• Title/Summary/Keyword: movements

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Reflex Eye Movements Induced by Stimulation of the Semicircular Canal Nerve in Rabbits (가토반규관신경자극(家兎半規管神經刺戟)에 의(依)한 반사성안구운동기전(反射性眼球運動機轉)에 관(關)하여)

  • Kim, Ki-Ho
    • The Korean Journal of Physiology
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    • v.2 no.2
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    • pp.75-81
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    • 1968
  • According to recent observations of Cohen et al. the patterns of vestibular eye movements of rabbits are different from those of cats. However, the causes of such difference of the reflex eye movements in these species are not wholly explained. While the accumulated data obtained from cats appear to be established, experimental evidences in rabbits are rather meager. The author had re-examined the reflex eye movements of rabbits and attempted to find a mechanism which causes such difference in the reflex eye movements between two species. In anesthesized rabbit, unilateral individual semicircular canal nerve was stimulated selectively with a fine insulated electrode which was inserted through a hole made on the corresponding osseous canal, under a dissecting microscope. When an individual canal nerve was stimulated, the reflex movements of both eyes were observed, photographed, and recorded kymographically. Extraocular muscles were also studied to find their morphological characteristics and to correlate them with the function of the muscles. 1. At the beginning of the stimulation, both eyes moved to a specific direction depending upon the canal stimulated, and such directional eye movements were sustained during the whole course of stimulation. Amplitude of the eye movement showed graded responses to the increasing frequency of the stimulus, reaching to the maximal response at 200-300 cps. 2. Stimulation of the unilateral horizontal canal nerve caused conjugate eye movements, which was also observed in cats and other species by other investigators. 3. Stimulation of the unilateral vertical canal nerve caused a pattern of non-conjugate eye movements, which are different from those observed in cats. Such different patterns of vestibular eye movements in two different species are ascribable to the functional difference of the inferior and superior oblique muscles.

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Towards the Spatiality of Social Movements: Exploring Geographical Contributions to the Study of Social Movements (사회운동의 공간성: 사회운동연구에 있어서 지리학적 기여에 대한 탐색)

  • Jung Hyun-Joo
    • Journal of the Korean Geographical Society
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    • v.41 no.4 s.115
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    • pp.470-490
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    • 2006
  • The paper critically examines resource mobilization theories, frame theory, and new social movement theories, and proposes studies on the spatiality of the social movements as one potential to mitigate the limitation in these theories. The resource mobilization theories and the frame theory, the strategy-oriented approaches, lack contextual understandings of the origin of social movements. While new social movement theories provide macro-scale analysis and the structural explanations of the origins of social movements, they have covered limited geographical areas. The spatiality of social movements promotes deep understandings of local differences, and contexts in and through which grievances are constructed and collective actions are organized. Physical structures and symbolic representations of places are often created and utilized as social movement strategies. The spatiality of social movements can be a useful conceptual tool to explain the diversity and the dynamics of social movements.

Vision-based recognition of a simple non-verbal intent representation by head movements (고개운동에 의한 단순 비언어 의사표현의 비전인식)

  • Yu, Gi-Ho;No, Deok-Su;Lee, Seong-Cheol
    • Journal of the Ergonomics Society of Korea
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    • v.19 no.1
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    • pp.91-100
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    • 2000
  • In this paper the intent recognition system which recognizes the human's head movements as a simple non-verbal intent representation is presented. The system recognizes five basic intent representations. i.e., strong/weak affirmation. strong/weak negation, and ambiguity by image processing of nodding or shaking movements of head. The vision system for tracking the head movements is composed of CCD camera, image processing board and personal computer. The modified template matching method which replaces the reference image with the searched target image in the previous step is used for the robust tracking of the head movements. For the improvement of the processing speed, the searching is performed in the pyramid representation of the original image. By inspecting the variance of the head movement trajectories. we can recognizes the two basic intent representations - affirmation and negation. Also, by focusing the speed of the head movements, we can see the possibility which recognizes the strength of the intent representation.

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A Study on the Analysis of the Foot Surface Area Development Figure by Foot Types and Movements (발의 유형과 동작에 의한 체표면 형태 분석에 관한 연구)

  • 문명옥;권영숙
    • Journal of the Korean Society of Costume
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    • v.24
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    • pp.235-251
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    • 1995
  • The purpose of this study is to analyze the charateristics of foot according to foot type and analyze the change of foot shape by movements for the sake of making a comfort-able footwears. On the 6 foot type classified by F.I. and F. P. A, this study analyze the surface areas and circumference in the surface area development figure. There are selected eighteen college girls and four movements. The results are as followes : 1. In the 6 foot types classified by F.I. and F. P. A., the circumferences were differed sig-nificantly. 2. In the 6 foot types classified by F.I. and F. P. A., the surface areas were not differed siginificantly. 3. By movements, circumferences and surfaces were not significantly changed according foot type. 4. By movements, the circumference IV, V were changed variously. 5. By movements, surface area of toes, M.P. joint and ankle were changed variously.

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A Study on development process and Union movements of Korea's Union. (한국 노동조합의 발전과정과 노동운동에 관한 연구)

  • 채규옥;한기수
    • Journal of Korean Society of Industrial and Systems Engineering
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    • v.18 no.33
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    • pp.185-197
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    • 1995
  • Labor union movements brought wage workers into being in the process of industrialization after the Industrial Revolution and they were started with efforts to solve a variety of special problems, brought up in the industrial society by systematic activities. Labor union shows us many differences in the direction of the movement according to its philosophical tendency. Objective of this study is as follows : To find out the problems of labor union movements for democratization of management to present the direction of labor movements based on the democracy of Industry. Accordingly chapter II examines on the Labor union literally for better understanding of the labor union movements Chapter III deals with the structure, characteristic and development process of our country's labor union chronologically. And on the basis of the development process chapter IV suggests the roles on the union, management and government for better union movements. Chapter V reaches a conclusion.

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A Process Algebra for Modeling Secure Movements of Distributed Mobile Processes (분산 이동 프로세스 이동의 안전성 모델링을 위한 프로세스 대수)

  • Choe, Yeongbok;Lee, Moonkun
    • Journal of KIISE
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    • v.43 no.3
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    • pp.314-326
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    • 2016
  • Some process algebras were applied to enterprise business modelling for formal specification and verification. ${\pi}$-calculus and mobile ambient can be considered for the distributed and mobile, especially to represent the movements of distributed real-time business processes. However there are some limitations to model the movements: 1) ${\pi}$-calculus passes the name of port for indirect movements, and 2) mobile ambient uses ambient to synchronize asynchronous movements forcefully. As a solution to the limitations, this paper presents a new process algebra, called ${\delta}$-calculus, to specify direct and synchronous movements of business processes over geo-temporal space. Any violation of safety or security of the systems caused by the movements can be indicated by the properties of the movements: synchrony, priority and deadline. A tool, called SAVE, was developed on ADOxx metamodelling platform to demonstrate the concept.

Relationship between Crack Propagation Depth and Crack Width Movement in Continuously Reinforced Concrete Slab Systems (연속철근 콘크리트 슬래브 시스템의 균열진전 깊이와 균열폭 거동 관계 분석)

  • Cho, Young Kyo;Kim, Seong-Min;Oh, Han Jin;Choi, Lyn;Seok, Jong Hwan
    • International Journal of Highway Engineering
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    • v.17 no.1
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    • pp.83-90
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    • 2015
  • PURPOSES : The purpose of this study is to investigate the relationship between the crack propagation depth through a slab and crack width movement in continuously reinforced concrete slab systems (CRCSs). METHODS : The crack width movements in continuously reinforced concrete pavement (CRCP) and continuously reinforced concrete railway track (CRCT) were measured in the field for different crack spacings. In addition, the crack width movements in both CRCP and CRCT were simulated using finite element models of CRCP and CRCT. The crack width movements, depending on the unit temperature change, were obtained from both the field tests and numerical analysis models. RESULTS : The experimental analysis results show that the magnitudes of the crack width movements in CRCSs were related to not only the crack spacing, but also the crack propagation depth. In CRCP, the magnitudes of the crack width movements were more closely related to the crack propagation depths. In CRCT, the crack width movements were similar for different cracks since most were through cracks. If the numerical analysis was performed to predict the crack width movements by assuming that the crack propagates completely through the slab depth, the predicted crack width movements were similar to the actual ones in CRCT, but those may be overestimated in CRCP. CONCLUSIONS : The magnitudes of the crack width movements in CRCSs were mainly affected by the crack propagation depths through the slabs.

The Effects of Pelvic Movements-based Training on Trunk Stability and Balance during Sitting in Children with Spastic Cerebral Palsy (경직성 뇌성마비아의 골반 움직임 기반 훈련이 앉은 자세에서 몸통 안정성과 균형에 미치는 영향)

  • Seo, Hye-Jung
    • Journal of the Korean Society of Physical Medicine
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    • v.12 no.2
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    • pp.103-111
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    • 2017
  • PURPOSE: This study was aimed to investigate the effects of pelvic movements-based training on trunk stability and balance during sitting in children with spastic cerebral palsy. METHODS: Ten children with spastic cerebral palsy were matched to an intervention (n=5) or control group (n=5). The intervention consisted of two weeks of pelvic movements-based training, five times a week. All participants were evaluated before, during, and after pelvic movements-based training using a trunk impairment scale (TIS) for trunk stability and a modified functional reaching test for balance during sitting. The collected data were analyzed using Repeated Measures ANOVA and the Mann-Whitney U test. RESULTS: The results of this study were as follows: 1) Significant increases in the TIS score (only dynamic balance) and forward reaching were observed in the experimental group, compared with the control group, after training (P<.05). 2) There were statistically significant time-factor increases within and between the subject' effects, in the TIS score (dynamic balance and total), dominant side, non-dominant side, and forward reaching (P<.05). CONCLUSION: In conclusion, this study showed that for children with spastic cerebral palsy, pelvic movements-based training improves trunk stability and balance during sitting. Further studies will be required to determine the long-term effects of pelvic movements-based training.

Exploration of Figurative Characteristics of Hand-Foot Coordination Movements - With Emphasis on Ballet and Korean Dance - (수족상응(手足相應) 동작의 형태학적 특징 탐색 - 발레와 한국무용을 중심으로 -)

  • Hwang, Kyu Ja;Yoo, Ji Young
    • (The) Research of the performance art and culture
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    • no.20
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    • pp.339-367
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    • 2010
  • Despite that it is relatively difficult to compare the movements in eastern and western dancing, this study approached hand-foot coordination movements, which involve lifting both an arm and a leg to stand on one foot, from a figurative point of view. In ballet, arabesque, developpe, and attitude were recognized as the example hand-foot coordination movements, and in Korean Dance, Oesawi, Gyeopsawi, and Meongseokmari of Mask Dance were classified into the hand-foot coordination movements. The figurative characteristics of these dances were approached from the aspects of racial traits, philosophies of dancing, and forms of movements. The following summarizes the findings about hand-foot coordination movements of this study. First, in relation to human physiology, eastern and western races have different traits. The forms of dancing have developed differently according to the builds and figures of dancers. Ballet is an elegant form of dancing using long legs and arms and its arabesque, developpe, and attitude movements emphasize stretching the body for an elegant and beautiful presentation. On the other hand, Korea was an agricultural society and lived closer to the land. As its people developed petite figures, its dancing movements, especially the hand-foot coordination movements, involved 'twisting' and 'walking down and up.' Second, despite that the hand-foot coordination movements are identical for east and west, ballet aims at the heaven and Korean Dance aims at the land according to the differences in the views of nature. Although the principle of hand-foot coordination movements is about aiming at the land, western philosophies and aesthetics pursue the heaven. Third, in ballet, the focus of beauty is the presentation of beautiful movements. Therefore, the hand-foot coordination movements precisely control the position and angle of arms and legs for the perfect balance of the body. On the other hand, the hand-foot coordination movements of Korean Dance are mostly rooted from natural daily movements and movements that enhance the efficiency of labor. Therefore, it is considered beautiful techniques even if the body looks rather unbalanced.

A Study In Movement of Wheeled Mobile Robot Via Sensor Fusion (센서융합에 의한 이동로봇의 주행성 연구)

  • Shin, Hui-Seok;Hong, Suk-Kyo;Chwa, Dong-Kyoung
    • Proceedings of the KIEE Conference
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    • 2005.10b
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    • pp.584-586
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    • 2005
  • In this paper, low cost inertial sensor and compass were used instead of encoder for localization of mobile robot. Movements by encoder, movements by inertial sensor and movements by complementary filter with inertial sensor and compass were analyzed. Movement by complementary filter was worse than by only inertial sensor because of imperfection of compass. For the complementary filter to show best movements, compass need to be compensated for position error.

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