• 대한지리학회지
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• 제28권1호
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• pp.40-57
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• 1993

본 연구에서는 光州를 중심으로 발생하는 人口流動의 특성에 관하여 분석하였다. 이를 위하여 生殘準法에 의한 이동 및 주거지 이동의 永久的 移動과 고속버스여객의 이동 및 환자의 受診移動의 一時的 移動으로 구분하였다. 分析結果, 1986-1990년 광주시 전출입의 양상은 전남이 규모상 탁월하지만 移動空間이 전국적으로 확산되고 있음이 밝혀졌다. 그리고 1980-1985년 센서스의 생잔율법에 의한 純移動의 분석과 광주시 5개 洞의 표본조사 결과에서는 移動因子로서 敎育因子와 移住者의 距離認知가 중요한 因子로 작용한다는 사실이 판명되었다. 한편, 1日移動의 분석결과, 週末과 休日에는 방문이동이 많고 連休에는 일시적 귀환이동이 탁월하게 나타났다. 환자의 수진이동은 생활환경의 변화에 따라 큰 폭으로 증가하고 있으며, 이런 현상은 광양, 여천의 공업지역에서 현저하게 나타나고 있다.

• 지역연구
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• 제9권1호
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• pp.45-63
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• 1993

University enrollment has long been regarded as one of the major factors inducing population concentration in Seoul and the Capital Region of Korea. Consequently, since early 1980's increases in enrollment and new establishments of extention universities beyond the boundary of Seoul, has been promoted, while university enrollment quota in Seoul has been strictly controlled. The degree of actual population dispersal, however, resulting from such a university enrollment policy has not been empirically tested. This paper aims at: First, identifying the trend of population growth and evolution process of the university enrollment policy in the Capital Region; Second, comparing the degree of influence of university enrollment on population concetration factors; Third, measuring actual effect of the enrollment control on population dispersal out of Seoul and the Capital Region. Major findings are as follows: First, only a week correlation between population and university enrollment growth trends was found; Second, the relative degree of influence on population concentration in the Capital Region, were order, in the order of magnitude, the physical amenity factor, the socio-cultural amenity factor, the employment climate factor and the educational factor. Third, and most improtant, based on the comparison of spatial distribution of graduated high schools and current residence of the selected university students, the gap between the two distributions was revealed and the inter-regional student population movement was estimated. The result shows that in Seoul's case about one-half of and in Kyunggi Province's case about one-fifth of university enrollment size, contributes to population concentration into Seoul. Fourth, as to the universities outside of the Capital Region, little effect in the case of universities located within the commuting distance, and a little effect on population dispersal in the case of universities located beyond commuting distance, were found. In sum, it seems clear that university enrollment policy in the Capital Region, especially in Inchon/Kyunggi Province has not been effective on student population dispersal out of Seoul and the Capital Region. Therefore, it is strongly recommended that university enrollment policy be throughly re-examined from its goal to the implementation means.

• 농촌계획
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• 제5권1호
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• pp.35-44
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• 1999

The purpose of this study is to find the bi-polar adjectives for rural stream landscape evaluation by the semantic differential scale and to suggest the major determinants of visual preference in rural stream landscapes. For this, the bi-polar adjectives for rural stream landscape evaluation was found by the method of the reliability test, and the spatial image was analyzed by the factor analysis. The level of visual preference was measured by slide simulation test, and these data were analyzed by the multiple regression. The major findings of this study can be summarized as follows : 1) Of the bi-polar adjectives expressing psychological and physical characteristics, the hi-polar adjectives which demonstrated reliability and consistency run as follows : Bi-polar adjectives expressing psychological characteristics : 'calm-bustling', 'unfamiliar-familiar', 'still-active','depressing-brisk', 'discomfortable-comfortable', 'suppressed-free', 'lifeless-living', 'quiet-noisy', 'unpleasant-pleasant'. Bi-polar adjectives expressing physical characteristics : 'artificial-natural', 'narrow-wide', 'rocky-not rocky', 'desolate-fertile', 'dirty-clean', 'enclosed-open', 'flat-steep', 'not gravelly-gravelly', 'thicketed-not thicketed', 'not weedy-weedy'. 2) Two factors, the harmony and the movement, were derived from the factor analysis for the psychological variables. Three factors, the naturalness, the rock, and the vegetation, were derived from the factor analysis for the physical variables. 3) Rural stream landscape types were classified into four types by the multi-dimensional scaling method. Type III, IV obtained higher rank of visual preference and type I, II obtained lower. 4) For all types, the factors determining the level of visual preference were found to be the harmony, the naturalness, and the vegetation. The visual preference determinants of rural stream landscape need to be considered in improving or restoring the rural stream landscapes.

• 한국운동역학회지
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• 제28권4호
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• pp.199-205
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• 2018

Objective: The purpose of this study was to examine the effect of increase in barbell weight on closely related variable to the anterior cruciate ligament (ACL) injury which are knee joint kinematics, joint load, joint moment, and maximum load attainment point during snatch of the weight lifting. Method: The subjects of the study were 10 male Korean national weight lifting athletes (69 kg 5, 77 kg 5; age: $21.80{\pm}3.91yrs.$, height: $168.00{\pm}4.06cm$, weight: $75.00{\pm}4.02kg$, career: $7.8{\pm}3.99yrs.$, snatch records: $168{\pm}4.06kg$). The weight of the barbell during the snatch operation was set at 70%, 75% and 80% of the highest records for each subject studied. Results: The result obtained from the one-way repeated measure ANOVA are as follows: With increased barbell weight, the extension moment of the left knee joint was higher in the 80% condition than the 70% (p<.001). However, other variables were not statistically significant difference. According to the factor analysis of the variables related to maximum load attainment point of the ACL major injury variables, the first sub-factor was the internal shear force, the posterior shear force, the abduction moment, and the muscle activity of the VL. The second sub-factor was the extension moment of the knee joint, compressive force, adduction moment, and the third sub-factor was the muscle activity of BF. Conclusion: These results indicate that the possibility of ACL injury can be lowered when performing a stable snatch movement.

• 토지주택연구
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• 제14권1호
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• pp.47-66
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• 2023

본 연구에서는 MZ세대의 주거환경특성, 주거만족도, 주거소유의식 및 주거이동에 대한 이론적 고찰과 선행연구를 검토하고, 2020년 한국주거실태조사 자료를 중심으로 AMOS를 이용하여 구조방정식 모형을 분석한다. 주거환경특성 14개 항목을 3가지 요인으로 분석하여 주거만족도, 주거소유의식, 주거이동에 미치는 영향을 분석하였다. 본 연구의 실증분석 결과는 다음과 같이 요약된다. 첫째, MZ세대의 주거환경에서 14개 항목을 대상으로 주성분분석의 Varimax로 요인분석을 수행하였다. 14개 항목 중 주차시설 항목은 유효성을 저해하여 분석대상에서 제외되었으며, 그 결과 KMO는 0.925, Bartlett의 검사결과는 0.01 미만의 유의한 확률을 보여 요인분석 모형이 적합한 것으로 나타났다. 둘째, MZ세대의 구조방정식 분석 결과를 보면 주거환경특성의 잠재변수인 주변환경성은 통계적으로 유의하게 나타났으나 접근용이성, 이용편의성은 통계적으로 유의하지 않게 나타났다. 셋째, MZ세대와 같은 젊은 세대일수록 소비에 대한 욕구가 강하기 때문에 상업시설 접근용이성에 대한 만족도가 높을수록 주거보유의식은 유의하게 나타난 것으로 보인다. 넷째, MZ세대의 전반적인 주거만족도는 주거이동에는 유의하게 나타났지만 주거보유의식에는 유의하지 않게 나타났다. 이러한 결과에 따르면 MZ세대는 산업화세대, 베이비붐세대, X세대와 다른 주거환경특성의 차이가 나타나고 있고, 그 요인은 주거만족도와 주거보유의식 및 주거이동에 영향을 미치는 것으로 확인되었다. 주거실태조사의 주거환경특성 항목들을 시대의 흐름에 맞게 개선하고 보완해야 하고, 정부와 지방자치단체는 주거양극화를 줄이기 위하여 세대의 환경과 특성에 맞는 주택시장에 적극적으로 참여할 수 있도록 지원이 우선시 되어야 한다. 그리고 앞으로 코로나19와 같은 특수한 시간적 상황에서는 어떻게 영향을 미치며 차이가 나타나는지 주거관련 연구의 필요성이 있다는 시사점을 제공한다.

• Biotechnology and Bioprocess Engineering:BBE
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• 제9권6호
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• pp.495-499
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• 2004

The analyses of peak shapes in chromatography are useful in operating chroma­tographic system. The asymmetry and sharpness of a chromatographic peak are estimated by the reversed-phase adsorption of two standard peptides (angiotensin II bradykinin) on $C_{18}$ In this work, the average particle diameters of $C_{18}$ were 5 and 15 $\mu$m, while the pore sizes were 100 and 300 A. The composition of the mobile phase was $50/50\;vol.\;{\%}$ of a binary mixture of acetonitrile and water with $0.1\%$ TFA, and the particles were packed in a stainless column ($4.6{\times}150$ mm). The third and the fourth central movement were calculated from the chromatographic elution curves by moment analysis. The peak asymmetry was determined by two theoretical calculations: the asymmetry factor by elution peak analysis and skewness with moment analysis. The sharpness was estimated by the fourth central moment. In this work, the most acceptable skewness was calculated when the pore size was 300 A. The large excess was observed on small pore size.

• 한국의류학회지
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• 제32권4호
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• pp.562-572
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• 2008

This study is to understand the current situation of the Seoul Collection and suggest market oriented strategies in order to establish a more effective fashion market. Three elements-time, form, and, place-were defined to analyse the dynamics of the collection and two factors-customer/competitor oriented information and information interaction among participants-were employed to evaluate the Seoul collection toward market orientation. The data were collected from the collection participants via an in-depth interview. The identified major market factors were: 1. Time-In order to create a desirable market, the opening time of the Seoul Collection needs to be rescheduled in accordance with the openings of other countries. Also the time must be suitable to the buyer's movement. 2. Product-Products which did not meet the needs of the market and their unrealistically high prices were two main factors that hindered sales. 3. Place-Although the place was a vital factor to the success of the collection, the facility was not fully a suitable location for buyers to place orders. Additionally, the analyzed data indicated the low market-oriented Seoul collection. Vital to elevating the Seoul Collection to meet the global standard, therefore, more practical research and merchandise planning should be arranged in advance.

• 한국해양공학회:학술대회논문집
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• 한국해양공학회 2004년도 학술대회지
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• pp.178-182
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• 2004

To establish the design criteria for construction of the rubble mound on improved ground, two kinds of analyses for the soil deformation behavior and the slope stability were performed on various cases for rubble mounds, soft grounds and back fills with application of the finite element method and the Bishop simplified method. The horizontal displacements and settlements at the crest of rubble mounds were analyzed as a function of the safety factor of embankments. The analyzed result shows that the soil movement increases considerably when the safety factor of rubble mounds is lower than 1.3.

• 전기학회논문지
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• 제60권12호
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• pp.2246-2253
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• 2011

This paper presents the error correction method of magnetic position sensor using recursive least square method (RLSM) with forgetting factor. Magnetic position sensor is proposed for linear position detection of the linear motor which has tooth shape stator, consists of permanent magnet, iron core and linear hall sensor, and generates sine and cosine waveforms according to the movement of the mover of the linear motor. From the output of magnetic position sensor, the position of the linear motor can be detected using arc-tan function. But the variation of the air gap between magnetic position sensor and the stator and the error in manufacturing process can cause the variation in offset, phase and amplitude of the generated waveforms when the linear motor moves. These variations in sine and cosine waveforms are changed according to the current linear motor position, and it is very difficult to compensate the errors using constant value. In this paper, the generated sine and cosine waveforms from the magnetic position sensor are compensated on-line using the RLSM with forgetting factor. And the speed observer is introduced to reduce the effect of uncompensated harmonic component. The approaches are verified by some simulations and experiments.

• Biomaterials and Biomechanics in Bioengineering
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• 제2권4호
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• pp.237-248
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• 2015

"Dynamic stabilization" systems have been developed in recent years to treat degenerative disorders of the spinal column. In contrast to arthrodesis (fusion), the aim here is to conserve intervertebral mobility to maximize comfort. When developing innovative concepts, many mechanical tests need to be carried out in order to validate the different technological solutions. The present study focuses on the B Dyn$^{(R)}$ "dynamic stabilization" device (S14$^{(R)}$ Implants, Pessac, France), the aim being to optimize the choice of polymer material used for one of the implant's components. The device allows mobility but also limit the range of movement. The stiffness of the ring remains a key design factor, which has to be optimized. Phase one consisted of static tests on the implant, as a result of which a polyurethane (PU) was selected, material no.2 of the five elastomers tested. In phase two, dynamic tests were carried out. The fatigue resistance of the B Dyn$^{(R)}$ system was tested over five million cycles with the properties of the polymer elements being measured using dynamic mechanical analysis (DMA) after every million cycles. This analysis demonstrated changes in stiffness and in the damping factor which guided the choice of elastomer for the B Dyn$^{(R)}$ implant.