• Title/Summary/Keyword: Opening/closing time

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Effects of Proprioceptive Neuromuscular Facilitation Program Combined with Dynamic Neuromuscular Stabilization Approach on Balance in Patient with Cerebellum Atrophy -Case Report- (동적 신경근 안정화 접근법과 결합한 PNF 중재 프로그램이 소뇌 위축 환자의 균형에 미치는 영향 -사례보고-)

  • Na, Eun-Jin;Moon, Sang-Hyun;Kim, Eun-Kyung;Park, Du-Jin
    • PNF and Movement
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    • v.14 no.3
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    • pp.237-244
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    • 2016
  • Purpose: This case report examines the influence of proprioceptive neuromuscular facilitation (PNF) combined with a dynamic neuromuscular stabilization approach on balance in patients with cerebellar atrophy. Methods: The target subject of this case report was a 34-year-old woman who was informed of the purpose of this research and voluntarily agreed to participate in it. The case report conformed to research ethics based on the Helsinki Declaration. The target subject was confirmed to have cerebellar atrophy from an unknown cause in 2009 and was diagnosed with slight ataxia. At that time, she could carry out daily activities without physical therapy. On May 19, 2015, she suffered both a subdural hemorrhage (SDH) and subarachnoid hemorrhage (SAH) in a traffic accident. She was urgently moved to the emergency room and managed by nonsurgical treatment, and then, the cerebellar atrophy and ataxia gradually deteriorated. To evaluate the patient's balance capacity before and after intervention, the trunk impairment scale (TIS), trunk impairment scale (OLST) during eye-closing/opening, timed up and go test (TUG), and visual analogue scale (VAS) were conducted. The PNF intervention program was executed for 30 min, four times a week, for three weeks. Results: The TIS and OLST during eye-closing/opening were improved by as much as a point, by 8.15 s and 6.21 s, respectively, after applying the PNF program. TUG and VAS decreased by 1.33 s and 3 points, respectively, after intervention. According to the result, the OLST during eye-closing/opening and VAS improved remarkably in comparison with those before intervention. Conclusion: As the final result of the case report, PNF intervention combined with DNSA more effectively improved the static balance capacity, such as the OLST during eye-closing/opening and VAS, compared to the dynamic balance capacity. In addition, the intervention duration and period of the exercise program are recommended to be more than 1 h a day for four weeks considering the learning ability of a patient with cerebellar atrophy.

Transient Characteristics by Transformer %Impedance at the time of Opening the Main Circuit Breaker on the Electric Railway Vehicle (전기철도차량 주변압기의 %임피던스에 따른 차단기 개폐시 과도특성 분석)

  • Chang, Sang-Hoon
    • The Transactions of The Korean Institute of Electrical Engineers
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    • v.63 no.5
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    • pp.719-725
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    • 2014
  • Transient of Electric railway vehicle occurs when change to another state. The duration of the transient phenomenon only takes a few second. During this time is considered, the present of short circuit current and the normal state, the energy is present in the form of a magnetic field. Recognized by the vibration of the transient voltage or transient current at witch energy is present in the field. This paper is presented the result of transient characteristics by transformer % impedance at the time of opening and closing of the main circuit Breaker on the electric railway vehicle.

A Study on the Decreasing Method of Secondary Arc Current on Single Phase Reclosing (단상 재폐로시 2차아아크 전류의 감소방법에 관한 연구)

  • 김준현
    • 전기의세계
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    • v.26 no.6
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    • pp.59-65
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    • 1977
  • A study on the decreasing method of secondary arc current on single phase reclosing. One of the major problem in case of using the single phase reclosing scheme for long distance UHV transmission line is the time required to deionize secondary arc current. This paper descritbes the way of inducing the formular of secondary arc current originated at the times of opening and closing the ground interrupting switch. The result was investigated by the method of numerical analysis and proved that the secondary arc current was decreasing sufficiently. Application of this method proposed by the authod makes it possible to deduce the dead time and to improve success-rate of reclosing.

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Improvement of detecting speed of small target using SAD algorithm (SAD 알고리즘을 이용한 소형표적 검출속도 개선)

  • Son, Jung-Min;Ahn, Sang-Ho;Kim, Jong-Ho;Kim, Sang-Kyoon
    • Journal of Korea Society of Industrial Information Systems
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    • v.18 no.4
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    • pp.53-60
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    • 2013
  • We propose a method for improving detection speed of small target detection system using SAD algorithm. First, the proposed method deletes clutters using a median filter. Next, it does closing and opening operation using various size of structure elements, and extracts candidate pixels for a target with subtraction operation between the results of closing and opening operation. It finally detects a small target using a gaussian distance function from the candidate pixels. To improve detection speed, it detects a target performing SAD algorithm only for the predicted target areas for next every 7 frames. The proposed method not only enables a real time process because it considers only predicted area but also shows detecting rate of 97%.

Dynamic Characteristics Analysis of High Speed Thomson-coil Arc Eliminator Using Equivalent Electric Circuit Method with Adaptive Segmentation of conducting Plate

  • Li, Wei;Lu, Jiang;Jeong, Young-Woo;Koh, Chang-Seop
    • Proceedings of the KIEE Conference
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    • 2008.10c
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    • pp.90-92
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    • 2008
  • A novel solving technique has been developed to analyze the dynamic characteristics of high speed Thomson-coil arc eliminator. The electromagnetic repulsion actuator based on Thomson-coil is taken as the driving part of the arc eliminator, due to which, the opening and closing time is quite short compare to other type actuators. The electromagnetic repulsion actuator is composed of one repulsion plate and two fixed coils, corresponding to the opening coil and closing coil, respectively. The new solving technique is derived based on the equivalent electric circuit model of the system which is set up by dividing the repulsion plate into multi segments using adaptive segmentation method. This solving technique is applied to the dynamic characteristic analysis of electromagnetic repulsion actuators in high speed Thomson-coil arc eliminators. The calculation results are testified by the FEM calculation results and experiment results.

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${\ll}$영추(靈樞).근결(根結)${\gg}$ 에 대한 연구(硏究)

  • Geum Gyeong-Su;Jeong Heon-Yeong;Kim Nam-Su;Jang Jong-Yeol
    • Journal of Korean Medical classics
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    • v.13 no.1
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    • pp.74-101
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    • 2000
  • Geungyul(根結) means roots and nodes of meridians. If human body gets damaged by energy which each seasons has, the meridians get some troubles. Healing for symptom, meridians consist of root, stay, follow, inpouring and node of acupuncture points should be in harmony. 1. This chapter explain roots and node parts of each meridian, acupuncture points name and root, stay, follow, inpouring of acupuncture points which in arm and leg of three Yin and Yang. 2. The opening, closing, axis function, the symptom, and the needling of both meridians of Yin and Yang are explained. 3. The method that predicts the rise-and-fall of visceral energy and the time of death by using an order of pulse and intermittent pulse is explained. 4. It is explained that since the physical condition of the rich and the poor are different, the method using a needling for each person to be healed, such as the deep-and-shallow and the quick-and-slow, are different. 5. It is explained that the excess and the deficiency in the energy of shape should be considered when a acupuncture is given.

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An Experimental Study on Water-Hammer Effect for Spacecraft Propulsion System (인공위성 추진계통 관로내의 수격효과에 관한 실험적 연구)

  • Kwon, Ki-Chul;Lee, Eun-Sang;Park, Sang-Min;Kang, Shin-Jae;Rho, Byung-Joon
    • Proceedings of the KSME Conference
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    • 2001.06e
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    • pp.288-293
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    • 2001
  • This paper presents the water-hammer effect due to the rapid opening and closing of isolation valve and thruster valve in the spacecraft propulsion system. The single propellant feed system was modeled to investigate the maximum peak pressure due to the water-hammer effect. The test parameters are tank supply pressure, shape and throat length of orifice and line length. Kerosene was used as the inert simulant propellant liquid instead of hydrazine. As downstream line length after isolation valve increased from 1.5 to 2.5m, the maximum line-filling water-hammer peak pressure decreased, but the average time interval between peak pressures increased. The maximum line-filling water-hammer peak pressure with orifice was lower than without orifice, and the maximum line-filling water-hammer peak pressure with orifice at the back of isolation valve was lower than with orifice in front of isolation valve. Without orifice, the maximum water-hammer peak pressure due to the rapid opening and closing of the thruster valve was about 126% of tank supply pressure. With orifice, it decreased. As orifice throat length increased, it decreased. The maximum water-hammer peak pressure due to the rapid closing of the thruster valve with converging-diverging orifice was lower than normal orifice. It was found that the orifice as a means of pressure drop was very effective to reduce the water hammer peak pressure at the thruster valve. The results of this study can be used for the design of spacecraft liquid propulsion feed system.

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Mandibular Movement Pattern During Mastication (저작시(咀嚼時) 하악운동(下顎運動)의 양상(樣相))

  • Bae, Young-Soo;Jo, Kwang-Hun
    • The Journal of Korean Academy of Prosthodontics
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    • v.24 no.1
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    • pp.117-124
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    • 1986
  • Numerous studies have been reported on the movement of the jaw during chewing. However, there is still much controversy. The purposes of this study were to observe the jaw movement during mastication and to provide the information in prosthodontic treatment and diagnosis of temporomandibular disorder. The author analyzed the time and characteristics of the masticatory movement during chewing using mandibular kinesiograph in 24 subjects, 17 males 7 females, age of 22-27 without orofacial problems. The obtained results were as follows: The duration of single chewing cycle was $515{\pm}87msec.$. Comparing the three phases of the chewing cycle (opening, closing, centric pause), the closing phase had the longest duration, and the centric pause had the shortest duration. The maximal laterotrusive movement of the mandible druing chewing was $3.5{\pm}1mm$. The maximal mediotrusive movement of the mandible during chewing was $1.0{\pm}0.7mm$. The maximal vertical velocity of the mandible during chewing was $120{\pm}28mm/sec.$ in opening phase, and $109{\pm}21mm/sec.$ in closing phase.

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A preliminary simulation for the development of an implantable pulsatile blood pump

  • Di Paolo, Jose;Insfran, Jordan F.;Fries, Exequiel R.;Campana, Diego M.;Berli, Marcelo E.;Ubal, Sebastian
    • Advances in biomechanics and applications
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    • v.1 no.2
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    • pp.127-141
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    • 2014
  • A preliminary study of a new pulsatile pump that will work to a frequency greater than 1 Hz, is presented. The fluid-structure interaction between a Newtonian blood flow and a piston drive that moves with periodic speed is simulated. The mechanism is of double effect and has four valves, two at the input flow and two at the output flow; the valves are simulated with specified velocity of closing and reopening. The simulation is made with finite elements software named COMSOL Multiphysics 3.3 to resolve the flow in a preliminary planar configuration. The geometry is 2D to determine areas of high speeds and high shear stresses that can cause hemolysis and platelet aggregation. The opening and closing valves are modelled by solid structure interacting with flow, the rhythmic opening and closing are synchronized with the piston harmonic movement. The boundary conditions at the input and output areas are only normal traction with reference pressure. On the other hand, the fluid structure interactions are manifested due to the non-slip boundary conditions over the piston moving surfaces, moving valve contours and fix pump walls. The non-physiologic frequency pulsatile pump, from the viewpoint of fluid flow analysis, is predicted feasible and with characteristic of low hemolysis and low thrombogenesis, because the stress tension and resident time are smaller than the limit and the vortices are destroyed for the periodic flow.

Comparative Study of Vertical Axillary Muscle Sparing and Posterolateral Thoracotomy (수직액와 근육보존 개흉술과 후측방개흉술의 비교연구)

  • Seong, Suk-Hwan;Won, Tae-Hui
    • Journal of Chest Surgery
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    • v.27 no.12
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    • pp.1008-1014
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    • 1994
  • Increased interest in alternative approach to thoractomy has developed because of the considerable morbidity associated with the standard posterolateral thoracotomy[ST]. Muscle sparing thoracotomy is appeared as excellent alternative because of less postoperative pain and morbidity than standard posterolateral one. Vertical axillary muscle sparing thoracotomy[VM] is the newly revised modified muscle sparing thoracotomy that overcomes the disadvantages of previous lateral muscle sparing thoracotomy such as seroma, cosmetic problems, and need of subcutaneous drains. We conducted a prospective study of 45 consecutive patients to compare postoperative pain, muscle strength of serratus anterior and latissimus dorsi, and range of motion of the shoulder girdle between ST and VM group. There were no difference in preoperative status, surgical procedure, morbidity, mortality and hospital stay between two groups. But there were significant less postoperative narcotics requirements, more preserved latissimus dorsi and serratus anterior muscle strength, nd larger range of motion of shoulder girdle [ especially flexion and internal rotation in VM group. The opening time was prolonged[p<0.01] but closing time was less in VM group [p<0.01]. The sum of opening and closing time was not different in two group. The length of incision line was shorter in VM group. The vertical skin incision was concealed by the upper arm.In conclusion vertical axillary muscle sparing thoracotomy is good alternative for various intrathoracic procedures with less postoperative pain, well preserved muscle strength,increased range of motion of the shoulder girdle and impressive cosmetic outcome.

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