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Beyond Defense: Proactive Approaches to Disaster Recovery and Threat Intelligence in Modern Enterprises

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Journal of Information Security 2024年第2期15卷 106-133页

作者： meysam tahmasebi School of Technology and Innovation Marymount University Arlington USA

As cyber threats keep changing and business environments adapt, a comprehensive approach to disaster recovery involves more than just defensive measures. This research delves deep into the strategies required to respond to threats and anticipate and mitigate them proactively. Beginning with understanding the critical need for a layered defense and the intricacies of the attacker’s journey, the research offers insights into specialized defense techniques, emphasizing the importance of timely and strategic responses during incidents. Risk management is brought to the forefront, underscoring businesses’ need to adopt mature risk assessment practices and understand the potential risk impact areas. Additionally, the value of threat intelligence is explored, shedding light on the importance of active engagement within sharing communities and the vigilant observation of adversary motivations. “Beyond Defense: Proactive Approaches to Disaster Recovery and Threat Intelligence in Modern Enterprises” is a comprehensive guide for organizations aiming to fortify their cybersecurity posture, marrying best practices in proactive and reactive measures in the ever-challenging digital realm.

关键词： Advanced Persistent Threats (APT) Attack Phases Attack Surface Defense-in-Depth Disaster Recovery (DR) Incident Response Plan (IRP) Intrusion Detection Systems (IDS) Intrusion Prevention System (IPS) Key Risk Indicator (KRI) Layered Defense Lockheed Martin Kill Chain Proactive Defense Redundancy Risk Management Threat Intelligence

Distributed Hybrid Model Predictive Secondary Control of DC Microgrids with Random Communication Disorders

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Journal of Modern Power Systems and Clean Energy 2024年第3期12卷 925-935页

作者： meysam Yaribeygi Zeinab Karami Qobad Shafiee Hassan Bevrani the Department of Electrical Engineering K.N.Toosi University of TechnologyTehranIranand he is now with the Sportradar CompanyTrondheimNorway the Department of Engineering Cybernetics(ITK) Norwegian University of Science and Technology(NTNU)TrondheimNorway the Smart/Micro Grids Research Center Department of Electrical EngineeringUniversity of KurdistanSanandajIran

A reliable and robust communication network is essential to exchange information between distributed generators(DGs)and accurately calculate their control actions in microgrids(MGs).However,the integration of the communication network and MGs poses challenges related to the flexibility,availability,and reliability of the ***,random communication disorders such as time delays and packet loss can negatively impact the system ***,it is essential to design a suitable secondary controller(SC)with a fast dynamic response to restore voltage and appropriate powersharing,while ensuring that the effects of random communication disorders are *** this regard,an optimal distributed hybrid model predictive secondary control method is presented in this *** simulations are carried out in a mixed simulation environment based on MATLAB and OMNET++,by considering IEEE 802.11(Wi Fi)using the recently developed Internet networking(INET)*** the implemented application layer,the recovery Unit is responsible for reducing the impact of random communication *** effectiveness and performance of the proposed method in comparison with a conventional model predictive control are verified by simulation results.

关键词： Microgrid model predictive control random communication disorder secondary control

环氧树脂涂层中添加含铝复合粉增强碳钢基材的防腐性

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Journal of Central South University 2024年第3期31卷 723-736页

作者： meysam TOOZANDEHJANI Pooria MOOZARM NIA Ebrahim ABOUZARI LOTF Farhad OSTOVAN Mahnaz SHAMSHIRSAZ New Technologies Research Center Amirkabir University of TechnologyTehran Polytechnic424 Hafez Ave.P.B.15875-4413TehranIran Section for Surface Physics and Catalysis Department of PhysicsTechnicFysikvejBygning 311Kongens LyngbyDK-2800Denmark Institute of Nanotechnology and Institute of Quantum Materials and Technology Karlsruhe Institute of TechnologyP.O.Box 364076021 KarlsruheGermany Department of Materials Science and Engineering Bandar Abbas BranchIslamic Azad UniversityBandar AbbasIran

采用电化学阻抗谱(EIS)和电位极化(Tafel)试验,研究了在环氧树脂涂层中添加含铝粉末以增强碳钢基材的防腐性,含铝粉末包括纯铝、Al/CNT、Al/Al_(2)O_(3)、Al/CNT/Al_(2)O_(3)。用球磨法合成含2 wt.%碳纳米管、2 wt.%氧化铝纳米颗粒的复... 详细信息

采用电化学阻抗谱(EIS)和电位极化(Tafel)试验,研究了在环氧树脂涂层中添加含铝粉末以增强碳钢基材的防腐性,含铝粉末包括纯铝、Al/CNT、Al/Al_(2)O_(3)、Al/CNT/Al_(2)O_(3)。用球磨法合成含2 wt.%碳纳米管、2 wt.%氧化铝纳米颗粒的复合粉末,然后以1 wt.%的浓度加入到环氧树脂涂层中。结果表明,由于环氧树脂复合涂层的防护性能增强,从而提高了其耐腐蚀性。研究还发现,Al/CNT/Al_(2)O_(3)复合添加剂的保护性能比其他添加剂更显著,因为其颗粒尺寸的减小和具有某些形状的颗粒,进一步减少了腐蚀环境通过涂层渗透的路径,避免了金属基底/涂层界面可能发生的反应。EP-Al/CNT/Al_(2)O_(3)保持了一次时间常数特性,并在整个暴露时间内表现出最高的阻抗和最强的稳定性。这些添加剂的存在增强了涂层,从而改善了涂层的屏障性能。

关键词：铝复合材料环氧树脂复合材料涂层腐蚀电化学阻抗图谱(EIS) Tafel极化

Surveying organic matter， thermal maturity level， and paleo-environmental conditions by considering biomarker and stable carbon isotopic analysis

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Journal of Earth Science 2024年

作者： meysam Hemmati Yaser Ahmadi Behzad Vaferi Ali Hosin Alibak David A.Wood DWA Energy Limited School of Geology， College of Science， University of Tehran Petroleum Engineering Department， Faculty of Engineering， Soran University Department of Chemical Engineering， Shiraz Branch， Islamic Azad University Chemical and Petroleum Engineering Department， Ilam University

Biomarker and stable carbon isotope analyses are presented for the Garau formation of the Cretaceous age， an important source rock in western Iran， to reveal its potential as an oil-prone source rock. The C28/C29sterane ratio value range (0.72 to 0.83) of bitumen samples from the formation suggests that they were likely formed during phytoplankton blooms. Sterane， hopane， and isoprenoid/n-alkane ratios indicate that the formation’s organic matter predominantly consists of algae， and bacteria， accompanied by some reworked material derived from higher plants. Due to the predominance of anoxic conditions and the actions of sulfate-reducing bacteria， the bitumen present is enriched with sulfur compounds. The percentages of saturates， aromatics， and nitrogen-sulfur-oxygen (NSO) fractions in the bitumen samples classify them as naphthenic oils. Isotope analysis reveals that biodegradation and water-washing have reduced the concentrations of some volatile saturates and low molecular weight aromatics in the bitumen samples. These actions have resulted in distinctive δ13C values for the formation’s kerogen and bitumen fractions. The formation’s organic matter has been subjected to high-temperature thermal regimes and has entered the oil-generation window at the sampled localities， with vitrinite reflectance (%RC) varying between 0.7% and 0.75%.

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Ductility improvement of GFRP-RC beams using precast confined concrete block in compression zone

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Frontiers of Structural and Civil Engineering 2023年第10期17卷 1585-1598页

作者： Nooshin G.AMIRABAD Farshid J.ALAEE meysam JALALI Civil Engineering Department Shahrood University of TechnologyShahrood ***Iran

Fiber-reinforced polymers(FRPs)have received considerable research attention because of their high strength,corrosion resistance,and low ***,owing to the lack of ductility in this material and the quasi-brittle behavior of concrete,FRP-reinforced concrete(FRP-RC)beams,even with flexural failure,do not fail in a ductile *** the limited deformation capacity of FRP-RC beams depends on the ductility of their compression zones,the present study proposes using a precast confined concrete block(PCCB)in the compression zone to improve the ductility of the beams.A control beam and four beams with different PCCBs were cast and tested under four-point bending *** control beam failed due to shear,and the PCCBs exhibited different confinements and *** goal was to find an appropriate PCCB for use in the compression zone of the beams,which not only improved the ductility but also changed the failure mode of the beams from shear to *** the employed blocks,a ductile PCCB with low equivalent compressive strength increased the ductility ratio of the beam to twice that of the control *** beam failed in pure flexure with considerable deformation capacity and without significant stiffness reduction.

关键词： ductility four-point bending test glass fiber-reinforced polymer precast confined concrete block

Experimental investigation and prediction of free fall jet scouring using machine learning models

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International Journal of Sediment Research 2023年第3期38卷 405-420页

作者： Farzin Salmasi Parveen Sihag John Abraham meysam Nouri Department of Water Engineering Faculty of Agriculture University of Tabriz Department of Civil Engineering Chandigarh University School of Engineering University of St.Thomas Minnesota Department of Water Engineering Faculty of Agriculture Urmia University Department of Civil Engineering Saeb University

The current study deals with the depth of scour at the location of impact between a free fall jet and a riverbed. The current study is based on extensive laboratory experiments that were designed to mimic full-scale behavior. The literature review shows that relations among hydraulic parameters for predicting the depth of scour are complex; therefore, six artificial intelligence techniques are used in the current study to capture these complex relation. A total of 120 observations are used for the analysis. Results from the experiments show that with increasing downstream water depth(h), the impinging jet causes increasingly turbulent currents and large vortices that increase the scouring of the riverbed. Increasing discharge per unit width(q) enhances the relative scour depth(D/H) while increasing the average diameter of the riverbed materials(d) decreases D/H, where D is maximum scour depth and H is the height of the falling jet. With increasing(particle Froude number Fr), the relative scour depth *** the current study the prediction accuracy of Gene Expression Programming(GEP), Multivariate Adaptive Regression Spline(MARS), M5P Tree, Random Forest(RF), Random Tree(RT), and Reduces Error Pruning Tree(REP Tree) techniques are evaluated using the relative scour depth(D/(H-h)). The performance evaluation indices and graphical methods suggest that the GEP based model is more accurate than other prediction methods for the relative scour depth with a coefficient of determination(R2) equal to 0.8330 and 0.8270, a mean absolute error(MAE) equal to 0.1125 and 0.0902, root mean square error(RMSE) values of 0.1463 and 0.1116, and Willmott’s Index(WI) equal to 0.8998 and 0.9014, for the training and testing stages.

关键词： Free jet Scour Gene Expression Programming (GEP) Random Forest (RF) Multivariate Adaptive Regression Spline (MARS)

Effects of heat treatment on the corrosion behavior and mechanical properties of biodegradable Mg alloys

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Journal of Magnesium and Alloys 2022年第7期10卷 1737-1785页

作者： meysam Mohammadi Zerankeshi Reza Alizadeh Ehsan Gerashi Mohammad Asadollahi Terence G.Langdon Department of Materials Science and Engineering Sharif University of TechnologyTehranIran Materials Research Group Department of Mechanical EngineeringUniversity of SouthamptonSouthampton SO171BJUnited Kingdom

Biodegradable magnesium(Mg)alloys exhibit great potential for use as temporary structures in tissue engineering *** degradable implants require no secondary surgery for their *** addition,their comparable mechanical properties with the human bone,together with excellent biocompatibility,make them a suitable candidate for fracture ***,some challenges *** degradation of the Mg-based alloys in physiological environments leads to a loss of the mechanical support that is needed for complete tissue healing and also to the accumulation of hydrogen gas bubbles at the interface of the implant and *** different methods used to improve the performance of the biodegradable Mg alloys to address these challenges,it appears that heat treatment is the most effective way to modify the microstructure and thus the corrosion behavior and mechanical properties without changing the composition or shape of the alloys.A desirable combination of corrosion and mechanical properties can be obtained through a precise control of the heat treatment *** this report,the effects of different heat treatments(T4 and T6)on the microstructure,corrosion behavior,and mechanical properties of some of the most important heat-treatable biodegradable Mg alloys(Mg-Zn,Mg-Gd,Mg-Y,Mg-Nd,Mg-Al and Mg-Ag)are examined as well as new perspectives to enhance their clinical implementation.

关键词： Biodegradable implants Corrosion rate Heat treatment Mechanical properties Mg alloys

Seismic vulnerability assessment of urban buildings using the rough set theory and weighted linear combination

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Journal of Mountain Science 2022年第3期19卷 849-861页

作者： Yasaman ASADI Najmeh NEYSANI SAMANY Majid KIAVARZ MOQADAM Ata ABDOLLAHI KAKROODI meysam ARGANY Department of Remote Sensing and GIS Faculty of GeographyUniversity TehranTehran 33137-67464Iran

Seismic vulnerability assessment of urban buildings is among the most crucial procedures to post-disaster response and recovery of infrastructure *** present study proceeds to estimate the seismic vulnerability of urban buildings and proposes a new framework training on the two ***,a comprehensive interpretation of the effective parameters of this phenomenon including physical and human factors is ***,the Rough Set theory is used to reduce the integration uncertainties,as there are numerous quantitative and qualitative *** objectives were conducted on seven distinct earthquake scenarios with different intensities based on distance from the fault line and the *** proposed method was implemented by measuring seismic vulnerability for the seven specified seismic *** final results indicated that among the entire studied buildings,71.5%were highly vulnerable as concerning the highest earthquake scenario(intensity=7 MM and acceleration calculated based on the epicenter),while in the lowest earthquake scenario(intensity=5 MM),the percentage of vulnerable buildings decreased to approximately 57%.Also,the findings proved that the distance from the fault line rather than the earthquake center(epicenter)has a significant effect on the seismic vulnerability of urban *** model was evaluated by comparing the results with the weighted linear combination(WLC)*** accuracy of the proposed model was substantiated according to evaluation *** assessment based on the distance from the epicenter and its comparison with the distance from the fault shows significant reliable results.

关键词： Seismic vulnerability Urban buildings Rough set theory Earthquake scenarios WLC

Studies on the Ability of Carbon Nanotube(5,5) as Drug Carrier and Anticancer Properties of Benzylthio-indolyl-triazol-amine Derivatives

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Chinese Journal of Structural Chemistry 2017年第10期36卷 1679-1684页

作者： meysam Najafi Young Researchers and Elite Club Kermanshah Branch Islamic Azad University Kermanshah Iran

The anticancer activities of synthesized benzylthio-indolyl-triazol-amine derivatives 1a^1c were investigated via theoretical scales. The experimental results show that derivative 1a has the highest anticancer activity, and 1c has the lowest one. The interactions of 1a^1c with C-nanotube（5,5） were investigated. Also the quantum molecular descriptors of derivatives 1a^1c were calculated and the results show that they can interact with C-nanotube（5,5） effectively. The adsorptions of 1a^1c on C-nanotube（5,5） surface were exothermic and experimentally possible from the energetic viewpoint. The results indicated that ΔEad and ΔGad values of derivative 1a on C-nanotube（5,5） were higher than those of the corresponding derivatives 1b and 1c, so 1a has the highest ｜μ｜, ω and ｜？N｜ values and the lowest value, and the trends of theoretical anticancer activities of 1a^1c are similar to the experimental values successfully.

关键词： benzylthio-indolyl-triazol-amine adsorption energy nanotube anticancer and chemical potential