• 대한전기학회:학술대회논문집
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• 대한전기학회 2001년도 하계학술대회 논문집 C
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• pp.1789-1791
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• 2001

Recently, Water Blocking Conductor have been used to basic specification at the EHV XLPE Cable, GlobalIy. The area of Middle East have need of severe test condition than existing the Water Penetration Test, specially. In this paper, compare with and investigate the Water Penetration Test's each standard, describes the development Water Blocking Conductor in the high water-pressure for the EDF HN 33-S-51's Water Penetration Test passing.

• 대한가정학회지
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• 제42권12호
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• pp.69-76
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• 2004

The purpose of this study was to investigate the colorfastness of cotton and silk fabric dyed with extract of Lotus leaf princeps. The experimental items were classified into mordanting treatments, fabric components and kind of mordants. The experimental test was done by laundering, abrasion(dry/wet), perspiration(acid/alkali) , light fastness, color difference by C.C.M(computer color matching) system and K/S test. The summarized findings resulting from the experiment and investigation are as follows: In the C.C.M and K/S test on mordanting method and kind of fabrics, co-mordanting treatment method and protein fabric (silk) were the most effective. Especially, Fe mordanting treatment was higher than Al, Cu, Cr and none-mordanting. In colorfastness on the mordants, perspiration and laundering fastness showed high grade (4-5) but grades of perspiration(2-3/4) and light fastness(1-3) were low.

• 전력전자학회:학술대회논문집
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• 전력전자학회 2005년도 전력전자학술대회 논문집
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• pp.143-145
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• 2005

This paper describes the transmission method of an information using communication networks between RTU(Remote Terminal Unit) and PCU(Protection and Control System) of the DC switchgear for Light Railway Vehicle. Also the test result carried out in the laboratory was represented. In this test, transmission signal waveform, polling time, response time and request/response frame between RTU and PCU were measured. The field test including the measurements of analog signal and status of the digital logic operation of PCU was conducted in Gyeongsan Test Track.

• 대한의용생체공학회:의공학회지
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• 제30권1호
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• pp.94-102
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• 2009

In this paper, we propose a hearing impairment simulator considering reduced frequency selectivity of the hearing impaired, and verify it's performance through experiments. The reduced frequency selectivity was embodied by spectral smearing using linear prediction coding(LPC). The experiments are composed of 4 kinds of tests; pure tone test, speech reception threshold(SRT) test, and word recognition score(WRS) test without spectral smearing and with spectral smearing. The experiments of the hearing impairment simulator were performed with 9 subjects who have normal hearing. The amount of spectral smearing was controlled by LPC order. The percentile score of WRS test without smearing is $89.78{\pm}2.420%$. The scores of WRS with 24th LPC order and with 8th LPC order are $88.00{\pm}3.556%$ and $83.78{\pm}2.123%$ respectively. It is verified that WRS score is lowered by decreasing LPC order. This is a reasonable result considering that spectral smearing is getting heavier according to decreasing LPC order. It is confirmed that spectral smearing using LPC simulates the reduced frequency selectivity of the hearing impaired and affects the clearness of speech reception.

• 대한디지털의료영상학회논문지
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• 제12권2호
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• pp.133-138
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• 2010

The purpose of this study was to survey and test quality control of mammography system. The conclusion of this study is as follows ; First, The rate of pass for phantom image test shows that Film-Screen mammography system(F/S) and computed mammography system(CR) is 80%, Indirect digital mammography system(DR) is 100%. Second, The test of exposure dose shows that F/S is 921 mR. CR is 1,140 mR, DR is 474 mR. The grade of this testament is CR > F/S > DR. Third, The test of average glandular dose shows that F/S is 1,336 mGy, CR is 1,635 mGy, DR is 1,26 mGy. The grade of this testament is CR > F/S > DR. Fourth, The testament of resolution shows as follows F/S is 11~13 Lp/mm, CR is 4~5 Lp/mm, and DR is 5~7 Lp/mm(F/S > DR > CR) Fifth, The survey of projection, cassette, development and reading shows that user are indifference.

• 한국자동차공학회논문집
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• 제19권6호
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• pp.90-96
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• 2011

In this study, the characteristic of fractured portion and shape on solder joints were investigated according to the thermal shock test for Automotive Application Component using Sn-3.0Ag-0.5Cu solder, which has a outstanding property as Lead-free solder. The value of pull and shear strength was decreased in principle after 432 cycles thermal shock test. In addition, fracture mode was verified by using EDS and SEM to observe fractured shape on the solder joints before and after thermal shock. In before thermal shock test, the fracture mode revealed typically solder layer's fracture mode. In after thermal shock test, we identified multiple fracture mode of the ductile and brittle fracture. Even though same composition of solder was used to experimental for estimating. the fracture mode varied on the fracture portion's height and the directional angles of shear strength. In conclusion, we identified that mechanical strength was affected on the solder layer's fracture mode.

• 아동학회지
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• 제26권2호
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• pp.75-89
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• 2005

The subjects of this study were 172 5-year-old children enrolled in a kindergarten located in Daejeon city. Instruments were the K-ABC(1997) to test children's intelligence and the TTCT(1999) to test children's creativity, Data were analyzed by Pearson's R and Canonical R. Results indicated that the relation between K-ABC IQ and TTCT CQ was statistically significant(r=.292, p<.000). This result is at variance with threshold theory where the correlation between intelligence and creativity is predicted to be high for children with IQ below 120, but above that level, the correlations are predicted to be much lower. A significant canonical function(Wilk's =.760, p<.000) was found between the sequential processing scale, achievement scale of K-ABC and elaborateness, resistance to premature closure of TTCT.

• Clinical and Experimental Pediatrics
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• 제59권12호
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• pp.483-489
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• 2016

Purpose: We investigated the number of test takers of the Korean-Developmental Screening Test (K-DST) in a single children's hospital within a year, according to age, referral rate, and follow-up percentage. Methods: For this study, 4,062 children who visited and received K-DST at Woorisoa Children's Hospital between January and December 2015 were enrolled. Seven test sets were used according to the Korean National Health Screening Program for infants and children in the following age groups: 4 to 6, 9 to 12, 18 to 24, 30 to 36, 42 to 48, 54 to 60, and 66 to 71 months. The results of the K-DST were categorized into 4 groups as follows: further evaluation (<-2 standard deviation [-2SD]), follow-up test (-2SD to -1SD), peer level (-1SD to 1SD), and high level (>1SD). Results: The test participants' population and follow-up population were concentrated before the age of 24 months (2,532, 62.3%). The children most commonly referred for further evaluation were those in the 30- to 41-month age group. A mismatch was found between the results of the K-DST and the additional questions. Most of the infants and children with suspicious developmental delays showed catch-up development in their follow-up tests (43 of 55, 78.2%). Conclusion: The use of K-DST should be encouraged, especially among children aged over 24 months. Multiple-choice question format for the additional questions is recommended to avoid confusion. We suggest a nationwide study to evaluate and revise the K-DST.

• Journal of the Korean Academy of Child and Adolescent Psychiatry
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• 제2권1호
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• pp.24-31
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• 1991

시험불안이 어떻게 해서 생기는 가에 대해서는 학자들마다 보는 관점이 조금씩 다르지만, 대부분 어릴 때부터 가정이나 학교에서 경험을 중요시 하고 있다. 본 연구에서는 그 중 가정에서 부모의 양육태도(자율-통제, 수용-거부, 보호-방임, 성취-안일)와 자녀의 시험불안과 관계를 보기 위해서 우리나라 학생들을 위한 시험불안도 진단검사(TAK-I)와 연구자가 작성한 자녀용 부모태도 진단도구를 초등학교 4학년 이상의 남, 녀학생 481명과 중, 고등학생 500명에게 실시하였다. 그 결과를 보면, 부모의 거부적인 태도는 시험불안과 정적 상관($r=.25{\sim}.29$)이 있으며, 자율적이고, 수용적인 태도는 부적 상관($r=-.15{\sim}-.24$)이 있는 것으로 나타났다. 부모의 태도에 따라 각 집단별로 그 시험불안도의 평균을 비교해 보면, 국민학생, 중, 고등학생 모두에게 부모의 성취지향적인 태도는 높은 시험불안을 불러 일으키고, 수용적인 태도를 가진 부모 밑에서는 자녀가 낮은 시험 불안을 갖게 되는 것으로 나타났으며, 그 차이는 유의하였다.($P{\leq}.05$). 그러므로 자녀가 무조건 좋은 시험결과를 가져오도록 기대하는 부모 밑에서 자녀의 시험불안은 높아지게 되므로, 자녀의 능력을 고려하고, 격려해주는 부모들의 태도가 요구된다고 볼 수 있겠다.

• 기술발표회
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• 통권2006호
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• pp.320-328
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• 2006

In this test, there was two dimensional model loading test implemented for analysis with respect to the problem of evaluating bearing capacity and the application range on the dredged and reclaimed ground. It was got following conclusion through comparison of button's and Brown&Meyerhof"s equation with experimental result that was obtained by 2 dimensions model loading test. For the difference between average undrained shear strength by 2/3B of loading board width and under 2/3B is more than ${\pm}$ 50%, application of Nc(coefficient of bearing capacity was used in that case $\phi$=0 analysis is considered in the single layer) was declined. Brown&Meyerhof(1969)'s equation was underestimated comparing with loading test result, while Button(1953)'s equation was overestimated comparing with loading test result applied dividing as double layers of upper dessication layer and lower soft layer about dredged and reclaimed ground. Also, bearing capacity factors, Nc that was calculated by using button's equation was estimated greatly about 1.7 times more than bearing capacity factors, Nc that was calculated by using Brown&Meyerhof's equation. Bearing capacity factors, Nc that was calcuated by using Brown&Meyerhof's and Button's equation was evaluated each 2.3-3.6 times, 1.3-2.1 times smaller than bearing capacity factors, Nc5.14 that was calcuated by using Meyerhof's equation in case of unit layer.