• Nuclear Engineering and Technology
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• v.33 no.3
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• pp.349-354
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• 2001

While the United Nations UN) agencies work to restrict the manufacture, sale, and use of land-mines worldwide, a massive clean-up effort is needed to find and destroy the estimated 100 million land-mines still buried around the world. Land-mines left behind from wars worldwide are one of the past century＇s main unsolved problems of war and remain the focus of humanitarian land-mine detection and removal primarily in Europe, Africa, Asia and Central and South America. For example, approximately 1 million anti-personnel mines and other various kinds which have been buried in the 249.4 km (155 miles) demilitarized zone (DMZ) of the Korean peninsular should be completely removed in historical process of the peaceful unification between South and North Korea. In this regard, the current trends of technologies linked to land-mine detection systems are surveyed.

• The Korean Journal of Malacology
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• v.31 no.3
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• pp.249-252
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• 2015

An aeolid nudibranch species Flabellina athadona (Bergh, 1875) is newly recorded from Korean waters. This species is distinguished from other congeneric species by the following characteristics: translucent white body, deep orange colored digestive glands, plenty of white specks, and a reversed Y-shaped marking on the head between rhinophores and oral tentacles. In this report, we also provide an identification key for the genus Flabellina in Korea, photographs, and diagnostic characteristics of F. athadona. Molecular identification using mtDNA cox1 partial sequences is also provided to help differentiate F. athadona from some of its closely related congeneric species.

• Journal of the Korean Institute of Intelligent Systems
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• v.14 no.2
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• pp.247-252
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• 2004

In this paper are proposed 2nd-order PD-type iterative learning control algorithms for linear continuous-time system and linear discrete-time system. In contrast to conventional methods, the proposed learning algorithms are constructed based on both time-domain performance and iteration-domain performance. The convergence of the proposed learning algorithms is proved. Also, it is shown that the proposed method has robustness in the presence of external disturbances and the convergence accuracy can be improved. A numerical example is provided to show the effectiveness of the proposed algorithms.

• 유체기계공업학회:학술대회논문집
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• 2000.12a
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• pp.247-252
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• 2000

Flow through turbine flow meter is simulated by solving the incompressible Navier-Stockes equations. The solution method is based on the pseudocompressibility approach and uses an implicit-upwind differencing scheme together with the Gauss-Seidel Line relaxation method. The equations are solved steadily in rotating reference frames and the centrifugal force and the Coriolis force are added to the equation of motion. The standard k-$\epsilon$ model is employed to evaluate turbulent viscosity.

• Proceedings of the Korean Operations and Management Science Society Conference
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• 2003.05a
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• pp.252-257
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• 2003

공급체인관리(SCM)에서, 고객의 반응에 민감하게 반응할 수 있기 위해서는 무엇보다도 부품이나 자재를 공급하는 협력업체의 능력이 중요한 요인으로 작용한다. 본 논문은 퍼지이론을 이용하여 과학적인고 효율적으로 협력업체를 평가하고, 우수협력업체를 선정하는데 있다. 협력업체의 평가를 위하여 여러 가지 요인을 분석하여야 하는데, 이런 요인들 중에는 수치적으로 표현 가능한 정량적인 요인이 있는 반면에, 협력업체 제품의 품질이나 재정적 상태와 같은 수치적으로 표면 불가능한 정량적인 요인도 포함되어 있다. 본 논문에서는 정량적인 요인과 정성적인 요인을 퍼지추론(Fuzzy Inference)을 통해 분석함으로써 협력업체를 평가하고 최우수 협력 업체를 선정하여, SCM환경에서 성공적인 협력관계를 지속적으로 유지할 수 있는 방법론을 제시하고자 한다.

• Proceedings of the KSPS conference
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• 2007.05a
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• pp.163-166
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• 2007

Our present study was performed to investigate acoustically the Chines normal adults' voices. 60 Chines normal adults (30 males and 30 females) of the age of 20 to 39 years oridyced systained vowel /a/ and, by analyzing them acoustically with Dr. Speech, we could get the fundamental frequency (Fo), jitter, shimmer, NNE. As results, on the average, male voices showed 1I8.1Hz in Fo, 0.186% in jitter, 1.12% in shimmer, and -13.7dB in NNE. And, female voices showed 252.4Hz in Fo, 0.186% in jitter, 0.81% in shimmer, and -1I.3dB in NNE. Every parameter except Fo showed no significant difference between male and female voices.

• Journal of the Chungcheong Mathematical Society
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• v.29 no.2
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• pp.287-328
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• 2016

In the current work, we define and find the general solution of the decic functional equation g(x + 5y) - 10g(x + 4y) + 45g(x + 3y) - 120g(x + 2y) + 210g(x + y) - 252g(x) + 210g(x - y) - 120g(x - 2y) + 45g(x - 3y) - 10g(x - 4y) + g(x - 5y) = 10!g(y) where 10! = 3628800. We also investigate and establish the generalized Ulam-Hyers stability of this functional equation in Banach spaces, generalized 2-normed spaces and random normed spaces by using direct and fixed point methods.

• Korean Journal of Pharmacognosy
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• v.2 no.1
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• pp.39-40
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• 1971

An alkaloidal component was extracted from the root of Aconitum koreanum R. $R_{AYMOND}$ of the commercial origin. Crude extract was obtained in ca. 2% yield out of dried root with ether-methanol (10:1). White amorphous compound was precipitated out from the HCl solution upon the addition of ammonia water, and crude base was obtained by extraction of its mother liquid with chloroform. This crude base was purified by the alumina-column chromatographic method. A pure alkaloidal component(500mg) was yielded from its crude base. Its pure base comes as needle crystals melting at $250{\sim}252^{\circ}C$ (decomp.), $[\alpha]^{20}_D$ D+9.82 (methanol) and Anal. calcd. for $C_{19}H_{27}O_{8}N$.

• 한국정보교육학회:학술대회논문집
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• 2004.01a
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• pp.252-259
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• 2004

고도의 산업화로 직업의 전문화 세분화 현상이 가속화되면서 개인으로 하여금 자신의 진로를 계획하고 준비하여 진로를 선택하게 하고, 선택한 진로를 계속 발전시켜 나갈 수 있도록 도와주는 과정인 진로교육의 필요성이 날로 증가하고 있다. 특히 진로 인식의 단계에 해당하는 초등학교 시기의 진로교육은 진로교육의 출발점에 해당하며 다음 단계의 진로교육에 영향을 미친다는 점에서 중요성을 가진다. 하지만 그 중요성에도 불구하고 시간과 자료의 부족으로 일선 초등학교에서는 지속적이며 체계적인 지도가 이루어지지 않고 있다. 이러한 문제를 체결하기 위하여 본 연구에서는 진로교육에 인터넷을 도입하여 시간과 공간의 제약이 업고, 개별 학습이 가능한 인터넷의 장점을 지니면서 초등학생들의 진로교육 단계와 진로 발달 수준에 적합한 웹 기반 진로교육 시스템을 설계해 보았다.

• Proceedings of the Korean Society for Quality Management Conference
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• 2004.04a
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• pp.248-252
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• 2004

본 논문에서는 신상품개발 활동의 효율적인 수행을 위하여 개발된 CUPID(Creative Utility for Product planning and Intelligent DFSS:이하 CUPID로 약칭)라는 소프트웨어를 가지고 짧은 시간에 효율적으로 개발이 이루어 질 수 있는 방안을 제시해 보고자 한다. 현재 개발부문의 6시그마 경영혁신 활동인 DFSS 추진을 위하여 많은 기업이 시간과 자원을 투입하고 있으나, 그 내용이 너무 방대하여 개발부문에 부담으로 작용하고 있는 상황으로 CUPID를 이용하여 간단히 핵심품질인 CTQ의 품질목표 달성을 이루어 가는 과정을 제시하고자 한다.