• Title/Summary/Keyword: 수평근

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Inhibitory Factors of Robinia pseudoacacia Distribution in a Pinus thunbergii Forest at the Coast (해안 곰솔림 내 아까시나무의 분포확대 억제요인)

  • Jung, Sung-Cheol;Koo, Kyo-Sang;Kim, Kyong-Ha
    • Korean Journal of Environment and Ecology
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    • v.25 no.5
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    • pp.717-724
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    • 2011
  • The objectives of this study were to analyze environment in the forest and growth characteristics for investigating the characteristics of Robinia pseudoacacia distribution in a Pinus thunbergii forest at the coast. As a result of analyzing inhibitory factors of Robinia pseudoacacia distribution in a Pinus thunbergii forest at the coast, it is considered that the salt level included in a sea wind is supposed to be the primary factor of the slow growth for Robinia pseudoacacia since brown leaves, wilting and early leaf fall have appeared in the 0m spot from the artificial dune which has the high salt level. However, the soil properties and light environment hardly have a effect on the growth of Robinia pseudoacacia because there is no difference among planting places. Also, the growth ring of the horizontal root in 2year individuals 0.1~0.2m away from the dune have been formed for 1 year only as a consequence of analyzing growth rings of Robinia pseudoacacia growing on the coast. It can be infered that the nourishment of the horizontal root from individuals growing on the coast have been provided for the first 1 year only. It is estimated that, in case of the nearby areas on the coast, it is not enough to provided nourishment to the horizontal root due to obstructing the growth of new individuals by a sea wind, so the growth of the horizontal root would be hampered. Therefore, it is considered that impedient Robinia pseudoacacia distribution in a Pinus thunbergii forest at the coast is caused by making no growth of new horizontal roots and newborn individuals.

Shear Strength of Reinforced High Strength Concrete Deep Beams with Geometric Condition (기하학적 경계조건을 고려한 고강도 철근 콘크리트 춤이 큰 보의 전단강도)

  • 오정근;신성우
    • Magazine of the Korea Concrete Institute
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    • v.10 no.1
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    • pp.109-118
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    • 1998
  • 전단거동에 의해 지배되는 고강도 철근콘크리트 춤이 큰 보의 전단역학적 거동 및 전단강도특성을 고려한 이론식을 제시하고자 소성이론에 근거한 극한해석에서 상계치정리를 이용하여 이론적 전개를 하였으며, 고강도 R/C춤이 큰 보의 전단응력에 영향을 미치는 콘크리트 압축강도, 수직전단보강근 및 수평잔단보강근의 보강효과를 고려한 이론식을 제시하였으며, 수평철근 즉 주인장철근 및 수평전단보강근의 장부작용을 고려하였다. 실험결과와 비교할 때 제안식은 수직잔단보강근의 전단보강효과를 과대평가하고있으며, 수평전단보강근의 효과를 적절하게 평가하고 있음을 나타내었다. 또 전단스팬비가 0.5, 0.85인 경우에는 제안식에 의한 값이 다소 낮게 나타내, 전단스팬비가 낮은 경우는 다소 과소평가하는 것으로 나타났다.

Comparison of Muscular Activity in Method with the Application of 3D Printer Maded Instrument Assistant Soft Tissue Mobilization(IASTM) Tools (3D 프린터로 제작된 도구를 이용한 연부조직가동술(IASTM) 적용방법에 따른 근활성도 비교)

  • Tae, Won-Kyu;Kang, Jong-Ho;Park, Tae-Sung
    • Journal of Convergence for Information Technology
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    • v.12 no.5
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    • pp.177-182
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    • 2022
  • This study aim to verify the difference in muscle activity due to difference in the direction of the stroking method for the stroke direction of the muscles using a tool made by a 3D printer. The subjects were conducted with 20 healthy adults in their 20s, and IASTM applied the intervention of the perpendicular stroking on the direction of muscle driving and intervention of the pararell stroking on the direction of muscle driving, with 10 each deployed. All subjects measured the muscle activity before intervention, and the muscle activity was measured and compared with the independent T test and the paired T test. The results of this study showed a significant increase in muscle activity in vertical groups, although the muscle activity in horizontal groups decreased. It was that differences in direction are significant in the application of IASTM.

Relationship between Temporomandibular Joint Disorders and Horizontal Morphology of Lateral Pterygoid Muscle (외측 익돌근의 수평적 형태와 측두하악관절장애 간의 상관성)

  • Jung, Jae-Kwang;Kwon, Choonik;Byun, Jin-Seok;Choi, Jae-Kap
    • Journal of Oral Medicine and Pain
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    • v.38 no.2
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    • pp.149-159
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    • 2013
  • The purpose of this study was to investigate the relationship between horizontal morphology of lateral pterygoid muscle and onset of temporomandibular joint disorders. Randomly selected 150 subjects, assigned with equal number in terms of gender and age group, were included. The axial and sagittal images in their magnetic resonance images of the temporomandibular joints were used to measure the morphologic characteristics of lateral pterygoid muscles and temporomandibular joints. The measurement variables were maximal horizontal width and insertion angle to the condyle, position of the articular disc, condylar deformity, and joint effusion. In addition, presence or absence of the temporomandibular joint pain was examined through history and palpation of the joints. The relationships among measurement variables were analyzed and the results were as follow. The insertion angle of the lateral pterygoid muscle to the condyle was higher in the joint of anterior disc displacement without reduction than that in the joint of normal disc position. In addition, the maximal horizontal width of the lateral pterygoid muscle was significantly increased in joints with pain than those without pain. Also, the insertion angle was significantly higher in younger age group and the maximal width was significantly greater in male than in female. These results suggest that high insertion angle of lateral pterygoid muscle might be an important anatomic predisposing factor for anterior disc displacement in temporomandibular joint and muscular activity of lateral pterygoid muscle might be affected by preauricular pain. In conclusion, there might be a bi-directional interaction between lateral pterygoid muscle and joint in the progression of anterior disc displacement in temporomandibular joint.

Manual Therapy of Musculoskeletal Diseases(Shoulder-Horizontal Adduction and Abduction) (근골격계 질환의 치료(어깨-수평모음과 벌림))

  • Kim, Do-Gwan;Sin, Seong-Yun;Lee, Hyeon-Chang;Lee, Yang-Won;Park, Gi-Hong
    • Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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    • 2016.05a
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    • pp.138-139
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    • 2016
  • This paper check over the shoulder disorder derived from musculoskeletal disorder. Particularly, it performing a manual measurement for horizontal adduction and horizontal abduction of shoulder. Here, if the value is lower than the reference value, It presents a reasonable manual therapies.

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Horizontal Stress Analysis of Electric Pole using Earth Pressure Cell from Mock-Up Tension Test (전주의 실물인장실험시 토압계를 이용한 수평토압분석)

  • Ahn, Tae-Bong
    • Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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    • v.24 no.8
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    • pp.62-69
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    • 2010
  • Many electric poles in the softground have been collapsed due to external load. In this study, 10 types of tests were performed with variation of location, numbers and depths of anchor blocks as well as depth of poles to find horizontal earth pressure through full scale pull-out tests. The horizontal earth pressure increased with embedded depth of electric pole, and earth pressure of lower passive zone decreased. The deeper of anchor block, earth pressure of passive zone becomes less. 4 anchor blocks decreased earth pressure at G.L.-0.9[m]. It is considered that 4 anchor blocks installed along 80[cm] vertically are main reason. Overall, when more anchor blocks are constructed, excavation area is large, and constructivity such as backfill is bad, therefore one anchor block would be preferred.

Horizontal Displacement Analysis of Electric Pole from Full Scale Pull-Out Test in Softground (연약지반에 시공된 전주의 실물인장실험을 통한 수평변위분석)

  • Ahn, Tae-Bong
    • Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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    • v.23 no.12
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    • pp.115-126
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    • 2009
  • Many electric poles in the softground have been collapsed due to external load such as typhoon wind load. In this study, the location, numbers and depths of acnchor blocks as well as depth of poles were varied to find horizontal displacement of poles through pull-out tests. The 10 types of tests were performed, and lateral displacements showed differences depending on location, numbers and depth of poles. The bending is generated in the upper part at the initial load, but it moved to central part as load increased. The maximum horizontal displacement decreased to 1/1.6 at -0.5[m] depth of anchor block and 1.3[m] additional laying depth of poles into ground. Two anchor blocks of poles are better than one acnchor block system, but one anchor block system is recommended because difference of displacement is not too large, and constructibilty is bad due to increase of excavation for anchor blocks.

Manual Therapy for Horizontal Adduction and Abduction (어깨의 수평 모음과 수평 벌림에 대한 치료)

  • Shin, Seong-Yoon;Lee, Hyun-Chang;Ahn, Woo-Young
    • Proceedings of the Korean Society of Computer Information Conference
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    • 2016.07a
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    • pp.99-100
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    • 2016
  • 본 논문에서는 근골격계 질환 중에서 가장 흔히 나타나는 어깨의 질환에 대하여 살펴보도록 한다. 특히 어깨를 옆으로 반드시 폈다가 안으로 오므리는 수평 벌림과 수평 모음에 대한 측정 방법을 살펴본다. 여기서 일정한 임계값보다 크게 나타나는 값인 통증 유발에는 반드시 도수 치료가 필요하다고 본다.

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