• 제목/요약/키워드: Physical impact

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경량 바닥구조의 바닥충격음 저감량 실험실 측정방법 고찰 (Review of measurement of impact sound improvement for light-weight floor)

  • 장길수;정광용;김선우
    • 한국소음진동공학회:학술대회논문집
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    • 한국소음진동공학회 2002년도 추계학술대회논문집
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    • pp.950-955
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    • 2002
  • ISO 140-11 specifies a method for measuring the acoustic properties of floor coverings from the view-point of reducing impact sound transmission. This test method is limited to the specification of procedures for the physical measurement of sound originating from an artificial impact source under laboratory conditions. In this study, ISO 140-11 was reviewed to applicable to domestic floor coverings installed on lightweight floors.

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경량바닥구조의 바닥충격음 저감량 실험실 측정방법 고찰 (Review of measurement of impact sound improvement for light-weight floor)

  • Jang, Gil-Soo;Kim, Sun-Woo;Jung, Kwang-Yong
    • 한국소음진동공학회:학술대회논문집
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    • 한국소음진동공학회 2002년도 추계학술대회논문초록집
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    • pp.392.2-392
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    • 2002
  • ISO 140-11 specifies a method for measuring the acoustic properties of floor coverings from the view-point of reducing impact sound transmission. This test method is limited to the specification of procedures for the Physical measurement of sound originating from an artificial impact source under laboratory conditions. In this study, ISO 140-11 was reviewed to applicable to domestic floor coverings installed on lightweight floors.

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Sustainability Impact of Tall Buildings: Thinking Outside the Box!

  • Aminmansour, Abbas
    • 국제초고층학회논문집
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    • 제8권2호
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    • pp.155-160
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    • 2019
  • Applying the criteria regularly used in sustainability assessment of "ordinary" buildings leads to the observation that tall buildings are "not sustainable." But nothing is ordinary about tall buildings and such an evaluation is not appropriate. While tall buildings may not measure up to the same sustainability standards applied to not-tall buildings, they do indeed have a significant sustainability impact if assessed within their appropriate context. This paper promotes the idea that in evaluating "sustainability" of tall buildings, we must look at their sustainability impact beyond their physical boundaries and within the urban context.

Comparison of spatio-temporal gait parameters according to shoe types in chronic stroke survivors: a preliminary study

  • Hong, Soung Kyun;Park, Su Ho;Shin, Sung Ri;Lee, Dong Geon;Lee, Seung Hoo;Jung, Sun Hye;Pyo, Seung Hyeon;Lee, Kyeong-Bong;Lee, Gyu Chang
    • Physical Therapy Rehabilitation Science
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    • 제7권1호
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    • pp.23-28
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    • 2018
  • Objective: The purpose of this study was to investigate the impact of wearing various types of shoes on gait ability in stroke survivors and in order to gain information in regards to shoes that could possibly replace ankle orthosis. Design: Cross-sectional study. Methods: Eight hemiplegic survivors diagnosed with stroke participated in the study. Gait was analyzed using the GAITRite Electronic Walkway (CIR System Inc., USA) when subjects walked with no showed, walked with non-ankle-covered shoes, and walked with ankle-covered shoes. This study collected gait variables, including velocity, cadence, step length, stride length, single support time, and double support time, respectively. Results: In the comparison of walking with no shoes, non-ankle-covered shoes, and ankle-covered shoes, there were significant differences in gait velocity, step length, stride length, and the less affected side single support time (p<0.05). However, there were no significant differences in cadence, affected side single support time, and double support time. Conclusions: Ankle-covered shoes had a positive impact on the gait of stroke survivors. However, it is necessary to conduct more studies comparing various types of shoes with ankle orthoses.

윤축을 적용한 좌·우 주관절 신전 동작의 운동역학적 비교 연구 (Comparative Study of Biomechanical Left and Right Elbow Joint Extension Movements After Wheel Axle Application)

  • 김성주
    • 한국운동역학회지
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    • 제21권4호
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    • pp.429-436
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    • 2011
  • In this study, we have experimented with 9 players at the national delegate level. Although there were some differences in the average effects of 3 types of one-two straight movements after the application of wheel axle, there were no statistical differences in the case of surface reacting forces, electromyograms, and impact forces. When the right fist was impacted using the one-two straight movements and the wheel axle was applied with 3 segmentations, high impact forces were obtained for the pronation in the following order-72.01 $m/s^2$ (type 2), 70.93 $m/s^2$ (type 3), and 58.19 $m/s^2$ (type 1). Higher values of the surface reacting force were found for type 1 that did not exhibit pronation in the left foot, whereas in the case of the vertical direction of the right foot, type 2 with pronation exhibited higher values and impact forces. In the right electromyogram, high impact forces due to the activation of the muscular electric potential were obtained for lumbar erector (LE) spinae and triceps brachii (TB) with type 1; LE spina, latissimus dosi (LD), and upper trapezius (UT) with type 2; and brachioradialis (BR), UT, and rectus abdominal (RA) with type 3. Due to pronation and complex motions of the 3 pronation segmentations, the efficiency was higher for impacts due to one-two straight movements.

일부지역 노인의 구강건강영향지수 비교 연구 (A comparative study on the oral health impact profile in two urban area)

  • 김설희;박인숙
    • 한국치위생학회지
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    • 제9권2호
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    • pp.221-228
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    • 2009
  • The purpose of this study was to evaluate the impact of oral health impact profile in two urban area The respondents enrolled in this study were elderly people aged 65years from Gwang-ju city, Sunchon city. A total of 371 participants(Gwang-ju city 161, Sunchon city 210) analyzed. The contents of the research were social demographic characteristics, self perceived need for dental care, attributes related to denture, dental visiting pattern, the perceptions regarding dental health condition, and OHIP-14. 1. In the comparison Two urban area, the perceptions regarding dental health condition, self perceived need for dental care, dental visiting pattern was statistically significant difference(p<0.05). 2. Among the 7 OHIP-14 subscales, the mean scores of physical disability were significantly higher in two urban area(p<0.05). 3. The Social demographic characteristics, OHIP-14 represented a statistically significant difference related to gender, age and denture use(p<0.05). Through this research, Both Gwang-ju city and Sunchon city was found that elderly people was more negative impact of physical disability on oral health related quality of life. Therefore need to oral health program for improving oral health in the elderly people.

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Geometry effect in the drug delivery for therapy with nanomedicines based on the conditions of the sport

  • Zhu, Lemei;Zou, Xuemin;Li, Xi;Zhang, Yuan;Liu, Juan;Xiang, Yuhan
    • Advances in nano research
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    • 제13권3호
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    • pp.217-231
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    • 2022
  • This study investigates the geometrical impact on the nanomedicine drug delivery via nanodevices. A nanomotor made of the nanotube carrying the drug as the motor blade is considered in the blood flow. Physical activities change the blood flow, and sports training enhances the blood flow and plays a significant role in the stability of drug delivery devices. This paper studies the impact of geometrical parameters on the nanomotors carrying the nanomedicine. The effect of physical exercise on the dynamic response regarding the stability of drug delivery devices is discussed in detail.

Intellectual Capital and Corporate Sustainable Growth: The Indian Evidence

  • Mukherjee, Tutun;Sen, Som Sankar
    • Asian Journal of Business Environment
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    • 제9권2호
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    • pp.5-15
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    • 2019
  • Purpose - The present study endeavours to investigate the impact of intellectual capital (IC) and its components on corporate sustainable growth in India. In addition, this study aims to find out the most influential component of IC on corporate sustainable growth in India. Research design, data, and methodology - A sample size of top 139 NSE listed non-financial companies over a time period of five years has been used in this monograph. The impact of intellectual capital and its components on corporate sustainable growth has been examined using the longitudinal data analysis technique. Results - The findings of this study bring to light that intellectual capital (IC) as measured by the M-VAIC model demonstrates a significant impact on corporate sustainable growth. Considerably, the results also reveal that almost all the explanatory variables viz. Physical Capital, Relational Capital, Innovation Capital, and Process Capital exercise notable influence in explaining corporate sustainable growth. Moreover, the results demonstrate Innovation Capital (controlling the effect of Physical Capital) represents the most influential component of IC on corporate sustainable growth. Conclusions - The research findings show that in the Indian context, both physical capital, and IC (overall), as well as its components, play a crucial role to explain corporate sustainable growth.

Gender Differences of Vertical Drop Landing Strategies in College Students

  • Yi, Chung-Hwi;Park, So-Yeon;Yoo, Won-Gyu
    • 한국전문물리치료학회지
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    • 제11권4호
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    • pp.1-6
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    • 2004
  • The kinematics involved in different landing strategies may be related to the occurrence of trauma. Several sources suggest that the angle of knee extension on touchdown and impact with the ground determines the magnitude of the impact force and, indirectly, knee loading. This study compared the initial knee angle and maximum knee flexion angle at the instant of impact on drop-landings between healthy men and women. In this study, 60 participants (30 males, 30 females) dropped from a height of 43 cm. A digital camera and video motion analysis software were used to analyze the kinematic data. When landing, there was significant difference between the two groups ($15.67{\pm}6.05^{\circ}$ in male, $24.10{\pm}6.34^{\circ}$ in female) in the mean knee flexion angle. The range of knee flexion on landing ($44.06{\pm}10.97^{\circ}$ in male, $36.96{\pm}9.99^{\circ}$ in female) also differed significantly (p<.05). The greater knee flexion that was observed in the male subjects would be expected to decrease their risk of injury. Women land with smaller range of knee flexion than men and this might increase the likelihood of a knee injury.

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Numerical simulations of interactions between solitary waves and elastic seawalls on rubble mound breakwaters

  • Lou, Yun-Feng;Luo, Chuan;Jin, Xian-Long
    • Structural Engineering and Mechanics
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    • 제53권3호
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    • pp.393-410
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    • 2015
  • Two dimensional numerical models and physical models have been developed to study the highly nonlinear interactions between waves and breakwaters, but several of these models consider the effects of the structural dynamic responses and the shape of the breakwater axis on the wave pressures. In this study, a multi-material Arbitrary Lagrangian Eulerian (ALE) method is developed to simulate the nonlinear interactions between nonlinear waves and elastic seawalls on a coastal rubble mound breakwater, and is validated experimentally. In the experiment, a solitary wave is generated and used with a physical breakwater model. The wave impact is validated computationally using a breakwater - flume coupling model that replicates the physical model. The computational results, including those for the wave pressure and the water-on-deck, are in good agreement with the experimental results. A local breakwater model is used to discuss the effects of the structural dynamic response and different design parameters of the breakwater on wave loads, together with pressure distribution up the seawall. A large-scale breakwater model is used to numerically study the large-scale wave impact problem and the horizontal distribution of the wave pressures on the seawalls.