• Tuberculosis and Respiratory Diseases
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• v.76 no.4
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• pp.179-183
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• 2014

Immunoglobulin (Ig) G4-related disease is a recently recognized systemic fibroinflammatory condition characterized by a lymphoplasmacytic infiltrate rich in IgG4-positive plasma cells with elevated circulating levels of IgG4. The disease can either be localized to one or two organs, or present as diffuse multi-organ disease. Furthermore, lesions in different organs can present simultaneously or metachronously. In the pulmonary manefestations, lesions associated with IgG4-related disease have been described in the lung parenchyma, airways and pleura, as well as the mediastinum. We report a case of IgG4-related disease presenting as massive pleural effusion and thrombophlebitis.

• Tuberculosis and Respiratory Diseases
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• v.55 no.3
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• pp.303-310
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• 2003

Background : Lymphangioma of the mediastinum is an uncommon benign tumor of lymphatic origin that is most often seen in children, is very rare in adults and is frequently discovered incidentally on chest x-ray exams. While radiology (CT and MRI) may suggest the diagnosis and allow an assessment of the operative difficulties, the histology of the surgical specimen is required for precise diagnosis. Complete resection is the only treatment; however, in some patients resection was incomplete because of the infiltrating character of these tumors, leading to recurrence. We report three cases of mediastinal lymphangioma with a review of the literature.

• Journal of Korean Academy of Nursing
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• v.39 no.6
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• pp.840-850
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• 2009

Purpose: This study was done to investigate the relationship between critical thinking disposition and clinical competence among nurses in general hospitals. Methods: This study was a descriptive-correlational study with a convenience sample of 560 nurses from 5 general hospitals. The data were collected by self-administered questionnaires. Critical thinking disposition was measured using the Critical Thinking Disposition Scale for Nursing Students. Clinical competence was measured using the Standardized Nurse Performance Appraisal Tool. Results: The mean score for critical thinking disposition and clinical competence was 3.37 and 4.10 respectively on a 5 point scale. A statistically significant correlation was found between critical thinking disposition and clinical competence. A regression model explained 72.8% of clinical competence. Prudence is the most significant predictor of clinical competence ($R^2=.728$). Conclusion: Study findings suggest that nurses with a higher level of critical thinking disposition would have a higher level of clinical competence. Furthermore, prudence might be the most important predictor of clinical competence. In order to strengthen clinical competence in nurses, the development and enhancement of critical thinking should be emphasized at the college level and nurses should be encouraged to make a clinical decision with greater prudence.

• Journal of Korean Academy of Nursing
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• v.35 no.2
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• pp.382-389
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• 2005

Purpose: This longitudinal study was done to investigate critical thinking dispositions and critical thinking skills of nursing students enrolled in a 4-year baccalaureate program at a university in Korea. Method: The study used a longitudinal design. A convenience sample of 32 nursing students who were completing their 1st, 2nd, 3rd, and 4th year in a baccalaureate program at a selected university was included. The subjects completed the California Critical Thinking Dispositions Inventory (CCTDI), the California Critical Thinking Skill Test (CCTST), and a demographic questionnaire. Data was analyzed by descriptive statistics, repeated ANOVA, adjusted p-values, and Pearson's correlation coefficient with SAS 8.12. Results: There was statistically significant improvement according to academic year in the CCTDI total mean score (F=7.54, p= .0001) and subscales of Open-mindedness, Self-confidence, and Maturity. Contrarily, no statistically significant difference was found in the CCTST total mean score and subscales' score except Analysis. Conclusion: There is no significant correlation between critical thinking dispositions and skills, so it will be necessary to repeat a study like this, and the translated instruments should be modified by considering Korean culture.

• Geomechanics and Engineering
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• v.16 no.4
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• pp.415-421
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• 2018

A location determining method is proposed for critical sliding surface in the stability analysis of the filling materials in karst caves. First, a preliminary location of the sliding surface is determined based on simulation results which includes displacement contour and plastic zone. The sliding surface will locate on the bottom contact interface when the friction angle is relative small. However, a weakened contact interface always becomes the critical sliding surface no matter what the friction angle is. Then when the friction angle becomes larger, the critical sliding surface inside fillings can be determined by a parabola, the coefficient of which increases linearly with the friction angle under the same cohesion. Finally, the critical sliding surface approximately remains unchanged with friction angle. The influence of cohesion is similar to that of friction angle. Although affected by shape, size or position of the karst cave, the critical sliding surface mainly depends on both friction angle and cohesion. Thus, this method is always useful in determining the critical sliding surface.

• Journal of The Korean Society of Agricultural Engineers
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• v.51 no.5
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• pp.69-78
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• 2009

In order to improve water quality of upper watershed of Paldang reservoir, it is necessary to evaluate non-point source pollution loads and identify critical watershed pollution sources. A GIS based Soil and Water Assessment Tool was applied to evaluate model application and reliability, estimate NPS pollution load, identify critical watershed by NPS pollution sources, and suggest various best management practices for Kyongan Stream watershed. Yearly NPS pollution loads were estimated 30.0% SS, 60.1% TN and 35.4% TP, respectably. The watershed pollution load is mainly decided by precipitation condition and SS and nutrients load have a significant regression relationship. Based on 10-year average yearly NPS pollution load, critical sub-watersheds were identified. The No. 5 and 17 which have lots of relatively intensive agricultural fields and scattered industrial area were vary critical sub-watersheds and under more intensive pollution load. In order to control critical watershed, watershed best management practices such as scientific fertilizer, contour farming and parallel terrace, transferring the sloppy farmland to grass or forest and constructing a buffer zone, and constructing wetlands and retention ponds will be applied. Overall the SWAT model can be efficiently used for identification of critical sub-watersheds in order to develop a priority watershed management plan to reduce water pollutions.

• Journal of The Korean Association For Science Education
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• v.17 no.2
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• pp.163-178
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• 1997

The purpose of this study is to investigate the effect of categorizing activities in lessons on improving critical thinking to meet energy environment issues in every day situation, supposing that there are not only scientific concepts but also critical thinking ability in scientific literacy to meet social controversies related with science intelligently. Categorizing Activity Program was developed and applied to the 10th grades(n=51) in Seoul for about one month. The program was consisted of two domains. They studied science concepts of various aspects of science, technology and society related with energy and environment in the first and second domain repectively, in the while, two critical tasks which include articles from newspapers and magazines were assigned to them for the development and evaluation of critical thinking abilities. The scores of critical thinking ability, the cognitive element, and critical thinking inclination, the affective element, were increased meaningfully(p<.05). In conclusion, categorizing activity as a strategy of concept attainment was effective in improving critical thinking for seeing various aspects with various view points needed in controversial issues related with energy and environment.

• Journal of The Korean Association For Science Education
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• v.33 no.3
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• pp.569-580
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• 2013

This study examined how a Structured Reading Framework (SRF) is related to improving students' critical thinking ability in an argument-based inquiry approach, called the Science Writing Heuristic (SWH) approach. A total of 75 $8^{th}$ graders participated in the study, with 34 in the control group and 41 in the treatment group. The gains in critical thinking skills were compared between two groups, and relationships among the components of the reading framework and the critical thinking skills were explored at the group level. Result indicates that the treatment group who used the SRF had larger gains in critical thinking scores than control group who used the Original Reading Framework (ORF). In addition, results show that the correlations between Reading Framework (RF) components and critical thinking scores are statistically significant in the treatment group, while no correlations exist in the control group. It appears that using the SRF have an impact on developing students' critical thinking ability by providing a scaffold to assist argumentation practice.

• Journal of Korean society of Dental Hygiene
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• v.16 no.3
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• pp.401-407
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• 2016

Objectives: The purpose of the study was to investigate the correlation between critical thinking disposition and self-efficacy in dental hygiene students. Methods: This is a cross-sectional study. A self-reported questionnaire was completed by 486 dental hygiene students in for colleges Jellabukdo from March to June, 2016. The study instrument included general characteristics of the subjects, critical thinking disposition, and self-efficacy. The instrument for critical thinking disposition was adapted from Yoon and consisted of intellectual zeal/curiosity, prudence, self-confidence, systemicity, intellectual impartiality, sound skepticism, and objectivity. Each question was measured by Likert 5 point scale. Cronbach's alpha was 0.73 in the study. The instrument for self-efficacy was adapted from Kim and consisted of self-efficacy confidence, self-regulation efficacy, and task difficulty choice using Likert 5 point scale. Cronbach's alpha was 0.73 in the study. Results: The correlation between critical thinking disposition and details of each area showed a strong correlation. The strongest positive correlation in passion was 0.721 for curiosity and critical thinking disposition overall(p<0.01). Conclusions: It is necessary to develop the program for critical thinking disposition and self-efficacy in the dental hygiene students.

• Steel and Composite Structures
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• v.14 no.3
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• pp.295-312
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• 2013

In this paper, a simplified approach based on critical temperature for fire resistance design of steel-concrete composite beams is proposed. The method for determining the critical temperature and fire protection of the composite beams is developed on the basis of load-bearing limit state method employed in current Chinese Technical Code for Fire safety of Steel Structure in Buildings. Parameters affecting the critical temperature of the composite beams are analysed. The results show that at a definite load level, section shape of steel beams, material properties, effective width of concrete slab and concrete property model have little influence on the critical temperature of composite beams. However, the fire duration and depth of concrete slab have significant influence on the critical temperature. The critical temperatures for commonly used composite beams, at various depth of concrete and fire duration, are given to provide a reference for engineers. The validity of the practical approach for predicting the critical temperature of the composite beams is conducted by comparing the prediction of a composite beam with the results from some fire design codes and full scale fire resistance tests on the composite beam.