기능적 인지의 작업치료 임상 적용 필요성

권재성 ( Kwon Jae Sung ) 대한인지재활학회 2021 대한인지재활학회지 Vol.10 No.1

본 연구의 목적은 작업치료 임상에 기능적 인지(functional cognition)의 개념을 소개하고 기능적 인지의 출현 과정을 작업치료의 역사적인 맥락과 인지 개념의 변화 과정을 토대로 설명하기 위함이었다. 또한 기능적 인지에 대한 작업치료 임상 모델들의 관점을 조망해 보고 기능적 인지의 작업치료 임상 적용 필요성을 설명하고자 하였다. 기능적 인지는 역사적으로는 전인적이고 작업 중심적인 통합주의에 기반하고 개념적으로는 상황인지의 영향을 받았다. 기능적 인지는 새로운 이론이 아니라 작업치료 영역에서 연구된 이론과 전문적 경험에 의하여 축적된 지식의 조합이다. 기능적 인지의 개념에는 다양한 작업치료 인지재활의 임상 모델과 이론의 틀이 포함된다. 기능적 인지는 인간 작업의 관점에서 통합적인 인지를 설명하고 있다는 측면에서 가장 작업치료다운 인지의 개념이다. 작업치료사는 기능적 인지 개념을 통하여 인지재활 현장에서 실제적인 작업을 통해 인지를 평가하고 클라이언트(환자) 중심의 개별적인 중재를 시행할 수 있다. 기능적 인지는 지금도 진화하고 있다. 그러므로 기능적 인지는 인지재활 전문가인 작업치료사들에 의해 지속적으로 연구되고 발전되어야 할 것이다. The aim of this study was to introduce the concept of functional cognition to the clinical field of occupational therapy and to explain the process up to the appearance of functional cognition based on the historical context of occupational therapy and the process of changing cognitive concepts. In addition, it was attempted to examine the perspectives of occupational therapy clinical models for functional cognition and to explain the necessity of clinical application of functional cognition in occupational therapy. Functional cognition is historically based on holistic and occupation-based integrationism and conceptually influenced by situated cognition. Functional cognition is not a new theory, but a combination of occupational therapy theory and knowledge accumulated by professional experience. The concept of functional cognition includes various clinical models and frame of references of cognitive rehabilitation in occupational therapy. Functional cognition is the most occupational therapy-like concept of cognition in that it describes integrative cognition from the perspective of human occupation. Occupational therapists can evaluate real tasks in daily life through functional cognitive concepts and implement client-centered intervention in cognitive rehabilitation. Functional cognition is still constantly evolving. Therefore, functional cognition should be continuously studied and developed by occupational therapists who are experts in cognitive rehabilitation.

미세유동 칩에 배열된 원형 포스트가 전기 역학 및 유전 영동 유동에 미치는 영향

권재성(Jae-Sung Kwon),맹주성(Joo-Sung Maeng),김태호(Tae-Ho Kim),송호성(Ho-Sung Song),송시몬(Simon Song) 한국유체기계학회 2006 유체기계 연구개발 발표회 논문집 Vol.- No.-

Microfluidic chips are frequently used for the automation and miniaturization of the analytic processes of bio molecules such as DNA or proteins. Among physical phenomena occurred on a microfluidic chip, electrokinesis and dielectrophoresis are paid attention to as means to transport and control the bio molecules. To effectively utilize electrokinesis and dielectrophoresis, it is important to design the shape of a microchannel on a microfluidic chip. We investigate the effects of microchannel geometry with circular posts on electrokinesis and dielectrophoresis, and determine a microchannel geometry suitable for the clean-up or separation of bio molecules. In addition, we examine forces on particles exerted by electrokinesis and dielectrophoresis for various post diameters and spacings using an in-house CFD code. As a result, an optimal shape of a microchannel is suggested that is suitable for separating bio molecules with different surface charges.

국내 치매 노인을 위한 인지중재활동의 효과: 메타분석

권재성 ( Jae Sung Kwon ) 한국보건정보통계학회(구 한국보건통계학회) 2019 보건정보통계학회지 Vol.44 No.3

Objectives: The purpose of this meta-analysis was to investigate the effects of cognitive intervention activities (CIAs) for the elderly with dementia in Korea. We had searched for articles related to cognitive intervention for dementia over the past decade. Methods: The studies were searched through domestic search engine such as Earticle, KISS, Kyoboscholar, NDSL and RISS. The PEDro scale was used to assess the quality of the studies. The meta-analysis was implemented to analyze statistical values such as the number of samples, mean and standard deviation. Results: Nine papers were carefully selected for meta-analysis. The PEDro scales of analyzed studies were 4-5 points. The total number of subjects in identified studies was 336. We classified the dependent variables into mental function (MF) and activity and participation (A&P) based on the International Classification of Functioning, Disability and Health to compute effect sizes. The effect size of MF was 0.464 and the effect size of A&P was 0.422, both of which were “medium effect sizes”. Conclusions: The medium effect sizes for CIAs are clinically acceptable. However, it should be considered that dementia is a degenerative disease. And well designed and high quality research should be implemented continuously.

마이크로 채널내의 전기 역학 및 유전 영동 현상에 대한 수치 해석

권재성(Jae-sung Kwon),맹주성(Joo-sung Maeng),송시몬(Simon Song) 대한기계학회 2005 대한기계학회 춘추학술대회 Vol.2005 No.5

Electrokinesis and dielectrophoresis are two technologically important transport phenomena produced by an external electric field applied to a conductive fluid. Electrokinesis including electroosmosis and electrophoresis is transports of particle or fluid with net mobile charges and is caused by the external electric field. In contrast, dielectrophoresis is particle motions caused by an electric field gradient on an induced dipole moment of the particle and the surrounding fluid. Numerical analyses are conducted to predict the particle and fluid motions under an external electric fields in microchannels made of glass. Results provide insights into electrokinetic and dielectrophoretic behaviors of the particles and fluids and enable to optimize microchannel designs of biochips for biochemical analysis.

작업치료 이론에 기반한 기능적 인지 개념 분석

권재성 ( Kwon Jae Sung ) 대한인지재활학회 2023 대한인지재활학회지 Vol.12 No.1

본 연구의 목적은 문헌고찰을 통해 기능적 인지의 개념을 다양한 작업치료 임상모델 및 이론의틀(frame of reference; FOR)에 근거하여 분석하고, 인지재활을 위한 근거기반임상으로 제시하고자 하였다. 분석을 위하여, 기능적 인지의 개념을 5가지 영역으로 범주화하였고, 분류된 각 영역의 개념을 인지재활과 관련성이 깊은 작업치료 임상모델 및 FOR의 개념과 비교하였다. 분석을 위해 선택된 임상모델 및 FOR은 인간작업모델과 인지장애모델, 역동적상호작용모델, Cognitive Orientation to daily Occupational Performance 모델, 신경기능접근, 재활·보상모델, 다중상황접근이었다. 본 문헌고찰은 기능적 인지 개념이 작업치료 이론에 기반한 과학적 근거임을 밝히고 인지재활의 근거기반임상을 실현할 수 있는 지식체계임을 강조하였다는 점에서 임상적인 의미가 있다. 작업치료사들이 기능적 인지의 개념을 임상에 적극적으로 도입한다면 인지재활의 전문성을 강화할 수 있고 작업치료다운 인지재활을 실현할 수 있을 것이다. The aim of this study was to analyze the concept of functional cognition based on various clinical models (CMs) and the frame of reference (FOR) of occupational therapy through a literature review, and to present it as an evidence-based practice (EBP) for cognitive rehabilitation. For analysis, the concept of functional cognition was categorized into 5 domains, and the concept of each classified domain was compared with the concept of CMs and FORs of occupational therapy, which are closely related to cognitive rehabilitation. The CMs and FORs selected for analysis were the model of human occupation, the cognitive disabilities model, the dynamic interactional model, the cognitive orientation to daily occupational performance model, the neurofunctional approach, the rehabilitative/compensatory model, and multicontext approach. This literature review has clinical significance in that it reveals that the concept of functional cognition has a scientific evidence based on occupational therapy theory and emphasizes that it can be used as an EBP for cognitive rehabilitation. If occupational therapists actively apply the concept of functional cognition to clinical practice, they will be able to strengthen their expertise in cognitive rehabilitation and realize cognitive rehabilitation worthy of the occupational therapy.

샘플 전처리 성능 향상을 위한 원형 포스트가 배열된 마이크로 채널의 최적화

권재성(Jae-Sung Kwon),안윤호(Yun-Ho An),맹주성(Joo-Sung Maeng),송시몬(Simon Song) 대한기계학회 2006 대한기계학회 춘추학술대회 Vol.2006 No.11

Microfluidic chips are frequently used for the automation and miniaturization of the analytic processes of bio molecules such as DNA or proteins. Among physical phenomena occurred on a microfluidic chip, electrokinesis and dielectrophoresis are paid attention to as means to transport and control the bio molecules. To effectively utilize electrokinesis and dielectrophoresis, it is important to design the shape of a microchannel on a microfluidic chip. We investigate the effects of microchannel geometry with circular posts on electrokinesis and dielectrophoresis, and determine a microchannel geometry suitable for the clean-up or separation of bio molecules. In addition, we examine forces on particles exerted by electrokinesis and dielectrophoresis for various post diameters and spacings using an in-house CFD code. As a result, an optimal shape of a microchannel is suggested that is suitable for separating bio molecules with different surface charges.

치매 인지재활에서 과정기억 기반 활동의 임상 적용 필요성

권재성 ( Kwon Jae-sung ) 대한인지재활학회 2018 대한인지재활학회지 Vol.7 No.1

본 연구의 목적은 치매 인지재활 현장에서 치매 노인들에게 익숙하고 친숙한 과정기억 기반 활동을 적용해야 할 필요성을 제시하기 위함이었다. 작업치료사는 의미 있는 작업을 치료적 도구로 사용하는 전문가이다. 본 문헌 고찰은 치매 인지재활에 관여하는 작업치료사들에게 다음과 같은 치료적 전략을 제시하였다. 첫 번째는 치료적 활동이 치매 노인들에게 질적으로 의미 있는 활동이어야 한다는 것이다. 의미 있는 활동은 친숙하고 사회적 관계를 형성할 수 있으며 가르치는 역할이 있는 활동이다. 두 번째는 과정기억 기반의 익숙한 활동을 통해 노인들의 참여를 극대화하는 것이다. 마지막으로는 작업치료사가 활동에 참여하는 치매 노인들의 경험을 질적으로 관찰하고 평가해야 한다는 것이다. 이와 같은 문헌 연구의 시도가 작업치료 현장에서 치매 인지재활의 방향성을 제시하는데 도움이 되었기를 바란다. The purpose of this study was to suggest the necessity of applying procedural memory-based activities to the elderly with dementia in cognitive rehabilitation. This literature review presented the following therapeutic strategies for occupational therapists who use meaningful occupation as a therapeutic tools. The first, activities for the elderly with dementia should be meaningful qualitatively. Meaningful activities are familiar and have social relations and teaching roles. The second is to maximize the participation of elderly people through familiar activities based on procedural memory. Finally, occupational therapists should qualitatively observe and evaluate the experience of the elderly with dementia engaged in activities.

로봇 중재가 뇌졸중 환자의 상지기능에 미치는 영향: 무작위대조연구에 대한 메타분석

권재성 ( Jae-sung Kwon ) 한국보건정보통계학회(구 한국보건통계학회) 2018 보건정보통계학회지 Vol.43 No.1

Objectives: The main symptom of stroke is upper limb function deficit. Robotic intervention has been applied to treat the paretic upper limb. Through this meta-analysis, we investigated the effect of robotic intervention on upper limb function recovery of individuals with stroke. Methods: The analyzed studies were identified through electronic search engines such as PubMed, CINAHL, MEDLINE for the last 5 years. The PEDro scale was used to rate the methodological quality of included studies. Meta-analysis is performed to analyze the sample size, means, and standard deviations in selected studies. Results: Ten randomized controlled trails were included for meta-analysis. PEDro scale was more than 6 points in all studies. Three hundred twenty subjects participated in included studies. In order to statistically analyze the effect size of the robotic interventions, the outcomes of studies were classified into upper limb function (ULF) and activities of daily living (ADL). In consideration of heterogeneity of effect size, we used random effect model. Meta-analysis of 10 trials showed “small effect size”. The effect size of ULF was 0.288 and the effect size of ADL was 0.265. Conclusions: Robotic intervention was not more effective than other dose-matching conventional therapies. Therefore, it is necessary to select appropriate individual interventions reflect characteristics of the individuals with stroke and robotic interventions may be used as a complementary methods to conventional therapy.

포스트가 배열된 마이크로 채널 내 전기 역학 및 유전 영동 흐름에 대한 수치 연구

권재성(Jae-sung Kwon),맹주성(Joo-sung Maeng),송시몬(Simon Song) 대한기계학회 2005 대한기계학회 춘추학술대회 Vol.2005 No.11

본 논문은 마이크로 채널 내의 전기 역학 및 유전 영동 현상을 수치적으로 분석하였다. 이를 위하여 원형 post가 배열된 마이크로 채널 내에 직류 전기장을 걸어주고 두 현상을 수치적으로 해석하였다. 외부 전기장에 의해 마이크로 채널내에 전기 역학 및 유전 영동 현상이 발생할 때 전기장의 세기에 따라 세 가지 형태의 입자 움직임이 나타난다. 낮은 전기장 세기에서는 전기 역학이, 높은 전기장 세기에서는 유전 영동이 지배적으로 입자의 움직임에 영향을 준다. 그 중간세기의 전기장에서는 streaming 유전영동 현상이 관찰된다. 이 연구는 현재 진행중인 연구로서 앞으로는 전기장에 대한 post 배열 각도와 post 형상을 달리하여 전기 역학과 유전 영동 현상의 변화를 연구하고, 이를 바탕으로 칩위에서 바이오샘플을 분리, 정제, 추출할 수 있는 샘플 전처리기술을 개발하고자 한다. 또한 칩 설계에 최적화 기술을 도입하여 바이오칩 성능을 획기적으로 향상시킬 것이다. We predict electrokinetic and dielectrophoretic flows in microchannels with a uniform post array. Computational studies are performed to determine velocity of particles suspending in a fluid driven by electrokinesis and dielectrophoresis in the channel. Monte-Carlo simulations are also conducted to visualize the particle motions. At low applied electric fields, electrokinesis is the dominant transport mechanism. At moderate applied fields, dielectrophoresis are in balance with electrokinesis and diffusion to produce flowing filaments of concentrated and rarefied particles in the microchannels. At high applied fields, dielectrophoresis overwhelms, and locally traps particles. The results provide useful insight for optimizing design parameters of a microfluidic chip to carry out on-chip sample pretreatment using electrokinetic and dielectrophoretic effects.

지역냉방을 위한 아이스슬러리의 연속제조 및 배관내 빙충전율 조절

권재성(Jae-Sung Kwon),이윤표(Yoon Pyo Lee),이상훈(Sang Hoon Lee),유호선(Hoseon Yoo),윤석만(Seok-Mann Yoon) 대한설비공학회 2008 설비공학 논문집 Vol.20 No.12

The ice slurry maker which can produce the ice slurry well for the ice particle in-flowing condition was revised. We removed the stagnant region at the top of the ice slurry maker, and IPF 40% could be realized. The IPF controller with 6㎜ diameter holes at the bottom was designed. But the IPF controller with only 6㎜ diameter holes could not control IPF in a pipe. This is because the ice particles at ice slurry flow exist homogeneously not only at the upper part but also at the bottom part. We changed the hole size of IPF controller surface using fine meshes and then, IPF in a pipe was increased by 70% when the hole size was 80㎛ and less.