• Title/Summary/Keyword: gliding

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The Effects of Kinesio Taping on the Gait Pattern in Patients with Degenerative Arthritis (키네시오 테이핑이 퇴행성 슬관절염 환자의 보행패턴에 미치는 효과)

  • Son, Gil-Soo;Lee, Moon-Hwan;Lee, Soo-Yeon
    • Journal of Korean Physical Therapy Science
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    • v.15 no.1
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    • pp.57-66
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    • 2008
  • This study was conducted to investigate the effects of kinesio taping in patients with degenerative arthritis. 40 female patients with degenerative arthritis were voluntarily recruited and randomly divided into experimental and control group. Experimental group(mean age was 73.4 years, height was 153.5cm, and weight was 59.9kg) was applied patellar inferior and medial gliding, quadriceps, tibial external rotation, gastrocnemius, and soleus using a kinesio tape. And control group(mean age was 72.7 years, height was 154cm, and weight was 58.6kg) was received a interferential current therapy(ENDOMED 582, Enraf-Nonius, Holland). And we received a consent form from all subjects. Measuring was conducted by using a 3-dimensional gait analysis system for measuring of stride length, cadence, and velocity. The results were as follow: Stride length was significantly increased after than before treatment(p<.05). Cadence was significantly increased after than before treatment(p<.05). And Velocity was significantly increased after than before treatment(p<.05). Cadence was a significant difference between experimental and control group(p<.05), but there was no significant difference stride length and velocity between two groups. So we suggest that kinesio taping has a effectiveness in patients with degenerative arthritis.

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Fluttering Characteristics of Free-falling Plates (자유낙하하는 판의 fluttering 특성 연구)

  • Hong, Seulki;Chae, Seokbong;Kim, Jooha
    • Journal of the Korean Society of Visualization
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    • v.15 no.2
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    • pp.33-40
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    • 2017
  • Abstract In the present study, the characteristics of kinematics and dynamics in the fluttering motion of free-falling plates are investigated at Reynolds number of $10^5$. We record quasi-two-dimensional trajectories of free-falling plates with and without superhydrophobic coating using high-speed camera, and compute the drag and lift forces by trajectory analysis. Translational and angular velocities are modeled as harmonic functions with specific phase differences. In particular, periodic mass elevations near turning points are explained using the suggested models. At each turning point, a sudden drop in lift and a rapid increase in drag occur simultaneously due to fast increase in angle of attack. However, the lift is increased over the buoyancy-corrected weight of plate during gliding flight, resulting in periodic mass elevations near turning points. Superhydrophobicity is shown to increase lift but to reduce drag on a fluttering plate, resulting in the decrease of mean descent speed.

Development of a Plasma-Dump Reformer for Syngas Production (합성가스 생산을 위한 플라즈마-덤프 개질기 개발)

  • Lim, Mun Sup;Kim, Eun Hyuk;Chun, Young Nam
    • Journal of Hydrogen and New Energy
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    • v.25 no.6
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    • pp.586-593
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    • 2014
  • Limited sources of fossil fuels and also global climate changes caused by $CO_2$ emissions are currently discussed around the world. As a renewable, carbon neutral and widely available energy source, biogas is regarded as a promising alternative to fossil fuels. In this study, a plasma dump reformer was proposed to produce $H_2$-rich synthesis gas by a model biogas. The three-phase gliding arc plasma and dump combustor were combined. Screening studies were carried out with the parameter of a dump injector flow rate, water feeding flow rate, air ratio, biogas component ratio and input power. As the results, methane conversion rate, carbon dioxide conversion rate, hydrogen selectivity, carbon monoxide yield at the optimum conditions were achieved to 98%, 69%, 42%, 24.7%, respectively.

Erythrolobus australicus sp. nov. (Porphyridiophyceae, Rhodophyta): a description based on several approaches

  • Yang, Eun-Chan;Scot, Joe;West, John A.;Yoon, Hwan-Su;Yokoyama, Akiko;Karsten, Ulf;De Goer, Susan Loiseaux;Orlova, Evguenia
    • ALGAE
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    • v.26 no.2
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    • pp.167-180
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    • 2011
  • The unicellular marine red alga Erythrolobus australicus sp. nov. (Porphyridiophyceae) was isolated into laboratory culture from mangroves in Queensland and New South Wales, Australia. The single multi-lobed red to rose-red plastid has more than one pyrenoid and lacks a peripheral thylakoid. Arrays of small electron dense globules occur along the thylakoids. The nucleus is peripheral with a central to eccentric nucleolus. Each Golgi body is associated with a mitochondrion. The spherical cells are positively phototactic with slow gliding movement. The psaA + psbA phylogeny clearly showed that E. australicus is a distinct species, which is closely related to E. coxiae. The chemotaxonomically relevant and most abundant low molecular weight carbohydrate in E. australicus is floridoside with concentrations between 209 and 231 ${\mu}mol g^{-1}$ dry weight. Traces of digeneaside were also detected. These various approaches help to understand the taxonomic diversity of unicellular red algae.

Bacterial diseases of flounder, Paralichthys olivaceus (넙치의 세균성(細菌性) 질병(疾病))

  • Kanai, Kinya
    • Journal of fish pathology
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    • v.6 no.2
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    • pp.197-204
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    • 1993
  • Flounder culture has been developed mainly in the western parts of japan, and, to date, following six bacterial diseases have been reported. Bacterial white enteritis occurs in 16 to 30-day-old flounder larvae and often causes mass mortality in seed production. Bacterium named Vibrio sp. INFL invades and multiplies in the mucosae of posterier part of intestine, and causes desquamative enteritis. Gliding bacterial disease occurs mostly in juvenile stage and in spring to summer. Diseased signs are partial discoloration and erosion of skin and fins. Histologically, epidermis are removed, and the causative bacterium, Flexibacter maritimus, multiplies on the surface of demis and invades into the muscular tissue. Vibriosis caused by Vibrio anguillarum and related organisum is one of the well-known diseases among marine fish. Outbreaks of the disease in flounder culture are relatively few, but mass mortalities in fingerlings due to the disease were reported. An outbreak of nocardiosis in the autumn of 1984 has been reported, but since then the disease scarcely occurred. The disease is characterized by formation of abscesses under the skin and white nodes in the gill, heart, spleen and kidney. Streptococcicosis occurs frequently in recent years. Beta-hemolytic streptococcus is the causative bacterium, which possesses the same biochemical and serological characteristics as $\beta$-streptococci isolated from some marine and freshwater fish, and is seemed to related to Streptococcus iniae. Edwardsiellosis is the disease that causes most damage in flounder culture in Japan. Characteristic symptoms are swelling of abdomen and intestinal protrusion from the anus due to accumulation of ascites. Edwardsiella tarda, a well-known pathogen of freshwater fish, is the causative bacterium of the disease.

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Numerical Study on the Effects of Corrugation of the Gliding Dragonfly Wing (글라이딩 하는 잠자리 날개 주름의 영향에 대한 수치해석적 연구)

  • Kim, Won-Kap;Byun, Do-Young;Park, Hoon-Cheol
    • Journal of the Korean Society for Aeronautical & Space Sciences
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    • v.36 no.9
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    • pp.835-840
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    • 2008
  • We investigate the aerodynamic performance of the dragonfly wing which has the cross-sectional corrugation by using the static 2-dimensional unsteady simulation. Computational condition is at Re=150, 1400 and 10,000 with the angles of attack from 0 to 40 degrees. As computational results, the increment of the lift coefficient by corrugation is nearly constant over the critical angle of attack. Also, upper side corrugation of the wing have very little influence on increase of the lift coefficient.

How airplanes fly at power-off and full-power on rectilinear trajectories

  • Labonte, Gilles
    • Advances in aircraft and spacecraft science
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    • v.7 no.1
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    • pp.53-78
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    • 2020
  • Automatic trajectory planning is an important task that will have to be performed by truly autonomous vehicles. The main method proposed, for unmanned airplanes to do this, consists in concatenating elementary segments of trajectories such as rectilinear, circular and helical segments. It is argued here that because these cannot be expected to all be flyable at a same constant speed, it is necessary to consider segments on which the airplane accelerates or decelerates. In order to preserve the planning advantages that result from having the speed constant, it is proposed to do all speed changes at maximum deceleration or acceleration, so that they are as brief as possible. The constraints on the load factor, the lift and the power required for the motion are derived. The equation of motion for such accelerated motions is solved numerically. New results are obtained concerning the value of the angle and the speed for which the longest distance and the longest duration glides happen, and then for which the steepest, the fastest and the most fuel economical climbs happen. The values obtained differ from those found in most airplane dynamics textbooks. Example of tables are produced that show how general speed changes can be effected efficiently; showing the time required for the changes, the horizontal distance traveled and the amount of fuel required. The results obtained apply to all internal combustion engine-propeller driven airplanes.

A Study on the Maximum Target Distance Using a Flight Simulator of Glide-Type Ammunition (활공형 탄약의 비행모사 시뮬레이터를 활용한 조건별 최대사거리 연구)

  • Shin, Seung-je;Kim, Whan-Woo
    • Journal of Korea Multimedia Society
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    • v.21 no.6
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    • pp.698-704
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    • 2018
  • When the new ammunition is designed, it is necessary to confirm in advance how long the target distance is depends on the shape and weight of the designed ammunition. Therefore we can use commercial software such as PRODAS to predict the target distance in the design stage. This commercial software has aerodynamic data for various ammunition shape and calculates the target range by calculating the kinetic equations of the ammunition using the aerodynamic data most similar to the designed ammunition. The ammunition for predicting the target distance through software such as PRODAS is a non-guided ammunition that has no control after launch but the glide type ammunition is guided and control ammunition. So it is predicts the state of ammunition after the launch. A new type of simulator is needed to analyze the maximum range and to verify the onboard guided and control algorithm. The simulator constructed in this paper is an optimized simulator for glide type ammunition. Unlike unmanned aircraft and guided missiles. The rotation characteristics of the ammunition are considered and the navigation initialization algorithm is applied. The constructed simulator confirmed the performance by performing maximum range analysis of glide type ammunition.

Pedobacter xinjiangensis sp. nov., from the Desert, Xinjiang

  • Tang, Yali;Wang, Yang;Ji, Shanming;Zhang, Kundi;Dai, Jun;Zhang, Lei;Peng, Fang;Fang, Chengxiang
    • Journal of Microbiology and Biotechnology
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    • v.20 no.2
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    • pp.397-402
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    • 2010
  • A Gram-negative, rod-shaped, gliding, aerobic bacterium, designated $12157^T$, was isolated from the desert of Xinjiang, China and subjected to a polyphasic taxonomic study. The strain $12157^T$ grew optimally at pH 7.0 and $30^{\circ}C$. MK-7 was the predominant respiratory menaquinone. The DNA G+C content was 42.0 mol%. Phylogenetic analysis based on the 16S rRNA gene sequences showed that the isolate was mostly related to members of the genus Pedobacter, with similarities ranging from 90.0% to 93.7%. Phylogenetic evidence and the results of phenotypic and genotypic analyses support the establishment of a novel species, Pedobacter xinjiangensis sp. nov., with strain $12157^T$ (=CCTCC AB $208092^T$=NRRL B-$51338^T$) as the type strain.

Reconstruction for Soft Tissue Defect of Dorsum of Hand or Foot with Free Temporal Fascial Flap (유리 측두 근막판을 이용한 수배부 및 족배부 연부조직 결손의 재건)

  • Lee, Byoung Ho;Nam, Yun Kwan;Ju, Pyong
    • Archives of Reconstructive Microsurgery
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    • v.9 no.1
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    • pp.37-43
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    • 2000
  • Vascularized tissue coverage is necessary for treatment of soft tissue defect with bone and tendon exposure on hand and foot dorsum, which cannot be successfully covered with simple skin graft or local flap. The temporal fascia is one of the most ideal donor for coverage of soft tissue defect of dorsum of hand or foot in term of ultra-thin, pliable and highly vascular tissue. Also, this flap offers the advantage of a well-concealed donor site in the hair-bearing scalp and smooth tendon gliding. We have experienced 11 cases of reconstruction for soft tissue defect in the hand or foot using temporal fascial flap with skin graft. All cases survived completely and we could gain satisfactory functional results. There were no specific complications except one donor site alopecia We think that the free temporal fascial flap coverage is a highly reliable method for soft tissue defect in hand and foot dorsum. However, the potential pitfalls is secondary alopecia and requirement of skin graft after its transfer.

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