• 한국어병학회지
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• 제28권1호
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• pp.37-42
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• 2015

본 연구에서는 넙치 (평균체장 및 무게: $20{\pm}2.0cm$, $70{\pm}5.0g$)에 옥시테트라사이클린(oxytetracycline, OTC)-네오마이신(neomycin, N) 복합제를 25-10 ppm 및 50-20 ppm으로 용해하여 2일 동안, 3시간씩 약욕을 실시하였고, 약물투여 중지 후 1일, 5일, 14일, 40일째에 시험군별로 각각 5마리씩 넙치의 근육을 채취하여 항생제 잔류농도를 조사하였다. OTC와 N 표준용액을 농도별로 희석하여 표준곡선을 작성한 결과 각각 $R^2=0.9999$, $R^2=0.9952$로 양호한 직선성을 나타내었고, OTC와 N 회수율은 각각 90~93%, 88~95%가 관찰되었다. 잔류농도에 대한 측정결과, OTC와 N 복합제를 25-10 ppm 투여한 시험군에서 1일째 OTC는 $0.97{\pm}0.084{\mu}g/ml$이 검출되었고, N은 $0.118{\pm}0.079{\mu}g/ml$이 검출되었으나 5일째 이후부터 검출이 되지 않았다. OTC와 N 복합제를 50-20 ppm 투여한 시험군에서 1일째 OTC는 $1.324{\pm}0.062{\mu}g/ml$이 검출되었고 N은 $0.788{\pm}0.05{\mu}g/ml$이 검출되었으나 5일째 이후부터 검출이 되지 않았다.

• 한국자동차공학회논문집
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• 제2권1호
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• pp.73-83
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• 1994

Press formabilities of aluminum sheets for automobile body were investigated. Plane strain stretching test (called RIST-PSST), cupping test and U bending test were performed to assess the press formability of aluminum sheets respectively. The results showed that aluminum sheets are generally inferior to cold-rolled steel sheet of deep drawing quality (CSP3N) in press formability. The limiting punch height (LPH) and limiting plane strain (FLCo) of aluminum sheets are 50%-70% level compared to that of CSP3N. Moreover, the limiting drawing ratios(LDR) of aluminum sheets are ranged between 1.95 and 2.1. The poor press formability of aluminum sheets is responsible for low values of total elongation and plastic anisotropy parameter in tensile characteristic. The shape fixability of aluminum sheets evaluated in U bending test is very poor due to its low elastic modulus compared to CSP3N.

• 한국가정과교육학회지
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• 제7권1호
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• pp.1-10
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• 1995

This study was intended to provide an improved method for testing textiles in high school. Four kinds of test subjects were selected and applied to the classes. Problems of the methods in the textbooks were corrected as follows: 1)Burning test: The number of specimen is reduced to 3 kinds of fibers(cotton, wool, and polyester) and recommends are given to make result by comparing with the burning characteris-tics of paper and hair. 2) Absorbency test: Test Method is changed to drop test. The result is recorded by measuring time required for the water drops absorbed to the specimen. 3) Wrinkle recovery test: A glass is provided instead of metal weight. The method of measuring angle which is made by the specimen is shown in figure. 4) Effects of Detergent: 0.2% of detergent solution is provided before class. The amount of oil and carbon black is specified. Students have generally agreed that the improved methods were better than those in the text-books after they made the above 4 recommendable experiments(p<.001)

• 한국신재생에너지학회:학술대회논문집
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• 한국신재생에너지학회 2011년도 추계학술대회 초록집
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• pp.35.2-35.2
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• 2011

A wind turbine power performance test is very important to wind turbine manufacturers because a wind farm developer or planner must want to define power performance characteristics and reliability of new wind turbines. Based on the IEC 61400-12-1, A wind turbine test site has to be nicely installed at flat terrain for testing. We are developing the wind power system which is IEC wind class IIa model with rated power of 3MW. KEPCO's Gochang power testing center was considered as candidates to build the test site without site calibration. This paper aims to verify the validity of the test site by using implement site assessment result that was based on IEC 61400-12-1.

• 한국안전학회지
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• 제33권4호
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• pp.15-20
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• 2018

In this study, we have performed the Cone Calorimeter test and Smoke density test in accordance with ISO 5660-1 and ASTM E662 respectively to check the smoke production characteristics of rubber flooring materials for railway vehicle. Early in the ASTM E662 test, more smoke was produced in the flame mode test than non-flame mode test, but later more smoke was produced in non-flame mode test. The correlation($R^2$) between TSR(Total Smoke Release) by ISO 5660-1 and Ds(Specific Optical Density) by ASTM E662 Flame mode was 0.782. The $R^2$ between TSR by ISO 5660-1 and Ds by ASTM E662 Non-flame was 0.930.

• 대한방사선기술학회지:방사선기술과학
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• 제4권1호
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• pp.55-62
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• 1981

This study was conducted, during the period of 20-30th, July in 1981, to survey measurement methods in thyroid uptake rate test in Seoul city. The results were summarized as follows: 1. For the great part of nuclear medcine department, a mount of radioiodine($^{131}I$) administrated to the patients was $50-100{\mu}Ci$ in thyroid uptake rate test. 2. Distribution of scintillation, counter with crystal size of $1\frac{1}{2}inch$ was 43%, 3inch(22%), 2.5inch(14%) and $2\frac{1}{2}inch$ was 7% in RAI uptake rate test. 3. When RAI uptake rate test was performed, distribution of collimator in use was flat field type collimator(78%) in general and cylindrical type collimator was 22%. 4. High voltage applied to the P-M tube was $900{\sim}1000V$(50%) and most units provided $3{\sim}15%$ of the window range for the $^{131}I$ peak $\gamma-ray$ energy. 5. Distribution on the use of neck phantom for measurements standard solution was 57% and distribution of b filter in use for room background counts and extrathyroidal tissue was 43% and 50%. 6. The distance between the counter and the source was 25cm(58%) in measuring radioactivity of standard solution, thyroid tissue and background radioactivity count. 7. The early uptake measurements(2, 4, 6 hours) are done after administration of the radioiodine dose and also 24-hour and 48-hour uptake measurements are done in routine test.

• 아시안잔디학회지
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• 제3권1호
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• pp.13-15
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• 1989

In oder to find out the effective seed germination testing method to the field emergence, an experiment was conducted ; 1. TTC testing results were higher percentage than any other germination testing methods . 2. On the corn seed , field emergence was highly correlated with germinator test, TTC test and AA test hut cold test was lower percentage . 3. Field emergence , on the soybean seeds was highly correlated with AA test and cold test but germinator test and TTC test was higher percentage .

• Journal of the Korean Statistical Society
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• 제34권4호
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• pp.367-375
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• 2005

This paper presents an autocorrelation test that is applicable to dynamic panel data models with serially correlated errors. The residual-based GMM t-test is a significance test that is applied after estimating a dynamic model by using the instrumental variable (IV) method and is directly applicable to any other consistently estimated residuals. Monte Carlo simulations show that the t-test has considerably more power than the $m_2$ test or the Sargan test under both forms of serial correlation (i.e., AR(1) and MA(1)).

• 유기물자원화
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• 제25권4호
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• pp.23-29
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• 2017

본 연구는 조사료 생산 분야에서 화학비료를 사용하는 관행농법에서 벗어나 유기재배 기술개발을 위하여 관행재배와 유기재배의 수량성, 사료가치 등을 비교 조사하였다. 시험은 전남 강진군 작천면 소재 축산연구소의 논에서 수행하였다. 유기질 비료로는 질소성분이 4.0% 함유된 유박비료를 이용하였으며, 시험구 편성은 대조구(Con)와 대조구 질소 함량 기준으로 환산하여 유박비료 100% 처리구(T1), 유박비료 150% 처리구(T2), 유박비료200% 처리구(T3)로 구성 하였다. 시험품종은 수수${\times}$수단그라스 교잡종(SX17)을 5월 25일에 ha당 40kg을 휴립세조파(조간 50cm)로 파종하였다. 수확기 처리구별 초장은 대조구 317cm, T1 252cm, T2 269cm, T3 293cm으로 대조구가 가장 우수하였고, 시비 처리구에 따른 시험구에서는 시비량의 증가에 따라 증가하였고, 건초량은 대조구 11.386kg/ha, T1 6,015kg/ha, T2 6,799kg/ha, T3 7,627kg/ha으로 초장의 생육과 동일한 경향을 보였다. 조단백질은 대조구 7.0%, T1 5.7%, T2 6.3%, T3 5.1%로 시험 처리구에서는 T2에서 가장 높았다. 이와 같은 결과로 유박비료를 대조구 시비량 질소 함량 대비 150% 시비에서 사료가치는 유의적 차이를 보이지 않았으나, 초장과 건초량이 증가가 이루어졌으므로 150% 기준으로 시비하는 것이 적합할 것으로 판단된다.

• Clinical and Experimental Pediatrics
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• 제54권10호
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• pp.405-408
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• 2011

Purpose: In autumn 2009, the swine-origin influenza A (H1N1) virus spread throughout South Korea. The aims of this study were to determine the clinical characteristics of children infected by the 2009 H1N1 influenza A virus, and to compare the rapid antigen and realtime polymerase chain reaction (PCR) tests. Methods: We conducted a retrospective review of patients ${\geq}18$ years of age who presented to Soonchunhyang University Hospital in Seoul with respiratory symptoms, including fever, between September 2009 and January 2010. A real-time PCR test was used to definitively diagnose 2009 H1N1 influenza A infection. Medical records of confirmed cases were reviewed for sex, age, and the time of infection. The decision to perform rapid antigen testing was not influenced by clinical conditions, but by individual factors such as economic conditions. Its sensitivity and specificity were evaluated compared to real-time PCR test results. Results: In total, 934 patients tested positive for H1N1 by real-time PCR. The highest number of patients (48.9%) was diagnosed in November. Most patients (48.2%) were aged between 6 and 10 years. Compared with the H1N1 real-time PCR test results, the rapid antigen test showed 22% sensitivity and 83% specificity. Seventy-eight patients were hospitalized for H1N1 influenza A virus infection, and fever was the most common symptom (97.4%). Conclusion: For diagnosis of 2009 H1N1 influenza A virus infection, the rapid antigen test was inferior to the real-time PCR test in both sensitivity and specificity. This outcome suggests that the rapid antigen test is inappropriate for screening.