• The Journal of Advanced Prosthodontics
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• 제6권1호
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• pp.1-7
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• 2014

PURPOSE. The accuracy of a gypsum model (GM), which was taken using a conventional silicone impression technique, was compared with that of a polyurethane model (PM), which was taken using an iTero$^{TM}$ digital impression system. MATERIALS AND METHODS. The maxillary first molar artificial tooth was selected as the reference tooth. The GMs were fabricated through a silicone impression of a reference tooth, and PMs were fabricated by a digital impression (n=9, in each group). The reference tooth and experimental models were scanned using a 3 shape convince$^{TM}$ scan system. Each GM and PM image was superimposed on the registered reference model (RM) and 2D images were obtained. The discrepancies of the points registered on the superimposed images were measured and defined as GM-RM group and PM-RM group. Statistical analysis was performed using a Student's T-test (${\alpha}=0.05$). RESULTS. A comparison of the absolute value of the discrepancy revealed a significant difference between the two groups only at the occlusal surface. The GM group showed a smaller mean discrepancy than the PM group. Significant differences in the GM-RM group and PM-RM group were observed in the margins (point a and f), mesial mid-axial wall (point b) and occlusal surfaces (point c and d). CONCLUSION. Under the conditions examined, the digitally fabricated polyurethane model showed a tendency for a reduced size in the margin than the reference tooth. The conventional gypsum model showed a smaller discrepancy on the occlusal surface than the polyurethane model.

• Journal of Chest Surgery
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• 제27권9호
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• pp.723-731
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• 1994

We have modified the isolated perfused working rabbit lung model [IPWL] by perfusing the isolated lung with a hollow fiber membrane deoxygenator.For assessment the stored lung was ventilated with FIO2 0.4 and perfused with 37$^{\circ}$C deoxygenated circulating blood at a rate 5ml/kg/min for several hours until lung failure.We chose to compare our developing solution which contained low potassium and pentastarch with the modified Euro-Collins solution .Experiments were divided into four groups[n=6] based on the type of flushing preservation solution and preservation time.The flushed lungs were then preserved into same solution at 8~10$^{\circ}$C with 100% O2 inflated condition for 1 or 20 hours.These following results were obtained.The IPWL model requires only one animal per experiment and allows for the continuous assessment of aerodynamic performance. This should therefore be used as screening test in lung preservation.One hour preservation groups, there were no significant difference in recovery rates of PaO2, PAP and Paw. Survival time in the one hour preservation groups were very significant long in the Group II[LPPS, p<0.01]. Twenty hours preservation groups, there were no significant difference in the recovery rates of PAP and Paw between Group III[m-ECS] and Group IV[NS], but PaO2 was significantly worse at onset of reperfusion in Group III when compared with Group IV [p<0.05]. And also survival time in the 20 hours preservation groups were significant long in the Group IV [p<0.05].

• 한국도서관정보학회지
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• 제40권2호
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• pp.491-514
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• 2009

최근 문화서비스에 대한 수요 확대와 지역 문화 활성화를 위해 공공도서관을 확충할 계획이다. 하지만 대규모 투자비의 비가역성과 한정된 자원의 효율적 배분과 활용을 위해 현재 운영 중인 도서관에 대한 체계적이고 과학적인 효율성 분석이 선행되어야 한다. 따라서 본 연구는 Clustering DEA/AHP모형을 활용하여 전국 공공도서관 565곳의 상대적 효율성을 분석하였다. 분석 결과, 전국 공공도서관은 세 그룹으로 분류되었으며, 대형 도서관이 속한 Group 1의 평균 효율성은 0.89, 중형도서관이 속한 Group 2의 평균 효율성은 0.72, 소형도서관이 속한 Group 3의 평균 효율성은 0.60으로 평가되었다.

• International Journal of Advanced Culture Technology
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• 제7권3호
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• pp.25-34
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• 2019

Purpose: The purpose of this study was to examine the effects of health promotion program, which was based on the Health Belief Model, on the health belief, health promoting behavior and quality of life for middle-aged women. Methods: The study focused nonequivalent control group pretest-posttest design. Data were collected among 40 middle-aged women (20 were experimental group and 20 were control group) on 1st November 2014 and 25th April 2015. The experimental group received 12 sessions of health promotion program for aging preparation once a week for 12 weeks. Data were analyzed by ${\chi}^2$ and t-test and paired t-test using the PASW 21.0 program. Results: The study results shown that, health belief (t=-2.94, p=.006), health promoting behavior (t=-4.76, p<.001) and higher quality of life (t=-7.65, p<.001) scores of experimental group were higher than the control group. Conclusion: The health promotion program based on the Health Belief Model was effective and increased the health belief and health promoting behavior and quality of life among middle-aged women. It seems health promotion program is necessary to improve middle age women's health and quality of later life.

• 한국발생생물학회지:발생과생식
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• 제25권2호
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• pp.83-91
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• 2021

The present study was performed to investigate the effect of maternal hypothyroidism and puberty onset in female rat pups. To do this, we employed propylthiouracil (PTU) to prepare a hypothyroid rat model. Pregnant rats were treated with PTU (0.025%) in drinking water from gestational day 14 to postnatal day 21 of offspring. Comparison of general indices such as body and tissue weights and puberty indices such as vaginal opening (VO) and tissue histology between control and PTU-treated rats were conducted. There was no significant difference in the date of VO between control and PTU group. The body weights of the PTU group were significantly lower, only 36.8% of the control group (p<0.001). Although the absolute thyroid weight was not changed by PTU treatment, the relative weight increased significantly about 2.8 times (p<0.001), indicating that hypothyroidism was successfully induced. On the other hand, the absolute weights of the ovary and uterus were markedly decreased by PTU administration (p<0.001), and the relative weight was not significantly changed. The ovarian histology of PTU group revealed the advanced state of differentiation (i.e., presence of corpora lutea). Inversely, the uterine histology of PTU group showed underdeveloped structures compared those in control group. Taken together, the present study demonstrates that our maternal hypothyroidism model resulted in minimal effect on pubertal development symbolized by VO despite of huge retardation in somatic growth. More sophisticatedly designed hypothyroidism model will be helpful to achieve a better understanding of pubertal development and related disorders.

• 한국과학교육학회지
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• 제37권1호
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• pp.25-37
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• 2017

이 연구의 목적은 초등학교 6학년 1학기 4. 여러 가지 기체 단원에서 입자 개념을 학습할 때 효과적인 방안을 제시하여 현장의 교사와 학생들에게 도움을 주고자 하는 것이다. 연구자는 입자 개념을 도입하는 효과적인 방법으로 귀추적 추론법에 주목하였다. 실험집단(N=26)은 귀추적 추론 모형(Kim, 2003)을 바탕으로 재구성된 총 열두 차시 수업을 실시하였으며 비교집단((N=26)은 일반적인 교과서의 순서와 내용대로 수업을 실시하였다. 입자 개념을 살펴보기 위하여 기체 개념 이해도 검사를, 입자라는 추상적 실체를 다루는 단원이므로 인지 수준을 알기 위하여 GALT 검사를 실시하였다. 연구 결과 첫째, 처치 후 두 집단의 효과 차이를 알아본 독립표본 t 검정에서 21점 만점에 비교집단의 기체 개념 이해도 평균은 10.76, 처치집단의 기체 개념 이해도 평균은 14.65이며 t 통계값 2.890, 유의확률은 0.006으로 유의수준 .05에서 유의한 차이가 있는 것으로 나타났다. 또한 기체 개념 이해도 검사지에 입자로 표현한 횟수를 살펴보았는데 일반 집단 53회, 실험집단 114회로 두 배 이상 차이가 나타났다. 둘째, 학생들의 인지 수준과 처치 유무의 상호작용 효과에 대한 이원분산 교차설계 검증을 하였는데 상호작용 효과는 없었고, 실험집단이 인지 수준에 관계없이 비교집단보다 점수가 모두 높게 나타났다. 연구 결과를 통하여 귀추적 추론 모형을 적용하여 입자 개념을 다룬 수업의 효과를 확인할 수 있었다.

• 한국간호교육학회지
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• 제24권1호
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• pp.100-109
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• 2018

Purpose: This study evaluated the effect of a teaching model to improve cultural competency (TMCC) for Korean undergraduate nursing students. Methods: A nonequivalent control group pretest/posttest quasi-experimental study was conducted with a convenience sample of 168 undergraduate nursing students in South Korea. The experimental group of 121 seniors was taught a 13-week teaching model in order to improve cultural competence. A control group with 47 junior students underwent nursing major courses, but did not take this teaching model. Before and after the program, students' level of cultural competency was measured using the Questionnaire for Cultural Competence (QCC) consisting of three sub-scales: "awareness and desire," "encounter," and "nursing skill and knowledge." Results: After the experiment, the experimental group showed significantly higher improvement in the Questionnaire for Cultural Competence in the three sub-scales of "awareness and desire," "encounter," and "nursing skill and knowledge" than the control group (p=<.050). Conclusion: A teaching model to improve cultural competence was effective in improving Korean undergraduate nursing students' cultural competency. Further studies need to be repeated in order to identify the effectiveness of the teaching model to improve cultural competency with graduate or clinical nurses.

• 대한한방내과학회지
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• 제36권4호
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• pp.547-561
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• 2015

Objectives In this study, we divided Korean asthma patients into excess syndrome or deficiency syndrome groups according to clinical phenotype. Genetic analysis was conducted to investigate the association of exonic SNPs in the CD46 gene polymorphism with the clinical phenotype based on the differentiation syndrome of the bronchial asthma patients.Methods There were 95 healthy patients (control group) and 53 asthma patients. (The deficiency syndrome group included 24 and the excess syndrome group 29). We searched the exonic areas of the CD46 gene in the NCBI website SNPs with <0.01 minor allele frequency (MAF) and <0.01 heterozygosity. We finally selected two SNPs: rs138843816, Ser13Phe and rs7144, 3’-UTR. Hardy-Weinberg equilibrium was calculated using SNPStats.Results There were significant differences in the codominant 1 model and the dominant model between the healthy group and the asthma group. There were significant differences between deficiency syndrome group and the excess syndrome group in the genotype frequencies and in the codominant 1 model, the dominant model, and the log-additive model. The allele frequency of rs7144C showed a significant difference between the deficiency syndrome group and the excess syndrome group. Two-SNP haplotype analysis showed a significant difference in frequency in the deficiency syndrome group and in the excess syndrome group. There were significant differences between the healthy group and the excess syndrome group in the codominant 1 model, the dominant model, and the log-additive model. The frequency of the rs7144 C allele exhibited a significant difference in the demonstration. SNP haplotype analysis between the healthy group and the excess syndrome group showed a significant difference in the frequency of the CT haplotype and the CC haplotype.Conclusions The results indicate that two CD46 SNPs (rs138843816, Ser13Phe and rs7144, 3′–UTR) might be associated with the symptomatic excess syndrome in Korean asthma patients.

• 대한간호학회지
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• 제31권5호
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• pp.818-834
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• 2001

This study aims at confirming exercise effects on obesity, mobility, self-efficacy, process of change, and decisional component by stage based exercise motivational intervention program for the elderly. The stage based exercise intervention program was constructed based on Transtheoretical Model. Methods: The design of this study is nonequivalent control group with repeated measuring by quasi-experimental study. The subjects of this study, composing of experimental group of 32 and control group of 28 were selected at one institution for the aged in Seoul. Results: 1) The body fat (weight, BMI and circumference of waist), of the intervention group was significantly decreased than the control group. 2) The mobility of the intervention group was not significantly increased than control group. 3) The self-efficacy, Pros, Process of Change for exercise of the intervention group was not significantly increased than the control group. 4) The Cons for exercise of intervention group was not significantly decreased than the control group. Conclusion: The above result have informed us that a stage-based exercise motivational intervention program for the elderly has the effect of decreasing old persons' body fat and has value as an effective means of nursing for the elderly.

• Asia pacific journal of information systems
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• 제9권3호
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• pp.1-23
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• 1999

The objective of this study is to examine the media richness theory and the social information processing model by analyzing the effect of media experience on media perception and communication process. To accomplish this objective, a laboratory experiment was conducted. The independent variable was text medium experience and a face-to-face medium was added as a control group. The dependent variables were medium perception and communication process. Medium perception includes perceived richness, medium feeling, task satisfaction, and communication satisfaction. Communication processes were also analyzed to compare each treatment group. The results can be summarized into two facts. First, face-to-face group showed higher perceived richness than text medium group. And experienced text medium group perceived their text medium richer than inexperienced text medium group. Second, experienced text medium groups showed more interactions between subjects than inexperienced text medium group. Experienced text medium group also showed more agreements and meta-communication which could be found in face-to-face group. The result of this study supported media richness theory by finding that face-to-face medium was perceived richer than text medium, And the results also proved social information processing model by comparing experienced text medium group and inexperienced text medium group. The text medium, although thought to be the leanest one, could be perceived richer if users had lots of experience on it.