• 한국지반공학회:학술대회논문집
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• 한국지반공학회 1999년도 봄 학술발표회 논문집
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• pp.159-166
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• 1999

One of the most general methods that can evaluate the rippability is the seismic exploration. However, most field engineers have hardly used the seismic exploration. Instead of using the seismic exploration, they have usually used rock hammer and naked eyes to confirm the degree of rippability for soil, ripping rock and blasting rock. Therefore, to excavate the ground rationally, it is required to establish a quantitative criterion that can be used for distinguishing rippability. In this study, we find out the characteristics of rock strength through laboratory and field tests. The weathering condition of rock exposed to air due to excavation of soil layer and the variation of rock strength caused by weathering were investigated. A relationship between rock strength values that are obtained from uniaxial compression test, slaking durability test, point load test, schmidt hammer test and absorption ratio test is analyzed. The relationship is expressed in a form of equation by which we can evaluate the rock strengths obtained from simple laboratory and field tests. To evaluate rippability in a reasonable manner, a quantitative approach is proposed and a check list of rippability is developed based on the proposed methodology. It is recommended to modify the proposed method for evaluation of rippability in the field.

• 디지털산업정보학회논문지
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• 제10권2호
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• pp.1-11
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• 2014

Software reliability in the software development process is an important issue. Software process improvement helps in finishing with reliable software product. In this field, SPC (Statistical process control) is a method of process management through application of statistical analysis, which involves and includes the defining, measuring, controlling, and improving of the processes. The proposed process involves evaluation of the parameter of the mean value function and hence the values of the mean value function at various inter failure times to develop relevant time control chart. In this paper, was proposed a control mechanism, based on time between failures observations using Rayleigh and Burr distribution property, which is based on Non Homogeneous Poisson Process (NHPP). In this study, the proposed model is reliable in terms of hazard function, because it is more efficient in this area can be used as an alternative to the existing model. Through this study, software developers are considered by the various intended functions, prior knowledge of the software to identify failure modes to feed to some extent shall be able to help.

• 에너지공학
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• 제10권4호
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• pp.299-309
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• 2001

본 원통다관형 열교환기 설계 코드는 기존에 적용된 Bell-Delaware법 보다 한 차원 발전된 유동 해석법을 적용하여 좀더 정확하고 향상된 열교환기를 설계 하고자 한다. 열교환기 설계에 영향을 미치는 주요한 인자들에 대한 특성 및 설계 범위를 나타내었다. 유동 분율을 구하기 위한 유동 해석(Stream analysis)법에 대한 개략적인 소개와 열교환기 설계를 위한 순서도를 나타내었다. 설계 코드의 성능평가를 위하여 Delaware09, Delaware10, DongHwa, ANL에 대한 실험결과와 성능 비교를 수행하였다. 그 결과 열전달 및 압력 손실 예측치의 대부분이 $\pm$30% 이내에 만족함을 보였으나, 압력손실 부분에서는 전체적으로 과예측 결과를 나타내었다.

• 보건행정학회지
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• 제4권2호
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• pp.111-125
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• 1994

In developing total hospital information system, large amount of time and expense are to be spent while its results are likely to lead itself to end-users' dissatisfaction. Some of the main complaints on the part of end-users come from insufficient consideration of end-users environment as well as inappropriate representation of their requirement in the system alalysis and design. This papre addresses some advantages of Essential Logical Modeling Process for better analysis and design, explaining by example the developmental process of the Patent Management and Accounting System for a tertiary care hospital. In the case, the Essential Model, suggested by McMenamin and Palmer, proved to be an effective tool for clear separation of analysis and design phase and for better communication among system developers and with end-users. The modeling process itself contributed to better program modularity as well, shown in a Structured Chart. Difficulties in learning how to identify' essential activities' for the modeling practice were experienced in the beginnins stage, which were, however, overcome by elaborating some heuristic guideling and by rdferring to necessary tools including State Transition Diagram, Control Flow Diagram, and so many. While full evaluation of the Essential Model usag remains to wait till the completion of the case project, its strengt in making clear distinction between analysis and design phase was enough to be attractive to system analysts. The model concepts are open to many further application fields, particularly such areas as business re engineering, process remodeling, office automation, and organizational restructuring.

• 한국보건간호학회지
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• 제28권3호
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• pp.619-632
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• 2014

Purpose: This study was conducted in order to analyze the job of school health teacher in Korea. Methods: School health teachers' roles were analyzed by DACUM job analysis. Guide of DACUM methods and workshop were directed by a DACUM job analyst. The DACUM committee identified tasks associated with each duty and completed the DACUM chart. Results: Through DACUM job analysis, the roles of school health teachers were defined; one who manages health of students and staff, and conducts health education; 11 duties and 95 tasks were identified. The committee listed required knowledge and skills, working attitude, and future trends. Emergency and common disease care were the best critical duties, followed by health education, counseling, and self-development. Conclusion: School health teacher plays the roles of nurse and health care manager, and teacher. According to the expansion of health care needs and health education, school health teachers are placed in more essential and critical areas. Their duties and tasks are various and have changed significantly, thus the School Health Act should be changed practically. The results of this study can be used in development of training programs or evaluation of the job performance of school health teachers.

• 한국전자통신학회논문지
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• 제8권5호
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• pp.687-693
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• 2013

본 연구는 스마트폰 기반의 초등학교 컴퓨터 교육을 위한 디지털 교과서를 설계하고 구현한 것으로서, 디지털 교과서의 장점인 상호작용성을 극대화하여 개인의 수준과 선택에 따라 자율적으로 공부 할 수 있는 자기주도 학습능력을 배양할 수 있는 방법을 제안한다. 디지털 교과서의 콘텐츠로 본 연구에서는 엑셀의 차트 기능을 활용하였다. 구현된 디지털 교과서를 초등학교 학습자들을 대상으로 평가해본 결과 기존에 활용되던 인쇄형 자료에 비해 차트를 작성하는 과제의 수행시간이 단축되었다.

• 대한방사선기술학회지:방사선기술과학
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• 제14권1호
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• pp.23-28
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• 1991

Automatic exposure control systems are now readily available and widly used in radiography. A device that automatically determines the amount of radiation required to produce an acceptable level of film blackness is called a phototimer, or automatic exposure control. There are limitations in the use of phototimers ; however, equipment can be used much more effectively if one recognize these limitations, and the goal of obtaining a properly exposed, reproducible radiography can be achieved. We have some results in this experimental study. The variations of film density due to kVp are in propotion to below 80 kVp range. But indicate constant level above 80 kVp to 120 kVp. The characteristic density variation by phantom thickness shows the higher the thiner in exit type. AEC system have a density control that is designed to make adjustments increase or decreas the density 10% per step or 25% per step. The automatic exposure control circuits must meet the several regulations of the HEW. Some forms of technique chart is recomened for use of AEC.

• 환경영향평가
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• 제10권2호
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• pp.135-145
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• 2001

This study was conducted to investigate the practical using of Geographic Information System(GIS) technology which are computer-based systems that are used to store and manipulate geographic information on the air pollution control and management in the macro city. For this study 130 samples were corrected by passive sampler in Seoul (25 distincts) distributed by TM-coordinate during November in 1997 to January 1998, and analysed by GC/MSD for 16 VOCs e.g., toluene, benzene and display using Arc/view GIS(version 3.2, ESRI Inc, U.S.A) for windows. The most VOCs concentration distribution in November, 1997 was higher than that of January, 1998 except benzene and 1,1,2-trichroloethan, bromobenzene. And products of the distribution of VOCs concentration display using GIS technology was effective as well as other display methods(e.g., contouring method, pie or column chart, graduated symbols), especially in mapping and symbolization capabilities for spatial pollutant status evaluation were very effective than other display methods.

• Computers and Concrete
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• 제6권5호
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• pp.357-376
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• 2009

In the design of concrete columns, it is important to provide some nominal flexural ductility even for structures not subjected to earthquake attack. Currently, the nominal flexural ductility is provided by imposing empirical deemed-to-satisfy rules, which limit the minimum size and maximum spacing of the confining reinforcement. However, these existing empirical rules have the major shortcoming that the actual level of flexural ductility provided is not consistent, being generally lower at higher concrete strength or higher axial load level. Hence, for high-strength concrete columns subjected to high axial loads, these existing rules are unsafe. Herein, the combined effects of concrete strength, axial load level, confining pressure and longitudinal steel ratio on the flexural ductility are evaluated using nonlinear moment-curvature analysis. Based on the numerical results, a new design method that provides a consistent level of nominal flexural ductility by imposing an upper limit to the axial load level or a lower limit to the confining pressure is developed. Lastly, two formulas and one design chart for direct evaluation of the maximum axial load level and minimum confining pressure are produced.

• 의학교육논단
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• 제17권1호
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• pp.26-32
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• 2015

Recently, the student internship has been introduced in medical schools as a way of preparing students with training experience and medical knowledge by performing clinical practice. This study discusses student internship management and ways to operate the internship effectively. Catholic University of Daegu School of Medicine has set up a 6-week internship program for fourth-year undergraduate students. In most of the sections, students have shown their satisfaction, particularly when they have received appropriate feedback and attention from their professors. The students found that performing the evaluation and treatment of patients and individual chart recording were informative and helpful. However, they felt a lack of basic knowledge and clinical skills and had difficulty in understanding their roles and in time management. The success of an internship depends on the passion and interest that professors show for their students along with active support from the other faculty and thoughtful consideration of patients and all their friends and family members. In addition, with growing awareness of the need for the student internship, it is necessary that the school executive provide financial and administrative support to the faculty and staff, clarify roles and the work needed to perform the tasks, ensure substantiality of the individual program with professors or departments, provide enough preliminary courses, and monitor outcomes and reflection.