• Nuclear Engineering and Technology
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• 제54권3호
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• pp.834-841
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• 2022

System thermal-hydraulic (STH) code is adopted for nuclear safety analysis. The critical flow model (CFM) is significant for the accuracy of STH simulation. To overcome the defects of current CFMs (low precision or long calculation time), a CFM based on a genetic neural network (GNN) has been developed in this work. To build a powerful model, besides the critical mass flux, the critical pressure and critical quality were also considered in this model, which was seldom considered before. Comparing with the traditional homogeneous equilibrium model (HEM) and the Moody model, the GNN model can predict the critical mass flux with a higher accuracy (approximately 80% of results are within the ±20% error limit); comparing with the Leung model and the Shannak model for critical pressure prediction, the GNN model achieved the best results (more than 80% prediction results within the ±20% error limit). For the critical quality, similar precision is achieved. The GNN-based CFM in this work is meaningful for the STH code CFM development.

• 영어어문교육
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• 제12권1호
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• pp.1-27
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• 2006

This study investigated how EFL readers critically read texts which are written in English. Although critical reading has been discussed in advanced EFL and ESL contexts there has not been much research on the critical reading of beginning EFL learners. Many educators are recommending that a critical perspective be adopted so that L2 learners can become empowered rather than indoctrinated. In this study, the researcher has examined the critical reading practices of five beginning level EFL readers in Korea and five first language readers of English in the United States as they read a news editorial article. The significant findings were discussed related to critical reading practice of L2 readers. The findings of the study can help the educators in English education in improving the curriculum, the teaching methodology and the learning theory for EFL reading for critical reading.

• 산업공학
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• 제16권3호
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• pp.344-351
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• 2003

Critical dimension is one of the most important characteristics of up-to-date integrated circuit devices. Hence, critical dimension control in a semiconductor wafer fabrication process is inevitable in order to achieve optimum device yield as well as electrically specified functions. Currently, in complex semiconductor wafer fabrication processes, statistical methodologies such as Shewhart-type control charts become crucial tools for practitioners. Meanwhile, given a critical dimension sampling plan, the analysis of variance technique can be more effective to investigating critical dimension variation, especially for on-chip and on-wafer variation. In this paper, relating to a typical sampling plan, linear statistical models are presented for the analysis of critical dimension variation. A case study is illustrated regarding a semiconductor wafer fabrication process.

• 한국농공학회지
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• 제28권2호
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• pp.87-92
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• 1986

The differential equation, which can determine the dynamic critical loads for low parabcoic arches, is derived in this study. The dynamic critical loads of the parabolic arches subjected to a concentrated step load are nummerically analyzed for the changes of load positions. In cases of arches with different end conditions (both hinged, fixed hinged, both fixed), the effect of end conditions and that of the rises are investigated in detail. The summary of the results are the following: 1)The snapthrough does not occur when the rise of arch is very low, and the bifurcation appears clearly as the rise of arch increases. 2)The regions in which the dynamic critical loads are not defined for the both ends fixed are broader than that for the both ends hinged. 3)For all case, the load positions of minimum dynamic critical loads exsit at the near position from the end hinged. Thus, the results obtained in present study show that the magnitude of dynamic critical loads, the load positions of minimum dynamic critical loads and the regions in which the dynamic critical loads are not defined depend on end conditions of arches.

• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 2003년도 춘계학술대회 논문집
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• pp.1358-1361
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• 2003

In this study, intrinsic static/dynamic fracture toughness of Al 7175-T74 are evaluated from the apparent static/dynamic toughness of notched specimen. The notch/crack critical average stress fracture model is suggested to establish the relationship to predict the intrinsic fracture toughness from the apparent fracture toughness of a notched specimen. The notch/crack critical average stress fracture model is established using the relation between the notch root radius and the effective distance calculated by finite element analysis. It is conclude that the true fracture toughness can be estimated from test results of apparent fracture toughness measured by using a notched specimen. Also, critical notch root radius can be predicted by notch/crack critical average stress fracture model.

• 한국실내디자인학회논문집
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• 제13권6호
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• pp.20-28
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• 2004

The purpose of this research is to understand and explore the view of the current architectural and interior design approach through Critical Regionalism created as one of the movements opposed to Contemporary. Critical Regionalism as a critical view about the contemporary architecture is based on integrated critical thinking toward a built environment surrounded by regional facts such as natural environment, materials, light, weather, unique culture where exist the specific places. The architectural themes of Critical Regionalism based on Kenneth Frampton's view and interpretation about contemporary architecture can be understood as follows; the concept of the place, tectonics, expression by abstraction and phenomenologlcal interpretation. Critical Regionalism has two distinctive features, which are the connection to the Contemporary and critical aspects to develop processes of an architectural design.

• 수산해양교육연구
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• 제17권2호
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• pp.240-251
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• 2005

The purpose of this study was to examine the relationship between critical thinking and academic achievement. Subjects were 396 junior and 371 senior high school students in Busan. The instruments used in this study were Cornell Critical Thinking Test and Academic Achievement Test. The results were as follows : First, there was a sinificant grade level difference in critical thinking. Second, there was a signficant sex difference in critical thinking and there was a significant interaction effect by grade level and sex. Third, critical thinking was significantly related to the students' academic achievement. The implications were discussed and recommendations for future research were made.

• 간호행정학회지
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• 제8권1호
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• pp.123-135
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• 2002

Purpose: In this study, the critical pathway for laparoscopic cholecystectomy patients was developed and applied for clinical study. The effectiveness of the critical pathway was analyzed. Method: The subjects with no critical pathway services of this study were 30 laparoscopic cholecystectomy operation patients, who were hospitalized in B General Hospital in Busan from Nov. 28. 2000 to May 2. 2001. The subjects with critical pathway services of this study were 30 laparoscopic cholecystectomy operation patients, who were hospitalized in B General Hospital in Busan from June. 11. 2001 to Oct. 31. 2001. Results: 1. Development for critical pathway Preliminary critical pathway for the laparoscopic cholecystectomy patients was developed though analysis of the reference and 34 case of medical record. The items on the y-axis were assessment, test, treatment, diet, fluid, consult, medication, activity and education and the items on the x-axis were till 3days after operation. The developed critical pathway was applied in clinical field. 2.　Effectiveness of application on developed critical pathwayPost operational complication was not found in neither the critical pathway using Group nor Non-using Group. Hospitalization period mean was 4.63 days for the using Group and 5.93 days for the Non-using Group(P=.001). The mean cost for medical examination and treatment for the using Group was 786,270 won, 117,454 won(12.9%) less than that of the Non-using Group, 903,724 won(P=.000). The degree of satisfaction for the using group was 3.7 points, for the Non-using Group, 3.15 points. The degree of satisfaction for the used Group was 0.55 points higher than that for the Non-using Group and there was a statistically significant difference(P=.000). Concousion: From results of this study, Using the critical pathway in the laparoscopic cholecystectomy operational patients was effective in decreasing the hospitalization period and cost, and increasing the satisfaction about the medical service.

• 보험의학회지
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• 제25권
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• pp.63-77
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• 2006

국내 CI보험에서 정의한 '중대한 암'이란 용어는 의학적인 '암'의 정의보다는 다소 보험적인 의미를 가진 암으로 정의되고 있다. 따라서 의학적으로 정의된 암과 다른 보험적인 의미에서 암을 정의함에 따라 의료인이나 일반인이 생각하고 있는 암의 정의와 다른 개념의 차이로 보험사와 계약자간의 Medical Underwriting에서 많은 문제점이 있을 것으로 판단되었다. 이처럼 CI보험에서 정의한 '중대한 암'의 정의가 의학적 정의된 '암'과의 차이로 보험사와 계약자간의 분쟁의 소지가 될 수 있는 '중대한 암'의 Medical Underwriting의 제한적 요소로는 제I항의 정의에서 1) '암'과 '중대한 암'의 정의에 차이에 따른 보험사, 계약자, 의료인의 입장에서 본 제한적 요소 2) "악성신생물분류표"가 가지는 의미에 관한 제한적 요소 3) '중대한 암'과 '고액치료비 암'의 용어에 대한 제한적 요소를 고찰하였다. 제II항의 정의에서는 1) 암성의 변화에 따른 제한적요소 2)악성병변 부위가 국한된 경우 병리조직검사에서 악성으로 나타나지 않은 경우의 제한적 요소 3) 병원간 병리조직 검사결과의 차이에 따른 제한적 요소에 관해 고찰하였다. 제III항의 정의에서는 1) 하위조항이 상위조항에 위배되는 경우의 제한적 요소 2) 임상적 악성에 대한 제한적 요소를 고찰하였다. 그 외에도 '중대한 암'에서 제외되는 암으로 1)악성흑색종에서 침범정도가 낮은 경우 2) 초기전립샘 암 3) HIV에 관련된 악성종양 4) 악성흑색종을 제외한 모든 피부암들에 대한 제한적인 요소 5) 양성종양,전암병소,상피내암,경계성종양 등이 임상적으로 '중대한 암'으로 인정되는 경우와 진단서 작성에서의 제한적 요소를 고찰하여 '중대한 암'에 대한 Medical Underwriting의 문제점을 파악하였다.

• 한국콘텐츠학회논문지
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• 제11권12호
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• pp.998-1006
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• 2011

이 연구의 목적은 일개 대학 간호과 3학년 학생의 중환자 간호 수행 능력, 중환자 간호지식 및 실습만족도의 관계를 확인하는 연구이다. 자료는 2009년 6월에 85명의 간호학생을 대상으로 중환자 간호 수행 능력, 중환자 간호 관련 지식 및 실습만족도에 관한 질문지를 통해 수집되었다. 연구결과, 전체 중환자 간호수행 능력 평균 점수는 84.01점이었고, 전체 중환자 간호 관련 지식은 6.99점, 중환자 실습 만족도는 86.88점 이었다. 중환자 간호 수행 능력은 일반적인 중환자 간호 수행 능력이 가장 높았으며 신경계 간호수행력, 순환기계 간호수행력, 호흡기계 간호수행력 순으로 나타났다. 중환자 간호지식은 순환기계 관련 지식이 가장 높았고, 일반적인 중환자 간호 지식, 호흡기계 간호지식, 신경계 간호지식 순으로 나타났다. 중환자 간호수행 능력은 중환자 실습 만족도와 유의한 긍정적 상관관계가 있었지만, 중환자 간호 관련 지식과는 상관관계가 없었다. 결론적으로, 간호학생의 중환자 간호 수행 능력을 향상시키고 중환자 실습만족도를 향상시키기 위해서 간호학생의 수행능력이 낮게 나타난 호흡기계 및 순환기계 중환자 간호를 향상시킬 수 있는 현장 실습 및 교내 실습교육에 관한 개발이 필요함을 본 연구가 시사했다.