• 대한공간정보학회지
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• 제5권2호
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• pp.55-63
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• 1997

문화재에 대한 정밀 수치자료의 획득과 공간분석 체계의 구축은 대상물의 보존 차원에서 매우 중요한 의미를 지니고 있다. 본 연구는 문화재즐 보다 효율적으로 관리하기 위한 기하학적 수치자료의 획득과 이의 정량적 공간분석에 관한 것이다. 공주 무령왕릉 군에 대한 동일좌표계 상에서의 3차원 정밀 실측과 영상해석을 실시하여 수치자료의 기반을 구축하고 다양한 기하학적 분석은 물론 3차원 모니터링을 수행하므로서 보존대책의 기초자료를 제공할 수 있었다.

• 대한조선학회논문집
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• 제34권3호
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• pp.85-95
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• 1997

그동안 축적된 기술을 활용하여 차세대 "300인승 초고속 수중익 쌍동여객선"의 설계에 대한 연구를 수행하였으며 연구 수행이 극히 성공적으로 완료되어 모형시험을 통하여 확인된 성능은 설계목표를 훨씬 능가하고 있다. 본 연구를 통하여 설계 완료된 "초고속 수중익 쌍동여객선"의 건조 및 시운전은 이미 완료되었으며 가까운 장래에 시운전 결과를 발표하고자 한다.

• 가족자원경영과 정책
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• 제19권1호
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• pp.163-180
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• 2015

The purpose of this study was to explore a typology of time allocation, investigate determinants of time allocation types, and analyze differences in time use satisfaction by the types of time use of the elderly. The data source for this research was the 2009 Time Use Survey conducted by the Korea National Statistical office (KNSO). The 4,699 time diaries (3,552 for weekday, 1,147 for Sunday) completed by the elderly over the age of 60 were analyzed using mean, standard deviation, chi-square, cluster analysis, ANOVA analysis, Duncan test, and multinomial logistic regression analysis. Time allocation of the elderly was classified into four types: personal care oriented, work oriented, leisure oriented, and balanced type. Gender, age, education, employment status, income, and the presence of spouse were identified as determinants for each type. According to the types of time allocation, time use satisfaction was different on week days.

• 가족자원경영과 정책
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• 제12권1호
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• pp.41-55
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• 2008

The purpose of this study was to clarify variables affecting time management practice and the relationship between the practice and academic achievement of middle school students. Questionnaires including a time management scale were used for this study and the survey data were taken from 352 middle school students in Seoul and Gyeonggi-do. The statistical methods for the analysis were frequency, percentage, average, t-test, ANOVA and Pearson's correlation. The variables affecting student time management were gender, their standard of living, parental educational level and parental occupation. Religion and residential area were indicated as variables affecting several subscales of time management but the academic year of student had no effect on student time management behavior. The relationship between time management and the academic achievement of middle school students was slightly positive. Developing programs for time management in the field of family resource management is also necessary.

• Journal of Electrical Engineering and Technology
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• 제1권4호
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• pp.461-465
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• 2006

This paper presents a useful and simple method to design the passive skimming system for homogeneous permanent magnets based on numerical optimization. To simulate the effects of manufacturing and assembling tolerances, the actual geometrical parameter of the magnet with a derivation is suggested. Then, the optimal design model oi a passive shim system is set up to correct the derivative of field homogeneity. The numbers, sizes and locations of the passive shims are optimized by the steepest descent algorithm combined with design sensitivity analysis. Two implementations show that the proposed method can achieve the required homogeneity of the field with the minimum quantity of ferromagnetics.

• 한국반도체및디스플레이장비학회:학술대회논문집
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• 한국반도체및디스플레이장비학회 2006년도 춘계학술대회
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• pp.194-197
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• 2006

Lead-free bismuth-layered perovskite ferroelectric europium-substituted $Bi_{4}Ti_{3}O_{12}(BTO)$ thin films have been successfully deposited on Pt/Ti/$SiO_2$/Si substrate by a sol-gel spin-coating process. $Bi(TMHD)_3,\;Eu(THMD)_3,\;Ti(OiPr)_4$ were used as the precursors, which were dissolved in 2-methoxyethanol. The thin films were annealed at various temperatures from $600^{\circ}\;to\;720^{\circ}C$ in oxygen ambient for 1 hr, which was followed by post-annealed for 1 hr after depositing a Pt electrode to enhance the electrical properties. X-ray diffraction (XRD) and scanning electron microscopy (SEM) were used to analyze the crystallinity and surface morphology of layered perovskite phase, respectively. The remanent polarization value of the BET thin films annealed at $720^{\circ}C\;was\;25.95{\mu}C/cm^2$ at an applied voltage of 5 V.

• The Journal of Korean Physical Therapy
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• 제12권2호
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• pp.49-55
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• 2000

The purpose of this study was to identify the characteristics oi gait patterns and to find the effects of the gait function on the P.N.F. pelvic pattern. The subjects of this study were 40 hemiplegic patients who either hospitalized in or out patients at department physical therapy, Tae-Bong hospital and Masan college health education center. The study on these patient were done from July 20.1999 through May 10,2000. Method of gait pattern assessment used ink foot print record. The results were as follows: 1. There were significiant difference in cadence and stride length(p<0.05). 2. There were significiant difference in gait velocity (p<0.05).

• Journal of Korean Neurosurgical Society
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• 제49권3호
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• pp.194-199
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• 2011

There is still debate over which method of the surgery is the most appropriate for the treatment of scaphocephalic infants. In addition, change in psychomotor development following these procedures is a very complex issue that has not yet been resolved. In this paper, the authors describe a surgical technique for immediate spontaneous shape correction of infantile scaphocephaly. There were significant differences between pre- and postoperative cephalic index. We also describe an improvement in the developmental quotient following surgery. Therefore, this expantile zigzag craniectomy should be recommended to correct for isolated sagittal craniosynostosis in infants.

• 가족자원경영과 정책
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• 제19권4호
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• pp.141-161
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• 2015

The purpose of this study was to explore the differences in time perspective by socio-demographic variables and to investigate the effect of time perspective on time management and life satisfaction for college students. Questionnaires including time perspective, time management, and life satisfaction scales were used for this study. The survey data from 382 college students were analyzed by frequency, percentage, mean, standard deviation, t-test, ANOVA, Duncan test, Pearson's correlation analysis, and stepwise regression. The time perspective, composed of four factors future insensibility and present, past, and future orientation, differed according to the sex, academic grade, and specialty of the college students. The time perspective of the college students and the socioeconomic status of their households were investigated as effective variables on time management and life satisfaction. Based on these results, the implications for research and policy on the time perspective of college students were discussed.

• 한국분말재료학회지
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• 제10권3호
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• pp.168-171
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• 2003

Interpenetrating phase composites of $TiB_2$-Cu system were produced via Spark-Plasma Sintering (SPS) oi nanocomposite powders. Under simultaneous action of pressure, temperature and electric current titanium diboride nanoparticles distributed in copper matrix move, agglomerate and form a fine-grained skeleton. Increasing SPS-temperature and he]ding time promote densification due to local melting of copper matrix When copper melting is avoided the compacts contain 17-20% porosity but titanium diboride skeleton is still formed representing the feature of SPS . High degree of densification and formation of titanium diboride network result in increased hardness of high-temperature SPS-compacts.