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Data Analysis of Network Parameters for Secure Implementations of SDN-Based Firewall

Computers, Materials & Continua 2023年第11期77卷 1575-1598页

作者： Rizwan Iqbal Rashid Hussain Sheeraz Arif Nadia Mustaqim Ansari Tayyab Ahmed Shaikh Department of Telecommunication engineering Dawood University of Engineering&TechnologyKarachiPakistan Faculty of engineering Sciences and technology Hamdard UniversityKarachiPakistan Faculty of Information technology Salim Habib UniversityKarachiPakistan Department of Electronic engineering Dawood University of Engineering&TechnologyKarachiPakistan

Software-Defined Networking(SDN)is a new network technology that uses programming to complement the data plane with a control *** enable safe connection,however,numerous security challenges must be *** attacks have been one of the most prominent risks on the internet for decades,and they are now becoming challenging difficulties in SDN *** solve these challenges,we proposed a unique firewall application built on multiple levels of packet filtering to provide a flooding attack prevention system and a layer-based packet detection *** study offers a systematic strategy for wrapping up the examination of SDN *** Mininet simulator examines the effectiveness of SDN-based firewalls at various network *** fundamental network characteristics that specify how SDN should *** three main analytical measures of the network are jitter,response time,and *** regular operations,their behavior evaluates in the standard SDN conditions of Transmission Control Protocol(TCP)flooding and User Datagram Protocol(UDP)flooding with no SDN *** Orbit Ion Cannon(LOIC)is applied to launch attacks on the transmission by the allocated *** and MATLAB are used for the behavioral study to determine how sensitive the parameters are used in the SDN network and monitor the fluctuations of those parameters for different simulated scenarios.

关键词： Software defined networking firewall POX controller open v switch Mininet OpenFlow

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Invariant of Enhanced AES Algorithm Implementations Against Power Analysis Attacks

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Computers, Materials & Continua 2022年第7期72卷 1861-1875页

作者： Nadia Mustaqim Ansari Rashid Hussain Sheeraz Arif Syed Sajjad Hussain Department of Electronic engineering Dawood University of Engineering&TechnologyKarachiPakistan Faculty of engineering Sciences and technology Hamdard UniversityKarachiPakistan Faculty of Information technology Salim Habib UniversityKarachiPakistan Faculty of Computer Sciences SZABISTKarachiPakistan

The security of Internet of Things(IoT)is a challenging task for researchers due to plethora of IoT *** Channel Attacks(SCA)are one of the major *** prime objective of SCA is to acquire the information by observing the power consumption,electromagnetic(EM)field,timing analysis,and acoustics of the ***,the attackers perform statistical functions to recover the *** Encryption Standard(AES)algorithm has proved to be a good security solution for constrained IoT *** paper implements a simulation model which is used to modify theAES algorithm using logicalmasking *** invariant of the AES algorithm hides the array of bits during substitution byte transformation of *** model is used against SCAand particularly Power Analysis Attacks(PAAs).Simulation model is designed on MATLAB *** will give better solution by hiding power profiles of the IoT devices against *** future,the lightweight AES algorithm with false key mechanisms and power reduction techniques such as wave dynamic differential logic(WDDL)will be used to safeguard IoT devices against side channel attacks by using Arduino and field programmable gate array(FPGA).

关键词： Side channel attacks power analysis attacks network security masking advance encryption standard

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Effect of ultrasonic assisted KOH pretreatment on physiochemical characteristic and anaerobic digestion performance of wheat straw

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Chinese Journal of Chemical engineering 2020年第9期28卷 2409-2416页

作者： Rashid Mustafa Korai Xiujin Li Department of Environmental Science&engineering Beijing University of Chemical TechnologyBeijing 100029China Department of Petroleum&Gas engineering Dawood University of Engineering&TechnologyNew M-A.Jinnah RoadKarachi-74800Pakistan

In this study,ultrasonic field was applied during potassium hydroxide(KOH) pretreatment of wheat straw(WS).Three concentrations of KOH(2%,4%,and 6%) were tested during *** results showed that there was a significant influence of the ultrasonic assisted KOH pretreatment(KOH(Upt)) on physiochemical characteristics of WS during pretreatment as well as on digester *** pretreatment time was optimized to 36 h for all KOH *** highest total volatile fatty acid(TVFA) productions(3189 mg·L^-1) from 6%KOHupt samples were ***,the SEM analysis and FTIR observation revealed that KOH(Upt) effectively disrupted the physical morphology of WS and successful breaking of lignin and hemicellulose linkage between carboxyl ***,the highest biogasification(555 ml·(g VS(loaded))^-1) and biomethane productions(282 ml·(g VS(loaded))^-1) from 4%KOH(Upt) digesters,with 69% of biodegradability,indicated significant availability of organic matter from KOH(Upt).The R^2 values(0.993-0.998) in Modified Gompertz Model indicated that the model was feasible to predict methane yield for this ***,the Bo values for 4%KOH(Upt)(283.30±2.74 ml·(gVS(loaded))^-1) were also in agreement to the experimental methane *** results suggested that ultrasonic addition during KOH pretreatment of WS can effectively increase the organic yield during ***,the increase in methane production from 4% KOH(Upt) suggested that digester performance can be improved with lower KOH concentrations using this pretreatment.

关键词： Ultrasonic pretreatment Potassium hydroxide(KOH) Wheat straw Anaerobic digestion Biogasification Biomethane

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Synthesized graphene oxide and fumed aerosil 380 dispersion stability and characterization with partially hydrolyzed polyacrylamide

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Chinese Journal of Chemical engineering 2021年第6期34卷 307-322页

作者： Najeebullah Lashari Tarek Ganat Department of Petroleum engineering Universiti Teknologi PETRONAS32610 Seri IskandarPerak Darul RidzuanMalaysia Department of Petroleum and Gas engineering Dawood University of Engineering&TechnologyM.A Jinnah RoadKarachi 74800Pakistan

Hydrolyzed polyacrylamide(HPAM)is a commonly used polymer for the chemicals,mining and refining processes of hydrocarbon but suffers from a persistent high-temperature instability *** contrast,the nanoparticle suspension remains a technical challenge because of the strong interactions of van der Waal forces within nanoparticles,which always encourage *** research sought to improve nanoparticles(NP)stability and polymer(HPAM)rheological properties to improved hydrocarbon recovery by utilizing synthesized graphene oxide(GO)nanosheets and fumed Aerosil 380 Silica oxide(SiO_(2)).The aqueous nanocomposites based on HPAM-GO and HPAM-SiO_(2) in aqueous polymeric solutions have been developed,and its viscoelastic and static behaviour is *** results imply that by adding fumed silica NP,the viscoelastic behaviour of HPAM is marginally improved,particularly in high temperatures and salinity,however,the inclusion of GO's significantly improves the viscosity and stability of the base polymer fluid at high *** Fourier data for the transformation of the infrared spectrum confirmed that the hydrogen bonding formed between HPAM carbonyl groups and silica NP surface silanol functionality and covalent interlinking of electrostatic h-bonding between HPAM and functional GO contributed to the improved stabilization and improved rheological performance that helps to recover high salinity and temperature hydrocarbons.

关键词： Aggregation Composites Chemical enhance oil recovery Hydrocarbons Nanoparticles Polymer

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Thermal degradation of diethanolamine at stripper condition for CO2 capture: Product types and reaction mechanisms

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Chinese Journal of Chemical engineering 2019年第12期27卷 2900-2908页

作者： Idris Mohamed Saeed Brahim Si Ali Badrul Mohamed Jan Wan Jefrey Basirun Shaukat Ali Mazari Ibrahim Ali Obid Birima Department of Chemistry Faculty of ScienceUniversity of MalayaKuala Lumpur 50603Malaysia Department of Chemical engineering Faculty of EngineeringUniversity of MalayaKuala Lumpur 50603Malaysia Department of Chemical engineering Faculty of EngineeringDawood University of Engineering and TechnologyMA Jinnah RoadKarachi 74800Pakistan

Amine-based absorption/stripping is one of the promising technology for CO2 capture from natural and industrial gas *** the process,amines and CO2 undergo irreversible reactions to produce undesired compounds,which cause corrosion,foaming,increased viscosity and breakdown of equipment,ultimately contributing to the economic loss and environmental *** this study,the thermal degradation of aqueous diethanolamine in the presence and absence of dissolved CO2 was *** experiments were performed in stainless steel *** results show that thermal degradation in the absence of CO2 was a slow process;triethanolamine,and tris(2-aminoethyl)amine were only the degradation products identified in the mixture In addition,the rate of degradation was very low,only 3%degradation was observed after 4 *** in the presence of CO2,sixteen degradation products were identified,nine of which were new degradation products reported for the first time in this *** 3-(2-hydroxyethyl)-2-oxazolidinone,1,4-bis(2-hydroxyethyl)piperazine and triethanolamine were the most abundant degradation *** remaining DEA concentration after 4 weeks was about 20%of the total amine *** most probable degradation reactions and their mechanisms are also proposed.

关键词： Diethanolamine CO2 capture Degradation Mechanism

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Emerging applications of nanomaterials in chemical enhanced oil recovery:Progress and perspective

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Chinese Journal of Chemical engineering 2020年第8期28卷 1995-2009页

In enhanced oil recovery,different chemicalmethods utilization improves hydrocarbon recovery due to their fascinating abilities to alter some critical parameters in porous media,such as mobility control,the interaction between fluid to fluid,and fluid to rock *** decades the use of surfactant and polymer flooding has been used as tertiary recovery *** the current research,the inclusion of nanomaterials in enhanced oil recovery injection fluids solely or in the presence of other chemicals has got colossal *** emphasis of this review is on the applicability of nanofluids in the chemical enhanced oil *** responsiblemechanisms are an increment in the viscosity of injection fluid,decrement in oil viscosity,reduction in interfacial and surface tension,and alteration of wettability in the rock *** this review,important parameters are presented,which may affect the desired behavior of nanoparticles,and the drawbacks of nanofluid and polymer flooding and the need for a combination of nanoparticles with the polymer are *** to the lack of literature in defining the mechanism of nanofluid in a reservoir,this paper covers majorly all the previous work done on the application of nanoparticles in chemical enhanced oil recovery at home ***,the problems associatedwith the nano-enhanced oil recovery are outlined,and the research gap is identified,which must be addressed to implement polymeric nanofluids in chemical enhanced oil recovery.

关键词： Chemical enhanced oil recovery Mechanisms Nanoparticles Polymeric Nanofluids

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Modeling the rate of corrosion of carbon steel using activated diethanolamine solutions for CO2 absorption

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Chinese Journal of Chemical engineering 2020年第8期28卷 2099-2110页

作者： Lubna Ghalib Ahmed Abdulkareem Brahim Si Ali Shaukat Ali Mazari Materials engineering Department Mustansiriyah UniversityBaghdad 14022Iraq Mathematics Science Directorate General of Education Rusafa 1BaghdadIraq Department of Chemical engineering University of Malaya50603 Kuala LumpurMalaysia Department of Chemical engineering Dawood University of Engineering and TechnologyKarachi 74800Pakistan

A mechanistic model is developed to investigate the influence of an activator on the corrosion rate of carbon steel in the absorption processes of carbon dioxide(CO2).Piperazine(PZ)is used as the activator in diethanolamine(DEA)aqueous *** developed model for corrosion takes into consideration the effect of fluid flow,transfer of charge and diffusion of oxidizing agents and operating parameters like temperature,activator concentration,CO2 loading and *** study consists of two major models:Vapor–liquid Equilibrium(VLE)model and electrochemical corrosion *** electrolyte-NRTL equilibrium model was used for determination of concentration of chemical species in the bulk *** results of speciation were subsequently used for producing polarization curves and predicting the rate of corrosion occurring at the surface of *** increase in concentration of activator,increases the rate of corrosion of carbon steel in mixtures of activated DEA.

关键词： CO2 capture CO2 corrosion Carbon steel Diethanolamine Piperazine Electrochemical model

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Sustainable bio-energy generation via the conversion of spent wash using dual chamber microbial fuel cell

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Waste Disposal and Sustainable Energy 2024年第2期6卷 219-231页

作者： Abdul Sattar Jatoi Jawad Ahmed Afaque Ahmed Bhutto Muhammad Shuaib Shaikh Department of Chemical engineering Dawood University of Engineering and Technology KarachiSindhPakistan Changzhou DUBO Polymer Co. Ltd.Changzhou 213002China Department of Basic Science and Related Studies The University of LarkanoSindhPakistan Department of Chemical engineering Mehran University of Engineering and Technology JamshoroSindhPakistan

Microbial fuel cells(MFCs)are innovative devices that combine microbial processes with electrochemical reactions to convert organic matter in wastewater into electricity while simultaneously treating the *** such application is the treatment of spent wash,a highly polluting effluent generated from the distillery industry after crude mesh is separated into ethanol and spent *** wash,also known as distillery effluent or stillage,is a highly challenging wastewater treatment method due to its high chemical oxygen demand(COD),biological oxygen demand(BOD),and total dissolved solids(TDS).These characteristics make it a complex and polluting industrial effluent that requires specialized treatment processes to reduce its environmental impact ***,MFCs have shown promise in treating spent wash,as they can utilize the organic matter in wastewater as a fuel source for microbial growth as well as for electricity *** the treatment of spent wash,Saccharomyces cerevisiae *** used as a biocatalyst along with 340 mol/L potassium ferricyanide in the cathode chamber and 170 mol/L methylene blue in the anode as a *** tests were conducted by balancing a one-liter volume for power production from spent wash in MFC with the optimal conditions of 10%agarose,pH 8.5,300 mL/min of aeration in the cathode chamber,and 40%(in weight)substrate *** an ideal concentration,the maximum current and power density are roughly 53.41 mA/m^(2)and 72.22 mW/m^(2),*** each litre of processed spent wash,a maximum voltage of 850 mV(4.5 mA)was ***,91%of COD and BOD were removed from the effluent *** findings show that MFCs are capable of producing electricity and efficiently removing COD from wasted wash at the same time.

关键词： Microbial fuel cell Chemical oxygen demand Biological oxygen demand-Current density Power density Spent wash

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Multi-Band Metamaterial Antenna for Terahertz Applications

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Computers, Materials & Continua 2023年第1期74卷 1765-1782页

作者： Adel Y.I.Ashyap M.Inam M.R.Kamarudin M.H.Dahri Z.A.Shamsan K.Almuhanna F.Alorifi Faculty of engineering technology Universiti Tun Hussein Onn Malaysia(UTHM)Batu Pahat86400JohorMalaysia Centre for Telecommunication Research&Innovation(CETRI) Faculty of Electrical and Electronic Engineering TechnologyUniversiti Teknikal Malaysia Melaka(UTeM)Melaka76100Malaysia Department of Electronic engineering Dawood University of Engineering and Technology74800KarachiPakistan Electrical engineering Department College of EngineeringImam Mohammad Ibn Saud Islamic UniversityRiyadhSaudi Arabia

A multi-band metamaterial antenna is proposed to operate at the terahertz(THz)band for medical *** proposed structure is designed on a polyimide as a support layer,and its radiating elements are made of ***,the design is started with a conventional shape showing a single operating frequency at 1.1 *** achieve a multi-band operating frequency,the conventional shape was replaced with the proposed metamaterial as a radiating patch that has properties not exist in *** multi-band frequencies are obtained without compromising the overall size of the *** overall size is 600×600×25μm^(3).The operating frequencies are 0.36,0.49,0.69,0.87,and 1.04 THz.A full ground plane is used to behave as isolation between the design and the human body *** proposed design is investigated on free space and on the human body model,showing excellent performance in both *** achieved gains for the following frequencies 0.36,0.49,0.69,0.87,and 1.04 THz are 4.81,6.5,8.41,6.02,and 7.96 dB,respectively,while the efficiencies are 83.91%,96.28%,90.80%,91.71%,and 92.99%,*** conventional design was modified to have a partial ground to show the benefit of using the full *** design is loaded on the human body model and its performance is *** efficiency and gain are 6.61 dB and 95.58.7%for the case of no human body model,and 4.26 dB and 40.30%for the case of using a human body ***,the proposed metamaterial antenna will be useful for future medical applications in the THz band.

关键词： THz 5G a multi-band metamaterials 6G WBAN

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Linearly Polarized Millimeter Wave Reflectarray with Mutual Coupling Optimization

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Computers, Materials & Continua 2022年第8期72卷 2397-2410页

作者： M.Inam M.H.Dahri M.R.Kamarudin A.Y.I.Ashyap M.H.Jamaluddin N.H.Sulaiman M.A.Khan Z.A.Shamsan K.Almuhanna F.Alorifi Centre for Telecommunication Research&Innovation(CETRI) Faculty of Electrical and Electronic Engineering TechnologyUniversiti Teknikal Malaysia Melaka(UTeM)Melaka76100Malaysia dawood university of engineering and technology karachi city Sindh74800Pakistan Faculty of Electrical and Electronic engineering Universiti Tun Hussein Onn MalaysiaBatu Pahat86400JohorMalaysia Wireless Communication Centre Universiti Teknologi MalaysiaJohor Bahru81301Malaysia Faculty of Computing and engineering Quest International UniversityIpoh30250PerakMalaysia Balochistan university of Information technology(FICT) Engineering and Management SciencesQuettaPakistan Electrical engineering Department College of EngineeringImam Mohammad Ibn Saud Islamic UniversityRiyadhSaudi Arabia

This work provides the design and analysis of a single layer,linearly polarized millimeter wave reflectarray antenna with mutual coupling *** analysis was carried out at 26GHz design frequency using the simulations of the reflectarray unit cells as well as the periodic reflectarray *** simulated results were verified by the scattering parameter and far-fieldmeasurements of the unit cell and periodic arrays,*** agreement between the simulated and measured results was observed in all the *** from the unit cells and reflectarray,the waveguide and horn antenna were also fabricated to be used in the *** measured scattering parameter results of the proposed circular ring unit cells provided a maximum reflection loss of 2.8 dB with phase errors below 10°.On the other hand,the measured far-field results of the 20×20 reflectarray antenna provided a maximum gain of 26.45 dB with a maximum 3 dB beam width of 12°and 1 dB gain drop bandwidth of 13.1%.The performance demonstrated by the proposed reflectarray antenna makes it a potential candidate to be used in modern-day applications such as 5th Generation(5G)and 6th Generation(6G)communication systems.

关键词： Reflectarray millimeter wave antenna mutual coupling antenna measurements

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