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A New Family of Unsteady Boundary layer Flow over a Magnetized Plate
Adeel Ahmad,Razi Khan 한국자기학회 2019 Journal of Magnetics Vol.24 No.1
This article investigates the unsteady flow of a viscous fluid over a magnetized moving plate emerging from a moving slot. This new family of unsteady boundary layer flow behaves similar to stretching and shrinking sheet problems depending upon the motion of the slot. The governing partial differential equations are reduced to correct similar form using the Blasius-Rayleigh-Stokes variable. Effects of moving slot and magnetic field on important physical quantities are examined. An interesting observation was the influence of magnetic field on the existence of dual solution for the range of moving slot parameter.
Mobile Botnet Attacks - an Emerging Threat: Classification, Review and Open Issues
( Ahmad Karim ),( Syed Adeel Ali Shah ),( Rosli Bin Salleh ),( Muhammad Arif ),( Rafidah Md Noor ),( Shahaboddin Shamshirband ) 한국인터넷정보학회 2015 KSII Transactions on Internet and Information Syst Vol.9 No.4
The rapid development of smartphone technologies have resulted in the evolution of mobile botnets. The implications of botnets have inspired attention from the academia and the industry alike, which includes vendors, investors, hackers, and researcher community. Above all, the capability of botnets is uncovered through a wide range of malicious activities, such as distributed denial of service (DDoS), theft of business information, remote access, online or click fraud, phishing, malware distribution, spam emails, and building mobile devices for the illegitimate exchange of information and materials. In this study, we investigate mobile botnet attacks by exploring attack vectors and subsequently present a well-defined thematic taxonomy. By identifying the significant parameters from the taxonomy, we compared the effects of existing mobile botnets on commercial platforms as well as open source mobile operating system platforms. The parameters for review include mobile botnet architecture, platform, target audience, vulnerabilities or loopholes, operational impact, and detection approaches. In relation to our findings, research challenges are then presented in this domain.
Adeel Ikram,Nadeem Ahmad Mufti1,Muhammad Qaiser Saleem,Ahmed Raza Khan 대한기계학회 2013 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.27 No.7
This paper reports the effect and optimization of eight control factors on material removal rate (MRR), surface roughness and kerf in wire electrical discharge machining (WEDM) process for tool steel D2. The experimentation is performed under different cutting conditions of wire feed velocity, dielectric pressure, pulse on-time, pulse off-time, open voltage, wire tension and servo voltage by varying the material thickness. Taguchi’s L18 orthogonal array is employed for experimental design. Analysis of variance (ANOVA) and signal-tonoise (S/N) ratio are used as statistical analyses to identify the significant control factors and to achieve optimum levels respectively. Additionally, linear regression and additive models are developed for surface roughness, kerf and material removal rate (MRR). Results of the confirmatory experiments are found to be in good agreement with those predicted. It has been found that pulse on-time is the most significant factor affecting the surface roughness, kerf and material removal rate.
Adeel Ikram,Ahmad Raza,Hyun Chung 대한용접·접합학회 2020 대한용접·접합학회지 Vol.38 No.3
This study was performed to investigate the AC-GMAW process for joining of 6 ㎜ to 8 ㎜ thick AH36 steel plates in a single pass welding using a square groove butt joint configuration. A broad range of experiments was conducted at different welding speeds and joint gaps. Initially, a suitable setting of welding speed and the joint gap was determined based on the results of penetration depth and the gap bridging ability of the welded joints. Then, the quality of the selected welded joints was examined by hardness and tensile testing. Microstructure and fractured surface analysis were carried out using scanning electron microscopy (SEM) to examine the surface morphology. Based on the experimental findings, recommendations were made for selecting suitable input welding parameters for the welding of plates up to 8 ㎜ using the AC-GMAW process.
Ikram Adeel,Raza Ahmad,정현 대한용접접합학회 2020 대한용접·접합학회지 Vol.38 No.3
This study was performed to investigate the AC-GMAW process for joining of 6 mm to 8 mm thick AH36 steel plates in a single pass welding using a square groove butt joint configuration. A broad range of experiments was conducted at different welding speeds and joint gaps. Initially, a suitable setting of welding speed and the joint gap was determined based on the results of penetration depth and the gap bridging ability of the welded joints. Then, the quality of the selected welded joints was examined by hardness and tensile testing. Microstructure and fractured sur�face analysis were carried out using scanning electron microscopy (SEM) to examine the surface morphology. Based on the experimental findings, recommendations were made for selecting suitable input welding parameters for the welding of plates up to 8 mm using the AC-GMAW process.
Designing CuSe-gCN nanocomposite as an active electrocatalyst for water oxidation
Alharbi Fatemah Farraj,Ahmad Zahoor,Chughtai Adeel Hussain,Khosa Rabia Yasmin,Farid Hafiz Muhammad Tahir 한국화학공학회 2023 Korean Journal of Chemical Engineering Vol.40 No.9
CuSe-gCN nanocrystals were premeditated and produced utilizing a simple hydrothermal method. Different analytical techniques well characterized the generated samples. The prepared samples also contain nanocrystals with a vertical shape, decorated with numerous nanoparticles. All characterizations confirm the phase composition of composite CuSe-gCN. The pore size of the N2 adsorption-desorption isotherm also pointed to a mesoporous structure. Furthermore, the combination of distinct morphology nanoparticles embellished on gCN graphitized nanotubes helps to achieve larger current densities and lower starting potentials for the oxygen evolution process. Because of their unique mesoporous structure, the CuSe-gCN catalysts show exceptional electrical conductivity and electrocatalytic activity. Compared to monometallic CuSe and gCN, CuSe-gCN significantly lower overpotential of 208 mV was needed to obtain a current density of 10 mA/cm2. The CuSe-gCN nanocrystals displayed good stability and a low Tafel slope of 35 mV/dec. This research shows that it is possible to use a copper-based selenide with gCN and combine all the beneficial characteristics in a single catalyst system.. Still, it also offers fresh perspectives on the logical proposal and creation of effective electrocatalysts for various applications.
Iftikhar Aslam Tayubi,Ahmad Firoz,Omar M. Barukab,Adeel Malik 한국유전학회 2015 Genes & Genomics Vol.37 No.8
The West Nile virus (WNV) infections are generally asymptomatic and are considered as immediate concerns of biodefense due to the lack of any therapeutic remedies. In this work, we created an interaction network of 1159 differentially expressed genes to detect potential hub genes from WNV infected primary human macrophages. We go on to explore the genetic variations that can alter the expression and function of identified hub genes (HCLS1, SLC15A3, HCK, and LY96) using the PROVEAN Protein Batch tool and PolyPhen-2. Community analysis of the network revealed that these clusters were enriched in GO terms such as inflammatory response and regulation of proliferation. Analysis of hub genes can aid in determining their degree of conservation and may help us in understanding their functional roles in biological systems. The nsSNPs proposed in this work may be further targeted through experimental methods for improving treatment towards the infection of WNV.
The electrical, dielectric and magnetic effect of MgFe2O4–polypyrrole and its composites
Alburaih H. A.,Khan Sajjad Ahmad,Khosa Rabia Yasmin,Ejaz Syeda Rabia,Khan Abdul Rauf,Muhammad Ghulam,Waheed Muhammad Suleman,Chughtai Adeel Hussain,Manzoor Sumaira,Aman Salma 한국세라믹학회 2023 한국세라믹학회지 Vol.60 No.2
In the modern world of health and life sciences, the utilization of nanoscale materials, particularly magnetic nanoparticles, is a hot topic. Here in the present study, MgFe2O4 is synthesized via the chemical co-precipitation technique, and the polypyrrole (PPy) is fabricated via in situ polymerization technique to form the MgFe2O4/PPy nanocomposite by varying its content in the ferrite material. The electrical, magnetic, and dielectric properties of the fabricated materials were studied to investigate their applications in electronic devices. The magnetization saturation Ms, remanence Mr and coercivity Hc increase with the addition of ferrite material. The activation of the fabricated material increases from 0.11 to 0.34 eV, indicating the increase in electrical resistivity. The other important parameters such as squareness ratio and drift mobility were also calculated. The increment in DC electrical resistivity, saturation magnetic magnetization and remanence as well as reduction in dielectric constant values with the ferrite material addition in the polypyrrole suggest that the materials can be beneficial for recording media as well as high-frequency devices.
Expression of Transthyretin during bovine myogenic satellite cell differentiation.
Pokharel, Smritee,Kamli, Majid Rasool,Mir, Bilal Ahmad,Malik, Adeel,Lee, Eun Ju,Choi, Inho Springer 2014 In vitro cellular & developmental biology Animal Vol.50 No.8
<P>Adult myogenesis responsible for the maintenance and repair of muscle tissue is mainly under the control of myogenic regulatory factors (MRFs) and a few other genes. Transthyretin gene (TTR), codes for a carrier protein for thyroxin (T4) and retinol binding protein bound with retinol in blood plasma, plays a critical role during the early stages of myogenesis. Herein, we investigated the relationship of TTR with other muscle-specific genes and report their expression in muscle satellite cells (MSCs), and increased messenger RNA (mRNA) and protein expression of TTR during MSCs differentiation. Silencing of TTR resulted in decreased myotube formation and decreased expression of myosin light chain (MYL2), myosin heavy chain 3 (MYH3), matrix gla protein (MGP), and voltage-dependent L type calcium channel (Cav1.1) genes. Increased mRNA expression observed in TTR and other myogenic genes with the addition of T4 decreased significantly following TTR knockdown, indicating the critical role of TTR in T4 transportation. Similarly, decreased expression of MGP and Cav1.1 following TTR knockdown signifies the dual role of TTR in controlling muscle myogenesis via regulation of T4 and calcium channel. Our computational and experimental evidences indicate that TTR has a relationship with MRFs and may act on calcium channel and related genes.</P>