• Journal of Periodontal and Implant Science
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• 제31권2호
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• pp.465-475
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• 2001

The purpose of this study was to evaluate effect of platelet rich plasma on the treatment of Grade II furcation involvement, with and without porous resorbable calcium carbonate($Biocoral^{(R)}$)in humans by digital subtraction radiography. 15 teeth(control group) were treated with porous resorbable calcium carbonate($Biocoral^{\(R)}$), and 15 teeth(test group) were treated with porous resorbable calcium carbonate($Biocoral^{(R)}$) and Platelet Rich Plasma. The change of bone density was assessed by digital subtraction radiography in this study. The change of mineral content by as much as 5%(vol) could be perceived in the subtracted images. The change of mineral content was assessed in the method that two radiographs are put into computer program to be overlapped and the previous image is subtracted by the later one. Both groups were statistically analyzed by Wilcoxon signed Ranks Test and Mann-whitney Test using SPSS program(5% significance level). The results were as follows: 1. In test group, the radiolucency in 3 months after surgry were significantly increased than 1 month after surgery(p<0.05). 2. In test group, there were no significant difference between 1 month after surgery and 6 months after surgery(p>0.05). 3. In test group, the radiopacity in 6 months after surgery were significantly increased than 3 months after surgery(p<0.05). 4. In control group, the radiolucency in 3 months and 6 months after surgery were significantly increased than 1 month after surgery(p<0.05). 5. In control group, the radiopacity in 6 months after surgery were significantly increased than 3 months after surgery(p<0.05). 6. There were no significant difference between test group and control group at 1 month, 3 months after surgery, but radiopacity in test group were significantly increased than control group at 6 months after surgery(p<0.05). In conclusion, Platelet Rich Plasma can enhance bone density.

• 대한전자공학회논문지SD
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• 제44권11호
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• pp.65-73
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• 2007

본 논문에서는 저비용 SoC 테스트를 위한 테스트 설계 기술에 대해서 다룬다. IEEE 1500 랩드 코어를 SoC TAP (Test Access Port) 을 통하여 스캔 테스트를 수행하는 방법을 제시하고, 지연고장 테스트를 위한 테스트 클럭 생성회로를 설계한다. TAP의 신호만을 이용하여 SoC 테스트를 수행함으로써 테스트 핀 수를 줄일 수 있고, SoC 내부의 회로를 사용하여 지연고장 테스트를 수행함으로써 저가의 테스트 장비를 사용할 수 있다. 실험을 통하여 제시한 방식의 효율성을 평가하고, 서로 다른 주파수의 클럭을 사용하는 여러 코어의 지연고장 테스트를 동시에 수행 할 수 있음을 확인한다.

• 한국구조물진단유지관리공학회 논문집
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• 제15권1호
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• pp.189-197
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• 2011

구조실험에서 정확성과 효율성을 높이기 위해서는 적절한 실험장치를 적용하는 것은 중요한 요소이다. 특히, 대규모의 구조 실험에서 적절한 실험장치는 비용과 시간을 절감할 수 있다. 액츄에이터와 유압잭 및 UTM은 실험체의 휨 능력을 평가하는 데 일반적으로 적용되고 있다. 그러나, 대규모 실험체에서 다점 다하중 가력하중이 적용되어야 하는 경우에는 기존의 UTM 등을 이용하는 실험방법은 정확한 하중을 가력하기에 어려움이 많다. 이를 해결하기 위하여 본 연구에서는 실험결과의 정확성과 효율성을 높이기 위하여 기존의 실험장치로 조합된 새로운 방법을 개발하였다.

• 대한전기학회논문지:전력기술부문A
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• 제55권8호
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• pp.322-328
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• 2006

In this paper, The impulse un-tripping characteristics and the electro magnetic compatibility characteristics are compared with each other. The performance of impulse un-tripping test exists at domestic standard (KSC 4613). However test items are insufficient because the more test items such as EMC exist at international standard (IEC). Also, Electric Appliances Safety Certificate has taken the certificate test since July 2004 in Korea but did not confirm the EMC performance for RCCBs made in Korea. Thus, in this paper, We experiment with Oscillatory waves immunity test and the 7 EMC tests for 32 RCCBs of 4 types (mini, home standard, plug, outlet) for 16 brands according to IEC standard 61009-1 and 61008-1. As a result, 24 RCCBs proved to be poor for surge immunity test. However the RCCBs operating incorrectly for surge immunity test operate correctly for oscillatory waves immunity test. Thus, the correlation between oscillatory waves immunity test and EMC test is little and standard for compatibility of combination surge at IEC 61000-4-5 should be added to KS standard as soon as possible.

• Journal of Preventive Medicine and Public Health
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• 제18권1호
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• pp.51-57
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• 1985

To attempt to measure the effect of domestic product P.H.A. kit 'Hepa-S' after completion of 'Hepa-Vax' vaccination schedule, P.H.A. test and R.I.A. test on the 330 healthy adults were carried out. The results obtained were as follow ; 1. The positive anti HBs rate after completion of 'Hepa-Vax' vaccination were; in P.H.A. test with domestic product P.H.A. kit 81.2%, in P.H.A. test with foreign product P.H.A. kit 82.7%, and in R.I.A. test 95.8% 2. Using the result of R.I.A. test as the standard, sensitivity of P.H.A. test with domestic product P.H.A. kit was 84.8% and specificity was 100.0% 3. Using the result of R.I.A. test as standard, sensitivity of P.H.A. test with foreign P.H.A. kit was 86.4% and specificity was 100.0%. 4. The concordance rate of P.H.A. test with domestic product and foreign product kit was 98.5%. On the result of this study, there was no significant difference in the validity between the domestic product P.H.A. kit 'Hepa-S' and the foreign P.H.A. kit $'Hebsgencell^{TM}'$. So that it is recommendable to use domestic product P.H.A. kit instead of foreign product P.H.A. kit.

• 한국동물위생학회지
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• 제21권3호
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• pp.313-323
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• 1998

In order to establish a sensitive and specific diagnostic method for detection of antibody to Salmonella pullorum, a enzyme-linked immunosorbent assay(ELISA) was designed and standardized. The diagnostic efficacy of the established ELISA was compared with that of the serum plate agglutination test and immunodiffusion test for pullorum disease. 1. The chicken hyperimmune sera to Salmonella pullorum, S gallinarum, S typhimurium and S typhi were shown the cross reaction to S pullorum antigen by serum plate agglutination test. 2. When compared the cross reaction titer of microplate agglutination test for chickens hyperimmune sera, it was found that the titer were 64 in S pullorum, 32 in S gallinarum, 4 in S typhimurium and 8 in S typhi, respectively. 3. When compared the specificity of various antigen(HA, EA, PA and SA) by the immunodiffusion test, the most suitable antigen was phenol-treated bactrium. 4. The optimal concentration of S pullorum antigen for ELISA was 1 : 160 dilution of bacterium. 5. The efficacy of the ELISA for detection of S pullorum antibody was compared with serum Plate agglutination test and immunodiffusion test in chickens infected with S pullorum. The antibody was first detected at 6 days after infection using three tests examined. The antibody was alldetected at 9 days by ELISA, at 12 days by serumplate agglutination test, at 15 days by immunodiffusion test.

• Computers and Concrete
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• 제20권1호
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• pp.39-47
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• 2017

In this paper, mode I fracture toughness of rock was determined by direct and indirect methods using Particle Flow Code simulation. Direct methods are compaction tension (CT) test and hollow centre cracked quadratic sample (HCCQS). Indirect methods are notched Brazilian disk (NBD) specimen, the semi-circular bend (SCB) specimen, hollow centre cracked disc (HCCD), the single edge-notched round bar in bending (SENRBB) specimen and edge notched disk (END). It was determined that which one of indirect fracture toughness values is close to direct one. For this purpose, initially calibration of PFC was undertaken with respect to data obtained from Brazilian laboratory tests to ensure the conformity of the simulated numerical models response. Furthermore, the simulated models in five introduced indirect tests were cross checked with the results from direct tests. By using numerical testing, the failure process was visually observed. Discrete element simulations demonstrated that the macro fractures in models are caused by microscopic tensile breakages on large numbers of bonded discs. Mode I fracture toughness of rock in direct test was less than other tests results. Fracture toughness resulted from semi-circular bend specimen test was close to direct test results. Therefore semi-circular bend specimen can be a proper test for determination of Mode I fracture toughness of rock in absence of direct test.

• 한국안광학회지
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• 제5권2호
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• pp.49-53
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• 2000

컴퓨터를 이용하여 굴절검사를 하기 위하여 모니터에서 출력한 영상시표를 제작하고자 영상시표와 한식표준시력표, Chart Projecter에서의 시표의 크기 및 시력을 비교한 결과 다음과 같은 결론을 얻었다. 1. 시표의 문자나 숫자에서 각각 다른 인식 차가 있었으며 시시력표에서 시표의 크기가 글자에 따라 다르게 제작하여야 할 것으로 조사되었다. 한글과컴퓨터사의 "솔체"글자모양으로 제작된 시력 0.1의 시표는 문자시표에서는 "가"는 69 mm "그"는 66 mm 숫자시표의 "7"은 57 mm. "2" "3"는 60 mm. "4" "5" "6" "9" "8" 숫자는 63 mm의 크기로 조사되었다. 2. 영상시표와 한식표준시력표, Chart Projecter에서의 시력을 비교 결과 영상시표의 시력이 가장 낮았다. 3. 양안 분리시표는 Chart Projecter와 비교하여 양안 분리 및 프리즘렌즈에 의한 시표의 변화는 모두 동일하게 조사되었으나 한글의 이용과 더 다양한 디자인의 시표 제작 할 수 있어 효과적인 굴절검사를 할 수 있을 것으로 보인다.

• 아동학회지
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• 제35권1호
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• pp.61-76
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• 2014

This study examined the effects of perfectionism and cognitive-emotion regulation strategies on the test anxiety. The participants in this study were 423(227 boys, 196 girls) 6th graders recruited from four elementary schools in Seoul, Korea. The participants completed the Test Anxiety Inventory-Korea(Kim, 1991), the Child and Adolescent Perfectionism Scale(CAPS; Flett at al, 2000), and the Cognitive-Emotion Regulation Questionnaire(CERQ; Garnefski, 2001). The results of this study were as follows. First, self-oriented perfectionism and socially prescribed perfectionism were both positively associated with test anxiety. Additionally, the children who used more adaptive cognitive-emotion regulation strategies reported lower test anxiety, whereas the children who used more maladaptive cognitive-emotion regulation strategies reported higher test anxiety. Secondly, there was an interactional effect between self-oriented perfectionism and maladaptive cognitive-emotion regulation strategies on test anxiety. Lastly, socially prescribed perfectionism and cognitive-emotion regulation strategies had a significant effect on children's test anxiety. However, there were no interactional effects observed between socially prescribed perfectionism and cognitive-emotion regulation strategies on test anxiety.

• 대한전자공학회:학술대회논문집
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• 대한전자공학회 1998년도 추계종합학술대회 논문집
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• pp.1069-1072
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• 1998

Recently the development of design and automation technology and manufacturing method, has reduced the cost of chip, but it becomes more difficult to test IC chip because test technique doesn't keep up with these techniques. In case of IC testing, obtaining test vectors to be able to detect good chip or bad one is very important, but according to increasing complexity, it is very complex and difficult. Another problem is that during testing, there could be capability of physical and electrical damage on chip. Also there is difficulty in synchronization between CUT (circuit under test) and Test equipment〔1〕. Because of these difficulties, built in self test has been proposed. Not only obtaining test vectors but also reducing test time becomes hot issues nowadays. This paper presents a new test BIST(built in self test) method. Proposed BIST implementation reduces test time and obtains high fault coverage. By searching internal nodes in which are inserted test_point_cells〔2〕and allocating TPG(test pattern generation) stages, test length becomes much shorter.