• 정보과학회 논문지
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• 제44권5호
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• pp.522-536
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• 2017

키워드 추출은 주어진 문서로부터 문서의 주제나 내용에 관련된 단어들을 추출해내는 방법으로 대량의 문서를 다루는 텍스트마이닝 연구들이 전처리에서 공통적으로 거치는 대표 자질 추출에서 중요하게 활용될 수 있다. 본 논문에서는 하나의 문서의 주제에 적합한 키워드를 추출하기 위해 문서에 출현한 단어들 사이의 동시출현관계, 동시출현 단어 쌍 사이의 출현 종속 관계, 단어들 사이의 공통 부분단어 관계 등의 다양한 관계들을 특징으로 활용하여 구축한 계층적 그래프 모델을 제안하고, 그래프를 구성하는 정점(Vertex)들의 중요도를 평가할 때 입력 간선(Edge)에 의한 영향뿐만 아니라 출력 간선에 의한 영향도 고려한 새로운 중요도 산출 방법을 제안하며, 이를 토대로 점진적으로 키워드를 추출해내는 방안을 제안한다. 그리고 제안한 방법의 정확성과 주제적 포괄성 검증을 위해 다양한 분야의 주제를 가진 문서 데이터에 다양한 평가방법을 적용해 기존의 방법보다 전체적으로 더 나은 성능을 보임을 확인하였다.

• 한국콘텐츠학회논문지
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• 제13권6호
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• pp.236-245
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• 2013

본 연구는 노인자살증가의 원인을 파악하기 위해 거시적인 측면의 관점에서 노인자살률과 사회 경제적요인의 관련성을 분석하였다. 노인자살의 이론적 배경은 사회학적 관점과 경제학적 관점에 기초하여 설명하였다. 노인자살률의 경제적 요인에는 경제성장률과 실업률 그리고 노인의 경제활동참가율과 상대적 빈곤율(소득불평등율)을 포함하며, 사회적 요인의 범주에 속하는 변수로는 사회복지지출비, 이혼율, 그리고 고령화비 증가율과 노인부양비를 포함한다. 주요 연구결과로는 첫째, 노인의 경제활동참가율이 낮을수록 노인자살률이 높아지는 경향이 있었다. 둘째, 사회복지지출비가 낮을수록 노인자살률이 증가하는 것으로 나타났다. 셋째, 상대적 빈곤율, 고령화비 증가율, 그리고 노인부양비는 공히 이들이 증가할수록 노인자살률도 동시에 증가하는 것으로 나타났다. 끝으로 한국노인자살률의 지속적 증가를 예방하기 위해서 거시적 차원의 사회 경제적 정책방안을 제언하였다.

• 한국정보과학회논문지:소프트웨어및응용
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• 제33권10호
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• pp.836-850
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• 2006

오늘날 급속한 패키지 소프트웨어 제품의 증가 추세에 따라서, 소프트웨어 제품에 대한 품질 시험 요구 또한 증가하였다. 소프트웨어 제품 시험 시 중요한 요소는 무엇을 시험할지 기준이 되는 메트릭의 선정이다. 본 연구에서는 패키지 소프트웨어 종류를 특성 벡터들로 표현하여 메트릭들과의 연관 관계를 확률로서 세밀하게 표현한다. 특성 벡터란 소프트웨어의 형식 분류 지시자라고 할 수 있으며 특정한 패키지 소프트웨어가 다른 것들과 어떻게 구별되는지 나타낼 수 있다. 분류된 각각의 소프트웨어 형식별로 메트릭을 선정하기 위해서 과거 시험 데이타를 분석하여 활용한다. 베이지언망이 과거 데이타 분석에 이용되며 특성 벡터와 메트릭 간의 의존 관계 네트워크를 구축한다. 구축된 베이지언망은 새로운 패키지 소프트웨어 시험 작업에 적절한 메트릭을 찾아내는데 활용된다.

• 대한지리학회지
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• 제42권2호
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• pp.177-195
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• 2007

최근 빈곤에 대한 사회지리학적 연구는 빈곤문제를 완화하고 해결하려는 의지를 반영하여 사회복지서비스와의 연계적 측면에서 이루어진다. 빈곤계층의 기본적인 욕구를 충족시키기 위한 다양한 사회복지서비스의 제공에도 불구하고 서비스제공자와 서비스수혜자의 공간적 불일치로 인하여 발생하는 접근성의 문제는 결과적으로 사회복지서비스의 공간적 불평등으로 이어진다. 부산시를 대상으로 빈곤계층과 사회복지서비스의 연계성을 사회지리학적 입장에서 연구한 본 연구의 결론도 이와 같은 사회복지서비스의 공간적 한계에서 크게 벗어나지 못하고 있다. 1980년대 이후 급성장한 사회복지서비스의 양적 증대에도 불구하고 빈곤계층과 사회복지서비스시설간의 입지적 불일치는 상대적으로 복지서비스 공급에 있어서 과잉 및 과소지역을 초래하였다. 복지서비스의 과소공급지역을 중심으로 빈곤계층의 기본적인 욕구를 충족시키고 사회복지서비스의 공간적 불평등을 해결하기 위해서는 빈곤계층의 공간적 수요를 감안한 사회복지서비스시설의 유연적인 입지적 재분배가 요구된다.

• 대한기계학회:학술대회논문집
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• 대한기계학회 2007년도 춘계학술대회A
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• pp.502-505
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• 2007

PMMA has been extensively adopted in Nano Imprint Lithography(NIL). PMMA nano-structures experience severe mechanical load and deformation during NIL process, and understanding its mechanical behavior is very important in designing and optimizing NIL process. One of the most promising techniques for characterizing the mechanical behavior of nano structures is nano pillar compression test. In this study, the mechanical behaviors of PMMA pillars during compression test are analyzed using Molecular Dynamics. Two methods for simulation of PMMA nano pillars are proposed. The stress-strain relationship of nano-scale PMMA structure is obtained based on CVFF(Covalent Valence Force Fields) potential and the dependency of the applied strain rate on the stress-strain relationship is analyzed. The obtained stress-strain relationships can be useful in simulating nano-scale PMMA structures using Finite Element Method(FEM) and understanding the experimental results obtained by compression test of PMMA nano pillars.

• 동아시아경상학회지
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• 제4권2호
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• pp.28-46
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• 2016

The study aims to find out relationship between investor's psychology and financial decision making. A questionnaire containing ten questions for investor's psychology and eleven questions on financial decision making was administered. The questionnaires addressed demographic and cultural variables and resulted in three investor's psychology and three for financial decision making. The results show differences in psychology of investors of different age groups. Similarly difference in financial decision making was observed for different age groups. Also a linear dependency was observed between the psychology and decision making.

• 한국경영과학회지
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• 제40권3호
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• pp.73-95
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• 2015

Firms have reexamined and restructured their supply chain based on a long-term and partnership perspective as a firm's competitive advantage increasingly relies on its supply chain capability. A number of scholar works has provided evidence to support the positive effects of supply chain collaboration; however, the relationship between collaboration and performance is still inconclusive. This study refuses to have blinded faith on supply chain collaboration, but rather this paper suggests that the contribution of collaboration to supply chain performance improvement can be limited and vary along the contextual characteristics of a buyer-supplier relationship. Moreover, we argue that the relationship between supply chain collaboration and performance can be curvilinear. This paper provides and test hypotheses regarding the relationship between supply chain collaboration and performance. By using data of the Manufacturing Panel Survey (MPS), this study empirically validates the hypotheses. Overall, the results of the study support our hypotheses about a limited contribution of supply chain collaboration to manufacturing performance, which is opposite to a conventional expectation. Particularly, the effects of supply chain collaboration differ depending on the dimensions of performance such as customer satisfaction, quality, cost, delivery, and flexibility as well as the dependency in the buyer-supplier relationship. Moreover, the results of the study indicate that supply chain collaboration and performance may have curvilinear relationships in a certain context. Through a comprehensive model and empirical evidence, this study presents a better understanding of supply chain collaboration and provokes an open discussion about the effects of collaboration. This study also provides insightful implications for managers of buyers as well as suppliers who wish to foster stronger supply chain performance via a deep buyer-supplier relationship and collaboration.

• 보건행정학회지
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• 제6권2호
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• pp.149-189
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• 1996

The aims of this study were to find out present situation of self-medication, and to explicate the factors affecting self-medication propensity. To explicate empirically the factors affecting self-medication propensity, a model containing five groups of determining factors such as attitudinal, behavioral, knowled해, and need of health care factors, and demographic factors were developed. Data were collected from 647 residents in Pusan and Kyungnam using the self-administered questionnaire. The major reslts obtained were as follows: First, self-medication was 32% of all utilization of pharmacy. The drugs used for self-medication most commonly were analgesics(16.2%), followed by antacids and stomachics(14.2%), dermatologic preparations(13.1%), tonics and drinks (12.6%). Second, the sources from which people obtained drug information at self-medication were label of the container(50.8%), pharmacist(32.4%), self-decision or lay person(16.8%). The experience of side effect was 10.6% of all self-medication and how people cope with was withdrawal(59.0%), consultation by pharmacist or doctor(35.9%). Third, the results of ANOVA showed a statistically significant relationship between self-medication propensity and 3 demograpic factors, such as sex(p<0.10), age(p<0.10) and job(p<0.05). Forth, the results of multiple regression analysis showed a statistically significant positive relationship betwee self-medication propensity and satisfaction of previous self-medication, knowledge of drug, drug dependency, the frequency of doctor visiting, confidence in drug advertisement, tendency toward self-treatment of the family, and job. And it showed negative relationship between self-medication propensity and confidence in the medical profession, and health behavior. The model explained 29.5% of the variance in self-medication(p<0.001).

• 대한가정학회지
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• 제34권2호
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• pp.31-42
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• 1996

The purpose of this study was to examine the mother's perception on the concrete pattern of such behavior problems as noncompliance, jealousy, dependency, hyperactivity and stealing, by analyzing the difference between two cases of her own child and another mother's child relating to her attribution to the behavior problem of the child and the relationship between her attribution and behavioral reaction. This study was carried out by using 515 questionnaires answered by 1000 mothers of children of 7 kindergartens in Ulsan and Taegu, using Melissa Sweitzer's method (1986). The data was subjected to t-test, Pearson's correlation coefficient. T-test was applied to test the difference between two cases of her own child and another mother's child relating to her attribution to the behavior problem of the child and Person's correlation coefficient was estimated to test the relationship between her attribution and behavioral reaction. The result of this study is sumarized as follows : 1. It was shown that the mother's attribution to the behavior problem of the child is less serious when her child showed the behavior problem than when another child dose the problem while her attribution has an affective reaction to the behavior problem of the child. 2. The relationship between the mother's attribution and behavior reaction to the behavior problem of the child appeared variously in accordance with the attribution factor and behavior problem. Then the mother showed more attribution to stability while frequently ignoring the child.

• 한국항공운항학회지
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• 제31권1호
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• pp.118-132
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• 2023

This study aimed to analyze the relationship between the learning perception of aviation service subjects using role play on the interpersonal competence, learning satisfaction, and learning outcomes of college students majoring in aviation service. A survey was conducted targeting 217 university students majoring in aviation service who are enrolled in universities in the metropolitan area and Chungcheong area and have experience in class using role play. In addition, the hypothesis is verified using the structural equation model. Among the perceptions of role play classes experienced by university students majoring in aviation service, 'inter-dependency' was found to have a positive (+) effect on all sub-factors of interpersonal competence. And 'usefulness' confirmed the positive (+) influence relationship with 'temperament for others' and 'communication' except for 'relationship promotion' of interpersonal ability. Among sub-factor of interpersonal competence, it is confirmed that only the factors of 'temperament for others' and 'communication' had an effect on learning satisfaction. And it is proved that learning satisfaction is an important determinant of learning outcomes. Therefore, this study is expected to serve as a basis for deriving an efficient and optimal learning method for practical subjects in aviation service majors.