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- 저자 : Seddigh, Mohammad Ali (검색결과 4 건)
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Cyber Security Approaches for Industrial Control Networks
Dillabaugh, Craig,Nandy, Biswajit,Seddigh, Nabil,Wong, Kevin,Lee, Byoung-Joon (BJ) Korea Institute of Information Security and Crypto 2016 情報保護學會誌 Vol.26 No.6
Critical infrastructure (CI) such as the electrical grid, transportation systems and water resource systems are controlled by Industrial Control and SCADA (Supervisory Control and Data Acquisition) networks. During the last few years, cyber attackers have increasingly targeted such CI systems. This is of great concern because successful attacks have wide ranging impact and can cause widespread destruction and loss of life. As a result, there is a critical requirement to develop enhanced algorithms and tools to detect cyber threats for SCADA networks. Such tools have key differences with the tools utilized to detect cyber threats in regular IT networks. This paper discusses key factors which differentiate network security for SCADA networks versus regular IT networks. The paper also presents various approaches used for SCADA security and some of the advancements in the area.
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Maryam Darabi,Samin Seddigh 한국식물학회 2017 Journal of Plant Biology Vol.60 No.1
Ribulose-1,5-bisphosphate carboxylase/oxygenase (RuBisCO; EC 4.1.1.39) is a key enzyme in plant photosynthesis that catalyzes the reaction in the photosynthetic assimilation of atmospheric carbon dioxide (CO2). In this study, bioinformatic characterization of RuBisCO enzyme was performed in protein sequences of its large subunits (rbcL) from 25 C3 plants of 14 different families. In protein-protein interactions analysis by STRING 10 tool, 7 and 168 relevant datasets were identified in Arabidopsis thaliana and other species, respectively. The structural and functional analyses were investigated by ProtParam, SOPMA, Predotar 1.03, SignalP 4.1, TargetP 1.1, and TMHMM 2.0 tools in ExPASy database. Tertiary structure was predicted by Phyre2 and TM-score servers then their qualities were verified by PROCHECK and SuperPose servers. In MEME and MAST analyses, 9 common conserved motifs obtained in all C3 plants. The protein sequences were aligned with ClustalW algorithm by MEGA 6.06 software and phylogenetic tree was constructed using the Neighbor-joining (NJ) method. According to the results, there is a high identity of RuBisCO in different species of C3 plants so that they should be derived from a common ancestor. The results provide background of bioinformatic studies for the function and evolution of RuBisCO in other plants.
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Cyber Security Approaches for Industrial Control Networks
C. Dillabaugh,B. Nandy,N. Seddigh,K. Wong,Byoung-Joon (BJ) Lee 한국정보보호학회 2016 情報保護學會誌 Vol.26 No.6
Critical infrastructure (CI) such as the electrical grid, transportation systems and water resource systems are controlled by Industrial Control and SCADA (Supervisory Control and Data Acquisition) networks. During the last few years, cyber attackers have increasingly targeted such CI systems. This is of great concern because successful attacks have wide ranging impact and can cause widespread destruction and loss of life. As a result, there is a critical requirement to develop enhanced algorithms and tools to detect cyber threats for SCADA networks. Such tools have key differences with the tools utilized to detect cyber threats in regular IT networks. This paper discusses key factors which differentiate network security for SCADA networks versus regular IT networks. The paper also presents various approaches used for SCADA security and some of the advancements in the area.
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Mostafavi, Azam Sadat,Memarian, Maryam,Seddigh, Mohammad Ali The Korean Academy of Prosthodonitics 2021 The Journal of Advanced Prosthodontics Vol.13 No.1
Purpose. Implant mechanical complications, including screw loosening, can influence dental implant success. It has been shown that torque values are affected by contamination occurred in implant-abutment (I/A) interface. This study aimed to examine the effects of blood, saliva, fluoride and chlorhexidine contamination on reverse torque values (RTVs) of abutment screws in oral conditions. Materials and Methods. 50 fixtures were mounted into the stainless-steel holders and divided into five groups (n = 10). Except control group (NC), fixture screw holes in other groups were contaminated with chlorhexidine (CG), saliva (SG), blood (BG), or fluoride (FG). Abutment screws were tightened with a digital torque meter. I/A assemblies were subjected to thermocycling and cyclic loading. The mean RTVs were recorded and data were analyzed with one-way ANOVA and Tukey test. Results. Except for specimens in SG (20.56 ± 1.33), other specimens in BG (21.11 ± 1.54), CG (22.89 ± 1.1) and FG (24.00 ± 1.12) displayed significantly higher RTVs compared to NC (19.00 ± 1.87). The highest RTVs were detected in CG and FG. Conclusion. The obtained data robustly suggest that RTVs were significantly affected by fluid contaminations. Specimens in FG and CG displayed the highest RTVs. Therefore, clinicians should have enough knowledge about probable contaminations in I/A interface in order to manage them during clinical procedure and to inform patients about using oral care products.
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