• Journal of the Korean Data and Information Science Society
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• 제14권2호
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• pp.385-391
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• 2003

A sequence of n Bernoulli trials which violates the constant success probability assumption is termed as "Poisson trials". In this paper, the recurrence formula for the r-th central moment of number of successes with n Poisson trials is derived. Romanovsky's method, based on the differentiation of characteristic function, is used in the derivation of recurrence formula for the central moments of conventional binomial distribution. Romanovsky's method is applied to that of Poisson trials in this paper. Some central moment calculation results are given to compare the central moments of Poisson trials with those of conventional binomial distribution.

• 산업경영시스템학회지
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• 제43권3호
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• pp.179-190
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• 2020

As the business environment is rapidly changing with globalization and complexity of information flows, the uncertainty is also very increased for project environment. Although many studies have been conducted to find out the critical factors for project success, there still exist different views to define project success. Furthermore, implementing success formula for one project does not necessarily guarantee a success for another project since there are other elements that impede the success of project. In this regards, it is imperative to examine what are the barriers to project success. This study aims to examine the barriers that impede the success of project. Past literature was thoroughly reviewed to collect and develop a preliminary list of elements that affected project performance negatively. Experts were interviewed to refine the list and the final list of the measurement items were developed. A survey questionnaire was developed with the final list of measurement items, and a survey was conducted on the practitioners with project experience. After the survey, an exploratory factor analysis was conducted on the final list to extract the component dimensions which in turn formed the group of project barriers. The exploratory factor analysis provided ten factors, which are difficulty of process management, failure of project feasibility analysis, cost overruns and lack of cost benefits, unclarity project plan, strategic consistency error, stakeholder conflict, inaccuracy of requirement definition, disturbance of communication, technical environment change, negative attitude of top management.

• Industrial Engineering and Management Systems
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• 제15권4호
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• pp.345-353
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• 2016

One of the main concerns of the present age, is attending to the issue of sustainability that in recent decades, the concept of it has grown in terms of recognition and importance. Sustainability have defined further the development of the welfare and living standards of the present generation, without the lives of future generations is at stake. One of these tasks of the business is project management and today, "green or sustainable project management" as one of the most important global trends of project management have been identified. The issue of present study was to investigate the relationship of sustainability factors with success of a project. The population of the research consists of directors of oil and gas in the South Pars region including 150 people that according to Cochran formula, the number of samples were obtained 108 people. In this study, data collection was conducted based on a structured questionnaire that from a sample set of questions was used for sustainability impact on 6 scale of project management success. For this purpose, the whole five-item Likert has been used. Also for statistical analysis, PLS software was used. The results of path analysis at confidence level of 95%, showed a significant relationship exists between "sustainability factor" and "project success criteria." Since the correlation coefficient is positive, so this type of relationship is positive. Thus all the hypotheses at confidence level of 95 percent was confirmed and it became clear that there is a significant positive relationship between "sustainability factors" and "project success criteria."

• 한국해안해양공학회지
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• 제6권3호
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• pp.275-280
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• 1994

바닥영향을 받는 수평원형 실린더에 작용하는 힘에 대한 해석해를 복소포텐셜을 이용하여 재유도하였다. 본 연구에서 해석해를 재유도한 이유는 Yamamoto 등(1974)이 유도한 해석해는 부가질량제수가 거동하는 경향을 정확하게 설명하지 못하고있기 때문이다. 재유도한 부가질량계수 CM은 Yamamoto 등(1974)의 $C_{M}$ 과 다르며, 또한 부가질랑계수가 거동하는 경향을 만족하게 설명하고 있음을 알 수 있었다.

• Clinical and Experimental Pediatrics
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• 제53권5호
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• pp.634-638
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• 2010

Purpose: In Kyung Hee East-West Neo Medical Center, Seoul, Korea, efforts to raise rooming-in care success rate have been undertaken since when the hospital was established in 2006. We intended to analyze our experience over the past 3 years of period and to discuss the advantages of rooming-in. Methods: We analyzed the rooming-in practice rate, failure rate, and the breast feeding rate. Subjects were 860 normal healthy neonates from June 2006 to June 2009. Results: Among these 860 cases, 83 babies were required separation out of rooming-in in the middle of the course. Among these 83 cases, 70 cases had to stop the course due to poor condition of babies and 13 cases due to maternal condition. 70 cases of infant's causes consist of 68 cases of NICU admission and 2 cases of poor feeding support. The other 13 cases of separation include refusal by maternal condition. Therefore the success rate of rooming-in for the last 3 years was 90.3%, that is 777 cases among the total 860 cases. The percentage of exclusive breast feeding was 64%, that of mixed feeding with breast and formula feeding was 25%, and formula feeding only was 11%. Conclusion: We experienced successful rooming-in care for the last 3 years. Nursery facilities should educate and encourage the advantages of rooming-in, including the good formation of attachment between mother and infant, emotional stability, protection from infection, and increased breast feeding rate so that rooming-in care can be fully established.

• 기술혁신연구
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• 제4권1호
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• pp.165-183
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• 1996

In acquiring and transferring a superior knowledge assesing the intermediate result value of a competitive R&D project is very important for a firm engaging in R&D. Most existing literatures on R&D evaluation are concerned with project selection and resource allocation. In this paper the stage of an R&D project is classified into research, exploratory development, and development. And a model is suggested which evaluates the intermediate result value before completion of development stage under duopoly and oligopolistic competition. Assessed value of the intermediate result transferred to the next tier company can be used as a minimum acceptable price to the inventor when more advanced knowledge acquired through R&D is transferred to the next tier one. The model suggested is composed of structural variables including research cost, success rates, potential profits, discount rate degree of competition. By using exponential distribution for invertion process time in each stage, we derive a formula that can assess the value of the intermediate result, and we demonstrate how the model can be applied to a competitive R&D situation through an example.

• 대한한의학원전학회지
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• 제36권4호
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• pp.55-67
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• 2023

Objectives : Contents on causes of male infertility, reproductive health improvement, sexual tips were studied in classical texts of Korean Medicine, followed by representative formulas for male infertility treatment. Methods : Related texts from the Qiusimen chapters of the Yixuerumen, Yixuexinwu, Donguibogam, Nukejinglun, Jiaozhufurenliangfang, Jiyingandmu were collected, and their medical meaning discussed. Results : As immoderate libido and excessive mental consumption leads to sexual dysfunction causing male infertility, 'moderating sexual desire and accumulating Jing' should be the principle for improving reproductive health. Also, sufficient foreplay is recommended. In terms of formula, the Wuziyanzongwan with sufficient therapeutic evidence in both classical texts and contemporary Korean Medicine can be applied in cases of male infertility. Conclusions : Excessive sensual stimulation and immoderate sexual desire consumes the mind and results in decline in male reproductive health. While moderating sexual desire and accumulating Jing through controlling desire, not overworking, moderating anger, drinking in moderation, balanced eating should be the principle for improving reproductive health, having sexual intercourse 2~3 times per week rather than long-term abstinence is recommended. To improve the success rate in pregnancy, sufficient foreplay and time should be done and taken for intercourse. Wuziyanzongwan should be taken for at least three months or longer.

• 해양환경안전학회:학술대회논문집
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• 해양환경안전학회 2003년도 춘계학술발표회
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• pp.153-158
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• 2003

Design of general steel structure had applied and achieve elastic design concept mainly so far. Because elastic design supposes that whole structure complies with elasticity formula as that achieve via allowable stress of material is concept that calculate stress distribution of construction about action external load and estimate load of when the maximum stress reaches equally with allowable stress that is established beforehand by maximum safety load of the structure. But, absence that compose actuality structure by deal with external load increase small success surrender and structure hardness falls and tell structure in limit state finally on the whole as showing complicated conduct by interference between these breakdown at buckling by compression. Examined closely about conduct of place since initial buckling through carbon vocal cords transformation finite element analysis series (ANSYS) that place mending condition supposes case that is boundary condition in this investigation.

• 한국컴퓨터정보학회:학술대회논문집
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• 한국컴퓨터정보학회 2017년도 제56차 하계학술대회논문집 25권2호
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• pp.89-92
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• 2017

This study critically analyzes the present situation of the domestic game industry that infringes game nature or diversity, which is the essence of game contents such as copycat, auto play, excessive billing inducement, indiscriminate advertisement developed by focusing on commercial aspect, It suggests the necessity of creative and various game development environment. It suggests development direction for the development of domestic game industry through game case analysis which shows the possibility of game media out of existing success formula and does not concentrate only on commerciality and makes effort to give new fun to users.

• 수산해양기술연구
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• 제27권1호
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• pp.83-90
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• 1991

현존하는 세장선 이론과는 아주 다르게 Kelvin 소오스와 그의 궤적 주위에 대한 점근전개를 행하여 전진 운동을 하는 세장체에 대한 공식을 유도하였다. 여기서 발전된 공식은 기본적으로 Neumann-Kelvin 문제의 Kernel함수에 대한 근사와 동등하게되었다. 경계치 문제는 현저하게 단순화되었으며 해는 선수 끝에서 시작하는 축차적분의 진행 절차에 따라 얻어졌다. 속도장과 압력분포는 2차원 속도 포텐시열의 미분에 의해 간단히 계산될 수 있었다. 이 방법은 비록 컴퓨터의 사용에는 Neumann-Kelvin문제처럼 많은 시간이 필요하게 되더라도 선체 주위의 유동장의 수치해석에 더욱 정확하리라는 가능성을 준다. 전진하는 진동 세장체의 문제에도 같은 방법이 유용하리라는 것을 또한 기대한다.