• 한국식품과학회지
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• 제19권2호
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• pp.129-133
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• 1987

마이크로컴퓨터를 식품가공 공정및 연구에서 자료수집및 제어에 응용하기 위하여 Apple ll 컴퓨터에 접속가능한 접속장치(接續裝置)를 설계 제작하였다. 또한 식품의 여러 공정에 주요한 변수가 되는 온도 및 무게값을 전기적 신호로 감지하는 센서와 A/D변환기(變換器)의 적정 입력전압범위 전환을 위한 증폭회로를 구성하였다. 이들을 연결시켜 필요한 BASIC어(語) 프로그램을 작성하여 식품건조 장치의 온도및 무게값의 측정장치로 활용 가능함을 보였다. 컴퓨터를 응용함으로써 공정자료의 정확성과 신뢰성을 향상시키고 여러가지 공정변수를 다량 수집할 수 있게되고 수집된 많은 자료를 용이하게 저장, 분석할 수 있었다. 본 실험장치에 여러가지 목적에 따라 필요한 측정 센서를 개발하여 부착(附着)함으로 비단 온도와 무게 측정뿐 아니라 제반(諸般)식품(食品)제조 공정과 실험의 자동화에 활용할 수 있는 기초적인 자료를 얻었다.

• 한국기계가공학회지
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• 제18권6호
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• pp.1-8
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• 2019

Modern weapon systems are multifunctional, with capabilities for executing complex missions. However, they are required to be highly reliable, which increases their total cost of ownership. Because it is necessary to produce the best results within a limited budget, there is an increasing interest in development, acquisition, and maintenance costs. Consequently, there is a need for tools that calculate the lifecycle costs of weapons systems development to facilitate decision making. In this study, we propose a cost calculation function based on the Markov process simulator-a reliability, availability, and maintainability analysis tool developed by applying the Markov-Monte Carlo method-as an alternative to these requirements to facilitate decision-making in systems development.

• 시스템엔지니어링학술지
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• 제8권1호
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• pp.51-62
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• 2012

The System Engineering(SE) and the Earned Value Management System(EVMS), as parts of the scientific project management methodology, have been applied to Surion Helicopter R&D Program. The concept and application process of SE methodology, requirements management and applications output by DOORS program are described in this study. The concept and application process of EVMS, analysis results of schedule/cost variance for Surion RF equipment are also discussed in this study. Though the Surion R&D program is still on-going, it is found that the measures of effectiveness of SE and EVMS applications are verified.

• 디지털산업정보학회논문지
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• 제5권2호
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• pp.123-131
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• 2009

Process Control Systems (PCSs) or Supervisory Control and Data Acquisition (SCADA) systems have recently been added to the already wide collection of wireless sensor networks applications. The PCS/SCADA environment is somewhat more amenable to the use of heavy cryptographic mechanisms such as public key cryptography than other sensor application environments. The sensor nodes in the environment, however, are still open to devastating attacks such as node capture, which makes designing a secure key management challenging. Recently, Nilsson et al. proposed a key management scheme for PCS/SCADA, which was claimed to provide forward and backward secrecies. In this paper, we define four different types of adversaries or attackers in wireless sensor network environments in order to facilitate the evaluation of protocol strength. We then analyze Nilsson et al. 's protocol and show that it does not provide forward and backward secrecies against any type of adversary model.

• 한국IT서비스학회:학술대회논문집
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• 한국IT서비스학회 2007년도 추계학술대회
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• pp.485-492
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• 2007

정보화 사업에서 발생할 수 있는 위험(Risk)은 다양하다. 정보화 사업 관련 위험 요인 중 가장 대표적이고 보편적인 것은 발주 및 제안단계에서 발주자가 가진 요구사항의 불명확을 꼽을 수 있는데, 이로 인해 정보화 사업 수행 도중 요구범위 증가와 변경, 그리고 사업원가 구조의 악성화가 발생하게 됨은 자명하다. 그러나 안타까운 현실은 그 동안 우리나라 정보화 사업의 관행이 요구사항 불명확이라는 잠재적 위험 아래에서도 발주자와 사업자 간의 계약이 보호장치가 미흡한 확정가(firm fixed price) 방식으로 수립되어 왔다는 것이다. 확정가로 계약이 수립될 경우 사업자는 발주자의 요구사항 불명확으로 인해 파생된 원가 위험까지 불합리하게 책임져야 하는 고리에 묶이게 된다. 이러한 문제를 본질적으로 해결하는 한가지 방법은 발주자와 사업자간의 정보화 사업 획득 절차를 혁신하는 것인데, 본 논문은 이를 위해 가칭, 한국형 정보화 산업 활성화 획득 절차(KIPAP: Korea If Proliferation Acquisition Process)의 기본 개념을 고안하여 소개한다. 이 획득 절차는 정보화 사업이 내재하고 있는 요구사항의 불확실성을 계량화, 가시화하여, 그 정도에 따라 차등화된 계약방식의 선정방법 을 제시한다.

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2010년도 춘계 학술논문 발표대회 1부
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• pp.135-138
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• 2010

In the construction industry, construction management system using information technology has been applied diversely to increase productivity. Although IT device such as PDA, RFID, Barcode, wireless network and web camera has been introduced in construction site, the usage of these device is restricted, because these cause engineer to do additional work. The suggested process using Digital Pen in this study, which can lessen engineer's additional work, get defect data promptly. Also accumulated data is utilized effectively for analyzing construction site. The purpose of this study is to introduce Digital Pen System as a means of construction data acquisition for improving productivity.

• Journal of information and communication convergence engineering
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• 제7권4호
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• pp.521-524
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• 2009

Park proposed a forward & backward Secure key management scheme in wireless sensor networks for Process Control Systems (PCSs) or Supervisory Control and Data Acquisition (SCADA) systems [7]. The scheme, however, is still vulnerable to an attack called "sandwich attack": two nodes captured at times $t_1$ and $t_2$, respectively, surrenders all the group keys used between times $t_1$ and $t_2$. In this paper, we propose a fix to the scheme, which can limit the vulnerable time duration to an arbitrarily chosen time span while keeping the forward and backward secrecy of the scheme untouched.

• Journal of information and communication convergence engineering
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• 제7권2호
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• pp.98-106
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• 2009

Process Control Systems (PCSs) or Supervisory Control and Data Acquisition (SCADA) systems have recently been added to the already wide collection of wireless sensor networks applications. The PCS/SCADA environment is somewhat more amenable to the use of heavy cryptographic mechanisms such as public key cryptography than other sensor application environments. The sensor nodes in the environment, however, are still open to devastating attacks such as node capture, which makes designing a secure key management challenging. In this paper, a key management scheme is proposed to defeat node capture attack by offering both forward and backward secrecies. Our scheme overcomes the pitfalls which Nilsson et al.'s scheme suffers from, and is not more expensive than their scheme.

• 한국기계가공학회지
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• 제11권4호
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• pp.46-50
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• 2012

Stainless steel and titanium used for orthopedic prosthetic metal, magnetic resonance imaging was measured quantitatively the extent of distortion. Based on reading tests at varying metal magnetic resonance imaging (MRI) were investigated. To two image acquisition conditions for having three metal bodies mutually quantitative it compared analyzed the image of cross direction and the image of lengthwise. As for the distortion of the magnetic resonance image, as for the distortion of image it became small in the order of Clip, Strainless and Titanium. In addition, with T1WI and T2WI which are image acquisition condition T2WI the distortion of image became small. As for the distortion of the image by the metal, you could see the distortion of image in elliptical shape, the metal a bigger image distortion appeared in many parts. If clinical doctor has the condition of the same operation, use the Titanium material, it can, raising the diagnostic value of magnetic resonance image inspection after the operating from Stainless.

• 로봇학회논문지
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• 제4권3호
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• pp.233-242
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• 2009

This paper briefly reviews the path planning methods that are applicable to the autonomous mobile robots for the military. Two distinct path search algorithms, $A^*$ and $D^*$ that are most popular and flexible in public applications, among those reviewed are coded and analyzed in terms of combat environment assessment factors called METT+TC for the area of operations. The results imply that it is important to consider the characteristics of defense acquisition process and the specific requirements of defense operation so that the successful technology development of the Robot products is directly linked to the defense procurement of Robot products.