• 품질경영학회지
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• 제26권4호
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• pp.202-218
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• 1998

It is well-known that leading firms are more innovative than others, with far more sales from new products. This paper suggests that what kinds of creatively techniques can be a, pp.ied to new product development process for the purpose of commercial success. Both divergent and convergent techniques are considered at each stage of new product development process. Some typical creativity techniques such as boundary examination, bug list, manipulative verbs, morphological analysis, SCAMPER, and TRIZ are explained with case examples.

• 한국소성가공학회:학술대회논문집
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• 한국소성가공학회 2004년도 추계학술대회논문집
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• pp.267-270
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• 2004

In Micro injection process, it is needed to the technique of making micro die, Rapid Thermal Pressing (RTP) and other techniques. Those techniques are independent. But the mutual connected system of techniques is needed. The target of this paper is the design of micro mold and the development of the entire micro injection techniques for functional polymer.

• 융합보안논문지
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• 제19권5호
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• pp.55-61
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• 2019

본 논문은 갈수록 치밀해지고 정교해지는 위협으로부터 SCADA 망을 지키기 위한 보안 방안에 대해 연구하였다. 현재 SCADA 시스템 보안은 일반 IT 보안 시스템과 거의 유사한 방법이 사용되고 있다. 공통적으로 필요한 보안 기법들도 있겠지만, 일반 IT 시스템과는 다른 SCADA 시스템만을 위한 보안 기법이 필요한 실정이다. 따라서 본 논문은 현재 SCADA 시스템에 사용되는 보안 기법에 대해 알아보고, 현재 보안 기법을 사용하였을 시 생기는 문제점을 SCADA 시스템의 공격에 따른 피해 사례들을 통해 알아볼 예정이다. 마지막으로 현재 SCADA 시스템에 필요한 가용성과 무결성을 보장하기 위한 새로운 대응 방안으로 Blockchain 과 SCADA 시스템의 연계를 제안하였다.

• Geomechanics and Engineering
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• 제1권1호
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• pp.53-74
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• 2009

In recent years, several computer-aided pattern recognition and data mining techniques have been developed for modeling of soil behavior. The main idea behind a pattern recognition system is that it learns adaptively from experience and is able to provide predictions for new cases. Artificial neural networks are the most widely used pattern recognition methods that have been utilized to model soil behavior. Recently, the authors have pioneered the application of genetic programming (GP) and evolutionary polynomial regression (EPR) techniques for modeling of soils and a number of other geotechnical applications. The paper reviews applications of pattern recognition and data mining systems in geotechnical engineering with particular reference to constitutive modeling of soils. It covers applications of artificial neural network, genetic programming and evolutionary programming approaches for soil modeling. It is suggested that these systems could be developed as efficient tools for modeling of soils and analysis of geotechnical engineering problems, especially for cases where the behavior is too complex and conventional models are unable to effectively describe various aspects of the behavior. It is also recognized that these techniques are complementary to conventional soil models rather than a substitute to them.

• 한국항행학회논문지
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• 제14권6호
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• pp.838-844
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• 2010

본 논문은 현재 전 세계적으로 사이버전의 심각성을 자극하고 있는 악성코드인 Stuxnet에 대해 소개하고, Stuxnet이 전파되는 방법 및 감염 증상에 대해 분석하며 그 구조에 따른 치료 방안을 제안한다. Stuxnet과 같은 악성코드는 시스템 내에서 은닉되어 전파되기 때문에 이를 탐지하거나 치료하기 위해서는 이들이 사용하는 파일 은닉 기법을 분석해야 한다. 본 논문의 분석 결과, Stuxnet은 자신을 구성하는 파일들의 은닉을 위하여 유저레벨에서 라이브러리 후킹을 활용한 기법과 커널레벨에서 파일시스템 드라이버의 필터 드라이버를 활용한 기법을 사용하고 있다. 따라서 본 논문에서는 Stuxnet이 활용하는 파일 은닉 기법에 대한 분석 결과를 소개하고, 이를 무력화하기 위한 방안을 제시하며, 실험을 통해 실제 무력화가 가능함을 확인하였다.

• 유기물자원화
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• 제21권3호
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• pp.53-63
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• 2013

중금속에 의한 토양오염문제는 주로 폐 금속광산의 주변 농경지등에서 발생되어져 왔으며 이를 해결하기위한 비용은 수질이나 대기오염에 비해서 훨씬 크며 시간도 많이 소요되어진다고 알려져 있다. 지금까지 중금속으로 오염된 토양을 복원시키기 위한 경제적이고 실용적인 많은 기술들이 개발되어지고 제안되어져 왔다. 그래서 본 연구에서는 최근까지 국내/외에서 개발되어지거나 실용화되어지고 있는 다양한 기술들의 특성 및 장 단점 등에 대하여 고찰하고자 한다.

• Nuclear Engineering and Technology
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• 제38권3호
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• pp.225-230
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• 2006

With the advent of inexpensive computing power over the past two decades, applications of Monte Carlo radiation transport techniques have proliferated dramatically. At Los Alamos, the Monte Carlo codes MCNP5 and MCNPX are used routinely on personal computer platforms for radiation shielding analysis and dosimetry calculations. These codes feature a rich palette of variance reduction (VR) techniques. The motivation of VR is to exchange user efficiency for computational efficiency. It has been said that a few hours of user time often reduces computational time by several orders of magnitude. Unfortunately, user time can stretch into the many hours as most VR techniques require significant user experience and intervention for proper optimization. It is the purpose of this paper to outline VR strategies, tested in practice, optimized for several common radiation shielding tasks, with the hope of reducing user setup time for similar problems. A strategy is defined in this context to mean a collection of MCNP radiation transport physics options and VR techniques that work synergistically to optimize a particular shielding task. Examples are offered in the areas of source definition, skyshine, streaming, and transmission.

• International journal of advanced smart convergence
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• 제1권2호
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• pp.26-29
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• 2012

Recently, to efficiently support the real-time requirements of RTLS( Real Time Location System) services, interest in the main memory DBMS is rising. In the main memory DBMS, because all data can be lost when the system failure happens, the recovery method is very important for the stability of the database. Especially, disk I/O in executing the log and the checkpoint becomes the bottleneck of letting down the total system performance. Therefore, it is urgently necessary to research about the recovery method to reduce disk I/O in the main memory DBMS. Therefore, In this paper, we analyzed existing log techniques and check point techniques and existing main memory DBMSs' recovery techniques for recovery techniques research for main memory DBMS.

• BMB Reports
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• 제57권3호
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• pp.135-142
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• 2024

DNA methylation is one of the most extensively studied epigenetic regulatory mechanisms, known to play crucial roles in various organisms. It has been implicated in the regulation of gene expression and chromatin changes, ranging from global alterations during cell state transitions to locus-specific modifications. 5-hydroxymethylcytosine (5hmC) is produced by a major oxidation, from 5-methylcytosine (5mC), catalyzed by the ten-eleven translocation (TET) enzymes, and is gradually being recognized for its significant role in genome regulation. With the development of state-of-the-art experimental techniques, it has become possible to detect and distinguish 5mC and 5hmC at base resolution. Various techniques have evolved, encompassing chemical and enzymatic approaches, as well as third-generation sequencing techniques. These advancements have paved the way for a thorough exploration of the role of 5hmC across a diverse array of cell types, from embryonic stem cells (ESCs) to various differentiated cells. This review aims to comprehensively report on recent techniques and discuss the emerging roles of 5hmC.

• Tribology and Lubricants
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• 제20권1호
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• pp.21-26
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• 2004

The average frictional coefficient was used generally to analyze the working process of the lubricated machine parts. But it is difficult of taking the correct frictional coefficient because the average frictional coefficient of it is progressed always unstably with a large amplitude on working condition. If the correct analysis of frictional coefficient on working condition for the lubricated machine parts can be possible, it can be effect on condition diagnosis of lubricated machine system. This study was carried out to get the optimum working condition of the hydraulic actuator parts using statistical techniques. From this result, it has the lowest friction coefficient in case of applied load of 3 kg and sliding speed of 120 mm/sec.