• 한국소성가공학회:학술대회논문집
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• 한국소성가공학회 2002년도 춘계학술대회 논문집
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• pp.163-168
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• 2002

Hot forging is widely used in the manufacturing of industry machine component. The mechanical, thermal load and thermal softening which are happened by the high temperature in hot forging process. Tool life decreases considerably due to the softening of the surface layer of a tool caused by a high thermal load and long contact time between the tool and billet. Also, tool life is to a large extent limited by wear, heat crack and plastic deformation in hot forging process. These are one of the main factors affecting die accuracy and tool life. That is because hot forging process has many factors influencing tool life, and there was not accurate in-process data. In this research, life prediction of hot forging tool by wear and plastic deformation analysis considering tempering parameter has been carried out for automobile component. The new developed technique in this study for predicting tool life can give more feasible means to improve the tool life in hot forging process.

• 대한디지털의료영상학회논문지
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• 제15권2호
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• pp.1-6
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• 2013

This study is to provide clinical data when reverse-water's-view was carried out about pediatric who did not communicate by applying self-development jaw lift tool. This study were conducted in a subject of 23 children who examined revers-water's-view from 2013 July 6 to 2013 August 5 at our hospital. Two group time which were carried out revers-water's with tool and without tool were measured. also, Image of two group were evaluated. Evaluation data obtained by measuring the average difference were analyzed by independent-t-test. After apply self-development-jaw-lift-tool, time was reduced by 35.2%(36.6sec). the results indicated significant differences(p< .05). Image evaluation was increase 43.5%(1.03point), It was statistically highly significant difference (p< .01). If apply self-development-jaw-lift-tool in pediatric revers-water's-view, operator can provide fast, convenience, high quality image to pediatric.

• 한국공작기계학회:학술대회논문집
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• 한국공작기계학회 2003년도 추계학술대회
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• pp.83-88
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• 2003

In this study, experiments were conducted with an ultra-precision machine, developed In domestic, to find the characteristics and the most suitable cutting conditions of ultra-precision machining. To maximize the performance of the machine, the machine was installed in a room that is protected from vibration and is maintained constant temperature and constant humidity. Selected work pieces are an aluminum-alloyed material, which has excellent corrosion resistance and has low deformation. The used tool is synthetic poly crystal diamond which has excellent abrasion resistance and has low affinity. Four types of tool nose radius were used such as 0, 0.1, 0.2 and 0.4mm. Machining is performed with cutting speed of 500, 800 and 1000m/min., feed rate of 0.005, 0.008, 0.010mm/rev. and cutting depth of 0.0005, 0.0025 and 0.005mm respectively which can generally be used in the field as a cutting condition. As a method of evaluation surface roughness was measured for each cutting condition and reciprocal characteristics are computed for each tool nose radius, cutting speed, feed rate and cutting depth. As a result the most suitable cutting condition and characteristics of ultra-precision machining were identified which can usefully be applied in the industrial field.

• 한국공작기계학회논문집
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• 제13권1호
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• pp.9-15
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• 2004

In this study, experiments were conducted with an ultra-precision machine, developed in domestic, to find the characteristics and the most suitable cutting conditions of ultra-precision machining. To maximize the performance of the machine, the machine was installed in a room that is protected from vibration and is maintained constant temperature and constant humidity. Selected work pieces are an aluminum-alloyed material, which has excellent corrosion resistance and has low deformation. The used tool is synthetic poly crystal diamond, which has excellent abrasion resistance and has low affinity. Four types of tool nose radius were used such as 0, 0.1, 0.2 and 0.4mm. Machining is performed with cutting speed of 500, 800 and 1000m/min., feed rate of 0.005, 0.008, 0.010mm/rev. and cutting depth of 0.0005, 0.0025 and 0.005mm respectively which can generally be used in the field as a cutting condition. As a method of evaluation, surface roughness was measured for each cutting condition, and reciprocal characteristics are computed for each tool nose radius, cutting speed, feed rate and cutting depth. As a result, the most suitable cutting condition and characteristics of ultra-precision machining were identified which can usefully be applied in the industrial field.

• 한국간호교육학회지
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• 제4권2호
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• pp.172-186
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• 1998

This study is intended to develop a reliable and approproate instrument of the clinical nursing education. This research consisted of 4 step. First step is contruction of the content for evaluation. Second step have the research of the content validity by 10 professors in Department of Nursing, H University, the pilot study for the content validity by 20 professors and clinical preceptors, and the survey with four point Likert Scale, which includes from the point of 'strongly valid' to the point of 'strongly non-valid' by 250 professor and clinical preceptor. The data were collected form March 1998 to July 1998. This study was analyzed by Cronbach's for the reliability and the factor analyisis for the validity of the collected data. The third step showed the final evaluation instrument of clinical nursing education which consists a couple of tool. One is the evaluation instrument of clinical nursing which includes the 20 items, the other is the evaluation instrument for case study which includes the 15 items. The fourth step is the test of reliability and validity of the final evaluation too. The results from these step's study showed the higher reliability and validity. Respectly, Cronbach's revealed the evaluation instrument of clinical nursing and case study is Cronbach's $\alpha$=.92413, Cronbach's $\alpha$=.95602. For further research, it needs to develop a reliable and variable instrument of the students self-evaluation and community based instrument.

• 한국융합학회논문지
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• 제10권5호
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• pp.221-228
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• 2019

대학의 교양교육은 전공교육에 비해 본래의 교육적 의의를 살리지 못하고 있다는 문제에 직면해 있다. 이 문제를 해결하기 위한 가장 시급한 단계는 바로 현재 각 대학이 편성 운영 중인 교양교육에 대한 정확한 진단에서 출발한다고 볼 수 있다. 이에 본 연구는 대학의 교양교육을 평가할 수 있는 교양교육과정 평가도구의 개발에 목적을 두고 있다. 본 연구는 기존 선행연구들이 이론적으로 교양교육과정 평가도구를 단편적으로 나열한 것에서 벗어나, 평가항목 간 상대적 중요도를 AHP 분석기법을 통해 확인함으로써 평가도구의 배점을 결정하였다. AHP 분석 결과 교양교육과정의 편성, 운영, 평가 중 편성의 영역이 가장 중요하다고 나타났으며, 후순위로는 운영과 평가 영역으로 나타났다. 전체 22개 평가 지표 중 가장 높은 가중치로 결정된 지표는 "교과목 편성의 적절성"으로 나타났으며, 2순위로 "교양교육과정 목표의 적절성"이 선정되었다.

• 디지털산업정보학회논문지
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• 제13권1호
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• pp.13-21
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• 2017

This paper describes a design scheme of a system that tests or polls from the students at online class. By online test, the teacher can test the pre-knowledge level of the students and know how much students understand the lecture of the class. As the number of test increases, the burden of the preparation of setting question, evaluation of the test, and management of the test results is increased. In this environments, an online test management system make it easy to test and evaluate, and thus it would be a good tool for maintaining and managing the total procedure of the test or poll of the students. For evaluating the design of the system, we made a test system prototype and performed evaluations of the online test system. The online test and evaluation system provides a good tool for testing and evaluation of student's knowledge at the class with easy and fast way.

• International Journal of Contents
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• 제7권3호
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• pp.48-59
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• 2011

The present thesis is on a construction of the system which supports exhibition evaluation of curators, which automatically collects, keeps, and totalizes objective data on visitor behavior in museums, and which comprehensively displays the results by tables and graphs. The system is composed by access points and mobile exhibition exposition devices in the museum operating together. Obtainable visitor information include a user number, an average staying period, contents use hour, and exhibition viewing frequency. Prototype experiment at museums shows that the system is effective in efficient data collection and exhibition evaluation and is expected to become an information collecting tool for visitor research and an exhibition evaluation tool for exhibition improvement.

• 한국실내디자인학회논문집
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• 제26권4호
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• pp.22-29
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• 2017

This paper investigates the evaluation criteria in order to manage healing environment of long-term care elderly hospital. Elderly hospital evaluation tool developed by Korean Government is used to assess elderly hospital facilities to check the hospital facility and maintain its quality. However, the evaluation indicators and questions mainly focusing on safety indicators. Some questions are too vague for precise evaluation. In this paper, we discuss the advantages and disadvantages of the present evaluation criteria to establish new assessment tool for precise evaluation. The literature research was conducted tp set up the new evaluation criteria. From this research, we developed an elderly focusing on healing environment checklist for elderly care hospital which contains 7 factors as the primary hierarchy structure (Safety, Accessibility, Amenity, Sensibility, Friendly to nature, Territory, Interaction) and 23 factors as the secondary hierarchy structure. This evaluation criteria will help healthcare facility designers and healthcare organizations to build the healthcare facilities.

• 한국생산제조학회지
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• 제24권2호
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• pp.166-171
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• 2015

In this study, an automation tool was developed for rapid evaluation of machine tool spindle designs with automated three-dimensional finite element analysis (3D FEA) using solid elements. The tool performs FEA with the minimum data of point coordinates to define the section of the spindle shaft and bearing positions. Using object-oriented programming techniques, the tool was implemented in the programming environment of a CAD system to make use of its objects. Its modules were constructed with the objects to generate the geometric model and then to convert it into the FE model of 3D solid elements at the workbenches of the CAD system using the point data. Graphic user interfaces were developed to allow users to interact with the tool. This tool is helpful for identification of a near optimal design of the spindle based on, for example, stiffness with multiple design changes and then FEAs.