• 한국멀티미디어학회논문지
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• 제23권12호
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• pp.1576-1585
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• 2020

The purpose of this study is to design and apply YouTube ecosystem using digital curation to improve the interaction of untact class. The untact digital instructional model for building the YouTube ecosystem is composed of four modules: domain, tutor, student, and interface, and the role of each module is described. As an application example, the team project "Development and Operation of Instructional Assistant YouTube" is performed in the Introduction to Media Software class. The learning experience is described in terms of professor, peer tutors, and learners, and learning outcomes are presented through surveys.

• 한국인터넷방송통신학회논문지
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• 제10권6호
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• pp.125-130
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• 2010

협동학습이란 서로 다른 능력을 갖는 학생들이 주어진 주제에 대한 이해를 증진하기 위하여 다양한 학습 방법을 사용하여 단지 무엇을 배울 것인지 뿐 아니라 팀 구성원들의 학습을 도움으로서 보다 높은 성취도를 갖게 하는 학습방법이다. 본 논문에서는 협동학습 교육프로그램 활용을 위한 효율적인 팀 구성 방법에 대해서 기술한다. 이를 위해 초등학교 학생들을 위한 영어와, 수학 협동학습 프로그램을 구현하였다. 이 협동학습 교육프로그램을 활용하여 학습자들은 협동학습을 수행하였으며 성적, 성별, 친밀도 별 실험을 실시하였다. 결과로 혼성이며 성적이 상호보완적인 팀이 가장 효율적임을 알 수 있었다.

• 보건행정학회지
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• 제20권1호
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• pp.137-154
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• 2010

This study empirically analyzed the effects of the Top Management Team (TMT) on organizational performance. We verified whether the age heterogeneity, job heterogeneity (core career, core function and major), and process (communication and integration) of the TMT affect organizational performance (management performance and healthcare service quality evaluation level). We collected data about 473 members of the 2006 TMT in 81 medical institutions. We also utilized statistics of organizational performance from the Ministry for Health, Welfare and Family Affairs and the Korean Institute of Hospital Management. Results of the study showed that the age heterogeneity of TMT exerted a negative effect on the healthcare service quality evaluation level, while the process exerted a positive effect. However, the age heterogeneity, job heterogeneity, and process had no influence on management performance. We discussed the implications of such outcome of the investigation in comparison with the former studies on TMT and organizational performance, and presented its restrictions and future plans.

• 한국응용과학기술학회지
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• 제23권4호
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• pp.290-299
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• 2006

This article investigated to polymer-clay nanocomposite, especially in interfacial respect clay structure, its dispersion into polymer matrix, and clay modification is studied. The cationic exchange of surfactants with clay gallery results in preparing organo-clay capable of compatiblizing to monomer or polymer and increasing interlayer adhesion energy due to expansion of interlayer spacing. The orientation of surfactant in clay gallery is affected by chemical structure and charge density of clay, and interlayer spacing and volume is increased with alkyl chain length of surfactant, or charge density of clay. Also, the interaction between clay and polymer in preparing polymer-clay nanocomposite is explained thermodynamically. In the future, the study and development of polymer-clay nanocomposite is paid attention to the interfacial adhesion, clay dispersion within polymer, mechanism of clay intercalation or exfoliation.

• 보건교육건강증진학회지
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• 제21권3호
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• pp.151-177
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• 2004

Recently, the educational community has attempted to implement the theory of multiple intelligences. In approaching multiple intelligences, teachers have applied the same structural approach which has been so successful with cooperative learning. Cooperative learning is easy to learn and implement, fun for teachers and students, and produce profoundly positive outcomes along a remarkable number of dimensions. Different structures are designed for different outcomes, including enhanced mastery of subject matter, improved thinking skills, team building, class building, development of social character and social skills, communication skills, classroom management, classroom discipline, and development of and engagement of each of the multiple intelligences. Cooperative learning is becoming an increasingly popular teaching strategy. In this study, it is aimed to clarify the application of cooperative learning in health education. Cooperative Learning in health education enhances student learning by: 1) providing a shared cognitive set of information between students, 2) motivating students to learn the material, 3) ensuring that students construct their own health knowledge, 4) providing formative feedback, 5) developing social and health group skills necessary for success outside the classroom, and 6) promoting positive interaction between members of different cultural and socio-economic groups. Cooperative Learning structures and techniques in health education are following. Flash Card, Focused Listing, Structured Problem-solving, Paired Annotations, Structured Learning Team Group Roles, Send-A-Problem, Value Line, Uncommon Commonalities, Team Expectations, Double Entry Journal, Guided Reciprocal Peer Questioning, What if. Because the purpose of health education is the practice, therefore health specialists have to guide powerful and effective teaching method The application of cooperative learning in health education may improve its effectiveness.

• 통합자연과학논문집
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• 제1권1호
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• pp.24-31
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• 2008

Brassinosteroids (BRs) are a special class of plant steroid hormones that are essential for normal growth and development. Part of confusion is whether BRs are unique to plants, because they have overlapping physiological roles with other better-studied hormones and with physiological responses caused by light. In systems designed to assay for cytokinins, the effects of BRs vary. We measured hypocotyl length for testing the ability of brassinolide (BL) to rescue double mutant between det2 and the photoreceptor null mutant phytochrome B (phyB). PHYB involved in controlling hypocotyl elongation in increased concentration of BL whereas phyBdet2 double mutant just partially rescue to phyB in white and red light indicated the involvement of BRs in PHYB regulated cell elongation. BRs regulated hypocotyl growth was delayed by BAP, a cytokinin treatment but inhibitory effects of BAPs on hypocotyl growth was slightly recovered by BL. The result indicated that the mode of action of BR and cytokinin is independent or sequential in the downstream light-regulated response control on hypocotyl elongation and also light modulated the action of BR and cytokinin in some extent.

• 한방안이비인후피부과학회지
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• 제23권1호
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• pp.270-281
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• 2010

Objectives : The purpose of this study is to survey the needs of Oriental Medical students about the existing teaching methods and to investigate satisfaction of new teaching & learning method on the Oriental medical Ophthalmology & Otolaryngology Class. Methods : 1. The needs of Oriental medicine whole students(475 persons) were surveyed with questioning paper. 2. Oriental medical Ophthalmology & Otolaryngology were studied by new paradigm teaching method with 116 students(3rd grade, school of Oriental medicine). 3. The satisfaction of school lesson of Oriental medicine 3rd grade students(106 persons) were surveyed with questioning paper before & after applying new paradigm teaching method. Results : 1. 43% students did not know well the purpose of lessons. 2. 46.7% students answered the curriculum has a large quantity. Conclusions : 1. Students want to study with various teaching & learning methods on school lessons. 2. 72.6% students were replied the problem based learning is effective to make a diagnosis and treatment of patients in the future. 3. 58.5% students take a part positively in the conduct of Team based learning study. 4. Team based learning was effective to the interaction with professor and students.

• Environmental Analysis Health and Toxicology
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• 제31권
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• pp.16.1-16.9
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• 2016

Objectives Banha-sasim-tang (BST), which consists of seven different herbs, is one of the most popular herbal formulae for treating gastrointestinal disorders in Eastern Asia. The commonly used herbal medicine is often co-administered with other therapeutic drugs, which raises the possibility of herb-drug interactions and may modify the clinical safety profile of therapeutic drugs. Methods We investigated the potential herb-drug interactions between BST extract and midazolam (MDZ) in mice. The area under the plasma concentration-time curve (AUC) of MDZ and 1'-hydroxymidazolam (1'-OH-MDZ) was evaluated for both oral and intraperitoneal administration of MDZ, following oral administration of BST (0.5 and 1 g/kg). Results It was found that the AUC of MDZ and 1'-OH-MDZ was lower in case of oral administration of MDZ. Administration of BST extract was not associated with hepatic cytochrome P450 activity. BST extract induced a strong reduction in pH and it has been reported that oral mucosal absorption of MDZ is lower at low pH. The decreased absorption rate of MDZ might be caused by the ingredients of BST and may not be related to other factors such as increased excretion of MDZ by P-glycoprotein. Conclusions The altered pharmacokinetics of midazolam caused by co-administration with BST in vivo could be attributed to a decrease in pH and subsequent reduction of MDZ absorption rate.

• 한국해양공학회지
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• 제19권5호
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• pp.1-15
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• 2005

The motion behaviors including hydrodynamic interaction and mechanical coupling effects on multiple-body floating platforms are simulated by using a time domain hull/mooring/riser coupled dynamics analysis program. The objective of this study is to evaluate off-diagonal hydrodynamic interaction effects and mechanical coupling effects on tandem moored FPSO and shuttle taker motions. In the multiple-body floating platforms interaction, hydrodynamic coupling effects with waves and mechanical coupling effects through the connectors should be considered. Thus, in this study, the multiple-body platform motions are calculated by Combined Matrix Method (CMM) as well as Separated Matrix Method (SMM). The advantage of the combined matrix method is that it can include all the 6Nx6N full hydrodynamic and mechanical interaction effects among N bodies. Whereas, due to the larger matrix size, the calculation time of Combined Matrix Method (CMM) is longer than the Separated Matrix Method (SMM). On the other hand, Separated Matrix Method (SMM) cannot include the off-diagonal 6x6 hydrodynamic interaction coefficients although it can fully include mechanical interactions among N bodies. To evaluate hydrodynamic interaction and mechanical coupling effects, tandem moored FPSO and shuttle tanker is simulated by Combined Matrix Method (CMM) and Separated Matrix Method (SMM). The calculation results give a good agreement between Combined Matrix Method (CMM) and Separated Matrix Method (SMM). The results show that the Separated Matrix Method (SMM) is more efficient for tandem moored FPSO and shuttle tanker. In the numerical calculation, the hydrodynamic coefficients are calculated from a 3D diffraction/radiation panel program WAMIT, and wind and current forces are generated by using the respective coefficients given in the OCIMF data sheet.

• Elastomers and Composites
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• 제48권3호
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• pp.225-231
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• 2013

본 연구에서는 carboxylated SBR latex와 zinc oxide가 SBS 복합재의 내마모성과 debris 특성 개선에 미치는 영향을 관찰하였다. 실리카를 첨가한 SBS 복합재는 실리카 입자간의 수소 결합에 의한 강한 filler-filler interaction으로 인한 낮은 분산성 때문에 기계적 강도, NBS 내마모성, debris 특성이 전체적으로 감소하는 것으로 나타났다. carboxylated SBR latex를 첨가한 SBS 복합재는 carboxyl group과 실리카의 silanol group간의 결합을 통하여 filler-filler interaction이 감소하고 실리카의 분산성이 증가하기 때문에 기계적 강도, NBS 내마모성, debris 특성이 향상되는 것을 확인 하였다. carboxylated SBR latex와 zinc oxide를 동시에 첨가한 경우, carboxyl group에 의한 실리카의 분산성 향상과 더불어 zinc ion과 carboxyl group간의 ion cluster 형성을 통하여 물성이 크게 증가하였다. Zinc ion과 carboxyl group간의 ion cluster 형성은 $1550{\sim}1650cm^{-1}$의 zinc carboxylate group stretch 피크의 FT-IR 분석 결과로 확인하였다. carboxylated SBR latex와 zinc oxide를 첨가한(SC-4) 복합재의 경우, 인장강도 $156kgf/cm^2$, 신장율 936%, 인열강도 59.4kgf/cm의 우수한 기계적 강도를 나타내었으며, NBS 내마모성은 338%로 가장 우수한 특성을 나타내었다. 또한, 표면 마찰 시에 debris 발생 역시 크게 감소하며, 표면 마찰 저항의 증가로 파도 형태의 마모 특성을 나타내었다.