• Maxillofacial Plastic and Reconstructive Surgery
• /
• 제37권
• /
• pp.18.1-18.7
• /
• 2015

Background: The aim of this study is to develop a rat model of bisphosphonates-related osteonecrosis of the jaw (BRONJ) that would be verified with clinical, radiological and histological examination, and to confirm the influence of concurrent bisphosphonates and steroids use upon the occurrence and aggravation of BRONJ. Methods: Twenty seven rats were divided into 3 groups; Saline group (I), Zoledronate group (II), Zoledronate and Dexamethasone group (III). Rats got weekly intraperitoneal injection for 4 times and extraction of left maxillary and mandibular 1st, 2nd molars were followed. Consecutive injections were performed, and blood sampling for measurements of C-terminal crosslinked telopeptide of type I collagen and tartrate-resistant acid phosphate 5b rats were performed at the time of 2, 4 and 8 weeks. And then, rats were sacrificed and evaluated clinically, radiologically and histologically. Results: 12/18 (66.6 %) of experimental group were diagnosed as BRONJ. There was no significant difference in incidence between zoledronate alone group (ll) and concurrent use of zoledronate and dexamethasone group (lll). Conclusions: Concurrent use of bisphosphonates and steroids increase incidence of BRONJ compared to saline group (l). Zoledronate alone group (ll) and concurrent use of zoledronate and dexamethasone group (lll) shows same incidence of BRONJ. Based on this study, the rat treated with bisphosphonates and steroids can be considered a novel, reliable and reproducible model to understand pathology of BRONJ.

• 기술사
• /
• 제25권4호
• /
• pp.52-58
• /
• 1992

In korea, since November 1982 these two small group activity (QC circle convension and Factory Saemaul activity small group convension) has been united, many problems have been disclosed that are aganist the basic principle more or less. Worker's small group within their working place to improve the surroundings creatively. In practice, however, many group are so typical and impetuous of the material effect that it is worried to be inclined to outform rather than contents. Effective small group activities are presumed to be successful only with labour management cooperation on the basis of human-orient management philosophy. The small group activities are also prevalent in service sector. More derivative methods have been developed and more members are willingly participation in training programs. The small group which is basically a horizontal organization unit, promptes communication within the whole organization, In consideration of social circumstances and traditions, the flexible model of the small group activities suitable to the corporate environment, will contribute to industrial development.

• 한국초등과학교육학회지:초등과학교육
• /
• 제30권4호
• /
• pp.615-623
• /
• 2011

The purpose of this study was to analyse of the effects on students' leaning types through the Creative Problem Solving Teaching Model in elementary science class. The results of this study were as follows; 1. experimental group in creative problem solving, scientific inquiry skills and academic achievement was higher than control group which was statistically significant (p<.05). 2. for the students' learning type the experimental group was distributed to accommodators (35.7%), divergers (25.0%), convergers (25.0%) and assimilators (14.3%). 3. after the program treatment, assimilator type group students in creative problem solving were higher than other type group students. 4. diverger and assimilator group students in academic achievement, diverger group students in scientific inquiry skills, and accommodator group students in scientific attitude were higher than other groups.

• Asia pacific journal of information systems
• /
• 제4권1호
• /
• pp.74-114
• /
• 1994

In spite of the importance of group decision making in corporations and recent active research efforts in group decision support systems in the US., few studies have been done in the area of group decision making in Korea. There is an urgent need to understand the behavior and peculiar characteristics of group decision making in Korea before we initiate any research in developing computer systems to help group decision making. This study proposes a model for group decision making based on the literature survey and empirical studies have been conducted using the model Although this study is exploratory in nature, tentative hypotheses are given for future research in group decision making.

• 한국정보통신학회:학술대회논문집
• /
• 한국해양정보통신학회 1999년도 추계종합학술대회
• /
• pp.380-383
• /
• 1999

본 논문은 인터넷 멀티캐스트 응용에서의 그룹 멤버쉽 관리를 위해 기본적으로 요구되는 프레임 워크를 제시한다 먼저, 현재 널리 사용되고 있는 멀티캐스트 응용들을 살펴보고, 이를 기반으로 멀티캐스트 그룹 관리를 위한 공통된 요구사항을 도출하였다 이것이 본 논문에서 제시하고자 하는 프레임 워크의 기본 기능이며, 여기에 속하는 기능 요소들은 그룹 생성(Croup Creation), 그룹 공지(Announce), 그룹 질의(Query), 그룹 등록(Enroll) 및 그룹 통지 (Notification)이다. 이를 통해 엄격한 멤버쉽 관리가 요구되는 멀티캐스트 응용 서비스를 지원하는 그룹 관리 프로토콜의 개발에 활용될 수 있을 것이다.

• 대한간호학회지
• /
• 제32권3호
• /
• pp.327-335
• /
• 2002

The main purpose of this study was to compare the clinical competency in different instructio nal methods for funda- mentals of nursing practicum, standardized patients methods story as text method ,and traditional lecture/model method. Method: The study was designed as a quasi-experimental, nonequivalent control group post-test design with three separate classes of sophomore students attending fundamentals of nursing classes at one baccaleureate nursing school located in metropoli tan Seoul area. Control group was taught by traditiona lecture/ model method and two experimental groups were taught by standardized patients method and story as text method. Data were collected from September, 1999 to June 2001. There were 36 students in the standardized patient method group, 38 students in story as text group, and 40 students in the control group. Data analysis was done using SPSS WINDOW 9.0. Result: The results showed that the standardized patients method and story as text method groups were significantly better in clinical judgement and communication skills than the traditional lecture/model method group. The standardized patients method group was significantly better in clinical nursing skills performance than two other groups. However, there was no significant difference among the three groups in student satisfaction. Conclusion: The standardized patients method is an effective in teaching clinical cometency for student nurses. It is necessary to explore more efficient way to develop standardized patients cases for wider areas of nursing education. Also, it is recommended to develop more research projects with many nursing programs.

• 한방안이비인후피부과학회지
• /
• 제14권1호
• /
• pp.182-189
• /
• 2001

This study was performed to compare the effect of Ojeoksan which have extracted by varied extractor(press extractor : PE, pressless extractor : PLE, short acting extractor : SE) on model of blood stasis in rats, Except for the normal group, hydrocortisone acetate(HA;25mg/kg in ethanol. IM) to induce experimental blood stasis model for 1 weeks and each extract of Ojeaksan was administrated after 1hr following HA injection for 1week. We measured the hematocrit, the platelet count, the prothrombin time, levels of fibrinogen in rats' blood, The sample Ⅰ(Ojeoksan extracted by PE) group showed significant decrease of hematocrit. prothrombin time and significant increase of the platelet count, levels of fibrinogen in comparison with those of the control group, The sample Ⅱ(Ojeaksan) extracted by PLE) group showed significant decrease of hematocrit and significant increase of levels of fibrinogen in comparison with those of the control group. Administration of the sample Ⅲ(Ojeaksan extracted by SE) group showed significant decrease of hematocrit and significant increase of the platelet count, levels of fibrinogen in comparison with those of the control group.

• 기본간호학회지
• /
• 제21권3호
• /
• pp.302-310
• /
• 2014

Purpose: The purpose of this study was to compare the effectiveness of training using an intravenous (IV) arm model versus a computer simulator for IV injections. Method: Study was a quasi-experimental study conducted with 106 nursing students. Participants were divided into two groups: the IV Arm Group using a mannequin arm model (control group) and the Computer Simulator Group using the Virtual IV demonstration (experimental group). Theoretical lectures and video presentations on IV injections were given to both groups. Each group went through the training practice using the IV arm or computer simulator. After the completion of training, questionnaires were given to the students to evaluate their learning attitudes and experiences, self-confidence in IV injection, and satisfaction with the training materials. Results: Student satisfaction with the training materials including the reality, usefulness, and educational effects showed notable differences between the two groups with the Computer Simulator group reporting more positive effects that the IV Arm group. However, there was no statistical difference between the two groups in the categories of learning attitude, learning experience, or self-confidence. Conclusion: While there was a differences in strengths and weaknesses of the two methods, both methods should be considered for practice and further study needs to be done on educational effectiveness.

• 한국과학교육학회지
• /
• 제12권1호
• /
• pp.35-46
• /
• 1992

The purpose of this study was to investigate the most effective teaching model in the study of boiling point elevation. The teaching models were classified into three group-deductive, inductive and analogical teaching models. Learning materials, based on three teaching models respectively, were applied to 11th grade students, and the effect of teaching models were investigated and analyzed. The average achievement score(4.24) of the group treated with the analogical teaching model was higher than those(3.06 respectively) of each group treated with inductive or deductive teaching model(p<0.001). Most students answered that the analogical teaching model was helpful and interesting one for the comprehension of scientific concept.

• Macromolecular Research
• /
• 제16권4호
• /
• pp.320-328
• /
• 2008

We established a thermodynamic framework of group contribution method based on modified double lattice (MDL) model. The proposed model included the long-range interaction contribution caused by the Coulomb electrostatic forces, the middle-range interaction contribution from the indirect effects of the charge interactions and the short-range interaction from modified double lattice model. The group contribution method explained the combinatorial energy contribution responsible for the revised Flory-Huggins entropy of mixing, the van der Waals energy contribution from dispersion, the polar force, and the specific energy contribution from hydrogen bonding. We showed the solvent activities of various polymer solution systems in comparison with theoretical predictions based on experimental data. The proposed model gave a very good agreement with the experimental data.