• 한국인터넷방송통신학회논문지
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• 제11권6호
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• pp.31-39
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• 2011

재난현장에서 신속한 애드혹 무선 백본망을 형성하기 위해서는 사전계획 없이 초동 대응요원들에 의하여 무선 애드혹 중계장치를 실시간으로 배치하는 기법이 필요하다. 그러나 이를 실현하기 위해서는 중계장치의 중복배치 최소화뿐만 아니라 통신권역 확장을 위한 중계장치의 최적 위치를 선정할 수 있어야 한다. 따라서 본 논문에서는 통신권역을 최적화하기 위한 새로운 중계장치 배치기법을 제안하고 모의실험을 통하여 알고리즘의 성능이 향상되었음을 보였다.

• 한국IT서비스학회지
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• 제10권3호
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• pp.213-236
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• 2011

Mobile devices are widely accepted as a convenient machine which provides computing capability as well we cell phone capability. Because of limited resources on mobile devices, complex applications could not be deployed on the devices. Service-based mobile applications (SMAs) can provide a solution to overcome the limitation by subscribing cloud services. Since SMAs have complex structures than standalone applications, it is challenging to develop high quality SMAs, to manage both services and mobile applications, and to implement automated billing for subscribed services. Therefore, there is a great demand for a platform for super mobile computing, which supports all key activities in managing life cycle of SMAs. In this paper, we present technical aspects of a platform which is under development; Super Mobile Autonomous Reliable plaTform (SMART). We believe that it provides a number of practical features which are essential in supporting life-cycle of SMAs; development, deployment, management, and operation.

• Journal of Electrical Engineering and Technology
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• 제12권3호
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• pp.1307-1313
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• 2017

Sensor networks are composed of provide low powered, inexpensive distributed devices which can be deployed over enormous physical spaces. Coordination between sensor devices is required to achieve a common communication. In low cost, low power and short-range wireless environment, sensor networks cope with significant resource constraints. Security is one of main issues in wireless sensor networks because of potential adversaries. Several security protocols and models have been implemented for communication on computing devices but deployment these models and protocols into the sensor networks is not easy because of the resource constraints mentioned. Memory intensive encryption algorithms as well as high volume of packet transmission cannot be applied to sensor devices due to its low computational speed and memory. Deployment of sensor networks without security mechanism makes sensor nodes vulnerable to potential attacks. Therefore, attackers compromise the network to accept malicious sensor nodes as legitimate nodes. This paper provides the different security models as a metric, which can then be used to make pertinent security decisions for securing wireless sensor network communication.

• International Journal of Fluid Machinery and Systems
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• 제1권1호
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• pp.33-37
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• 2008

EquiMar (Equitable Testing and Evaluation of Marine Energy Extraction Devices in terms of Performance, Cost and Environmental Impact) is one of the first round of energy projects under the European Commissions 7th Framework Programme (FP7). The three year EquiMar project aims to deliver a suite of protocols for the evaluation of both wave and tidal converters, harmonizing testing and evaluation procedures across the wide range of available devices, accelerating adoption through technology matching and improving the understanding of both environmental and economic impacts associated with the deployment of devices. The EquiMar protocols will cover site selection, initial design, scaling up of designs, the deployment of arrays and environmental impact assessment as well as economic issues. EquiMar will build on existing protocols, e.g. UK DTI Marine Renewables Development Fund (MRDF) protocols for wave and tidal energy, and engage with international standards setting activities, e.g. IEC TC114.

• International Journal of Computer Science & Network Security
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• 제24권4호
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• pp.141-146
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• 2024

A local area network (LAN) is a computer network within a small geographical area such as a home, school, computer laboratory, office building or group of buildings. A LAN is composed of interconnected workstations and personal computers which are each capable of accessing and sharing data and devices, such as printers, scanners and data storage devices, anywhere on the LAN. LANs are characterized by higher communication and data transfer rates and the lack of any need for leased communication lines. Communication between remote parties can be achieved through a process called Networking, involving the connection of computers, media and networking devices. When we talk about networks, we need to keep in mind three concepts, distributed processing, network criteria and network structure. The purpose of this Network is to design a Local Area Network (LAN) for a BAEC (Bangladesh Atomic Energy Commission) Head Quarter and implement security measures to protect network resources and system services. To do so, we will deal with the physical and logical design of a LAN. The goal of this Network is to examine of the Local Area Network set up for a BAEC HQ and build a secure LAN system.

• ETRI Journal
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• 제42권6호
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• pp.965-975
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• 2020

This paper proposes a new framework for the development and deployment of honeypots for evolving malware threats. As new technological concepts appear and evolve, attack surfaces are exploited. Internet of things significantly increases the attack surface available to malware developers. Previously independent devices are becoming accessible through new hardware and software attack vectors, and the existing taxonomies governing the development and deployment of honeypots are inadequate for evolving malicious programs and their variants. Malware-propagation and compromise methods are highly automated and repetitious. These automated and repetitive characteristics can be exploited by using embedded reinforcement learning within a honeypot. A honeypot for automated and repetitive malware (HARM) can be adaptive so that the best responses may be learnt during its interaction with attack sequences. HARM deployments can be agile through periodic policy evaluation to optimize redeployment. The necessary enhancements for adaptive, agile honeypots require a new development and deployment framework.

• 항공우주시스템공학회지
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• 제12권6호
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• pp.58-65
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• 2018

여러 패널들로 파라볼라 반사판 형상을 가지는, 전개형 복합재료 안테나의 동적 특성을 수치적 그리고 실험적으로 살펴보고자 한다. 전개 장치들은 여러 패널들이 작은 공간에 효과적으로 수납될 수 있도록 설계하였다. 반사판 패널의 개수, 패널들의 폴딩(folding)/트위스팅(twisting) 각도, 그리고 전개 작동기 등의 특성을 고려하여 전개시 필요한 설계변수를 결정하였고, 반사판 패널은 CFRP(carbon fiber reinforced plastics)으로 제작하였다. 무중력 전개장치를 제작하여 반사판 안테나의 전개시험을 수행하였고, 동적 전개특성을 관찰하였다.

• 한국ITS학회 논문지
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• 제11권2호
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• pp.67-76
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• 2012

본 연구에서는 본 학회지(제9권, 제5호 (2010년 10월))에서 발표한 교통약자보호시스템이 설치되어 있는 지역에 대한 어린이 지킴이 서비스 만족도 평가기준을 단순한 보호자 만족도 평가에서 벗어나 객관적인 구축평가 기준으로 정립하였다. 또한, 인식장치를 신규배치하기 위한 지역에 대해서는 사전 예측평가를 실시하여 인식장치 적정배치에 판단근거로 삼아 효율적 예산집행이 가능하도록 하였다. 시스템 구축평가에서는 가장 기본이 되는 최대 안심 거리는 72.2m로 나타났다. 이를 토대로 위험도개념을 도입하여 심리적위험도와 사고위험도를 종합한 위험도 순위에 따라 인식장치를 인식장치 배기거리에 맞게 배치하는 방식으로 향후 사업이 진행될 수 있도록 평가기준을 제시하였다. 평가기준에 의거 사례지역에 대한 종합위험도 평가결과 시범사업 후 종합위험도가 35.2% 감소한 것으로 평가되었다. 또한, 예산 규모 내에서 인식장치를 배치기준에 의해 설치할 경우 전체적으로 위험도가 33.1% 낮아져 예산규모는 당초 시범사업보다 21.9% 적게 투입하고도 종합위험도는 당초 시범사업의 94% 수준까지 낮출 수 있어 본 연구에서 정립한 위험도에 따른 인식장치 배치방법이 종합위험도 감소와 예산절감에 향후 효과적으로 적용될 수 있음을 알 수 있었다.

• International Journal of Aeronautical and Space Sciences
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• 제13권1호
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• pp.117-125
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• 2012

This paper presented the design of SRPS, ground function test, and the deployment test on a high speed taxi of KC-100 airplane. KAI has developed a spin recovery system in collaboration with Airborne Systems for KC-100 general aviation airplane. Spin mode analysis, rotary balance and forced oscillation tests were performed to obtain the rotational, dynamic derivatives in the preliminary design phase. Prior to the detailed design process of SRPS, approximations for initial estimation of design parameters- fineness ratio, parachute porosity, parachute canopy filling time, and deployment method- were considered. They were done based on the analytical disciplines such as aerodynamics, structures, and stability & control. SRPS consists of parachute, tractor rocket assembly for deployment, attach release mechanism (ARM) and cockpit control system. Before the installation of SRPS in KC-100 airplane, all the control functions of this system were demonstrated by using SBTB(System Breakout Test Box) in the laboratory. SBTB was used to confirm if it can detect faults, and simulate the firing of pyrotechnic devices that control the deployment and jettison of SRPS. Once confirmed normal operation of SRPS, deployment and jettison of parachute on the high speed taxiing were performed.

• 한국지하수토양환경학회지:지하수토양환경
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• 제29권4호
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• pp.12-20
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• 2024

Diffusive gradients in thin films (DGT) are passive sampling devices used to determine the time-weighted average concentrations (TWAC) of contaminants. To ensure accurate performance in groundwater, it is crucial to identify environmental characteristics and maintain optimal operational conditions. This study examined the deployment time required to reach effective capacity, the thickness of the diffusive boundary layer (DBL) under stagnant water conditions, and biofilm formation on the DGT surface using groundwater samples. When using DGT with Chelex gel (A=3.14 cm²), the effective capacity was 0.7 ㎍ for Cd and 250 ㎍ for Zn, with a deployment time of 24 h. Lower Cd accumulation was due to the competition effect of coexisting ions. The DBL thickness under stagnant conditions was 0.074 cm, 93% of the diffusion gel's thickness (0.08 cm). Neglecting DBL thickness in TWAC calculations led to a 79% decrease in the determined concentration. No biofouling was observed during the 28-d DGT deployment in groundwater. In conclusion, it is essential to consider the appropriate deployment time, DBL thickness, and biofilm formation to ensure accurate DGT performance in determining contaminant levels in groundwater.