• 한국작물학회지
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• 제52권2호
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• pp.183-197
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• 2007

Field trial was conducted at the Research Farm of the Katsina State Agricultural and Rural Development Authority during the farming season of 2004 with a view to evaluate/determine the efficacy of some selected plant-derived biopesticides against the insect pests of cowpea as well as their effect on yield. The variety of the cowpea used was IT86D-719 and the plant derived biopesticides evaluated during the trial were chilli pepper, garlic, ginger, neem, sweetsop and tobacco. The experimental field was ploughed, harrowed and thereafter ridged before the commencement of the 2004 planting season. A total of twenty one (21) experimental plots were demarcated and arranged into seven treatment plots. The size of each plot was $5m{\times}4m$ while interspaces between adjacent plot and blocks were 1m and 2m, respectively. Results of the experiments showed that all the plant-derived biopesticide treatments were significantly (p>0.05) better than control treatment. The order of effectiveness of the treatments was tobacco (80-90%), sweetsop (75-85%), garlic (70-80), neem (72-78%), chilli pepper (60-70%) and ginger (30-50%). Furthermore, yield result corresponded positively with the effectiveness of the treatments. Results of the present finding suggest the use of tobacco, sweetsop and garlic as promising biopesticides in the control of cowpea insect pests.

• Preventive Nutrition and Food Science
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• 제16권1호
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• pp.55-61
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• 2011

A survey aiming to find out the chemical and textural properties of commercial fermented soy bean curd called sufu was conducted. Sixteen brands of plain sufu produced in the Northern or the Southern part of China were collected and examined for their crude protein, crude fat, texture profiles, free amino acids, and free fatty acid contents. Twenty-one free amino acids were extracted and derivatized using a commercial kit followed by separation and analyzed by the gas chromatography-mass spectrometry (GC-MS). Similarly, ten free fatty acids were extracted using alumina, eluted, separated and analyzed. The content ranges of crude fat and protein were 22~36% and 31~38%, respectively. In texture profile analysis, ranges of the texture parameters were 131~493 g (hardness), 0.4~0.5 (cohesiveness), -137 to -50 gs (adhesiveness), 0.6~1 (springiness), 47~220 g (gumminess) and 32~177 g (chewiness). Twenty-one different free amino acids, especially alanine, glycine, $\alpha$-aminobutyric acid, valine, leucine, allo-isoleucine, aspartic acid, glutamic acid and lysine in large amount, as well as ten fatty acids in total, notably linoleic acid (9-octadecanoic acid), oleic acid (9,12-octadecadienoic acid), linolenic acid (9,12,15-octadecadienoic acid), hexadecanoic acid and octadecanoic acid were found. This information provides important quality reference ranges for product developers and manufacturers to optimize and produce the plain sufu.

• 한국전자파학회논문지
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• 제28권6호
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• pp.505-508
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• 2017

본 논문은 CMOS 공정에 수반되는 메탈 더미 구조가 서브 테라헤르츠 온칩 마이크로스트립 패치 안테나의 성능에 미치는 영향을 분석하였다. 45 nm CMOS 공정을 이용해 400 GHz 온칩 안테나를 설계하고, 3D EM 시뮬레이션을 통하여 메탈 더미 구조의 밀도에 따른 안테나의 공진주파수와 효율을 분석하였다. 검증을 위해 발진기와 집적된 안테나를 설계/제작하고, FTIR과 볼로미터를 이용한 준광학적 방법을 통해 측정을 수행하였다. 측정 결과, 밀도가 27 %인 더미 구조에 의해 안테나의 복사전력이 417 nW에서 87 nW로 6.8 dB 감소하는 것을 확인하였다.

• Journal of applied mathematics & informatics
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• 제24권1_2호
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• pp.325-331
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• 2007

To the unconstrained programme of non-convex function, this article give a modified BFGS algorithm associated with the general line search model. The idea of the algorithm is to modify the approximate Hessian matrix for obtaining the descent direction and guaranteeing the efficacious of the new quasi-Newton iteration equation $B_{k+1}s_k=y^*_k,\;where\;y^*_k$ is the sum of $y_k\;and\;A_ks_k,\;and\;A_k$ is some matrix. The global convergence properties of the algorithm associating with the general form of line search is proved.

• 재활치료과학
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• 제1권1호
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• pp.17-28
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• 2012

목적 : 본 연구의 목적은 과제 지향적 프로그램이 뇌졸중 환자의 균형과 상지기능에 미치는 효과에 대해 알아보고자 단일 사례 연구를 실시하였다. 연구방법 : 연구 대상자는 뇌졸중 진단을 받은 자로 균형검사는 Time up & go 검사, Nintendo Wii Balance Board Test로 실시하였고, 상지기능은 Manual Function Test(MFT)로 측정하였다. 과제지향적 프로그램은 운동처리 기술평가(AMPS)의 표준화된 과제 중 셔츠다리기, 자루걸레로 바닥 청소하기, 창문 청소하기, 손빨래하기를 환자에게 맞게 수정 보완하여 실시하였다. 이에 대한 결과는 다음과 같다. 결과 : 환자의 동적 균형능력은 기초선 평균 51.53에서 42.62로 향상되었고, 정적 균형능력은 기초선에서는 좌우 균형차이가 평균 13.8 났으나, 중재 후 좌우 균형차이가 6.29로 보다 0에 가까워져 좌-우 균형이 안정되었음을 확인할 수 있었다. 또한 상기기능은 MFT 검사결과 평균이 6점에서 7.6점으로의 증가 되었다. 결론 : 일상생활활동 과제로 구성된 과제지향 프로그램은 뇌졸중환자의 균형과 상지기능 향상에 영향을 미칠 수 있다. 따라서 향후 본 연구의 결과를 일반화 시킬 수 있도록 다양한 유형과 특성을 가진 뇌졸중 환자들에 대한 연구가 지속되어야 할 것이다.

• 과학기술학연구
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• 제1권1호
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• pp.51-68
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• 2001

사회적 차원에서의 '과학문화'는 심리적 차원에서의 '과학교양, 과학적 소양'의 개념과 반드시 상관성을 지닌다. 성숙된 과학문화를 발전시키기 위해서는 우선, '과학문화의 평가가능성'에 대한 신념과 더불어 '평가기준의 모색'이 전제되어야 한다. 본 논문은 이러한 두 가지 전제에 바탕을 두고, OECD 주관 하에 시행중인 PISA (Programme for International Student Assessment)가 채택한 '과학적 소양'의 개념이 어떠한 과학철학적-인지과학적 배경 위에 서 있는지를 분석한다. 그리고 실제로 활용된 예제 문항들을 검토해보고, 결론적으로 PISA의 '과학적 소양' 개념은 <논리경험주의, 자연주의 과학철학, 사회적 구성주의>의 세 가지 입장이 함께 상보적으로 반영되었음을 주장한다. 마지막으로 최근의 과학철학적-인지과학적 연구에 입각해, 과학문화의 증진을 위해 보다 적극적인 과학적 소양 개념이 필요하며, 장차 그러한 과학적 소양 개념에 반영되어야 할 점 몇 가지를 제안한다.

• 호남수학학술지
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• 제41권2호
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• pp.329-342
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• 2019

In this paper, we give a geometric approach to Killing magnetic flux surfaces in Euclidean 3-space and solve the differential equations which expressed the mentioned surfaces. Furthermore we give some examples and draw their pictures by using the programme Mathematica.

• 환경위생공학
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• 제22권2호
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• pp.75-84
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• 2007

A lysine determination method for low quantity of rice was modified from the original Dye-Binding Lysine (DBL) method used in the national standard in China [GB 4801-84, 1984]. By making use of the property that lysine does not bind to the crocein orange G dye after treated with propionic anhydride, the amount of lysine in rice samples could be determined directly by calculating the difference between the absorbances of the treated and the untreated samples. Various commercial rice samples were purchased from market and evaluated. Several methods were tested by varying both the sizes of the samples and the concentrations of the dye solutions. Results showed that when using 1.284 mM of crocein orange G dye solution and 15.5 mg of sample, the results were most reproducible. The corresponding lysine content in sample were $3.36\;{\pm}\;0.09\;mg/g$ and $3.35\;{\pm}\;0.19\;mg/g$ by traditional method and modified method, respectively. Statistically, there was no significant difference between the results (p>0.05).

• Preventive Nutrition and Food Science
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• 제16권1호
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• pp.45-54
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• 2011

Volatile components in commercial pine needle (Pinus densiflora S. and Z.) powder were extracted using simultaneous steam distillation and a solvent extraction (SDE) apparatus, and were analyzed by gas chromatography-mass spectrometry (GC-MS). A total of 230 compounds divided into 13 groups were identified, which included alcohols (42), ketones (39), aldehydes (32), terpenes (30), alkenes (17), esters (14), furans (14), benzenes (10), alkanes (8), napthalenes (7), acids (6), miscellaneous compounds (6), and phenols (5). Among the 230 compounds identified, 96 compounds were positively confirmed and quantified, and the rest of the compounds were tentatively identified. The major volatile components identified at relatively high levels were dodecanoic acid, hexadecanoic acid, hexanal, benzaldehyde, (Z)-3-hexen-1-ol, 1-penten-3-one, limonene, and $\beta$-caryophyllene oxide. Among the groups, terpenes accounted for 60.18% of the total concentration of all the volatile components. Some volatile components might account for the unique aroma and the biological activity of the sample.

• Nutrition Research and Practice
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• 제14권3호
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• pp.298-298
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• 2020