• 대한통합의학회지
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• 제11권1호
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• pp.71-78
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• 2023

Purpose : This study was purposed to analyze the effectiveness of PBL (Problem-Based Learning) classes and to derive class improvement plans. Methods : The subjects of the study were 48 students who took the 4th grade clinical dental hygiene course at S University located in Chungcheongnam-do of South Korea in 2021. A single-group pre and post experimental study was designed to verify whether there were significant changes in the research variables of students who participated in the class to which problem-based learning was applied. A paired-sample t-test was conducted for the collected data of 46 respondents. Results : As a result, the degree of improvement in problem clarification, cause analysis, and alternative development among the five sub-areas of problem-solving ability was statistically significant. This means that the problem-based learning class positively affects dental hygiene major students' ability to clarify problems, the ability to analyze causes to collect and analyze information, and the ability to develop alternatives to make decisions, thereby improving overall problem-solving abilities. However, the improved post-score was not statistically significant in the planning/execution and performance evaluation of the remaining two subdomains. In addition, post-scores of the leader aspect, opinion exchange, opinion evaluation, and opinion integration, which are sub-domains of collaborative self-efficacy, all showed great statistical significance. Problem-based learning improved the collaborative efficacy of dental hygiene major students overall by positively influencing the ability to lead a team, exchange and evaluate each other's views, and constructively integrate different views. Conclusion : It was found that both the subject's problem-solving ability and cooperation efficiency improved under the influence of problem-based learning. On the other hand, implications for improvement of the future class such as the necessity of supplementing strategies to promote planning and execution ability for problem solving, and ability to evaluate problem solving performance was suggested.

• 한국비블리아학회지
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• 제29권3호
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• pp.157-177
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• 2018

본 연구는 A 대학교 문과대학(인문, 교육계열) 재학생 457명을 대상으로 직업기초역량과 진로독서 실태를 분석하여 문제를 파악, 개선방안을 모색하기 위해 수행되었다. 분석결과, 첫째, 직업기초역량의 경우 의사소통능력(평균 3.61), 대인관계능력(3.59), 문해력(3.40), 문제해결능력(3.39)은 상대적으로 높았으나, 수리력(2.72), 사업가정신(2.89)은 낮았다. 둘째, 진로독서의 경우 65.2%가 하지 않는 것으로 나타났으며, 이유로는 '진로에 대한 책을 읽을 시간이 없어서' 46.3%, '진로와 관련해서 읽을 만한 책이 없어서' 25.8%, '진로에 대해서 궁금한 것이 없어서' 22.5% 순으로 나타났다. 이에 본 연구에서는 직업기초역량이 미흡한 학생이 상당수에 달하고 있는 점, 진로 자료 독서를 하고 있지 않는 학생이 65.2%에 달하는 점을 감안하여 직업기초역량을 체계화하여 강화할 것과 진로에 대한 이해력을 높이기 위한 체계화된 교육프로그램을 실행할 것을 제언하였다.

• 한국응용과학기술학회지
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• 제40권1호
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• pp.168-178
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• 2023

본 연구는 뷰티산업 현장 실무 전문가를 양성하기 위한 피부미용 이론 및 실기 수업을 통해 문제중심학습(PBL) 수업 개발 및 적용하고자 한다. 학습자들에게 피부미용 현장에서 일어나는 실제적인 문제를 제시하고, 그 문제를 해결하기 위해 학습자들 상호간에 공동으로 문제를 해결하는 방안을 강구하고자 한다. 학습자들에게 문제중심학습(PBL)을 적용한 피부미용 수업을 진행하고, 수강 후 그 효과에 대해 분석한다. 본 연구 결과로 현장 실제의 문제를 제시함으로써 학습자들이 실제 전문가들이 하는 일을 이해할 수 있었고, 주어진 문제에 대한 다양한 해결방법을 도출할 수 있다는 부분을 알게 되었다고 하여 문제해결 능력 신장을 기대 해 볼 수 있었다. 이와 같은 결과는 문제 탐구와 문제를 해결하기 위한 문제중심학습(PBL) 수업 과정은 학습자의 문제해결능력 향상에 긍정적으로 작용하고 있음을 시사하고 있다.

• 정보보호학회논문지
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• 제18권4호
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• pp.3-15
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• 2008

검색 가능 암호 시스템 (Searchable Encryption)은 암호화된 데이터에서 키워드를 검색하는 문제를 해결하기 위하여 2000년에 Song 등에 의해서 처음으로 제안되었다. 지금까지 대칭키 암호화 방식과 공개키 암호화 방식에 기반하는 여러 가지 검색 가능 암호 시스템이 제안되었으나, 공개키 암호화 방식에 기반한 기존의 기법들은 암호화 된 문서의 검색을 위해 서버에서 저장해야 하는 인덱스들의 크기가 키워드 개수에 비례하여 선형적으로 증가하는 단점을 가진다. 본 논문에서는 공개키 기반 검색 가능 암호 시스템에서 서버에서 저장하는 인덱스의 길이를 줄이기 위해 Bloom Filter를 적용하는 방법을 제안하고, Boneh 등이 제안한 PEKS(Public key Encryption with Keyword Search)에 제안한 방법을 적용하여, 메모리 측면에서 그 효율성을 분석한다.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 1993년도 한국자동제어학술회의논문집(국제학술편); Seoul National University, Seoul; 20-22 Oct. 1993
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• pp.100-104
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• 1993

In Part 1, we derived robust stability conditions for an LTI interconnected to time-varying nonlinear perturbations belonging to several classes of nonlinearities. These conditions were presented in terms of positive definite solutions to LMI. In this paper we address a problem of synthesizing feedback controllers for linear time-invariant systems under structured time-varying uncertainties, combined with a worst-case H$_{2}$ performance. This problem is introduced in [7, 8, 15, 35] in case of time-invariant uncertainties, where the necessary conditions involve highly coupled linear and nonlinear matrix equations. Such coupled equations are in general difficult to solve. A convex optimization approach will be employed in this synthesis problem in order to avoid solving highly coupled nonlinear matrix equations that commonly arises in multiobjective synthesis problem. Using LMI formulation, this convex optimization problem can in turn be cast as generalized eigenvalue minimization problem, where an attractive algorithm based on the method of centers has been recently introduced to find its solution [30, 361. In the present paper we will restrict our discussion to state feedback case with Popov multipliers. A more general case of output feedback and other types of multipliers will be addressed in a future paper.

• 대한간호학회지
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• 제39권2호
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• pp.207-216
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• 2009

Purpose: The purposes of this study was to analyze the effects of a health education program using problem-based learning on health related knowledge, behavior, and quality of life in elderly people. Methods: The participants included 44 elders, of whom 23 took the health education program and 21 did not. All participants were over 60 yr of age and were selected from residents of nursing homes or participants in activities of social welfare facilities in Jeju Province. Elders in both groups completed pre- and post-tests. Elders in the education group participated in 5 weekly sessions, 100-120 min/session of problem-based learning on health education. Data were analyzed using SPSS WIN 12.0. Results: Scores for health knowledge, health behavior, and quality of life for the education group were significantly higher than those of the control group. Conclusion: A problem-based learning health education program can be recommended as a method to promote the health of the elders. Indirectly, the results seem to indicate that proper assessment and support should be provided simultaneously in the management of elders' health. Finally, future study is needed to examine whether problem-based learning is more helpful compared to traditional education.

• Human Ecology Research
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• 제56권2호
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• pp.157-165
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• 2018

Using data from the Panel Study on Korean Children, this study investigated whether children with high levels of problem behaviors adjusted more poorly on the $1^{st}-grade$ than children with low levels of problem behaviors, and whether there was evidence of intra-individual stability in behavior problems over time. Data were analyzed by use of the Latent Growth Model and group differences analyses. Three findings were noteworthy. First, there was evidence of intra-individual and inter-individual variability in behavior problems between poor- and non-poor household children. Second, children with higher initial levels of internalizing and externalizing behaviors at 4 years had lower school readiness scores at 6 years. Finally, children with lower levels of school readiness at 6 years had lower school adjustment scores in $1^{st}$ grade. The results discuss implications for future research and policies for preschool children. With mediating effect of school readiness, developmental trajectories of child's problem behavior have been found to be predictors of delayed achievements in school. The results show that intervention programs are necessary for children with high levels of problem behavior. This study also showed that children who experienced poverty at home could have more difficulties in school readiness and school adjustment.

• 대한물리치료과학회지
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• 제9권3호
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• pp.179-186
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• 2002

This study addresses the need to adopt teaching-learning approaches in physical therapy education that develop links between theory and clinical practice in a meaningful way. Problem-based learning (PBL) is presented as a useful way to educate physical therapy for the future. The essential characteristics of problem-based learning include: curricular organization around problems rather than disciplines; an integrated curriculum rather than one separated into clinical and theoretical components; and an inherent emphasis on cognitive skills as well as on knowledge. PBL as implemented in the health sciences, is an educational method in which the focus of learning is a small-group tutorial in which students work through health care scenarios. The goals of the health care scenarios are to provide a context for learning, to activate prior knowledge, to motivate students, and to stimulate discussion. Learning is student-centered rather than faculty-centered, and self-directed learning is emphasized. Whereas the former focuses on critical thinking and clinical judgement, the latter's emphasis is on clinical competency. The physical therapist (PT) program at Cheju Halla college is a partial integrated problem-based curriculum. The history and process of PBL in general and in the PT program are reviewed. Long-term advocates of PBL stress that it is the only known method for preparing future professionals to be able to adapt to change, learning how to reason critically, enabling a holistic approach to health.

• 한국가정과교육학회지
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• 제3권1호
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• pp.131-146
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• 1991

The purpose of this study is to acquire basic materials to help the students Others of families in their homes through understanding them. This study was based on the questions asked to 100 students without parents in their homes and 100 students in standard homes. Percentage, T-test, counseling sample were used for statistical report. The following are the analysed results of this study. 1. Among the ten events, except for family life and economic problems, there were no distinguished contrasts between the students without parents in their homes and the students in standard homes. 2. The factors influencing stress are mainly plan for future, social environment, school life and learning and students without parents are especially affected by economic problem. 3. Comparing students without parents with one another in stress, the students without parents have economic problem and deficiency of affeetion, the students without father economic problem and their mothers health, the students without mother the difficulty of house affairs and emotional uneasiness of family. The students with step-mother have much misunderstasnding because of the lack of conversation among their family. The students with step-father hardly kconverse with their father and feel uneasy in family life. Based on all can be gailed these results, the following conclusion. 1) The students Other Types of families are stressed much more than the students in standard homes in family life and economic problems. 2) All Students are Stressed by bad environment, the plan of future, scholl and learning, 3) Comparing the Stubents without parents with one another, the students without parents have economics probem and deficiency of affeetion, the students without father economic problem and their mothers health, the students without mother house affairs and emotional uneasiness off family. The students of step-father and step-mother have the misuder standing by the lark of comversation, the deficiency of affection and the uneasiness off family life.

• 한국작물학회:학술대회논문집
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• 한국작물학회 1999년도 추계 학술대회지
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• pp.25-79
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• 1999

To evaluate the historical changes and future counterplan of food culture in Korea . the following were surveyed : the scale of foodseivice industry. the consumer attitude on functional health food. the fancy and using frequency of fastfood in the growing generation, the actual state on use of imported food. consumer opinions in selecting factor of functional and organic foods. the actual state and consumer attitude on the imported foods, long-term prospect of food service industry in futures. the production of food rubbishes and their reusing rates. the production scales and toxicity problems of agricultural medicines including the postharvest agricultural medicine. the consumer anxiety such as potential environmental and human health risks associated with GMOs (genetically modified organisms) and the import state of GMOs, long-term prospect of population increase in world, and aged population of over 65 years and their social index in Korea, self-supporting rate and national security of food in Korea. the prospect for demand and supply of grains in Korea and world. decrease of the farming population and the decrease problem of agricultural productivity. the problem on the introduction of direct payment system for a farmhouse, and other social problem etc. In cases of 1996, self-supporting rate of food in Korea was the lowest as $26.4{\%}$ in the world but those countries such as USA, UK France, Canada and Denmark were $134.0{\%}\;122.0{\%}$. $190.0{\%}$. $179.0{\%}\;and\;134.0{\%}$, respectively. in 1997 Therefore. our food security appeared as a very serious problem in a viewpoint of the national security That's why this very important Symposium will be held by agriculture-related three Societies to see the last year of 1999 out and the new millennium in.