• Title/Summary/Keyword: Physical process

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Physical Properties of ITO/PVDF as a function of Oxygen Partial Pressure (산소 분압 조절에 따른 ITO/PVDF 박막 물성 조절 연구)

  • Le, Sang-Yub;Kim, Ji-Hwan;Park, Dong-Hee;Byun, Dong-Jin;Choi, Won-Kook
    • Journal of the Korean Institute of Electrical and Electronic Material Engineers
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    • v.21 no.10
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    • pp.923-929
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    • 2008
  • On the piezoelectric polymer, PVDF (poly vinylidene fluoride), the transparent conducting oxide (TCO) electrode material thin film was deposited by roll to roll sputtering process mentioned as a mass product-friendly process for display application. The deposition method for ITO Indium Tin Oxides) as our TCO was DC magnetron sputtering optimized for polymer substrate with the low process temperature. As a result, a high transparent and good conductive ITO/PVDF film was prepared. During the process, especially, the gas mixture ratio of Ar and Oxygen was concluded as an important factor for determining the film's physical properties. There were the optimum ranges for process conditions of mixture gas ratio for ITO/PVDF From these results, the doping mechanism between the oxygen atom and the metal element, Indium or Tin was highly influenced by oxygen partial pressure condition during the deposition process at ambient temperature, which gives the conductivity to oxide electrode, as generally accepted. With our studies, the process windows of TCO for display and other application can be expected.

Analysis of the Physical Properties of the Conductive Paste according to the Type of Binder Resin and Simulation of Mechanical Properties according to Ag Flake Volume Fraction (바인더 수지 종류에 따른 도전성 페이스트의 물성 분석 및 Ag flake 부피 분율에 따른 기계적 특성 시뮬레이션 연구)

  • Sim, Ji-Hyun;Yun, Hyeon-Seong;Yu, Seong-Hun;Park, Jong-Su;Jeon, Seong-Min;Bae, Jin-Seok
    • Composites Research
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    • v.35 no.2
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    • pp.69-74
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    • 2022
  • In this study, the conductive paste used in a wide range such as wiring in the electronic packaging field, the automobile industry, and electronic products is manufactured under various process conditions due to the simplicity of the process, and then the thermal, mechanical, and electrical characteristics are analyzed and simulation studies are conducted to optimize the process. to establish the conditions of the conductive paste manufacturing process. First, a conductive paste was prepared by setting various types of binder resin, an essential component of the conductive paste, and characteristics such as thermal conductivity, tensile strength, and elongation were analyzed. Among the binder resins, the conductive paste applied with a flexible epoxy material had the best physical properties, and a simulation study was conducted based on the physical property data base of the conductive face. As a result of the simulation, the best physical properties were exhibited when the Ag flake volume fraction was 60%.

The Effect of Mobilization Combined with Shoulder Active Contraction of Depth between the Coracoid Process and Humeral Head (어깨의 능동 수축을 동반한 관절가동술이 부리돌기와 위팔뼈 머리 사이의 거리에 미치는 영향)

  • Sun-min Kim;Sang-hun Jang
    • The Journal of Korean Academy of Orthopedic Manual Physical Therapy
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    • v.29 no.2
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    • pp.69-75
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    • 2023
  • Purpose: This study examined the distance between the coracoid process and the humeral head using an ultrasonography device when shoulder active contraction were applied according to the guided direction in the end range of shoulder mobilization. This study aims to provide essential data on treating shoulder disease patients. Methods: The subjects of this study were 20 adults with healthy shoulder joints. ultrasonography (US) equipment was used to examine shoulder joint mobilization under two conditions: (1) anteroposterior (AP) joint mobilization and (2) superoinferior (SI) joint mobilization. Shoulder active contraction was assessed in the end range. The distance between the coracoid process and the humeral head was measured. A linear probe was used for US; the frequency was set to 7.5MHz, and the US image display method was set to B-mode. The US measurement values were measured in (1) the starting position, (2) the end range position, and (3) the end range position of the shoulder active contraction, and the moving distance was drawn in a straight line through the US image. The distance was determined as the measurement value, and the average values were compared. Reults: The results were as follows: (1) the measured AP Joint mobilization increased by an average of .52cm from the end range of the joint mobilization with shoulder active contraction; (2) the measured SI Joint mobilization increased by an average of .49cm from the end range of the joint. Conclusion: When shoulder mobilization is applied, the distance between the coracoid process and the humeral head increases when muscle contraction occurs through shoulder active contraction in the end range, according to the therapist's guidance. Therefore, shoulder mobilization combined with shoulder active contraction is an effective treatment method for patients with shoulder injuries.

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Motor Learning Process of Halliwick 10 Point Program (Halliwick 10 Point Program의 운동학습과정)

  • Seo, Sam-Ki;Kim, Tae-Youl;Hwang, Tae-Yeun
    • The Journal of Korean Physical Therapy
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    • v.14 no.1
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    • pp.159-167
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    • 2002
  • The Halliwick concept was developed by James McMillan over 50 years ago, and began as a method for teaching swimming to children with physical disables. After that the Halliwcik concept was developed as a specific strategy(called the Ten-Point Program) for teaching swimming to children with disabilities. Soon after the changes in the physical and emotional behavior were attributed to a unique teaching/learning philosophy and a psycho-sensory-motor learning program that is enhanced by hydrodynamics. Recognizing the therapeutic effects of the Ten-Pont Program adapted the program as a therapeutic intervention called Water Specific Therapy or the Logic Approach to Therapy in Water.

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Cross-cultural Adaptation of Korean Questionaires for Self-Report and Physical Performance Measures for Patients with Osteoarthritis of the Knee (퇴행성 슬관절염 환자의 자가평가와 신체기능 측정을 위한 한국어 도구개발)

  • Ahn, So-Youn;Lee, Ji-Hyun;Busch, Angela;Schachter, Candice;Peloso, Paul
    • The Journal of Korean Physical Therapy
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    • v.14 no.1
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    • pp.205-217
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    • 2002
  • We performed the cross-cultural adaptation process directed at the translation into Korean of the Pain Visual Analogue Scale, the Self-Report of Improvement and the Beacke Physical Activity Questionnaire for Older Adults. This project will help ensure that the Korean versions of these measures retain their meaning and measurement properties when applied to the Korean language and culture. This will help reduce measurement error in the RCT. This research should be of value to other researchers who wish to study older adults with rheumatological conditions.

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A Study on the Device of the Family Program for Children with Disability (지체장애아의 가족중심 중재 프로그램 고안에 관한 연구)

  • Shin, Hong-Cheul;Kim, Woong-Gak;Kang, Jeong-Il
    • Journal of Korean Physical Therapy Science
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    • v.8 no.2
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    • pp.953-960
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    • 2001
  • This study is approached the early intervention of children with disability in the aspect of family. The family of didabled children are identified as special individual with responsibilities and roles beyond those of other family. Physical Therapy need of the disabled child should be sought in the context of the family and socio-cultural environment. The process of early developmental facilitation is defined as a approach of the family. As family is the most influential factor in the child developmental facilitation, treatment and education. The family tend to seek complete information about disabilities, desire accurate, straight foreward about their child.

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Commitment to Sport and Exercise: Re-examining the Literature for a Practical and Parsimonious Model

  • Williams, Lavon
    • Journal of Preventive Medicine and Public Health
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    • v.46 no.sup1
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    • pp.35-42
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    • 2013
  • A commitment to physical activity is necessary for personal health, and is a primary goal of physical activity practitioners. Effective practitioners rely on theory and research as a guide to best practices. Thus, sound theory, which is both practical and parsimonious, is a key to effective practice. The purpose of this paper is to review the literature in search of such a theory - one that applies to and explains commitment to physical activity in the form of sport and exercise for youths and adults. The Sport Commitment Model has been commonly used to study commitment to sport and has more recently been applied to the exercise context. In this paper, research using the Sport Commitment Model is reviewed relative to its utility in both the sport and exercise contexts. Through this process, the relevance of the Investment Model for study of physical activity commitment emerged, and a more parsimonious framework for studying of commitment to physical activity is suggested. Lastly, links between the models of commitment and individuals' participation motives in physical activity are suggested and practical implications forwarded.

Evidence-Based Practice in Neurological Physical Therapy (1) -Applying EBP to Clinical Decision Making- (신경계물리치료에서의 근거중심실기(1) -임상의사결정과정에 EBP 적용하기-)

  • Lee, Moon-Kyu;Lim, Jae-Heon;Kim, Tae-Yoon
    • PNF and Movement
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    • v.14 no.3
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    • pp.157-176
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    • 2016
  • Purpose: The purpose of this study was to share an experience about processes and lessons learned to execute evidence-based practice (EBP) in neurological physical therapy. Methods: The most important thing in applying EBP to practice is to search, find, and appraise the existing evidence. Many evidence databases are available, such as CENTRAL, PEDro, PUBMED, and EMBASE. However, the knowledge represented in these databases is not always perfect. The practice model is a set of processes to resolve client problems. Therapists should make hypothesis-focused decisions through EBP. Integrating clinical reasoning and evidence is most important when it comes to the execution of EBP. Results: The process of EBP consisted of following: coming up with clinical questions, followed by searching for, appraising, evaluating, and integrating evidence. To integrate EBP into practice, it is necessary to consider clinical expertise, patient value and preferences, as well as research wth the best evidence. We provided an example of a clinical case with a stroke patient to show how this process and framework concerning clinical reasoning through evidences can be integrateds. During this process, we also utilized information technology to improve EBP ability. Conclusion: We should recognize what manner of information is needed to resolve eash patient's problem, and we should search for this information efficiently. Then, we should judge the value of the information obtained as it applies, to the clinical setting.

A Study on the Physical Properties of Silk Fabrics - Bending and Luster Properties - (견직물(絹織物)의 물리적(物理的) 특성(特性) 변화(變化)에 대(對)한 연구(硏究) - 굽힘 및 광택(光澤) 특성(特性)-)

  • Park, Shin-Jung;Kim, Jong-Jun;Jeon, Dong-Won
    • Journal of Fashion Business
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    • v.8 no.5
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    • pp.31-40
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    • 2004
  • The purpose of this study is to investigate the change of the physical properties, bending and luster properties, which are related to the touch and appearance of silk fabrics modified by the degumming process. The silk has long been known as one of the most elegant and soft textile materials. The raw silk yarn, or cocoon bave, spun from the spinneret, is rather stiff due to the sericin covering the two fibroins together. The sericin can be removed during a degumming process. The removal of the sericin would result in remarkable change in the physical properties of the raw silk fabrics, including luster of the fabrics, which process parameters could possibly be utilized to adequately control the silk fabric properties. The KES(Kawabata Evaluation System) is a testing methodology that has been used with considerable success for predicting the hand and tailorability of apparel fabrics. This study uses one of the KES, bending tester, to measure the bending properties of the silk fabrics degummed for specified period to change the physical/mechanical properties of the fabric. The KES bending measurement revealed that the bending rigidity decreased for both the warp and weft direction of the silk fabrics with the increase of the degumming period. It has been shown in this study that the some of the hand-related physical properties, including the bending rigidity, drapability, and luster, could be modified with the change in the degumming period.

A Linear Reservoir Model with Kslman Filter in River Basin (Kalman Filter 이론에 의한 하천유역의 선형저수지 모델)

  • 이영화
    • Journal of Environmental Science International
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    • v.3 no.4
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    • pp.349-356
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    • 1994
  • The purpose of this study is to develop a linear reservoir model with Kalman filter using Kalman filter theory which removes a physical uncertainty of :ainfall-runoff process. A linear reservoir model, which is the basic model of Kalman filter, is used to calculate runoff from rainfall in river basin. A linear reservoir model with Kalman filter is composed of a state-space model using a system model and a observation model. The state-vector of system model in linear. The average value of the ordinate of IUH for a linear reservoir model with Kalman filter is used as the initial value of state-vector. A .linear reservoir model with Kalman filter shows better results than those by linear reserevoir model, and decreases a physical uncertainty of rainfall-runoff process in river basin.

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