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Effect of Shoe Heel Height on Vastus Medialis and Vastus Lateralis Electromyographic Activity During Stair Ascending and Descending (신발 뒤굽 높이가 계단 올라가기 및 내려오기 동안 내측광근과 외측광근의 근 활성도에 미치는 영향)

  • Oh, Duck-Won;Kim, Suhn-Yeop
    • Physical Therapy Korea
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    • v.16 no.3
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    • pp.24-31
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    • 2009
  • This study aimed to investigate the effect of differing heel heights on the electromyographic (EMG) activity in vastus medialis (VM) and vastus lateralis (VL) during stair ascending and descending activities. A total of 26 healthy women volunteered to perform stair-ascending and stair-descending tasks with 3 heel heights: barefoot, 3 cm, and 7 cm. The EMG activities of the VM and VL were recorded during the tasks. During the stair ascending and descending tasks, the EMG activities of both VM and VL significantly changed with differing the heel heights (p<.05). Moreover, the EMG activities of VM and VL during the stair ascending task were significantly higher than the corresponding values during the stair-descending task (p<.05). However, there were no significant differences between the VM:VL EMG ratios for the 3 heel heights (p>.05). The VM:VL EMG ratios between the 2 tasks differed significantly in the 7 cm high heel condition (p<.05). Despite an increase in the EMG activities in both VM and VL during stair ascending and descending tasks, there was no change in the relative EMG intensities of VM and VL, which was measured by calculating the VM:VL ratio this result indicates that no VM:VL imbalances were elicited. The relative EMG intensities of VM and VL during stair descent were lower than the corresponding values during the ascent, suggesting that VM and VL may show an imbalance in the eccentric activation during the weight-acceptance phase. This study provides useful information that will facilitate future research on how heel height affects muscle activity around the knee joint.

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The effects of sports on the General Features of low back pain (운동이 요통의 일반적 특성에 미치는 영향)

  • Kim Dong-Dae;Han Dong-Uck
    • The Journal of Korean Physical Therapy
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    • v.15 no.1
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    • pp.185-195
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    • 2003
  • This study was performed to investigate the effects on the general features of low back pain. The study subjects were low back pain patients treated with physical therapy at general hospitals located in Gyeonggi-do from August 2, 2000 to September 10. Total number of distributed questionnaires were 300, and 281 questionnaires were collected and analysed finally. The results were follows: 1. 76.3$\%$ of male answers that participate in sports, 60.6$\%$ of female answers that participate in sports and there are significant differences of two group(p < 0.01). 2. In case of male, preferential sports were running, tennis, golf, the others, but in case of female, preferential sports were walking, ascent of a mountain, swimming(p < 0.01). 3. In case of male, the most frequency preferred to participate in sports by patients was 30minutes daily, but in case of female, 3 times a week(p < 0.05). 4. The onset time of low back pain was 28.3$\%$ in the morning, 23.7$\%$ in the afternoon, 23.2$\%$ in motion according. 5. The onset conditions of low back pain was 48.5% during exercise, 44.4$\%$ after exercise. 6. Regardless of gender, low back pain patients want to go to a hospital for treatment. Otherwise, male preferred conventional treatment than a hospital, but female preferred a hospital than conventional treatment(p < 0.05). 7. Regardless of gender, 97.5$\%$ of patients is answered that the most preferential treatment method was physical therapy, 8. 92.2$\%$ of patients is answered that physical therapy was effective.

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Ball movements in various surface angles of uphill putting based on different ball positions (오르막 퍼팅 동작 시 볼의 위치가 퍼터와 볼의 움직임에 미치는 영향)

  • Ryu, Jong-Wook;Kim, Jai-Jeong
    • Journal of the Korean Applied Science and Technology
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    • v.36 no.2
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    • pp.448-455
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    • 2019
  • This study aims to discover whether there are other factors, such as the ball position and address that will increase the percentage of holed putts from different angles of surface. In this study, we selected five male tour professional golfers that has been of 15 years or longer on the Korea Golf Association. As a research tool, after installing a video camera at an artificial site that's similar with the real green, and with the player's own putter, motion analysis was carried out using a Titleist V1x, which is commonly used by golfers. We use SPSS programs, significance level a=.05. According to the ball movement during the ball movement during the ball position putt by section, it is confirmed that the ball speed and angular velocity increase as the ball position changes from left to right. If the uphill putt, ball movement was found to be increased same change flat putt and There is no significance deviation. In this study, we investigate how the clubface and ball move during impact by varying the position of the address ball according to the slope during the ascent putt, which should increase the success rate among the various slopes. This study was conducted to present scientific data.

The Influence of Disability Discrimination on Job Satisfaction of Wage Earners with Disabilities - Focused on the Multiple Mediating Effect of Mental Health - (임금근로장애인의 차별경험이 직무만족도에 미치는 영향 -정신건강의 다중매개효과를 중심으로-)

  • Song, Jin Yeong;Ryu, Kwang Soo
    • 재활복지
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    • v.18 no.4
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    • pp.119-144
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    • 2014
  • The purpose of this study was to ascertain the multiple mediating effect of mental health, which is composed of depression, disability acceptance, social-economic position, life satisfaction, on the relationship between disability discrimination and job satisfaction against wage earners with disabilities. A data of 992 wage earners with disabilities which derived from the fourth wave panel data provided at Korea Employment Agency for the Disabled were utilized. SPSS 20.0 and SPSS Indirect macro was conducted, and the results were verified by SPSS 20.0 and SPSS Indirect macro. The results were as follows : (1) Depression influenced between disability discrimination and job satisfaction directly or indirectly. (2) Disability acceptance mediated between disability discrimination and job satisfaction. (3) Social-economic position mediated between disability discrimination and job satisfaction. (4) Life satisfaction mediated between disability discrimination and job satisfaction. Based on the results, Based on the results, it suggested some methods of ascent of job satisfaction for wage earners with disabilities.

Thermal Buckling Characteristics for Thermal Protection System Panel Using Ritz Method (리츠 법을 이용한 열방어 시스템 패널의 열 좌굴 특성 연구)

  • Lee, Heesoo;Kim, Yongha;Park, Jungsun
    • Journal of Aerospace System Engineering
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    • v.13 no.1
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    • pp.18-28
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    • 2019
  • High speed vehicles are subjected to high thermal loadings due to aerodynamic heating during ascent and reentry. Since a thermal protection system panel is mechanically constrained, it may cause thermal buckling under excessive thermal loadings. The thermal buckling could disturb the field of flow and make aerodynamic characteristics unstable. It is thus necessary to design the thermal protection system panel to prevent thermal buckling. This study defines the analytical model of temperature distribution using the finite difference method for the thermal protection system panel with large temperature differences inside and outside. This paper proposes the approximate model of the thermal buckling characteristics for the thermal protection system panel through the use of the Ritz method. The validity of the present method was verified by comparing the results of the finite element analysis. Furthermore, this research performs the parametric analysis of the thermal buckling characteristics for the thermal protection system panel by using the approximate model.

Numerical Prediction of Acoustic Load Around a Hammerhead Launch Vehicle at Transonic Speed (해머헤드 발사체의 천음속 음향하중 수치해석)

  • Choi, Injeong;Lee, Soogab
    • Journal of the Korean Society for Aeronautical & Space Sciences
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    • v.49 no.1
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    • pp.41-52
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    • 2021
  • During atmospheric ascent of a launch vehicle, airborne acoustic loads act on the vehicle and its effect becomes pronounced at transonic speed. In the present study, acoustic loads acting on a hammerhead launch vehicle at a transonic speed have been analyzed using ��-ω SST based IDDES and the results including mean Cp, Cprms, and PSD are compared to available wind-tunnel test data. Mesh dependency of IDDES results has been investigated and it has been concluded that with an appropriate turbulence scale-resolving computational mesh, the characteristic flow features around a transonic hammerhead launch vehicle such as separated shear flow at fairing shoulder and its reattachment on rear body as well as large pressure fluctuation in the region of separated flow behind the boat-tail can be predicted with reasonable accuracy for engineering purposes.

Evaluation of the Antioxidant Efficacy of Padina boryana Extract from Maldivian Seaweed from Laccadive Sea Area (라카디브 해역 몰디브 자생 해조류 Padina boryana 추출물의 항산화 효능 평가)

  • Kim, Hyun-Soo;Wang, Lei;Jayawardena, Thilina U.;Lee, Jeong Min;Yim, Mi-Jin;Ko, Seok-Chun;Lee, Hyo-Geun;Je, Jun-Geon;Jeon, You-Jin;Lee, Dae-Sung
    • Korean Journal of Fisheries and Aquatic Sciences
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    • v.54 no.2
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    • pp.162-169
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    • 2021
  • Global warming has affected the distribution of organisms for decades and has displayed rapid ascent recently. Research into the effects on tropical organisms are vital. Padina boryana is a resourceful marine microalgae in the Maldives Sea in the Laccadive region. A 70% ethanol extraction (PBE) of this seaweed was used to investigate its antioxidant potential. Both in vitro and in vivo models were implemented. PBE exhibited protective potential against H2O2 induced apoptosis. ROS levels were suppressed due to PBE. PBE expressed a cytoprotective nature. In vivo experiments involving the zebra fish model conformed its validity. The antioxidant efficacy of PBE was dose dependent. Study outcomes suggest PBE has potential as a novel and valuable marine resource to aid the functional food and cosmeceutical industries.

A Study on the Similarity of Rising Structure of Tibetan Singing Bowl Chakra Arrangement and Chakra Lotus Mantra (티베트 싱잉볼 차크라 배열과 차크라연꽃 만트라의 상승 구조의 유사성 연구)

  • Hyun-Ju Kim;Geo-Ryong Lee
    • Journal of The Korean Society of Integrative Medicine
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    • v.11 no.1
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    • pp.43-51
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    • 2023
  • Purpose : This study suggests that the unique chakra arrangement of Tibetan singing bowls resembles the mantra of chakra lotus in the tantric tradition and the structure of chakra ascent, The two aim at the liberation of consciousness and confirm that they have a body, mind, and conscious healing mechanism. Methods : First, the structural characteristics of Tibetan singing bowls arrangement and chakra lotus mantra arrangement were investigated through the consideration of previous studies. Next, the healing mechanism of Tibetan singing bowls, which has been learned in Nepal, was examined through previous studies and literature to clarify that the rise of chakra in the two systems has a balance of body, mind, and consciousness and aims at liberation of consciousness. Results : The arrangement of Tibetan chakras is similar to the mantra of chakra lotus. Both have a structure in which the auxiliary sound of the previous chakra is interlocked with the structure of being the main sound of the next chakra to raise the chakra. At this time, the rise of the chakra is the liberation of consciousness by the ultimate purpose. Conclusion : Tibetan chakra are structurally similar to chakra lotus mantras and chakra ascents, as they have a theoretical background to tantric traditions. Chakra is the quality of inner consciousness that is conveyed to the outside and expressed in its own actions. Therefore, chakras should be well coordinated to lead our lives healthily. In this point, the chakra arrangement of Tibetan singing bowls is a system that exposes the inner balance to the outside and heals us more directly. Therefore, Tibetan singing bowls therapy has an integrated medical value in restoring our mind and body balance. Because chakras are dimensions of consciousness, the study of chakras is abstract or lacking, so more systematic and scientific study of chakras is needed.

Comparison of the Immediate Effects of the Assisting Method for Center of Body Weight on Vastus Medialis Oblique and Vastus Lateralis Muscle Activation Variables and Muscle Onset Time During Stair Ascending (체중심의 보조 방법에 따른 계단 오르기 시 안쪽넓은근과 가쪽넓은근의 근활성 변수들과 개시시간에 미치는 즉각적인 영향 비교)

  • Ji-Won Shin;Sam-Won Yoon
    • PNF and Movement
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    • v.21 no.1
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    • pp.107-117
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    • 2023
  • Purpose: The aim of this study is to compare the immediate effects of weight-assisting methods on vastus medialis oblique (VMO) and vastus lateralis (VL) muscle activation, on the VMO/VL muscle activation ratio, and on muscle onset time in healthy subjects when ascending stairs. Methods: Healthy participants were randomly assigned to the belt group (n = 11), hand group (n = 11), and control group (n = 11). In the belt group, a belt was wrapped around the sacrum and pulled forward with both hands, moving the center of weight forward, while ascending stairs. The hand group grasped the hips with both hands and climbed stairs, assisting their weight from the rear and moving the center of weight backward, and the control group climbed the stairs without any intervention. Results: Muscle activation of the VMO decreased significantly after the intervention in the belt and hand groups, and activation of the VL muscle in both groups showed a greater decrease than that of the VMO muscle. Further, the VMO/VL muscle activation ratio increased significantly, with an improvement shown in the order of the belt group, hand group, and control group, while muscle onset time also improved in the order of the belt group, hand group, and control group. Conclusion: The belt group demonstrated the greatest effect across all dependent variables, confirming that in clinical practice, these two weight-assisting methods are more effective interventions during stair ascent for patients with knee joint instability, pain, and imbalance than no assistance.

The Dramatization of Habitus: A Bourdieun Reading of Pygmalion

  • Hwang, Hoon-Sung
    • Journal of English Language & Literature
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    • v.55 no.3
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    • pp.383-398
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    • 2009
  • Based on the Greek myth of Pygmalion and the fairy tale of Cinderella, Shaw's Pygmalion demonstrates a masterful coalescence of these two narrative motifs into a coherent plot scheme. Even more significant is his keen insight into the conflicts created at the tripartite intersection of human activity concerning language/class/culture, which, as the leitmotif, revolves around lessons in language learning. This play basically deals with human transformation and by its very nature, Higgins's experimentation with transforming Eliza cannot stop at language alone. Her cultural transformation ripples over into the realms of gesture and even a unique way of living (modus vivendi) intimately associated with taste and manners, which Bourdieu terms as habitus. By acquiring a new fashion and language, Eliza is reborn as a new lady aspiring to be filled with a newly acquired habitus. While separating her from her old Cockney style, Higgins inculcates Queen's English in Eliza, in which process her changed speech styles gradually transforms and restructures her deportment and manners, finally generating new practices, perceptions and attitudes. The gist of Pygmalion is however less Eliza's ascent into the middle class than her battle for symbolic capital waged at the level of language. By problematizing his contemporary practice of habitus conventionalized and warped by class distinctions based on economic, social and cultural capitals, Shaw creates a new humanist model of man founded on spiritual and rational virtues. In conclusion, Eliza is not a frigid Galatea but a dynamic character that goes through a brilliant transformation of three stages: 1) linguistic; 2) cultural, and 3) humanist. Finally she is built into a "consort battleship" on an equal standing with her sculptor. The process of her character-building cannot be illuminated without resorting to the dynamic notion of habitus, which highlights the process of inculcation, structuring, generation and transposing. Given the overwhelming weight of the heroine's role and the dynamic process of her transformation as the major plot scheme, this play should be christened Galatea in lieu of Pygmalion.