis, independent t-test, one-way ANOVA, Pearson's correlation, and multiple linear regression. Results: The average amount of alcohol intake was $175.02{\pm}219.97g$ and the proportion of freshmen who took in more than 40 g per day of alcohol was 75%. The average amount of caffeine intake was $116.79{\pm}111.14mg$. Factors influencing alcohol use disorder were dwelling type (t=2.25, p=.027) and alcohol intake (t=8.11, p<.001). And, the factor influencing quality of sleep was caffeine intake (t=3.88, p<.001). Conclusion: In order to reduce the harmful drinking of university students, preventive activities for freshmen are required and efforts on the part of the school needed.