• Transactions of the Korean Society of Mechanical Engineers
• /
• v.17 no.1
• /
• pp.172-181
• /
• 1993

Pseudo-Brayton cycle is defined as an ideal Brayton cycle admitting the difference between heat capacities of working fluid during heating and cooling processes. The endo-pseudo-Brayton cycle which is a pseudo-Brayton cycle with heat transfer processes is analyzed with the consideration of maximum power conditions and the results were compared with those of the endo-Carnot cycle and endo-Brayton cycle. As results, the maximum power is an extremum with respect to the cycle temperature and the flow heat capacities of heating and cooling processes. At the maximum power condition, the heat capacity of the cold side is smaller than that of heat sink flow. And the heat capacity of endo-Brayton cycle is always between those of heat source and sink flows and those of the working fluids of pseudo-Brayton cycle. There is another optimization problem to decide the distribution of heat transfer capacity to the hot and cold side heat exchangers. The ratios of the capacies of the endo-Brayton and the endo-pseudo-Braton cycles at the maximum power condition are just unity. With the same heat source and sink flows and with the same total heat transfer caqpacities, the maximum power output of the Carnot cycle is the least as expected, but the differences among them were small if the heat transfer capacity is not so large. The thermal efficiencies of the endo-Brayton and endo-Carnot cycle were proved to be 1-.root.(T$_{7}$/T$_{1}$) but it is not applicable to the pseudo-Brayton case, instead it depends on comparative sizes of heat capacities of the heat source and sink flow.w.

• Journal of the Korean Data and Information Science Society
• /
• v.23 no.1
• /
• pp.39-51
• /
• 2012

Cluster analysis has proven to be a useful tool for investigating the association structure among genes and samples in a microarray data set. We applied several cluster validation measures to evaluate the performance of clustering algorithms for analyzing microarray gene expression data, including hierarchical clustering, K-means, PAM, SOM and model-based clustering. The available validation measures fall into the three general categories of internal, stability and biological. The performance of clustering algorithms is evaluated using simulated and SRBCT microarray data. Our results from simulated data show that nearly every methods have good results with same result as the number of classes in the original data. For the SRBCT data the best choice for the number of clusters is less clear than the simulated data. It appeared that PAM, SOM, model-based method showed similar results to simulated data under Silhouette with of internal measure as well as PAM and model-based method under biological measure, while model-based clustering has the best value of stability measure.

• Journal of KIISE:Software and Applications
• /
• v.29 no.3
• /
• pp.167-179
• /
• 2002

In this paper, we propose a new acoustic model for characterizing segmental features and an algorithm based upon a general framework of hidden Markov models (HMMs) in order to compensate the weakness of HMM assumptions. The segmental features are represented as a trajectory of observed vector sequences by a polynomial regression function because the single frame feature cannot represent the temporal dynamics of speech signals effectively. To apply the segmental features to pattern classification, we adopted segmental HMM(SHMM) which is known as the effective method to represent the trend of speech signals. SHMM separates observation probability of the given state into extra- and intra-segmental variations that show the long-term and short-term variabilities, respectively. To consider the segmental characteristics in acoustic model, we present segmental-feature HMM(SFHMM) by modifying the SHMM. The SFHMM therefore represents the external- and internal-variation as the observation probability of the trajectory in a given state and trajectory estimation error for the given segment, respectively. We conducted several experiments on the TIMIT database to establish the effectiveness of the proposed method and the characteristics of the segmental features. From the experimental results, we conclude that the proposed method is valuable, if its number of parameters is greater than that of conventional HMM, in the flexible and informative feature representation and the performance improvement.

• Journal of dental hygiene science
• /
• v.15 no.4
• /
• pp.495-502
• /
• 2015

In this study, it was to understand the factors influencing choice conviction of dental hygiene major graduate school of dental hygienist. This study aims to provide the basic data for developing the dental hygienic profession. The study method was complete enumeration of the master's graduate 84 students majoring in dental hygiene in the country 8 graduate school. The results of this study, the analysis of the differences between the external factors and internal factors of graduate school choice, factors of financial accessibility factor related marriage factor. Factor of the education program were more unmarried. The average monthly income was found to have recognized high financial accessibility of factors, education program. Also the carrier is low, factor of the education program it was found to be high. The result of graduate school choice conviction, the more unmarried chosen choice conviction score in high, it choice conviction score was related to monthly income. The result of correlation analysis, external reputation, future, education program if high, it was found to have conviction of graduate school. In graduate school choice conviction external factors of education program and future factor was found to influence the choice of graduate school but internal factors was not found to influence. Therefore, we must seek the support measures that can deepen the sustainable development and dental hygiene of the dental hygienist.

• Journal of the Korean Society of Clothing and Textiles
• /
• v.26 no.12
• /
• pp.1727-1738
• /
• 2002

세계화, 국제화, 개방화 시대에 살고 있는 우리가 통과의례나 전통 명절과 같은 특별한 행사에 의례복으로 한복을 애용하는 것은 한복이 한국의 문화적 이미지를 강하게 간직하고 있는 한국적 조형물 중의 하나이기 때문이다. 더우기 의례복은 특별한 행사 자체를 위해 착용되었던 만큼 당시대의 내 적 가치를 가장 현저하게 표출하고 있는 복식으로 인정 할 수 있기 때문이다. 본 연구의 목적은 시대 적으로 현대 전통 한복의 기본 형 식을 제공한 조선시대와 그 이후의 복식 중에서 특히 분명한 착용동기와 목적, 복식을 통해 나타내고자 하는 상징성 등을 함축하고 있는 아동용 의례복을 대상으로 복식의 형태, 색채, 문양, 소재 등의 조형 요소를 고찰하는 것이다. 또한 양식적 특성을 살펴보고, 그러한 조형적 특성을 형성시킨 당시대의 사상적 가치를 추론해 보는 것이다. 구체 적인 연구 방법은 먼저 관련된 문헌 고찰을 통한 이론적 배경을 토대로 하여 아동용 의례복의 범주를 설정하고 현재 보전중인 실물과 또는 사진, 풍속화에 나타난 복식 자료들을 수집하였다. 그리고 당시대의 사상적 배경에 대한 고찰을 병행하여 이들에 내재된 문화적 가치를 추출해 보았다. 연구 결과 양식적 특징으로는 남아의 두루마기나 전복 그리고 쓰개류 등에서 기능성을 고려한 변형적 양식이 나타나고 있었다. 색채 역시 음양 보색이나, 오행색을 바탕으로 한 기본색의 구성 이외 에도 소매나 섶에 응용된 색의 배열이나 맞깃 전복의 깃에 나타난 색의 조화는 다양한 색의 조형미를 표현하고 있었다. 특히 색동 등에 나타난 오행색의 배열, 안감과 겉감, 상의와 하의, 외의와 내의에 사용된 색의 조화는 미의식에 관한 문화적 가치를 추론해 볼 수 있다. 더우기 장식 표현에 주로 쓰인 자연물 문양이나 글자 문양은 당시의 지배 사상이 지향하는 덕목 이외에도 전통적으로 내재된 수명과 복록, 부귀와 영화에 대한 내적 가치들을 반영하는 조형적 상징들이라 할 수 있다. 소재는 비교적 계절을 고려하여 사용되고 있었지만 의례적 성격을 지닌 외의나 쓰개류의 경우 계절적 구분을 고려하지 않은 경우도 많이 나타나고 있었다. 장신구의 경우는 많이 사용되는 것은 아니나 역시 상징적 인 가치를 표현하는 실물들을 미적으로 재구성한 사례들이 나타나고 있었다. 이상의 연구를 통해 아동용 전통 의례복은 형태, 색채, 문양, 소재, 장신구 등에서 양식의 다양성과 변형들을 알 수 있었다. 또한 적극적인 내적 가치의 상징들을 복식을 통해 표현하고 있었음을 알 수 있었다. 현대 복식의 디자인에 있어 아동용 의례복에 나타난 창조적인 양식의 변형과 다양성 그리고 복식을 통한 내적 가치의 반영 등이 현대 사회와 조화를 이룬 실질적인 복식 디자인 제시 및 창작에 작은 영감으로 작용하길 바란다.

• Journal of the Korea Academia-Industrial cooperation Society
• /
• v.16 no.7
• /
• pp.4711-4722
• /
• 2015

This study was performed to determine the smartphone addiction and it's association with various related factors such as sociodemographic characteristics, family life characteristics, school life characteristics, health related characteristics, psychosocial factors(self esteem, anxiety, locus of control) among the middle school students in rural areas. The self-administered questionnaire were given to 630 middle school students during the period from May 1st to 31th, 2014. As a result, the distribution of smartphone addiction group among all subjects was 24.1%, and smartphone addiction is so complicatedly influenced by various factors as well as sociodemographic characteristics, school life characteristics and health related characteristics, to a greater extent, by self esteem, anxiety and locus of control. Therefore the effective strategy for decrease of smartphone addiction among the middle school students requires the efforts to improve their psychosocial factors.

• Korean Journal of Construction Engineering and Management
• /
• v.14 no.3
• /
• pp.176-186
• /
• 2013

For urban renewal projects progressing in large scale, it carries a characteristic that frequently changes the environment, subject, law, plan and the like by a demand from various participants and internal/external factors. As such large-scale urban renewal projects have a lot of possibilities of change, it requires setting a plan to recognize the possible variable factors by each project operation stage and to manage it systematically by defining the variable factors on the basis of working process of the entire project. Therefore this research has produced a factor of main variable management based on working process for systematic variable management on the projects that inherent various possibilities of change as urban environment refurbishment projects. And it also suggests the status of main variable factors characterized by project operation stages quantitatively through reflecting external and internal features for variable factors produced from utilizing ANP methodology.

• Asia-Pacific Journal of Business Venturing and Entrepreneurship
• /
• v.14 no.5
• /
• pp.187-200
• /
• 2019

The main purpose of this study is to investigate the effects of motivation of the employment in Korea with gender, nationality, motivation of studying in Korea, major satisfaction and Korean proficiency level of foreign students who are studying in Korea. The second purpose is to analyze the current factors, to leverage educational management and to make and support some policy of Minister of Education for international students in order to promote utilization of employment of the students in Korea during 4 years of studying. This paper is used by IBM SPSS Statistics 24 Version for data analysis. As a result of the analysis, the average of students in Southeast Asia, Central Asia and South and North America Africa was higher than Japan and China in terms of motivation of employment in Korea. First, the external motivation to study in Korea has affected TOPIK with positive influence. Second, in the relationship between motivation to study in Korea and the majors satisfaction, the higher the internal motivation of study, the higher the majors' satisfaction level. Third, in the relationship between motivation to study in Korea and motivation of the employment in Korea, internal motivation to study has a positive effect on motivation of the employment. As internal motivation increases, grade of the motivation of the employment increases. Fourth, the relationship between major satisfaction and employment showed positive (+) effect. In other words, the higher the major satisfaction, the higher the motivation of the employment. Fifth, TOPIK has a negative effect on motivation of the employment. It means that external motivation was the main factor that positively influenced TOPIK and internal motivation was also main factors that positively influenced both major satisfaction and motivation of the employment in Korea. Sixth, when the internal motivation has an effect on motivation of Korea employment, the higher the major satisfaction as the parameter, the higher the motivation of Korea employment. Therefore, it will be helpful to understand the meaning of studying motivation and major satisfaction of international students, and to be used as basic data on education policies of universities and governments supporting the career and employment for international students.

• Journal of the Korean BIBLIA Society for library and Information Science
• /
• v.22 no.1
• /
• pp.79-93
• /
• 2011

This study aims to analyzed the treatment factors in the reading activities in order to examine the possibility for such factors to applied to the actual life of the old, and sought for the utilization and direction of the reading program that is presented as the treatment and prevention of the emotional problems of the old people. Considering such circumstances, involving in reading activities improves the quality of the old people's life by meeting their internal desire by themselves and giving the meaning to their life with creativity. In addition, the reading activities helps the old people to express in-depth conflicts, emotion, desire and thinking that they are routinely experiencing, thus leading to the treatment of their agony, trauma, and pain. In such sense, it is very meaningful for the elderly to be joined in any reading activities.

• Proceedings of the Korean DIstribution Association Conference
• /
• 2006.02a
• /
• pp.105-136
• /
• 2006

이 연구는 농협 하나로마트를 표본점포로 하여 슈퍼마켓의 점포성과에 미치는 영향요인을 규명하기 위한 것이다. 기존의 유통관련 선행연구가 소비자조사를 통한 점포선택이론 중심으로 접근하였다면, 본 연구는 소매공급 측면에서 접근했다는 점과 소매입지모델 뿐만 아니라 소매경영이론 측면에서 내적요인까지 아울러 접근함으로써 슈퍼마켓의 점포성과에 대한 영향관계를 종합적으로 접근하여 규명하고자 시도하였다는 점에서 그 의의를 갖는다. 본 연구의 접근은 슈퍼마켓 경영에서 환경요인인 외적요인과 역량요인인 내적요인에서 점포성과에 영향을 미칠 것으로 기대되는 다양한 변수들을 선정하고, 이 변수들에 대한 검증을 통해 슈퍼마켓의 점포성과에 미치는 영향관계를 분석하였다. 분석의 신뢰도와 설명력을 높이기 위하여 변수별, 요인별 접근을 시도하였으며, 대상점포의 설명력을 높이기 위하여 동업계 편균대비 비교분석과 도시와 농촌간의 입지유형별 특성과 차이점을 규명하고자 하였다. 연구결과 현실적 측면에서 채용가능한 결과를 도출할 수 있었다. 본 연구가 대형 슈퍼마켓이 향후 유망업태로 주목받고 있는 상황에서 농협 하나로마트를 표본으로 하여 슈퍼마켓의 점포성과에 영향을 미치는 요인을 규명하고자 하였으나, 향후 슈퍼마켓의 점포출점, 전략수립, 점포운영 등에서 실질적인 방향성을 제시할 수 있도록 연구가 보강되어야 할 것이며, 나아가 타 업태 및 업종에 일반화될 수 있도록 기대한다.