• 한국초전도저온공학회:학술대회논문집
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• 한국초전도저온공학회 2000년도 KIASC Conference 2000 / 2000년도 학술대회 논문집
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• pp.58-59
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• 2000

The influence of voltage lead and tape arrangements on self-field losses was investigated by using a 1.5m long Bi-2223 tape. Experimental results show that the measured losses are strongly dependent on voltage lead configurations but not contact positions. The losses are independent on frequencies below critical current of the tape. It menas that the self-field losses are purely hysteretic.

• 대한전기학회:학술대회논문집
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• 대한전기학회 1999년도 추계학술대회 논문집 학회본부 A
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• pp.446-449
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• 1999

본 연구에서는 기존의 자성 웨지의 제조공정을 대체하여 제조 공정이 단순하고, 그의 정밀성이 우수한 tape casting-lamination법에 의한 자성 웨지의 제조 공정의 적용 가능성에 대한 연구를 수행하였다. 철 분말과 에폭시 slurry는 우수한 tape casting 특성을 보여주었으며, 이렇게 얻어진 green tape과 유리 섬유를 적층하여 자성 웨지를 얻었다. 이러한 과정을 거쳐서 얻어진 제품의 품질 특성을 평가한 결과, 기존의 제조 공정으로 얻어진 제품에 비하여 품질의 균일성이 우수하며, 제조 공정을 혁신적으로 단축하는 것이 가능한 것을 보여주고 있다.

• 동력기계공학회지
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• 제10권3호
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• pp.17-22
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• 2006

Surface modifications like rib-roughening and displaced insert devices like the twisted tape are commonly used in applications such as compact heat exchangers and cooling systems. In this paper, regionally averaged heat transfer distributions in square channels with twisted tape inserts and with twisted tape inserts plus interrupted ribs are respectively investigated. The square ribs are arranged to follow the trace of the twisted tape and along the flow direction defined as axial interrupted ribs. Each wall of the square channel is composed of isolated aluminum sections. Regionally averaged Nusselt number and channel averaged Nusselt number in turbulent air flows are presented for Reynold numbers from 8,900 to 29,000. We have obtained the following conclusions from the experimental study: 1) The local Nusselt number in the two-sided heated case is higher than that in the four-sided heated condition. 2) In the 4 heating wall channel with twisted tape inserts, Nusselt number based on bottom wall temperature is enhanced by 1.2 - 1.6 times if adding the axial interrupted ribs on the bottom wall only. 3) The twisted tape with interrupted ribs under the two-sided heating condition produces the highest heat transfer coefficient.

• PNF and Movement
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• 제9권3호
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• pp.25-29
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• 2011

Purpose : We investigated the effect of anti-flexion taping at the proximal interphalangeal joints on the gait in stroke patients with clawing toe. Methods : Nineteen patients (mean age $63.26{\pm}9.16$ years) with clawing toe were studied. Gait performance was measured under two different conditions : (1) non-tape (2) application of tape. Gait velocity, step time and stride length were examined with the GAITRite system Results : Compared to the non-tape control condition, step time of the hemiparetic side increased significantly after the application of tape(p=0.03). There was no significant mean differences between the taped and control conditions for stride length of the hemiparetic side and velocity. Conclusion : Whilst the anti-flexion tape at the proximal interphalangeal joints changed the walking by providing significant step time effect, positive changes were noted in stride length of the hemiparetic side after tape application. These findings indicate that anti-flexion tape procedures do not significantly alter stride length of the hemiparetic side and velocity.

• 대한기계학회:학술대회논문집
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• 대한기계학회 2007년도 춘계학술대회B
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• pp.2402-2407
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• 2007

Heat transfer distributions and friction factors in square channels (3.5 ${\times}$ 3.5 cm) with twisted tape inserts and with twisted tape inserts plus interrupted ribs are respectively investigated. Tests are performed for Reynolds numbers ranging from 8,900 to 29,000. The rib height-to-channel hydraulic diameter, e/Dh, is kept at 0.057 and test section length-to-hydraulic diameter, L/Dh is 30. The twisted tape is 0.1 mm thick carbon steel sheet with diameter of 3.3cm, length of 90cm, and 2.5 turns. The square ribs are arranged to follow the trace of the twisted tape and along the flow direction defined as axial interrupted ribs. Each wall of the square channel is composed of isolated aluminum sections. The following conclusions from the experimental study were drawn as: 1) In the 4 heating wall channel with twisted tape inserts, Nusselt number based on bottom wall temperature is enhanced by 1.2 - 1.6 times if adding the axial interrupted ribs on the bottom wall only. 2) The twisted tape with interrupted ribs under the two-sided heating condition produces the highest heat transfer performance. 3) Friction factor data obtained for the square channel with twisted tape inserts plus axial interrupted ribs are less than those in the past publications for circular tubes with axial interrupted ribs and twisted tape inserts.

• 대한물리의학회지
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• 제5권4호
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• pp.527-534
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• 2010

Purpose : The application of tape to modulation of pain and muscular excitability has become common clinical practice among musculoskeletal physical therapy. However, the techniques of the tape application has been relied on empirical evidence in preference to the neurophysiological evidence. Thus, the mechanism of taping has to be elucidated further. The aim of this study was to determine whether elastic and non-elastic taping across a muscle does indeed change ${\alpha}$-motor neuron excitability. Methods : The study was performed on 10 neurologically healthy adults. Two different types of tape were applied to skin overlying gastrocnemius. The elastic tape stretched up to 120% of its original length but non-elastic tape didn't stretched up of its original length. The tape applied across the direction on thickest part of the gastrocnemius. The ${\alpha}$-motor neuron excitability of the gastrocnemius was assessed using the gastrocnemius H-reflex. The amplitude of the M-wave and H-reflex were measured across three conditions: before tape application, with tape and with the tape removed. Results : No significant changes of the excitability of the ${\alpha}$-motor neuron were obtained across three condition, either in the elastic and non-elastic tape. Conclusion : From the results, I could come to the conclusion that further clinical work will be required.

• 한국자기학회지
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• 제7권6호
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• pp.314-320
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• 1997

폴리에스터 film 위에 자성도료를 도포 후 자성체의 배향 거동을 살펴보았다. static orientation 처리하여 평가한 결과 자성도료가 도포된 film이 배향자석을 통과할 때 배향자석의 입구측과 출구측에서 배향성이 최대로 나타나나 출구측이 약간 낮게 나타났으며 배향자석의 출구를 지나면서 static energy의 감소와 entropy의 증가에 의하여 도막의 건조과정 중 배향성은 서서히 감소되다가 완전히 건조되면서 일정한 수준으로 유지되었다. 그리고 film의 중심부보다 양쪽의 edge 부위에서의 배향성은 떨어지는데 그 원인은 배향자석의 형태에 기인하는 것으로 생각된다. Dynamic orientation 처리하여 평가한 결과 자기 tape에서 자성도막의 배향성이 향상됨에 따라 전 대역에서의 출력 특성은 향상되었으며 건조 조건에 따라서도 tape의 배향성이 변하였다. 따라서 자기 tape의 출력특성을 향상시키기 위하여는 배향자석의 설계 및 자성도료의 건조 조건 등의 검토가 필요하다고 생각한다.

• 한국윤활학회:학술대회논문집
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• 한국윤활학회 1999년도 제29회 춘계학술대회
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• pp.220-224
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• 1999

Sliding wear test was employed to determine the effect of whisker content and orientation on the firiction and wear behavior of SiC whisker reinforced alumina. Composites containing unidirectionally oriented whiskers were prepared by a modified tape casting followed by lamination, binder removal and hot pressing in order to align the whiskers in the tape casting direction. Wear coefficients on three directions were measured; parallel and normal to the tape casting direction on the tape casting surface and normal to lamination direction on surfnce normal to the tape casting direction. In the effect of whisker orientation, the highest wear rate was obtained in the direction parallel tape casting direction and the lowest in the direction normal to lamination direction at all temperatures. Silicon oxide layer amoothing the surface was detected by energy dispersive X-ray analysis on the worn surface.

• 한국자기학회지
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• 제6권1호
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• pp.28-35
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• 1996

자기 테이프 제조용 초미립 자성 철 분말의 분산 거동을 파악하기 위하여 vinyl계 바이더, polyurethane 바인더, 윤활제등 첨가제 종류 및 양에 따른 분산 거동 및 물리특성들을 조사하였다. 분산성은 바인더의 funtional group의 종류, 자성체와 바인더의 비율등에 크게 영향을 받았으며 적정 조건의 선택으로 분산성은 종래보다 20% 증가하 였다. 이에 따라 자기 특성중 포화 자화는 종래의 경우보다 200 Gauss 증가하였으며, 전자 변환 특성중 휘도 S/N (signal to noise ratio)은 2dB 증가하였다. 적절한 윤활제의 종류및 양에 따라 tape의 마찰계수는 0.15 감소하였으며, 이에 따라 tape의 내구성중 휘도 S/N 열화특성이 4dB 이상 향상되었다.

• 한국초전도저온공학회:학술대회논문집
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• 한국초전도저온공학회 1999년도 제1회 학술대회논문집(KIASC 1st conference 99)
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• pp.10-13
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• 1999

For large scale applications of high temperature superconductor(HTS) such as transmission cables, motors and generators, long length of flexible HTS conductors is required. Currently, HTS tape that is capable of being fabricated in long length by industrial processes is the Bi-2223 HTS tape. In this study, we fabricated 19 filamentary Bi-2223($Bi_{1.8}$$Pb_{0.4}$$Sr_{2}$$Ca_{2}$$Cu_{3}$$O_{10+X}$) HTS tape with 100m length by PIT(Powder In Tube) process. Critical current(Ic) of this long length tape was measured 18.5 A at 77 K, self field and short sample Ic is 32.5 A at the same condition. Critical current of 100m length tape was decreased by about 1/3 compared to that of short tape. This was mainly resulted from the increase of non homogeneity in oxide layer.