• 대한임상전기생리학회지
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• 제4권1호
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• pp.39-47
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• 2006

Functional Electrical Stimulation(FES) cause paralysed muscles to contract in some clinical circumstances. Generally, FES has been thought of as a valuable tool in activating any skeletal muscle paralysed as a result of upper motor neuron damage. But, the function of cardiac and smooth muscle is also affected by upper motor neuron damage. Today, various applications of FES are investigated, including conditioning cardiovascular exercise, caugh and breathing assistant, improving bowel and bladder control, hand grasp, standing and walking etc. This review will focus on the literature reporting application of FES to control respiratory capabilities and internal organ function as well as increase muscular strength, hand grasp, standing and walking in patients with upper motor diseases.

• 한국전문물리치료학회지
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• 제5권2호
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• pp.106-117
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• 1998

The pain is common among individuals with physical disabilities. It can interfere with therapy since patients with pain can become uncooperative and reluctant to move. This paper reviews the natural physiological mechanisms that can reduce pain perception, and considers physiological mechanisms which contribute to clinical pain by describing how the pain system changes its sensitivity depending upon the body's needs. The peripheral and central mechanisms contributing to sensitised nociceptive system are described with reference to the symptoms of clinical pain such as hyperalgesia, allodynia sopntaneous 'on-going'-projected and referred pain. It is suggested that in some chronic pain the nociceptive system maintains a state of sensitivity despite the absence of on-going tissue damage and under such circumstances the nociceptive system itself may have become dysfunctional. Such situations are often initiated by damage to nervous tissue which results in changes in the activity and organization of neuronal circuits within the central nervous system. The ability of the nociceptive system to operate in a suppressed state is also discussed with reference to pain modulation. The physical therapist can help facilitate the activation of these mechanisms through a combination of noninvasive modalities, functional activities, and the therapeutic use of self.

• 대한물리치료과학회지
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• 제9권4호
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• pp.105-112
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• 2002

When any damage or disease occurs, muscular strength and muscular endurance are lowered, and thus, if one is able to be restored from the damage or the disease, appropriate stimulus is required, since the muscles have to restore their proper functions. For such stimulus, the way of exercising and the way using electric stimulus are used in physical therapy. In order to examine the change in muscular strength, muscular endurance and girth of limbs for Biceps brachii, according to the lands of stimulus, in this article a total of 42 healthy male and female adults in their twenties were randomly sampled, and a series of tests were conducted for 6 weeks, for 15 minutes per once, 3 times per week, respectively, dividing them into the group for RUS(Russian Current Stimulation), PRE(Progressive Resistive Exercise) and P+R(RUS + PRE). The findings showed that the change in muscular strength was most significant as for the group for P+R, since it increased from $62.12{\pm}25.30$ before experiment to $95.78{\pm}34.07$ after 6 weeks: the change in muscular endurance was most significant as for the group for P+R, since it increased from $17.57{\pm}6.63$ to $42.86{\pm}10.24$; and the change in the girth of limbs was slightly significant only in the group for P+R, and the remaining two groups showed no significance.

• Nuclear Engineering and Technology
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• 제56권8호
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• pp.3236-3241
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• 2024

Ion cyclotron resonance heating (ICRH) is an important auxiliary heating method applied to the China Fusion Engineering Test Reactor, which can effectively heat the ions and electrons in plasma. Owing to the harsh nuclear environment, neutronic analyses are required to verify tritium self-sufficiency and neutron-shielding requirements. In this study, a neutronics analysis of the ICRH antenna was conducted using the COre and System integrated engine for Reactor Monte Carlo (cosRMC) code to estimate the neutron flux, radiation damage, nuclear heating, gas generation rate of key components, and tritium breeding ratio (TBR), providing data support for the subsequent optimization of the shielding design. In addition, the neutron flux of the coils around the antenna was calculated to prevent the entry of neutrons that damage the magnetic field coils through the gaps between the port plugs and antenna, and the shielding effects of the port-plug antenna on the surrounding components were analyzed. Finally, the results obtained using the cosRMC and MCNP codes were compared, which and presented good agreement, thus verifying the reliability of the neutronic analysis using the cosRMC code.

• 보존과학회지
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• 제31권3호
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• pp.287-298
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• 2015

포름알데히드의 금속 손상은 보편적으로 알려진 것에 비해 손상농도와 손상정도의 정량화는 명확하지 않다. 본 연구는 금속시편(은, 구리, 철, 납, 황동)을 대상으로 가스부식시험기를 이용하여 포름알데히드 0.5, 1, 10, 100, 500ppm 농도에서의 손상, 손상농도에서 온 습도 조건에 따른 손상 가중, 손상농도에서 열화금속시편의 손상을 광학적, 화학적, 물리적 측정방법으로 평가하였다. 이 결과, 포름알데히드 농도 500ppm/day에서 납시편의 광학적, 화학적, 물리적 손상과 전체금속시편의 광학적 손상이 확인되었다. 기본조건($25^{\circ}C$, 50%), 고온조건($30^{\circ}C$, 50%)에서는 일부시편의 광학적 손상이 가중되었고, 고온 고습조건($30^{\circ}C$, 80%), 고습조건($25^{\circ}C$, 80%)에서는 납시편의 화학적 손상이 각각 2.8배, 1.3배 가중되었다. 열화금속시편의 포름산이온 농도 결과, 철시편, 황동시편의 부식 생성물은 포름알데히드 가스와 활발히 반응하는 것으로 나타났으며, 납시편의 표면 산화막은 포름알데히드 가스와의 반응을 감소시키거나 차단하는 것으로 확인되었다.

• Computers and Concrete
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• 제7권4호
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• pp.365-386
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• 2010

This paper presents the physical formulation of a 1D material model suitable for seismic applications. It is written within the framework of thermodynamics with internal variables that is, especially, very efficient for the phenomenological representation of material behaviors at macroscale: those of the representative elementary volume. The model can reproduce the main characteristics observed for concrete, that is nonsymetric loading rate-dependent (viscoelasticity) behavior with appearance of permanent deformations and local hysteresis (continuum plasticity), stiffness degradation (continuum damage), cracking due to displacement localization (discrete plasticity or damage). The parameters have a clear physical meaning and can thus be easily identified. Although this point is not detailed in the paper, this material model is developed to be implemented in a finite element computer program. Therefore, for the benefit of the robustness of the numerical implementation, (i) linear state equations (no local iteration required) are defined whenever possible and (ii) the conditions in which the presented model can enter the generalized standard materials class - whose elements benefit from good global and local stability properties - are clearly established. To illustrate the capabilities of this model - among them for Earthquake Engineering applications - results of some numerical applications are presented.

• 대한원격탐사학회:학술대회논문집
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• 대한원격탐사학회 2008년도 춘계학술대회 논문집
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• pp.187-194
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• 2008

LiDAR는 일반 항공사진 및 위성영상과는 달리 사물의 높이를 측정할 수 있어 산림의 3차원 모델링을 수행할 수 있다. 본 연구에서는 이러한 LiDAR의 특성을 이용하여 산불이 발생한 강원도 양양지역 산림의 물리적 피해를 분석하였으며, 디지털 항공사진으로부터 Normalized Difference Vegetation Index (NDVI)를 추출하여 산림의 생물학적 피해를 분석하였다. 산림의 물리적 피해는 임관의 피해정도에 따라 지표면에서 반사되는 Point Data의 개수의 비율로서 추정을 하였다. 피해정도의 고저(高低)를 구분하는 기준은 통계적 방법 (Jenk's Natural Break) 으로부터 추정된 0.3594을 사용하였으며, 지표면 반사비율이 0.3594 이상인 경우 물리적 피해정도를 고(高, Serious Physical Damage; SPD), 지표면 반사비율이 0.3594 이하인 경우 물리적 피해정도를 저(低, Light Physical Damage; LPD)로 나타내었다. 또한 생물학적 피해는 일반적인 NDVI 값의 범위(-1

• Smart Structures and Systems
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• 제5권4호
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• pp.329-344
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• 2009

Ultrasonic chaotic excitations combined with sensor prediction algorithms have shown the ability to identify incipient damage (loss of preload) in a bolted joint. In this study we examine a physical experiment on a single-bolt aluminum lap joint as well as a three-dimensional physics-based simulation designed to model the behavior of guided ultrasonic waves through a similarly configured joint. A multiple bolt frame structure is also experimentally examined. In the physical experiment each signal is imparted to the structure through a macro-fiber composite (MFC) patch on one side of the lap joint and sensed using an equivalent MFC patch on the opposite side of the joint. The model applies the waveform via direct nodal displacement and 'senses' the resulting displacement using an average of the nodal strain over an area equivalent to the MFC patch. A novel statistical classification feature is developed from information theory concepts of cross-prediction and interdependence. This damage detection algorithm is used to evaluate multiple damage levels and locations.

• 콘크리트학회논문집
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• 제17권6호
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• pp.1053-1064
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• 2005

The mechanical damage of concrete is normally attributed to the formation of microcracks and their propagation and coalescence into macroscopic cracks. This physical degradation is caused from progressive and hierarchical damage of the microstructure due to debonding and slip along bimaterial interfaces at the mesoscale. Their growth and coalescence leads to initiation of hairline discrete cracks at the mesoscale. Eventually, single or multiple major discrete cracks develop at the macroscale. In this paper, from this conceptual model of mechanical damage in concrete, the computational efforts were made in order to characterize physical cracks and how to quantify the damage of concrete materials within the laws of thermodynamics with the aid of interface element in traditional finite element methodology. One dimensional effective traction/jump constitutive interface law is introduced in order to accommodate the normal opening and tangential slips on the interfaces between different materials(adhesion) or similar materials(cohesion) in two and three dimensional problems. Mode I failure and mixed mode failure of various geometries and boundary conditions are discussed in the sense of crack propagation and their spent of fracture energy under monotonic displacement control.

• 한국중재학회지:중재연구
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• 제27권4호
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• pp.199-222
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• 2017

Currently, many punitive damages (or statutory damages) and class action laws are discussed in relation to the consumer damage relief system. It is in the background of the argument that the introduction of such a victim relief system will solve many small and large consumer damages. There are many cases in which the punitive damages compensation or the class action system are introduced in relation to the food safety damage naturally. Although the introduction of such a system can clearly help the consumer to relieve large-scale damage, it can not solve all the problems at once because the company can reject the system despite the introduction of such a system. In particular, class action lawsuits should have the same type of damage, but most of the damage caused by food safety is accompanied by physical harm, resulting in various complications such as the physical characteristics of the victim, the health environment. The class action system may not provide a solution in that the content and type of the damage may be different. In this regard, this study aims to investigate the introduction of the food safety damage relief system through the introduction of an administrative dispute settlement system by an administrative agency that occupies an absolute position in the existing consumer protection from this point of view. In reality, the Food and Drug Administration, which is the largest among government agencies related to food, operates a passive attitude consumer protection system such as function like guidance, supervision and surveillance. And it is necessary to make a complementary proposal. In the current law, there is only a small part of the consumer protection work that is positively legal, and even after the damage is scientifically identified, it is not possible to present the solution to the damage suffered by the consumer through legislation. This is a fact that has been raised. In this paper, we propose a reasonable and rapid disaster relief procedure through a separate mechanism within the administrative agency, which is the administration agency, that the dispute settlement procedure due to food safety damage is insufficient by solving the case through the court through counseling, dispute adjustment and civil proceedings. In order to solve the problem of food insecurity and the food industry, various ways of rational solution of the problem were considered. The possibility of (1) Establishment of a food safety dispute resolution committee; (2) Establishment of a food safety disaster relief committee; and (3) Establishment of a food safety disaster relief committee was discussed. In addition, a plan for the creation of a food damage compensation fund was also proposed.