• Title/Summary/Keyword: Repeated measurement data

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Measurement of Cardiac Pulse Transit Time using Photoplethysmography Sensor (광전용적맥파 센서를 이용한 맥파전달시간의 측정)

  • Choi, Byeong-Cheol;Jung, Dong-Keun;Jeong, Do-Un;Ro, Jung-Hun;Jeon, Gye-Rok
    • Journal of Sensor Science and Technology
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    • v.13 no.5
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    • pp.383-391
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    • 2004
  • In this study, we implemented the pulse transit time (PTT) system to examine usefulness of the monitoring method of distensibility and elasticity using photoplethysmography sensor in vivo. PTT is defined as the time interval between the peak of QRS complex in ECG signal and the maximum slope point of photoplethysmography. these two signals were converted to digital data by means of AID converter, then PTT was evaluated by heartbeat using PC. Results of analysis were displayed as a graph using spline interpolation method. The variance of PTT was measured repetitiously to verify efficiency of PTT system in resting state and hyperemic state. Repeated measurement of PTT was not same value but showed that coefficients of correlation were related with each other as 0.8302 (P<0.01) in resting state. And also repeated measurement of PTT showed significant correlation as 0.868 (P<0.01) in the hyperemic state. These result showed that PTT is reflect on transient pressure variance in the artery and is very useful method for the evaluation of prognosis of the hypertension and arteriosclerosis.

The Effects of Cervical Traction on the Pain, Range of Motion and the Quality of Sleep of the Older Women with Tension Headache (목뼈 견인치료가 긴장성 두통을 가진 노인 여성의 통증, 관절가동범위 및 수면의 질에 미치는 영향)

  • Kim, Youngjung;Yoo, Byungkook
    • Journal of The Korean Society of Integrative Medicine
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    • v.2 no.1
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    • pp.51-62
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    • 2014
  • Purpose : The purpose of this work was to ascertain the effects of cervical traction on the pain, the range of motion and the quality of sleep of the older women with the tension headache. Method : 25 subjects between ages 66 and 82 who agreed on this experiment and diagnosed with tension headache participated in this study. All subjects were treated with air-pressure cervical traction while 20 minutes a day, 3 times per week, for 4 weeks. The effects of air-pressure cervical traction were evaluated by PSQI(Pittsburgh sleep quality index), a pain last a day, VAS, and four ROMs. In order to investigate the effect of age on the treatment, subjects were divided into two groups, of less and of over than age 75. The measured data were analyzed by using one-way repeated ANOVA and two-way repeated ANOVA. Result : 1) The group of less than age 75 showed the significant improvements in all measurement variables, PSQI, a pain last a day, VAS and four ROMs. 2) The group of over than age 75 showed the significant improvements in all measurement variables excluding the flexion ROM of cervical. 3) No significant differences between two groups were showed in all measurement variables, but the interaction effect between group and period was significant in only VAS. Conclusion : From the results of this study, a cervical traction intervention using an air-pressure cervical traction proved to be effective on the reduction of tension headache and the improvement of the quality of sleep.

Difference of Vital Capacity According to Cranio-Vertebral Angle and Posture Change of Forward Head Posture People (두부전방전위자세에서 두개척추각과 자세변화에 따른 폐활량의 차이)

  • Kim, Ji-Yeon;Park, Eun-Ji;Yu, Ji-Min;Lee, Myoung-Hee
    • Journal of Korean Physical Therapy Science
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    • v.25 no.1
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    • pp.44-51
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    • 2018
  • Background: In this paper, the relationship between the Cranio-Vertebral Angle (CVA) and the vital capacity in each position is reviewed, and the vital capacity in the position is studied. Methods: This study targeted 20 non-smoking female students of U university, which is located in Gyeongju-si. To review the Forward Head Posture (FHP) of each subject, CVA was measured, and FVC, FEV1, and FEF (25-75%) were measured and analyzed using a spirometer. Subjects were ordered to exhale three times with ease and then inhale up to their total lung capacity. After then, they were requested to exhale longer than six seconds. Then the inspiration and expiration were repeated. The measurement was executed in three positions, including supine, prone, and sitting. In each position the measurement was repeated twice, and a one-minute break was given between each cycle, so it was measured six times in total. SPSS 14.0 for Windows was used to analyze the data. The subjects' general properties were analyzed using descriptive statistics, and the correlation between the angle and the respiration variable result in each position was analyzed. The result of the respiration variable in each position was analyzed using the one-way ANOVA, and then a Scheffe post-hoc comparison was executed. Results: According to the analysis result of the correlation between the angle and respiration variable in each position, the sitting position and FEF (25-75%) showed a positive correlation (P<0.05). The respiration variable in each position showed a significant difference in FVC (p<0.05), and the Scheffe post-hoc comparison differed in prone and sitting positions. Conclusion: To increase the FVC of FHP patients, different exercises for each position can be applied, and the result of this study can be utilized as background data for further research.

A Study on Measurement of Blood Pressure by Partial Least Square Method (부분최소자승법을 이용한 혈압 측정에 관한 연구)

  • Kim, Yong-Joo;Nam, Eun-Hye;Choi, Chang-Hyun;Kim, Jong-Deok
    • Journal of Biosystems Engineering
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    • v.33 no.6
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    • pp.438-445
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    • 2008
  • The purpose of this study was to develop a measurement model based on PLS (Partial least square) method for blood pressures. Measurement system for blood pressure signals consisted of pressure sensor, va interface and embedded module. A mercury sphygmomanometer was connected with the measurement system through 3-way stopcock and used as reference of blood pressures. The blood pressure signals of 20 subjects were measured and tests were repeated 5 times per each subject. Total of 100 data were divided into a calibration set and a prediction set. The PLS models were developed to determine the systolic and the diastolic blood pressures. The PLS models were evaluated by the standard methods of the British Hypertension Society (BHS) protocol and the American Association for the Advancement of Medical Instrumentation (AAMI). The results of the PLS models were compared with those of MAA (maximum amplitude algorithm). The measured blood pressures with PLS method were highly correlated to those with a mercury sphygmomanometer in the systolic ($R^2=0.85$) and the diastolic blood pressure ($R^2=0.84$). The results showed that the PLS models were the effective tools for blood pressure measurements with high accuracy, and satisfied the standards of the BHS protocol and the AAMI.

Applicability Evaluation of a Mixed Model for the Analysis of Repeated Inventory Data : A Case Study on Quercus variabilis Stands in Gangwon Region (반복측정자료 분석을 위한 혼합모형의 적용성 검토: 강원지역 굴참나무 임분을 대상으로)

  • Pyo, Jungkee;Lee, Sangtae;Seo, Kyungwon;Lee, Kyungjae
    • Journal of Korean Society of Forest Science
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    • v.104 no.1
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    • pp.111-116
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    • 2015
  • The purpose of this study was to evaluate mixed model of dbh-height relation containing random effect. Data were obtained from a survey site for Quercus variabilis in Gangwon region and remeasured the same site after three years. The mixed model were used to fixed effect in the dbh-height relation for Quercus variabilis, with random effect representing correlation of survey period were obtained. To verify the evaluation of the model for random effect, the akaike information criterion (abbreviated as, AIC) was used to calculate the variance-covariance matrix, and residual of repeated data. The estimated variance-covariance matrix, and residual were -0.0291, 0.1007, respectively. The model with random effect (AIC = -215.5) has low AIC value, comparison with model with fixed effect (AIC = -154.4). It is for this reason that random effect associated with categorical data is used in the data fitting process, the model can be calibrated to fit repeated site by obtaining measurements. Therefore, the results of this study could be useful method for developing model using repeated measurement.

A Study on the Application Technique of Realtime Bridge Monitoring System based on GNSS (GNSS 기반의 실시간 교량변위 모니터링 시스템 적용기술 연구)

  • Yeon, Sang-Ho
    • The Journal of the Korea Contents Association
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    • v.16 no.1
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    • pp.362-369
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    • 2016
  • Recently, Last to check the security status of various medium and large bridge structures using various kinds of measurement equipment, but most of the methods are used to measure and check the displacement behavior of the bridge by a certain period. In this study, receive GPS satellite signals that can be observed in real time the whole region, a bridge to automatically measure the displacement and behavior characteristics of the structure in real-time in mm over the 24 hours, the measurement information and transmits the data to the wireless network, by making use, it was applied to the real-time monitoring system in connection with a bridge to be able to automatically notify GNSS fine displacement behavior. In fact, analysis and receives the measurement data to GNSS provided in the upper bridge of the middle and large-sized aging for this purpose, measuring USN and at the same time is converted into a three-dimensional position information of a test study was conducted to monitor the bridge displacement in real time. As a result, a vertical displacement of about 0.027~0.037m at the measurement time of day of the measurement point is that the repeated and confirmed.

An Estimation of Performance Test and Uncertainty of Measurement for a Large Axial-flow Fan Based on ANSI/AMCA 210 Standard (ANSI/AMCA 210 기준에 의한 대형 축류 송풍기의 성능시험 및 측정 불확도 평가)

  • Ko, Hee-Hwan;Chung, Cheol-Young;Kim, Kyung-Yup
    • The KSFM Journal of Fluid Machinery
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    • v.17 no.2
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    • pp.24-29
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    • 2014
  • In general, a large-capacity axial flow fan is used for industrial processes or ventilation in a social overhead capital infrastructure. The main characteristics of the large axial-flow fan need a lot of electrical power consumption and operate 24 hours a day, 365 days a year. Since the large axial flow fan consumes several hundreds to thousands kW per hour, both manufacturer and consumer are struggling to select high efficiency products for saving energy and reducing operation cost. Therefore, the performance testing should be accurately conducted in experimental equipments. The performance estimation and uncertainty of measurement of the axial-flow fan gathered from the result from nozzle shaped testing equipments certified with ANSI/AMCA standard and duct shaped testing equipment under the same experimental condition. The experimental results from both facilities have maximum 17% differences in performance evaluation and uncertainty of measurement. As considering that the differences, it is doubt about the reliability of testing result. The test was repeated with the specific term during 12 months because it is important to fully reflect the real conditions and to decide the repeatability of data. The evaluation of duct type testing facilities was failed to get an uncertainty measure. Testing results were previously published. As a series of previous paper, axial fan (∅1690 mm) and duct type testing facilities were fabricated. The purpose of fabricating testing equipment was testing an uncertainty measurement under the controlled environments.

The Effects of Air-Pressure Cervical Traction Treatment on Forward Head Posture, ROM and Pain in the Tension Headache in the Adults (성인의 긴장성 두통에 에어견인요법이 앞쪽머리자세와 ROM 및 통증에 미치는 영향)

  • Cho, Namjeong;Lee, Soljae
    • Journal of The Korean Society of Integrative Medicine
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    • v.2 no.4
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    • pp.9-17
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    • 2014
  • Purpose : The purpose of this study was to ascertain the effects of air-pressure cervical traction on the tension headache in the adults. Method : All subjects were treated with air-pressure cervical traction while 15 minutes a day, 3 times per week, for 4 weeks. The effects of air-pressure cervical traction were evaluated by HIT-6(headache impact test), VAS, and flexion, extension, left right flexion, left right rotation of cervical ROM. The measured data were analyzed by using repeated ANOVA. Especially in order to investigate the effect of air-pressure cervical traction. The comparison with among three measurement time. Results : The results of this study were as follows; 1) Prior and two weeks measurement did not show significant differences. The head forward posture than before the experiment, each experimental group was significantly increased(p<.05). 2) Prior and two weeks measurement did not show significant differences. The experimental group than ever cervical ROM of the movable range increased significantly(p<.05). 3) The experimental group was significantly lower than before the VAS(p<.05). 4) HIT score of the experimental group was significantly lower than before(p<.05). Conclusion : These findings suggest that air-pressure cervical traction had effect on the tension headache in the adults.

Generalizability of Polygraph Test Procedures using Backster ZCT: Changes in reliability as a function of the number of relevant questions, the number of repeated tests, and the number of raters (Backster ZCT를 사용한 폴리그라프 검사절차의 일반화가능도: 관련 질문의 개수, 반복측정 횟수, 채점자의 수에 따른 신뢰도의 변화)

  • Eom, Jin-Sup;Han, Yu-Hwa;Ji, Hyung-Ki;Park, Kwang-Bai
    • Science of Emotion and Sensibility
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    • v.11 no.4
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    • pp.553-564
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    • 2008
  • Generalizability theory was employed to examine how the reliability of polygraph test is affected by the number of relevant questions, the number of repeated tests (the number of of charts), and the number of raters(scorers). The data consisted of the results of the polygraph tests administered to 31 crime suspects. The sample was drawn from the real polygraph tests based on Backster ZCT and archived by the Prosecutor's Office of the Republic of Korea. The numerical scores assigned by thirteen raters to the test charts were analyzed to determine the generalizability of the scores. The largest variance component was accounted for by the examinee factor(43.97%) and the residual variance component was 16.84% of the total variance. The variance component due to the interaction between the examinee and the chart factors was 12.17% and the variance component due to the three way interaction of the examinee, the repeated test, and the relevant question factors was 10.31%. The generalizability coefficient for the current measurement procedure as practiced by the Korean Prosecutor's Office was 0.74 which suggests that the current procedure is acceptable. However, measurement procedures with the combination of more than two relevant questions, more than three repeated tests, and more than two raters were generally found to yield generalizability coefficients larger than 0.80. Therefore, such procedures need to be considered seriously in order to significantly improve the reliability of polygraph test.

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The Effect of Muscle Relaxation Therapy on Nausea, Vomiting and Anxiety of Children with Chemotherapy (근육이완요법이 항암화학요법을 받는 아동의 오심, 구토 및 불안에 미치는 효과)

  • Jung Kyong Hee
    • Child Health Nursing Research
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    • v.6 no.1
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    • pp.60-68
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    • 2000
  • The purpose of this study is to assess the effect of progressive muscle relaxation therapy on nausea, vomiting and anxiety experienced by children who were histologically diagnosed as malignancy and have received cancer chemotherapy. Twenty subjects with 10 in experimental group and 10 in control group, between the age of 7 to 12 years participated in this study. All subjects were admitted for inpatients chemotherapy at the S hospital between April to August 1998. The methods used for interventional muscle relaxation were both the 16 items of the progressive muscle relaxation therapy developed by Jacobson and the 4 items of the muscle relaxation therapy by Wolpe. The method for assessing nausea, vomiting was the Index of Nausea and Vomiting by Rhodes et al and that for anxiety was State-Trait Anxiety Inventory for Children by Spielberger. The data was analysed by repeated measures ANOVA and Scheffe test using SAS program. The results were as follows : 1. On measurement of nausea, vomiting, in the experimental group, the mean values of the second and the third measurements showed tendency to slightly decrease compared with the first measurement, but there was no statistically significance. And in the control group, there were no significant differences among first measurement, second measurement and third measurement. Also there was no significant difference in the mean values assessing nausea, vomiting between experimental and control group (F=1.33, p=0.2645). 2. The results assessing state anxiety showed, in the experimental group, progressive decrease in mean values at each measurement, while the control group showed no significant differences between the mean values of each measurement. Also there was statistically significant difference in state anxiety measurements between experimental and control group(F=4.36, p=0.05). In conclusion, muscle relaxation therapy for school-aged children with chemotherapy could not be effective to decrease nausea, vomiting, but it could be effective to decrease anxiety.

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