잠 못 이루는 여름밤의 단상

박재철 한국비정규노동센터 2018 비정규 노동 Vol.132 No.-

Effects of Blood Flow Restriction and Different Support Surfaces on the Thickness of Type-I Muscle Fibers in the Trunk

박재철,오승근,정진규 대한물리치료학회 2017 대한물리치료학회지 Vol.29 No.2

Purpose: This study was conducted to investigate the effects of blood flow restriction and different support surfaces for bridge exercises on the thickness of the transverse abdominis and multifidus, which are trunk-stabilizing muscles. Methods: The study’s subjects were 45 adults who were divided into three groups that performed bridge exercises over a six-week period on their respective support surfaces after blood flow restriction. Changes in the thickness of the subjects’ transverse abdominis and multifidus muscles were measured using ultrasonography before the experiment, then three and six weeks after the experiment. The changes in each variable over time were analyzed using a repeated-measures analysis of variance (ANOVA). Results: The transverse abdominis showed significant differences in muscle thickness with regard to time and the interaction between time and each group (p<0.05), but no significant differences with regard to changes among groups (p>0.05). The multifidus showed significant differences in muscle thickness with regard to time, the interaction between time and each group, and changes between groups (p<0.05). Conclusion: Blood flow restriction and different support surfaces for bridge exercises led to significant differences in the thickness of the transverse abdominis and multifidus. This study’s results may be used as the basis for future studies and for rehabilitation in clinical practice.

지지면에 따른 안정화 운동이 근수행력에 미치는 영향

박재철,한종만,김용성,김용남 대한임상전기생리학회 2012 대한임상전기생리학회지 Vol.10 No.1

제 2형 당뇨병을 이용한 로지스틱과 베이지안 노모그램 구축 및 비교

박재철,김민호,이제영,Park, Jae-Cheol,Kim, Min-Ho,Lee, Jea-Young 한국통계학회 2018 응용통계연구 Vol.31 No.5

본 연구에서는 제 2형 당뇨(type 2 diabetes mellitus)의 발병 확률을 예측하기 위해 11가지 위험요인을 가지고 로지스틱 회귀모형과 순수 베이지안 분류기 모형에 적합시킨다. 그런 다음 이를 시각적으로 쉽게 이해하는데 도움을 주는 노모그램 구축 방법을 소개한다. 분석은 2013-2015년 6기 국민건강영양조사 데이터를 가지고 분석하였다. 또 로지스틱 회귀모형에 세 가지 상호작용 항을 넣어 분석의 질을 높이고자 하였고 베이지안 노모그램에 left-aligned 방법을 사용하여 비교하기 쉽게 만들었다. 최종적으로 두 노모그램을 비교하고 효용성을 알아보았다. 마지막으로 ROC 곡선을 이용하여 노모그램이 적절한지 검증하였다. In this study, we fit the logistic regression model and naïve Bayesian classifier model using 11 risk factors to predict the incidence rate probability for type 2 diabetes mellitus. We then introduce how to construct a nomogram that can help people visually understand it. We use data from the 2013-2015 Korean National Health and Nutrition Examination Survey (KNHANES). We take 3 interactions in the logistic regression model to improve the quality of the analysis and facilitate the application of the left-aligned method to the Bayesian nomogram. Finally, we compare the two nomograms and examine their utility. Then we verify the nomogram using the ROC curve.

바드라가즈 링 기법이 만성 뇌졸중 환자의 몸통 조절과 다리 근육의 근활성도에 미치는 효과

박재철,이동규 대한물리치료과학회 2023 대한물리치료과학회지 Vol.30 No.1

Background: The purpose of this study was to identify the effects of underwater and ground proprio- ceptive neuromuscular facilitation lower extremity pattern exercise on trunk control and lower extremity muscle activity of chronic stroke patients. Design: Pretest-posttest design: single blind. Methods: The subjects were 28 patients (experimental group, n=14 or control group, n=14) diagnosed with chronic stroke. The experimental group performed underwater proprioceptive neuromuscular facilitation lower extremity pattern exercise. The control group performed ground proprioceptive neuromuscular facilitation lower extremity pattern exercise. Training was conducted once a day for 30 minutes, five days per week for six. Trunk control was measured using the Trunk Impairment Scale. Lower extremity muscle activity was measured using surface electromyography. Results: As a result of comparison within groups, the experimental and control group showed significant difference for trunk control after the experiment (p<0.05). In comparison between two groups, the ex- perimental group showed more significant difference in trunk control than the control group (p<0.05). In comparison within groups, the experimental group showed significant difference for lower extremity muscle activity after the experiment (p<0.05). In comparison between two groups, the experimental group showed more significant difference in lower extremity muscle activity than the control group (p<0.05). Conclusion: Based on these results, underwater pro- prioceptive neuromuscular facilitation lower extremity pattern exercise effectively improved the trunk control and lower extremity muscle activity of chronic stroke patients.

한국 불교중흥을 위한 불교정보시스템 구축과 불교기반 지식인 역할

박재철 사단법인한국교수불자연합회 2022 한국교수불자연합학회지 Vol.28 No.1

In today's knowledge-based information society, the paradigm of individual life and social culture is rapidly changing. Moreover, the ecosystem of religious culture, including Buddhism, is also rapidly evolving, as the untact culture due to Corona is fixed and cyber culture is spreading due to the spread of the metaverse system. The establishment of a Buddhist information system for the revival of Buddhism in response to such environmental changes and the role of Buddhist-based intellectuals will be considered. Proposal to establish a Buddhist information system for research and preservation of vast Buddhist cultural resources, including the revitalization of Buddhist religion and protection of intellectual property rights related to Buddhist culture. do. 오늘날 인공지능과 사물인터넷(IoT, Internet Of Thing)등 IT(Information Technology)를 기반으로 지식 기반 정보화 사회(Knowledge Based Information Ooriented Ssociety)가 전개되고, 코로나와 메타버스 시스템(MetaVerse System) 확장으로 언택트 문화(Untacted Culture)가 형성되어 고착화하면서 사회문화의 패러다임이 급격하게 변화되고, 이에 따라 불교를 비롯한 종교 문화 생태계도 빠르게 진화하고 있다. 본고에서는 이러한 정보화 사회 특성을 반영한 불교 중흥방안을 고찰 하였다. 불교중흥이란 찬란한 불교문화 계승과 발전, 포교를 통한 불교신자 수 증가, 출가 수행자의 수행 환경 개선, 이미 불교를 신앙하는 불교도의 신앙 환경 개선, 우리 사회에 선한 영향력 확대 등을 포괄하여 고찰해야 된다. 이에 본 논문에서 오늘날 전개되는 지식정보 사회(Knowledge Based Information Oriented Society)특성을 고찰하고, 불교중흥을 위한 불교정보시스템(BIS, Buddhist Information System)의 구축 필요성과 바람직한 불교정보시스템 모델 개념을 제안 한다. 그리고 불교중흥을 위한 불교기반 지식인의 역할을 살펴보고 불교정보학회(BIS, Buddhist Information Association)창립과 불교문화진흥단(BCPT, Buddhist Culture Promotion Team) 구성을 제안한다. 본 논문에서 제안하는 불교정보시스템은 정보화 사회에서 불교문화 관련 지적소유권을 비롯한 불교문화자원의 보존, 보호, 연구, 축적, 활용과 불교신자와 불교기반 지식인 등 불교인적 자원을 통합적으로 관리할 수 있는 방대한 시스템이다. 이 시스템을 통해 불교문화 자원에 관한 학문적 고찰과 축적은 물론 불교를 포교하고 외연을 확대하기 위한 포교 전략 수립과 효율적인 신도 관리, 사찰 재정의 합리적 관리, 불교기반 문화재의 시스템적 관리, 지적소유권 관리를 통한 수익 모델을 창출하도록 하여 불교정보시스템이 불교중흥에 기여하도록 한다. 그리고 불교문화 자원에 관한 학문적 접근을 통한 불교중흥을 위해 불교기반 지식인들의 역할이 필요하며 이를 위해 (사)한국교수불자연합 중심의 불교정보학회(BIS, Buddhist Information Association)창립과 불교 관련 종단과 협업을 기반으로 불교중흥의 실천적 구현을 위해 불교문화진흥단(BCPT, Buddhist Culture Promotion Team) 설립의 필요성을 고찰 한다. 불교정보시스템 구축과 활용,불교정보학회와 불교문화진흥단 설립이 찬란한 불교문화 중흥에 기여될 수 있기를 바라며, 이를 위해 교불연 교수를 비롯한 불교기반 지식인들의 지혜로운 역할과 적극적 참여가 있어야 한다.

다중-셀 다중 안테나 직교 주파수분할 다중화 기반 브로드캐스트 전송 방식의 아웃티지 성능

박재철,송익호,김윤희 한국통신학회 2008 韓國通信學會論文誌 Vol.33 No.7

In this paper, we propose a multi-cell cooperation method for broadcast packet data services in the orthogonal frequency division multiplexing (OFDM)-based cellular system with multiple transmit antennas. In the proposed method, to transmit two streams of spatially demultiplexed or transmit diversity coded symbols over a number of transmit antennas, we divide a coded packet into multiple subparts to which different cell groups and antenna pairs are assigned. The proposed method enhances the diversity order by transforming the channel frequency responses of two symbol streams in each subpart of the broadcast packet. The increase in diversity of the proposed method is shown with the outage probability under various configurations. 이 논문에서는 기지국 송신 안테나가 둘 이상인 셀룰러 시스템에서 여러 기지국이 협력으로 직교 주파수분할 다중화 (orthogonal frequency division multiplexing: OFDM) 신호를 전달함으로써 브로드캐스트 서비스를 제공하는 방법을 제안한다. 제안한 방식은 셀들을 세 그룹으로 나누고 부반송파들을 여러 부분으로 나눈 뒤, 각 부반송파 부분마다 송신 다양성 부호화 또는 공간 다중화로 생성된 두 브로드캐스트 심볼 열을 서로 다른 셀 그룹과 송신 안테나 쌍으로 전달하는 것이다. 이 방법은 브로드캐스트 패킷을 구성하는 여러 부분에 대한 채널 주파수 응답 특성을 다르게 함으로써 부호화 다양성 차수를 증가시킨다. 제안한 방식의 성능 향상은 송신 안테나 수, 부분 수, 그리고 안테나 송신 방법 등의 다양한 조건 하에 정보 전송률에 대한 아웃티지 확률을 평가함으로써 확인하였다.

Effects of Knee Extension Exercise Using Blood Flow Restriction on the Thickness and Balance Ability of Tendons

박재철,김용남 대한물리치료학회 2018 대한물리치료학회지 Vol.30 No.2

Purpose: This study examined the effects of knee extension exercise using blood flow restriction on the changes in the thickness and static balance ability of the tendon of the rectus femoris muscle and achilles tendon. Methods: A total of 30 subjects was were divided into two groups of 15 subjects each. The changes in the thickness and balance of their tendons were measured by ultrasonography and balance equipment. The measurements were taken three times: before the experiment, 4 weeks after, and 8 weeks after. The results were analyzed by repeated measure ANOVA, one-way ANOVA was conducted in cases where there were time-to-group interactions in the intra-individual effects test. Results: Significant differences in the thickness of the tendon of the rectus femoris muscle and Achilles tendon were found between the groups, over time, and in the time-to-group interactions (p<0.05). The changes in balance in both feet when the supporting positions between eye-open and eye-closed states were significantly different in the time-to-group interactions (p<0.05), but were not different between the groups (p>0.05). Conclusion: Knee extension exercise using blood flow restriction leads to significant differences in the increase in tendon thickness and changes in balance, indicating that the results of this study can be utilized as basic data for future studies and for rehabilitation treatment at clinics.

Impact of Waist Stabilization Exercise with Blood Flow Restriction on White Area Index of Trunk Muscle Thickness Density

박재철,김용남 대한물리치료학회 2016 대한물리치료학회지 Vol.28 No.2

Purpose: In this study experiments were performed during 6 weeks with 40 adults, 20 subjects in the waist stabilization exercise with blood flow restriction group and 20 subjects in the waist stabilization exercise without blood flow restriction group, in order to determine the impact of waist stabilization exercise on White Area Index (WAI) followed by blood flow restriction. Methods: Thickness of external oblique abdominal muscle, internal oblique abdominal muscle, and transversus abdominis muscle, as well as density and WAI of external oblique abdominal muscle were measured, followed by performance of repeated ANOVA. Results: Significant difference in thickness of external oblique abdominal muscle according to periodical difference was observed between groups (p<0.05). Significant difference in thickness of internal oblique abdominal muscle and transversus abdominis muscle according to periodical difference was observed between groups (p<0.05). Significant difference in density and WAI of external oblique abdominal muscle according to periodical difference was observed between groups (p<0.05). Conclusion: In conclusion, significant difference was observed after waist stabilization exercise with blood flow restriction. These results can be used as basic data for future research on waist stabilization exercise and blood flow restriction exercise.

진동운동이 노인의 균형 조절 능력과 보행 능력 및 우울에 미치는 효과

박재철,이동규,Park, Jae-Cheol,Lee, Dong-Kyu 대한고유수용성신경근촉진법학회 2022 PNF and Movement Vol.20 No.1

Purpose: The aim of this study was to examine the effects of vibration exercise on balance control ability, gait ability, and depression in the elderly. Methods: A total of 24 elderly subjects were recruited and randomized into an experimental (n = 12) or a control (n = 12) group. The experimental group performed both a vibration and a stabilization exercise, and the control group performed a stabilization exercise alone. Balance ability was measured using the functional reach test (FRT), gait ability was measured using the timed up and go test (TUGT), and depression was measured using the Center for Epidemiologic Studies Depression Scale (CES-D). Results: The experimental and control groups showed significant differences for all pre- and post-experiment FRT, TUGT, and CES-D measurements (p <0.05). In a comparison between the two groups, the experimental group in which vibration exercise was applied showed more significant difference in FRT, TUGT, and CES-D than the control group (p <0.05). Conclusion: This study showed vibration exercise to be effective in balance control ability, gait ability, and depression in the elderly.