• Journal of the Korea Institute of Information Security & Cryptology
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• v.10 no.2
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• pp.67-78
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• 2000

인터넷의 급속한 발전으로 학교나 기업체 등의 네트워크가 인터넷을 통해 공유되면서 누구에게나 접속이 허용되어 많은 보안상의 문제가 발생하게 되었다 이러한 문제점을 해결하기 위해서 기존의 호스트 기반 보안 정책에서 네트워크 기반의 보안 시스템으로 침입차단 시스템을 설치하지만 침입차단 시스템은 보안을 위하여 최소 권한만을 인정하므로 사용자에게 투명한 서비스를 제공해주지 못한다. 따라서 본 논문에서는 침입차단 시스템에 프록시를 두어서 서비스의 투명성을 제공하고 강력한 보안 기능을 갖는 FTP 프록시 보안모델(FTP-PSM : FTP Proxy Security Model)을 설계 및 구현을 하고 원격 보안 탐색 도구인 SAINT를 이용하여 FTP-PSM의 안전에 대한취약성 여부를 분석하고 보안기능과 성능과의 관계를 응답시간 측정을 통해 측정함으로써 평가하였다 FTP-PSM은 강한 인증 기능을 위하여 일회용패스워드기능을 제공하고 정당한 사용자에게 서비스 제공여부를 결정하기 위해 강제적 접근제어와 임의적 접근제어 기능 그리고 FTP 명령어 사용 권한을 사용자 그룹별로 인증하는 기능을 제공하여 FTP 보안의 문제점을 해결한다.

• Proceedings of the Korean Institute of Landscape Architecture Conference
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• 2019.03a
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• pp.39-41
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• 2019

• Journal of the Korea Academia-Industrial cooperation Society
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• v.15 no.7
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• pp.4536-4544
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• 2014

This paper proposes a development tool to efficiently develop node software for various operating system platforms in a sensor network. The proposed tool consisted of several modules, such as writing graphical model diagram, PIM and PSM design, code generation, and deployment file generation. Through the proposed tool, the users can graphically draw a sensor network model and design the PIM and PSM of the node software by setting the values of the predefined attributes. The source code of the node software is generated automatically from the PSM using the code templates of the target platform. The deployment files for installing node software on each node are generated automatically. The proposed tool helps the users to develop node software easily for a range of target platforms, even though they do not have details of the low-level information for a sensor network.

• Journal of the Korea Institute of Building Construction
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• v.9 no.5
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• pp.155-161
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• 2009

This paper is the result of an investigation of a PORTABLE SLIP METER(ONO PPSM) by means of an experiment to determine its validity as a slip meter. ONO PPSM is a portable slip meter that was designed to address the weak points of PULL SLIP METER(O-Y PSM), which can be used to obtain an accurate measurement of slip resistance, but is very heavy and difficult to operate. To determine the stability of the measurement result of ONO PPSM, we measured the slip resistance against 4 different kind of floor materials. Our findings showed that the coefficient of variability of CSR' is less than 0.05. Furthermore, we verified the relationship between CSR' and CSR. More specifically, by performing the slip test against 7 different kinds of inorganic matter floor materials, we increased the usability of ONO PPSM as a slip meter by suggesting a method of sharing the evaluation index of slip of CSR' and C.S.R.

• Journal of KIISE:Information Networking
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• v.28 no.3
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• pp.369-376
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• 2001

The firewall systems can be installed between the intemal network and the extemal network. The firewall systems has the least privilege, so its does not provide transparency to user. This problem of transparency can be solved by using the proxy. In this thesis, I have designed and verified the FTP-PSM(FTP-Proxy Security Mode]) which provides transparency for the firewall systems and has a strong security function. FTP-PSM doesn't finish its work after implementing a command. Instead, its does several security functions such as user authentication, MAC(MandatOlY Access Controll, DAC(Discretionary Access Controll and authentication of user group. Those data must not be lost under any circumstances in order to implement the above security functions. So, the security against such problems as falling into deadlock or unlimited loop during the implementation must be verified. Therefore, FTP-PSM suggested in thesis was verified its security through PHPlace Invariant) based on CPNlCo]oured Petri Net).

• Microbiology and Biotechnology Letters
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• v.37 no.3
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• pp.238-242
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• 2009

Pediococci selective medium (PSM) supplemented with ampicillin (A) reported as valid for the detection and enumeration of pediococci included in foods and animal feed was evaluated for the selective detection of the genus Pediococcus in kimchi. PSM is based on the complex basal medium MRS supplemented with cysteine hydrochloride, vancomycin, novobiocin, and nystatin. In the medium evaluation with known species, the growth inhibition of leuconostocs, Pediococcus pentosaceus, Lactobacillus casei, Lactobacillus curvatus, Oenococcus oeni, and Streptococcus thermophilus was not confirmed. In the application of kimchi samples on the selective medium, leuconostocs, P. pentosaceus, Weissella koreensis, Lb. curvatus, Lactobacillus brevis, and Lactobacillus sakei were detected. PSM+A was proved to be not applicable for the detection of pediococci in kimchi.

• Journal of the Semiconductor & Display Technology
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• v.14 no.3
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• pp.1-5
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• 2015

In photolithography process, resolution enhancement techniques such as optical proximity correction (OPC) and phase shift mask (PSM) have been applied to improve resolution. Especially, sub-resolution assist feature (SRAF) is one of the most important OPC to enhance image quality including depth of focus (DOF). However, imaging performance of the mask could be varied with the diffraction order amplitude changed by inserting SRAF. Therefore, in this study, we investigated the imaging properties and process margin of attenuated PSM with SRAF. Reflectivities of attenuated PSMs at 13.5 nm were 3, 6, 9% and simulation was performed by $PROLITH^{TM}$. As a result, aerial image properties and DOF as well as diffraction efficiency were improved by increasing the reflectivity of attenuated PSM. Additionally, printed critical dimension variations depending on SRAF width and space error were also reduced for attenuated PSM with high reflectivity. However, SRAF could be printed when reflectivity of attenuated PSM is high enough. In conclusion, optimization of reflectivity of attenuated PSM and SRAF to prevent side-lobe from being printed is needed to be considered.

• Journal of the Korean Society of Safety
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• v.23 no.6
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• pp.57-61
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• 2008

In order to maintain the continual safety management in a company, it needs to evaluate and monitor its implementation of safety management. Because the number of major-accidents is not an effective method of indicating company's safety performance, various efforts to develop more reasonable indicators have been made in world wide. After Korean government has legally required the PSM report, PSM compliance audit has been developed and made by the authorities concerned since 2005. However, this audit consists of complicate procedures difficult to utilize as companies' own audit program and corresponds to only a conformity check that confirms whether the PSM be operated and maintained properly. So a new index by which to measure easily the level of safety performance and self-monitor the implementation of safety management is needed. We have studied a new method that may quantitatively evaluate the performance of safety management by investigating application cases in foreign countries and doing the domestic survey of lots of companies subject to PSM regulation in Korea. This study proposes three of safety performance indices(SPI) together with the several prerequisite preconditions and the timing for application of each index. Although the first draft of SPI needs further legal support, it might help to evaluate every company's safety level. The second draft of SPI is a voluntarily evaluating method based on web-site online program. The last draft of SPI consists of a series of simple questions about 12 elements of PSM. Also each of 3 indices has differences in evaluation methodology and application area and, therefore, they may be used concurrently.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.17 no.12
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• pp.2826-2834
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• 2013

In mobile ad hoc networks (MANET), power-saving technology of mobile nodes is divided into transmit power control (TPC), power-saving mode (PSM), and routing. TPC and PSM are operated in physical layer but the routing is managed in network layer, so the design of a joint algorithm is needed to provide better performance. Therefore, in this paper, we propose a joint power-saving and routing algorithm for maximizing the network lifetime while satisfying the end-to-end data rate in ad hoc networks. The proposed algorithm first applies the TPC or PSM to reduce the power consumption of mobile nodes and then performs the routing by considering the decided node lifetime in order to maximize the path lifetime. Simulation results show that the proposed algorithm maximize the lifetime while satisfying the required rate according to the number of mobile nodes and the level of interference.

• The Journal of Korea Institute of Information, Electronics, and Communication Technology
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• v.12 no.3
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• pp.201-210
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• 2019

This paper proposes the AMCS(Agricultural Machine Control System that distinguishes farms using satellite photos or drone photos of farms and controls the self-driving and operation of farm drones and tractors. The AMCS consists of the LSM(Local Server Module) which separates farm boundaries from sensor data and video image of drones and tractors, reads remote control commands from the main server, and then delivers remote control commands within the management area through the link with drones and tractor sprinklers and the PSM that sets a path for drones and tractors to move from the farm to the farm and to handle work at low cost and high efficiency inside the farm. As a result of AMCS performance analysis proposed in this paper, the PSM showed a performance improvement of about 100% over Dijkstra algorithm when setting the path from external starting point to the farm and a higher working efficiency about 13% than the existing path when setting the path inside the farm. Therefore, the PSM can control tractors and drones more efficiently than conventional methods.