• 펄프종이기술
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• 제48권1호
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• pp.134-141
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• 2016

Dampening in printing is not only used with plain water but also used with various substances like dampening additive, in order to improve the wetting property by lowering the surface tension and to control material for modifing the ink transfer characteristic with proper emulsification. We have studied the printing quality according to these, looking into interrelationship among the dampening solution's pH, electrical conductivity and IPA content, prescribing the proper usage and minimum usage of fountain solution and dampening additive. In this study, it shows good result when mixing at the 7 wt% dampening with additive solution, which is result from the color density of printed sheets in accordance with the change of dampening solution condition. And the printed density value calculated 1 hour after printing, it shows relatively safe value at the etch liquid 4 wt% and IPA addition 2 wt%. The dry down at this test showed similar results regardless of various dampening conditions on coated paper, but in case of uncoated paper, the dry down showed a quite gap of different due to the fast penetration to the paper.

• 한국융합학회논문지
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• 제6권6호
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• pp.111-117
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• 2015

디지털콘텐츠 산업은 새로운 기기와 기술의 발전, 장르, 기술간 융합화 현상으로 성장이 예상되고 있다. 그러나, 초기 투자 비용이 많이 소요되고 불확실한 수익성 때문에 디지털콘텐츠 분야에 대한 금융지원제도는 활성화되지 못하고 있다. 본 논문은 기술가치평가를 이용하여 디지털콘텐츠 기업들의 금융 활성화 방안에 관한 연구이다. 이를 위하여 첫째, 디지털콘텐츠 기업들의 현황(자금조달 현황과 매출액 등)을 살펴본다. 둘째, 분석된 디지털콘텐츠 기업들의 현황을 바탕으로 금융활성화 방안을 논한다. 본 연구는 기술가치평가를 활용한 금융활성화 방안 도출에 도움을 줄수 있다.

• 품질경영학회지
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• 제40권3호
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• pp.372-380
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• 2012

Purpose: The purpose of this research is to develop the methods for evaluating the business value of a company's technical portfolios. In this study, technical portfolios of 10 major manufacturers and e-Biz industries are examined first from a business model perspective. Subsequently, we suggest future direction of R&D for the pharmaceutical industry by deducing the leading industries sharing similar traits with the pharmaceutical industry. Methods: In order to evaluate and analyze the patents of the major leading industries based on the constituents of a business model, the target patents were selected through the following procedure. Results: First, In this study, using the data obtained from the patent analysis, the differences in the technology portfolios of specific business entities based on the constituents of their business models. Second, deduced business rules of particular business entities through classification analysis and role-model of pharmaceutical industry Conclusion: If enterprise discovers technological change and characters of other enterprise or technology, enterprise could judge a direction of technology which will be developed in the near term and a plan which utilized existing technology to increase enterprise's profits.

• 한국국방경영분석학회지
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• 제32권1호
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• pp.73-89
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• 2006

이 논문에는 한국형 헬기 시제품(KHP) 개발을 위한 EVMS 적용절차를 제시하였다. 무기체계의 연구개발은 사업기간이 긴 사업으로서 불확실성과 위험에 기인한 비용상승의 확률이 높다. 따라서 일정과 기술적 성능을 만족하고 초과비용을 억제하는 것이 연구개발사업을 성공하기 위한 주요 관건이다. EVMS는 성과를 활용하여 비용, 일정 및 기술적 성능을 통제하는 사업관리시스템이다. 그러므로 한국형 헬기 시제품 개발사업의 비용 및 일정을 통해하고, 기술적 성능을 만족시키기 위하여 EVMS의 적용이 요구된다.

• Nuclear Engineering and Technology
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• 제55권9호
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• pp.3359-3366
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• 2023

In this study, a spiking cortical model (SCM) based n-g discrimination method is proposed. The SCM-based algorithm is compared with three other methods, namely: (i) the pulse-coupled neural network (PCNN), (ii) the charge comparison, and (iii) the zero-crossing. The objective evaluation criteria used for the comparison are the FoM-value and the time consumption of discrimination. Experimental results demonstrated that our proposed method outperforms the other methods significantly with the highest FoM-value. Specifically, the proposed method exhibits a 34.81% improvement compared with the PCNN, a 50.29% improvement compared with the charge comparison, and a 110.02% improvement compared with the zero-crossing. Additionally, the proposed method features the second-fastest discrimination time, where it is 75.67% faster than the PCNN, 70.65% faster than the charge comparison and 38.4% slower than the zero-crossing. Our study also discusses the role and change pattern of each parameter of the SCM to guide the selection process. It concludes that the SCM's outstanding ability to recognize the dynamic information in the pulse signal, improved accuracy when compared to the PCNN, and better computational complexity enables the SCM to exhibit excellent n-γ discrimination performance while consuming less time.

• Ocean Systems Engineering
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• 제12권3호
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• pp.335-358
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• 2022

Hydrodynamic field alteration around a cylindrical pier using a curved vane is numerically investigated. The curved vane with various angles ranged from 10 to 220 degree is placed at the upstream of the cylindrical pier. Laminar flow is adopted in order to perform the steady-state analysis. It is found that the flow separation leads to the formation of four bubbles depending on the value of the curved vane angle. Two bubbles are located in the region between the rear of the curved vane and the leading surface of the cylindrical pier, while the remaining two bubbles are located at the wake zone behind the cylindrical pier. Numerical analysis is performed to reveal the hydrodynamic field and influence of curved vane on the formation and evolution of the bubbles. It is found that the center and size of the bubble depend mainly on the value of the curved vane angle. It is observed that the flow velocity vector shows clearly the alteration in the flow velocity direction especially at the leading surface and rear surface of the curved vane owing to the occurrence of flow separation and flow dissipation along the circumference of the vane.

• Computers and Concrete
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• 제32권6호
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• pp.553-565
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• 2023

This work is the first to apply nonlocal theory and a variety of deformation plate theories to study the issue of forced vibration and buckling in organic nanoplates, where the effect of the drag parameter inside the structure has been taken into consideration. Whereas previous research on nanostructures has treated the nonlocal parameter as a fixed value, this study accounts for its effect, and finds that its value fluctuates with the thickness of each layer. This is also a new point that no works have mentioned for organic plates. On the foundation of the notion of potential movement, the equilibrium equation is derived, the buckling issue is handled using Navier's solution, and the forced oscillation problem is solved using the finite element approach. Additionally, a set of numerical examples exhibiting the forced vibration and buckling response of organic nanoplates are shown. These findings indicate that the nonlocal parameter and the drag parameter of the structure have a substantial effect on the mechanical responses of organic nanoplates.

• Structural Engineering and Mechanics
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• 제6권7호
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• pp.747-756
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• 1998

In this paper the influence of rotary inertia, shear and compressibility on the value of the critical force for the Beck's column is analyzed. The constitutive equation is of Engesser's type. As a result, the critical load parameter for which instability of flutter type occurs is calculated for several values of the column's parameters.

• 기술혁신학회지
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• 제3권2호
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• pp.1-13
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• 2000

This paper maps the overall features of technology valuation through a conceptional framework. The framework is composed of 4 dimensions such as basic, compositional, technical and behavioral dimension. At basic dimension, what is value and what is technology are discussed. The valuation of technology or the valuation of other assets are compared at the compositional dimension. The techniques of the valuation of technology and its difference with the valuation methods of other assets are examined at the technical dimension. The effectiveness, possibility and error of valuation are discussed at the behavioral dimension.

• 펄프종이기술
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• 제44권6호
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• pp.21-27
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• 2012

The effects of fines contents in OCC stock on the wet pressing process were evaluated in this study. The fines were collected from the beaten OCC stock by using 200 mesh. The dryness of handsheet samples after the couch and after the 1st wet press were greatly affected by the fine contents of the OCC stock. The higher contents of fines resulted in the lower value in dryness but the higher value of density followed by the higher strength properties. The addition of the retention aids and the drainage aids on the OCC stocks showed the wet pressing efficiency were greatly affected by the fine contents rather than the addition of polymer additives. The increase in the fine retention by the polymer additives offset the improvement in the wet pressing efficiency originated from the polymer additives.