• 우유
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• s.49 summer
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• pp.44-47
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• 1992

한국유가공협회는 지난 5월12일 서울 서초동소재 축산회관대강당에서 ‘우유 및 유제품의 위생관리와 소비자 보호’란 주제로 세미나를 개최했다. 이날 세미나에서는 정충일 건국대교수가 ‘우유와 유제품의 위생관리’, 김태섭 보사부 위생관리과장이 ‘92위생시책 및 위생관리방향’, 김천주 주부클럽연합회장이 ‘유제품과 소비자보호’란 제목으로 주제발표를 했다. 본지는 여름철 유제품 위생관리를 위해 이중 ‘우유 및 유제품위생관리’를 전개한다.

• 월간산업보건
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• s.263
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• pp.6-12
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• 2010

포항지역의 용접공 3명에서 망간에 의한 것으로 보이는 이상소견이 나타났고, 이로 인해 우리나라 산업보건계에는 큰 질문들이 던져졌음을 지난달에 소개하였다. 이번 호에는 이러한 질문에 대한 답을 제시하기 위해 산업안전보건연구원이 수행한 전국 망간 역학조사를 소개하고자 한다.

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2010.11a
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• pp.889-890
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• 2010

• Vending industry
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• v.2 no.6 s.7
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• pp.92-94
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• 2003

작년에 첫선을 보여 많은 화제를 불러 일으켰던 DVD대여판매기가 새로운 사업 주체인 모렉스테크놀로지에 의해 시장 전개가 모색이 되고 있다. DVD시대의 본격 도래와 함께 무인 대여 판매시스템으로 선보인 이 제품은 첨단제품 성능과 사용 편리성에다가 관리 효율성까지 갖추고 있어 시장에 적지 않은 반향을 불러일으킬 것으로 기대된다. 본격 가맹점 모집을 통해 DVD대여판매기의 적극 보급에 나선 모랙스테크놀리지의 사업행보를 살펴 봤다

• Digital Contents
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• no.7 s.74
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• pp.72-75
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• 1999

기업을 둘러싼 급격한 환경의 변화와 이에 대응하려는 기업의 노력이 끊임없이 전개되고 있다. 정보화 사회에서 뒤지지 않으려는 기업들의 노력은 기업 전체적으로 통합된 정보시스템(ERP)을 구축함으로써 시장경쟁에서 정보기술을 무기로 우위를 확보하려고 하고 있다. 각 기업들이 경쟁적으로 도입하고 있는 ERP의 구축동향과 시장전망을 조명해 보는 것은 매우 의미 있는 일이다.

• Journal of Convergence for Information Technology
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• v.11 no.12
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• pp.14-21
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• 2021

In this paper, it is shown how the performance of the monopulse algorithm in the presence of an additive noise can be obtained analytically. In the previous study, analytic performance analysis based on the first-order Taylor series and the second-order Taylor series has been conducted. By adopting the third-order Taylor series, it is shown that the analytic performance based on the third-order Taylor series can be made closer to the performance of the original monopulse algorithm than the analytic performance based on the first-order Taylor series and the second-order Taylor series. The analytic MSE based on the third-order Taylor approximation reduces the analytic MSE error based on the second-order Taylor approximation by 89.5%. It also shows faster results in all cases than the Monte Carlo-based MSE. Through this study, it is possible to explicitly analyze the angle estimation ability of monopulse radar in an environment where noise jamming is applied.

• 한국지구물리탐사학회:학술대회논문집
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• 2008.10a
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• pp.47-50
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• 2008

Streamer resistivity surveys in shallow marine environments were carried out to analyze sediment characteristics at the bottom of reservoir. Because the resistivity values of reservoir water are very low and those of sediment are relatively high, apparent resistivity values increase with depth. And it is necessary to eliminate the apparent resistivity data decreased highly when the number of separation increases. According to the repeated data processing, we proposed the resistivity ratio of upper-to-lower layer is $0.6{\sim}0.8$ because the RMS error of inversion leads to the minimum in these range. As a result of the inversion for two- and three-layer model, the inversion including water depth is proved to be more effective than conventional method.

• Journal of the Korean Society for Precision Engineering
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• v.28 no.8
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• pp.959-965
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• 2011

This paper presents the dynamic modeling and vibration suppression methods for axially deploying beams subjected to gravity. A modal modeling method is employed to develop the lateral vibration model for axially deploying beams. Simulation is made to validate the proposed model as well as to investigate the dynamics of axially deploying beams. This paper rigorously investigates the gravity effect as a source of vibration for axially deploying beams. In order to suppress lateral vibration for deploying beams, the moving speed command is modified by using the input shaping method, Experiments are also performed to prove the proposed vibration suppression method. The simulations and experiments show that the proposed modeling and input shaping methods are effective for the dynamic analysis and vibration suppression of axially deploying beams subjected to gravity.

• Transactions of the Korean Society of Mechanical Engineers
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• v.17 no.1
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• pp.11-20
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• 1993

Sensitivity information is required in the optimal design process. In structural optimization, sensitivity calculation is a bottleneck due to its complexities and expensiveness. Various schemes have been proposed for the calculation. Analytic and finite difference methods are the most popular at the present time. However, they have advantages and disadvantages in different ways. Semi-anayltic method has been suggested to overcome the difficulties. In spite of the excellency, the semi-analytic method has been found to possess numerical error quite much with respect to shape variables. In this research, the error from each method is evaluated and compared using a shape variable. A two-dimensional beam is selected for an example since it has mathematical solution. An efficient method is suggested for the structural optimization which utilizes finite element method.

• Journal of the Society of Naval Architects of Korea
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• v.37 no.4
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• pp.66-74
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• 2000

In this paper, hydroelastic responses of the very large floating structure are studied based on the linear potential theory. A theoretical method is developed to analyze the hydroelastic reponses of very large floating structures(VLFS) using the pressure distribution method and the modal expansion method. The singularities distributed on a zero draft plate at the free surfaces and hydrodynamic pressures are evaluated. The deflections of structure are expanded approximately in terms of natural mode functions of free-free beam. The calculated items are pressure distributions. vertical motions, hydrodynamic coefficients and bending moments of VLFS. The numerical results are compared with those measured by experiments.