• 대한조선학회지
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• 제24권4호
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• pp.1-8
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• 1987

In this paper negative drift forces are discussed, which act on a two-dimensional cylinder exposed to slightly modulated waves in water of finite depth. By combining matched asymptotic expansion method with multiple scale technique, it is clearly shown that the slowly-varying drift force can be negative under certain circumstances: i) Incident waves are irregular or slightly modulated. ii) The water depth is finite compared to the wave length of carrier waves. iii) The gap between the keel of the cylinder and ocean floor is narrow. Then the negative drift forces are caused by the unbalance of hydrostatic force associated with set down. Real fluid and wave breaking effects are not considered.

• 한국프랜차이즈경영연구
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• 제1권1호
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• pp.1-17
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• 2010

프랜차이즈 가맹점의 계약 전 기대와 운영 후 지각된 성과에 대한 부정적 차이인식(gap)의 정도가 커지면 분쟁의 원인으로 발전할 수 있는데, 이는 근본적으로 가맹본부가 신규 가맹점 모집에 급급한 나머지 계약전 기대를 너무 높게 만들어 운영 후 지각된 성과와의 부정적 차이인식(gap)이 커지면서 발생하는 경우가 높다고 볼 수 있다. 따라서 본 연구에서는 가맹본부의 관계지향성에 대한 가맹점의 계약 전 기대와 운영 후 지각된 성과의 차이인식(gap)을 통해 가맹본부의 관계지향성에 대한 가맹점의 만족도를 간접적으로 측정하고, 관계지향성에 대한 차이인식(gap)이 프랜차이즈 업종별로 어떻게 다르게 나타나는지 알아보고자 한다. 본 연구의 실증분석 결과, 관계지향성에 대한 차이인식(gap) 평균이 모두 음(-)으로 나타난 것은 운영 후 지각된 성가가 계약 전 기대보다 낮다는 것을 의미하는 것으로, 가맹점 계약 전 기대관리의 필요성과 함께 프랜차이즈 업종별로 관계지향에 대한 차이인식(gap)이 다르게 나타났다는 것을 밝혔다는 데에서 그 의의를 찾을 수 있다. 이런 점들로 볼 때, 프랜차이즈는 가맹본부와 가맹점 간의 계약관계에 의해서 유지되는 시스템으로 지속적인 관계를 유지하기 위해서는 많은 노력과 함께 기대관리가 필요하다.

• 한국간호교육학회지
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• 제10권1호
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• pp.54-63
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• 2004

The purpose of this study is to identify the factors that influence stress experienced by nursing students and to provide a perceived causal structure model among these variables. The ultimate goal of this study is to develop efficient guidance to clinical nursing education in this population. This study intends to apply perceived causal structure: network analysis method which was developed by Kelly(1983), and has been applied in nursing research. This method is selected to show dynamic relationship of stressor using network method. Data was collected from convenient sample of 186 junior college nursing students who had the clinical practice experience during 10 weeks. Data collection and analysis was conducted in 2 steps from December, 9, 2002 to February, 8, 2003. Step 1.: Data was collected using literature review(10 articles) to identify the causes of stress. Nine causes of stress were extracted. Step 2.: As perceived casual structure network study, data was collected using questionnaires which included 9 extracted cause and stress. The questionnaire contained a 10 X 10 grid table with 10 causes and effects printed. In network analysis, 'Yes' was scored as 1, 'No' was scored as 0, and the mean(maximum 1, minimum 0) was calculated. Construction of the network under inductive eliminative analysis which stopped the construction of the network when the consensual agreement level dropped near 50% was proceeded by adding causes in order of the mean rating level. In this study, construction of the final network was stopped by consensual agreement level of 52% of the total subjects. The results are summarized as follows : Step 1: Investigation of the causes of stress ; The extracted causes of stress from quality data was identified 9 categories ; negative nurse, lack of clinical practice opportunity, ambiguous role, negative patient, lack of nursing knowledge and skill, difficult of personal relations, inefficient clinical practice guidance, gap of theory and practice, lack of support. Step 2 : Construction of the perceived causal structure model ; 1) The most central cause of stress is ambiguous role in the systems of causation. 2) The distal cause of stress is inefficient clinical practice guidance 3) The causes that have a number of outgoing link are negative nurse, ambiguous role. 4) The causes that have a number of incoming link are ambiguous role, gap of theory- practice, lack of clinical practice opportunity, lack of nursing knowledge- skill. 5) There is a mutual relationship between stress and difficult of personal relations, stress and ambiguous role, ambiguous role and negative nurse, ambiguous role and lack of clinical practice opportunity, ambiguous role and lack of nursing knowledge-skill, lack of nursing knowledge-skill and gap of theory- practice. In conclusion, the network suggests that the first centre cause is related on ambiguous role and the second on negative nurse, inefficient clinical practice guidance in the systems of causation

• 한국정보디스플레이학회:학술대회논문집
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• 한국정보디스플레이학회 2007년도 7th International Meeting on Information Display 제7권1호
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• pp.123-126
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• 2007

In this study, a high luminous efficacy AC-PDP panel with long discharge gap and grooved dielectric layer has been studied. By applying this high efficacy concept and optimized driving waveform featuring negative biased sustain, ${\sim}2.6lm/W$ of luminous efficacy was achieved in 42- inch HD panel. Modified fabricating process and new discharge cell structure were investigated to obtain improved uniformity and operating characteristics.

• 산업경영시스템학회지
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• 제24권62호
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• pp.89-95
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• 2001

This research developed a survey and analyzed the results on the basis of the SERVQUAL model and prior research of the service quality in MIS. The result of the analysis will maybe show that the gap between expectations and perceptions of users will have an negative Impact on the user satisfaction of IS. And outsourcing strategy will have an impact on the user gap. The most important outcome of this study is that service quality is an antecedent of IS users, and we should consider service quality in improving and measuring IS effectiveness

• 대한조선학회논문집
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• 제43권4호
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• pp.422-430
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• 2006

The horn and movable parts around the gap of the conventional semi-spade rudder are visualized by high speed CCD camera with the frame rate of 4000 fps (frame per second) to study the unsteady cavity pattern on the rudder surface and gap. In addition, the pressure measurements are conducted on the rudder surface and inside the gap to find out the characteristics of the flow behavior. The rudder without propeller wake is tested at the range of $1.0{\leq}{\sigma}_v\;1.6$ and at the rudder deflection angle of $-8{\leq}{\theta}{\leq}10^{\circ}$. The time resolved cavity images are captured and show strong cavitation around the rudder gap in all deflection angles. As the deflection angle gets larger, the flow separated from the horn surface increases the strength of cavitation. The accelerated flow along the horn decreases its pressure and the separated flow from the horn increases the pressure abruptly. The pressure distribution inside the gap reveals the flow moving from the pressure to suction side. In the negative deflection angle, the turning area on the movable part initiates the flow separation and cavitation on it.

• 한국도서관정보학회지
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• 제49권2호
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• pp.179-199
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• 2018

본 연구의 목적은 학생이 가진 경제적 여건의 차이, 즉 교육격차에 따른 기초적 정보활용능력의 상관관계를 분석하는 데에 있다. 이를 위해 첫째, 학교별 정보활용교육 경험의 차를 통제할 수 있는 고등학교 1학년 629명을 대상으로 3월에 정보활용능력에 대한 자기 평가를 실시하였다. 더불어 학교 정보공시에 제시되는 학교별 고교 학비 지원 학생 비율로 학생들의 경제적 여건에 따른 학교별 교육격차를 확인하였다. 그리고 교육격차와 정보활용능력 간 상관관계를 분석하였다. 그 결과, 학교별 고교 학비 지원 학생 비율로 설명할 수 있는 교육격차와 정보활용능력 간에 통계적으로 유의미한 음의 상관관계를 강하게 갖는 것으로 조사되었다. 둘째, 교육격차가 정보활용능력에 미치는 영향 관계를 분석하기 위해 "도서관과 정보생활" 교과의 I II 영역별 회귀분석을 실시하고 교육격차에 따른 정보활용능력 점수의 회귀방정식을 도출했다. 이러한 연구 결과는 정보활용능력 격차를 완화시켜 갈 학교도서관의 교육적 역할을 강조하는 근거로 활용할 수 있을 것이다. 그리고 체계적 정보활용교육의 제도화를 통해 이상적인 수준의 정보활용능력과 자기주도적 학습력 함양으로 교육격차를 보다 직접적이고 효율적으로 해소하는 발판이 될 수 있도록 해야 할 것이다.

• 한국연소학회:학술대회논문집
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• 한국연소학회 2004년도 제28회 KOSCO SYMPOSIUM 논문집
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• pp.37-41
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• 2004

Quenching phenomena is one of major concern in development of millimeter or sub-millimeter scale micro combustor for the size of the combustor is near extinction condition. In this work we focused on the effect of combustor wall condition that was parameterized by Perovskite LSC($La_{0.8}$$Sr_{0.2}$$CoO_3$) redox catalyst. The experiment was done by variable gap-width 2D wall equipment. The flame was produced by premixed methane-air jet issuing from millimeter-scale slot burner and it propagated through the narrow gap of the walls. By comparison of flame behaviour near catalyst-coated wall and simple glass wall, we investigated the effect of possible surface reaction on quenching phenomena. The flame between two plates was observed where the gap of the plates was reduced stepwise from 20mm to a distance of quenching occurrence. The two flames with and without surface modification were almost same by observation. But the gap for the occurrence of quenching was increased between catalyst-coated wall. So we concluded that surface reaction close to combustor wall has a negative effect on micro combustion.

• 한국생활과학회지
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• 제17권2호
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• pp.279-292
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• 2008

The concept of "new consumer sovereignty" is playing a significant role in having the initiative of production and consumption of technology and culture trend. Today the 'new consumers' positively use digital and information technology in purchasing. To understand these consumers' new purchase tendency, the study examined the actual conditions 1) of consumers' use of digital and information technology, 2) of digital devide between consumers, and 3) the consumer's attitude to changes of their lifestyle which digital convergence could result in. The subjects were thousand male and female adults. The data were collected from a survey conducted by Embrain, a research firm in Seoul, in the period of June 1st, 2007 ${\sim}$ June 10th, 2007. The results show: 1. Most subjects have computers, their Internet use is their general life, and they have lots of exposure opportunities to digital information. They positively and actively use information technology. 2. Between male and female subjects, and between old and young generation there is a significant digital gap. But the gap between regional areas is statistically not significant. 3. The subject's attitude to digital convergence society shows both positive expectation and negative concerns. Concludingly, to embody a desirable digital convergence society, it is necessary to be searched the ways which can decrease the digital gap and policy to share benefit that information technology can give to consumers.

• 대한전기학회:학술대회논문집
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• 대한전기학회 1995년도 추계학술대회 논문집 학회본부
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• pp.435-437
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• 1995

It is important to understand tile behaviours of tile high pressure DC glow discharge with a micro gap inside a pixel of the plasmas display panel. We prepared a narrow gap discharge system and have measured electron temperature and density by means of double probe methods in high pressure which was between 100torr and 200torr. And the electrode gap was 7mm. When the pressure varied from 100torr to 200torr, the negative glow was created at a distance less than 1mm from the cathode. And the length of the faraday dark space decreased from 8mm to 5mm. Hence probe measurements was mainly, performed in the region of the Faraday dark space. The dependence of electron temperature and density on the pressure and current density was same with that of the general flow discharge, i.e. as the pressure increased the electron temperature decreased and the density increased. But the spatial electron density distribution in the Faraday dark space was highly distorted because of the effect of high pressure.