• Journal of the Korean Data and Information Science Society
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• 제17권4호
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• pp.1397-1403
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• 2006

This paper considers the testing problem for scale changes in autoregressive processes with heavy-tailed innovations. For a test, we propose the CUSUM test statistic based on the trimmed residuals. We perform a simulation study for the mixture normal and Cauchy innovations.

• Journal of the Korean Statistical Society
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• 제23권1호
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• pp.179-185
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• 1994

To test the equality of survival distributions in the presence of arbitrary right censorship, the choice of weights which are functions of the number of individuals at risk at the time of each death is very important in increasing the power of the test. In this paper a weight by probit scale is derived and the efficiencies relative to the other weight's are also investigated.

• 한국화재소방학회:학술대회논문집
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• 한국화재소방학회 2012년도 춘계학술발표회 초록집
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• pp.329-332
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• 2012

This study focuses on the establishment of bed mattress fire test in real scale where it explains the burner heat supply, test procedure and test report in detail. Especially burner system is dealt in importance for bed mattress test in real scale due to simulating in bedding component by burner heat out-put.

• 한국소음진동공학회:학술대회논문집
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• 한국소음진동공학회 2007년도 추계학술대회논문집
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• pp.1455-1458
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• 2007

Vibration characteristics of concrete slabs were investigated using a 1:10 scale model and finite element method. A 1:10 scale model of a test building with 150 and 200mm slab thicknesses was made of acrylic materials. Modal test was conducted to investigate mode shape and modal frequencies. Results show that the mode shapes of two slabs with different thickness are similar each other, whereas natural frequency is different. Through modal analysis using FEM, it was revealed that both mode shapes and natural frequencies calculated from the FEM model are similar to those of the scale model measurement. It was also found that natural frequencies increased with increment of the slab thickness.

• 펄프종이기술
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• 제48권1호
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• pp.19-26
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• 2016

In the consumer products industry, it has been highly desirable to develop objective test methods to replace subjective evaluation methods. In developing an objective test method, subjective evaluation data should be on a linear scale. According to Thurstone's theory of comparative judgment, a%-preference from a paired-comparison test can be converted to a linear-scale value. The required number (N) of paired-comparison tests increases dramatically as the number of products increases. This problem should be solved by classifying the total products into several subgroups consisting of 3-4 products in each group. By doing so, it can not only significantly reduce the number of required paired-comparison tests, but it can also obtain more reliable, reproducible data.

• 한국지반공학회:학술대회논문집
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• 한국지반공학회 2010년도 춘계 학술발표회
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• pp.1094-1103
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• 2010

The safety of pile foundation is getting declined when the pile foundation acting on lateral load is exposed by dredging. So appropriate reinforcement is needed for stability secure. Thus, in this study, the stability variation and reinforcement range caused by dredging is estimated on the basis of down scale test. The scale effect is determined by real scale numerical analysis. the behavior of pile by dredging stages is estimated by load control type. The credibility is verified through the comparison between down scale model test and numerical analysis.

• 한국지반공학회:학술대회논문집
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• 한국지반공학회 2002년도 가을 학술발표회 논문집
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• pp.350-357
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• 2002

The scale effect should be considered to determine the bearing capacity and settlement of footings from Plate-Load Test, because of the size difference between a footing and a loading plate. To analyze characteristics of bearing capacity and settlement according to the difference of loading plate sizes, model tests were peformed with four different sizes of square plate, which is B=10, 15, 20 and 25cm respectively, on five different kinds of subsoil, which is pure sand(100:0), sand-clay mixed soil(75:25, 50:50, 25:75), and pure clay(0:100). Based on the analyzed results, this paper also proposed a method of bearing capacity and settlement determination, where scale effect is considered depending on the mixing ratio of sand and clay. Applying the formular proposed in this research to field problems, it is expected that evaluation of bearing capacity and settlement of footings can be more reliable and more economic construction can be achieved.

• International Journal of Contents
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• 제17권2호
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• pp.20-31
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• 2021

This study aimed to pilot test a newly developed bilateral upper limb rehabilitation training program for improving the upper limb function of individuals with chronic stroke using a visual feedback method. The double-group pretest-posttest design pilot study included 10 individuals with chronic stroke (age >50 years). The intervention (four weekly meetings) consisted of five upper limb training protocols (wrist extension; forearm supination and pronation; elbow extension and shoulder flexion; weight-bearing shift; and shoulder, elbow, and wrist complex movements). Upper limb movement function recovery was assessed with the FuglMeyer Assessment of the Upper Extremity, the Wolf Motor Function Test, the Trunk Control Test, the modified Ashworth Scale, and the visual analog scale at baseline, immediately after, and four weeks after the intervention. The Fatigue Severity Scale was also employed. The Fugl-Meyer Assessment of the Upper Extremity and Wolf Motor Function Test showed significant improvement in upper limb motor function. The Trunk Control Test results increased slightly, and the modified Ashworth Scale decreased slightly, without statistical significance. The visual analog scale scores showed a significant decrease and the Fatigue Severity Scale scores were moderate or low. The bilateral upper limb training program using the visual feedback method could result in slight upper limb function improvements in individuals with chronic stroke.

• 항공우주기술
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• 제11권1호
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• pp.7-18
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• 2012

국내 최초의 인증용 민수 항공기(KC-100) 개발을 위하여 수행한 전기체 정적구조시험에 대하여 소개하였다. 구체적인 내용으로는 시험요구도, 시험프레임, 주요 시험장치들인 하중 부가장치, 중량보상장치, 시험체 자세구속장치 및 잭킹 장치에 대하여 자세하게 설명하였고 특히 하중작용을 정확하게 부가하기 위하여 시험체의 설치와 하중부가치구의 설치에 대한 합치성을 보이는 과정을 자세하게 소개하였다. 전기체 하중시험 15가지와 국부하중시험 7가지 총 22가지 시험조건에 대하여 성공적으로 시험 수행하였고 시험 데이타들을 확보하였다.

• 한국건설순환자원학회논문집
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• 제8권4호
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• pp.413-420
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• 2020

이 연구에서는 펌핑 후 콘크리트의 작업성 변화를 실내에서 평가하기 위한 새로운 실험 장비를 개발하였다. 이 장비는 실제 펌핑 중 콘크리트가 받는 압력과 전단을 모사할 수 있도록 설계되었다. 실내 실험 장비를 사용한 펌핑 후 콘크리트 작업성 변화 평가 가능성을 검토하기 위하여 실규모 펌핑 실험과 실내 모사 실험을 동시에 수행하였다. 실규모 펌핑 실험에 사용한 콘크리트의 설계기준압축강도는 24, 35, 60MPa이며, 배관의 길이는 130, 304, 518m이다. 펌핑 실험과 동일한 콘크리트를 사용하여 실제 펌핑 조건(압력, 전단, 펌핑 시간)을 고려한 실내 모사 실험을 수행하였다. 실험 전, 실규모 펌핑 실험 후, 실내 모사 실험 후 콘크리트의 작업성(슬럼프 또는 슬럼프 플로)을 측정하였다. 실규모 펌핑 실험과 실내 실험 모두 콘크리트의 작업성이 감소하였으며, 두 실험의 결과가 매우 유사하게 측정되었다.