• Title/Summary/Keyword: Comparison Test

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Comparison of Analytical Bond Models between Reinforcement and Concrete (보강근과 콘크리트 사이의 해석적 부착모델 비교)

  • You Young Jun;Park Ji Sun;Park Young Hwan;Kim Hyeong Yeol;You Young Chan;Kim Keung Hwan
    • Proceedings of the Korea Concrete Institute Conference
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    • 2005.11a
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    • pp.33-36
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    • 2005
  • This paper presents the comparison of the goodness-of-fit test of analytical bond models between concrete and steel or GFRP reinforcements. Bond test specimens were made by the CSA code and the rebars used in the test were steel and two kinds of GFRP rebar commercially utilized. The comparison of goodness-of-fit test for existing bond models and new proposed bond model was carried out by the least squares method. The result indicates that the new proposed bond model has better goodness-of-fit test than the existing ones.

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Temperature Analysis of Each Coolant Level by a Multiple Comparison in Turning Process (다중비교를 이용한 선삭가공시 절삭유량에 따른 온도변화분석)

  • Park, Tae-Jun;Yang, Seung-Han;Lee, Yeong-Mun;Kim, Hui-Sul
    • Journal of the Korean Society for Precision Engineering
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    • v.18 no.12
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    • pp.110-115
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    • 2001
  • In this paper, a multiple comparison was proposed to minimize the amount of coolant. And new coolant level, called "low level", was suggested to show usefulness of multiple comparison for experiments. The amount of this levee is about 1/4 of conventional coolant amount-called "high level", and dry cutting is called "none level". Using these coolant levels, the cutting temperatures of each coolant level in turning process were analyzed by analysis of variance(ANOYA)-test and a multiple comparison. As the result of ANOVA-test, we have just known that the average of temperature of each coolant level is not equal. However by Tukey's HSD, one of multiple comparison. it was analyzed that the average of temperature of low level is similar to that of high levee and different from that of none level.erent from that of none level.

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Trend Comparison of Repeated Measures Data between Two Groups (반복측정 자료에서 개체기울기를 이용한 집단간의 차이 검정법)

  • Hwang, Kum-Na;Kim, Dong-Jae
    • The Korean Journal of Applied Statistics
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    • v.19 no.3
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    • pp.565-578
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    • 2006
  • Repeated measurement data between two group is often used in the field of medicine study. In this paper, we suggest a method for comparison of the trend between two groups based on repeated measurement data. First, we estimate regression coefficient of linear regression model from each subject and generate samples using the regression coefficient estimated previous. And then, we test the difference between two groups by unpaired t-test, Wilcoxon rank sum test and placement test using generated samples. Monte Carlo Simulation is adapted to examine the power and experimental significance levels of several methods in various combinations.

A Study on Analysis of the Physical Properties of Domestic and Foreign Sensitive Worsted Fabrics - Subjective hand assessments, Comparison between 1st and 2nd experiment - (국내.외 감성 소모직물의 물성분석에 관한 연구(II) - 주관적 태 평가, 1차, 2차 비교.분석 -)

  • Kim, Seung-Jin;Park, Kyung-Soon
    • Science of Emotion and Sensibility
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    • v.11 no.1
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    • pp.113-122
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    • 2008
  • This study surveyed the physical properties of the domestic and foreign worsted fabrics which are used for men's garments. For this purpose, forty specimens which were divided into 1st fourteen specimens and 2nd twenty six ones were prepared and the physical property assessment by Blind field test was carried out by test committee. The subjective test items by Blind field test were chosen as handle(softness, flexibility), color(brightness, deepness), appearance(cleanness, natural lustre) and comparison priority.

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Comparison Density Representation of Traditional Test Statistics for the Equality of Two Population Proportions

  • Jangsun Baek
    • Communications for Statistical Applications and Methods
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    • v.2 no.1
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    • pp.112-121
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    • 1995
  • Let $p_1$ and $p_2$ be the proportions of two populations. To test the hypothesis $H_0 : p_1 = p_2$, we usually use the $x^2$ statistic, the large sample binomial statistic Z, and the Generalized Likelihood Ratio statistic-2log $\lambda$developed based on different mathematical rationale, respectively. Since testing the above hypothesis is equivalent to testing whether two populations follow the common Bernoulli distribution, one may also test the hypothesis by comparing 1 with the ratio of each density estimate and the hypothesized common density estimate, called comparison density, which was devised by Parzen(1988). We show that the above traditional test statistics ate actually estimating the measure of distance between the true densities and the common density under $H_0$ by representing them with the comparison density.

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Effects on Health Promotion Behavior of Health Instruction in Elementary School (초등학교 보건학습이 건강증진행위에 미치는 영향)

  • Hong, Hyun-Mi;Lee, Hyeo-Kun
    • The Journal of Korean Society for School & Community Health Education
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    • v.1 no.1
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    • pp.1-9
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    • 2000
  • The purpose of this study were to assess the effect on health promotion behavior of health instruction in elementary school and to provide a basis of school health education. Subjects of this study were random sampled 80 students for control group in elementary 6th grade students. the treatment group systematically studied five sphere instruction: individual hygiene, disease prevention, first-aid & safety, oral health, health & nutrition in two hours a week, from April 20, till July 10. Each group was pre-tested and post-tested by health behavior promotion questionnaire. The conclusions as follows; 1. Compare analysis of control group and treatment group in the pre-test according to health condition of children were no significant difference physical health condition, health anxiety, disease-absent(P>.05). 2. Health promotion behaviors in the post-test according to concern quotient significantly correlated with individual hygiene(r=.249, P<.05), disease prevention(r=.477, P<.01), oral health(r=.228, P<.05), health & nutrition(r=.323, P<.01) in the treatment group, on the contrary the disease prevention, first-aid & safety, oral health, health & nutrition(P>.05). 3. The difference of health promotion behavior within & between group were as follow; 1) The difference of individual health hygiene with in the treatment group was significant in pre-post test, the comparison of the two groups was significant difference in post-test(treatment group: $3.965{\pm}.568$, control group: $3.645{\pm}.573$). 2) The difference of disease prevention with in the treatment group was significant in pre-post test, the comparison of the two groups was significant difference in post-test(t group : $3.475{\pm}.619$, c group: $3.964{\pm}.600$). 3) The difference of first-aid & safety with in the treatment group was significant in pre-post test, the comparison of the two groups was significant difference in post-test(t group : $3.700{\pm}.466$, c group: $4.140{\pm}.545$). 4) The difference of oral health with in the treatment group was significant in pre-post test, the comparison of the two groups was significant difference in post-test(t group: $3.163{\pm}.665$, c group: $3.753{\pm}.544$). 5) The difference of health & nutrition with in the treatment group was significant in pre-post test, the comparison of the two groups was significant difference in post-test(t group : $3.255{\pm}.515$, c group: $3.698{\pm}.558$).

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Development of Accelerated Life Tests for Solid Aluminum Electrolyte Capacitor Made by Domestic Manufacturing Company and Comparison of Characteristics between Domestic Products and Foreign Advanced Products (국산 고체 알루미늄 전해 커패시터의 가속수명시험 개발 및 국외 선진업체 제품과의 특성 비교)

  • 박정원;이중휘
    • Journal of Applied Reliability
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    • v.2 no.1
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    • pp.1-14
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    • 2002
  • High temperature operating test, temperature humidity test and temperature cycling were performed at various test levels for solid aluminum electrolyte capacitors made by domestic manufacturing company and foreign advanced manufacturing company. It was found that main failure mode of solid aluminum electrolyte capacitors was the decrease of their capacitances. The decrease of their capacitances has the same pattern in these tests. Test result for comparison of characteristics between domestic products and foreign advanced products shows that domestic products have the shorter lifetime and their capacitances decrease more rapidly in high temperature operating test and temperature humidity test. Also in these tests, accelerated tests for high temperature operating test and temperature humidity test were developed.

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Detection of antibodies against infectious Borna disease virus -a comparison of three serological methods- (보르나병 바이러스 항체검출을 위한 연구 -세 가지 혈청진단법의 비교-)

  • Lee, Du-sik
    • Korean Journal of Veterinary Research
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    • v.32 no.1
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    • pp.57-61
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    • 1992
  • To determin the accuracy of serological methods in detecting Borna-disease(BD) viral antibodies, 273 experimentally infected rabbit sera were compared by using indirect immunofluorescence antibody test(IFA), serum neutralization test(SN) and enzyme-linked immunosorbent assay(ELISA). One hundred twenty-three serum samples had BD viral antibodies detected by IFA. CELISA antibodies to BD virus were also present in the same one hundred twenty-three serum samples. However, neutralization test antibodies to BD virus were present in 27 of the in rabbit serum samples. Neutralization test was sensitive in comparison with KFA and CELISA. In comparison with IFA, CELISA was both sensitive and specific in detecting BD viral antibodies. These results extend observations made with laboratory animals to the diagnosis of naturally infected animals.

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Comparison of Abductor Hallucis Contractility between Regular and Flat Feet during SFE with SLSKB Test

  • Moon, Dong-Chul;Jung, Ju-Hyeon
    • PNF and Movement
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    • v.20 no.3
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    • pp.409-416
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    • 2022
  • Purpose: This study compared and analyzed the contractility of the abductor hallucis (AbdH), an intrinsic foot muscle, between flat feet and normal feet during a movement control test (single-leg small knee band test) using ultrasonography. Methods: A total of 23 subjects with (n = 11) and without (n = 12) flatfoot were included in the study. Each subject performed the short foot exercises (SFE) with a single-leg small knee bend (SLSKB) test, which is a functional movement. An ultrasound device was used to collect data regarding the changes in the contractility of the AbdH. Results: Intergroup comparison showed that dorsoplantar thickness was significantly reduced at baseline and during the SFE with SLSKB in the flatfoot group (p < 0.05). Intragroup comparison showed that the cross-sectional area significantly improved when the SFE was performed with SLSKB in the control group (p < 0.05). Conclusion: In this study, it was observed that the AbdH had inadequate contractility during the SLSKB test in subjects with flatfoot; therefore, it is important to train the contraction of the AbdH via functional movements during clinical interventions for subjects with flatfoot.

The Clinical Tests for Treatment Improvement Comparison in Myopia between Eye Acupuncture Massage Machine (NURIEYE-1) and Acupuncture (경도근시(가성근시 포함) 환자에 있어 눈 경혈 마사지기와 침치료간의 증상개선 효과 비교를 위한 임상시험(단일기관, 무작위 배정))

  • Kim, Mi-Bo;Kim, Kyu-Kon;Hong, Sang-Hun;Ko, Woo-Shin;Yoon, Hwa-Jung
    • The Journal of Korean Medicine Ophthalmology and Otolaryngology and Dermatology
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    • v.22 no.3
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    • pp.80-94
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    • 2009
  • Objective : The purpose of this clinical research is the investigation of the effects between acupuncture group(control group) and NURIEYE-1 group (experimental group) in myopia Methods : Comparison clinical study was conducted with the randomly arranged 32 patients for acupuncture group(control group) and NURIEYE-1 group(experimental group). For effectiveness evaluation, eye sight test, MQOL and DITI were tested three times with visits for every 4 weeks. With SAS, Statistical analysis was performed by using paired t-test and two sample t-test. Statistical significance was achieved with less than 5% probability (p<0.05). Result : 1. There was no significant effect from the eye sight comparison between the two group. We had improved results in average with MQOL, however, there was no statistical significance. Though there was also no significant result with DITI average comparison between two group, we witnessed significant effect in some part of MQOL. 2. Nevertheless Periodical comparison test showed weak significance with eye sight and DITI, significant effect was found in some part of MQOL. 3. With periodical comparison tests, there were significant effects in eye sight, MQOL and DITI with the experimental groups and control groups, respectively. Conclusion : There was no significant eye sight improvement. However, with acupuncture point stimulation, we think there are some positive effects for the relaxation of excessive stress in eyes.

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