인터넷 방송 재생 품질과 시청 만족도와의 관계

장활식,오창규 釜山 大學校 經營 經濟 硏究所 2000 經營 經濟 硏究 Vol.19 No.1

인터넷 방송의 성장가능성과 시장성은 급속도로 증가하고 있는 반면, 실제적인 방송 품질은 기존의 대중 매체와 비교할 때 미흡하다. 본 연구에서는 인터넷 방송이 가져야 되는 방송 품질을 전송 후 재생 품질 수준으로 한정짓고, 이러한 품질 수준이 시청 만족도에 어떻게 그리고 어느 정도 영향을 미치는가를 살펴보기 위해 실험연구를 수행하였다. 이를 통해 인터넷 방송을 시청하는 최종사용자의 시청 품질 만족도 수준을 규명함으로써 인터넷 방송 운영자가 내릴 수 있는 현실적인 대안을 제공하였다.

고속 유압용 척 개발

성활경,박종권,최수준 國立 昌原大學校 産業技術硏究所 1995 産技硏論文集 Vol.9 No.-

In a turning machine, a chuck has an important role of an interfacer between a machine tool and an workpiece. Chuck determines productivity and efficiency of a turning machine. Research on a high -speed Lathe cannot be done without research on a high-speed chuck. High Speeding of a chuck has been hindered by the centrifugal force and the high stress induced by the centrifugal force. Effect of the centrifugal force has been reduced by the application of the shape optimization and the counter balancing.

수퍼컴퓨터를 이용한 대단위 최적설계

성활경 國立 昌原大學校 産業技術硏究所 1989 産技硏論文集 Vol.3 No.-

Digital computers are indispensible tool in many modern science and engineering areas. The capabilities of any scientific computers, therefore, limit one's understanding of the problem being modeled. and one's ability to proceed into new direction. More accuracy is needed as the engineering design become more detailed and closer to real problems. Providing access to a super-computer partially eliminates barrier to large-scale computation, and encourages to initiate numerical experiments of already matured theories. The gigantic computing power of super-computers extend potential capabilities of engineers. Optimal design of a plate-beam-truss built-up structure is sought. The main interest is to demonstrate the possibility of large-scale design optimization, utilizing parallel computation of super-computer CRAY.

h-Refinement 방법을 통한 효율적인 유한요소망 개선에 관한 연구

성활경,조백희 國立 昌原大學校 産業技術硏究所 1992 産技硏論文集 Vol.6 No.-

Most of existing commercial finite element codes effectively provide solutions only for the given mesh pattern, but don't provide the information as to mesh refinement. Thus, a simple criteria based on h-refinement approach and maximizing strain energy in the element is proposed by using existing commercial finite element analysis code. The strain energy formulation and solution technique to effectively calculate strain energy of elements at each refinement level is studied. Finally, the criteria which developed by carrying out this study is examined by applying to mechanical structural problems.

뇌졸증 환자 가족보호자의 간호부담감과 관련된 요인

김활란,류소연 대한보건협회 2002 대한보건연구 Vol.28 No.2

This study was performed to investigate the associated factors with caregiving burden of stroke patient's caregivers. A survey was conducted with 137 main caregivers of stroke patients in the K general hospital, and two hospitals of oriental medicine located in Gwangju from Aug. 10, to Sept 30, 2001. A self-administrated questionnaire was used to survey the degree of abilities of daily living of stroke patients, the degree of family caregivers' depression, the burden of family caregiving and other characteristis of patients and family caregivers'. In order to find the association between the several variables and the burden of the family caregiving, t-test, ANOVA, correlation analysis, and stepwise multiple linear regression analysis were used. The results of the study were as follows: 1. the sex distribution of caregivers was 32.8% male, and 67.2% female. the age distribution was 21.2% in the thirties, 19.7% and 19.7% in the forties and fifties respectively, 19.0% in the twenties, and 14.6% in the sixties and over. The sex distribution of stroke patients was 6.79% male, and 32.1% female. 2. According to age, job, health condition, monthly incomes of each household, patients' expected recovery degree at discharge, and types of hospitals, the burden of family caregiving showed statistically significant difference. The result of correlation analysis showed the family caregiving burden was significantly correlated with caregivers' age, patients' the degree of abilities of daily living and caregivers' depression points. 3. The result of stepwise multiple regression analysis showed that caregivers' age, depression, patients' expected recovery degree at discharge and the degree of abilities of daily living were associated with the burden of family caregiving. It is thought that the more active studies on variables affecting the burden of family caregiving and the development of nursing arbitration programs which will be capable of lessening the burden of family caregiving will be needed hereafter.

亞·太地域內 投資活性化方案

李活蘭 조선대학교 경영경제연구소 1996 經營經濟硏究 = Management and economics research Vol.19 No.1

효과적인 의견조정을 위한 네트웍GDSS의 설계

장활식,이동호 釜山大學校 經營 經濟 硏究所 1999 經營 經濟 硏究 Vol.18 No.2

조직의 분산화가 증가하고 동시에 의사결정이 집단적으로 이루어지는 환경에서 의사결정지원시스템도 이러한 환경에 효과적으로 적응되어야 한다. 그러나 현재 구현된 시스템은 단순한 업무처리와 자료공유를 중점적인 설계의 기본으로 하고 있다. 그러나 의사결정자의 집단과 같은 다수의 의사결정자들간에 발생하는 의견의 차이를 조정하기 위한 방법이나 이를 구체적으로 구현할 모델은 아직 미흡한 편이다. 이러한 맥락에서 본 논문은 네트웍을 기반으로 하는 집단의사결정지원시스템에서 의사결정자의 인지도를 바탕으로 우선권이라는 개념을 통해 의사결정자들간 인지도의 조정을 통해 전체의사결정자의 총체적인 인지도를 유도하는 방법을 제안하고 있다.

ERP의 성공적 도입을 위한 조직 변화관리

장활식,김재정 釜山 大學校 經營 經濟 硏究所 2003 經營 經濟 硏究 Vol.22 No.1

일반적으로 기업의 정보기술에 대한 투자의 반 정도는 명백한 실패 또는 매우 불만족스러운 결과를 낳고 있다고 보고된다. ERP도 이러한 실패의 가능성을 내포하고 있으며 ERP구현의 실패사례 또한 보고되고 있는 실정이다. ERP가 갖는 경제적, 전략적 중요성은 체계적인 연구를 필요로 하는데, 따라서 ERP를 도입하는 기업에서는 ERP의 성공적인 도입에 영향을 미치는 변화유도요인과 개입전략 등을 비롯한 여러 결정요인들을 규명하고 이를 효율적으로 관리하는 것이 필요하다. 본 연구는 국내외의 문헌고찰을 통해서 ERP와 변화관리, ERP와 변화관리와의 상호관련성, 그리고 저항에 관련한 연구들을 살펴보고 이를 통해 연구 모형을 제시한다. 현재 시기적으로 상당수의 국내 기업들이 ERP시스템을 구축완료하고 운영하고 있는 상태이기 때문에 본 연구에서는 ERP의 도입을 완료한 기업을 대상으로 실증자료를 수집 분석하여 연구모형을 검증한다.

서비스 가치 관점에서의 e-정보서비스 사용 의도에 관한 연구

한정희,장활식 한국정보시스템학회 2004 情報시스템硏究 Vol.13 No.1

Recently, many e-business companies started to charge fees to the use of information contents service. However, little is known about how users evaluate and determine to purchase information services. Past technology adoption research has focused primarily on the positive utility gains side, focusing on usefulness and ease of use. Purchase of e-service, however, involves not only the position utilities but also negative utilities. This research uses the service value model(SVM) and explains user's intention of purchasing a new information service. Based on the Perceived Value Framework, this research investigates the impacts of the service quality and the fee charge on the user's perceived service value and further on user's intention of adopting the e-service. One of the most important postulations of this research is that both service quality and the fee charge influence user's intention through affecting the user's perceived service value. This research presences a conceptual model of users' e-service evaluation process. The conceptual framework provides a basis for understanding how perceptions of quality and sacrifice influence value perceptions and purchase intentions. The results of an empirical research suggest that the both service quality and fee charge have influences on the perceived service value. However, they do not directly affect user's intention to purchase the e-service. They affect user's intention to purchase through affecting the perceived service value. In conclusion, this research provides a base to build on for other research studying use intention model of new e-service.

열분해 튜브의 내면침탄에 따른 열응력 및 변형해석에 관한 연구

조경식,성활경 國立 昌原大學校 産業技術硏究所 1993 産技硏論文集 Vol.7 No.-

Ethylene is produced from a mixture of hydrocarbon feedstock and steam in a pyrolysis tubes. These pyrolysis tubes operating at high temperatures are subject to severe thermal stress, where carbon and/or carbon product get attached to the inner surface of the tubes. This phenomena in duces a localized temperature increase, which in turn enhances a local carburization process. Additional stress is produced due to localized volume expansion, and the change in thermal expansion coefficient. The carburization process eventually gives rise to building, bowing and crack of the pyrolysis tubes which therefore is known to be most critical process that decides the lifetime of the tubes. In this thesis, two dimensional analysis of the thermal stress and strain in the HK-40 pyrolysis tubes with varying carburization depths and was made using finite element methods. A commercially available NISA Ⅱ program was used on 16 different carburization models.