• Journal of Advanced Research in Ocean Engineering
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• 제4권2호
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• pp.78-85
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• 2018

This paper presents a study of the effects of the free surface to marine propeller including the mesh effect of the models. In the present study, we conduct the numerical simulation for propeller performance employing the openwater test. The numerical simulations compare the meshing strategies for the propeller and show the effects on both thrust and torque. OpenFOAM is applied to solve the propeller problem and then open water performances of KCS propeller (KP505) are estimated using a Reynold-averaged Navier-Stokes equations (RANS) solver and the turbulence of the $K-{\omega}$ SST model. Unstructured meshes are used in the numerical simulation employing hexahedral meshing for mesh generation. The arbitrary mesh interfacing (AMI) and multiple rotating frame (MRF) are compared to define the best meshing strategy. The meshing strategies are evaluated through 3 classifications, i.e., coarse, medium, and fine mesh. Thus, the propeller can be performed utilizing the best mesh strategy. The computational results are validated by comparison with the experimental results. The $K_T$, $K_Q$, and efficiency of the propeller are compared to an experimental result and for all of the meshing strategies. Thus, the simulations show the influence of meshing in order to perform the propeller performances.

• 가족자원경영과 정책
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• 제16권2호
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• pp.19-39
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• 2012

Many students who attend university are worried about their future employment and academic achievement. Self-leadership is the ability to deal wisely with employment matters and to recognize the employment strategies of students who display self-leadership qualities. For this purpose, 320 questionnaires were distributed to students attending universities in Seoul. The 304 collected questionnaires were used as data for the final analysis. First, the university students' average self-leadership rate was 3.73, and their average employment rate was 3.24. In terms of self-leadership by subordinate domains, the most common strategy was to introduce "natural compensation activities", and the least common strategy was to focus on "inner compensation". For the employment strategy, "academic credit" was the best managed, and "active behavior" was the least well managed. Second, in terms of the differences in self-leadership due to social demographic variables, the self-leadership levels showed significant differences, according to their credits in general. Furthermore, they showed significant differences depending on gender and the leadership experience among the subordinate variables. Moreover, the university students' employment strategies showed significant differences according to gender, leadership experience and leadership education. Third, in terms of the difference between self-leadership and employment strategies due to psychological variables, self-efficacy and university-life satisfaction levels made significant differences in terms of self-leadership. Fourth, the group with high self-leadership levels also had highly developed employment strategies, compared to the group with low self-leadership levels. Fifth, after analyzing the social demographic variables, the psychological variables and the influence of self-leadership, it appears that the explanation level increased at each step. This study demonstrates that experiencing many opportunities that promote self-leadership during university causes students to worry about their future careers and prohibits them from developing into independent, responsible adults who can accomplish their goals.

• 한국의류학회지
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• 제34권9호
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• pp.1454-1469
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• 2010

Brands have their own life cycles and exert a great influence on the marketing activities of companies. This study examines the marketing activities according to a brand life cycle and measures the scope of their performances. The research divides a fashion brand life cycle into three stages through the analysis of secondary data, and validates the causal relationship between marketing activities, brand equity, and consumer behavior according to the brand life cycle. A total of 573 responses were analyzed through a factor analysis, path analysis, and paired t-test with SPSS 12.0. The results are as follows: According to the analysis of the relationship between marketing mix and brand equity, distribution strategies are effective at the introduction/growth stage and the continuation stage. Advertisement strategies should be a main focus at the maturity stage for brand awareness. Throughout all the stages, product strategies wield the greatest influence on the brand image. Among brand equity components, the brand image has an influence on consumer behavior at every stage of the cycle while the brand awareness has no significant effect on consumer behavior. The marketing mix component that has the greatest impact on consumer behavior is product. Contrary to general expectations, price has a negative or insignificant effect on consumer behavior at every stage of the cycle. The results illustrated in this study help to understand the life cycle of fashion brands and characteristics different from consumer goods. Thus, fashion companies should identify at which stage their brands are positioned and develop different strategies to fit each stage.

• Nuclear Engineering and Technology
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• 제26권2호
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• pp.168-178
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• 1994

사고관리란 사고발생시에 이용가능한 모든 자원, 즉 인원과 설비를 효율적으로 활용함으로써 발전소를 안전상태로 회복시키거나 사고의 피해를 완화시키기 위한 제반 활동을 말한다. 사고관리의 접근방식은 첫째, 후보사고관리방안의 사전 평가, 둘째, 효과적으로 적절한 조치를 수행하게 하는 세부 절차서의 개발, 그리고 셋째, 그러한 조치수행에 필요한 도구와 자원의 준비, 실현 가능한 원전 시스템의 변경등을 포함한다. 사고관리 전략을 평가할 때에는 그 전략의 효율성분만 아니라 부작용, 타당성, 필요한 정보, 기존 절차서와의 양립성 등을 종합적으로 고려하여야 한다. 이 논문의 목적은 여러가지 사고관리 전략을 모델링하고 평가하기위한 체제를 개발하기 위한 의사결정 수목과 영향도의 해석도구를 소개하는 것이다. 이 해석도구와 관련한 여러가지 특징들이 제시되었으며 이 해석도구에 근거하여 세워진 사고관리전략의 평가체제가 간단한 예제문제에 적용되었다.

• 공학교육연구
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• 제15권6호
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• pp.9-18
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• 2012

The purposes of this article are to analyze the conditions of using instructional strategies and using gender sensitive instructional strategies at engineering classes of K University. Qualitative analysis methods were adapted. To achieve the purposes, 35 hours of engineering classes from 11 professors from 9th to 20th of November 2009 were videotaped and analyzed. The research findings were discussed by the checklists for general and gender sensitive the instructional strategies which were recommended for the managing the better classes. Students are influenced by professors not only knowledge and skills but also values and attitudes. Professors who take gender sensitive instructional strategies are expected to give good influence the women students.

• 수산해양교육연구
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• 제16권1호
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• pp.35-49
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• 2004

The purpose of this study is to examine the effects of scaffolding instruction on motivated learning strategies and academic achievement. Subjects of this study were 96 middle school first grade students in Busan, who were randomly assigned to two experimental group and one control group. The one experimental group had received scaffolding instruction by teacher, and the other experimental group had received scaffolding instruction by the interaction of peers. Control group were given traditional lessons only by the method of lecture. Students were given English Academic Achievement Test, Motivated Strategies of Learning Questionnaire. T test and ANOVA were used to analyze date. The results of this study showed that scaffolding instruction by ZPD turned out to have a positive influence on motivated learning strategies and academic achievement.

• 영어어문교육
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• 제15권4호
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• pp.37-54
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• 2009

This study investigated vocabulary learning strategies used by EFL middle school learners in Korea and examined the relationship between the middle school learners' vocabulary learning strategy (VLS) use and their vocabulary proficiency level. One hundred and forty-one students in a public middle school participated in the study and the data for this study were collected from a vocabulary learning strategy questionnaire and a vocabulary proficiency test. Based on the result of the vocabulary proficiency test, the participants were divided into three proficiency groups: high-, mid- and low- level proficiency groups. The overall findings of the study revealed that the participants used cognitive strategies most frequently and social strategies least frequently. The most frequently used individual strategies were 'using a bilingual dictionary,' 'studying the sound of a word' and 'practicing words through verbal repetition.' The least frequently used ones were 'interacting with native speakers' and 'studying or practicing the meaning of a word in a group.' The research results also showed that the vocabulary proficiency level has a significant influence on the vocabulary strategy use. The more proficient learners used vocabulary learning strategies more actively. More specifically, the high proficiency level group used metacognitive strategies the most. The middle and low proficiency groups used cognitive strategies the most. It is suggested that language teachers should facilitate the vocabulary learning process by helping learners develop appropriate strategies.

• 한국보육지원학회지
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• 제11권3호
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• pp.45-62
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• 2015

본 연구는 영아교사의 스트레스 대처방안과 원장의 감성리더십이 이직의도에 미치는 영향을 규명하기 위해 실시되었다. 강원도에 소재한 어린이집에 재직 중인 156명의 영아교사를 대상으로 설문지를 통한 조사를 실시하였는데, 스트레스 대처방안 질문지(박창순, 2005), 이직의도 질문지(안재현, 2014)와 원장의 감성리더십 질문지(구자영, 2012)를 사용하였다. 결과 처리를 위해 빈도분석, 신뢰도 검증, Pearson의 적률상관분석, 회귀분석을 실시하였다. 연구결과 첫째, 영아교사의 문제중심 대처방안 및 원장의 감성리더십이 높아질수록 이직의도가 낮아졌다. 또한 원장의 감성리더십이 높게 발휘될수록 영아교사의 스트레스 대처방안 가운데 문제중심 대처방안과 사회적 지지 추구가 높아졌다. 둘째, 영아교사의 문제중심 대처방안은 이직의도에 부적인 영향을 주었다. 셋째, 원장의 감성리더십은 영아교사의 이직의도에 부적인 영향을 주는 것으로 나타났다. 본 연구는 영아교사의 이직의도를 감소시킬 수 있는 방안으로 교사의 스트레스 대처방안과 원장의 감성리더십을 증진시킬 수 있는 프로그램을 개발하는데 기초정보를 제공할 수 있다.

• 디지털산업정보학회논문지
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• 제12권3호
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• pp.311-325
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• 2016

This study aims to investigate strategies for attracting consumers in Urban Entertainment Centers and understand the relationship between user satisfaction and intention of revisiting. To accomplish this, the strategic attraction factors were set as functional, experiential, episodic, and semantic. The relationships between these factors and revisiting intentions were studied experimentally. The result of the study can be summarized to 3 points. First, the 4 strategic factors that were selected all had a significant influence on revisiting intention. Therefore the more these factors have an influence, the higher the satisfaction and revisiting intentions. Secondly, out of the attraction factors the one with the biggest influence to customer satisfaction turned out to be 'functional factors' which is related to convenience, accessibility and availability. The factor that had the biggest influence on revisiting intentions turned out to be 'semantic factors' which is related to events, unusualness and temporality. Through this result we can see that to enhance satisfaction 'functional factors' should be considered first and to increase revisiting intentions 'episodic factors' should be considered first. Thirdly, it could be assumed that satisfaction of the visitors could boost intentions of revisiting.

• 컴퓨터교육학회논문지
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• 제5권2호
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• pp.79-89
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• 2002

최근 컴퓨터와 인터넷이 급속히 보금됨에 따라 컴퓨터게임이 아이들의 놀이문화로 급속히 자리를 굳히고 있다. 게임과 아이들을 따로 떼어놓고 생각할 수 없다면 게임을 긍정적으로 활용하기 위하여 게임과 학습의 관계를 알아보고자 하는 노력이 필요하다. 따라서, 본 논문에서는 각 종류의 게임이 학습자에게 요구하는 전략이 매우 다양하기 때문에 게이머는 게임을 하기 위한 여러 가지 전략을 모색하여 게임에 임하게 된다. 이 컴퓨터 게임에서의 전략이 학습자의 인지구조에 따른 어떤 학습전략을 얻을 수 있다면 그것이 학업성취도에는 어떤 영향을 미치는지 밝혀보고자 한다.