• 대한물리치료과학회지
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• 제19권1호
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• pp.47-54
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• 2012

Purpose : This study is to know the effect on muscle activity when people use mouse aid or not in computer working environment. Method : 11 people of both sex in their twentieth were tested. As a independent variable, the condition without mouse aid and the condition with movable mouse aid were selected, and as a dependent variable, MVC(%) on four muscles and inconvenience degree(RPE scale) on three body part(wrist, forearm, shoulder) were measured. Result : Analyzing the research, MVC(%) of extensor muscle of finger had notably higher muscle activity than other muscles, and there wasn't notable difference in muscle activity before and after using mouse aid. In case of using mouse aid, we tested by giving RPE questionnaire which segmentalized mental fatigue degree into hand, forearm, and shoulder, and resultingly, there wasn't notable differences perspectively. However, people felt less tiredness subjectively after they use the mouse aid. Conclusion : The usage of mouse aid seems to give comfort to computer users.

• Journal of applied mathematics & informatics
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• 제22권1_2호
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• pp.307-316
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• 2006

Incomplete LU factorization preconditioning techniques often have difficulty on indefinite sparse matrices. We present hybrid reordering strategies to deal with such matrices, which include new diagonal reorderings that are in conjunction with a symmetric nondecreasing degree algorithm. We first use the diagonal reorderings to efficiently search for entries of single element rows and columns and/or the maximum absolute value to be placed on the diagonal for computing a nonsymmetric permutation. To augment the effectiveness of the diagonal reorderings, a nondecreasing degree algorithm is applied to reduce the amount of fill-in during the ILU factorization. With the reordered matrices, we achieve a noticeable improvement in enhancing the stability of incomplete LU factorizations. Consequently, we reduce the convergence cost of the preconditioned Krylov subspace methods on solving the reordered indefinite matrices.

• 한국컴퓨터정보학회논문지
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• 제25권3호
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• pp.235-241
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• 2020

그 동안 프라이버시 역설 현상을 설명하기 위한 많은 노력에도 불구하고 기존 연구들은 상반된 결과들을 보고하였다. 일부 연구들은 프라이버시 염려와 자기노출 사이의 관련성을 발견한 반면, 다른 연구들은 그렇지 못했다. 본 연구는 SNS 환경에서 이러한 관련성에 영향을 미칠 잠재력이 있는 상황변수로 상호작용 프라이버시 컨트롤(주로 프렌드 리스트와 프라이버시 셋팅)의 역할을 검토한다. 이러한 이유는 사용자들이 상호작용 프라이버시 컨트롤을 사용하여 자신의 사회적 환경을 조성하기 때문에 이것의 사용정도에 따라 프라이버시 염려와 자기노출 사이의 관계가 영향을 받기 때문이다. 본 연구는 서베이 방법을 활용하였고, 위계적 다중회귀분석을 사용하여 상호작용 프라이버시 컨트롤 사용의 조절효과를 분석하였으며, 분석결과 상호작용 프라이버시 컨트롤 사용의 조절효과를 발견하였다. 따라서 상호작용 프라이버시 컨트롤의 사용은 SNS를 대상으로 프라이버시 역설 현상을 검토하는 연구에서 고려해야 하는 중요한 상황변수라고 할 수 있다.

• 한국정보과학회:학술대회논문집
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• 한국정보과학회 2003년도 봄 학술발표논문집 Vol.30 No.1 (B)
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• pp.52-54
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• 2003

Measurement is used to improve software process and to help calculating software quality. It makes software project to be control and help producing software. Measuring software scale becomes important target in software development. LOC is used to measure the size intentioned aspect and function point is used to measure the function intentioned aspect. This paper discusses measurement method using function point, which fullows proposed rule, and degree of GUI (Graphical User Interface) accesses achieved by applying this measurement to web page. Applying proposed rules to web pages (specially that use much GUI such as shopping mall or auction site), there is advantage that calculate site changes on numerical value by measuring GUI degree when do site administration or update.

• 대한산업공학회지
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• 제2권1호
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• pp.45-60
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• 1976

In this study, Multiple Factor Analysis was undertaken for the purpose of substituting General Vocational Aptitude tester for paper tests according to the standardized and partially modified norm, and compared and analyzed these aptitude tests YK Type Working Character test for a test battery. In this analysis, four basis aptitude cluster of AQE was utilized as aptitude cluster, the study for skill was carried out by the method of sampling electronic aptitude cluster in four basis ones, and the parts needed in the process of its analysis were investigated by means of Video-Tape Recording. This paper was performed with sample test by application of the inverse variation curve from learning theory and induced learning rate as a measure of the degree of proficient of technicians, and from the obtained results illustrated optimum newly-production plan of ability program and load program by the use of computer program.

• 대한가정학회지
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• 제42권1호
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• pp.181-195
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• 2004

The purpose of the study was to explore the degree of children's access to media and the relationship between the use of media and language development of Korean-Chinese bilingual children in Yanji, China. Questionnaires were answered by 258 4th graders and their parents. The results showed that the children had an access to a variety of media. The children's use of language(Korean/ Chinese) differed to the type of media： they had more access to Korean language in the use of newspapers/magazines, books, and radio, and to Chinese language in the use of computer. They had comparatively a balanced access to Korean/chinese language in the use of TV. Stepwise regression analyses revealed that the children's access to Chinese language in the use of media, proficiency of a parent's Chinese language, and a parent's affection were related to proficiency of the children's Chinese language. Implications are derived from the use of media in development of bilingualism.

• 한국멀티미디어학회논문지
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• 제20권6호
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• pp.927-934
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• 2017

As the technology of drone develops, the use of drone is increasing, In addition, the types of sensors that are inside of smart phones are becoming various and the accuracy is enhancing day by day. Various of researches are being progressed. Therefore, we need to control drone by using smart phone's sensors. In this paper, we propose the most suitable machine learning model that matches the gyro sensor data with drone's moving. First, we classified drone by it's moving of the gyro sensor value of 4 and 8 degree of freedom. After that, we made it to study machine learning. For the method of machine learning, we applied the One-Rule, Neural Network, Decision Tree, and Navie Bayesian. According to the result of experiment that we designated the value from gyro sensor as the attribute, we had the 97.3 percent of highest accuracy that came out from Naive Bayesian method using 2 attributes in 4 degree of freedom. On and the same, in 8 degree of freedom, Naive Bayesian method using 2 attributes showed the highest accuracy of 93.1 percent.

• The Journal of Advanced Prosthodontics
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• 제10권4호
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• pp.291-299
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• 2018

PURPOSE. To assess the degree of conversion (DC) and light irradiance delivered to light-cured and dual-cured cements by application of different light sources through various types of monolithic computer-aided design and computer-aided manufacturing (CAD/CAM) materials. MATERIALS AND METHODS. RelyX Ultimate Clicker light-cured and dual-cured resin cement specimens with 1.5-mm thicknesses (n=300, 10/group), were placed under four types of crystalline core structure (Vita Enamic, Vita Suprinity, GC Ceresmart, Degudent Prettau Anterior). The specimens were irradiated for 40 seconds with an LED Soft-Start or pulse-delay unit or 20 seconds with a QTH unit. DC ratios were determined by using Fourier transform infrared spectroscopy (FTIR) after curing the specimen at 1 day and 1 month. The data were analyzed using the Mann-Whitney U test (for paired comparison) and the Kruskal-Wallis H test (for multiple comparison), with a significance level of P<.05. RESULTS. DC values were the highest for RelyX Ultimate Clicker light-cure specimens polymerized with the LED Soft-Start unit. The combination of the Vita Suprinity disc and RelyX Ultimate Clicker dual-cure resin cement yielded significantly higher values at both timepoints with all light units (all, P<.05). CONCLUSION. Within the limitations of this study, we conclude that the DC of RelyX Ultimate Clicker dual-cure resin cement was improved significantly by the use of Vita Suprinity and the LED Soft-Start light unit. We strongly recommend the combined use of an LED light unit and dual-cure luting cement for monolithic ceramic restorations.

• 대한치과교정학회지
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• 제29권5호
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• pp.563-573
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• 1999

본 연구는 치아크기 측정시 버니어 캘리퍼스를 사용한 계측치와 석고모형을 촬영하여 컴퓨터를 사용한 계측치를 서로 비교함으로써 석고모형 분석시 컴퓨터 이용 가능성을 알아보고자 시행되었다. 치아밀집치열 특징을 지니며 모든 치아의 맹출이 완료된 상하악 20조의 석고 모형의 좌측 중절치부터 제 1대구치까지 12개의 치아를 대상으로 하여, 각 치아의 근원심폭경을 버니어 캘리퍼스와 컴퓨터를 이용하여 2주 간격으로 2회 측정하여 실험측정치를 얻은 다음, 측정에 이용된 석고모형을 근원심접촉점 부위에서 개개치아로 분리한 후, 마이크로미터를 이용하여 측정한 표준치와 비교분석하였다. 계측시 오차의 원인을 알아보기 위하여 상하악의 occlusogram을 얻어 각 치아의 접촉점 이탈유무 및 정도를 구하고, TARG (Torque Angulation Reference Guide)를 이용하여 각 치아의 근원심경사도를 계측한 결과 다음과 같은 결론을 얻었다. 1. 2회 측정에 대한 재현도 비교시 버니어 캘리퍼스를 사용한 경우 12 개 치아 중 3개의 치아에서 유의한 차이가 나타났으며 컴퓨터의 경우에는 1 개의 치아에서 차이가 나타났다. 2. 치아크기 계측의 정확도를 알아보기 위하여 표준치와 비교한 결과, 버니어 캘리퍼스를 사용한 경우 12개 중 3개의 치아에서 유의한 차이가 있었으며 컴퓨터의 경우에는 12 개 중 2 개의 치아에서 차이가 나타났다. 3. 버니어 캘리퍼스를 사용한 경우 상악 제 1 대구치는 표준치에 비해 크게, 하악 제 1 대구치는 표준치에 비해 작게 재는 경향을 보였으며 컴퓨터의 경우 상하 제 1 대구치 모두 표준치에 비해 크게 재는 경향을 보였다. 4. 버니어 캘리퍼스로 계측시에는 하악 제 1 대구치가 가장 큰 오차를 보였으며 치아별로 오차정도가 다양하게 나타난 반면, 컴퓨터의 경우 치아별 오차정도의 차이를 보이지 않았다. 5. 접촉점 이탈정도 및 치관의 근원심 경사도와 오차정도의 상관성을 살펴본 결과 버니어 캘리퍼스로 측정한 경우 유의한 상관관계를 보이지 않았으나 컴퓨터로 계측한 경우 약한 순상관관계를 보였다. 이상의 결과는 모형분석을 위한 치아크기 계측시 컴퓨터 이용이 가능함을 시사하였다.

• Journal of Nutrition and Health
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• 제29권6호
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• pp.651-660
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• 1996

The purpose of this study was to examine and analyze the degrees and the influence factors of job satisfaction of dietitians working in hospitals in relation to performance of duty in their works and to provide effective management of hospital dietitians for high quality health and food service in hospital. The questionaire was prepared with reference to the previous studies on job satisfaction of dietitians working in hospitals throughout the nation. 201 dietitians in the country were surveyed. The period of research was from January 20 to February 28, 1995. The results are as follows. 1) In regard to the degree of job satisfaction of hospital dietitians, they showed the highest degree of job satisfaction in the relationships with fellow dietitians followed by worth and self-confidence, aptitude and interests, relationships with cooks, job stability, degree of recognition of the dietitians competence, supervision of the superiors, degree of application of professional knowledge, work load, wage level, degree of recognition of the importance of duty, cooperative relationships with load, wage level, degree of recognition of the importance of duty, cooperative relationships with doctors, degree of performance of clinical work, the number of dietitians, the prromotion system, and welfare system in that order. On the other hand, they showed the highest dissatisfaction with food service facilities. 2) The influence factors on job satisfaction are as follows. (1) Wage factor : Shorter weekday working hours and higher bonuses make greaster job satisfaction (R2=0.3115). (2) Working condition factor : Larger number of monthly holidays(R2=0.5142), shorter weekday working hours(R2=0.1077), longer previous food service experience and computer utilization (R2=0.1432) make greater job satisfaction. (3) Welfare factor : Welfare system (R2=0.4132) and promotion system (R2=0.1624) have to do with computer utilization. Job stability has to do with marital status and computer utilization (R2=0.1165). consequently, those married dietitians who use computers show higher job satisfaction. (4) Human relationship factor : Smaller mumber of patients receiving food makes greater job satisfaction (R2=0.1334). (5) Superivision factor : Shorter weekday working hours and larger number of monthly holidays make greater job satisfaction (R2=0.1709). (6) Achievement factor : Marriage, larger number of dietitians(R2=9.2293), age, larger number of monthly holiday, higher monthly wages and computer utiliazation (R2=0.1088) make greater job satisfaction. (7) Speciality factor : Marriage, longer current hospital tenure, higher position and working in seoul(R2=0.1142) make higher job satisfaction. (8) Job inclination factor : working in general hospitals rather than in oriental hispitals, working in seoul(R2=0.1776) and better bonuses(R2=0.1078)make greater job satisfaction. As a result, the following is suggested for the job satisfaction of hospital dietitions on the basis of this study : hospital dietitians can achieve miximum job satisfaction through smooth relationships with coworkers, and the responsible managers should improve welfare and working conditions for the job satisfaction of hospital dietitians.