• Physical Therapy Rehabilitation Science
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• 제12권2호
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• pp.201-205
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• 2023

Objective: Resistance exercise is a necessary element to improve quality of life, and measurement and evaluation of muscle strength provide important information for prescription and management of rehabilitation and exercise programs. This study analyzed the correlation between direct and indirect 1RM for isokinetic maximum torque of the knee joint in order to provide useful information in the field of exercise programs. In addition, the flexion-extension ratio and the difference in left-right deviation were verified. Design: A cross-sectional study Methods: The subjects of this study were 33 healthy adult men and women without medical problems who participated in the health exercise class program at S University in Seoul. The correlation between isokinetic maximum torque and direct and indirect 1RM was analyzed, and a dependent t-test was performed to analyze the flexion-extension ratio and left-right deviation. Results: There was a high correlation between the isokinetic maximum torque and direct and indirect 1RM, and no statistically significant difference was shown between the test methods in the analysis of the flexion-extension ratio and left-right deviation. Conclusions: Isokinetic muscle function measuring equipment is expensive, so it is difficult to use it in local exercise rehabilitation and training sites. Through this study, it was found that direct and indirect 1RM isokinetic maximum torque showed a high correlation, and there was no difference in evaluating muscle function such as flexion-extension ratio and left-right deviation. Therefore, it is considered that the muscle function evaluation using 1RM in general field can be usefully utilized.

• 한국산학기술학회논문지
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• 제14권4호
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• pp.1849-1856
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• 2013

본 연구의 목적은 우리나라 재가 독거 여성노인의 우울 여부에 따른 인지기능, 도구적 일상생활 수행능력의 차이를 파악하고, 제 변수들 간의 상관관계를 확인하기 위함이다. 자료 수집은 2011년 4월부터 2012년 4월까지 구조화된 설문지로 면접 조사하였으며, 총 1,426명의 자료를 분석하였다. 제 변수들 간의 상관관계를 살펴본 결과, 우울과 인지기능(r=-.208, p<.001), 인지기능과 도구적 일상생활 수행능력(r=-.256, p<.001)은 약한 역상관관계를 보였고, 우울과 도구적 일상생활 수행능력(r=.222, p<.001)은 약한 순상관관계가 있는 것으로 나타났다. 이상의 연구 결과를 토대로 재가 독거 여성노인의 인지기능과 사회적 활동 수준의 향상을 통해 우울 수준이 저하될 수 있도록 앞으로 정신건강 유지 및 증진을 위한 방안 마련에 더욱 관심을 가져야 할 것이다.

• 한국방사선학회논문지
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• 제16권5호
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• pp.545-551
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• 2022

본 연구는 심박변이도(HRV) 신호를 통해 산출된 스트레스 측정치와 갑상선 기능 검사(TFT) 항목 간의 상관관계를 분석하였다. K 의원에 내원한 질병이 없는 건강한 성인 181명을 연구대상으로 하였다. 획득한 심박변이도(HRV) 신호를 이용하여 스트레스 저항도(SR)와 스트레스 지수(SI)를 산출하였으며 갑상선 기능검사(TFT) 항목으로는 TSH, Free T4, T3를 이용하였다. 측정된 값은 pearson 상관분석을 통해 각 항목 간의 관계를 통계 분석 하였다. 결과에서 Free T4와 스트레스 저항도(SR)는 양의 상관관계(r=0.18)를, 스트레스지수(SI)와는 음의 상관관계(r=-0.16)를 가졌음을 확인하였다. 이를 통해 갑상선 기능과 HRV 신호 간에 유의한 관계가 있음을 확인하였다.

• 대한통합의학회지
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• 제11권3호
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• pp.49-57
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• 2023

Purpose : This study aimed to systematically review the correlation between hand dexterity and cognitive function in the elderly, and summarize various evaluation tests and results analysis methods for manual dexterity tests applied to this population. Methods : We searched published studies in the Korean Studies Information Service System and PubMed databases from January 2013 to March 2023. The main keywords used were "dexterity," "fine motor," "elderly," "cognitive function," and "correlation." A total of 10 studies were selected for analysis from the 1,524 searched articles. The included studies consisted of a cohort study, a longitudinal study, and eight cross-sectional studies which were analyzed for patients, intervention, comparison, and outcomes. Results : Analyzing the qualitative level of 10 studies, 8 articles (80%) were non-randomized two-group studies that provided level II evidence whereas the remaining 2 studies (20%) were non-randomized single-group studies (level III evidence). Therefore, these results indicated that the level of evidence in this field is generally high. The Purdue pegboard test was the most commonly used evaluation test for manual dexterity, and velocity speed was the most frequently employed analysis method. Results indicated that there were significant differences in manual dexterity test between the normal elderly, those with mild cognitive impairment, or dementia. Conclusions : These results can be used as a basis for selecting dexterity test evaluation items and methods to analyze it in the elderly while screening for cognitive impairment. In addition, this study highlights potential areas for future research on the development of manual dexterity evaluation tools and techniques for analysis and the need for more reliable and valid methods for assessing cognitive function in the elderly.

• 대한물리의학회지
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• 제16권3호
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• pp.29-36
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• 2021

PURPOSE: The respiratory function and range of joint mobility deteriorate due to aging, respectively, and the respiratory function may be related to the range of joint mobility. To the best of the authors' knowledge, there has been little research on how the deterioration of the range of joint mobility caused by aging is related directly to the respiratory function. This study investigated the relationship between the respiratory function and the range of joint motion in the cervical and lumbar regions of older adults. METHODS: Thirty-two older adults participated in the study. The forced vital capacity (peak expiratory flow: PEF and forced expiratory volume in 1 second: FEV1) and the range of cervical joint motion were assessed in all subjects. The results were analyzed using the Pearson's correlation coefficient. RESULTS: The respiratory function moderately correlated with age. A moderate correlation was observed between FEV1 and right cervical lateral flexion. PEF was moderately correlated with the lumbar lateral flexion. In addition, FEV1 correlated strongly with lumbar lateral flexion. CONCLUSION: The respiratory function was correlated with the cervical and lumbar lateral flexion. Therefore, rehabilitation of the respiratory function should involve improving the limited range of motion of the joints, and a stretching program is needed for older adults.

• PNF and Movement
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• 제21권2호
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• pp.265-272
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• 2023

Purpose: The purpose of this study was to investigate tactile sense perception of the lower extremities according to physical function in children with spastic cerebral palsy. Methods: This study was conducted on 15 children diagnosed with spastic cerebral palsy. Physical function measurement items included dynamic balance ability, gross motor function level, and lower extremity ankle spasticity. The lower extremity tactile sensation uses a monofilament to measure the sole of the first metatarsal head, the sole of the fifth metatarsal head, the heel, the anterior part of the shin midway between the patella and the ankle joint, the kneecap, the upper anterior iliac spine, and the knee. A total of six measurements were taken in the mid-femoral region of the bone. Spearman correlation analysis was performed to determine the degree of body function and lower extremity tactile perception. Results: As the physical function of children with spastic cerebral palsy deteriorated, there was a decrease in tactile sensation in the thigh area corresponding to the proximal lower extremity. (p <.05). Conclusion: Children with spastic cerebral palsy and poor physical function have sensory loss not only in the distal part but also in the proximal part, so a treatment approach that recognizes and improves it is necessary.

• 구강회복응용과학지
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• 제34권4호
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• pp.253-261
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• 2018

목적: 이갈이와 편심위 유도양상 및 균형측 교합간섭과의 연관성에 대해 분석해 보고자 한다. 연구 재료 및 방법: 이갈이와 비이갈이군 및 성별에 따른 군기능 교합 및 균형측 교합간섭의 차이를 비교하고 편심위 유도 양상 및 이갈이와 균형측 교합간섭간의 상관성을 알아보기 위해 제3대구치를 제외한 상실치가 없는 26 - 37세 사이의 100명의 유치악 성인(이갈이군 39명, 비이갈이군 61명)을 대상으로 실험을 하였다. 디지털 교합분석장치 T-Scan system을 이용하여 최대교두감합위, 좌 우측방 편심위 운동을 측정하여 균형측 교합접촉의 유무를 판별하였으며 각 대상의 편심위 교합유도 양상에 대해서도 측정하였다. 디지털 교합분석 장치 검사 후 교합지를 이용하여 접촉되는 치아를 재확인 하였다. 결과: 군기능 교합이 이갈이군에서 61.5%, 비이갈이군에서 47.5%로 가장 높게 나타났다. 남자는 군기능 교합이 58.9%, 여자는 37.0%로 나타났다. 균형측 교합접촉은 전체 100명 중 48명에서 나타났고 이갈이군에서는 51.2%, 비이갈이군에서는 46%였다. 통계적으로 이갈이와 균형측 교합접촉간의 유의성은 나타나지 않았다. 성별에 따른 균형측 교합접촉의 차이도 없었다. 결론: 이갈이와 균형측 교합 접촉간에는 상관관계가 없었다. 이갈이군에서 군기능 교합이 가장 높게 나타났다.

• 대한기계학회논문집A
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• 제30권7호
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• pp.787-793
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• 2006

Recently kriging model has been widely used in the DACE (Design and Analysis of Computer Experiment) because of prominent predictability of nonlinear response. Since DACE has no random or measurement errors contrast to physical experiment, space filling experimental design that distributes uniformly design points over whole design space should be employed as a sampling method. In this paper, we examine the maximum entropy experimental design that reveals the space filling strategy in which defines the maximum entropy based on Gaussian or exponential. The influence of these two correlation functions on space filling design and their model parameters are investigated. Based on the exploration of numerous numerical tests, enhanced maximum entropy design based on exponential correlation function is suggested.

• Steel and Composite Structures
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• 제11권2호
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• pp.115-130
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• 2011

Considering the randomness of material parameters in the laminated composite plate, a scheme of stochastic finite element method to analyze the displacement response variability is suggested. In the formulation we adopted the concept of the weighted integral where the random variable is defined as integration of stochastic field function multiplied by a deterministic function over a finite element. In general the elastic modulus of composite materials has distinct value along an individual axis. Accordingly, we need to assume 5 material parameters as random. The correlations between these random parameters are modeled by means of correlation functions, and the degree of correlation is defined in terms of correlation coefficients. For the verification of the proposed scheme, we employ an independent analysis of Monte Carlo simulation with which statistical results can be obtained. Comparison is made between the proposed scheme and Monte Carlo simulation.

• Korean Chemical Engineering Research
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• 제53권6호
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• pp.814-817
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• 2015

A new ionic mass transfer correlation is derived for the fluid-saturated, horizontal porous layer. Darcy-Forchheimer model is used to explain characteristics of fluid motion. Based on the microscales of turbulence a backbone mass transfer relation is derived as a function of the Darcy-Rayleigh number, $Ra_D$ and the porous medium Schmidt number, $Sc_p$. For the Darcy's limit of $Sc_p{\gg}Ra_D$, the Sherwood number, Sh is a function of $Ra_D$ only. However, for the region of high $Ra_D$, Sh can be related with $Ra_DSc_p$. Based on the present backbone equation and the electrochemical mass transfer experiments which are electro plating or electroless plating, the new ionic mass transfer correlation is suggested in the porous media.