• 전기학회논문지
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• 제57권3호
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• pp.514-517
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• 2008

Ubiquitous healthcare (U-healthcare) system is one of potential applications of embedded system. Conventional U-healthcare systems are used in health monitoring or chronic disease care based on measuring and transmission of various vital signs. However, future U-healthcare system can be of benefit to more people such as stroke patients which have limited activity by providing them proper medical care as well as continuous monitoring. Recently, an electric brain stimulation treatments have been found to be a better way compared to conventional ones and many are interested in using the method toward the treatment of stroke. In this study, we proposed a remote medical treatment system using ZigBee-based wireless electric brain stimulator that can help them to get a treatment without visiting their doctors. The developed remote medical treatment system connects the doctors to the brain stimulator implanted in the patients via the internet and ZigBee communication built in the brain stimulator. Also, the system receive personal information of the connected patients and cumulate the total records of electric stimulation therapy in a database. Doctors can easily access the information for better treatment planning with the help of graphical visualization tools and management software. The developed remote medical treatment system can extend their coverage to outdoors being networked with hand-held devices through ZigBee.

• 한국정밀공학회지
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• 제30권2호
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• pp.223-230
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• 2013

When a new nuclear fuel is developed, an irradiation test needs to be carried out in the research reactor to analyze the performance of the new nuclear fuel. In order to check the performance of a nuclear fuel during the irradiation test in the test loop of a research reactor, sensors need to be attached in and out of the fuel rod and connect them with instrumentation cables to the measuring device located outside of the reactor pool. In particular, to check the temporary temperature change at the center of a nuclear fuel during the irradiation test, a thermocouple should be instrumented at the center of the fuel rod. Therefore, a hole needs to be made at the center of fuel pellet to put in the thermocouple. However, because the hardness and the density of a sintered $UO_2$ pellet are very high, it is difficult to make a small fine hole on a sintered $UO_2$ pellet using a simple drilling machine even though we use a diamond drill bit made by electro deposition. In this study, an automated drilling machine using a CVD diamond drill has been developed to make a fine hole in a fuel pellet without changing tools or breakage of workpiece. A sintered alumina ($Al_2O_3$) block which has a higher hardness than a sintered $UO_2$ pellet is used as a test specimen. Then, it is verified that a precise hole can be drilled off without breakage of the drill bit in a short time.

• Journal of Electrical Engineering and Technology
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• 제7권3호
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• pp.376-383
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• 2012

A number of scientific researches are currently being conducted on the potential health hazards of power frequency electric and magnetic field (EMF). There exists a non-objective and psychological belief that they are harmful, although no scientific and objective proof of such exists. This possible health risk from ELF magnetic field (MF) exposure, especially for children under 17 years of age, is currently one of Korea's most highly contested social issues. Therefore, to assess the magnetic field exposure levels of those children in their general living environments, the personal MF exposure levels of 436 subjects were measured for about 6 years using government funding. Using the measured database, estimation formulas were developed to predict personal MF exposure levels. These formulas can serve as valuable tools in estimating 24-hour personal MF exposure levels without directly measuring the exposure. Three types of estimation formulas were developed by applying evolutionary computation methods such as genetic algorithm (GA) and genetic programming (GP). After tuning the database, the final three formulas with the smallest estimation error were selected, where the target estimation error was approximately 0.03 ${\mu}T$. The seven parameters of each of these three formulas are gender (G), age (A), house type (H), house size (HS), distance between the subject's residence and a power line (RD), power line voltage class (KV), and the usage conditions of electric appliances (RULE).

• 한국자동차공학회논문집
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• 제21권2호
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• pp.9-16
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• 2013

The comparisons of performance characteristics between the super-mirror face grinding machine using variable air pressure developed in this laboratory to grind precisely the sliding face of a surface hardened workpiece with thermal spray and the conventional one are investigated by measuring the surface roughness and hardness for a SCM440. To process variously workpiece according to shape, size and materials, the rotating and contacting forces of the developed grinding machine can be changed by air pressure. The surface roughness of processed workpiece can be also attained to state of mirror face by grinding precisely the sliding face with changing the rotating speed of diamond wheel. It is possible to be attached to the various machine tools because the super-mirror face grinding machine using variable air pressure is a small size. The grinding efficiency is elevated because it can be worked by two or more grinding machines attached to concurrently a machine tool for the large workpiece. In this study, results show that the cusp height of the super-mirror face grinding machine for the particle size of 100 and $1500No./mm^2$ is lower than that of the conventional one because the vibration is reduced by rotating very fast the diamond wheel with a pressed air and it can be processed by rotating the diamond wheel with a constantly varied air pressure perpendicular to workpiece surface, and that the workpiece in the super-mirror face grinding machine for the particle size of $3000No./mm^2$ can be processed to state of mirror face that is rarely seen by the cusp height. It is also found that the surface hardness of both the conventional and the super-mirror face grinding machines are increased as the particle size of diamond wheel is reduced, and the surface hardness of the super-mirror face grinding machine is HRC 1.1 ~ 1.8 higher than that of the conventional one.

• 한국컴퓨터정보학회논문지
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• 제27권3호
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• pp.225-238
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• 2022

인공지능 리터러시에 대한 중요성이 증가하고 있지만, 인공지능 리터러시를 측정하기 위한 검사 도구가 부족한 상황이다. 따라서 본 연구에서는 중학생의 인공지능 리터러시를 측정하기 위한 검사 도구를 개발하였다. 검사 도구 개발을 위하여 전문가 집단을 구성하고, 검사 도구의 요인과 문항을 개발하였다. 개발한 검사 도구의 신뢰도와 타당도를 확보하기 위하여 현장 적합성 검토, 탐색적 요인 분석, 확인적 요인 분석을 진행하였다. 이러한 연구를 통하여 6개의 하위 영역과 30개의 문항을 가진 검사 도구를 개발하였다. 검사 도구의 하위 영역은 인공지능의 사회적 영향(8문항), 인공지능의 이해(6문항), 인공지능 실행 계획(5문항), 인공지능 문제 해결(5문항), 데이터 리터러시(4문항), 인공지능 윤리(2문항)가 있다. 검사 도구는 5점 리커트 척도로 응답하게 개발되었으며, 내적 일치도 계수는 전체가 .970이며, 하위 영역은 .861~.939이었다. 본 연구는 인공지능 리터러시의 발달 과정 분석, 교수-학습, 교육과정 등의 연구에 활용될 수 있다.

• 의학교육논단
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• 제25권2호
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• pp.132-138
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• 2023

Cohorts are established and operated at medical schools as part of efforts to improve the quality of education. Chosun University College of Medicine clarified the purpose of establishing three cohorts in light of its core values and developed criteria and indicators for each purpose. An organization focusing on cohort construction and operation was established as the Cohort Committee under the Quality Improvement Committee, and guidelines were proposed. In addition, a database and system were developed to handle primary data efficiently, and tools for measuring psychological variables were created. The data collected by establishing a cohort, regions, and admission types of graduates were first analyzed for the following projects: (1) an analysis of the educational process and quality improvement to educate medical professionals who contribute to the community after graduation, and (2) an analysis of the educational process and quality improvement to secure excellence in the medical field (e.g., knowledge and clinical reasoning), using information on the academic achievements of students and graduates as primary data. Chosun University College of Medicine is conducting cohorts and longitudinal studies gradually, starting with a simple, practically feasible system to solve the difficulties faced in cohort establishment and operation. Medical educators hope that future data collection and analysis will improve the quality of medical school education and have practical implications.

• 대한예방한의학회지
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• 제9권1호
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• pp.17-36
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• 2005

The objective of this study is to present basic data for producing tools to measure Yangseng of the elderly aged older than 65 by reassessing the validity and reliability of such tools already developed. In the present study, total 855 subjects were divided into 4 groups and given 31 question for the ultimate factor analysis of each item. The results cloud be summarized as follows: 1. In case of 'don't have sex in drunken state or right after dinner'(the 31st item of sex live yangseng). factor loading came out proportionally in 3 factors such as factor 4=0.358, factor 5=0.389 and factor 6=0.386. As they all failed to reach the general standard of 0.5 or more and even the minimum standard of 0.4 or more, the 31st item was deleted from the questionnaires. 2. From the factor analysis after exclusion of the 31st item, factor loading of the 25th item of sleep yangseng 'go to bed and get up regularly' appeared to be proportional in 2 factor(factor 4=0.393 and factor 7=0.373). Since it was shown that the 25th item could not be classified into a category but interacted with others in common and didn't satisfy the minimum standard of 0.4, it was deleted form the questionnaires, too. 3. From the factor analysis conducted after excluding the item numbers 31 and 25, factor loading of the 12th item of diet yangseng 'do not eat much' turned out to be relatively high with such values as factor 5=0.518 and factor 3=0.453. As it was, however, tied up with the factor of exercise yangseng, it was also deleted. In conclusion, 28 items after excluding the item numbers 12, 25 and 31 form 4 group showed the same results as divided into 8 factor with high grade of reliability and validity, evidencing the assumption that they can be employed practically to measure yangseng of the elderly aged 65 and oder.

• 한국과학교육학회지
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• 제38권3호
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• pp.355-367
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• 2018

이 연구의 목적은 학생들의 시스템 사고 수준을 측정하는 문항을 개발하기 위하여 첫째, 문헌 분석을 통해 시스템 사고 수준과 정의를 제시하고 둘째, 시스템 사고 정의와 수준에 근거하여 문항 개발을 위한 Framework을 개발하고 셋째, 시스템 사고 측정을 위한 열린 응답형 검사지를 채점할 수 있는 루브릭을 개발하는 것이다. 이를 위하여 문헌 분석 틀을 적용하여 국외 논문 60편에 대한 문헌 분석을 실시하였으며 분석된 내용을 근거로 시스템 사고 수준과 정의를 제시하였다. 그리고 시스템 사고 수준과 정의에 근거하여 각 수준별 핵심 아이디어와 평가 요소를 포함한 Framework을 개발하였다. 또한 순위선다형 문항 외에 열린 응답형 검사 문항의 채점을 위한 루브릭을 개발하였다. 루브릭은 Hung(2008)이 개발한 시스템 사고 측정을 위한 루브릭에 기반하여 연구팀에서 시스템 사고 수준과 정의에 적합하도록 문항과 위계를 수정하였다. 그리고 각 문항마다 1~5점 척도로 변환이 가능하도록 각 점수에 대한 정의를 제시하였다. 연구팀이 개발한 시스템 사고 수준과 정의, 문항 개발을 위한 Framework, 열린 응답형 검사지 채점을 위한 루브릭에 대하여 과학교육 전문가 7인에게 내용 타당도 검증을 의뢰하였으며 그 결과 CVI가 세 도구에서 모두 .95이상이 확인되었다. 이 연구 결과를 바탕으로 앞으로 학생들의 시스템 사고 수준을 측정할 수 있는 문항을 개발하고 개발된 문항에 대한 구인 타당도 및 준거 타당도 검증을 실시하고자 한다. 나아가 2015 개정 교육과정에서 강조하는 핵심 역량과 관련된 시스템 사고수준의 체계적인 측정을 위한 타당화 연구도 진행하고자 한다.

• 호스피스학술지
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• 제8권2호
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• pp.1-16
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• 2008

Hospice should help a patient maintain spiritual well-being and its attitudes toward death can have great effects on treatment and nursing of patients on terminal patient. The purpose of this study was to examine the differences in spiritual well-being and attitudes toward death due to taking a Hospice Subject in Nursing Students This is a comparative study design in which 31 senior nursing students of taking a hospice care subject and 27 senior nursing students of not taking a hospice care subject in college of nursing K university, that is located B metropolitan city in Korea. The instruments for spiritual well-being measuring tools was Kim's (2006) revision and complement of the translation by Choe (1990) on the basis of the spiritual well-being scale developed by Paloutzian and Ellison (1983). The instruments for attitudes toward death was researches revision and complement of the translation by Kim(1992) on the basis of the attitudes toward death Measuring Tool developed by Thorson and Powell (1988). Data were collected from June 1 through June 30, 2006; the researcher got permission from the subjcts, explained objectives of the research to subjects personally and got their permission, and distributed structured questionnaires to make a response in a self-administered basis. For data analysis, an SPSS WINDOWS 12.0 program was used for frequency, percentage, the mean, standard deviation, the minimum, the maximum, x2-test, ANCOVA, and Pearson's correlation coefficients. The main results of this research are as follows: 1. There were no differecnces the degree of spiritual well-being and the degree of attitudes toward death between nursing students who took a hospice subject and nursing students who did not take a hospice Subject, except several items of attitudes toward death. There was significant positive correlation (r= .508, p= .000) between subjects spiritual well-being and attitudes toward death. That is, the higher spiritual well-being, the more positive attitudes toward death. In conclusion, although there were no differecnces spiritual well-being and attitudes toward death between nursing students who took a hospice care subject and nursing students who did not take a hospice care subject, in nursing students, spiritual well-being was relatively high and their attitudes toward death was relatively positive. To help a nursing students make a positive change in attitudes toward death, a nursing intervention program is necessary to improve spiritual well-being.

• 대한인간공학회지
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• 제35권4호
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• pp.263-275
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• 2016

Objective: This paper introduces the regulatory oversight approaches and issues to consider in the course of safety culture oversight model development in the nuclear field. Common understanding on regulatory oversight and present practices of international communities are briefly reviewed. The nuclear safety culture oversight model of Korea is explained focusing on the development of safety culture definition and components, and their basic meanings. Oversight components are identified to represent the multiple human and organizational elements which can affect and reinforce elements of defense in depth system for nuclear safety. Result of validation study on safety culture components is briefly introduced too. Finally, the results of the application of the model are presented to show its effectiveness and feasibility. Background: The oversight of nuclear licensee's safety culture has been an important regulatory issue in the international community of nuclear safety regulation. Concurrent with the significant events that started to occur in the early 2000s and that had implications about safety culture of the operating organizations, it has been natural for regulators to pay attention to appropriate methods and even philosophy for intervening the licensee's safety culture. Although safety culture has been emphasized for last 30 years as a prerequisite to ensure high level of nuclear safety, it has not been of regulatory scope and has a unique dilemma between external oversight and the voluntary nature of culture. Safety culture oversight is a new regulatory challenge that needs to be approached taking into consideration of the uncontrollable aspects of cultural changes and the impacts on licensee's safety culture. Although researchers and industrial practitioners still struggle with measuring, evaluating, managing and changing safety culture, it was recognized that efforts to observe and influence licensees' safety culture should not be delayed. Method: Safety culture components which regulatory oversight will have to focus on are developed by benchmarking the concept of physical barriers and introducing the defense in depth philosophy into organizational system. Therefore, this paper begins with review of international regulatory oversight approaches and issues associated with the regulatory oversight of safety culture, followed by the development of oversight model. The validity of the model was verified by statistical analysis with the survey result obtained from survey administration to NPP employees in Korea. The developed safety culture oversight model and components were used in the "safety culture inspection" activities of the Korean regulatory body. Results: The developed safety culture model was confirmed to be valid in terms of content, construct and criterion validity. And the actual applicability in the nuclear operating organization was verified after series of pilot "safety culture inspection" activities. Conclusion: The application of the nuclear safety culture oversight model to operating organization of NPPs showed promising results for regulatory tools required for the organizations to improve their safety culture. Application: The developed oversight model and components might be used in the inspection activities and regulatory oversight of NPP operating organization's safety culture.