• 대한물리의학회지
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• 제9권4호
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• pp.439-445
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• 2014

PURPOSE: This study was to investigate the effect of direction of gliding in the tibiofibular (TF) joint on angle of active ankle dorsiflexion (AADF). METHODS: Fifteen subjects with no medical history of lower extremities were recruited in this study. The digital dynamometer was used to maintain the same gliding force in each condition. The angle of AADF was measured by using the electronic goniometer. Subjects were instructed to perform the AADF in three trials during the each gliding in the TF joint by the examiner. The conditions were no gliding and four directions of gliding in the proximal (anterior-superior: A-S vs posterior-inferior: P-I) and distal (posterior-superior: P-S vs. anterior-inferior: A-I) TF joint. A repeated measured ANOVA was used to compare angle of the AADF in each TF joint. The paired-sample t tests with Bonferroni correction were used in order to Post hoc pair-wise comparisons. The significant level was set at 0.016 (0.05/3). RESULTS: In distal TF joint, the angle of AADF in the A-I direction of gliding was significantly lower than those in no gliding and P-S direction of gliding (p<0.01). In proximal TF joint, the angle of AADF was significantly lower than those in no gliding and A-S direction of gliding (p<0.01). Although there was no significant differences, angle of AADF were largest in the P-S direction of gliding among four conditions. CONCLUSION: These findings suggest that gliding technique of TF joint would be required to improve the angle of AADF in subjects with limitation of ankle dorsiflexion.

• 조명전기설비학회논문지
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• 제25권4호
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• pp.65-70
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• 2011

Perfluorocompounds (PFCs) gases were decomposed by gliding arc plasma generated by AC pulse power. $N_2$ gas of 10 LPM flow rate and $H_2$ gas of 0.5 LPM were introduced into the gliding arc plasma generated between a pair of electrodes with SUS 303 material, and the PFCs gases were injected in the plasma and thereby were decomposed. The PFCs gas-decomposition-characteristics through the gliding arc plasma were analyzed by FT-IR, where pure $N_2$ and $H_2$-added $N_2$ environment were used to generate the gliding arc plasma. The PFCs gas-decomposition-properties were changed by electric power for gliding arc plasma generation and the H2 gas addition was effective to enhance the PFCs decomposition rate.

• 한국운동역학회지
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• 제22권2호
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• pp.159-171
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• 2012

The purpose of this study was to provide information about kinematic variables of the gliding and delivery motion of Hyung-Keun Lee, a high school shot putter who was ranked 1st at the 2011 National Sports Festivals. Three-Dimensional motion analysis using a system of 4 video cameras at a sampling frequency of 60 Hz was conducted during shot-putting events at the 2011 National Sports Festivals. During the gliding and delivery phase of the player the results showed following characteristics; 1) The gliding technique types of the player appeared to be the short-long technique as the gliding and stance length ratio were $42.3{\pm}3.87$ % and $57.7{\pm}3.87$ %, respectively. In addition, the trajectory of shots during the gliding and delivery phase showed different trajectory patterns with "S-shaped" type of elite players due to the deviation from a central axis of the APSS (athletic-plus shot system). 2) The horizontal velocity of COG made from gliding should maintain the velocity during transition and release phase, but the player showed a small momentum for a gradual decrease of velocity. 3) Therefore, the player requires to adjust an appropriate ratio between gliding and stance length with a strong muscle power at the trunk, throwing arm, and the lower extremity during gliding and delivery phase.

• International Journal of Naval Architecture and Ocean Engineering
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• 제9권6호
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• pp.693-704
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• 2017

Blended-Wing-Body Underwater Glider (BWBUG), which has excellent hydrodynamic performance, is a new kind of underwater glider in recent years. In the shape optimization of BWBUG, the lift to drag ratio is often used as the optimization target. However this results in lose of internal space. In this paper, the energy reserve is defined as the direct proportional function of the internal space of BWBUG. A motion model, which relates gliding range to steady gliding motion parameters as well as energy consumption, is established by analyzing the steady-state gliding motion. The maximum gliding range is used as the optimization target instead of the lift to drag ratio to optimizing the shape of BWBUG. The result of optimization shows that the maximum gliding range of initial design is increased by 32.1% though an Efficient Global Optimization (EGO) process.

• The Journal of Korean Physical Therapy
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• 제31권5호
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• pp.286-291
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• 2019

Purpose: This study examined the effects of self-volar gliding combined with a strap and wrist distraction on pain and the active and passive wrist extension range of motion (ROM) in subjects with dorsal wrist pain during partial weight bearing of the hand. Methods: Thirty subjects (14 males and 16 females) with dorsal wrist pain during partial weight bearing through the hand participated in this study. The two different self-volar gliding techniques were performed for each group. Self-volar gliding using a strap (SVGS) and SVGS and wrist distraction (SVGSD) were performed five times for one week for each group. The active and passive ROM of wrist extension and the peak pressure pushed by the hand at pain (PPHP) were measured. An independent t-test was used to compare the improvements of these elements between the two different self-volar gliding techniques. The level of statistical significance was at ${\alpha}=0.05$. Results: The active and passive ROM of wrist extension and PPHP were greater in both self-volar gliding groups after the one week intervention. On the other hand, these parameters were greater in the SVGSD group than in the SVGS group (p<0.05) Conclusion: SVGSD is recommended to improve the active and passive ROM of wrist extension and PPHP in subjects with dorsal wrist pain during partial weight bearing of the hand.

• 대한기계학회:학술대회논문집
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• 대한기계학회 2007년도 춘계학술대회A
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• pp.395-398
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• 2007

In nature, the swallowtail butterfly is known to be a versatile flyer using gliding and flapping efficiently. Furthermore, it has long tails on the hind-wing that may be associated with the enhancement of the gliding performance. In the present study, we investigate the aerodynamic property of swallowtail butterfly wing in gliding. We use an immersed boundary method and conduct a numerical simulation at the Reynolds numbers of 1,000 - 3,000 based on the free-stream velocity and the averaged chord length for seven different attack angles. As a result, we clearly identify the existence of the wing-tip and leading-edge vortices, and a pair of the streamwise vortices generated along the hind-wing tails. Interestingly, at the attack angle of $10^{\circ},$ hairpin vortices are generated above the center of the body and travel downstream.

• 한국미생물·생명공학회지
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• 제30권3호
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• pp.199-205
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• 2002

활주운동은 편모의 작용없이 고체의 표면을 미끄러지듯이 이동하는 박테리아의 운동방식으로 분류학상 다양한 종의 박테리아에서 발견된다. 지금까지 밝혀진 바에 의하면 활주 운동은 type IV pili(Tfp)를 필요로 하는 경우와 이를 필요로 하지 않는 두 가지로 크게 구분될 수 있는데, Tfp를 필요로 하는 경우에는 T룰의 확장과 수축에 의해 이루어지는 twitching motility와 운동기작이 흡사할 것으로 추정된다 Tfp를 필요로 하지 않는 활주운동에 대해서는 여러 다양한 모델이 제시되었는데, 이중 한 모델은 활주박테리아가 점액을 분출함으로서 추진력을 얻어 앞으로 진행한다는 설명이며, 다른 모델들은 외벽에 세포 전체를 감싸는 운동기구가 존재한다는 것이다. 이와 같이 활주운동은 일반적으로 잘 알려진 편모에 의한 운동과는 전혀 다른 운동방식에 의해 이루어지는데, 그 작용 기작이 매우 흥미로운 반면에 많은 부분들이 풀어야 될 숙제로 남아있어 앞으로의 연구결과들이 기대된다.

• 대한물리치료과학회지
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• 제13권4호
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• pp.27-34
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• 2006

Purpose : The purpose of this study is to prove the increasing range of motion of joint to the patients of adhesive capsulitis of the shoulder applied the gliding-mobilization. Subjects and methods : The subjects are patients of adhesive capsulitis of the shoulder who have limited range of motion due to capsular pattern on the shoulder. The subjects are volunteer patients without a history of neuromuscular problems and randomly distributed into two groups. 15 experimental subjects(4 male, 11 female) received therapy with gliding-mobilization applied on limited shoulder joint and a second group with 15 control subjects(6 male 9 female) was treated by physiological passive range of motion therapy. The data were analyzed with paired t-test to determine striking differences depending on the course of treatment. Result : 1) In the group treated by gliding-mobilization the range of motion in shoulder flexion was increased in accordance to the course of treatment, and paired t-test showed striking differences(p<.05). 2) The range of motion in shoulder extension was increased in accordance to the course of treatment, and paired t-test showed striking differences(p<0.05). 3) The range of motion in shoulder abduction was increased with serise of treatment, and paired t-test showed striking differences(p<0.05). Conclusion : The gliding-mobilization increases the range of motion of the patient of adhesive capsulitis of the shoulder.

• 한국시뮬레이션학회논문지
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• 제28권1호
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• pp.49-56
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• 2019

전산해석과 풍동시험을 이용하여 유도형 활공탄약의 공력특성을 연구하였다. 전산해석으로는 반실험적 기법인 Missile DATCOM과 전산유체역학 해석프로그램인 FLUENT를 사용하였다. 유도형 활공탄약에 대해 양력 및 항력, 피칭모멘트 등을 계산하여 기본적인 공력특성을 확인하였으며 기존의 탄약과는 전혀 다른 공력특성을 갖는 것을 확인했다. 전산해석을 통해 얻은 결과는 풍동시험을 통해 얻은 결과와 대체적으로 유사했다. 반실험적 기법으로 얻은 결과 중 피칭모멘트 값은 풍동시험결과와 약간 차이가 났지만, 전체적으로 전산해석의 결과는 시험결과와 유사한 경향과 값을 나타냈다. 본 연구를 통해 유도형 활공탄약의 공력특성을 확인하였으며, 유도형 활공탄약 초기설계 시 공력특성 분석을 위해 반실험적기법 및 전산유체역학적 해석 기법을 적용할 수 있음을 확인하였다.

• Journal of Microbiology and Biotechnology
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• 제16권5호
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• pp.771-777
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• 2006

A novel gene (agiA) required for adventurous gliding motility in Myxococcus xanthus has been identified. Null mutations in this gene caused defects in the gliding movement of isolated cells, suggesting that it belongs to one of the A-motility genes. The isolated agiA mutant cells neither glided nor produced slime trails on agar surface. However, agiA was different from other known A-motility genes in that the agiA mutant created in the $S^-$ mutant background glided in the swarm of cells, since other known A-motility mutants created in the $S^-$ mutant background do not move in the swarm of cells. The agiA mutant was also defective in fruiting body development. Sequence analysis predicted that agiA encodes a 787-amino-acid protein with eight tripeptide repeat motifs.