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Heat transfer analysis of MHD rotating flow of Fe_(3)O_(4)nanoparticles through a stretchable surface

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Communications in Theoretical Physics 2021年第7期73卷 27-41页

作者： faisal shahzad Wasim Jamshed Tanveer Sajid Kottakkaran Sooppy Nisar Mohamed R Eid Department of Mathematics Capital University of Science and Technology(CUST)Islamabad44000Pakistan Department of Mathematics College of Arts and SciencesPrince Sattam bin Abdulaziz UniversityWadi AldawaserSaudi Arabia Department of Mathematics Faculty of ScienceNew Valley UniversityAl-KhargaAl-Wadi Al-Gadid72511 Egypt Department of Mathematics Faculty of ScienceNorthern Border UniversityArar1321Saudi Arabia

The flow of a magnetite-H_(2)O nanofluid has been considered among two rotating surfaces,assuming porosity in the upper ***,the lower surface is considered to move with variable speed to induce the forced *** as well as Coriolis forces impacting on the rotating fluid are likewise taken into *** conversions are employed for the transformation of the governing partial-differential equations into a group of non-dimensional ordinary-differential *** solution of the converted expressions is gained by means of the shooting *** is theoretically found that the nanofluid has less skin friction and advanced heat transport rate when compared with the base *** effect of rotation causes the drag force to elevate and reduces the heat transport *** are portrayed to reveal the impact of injection/suction.

关键词： rotating frame magnetite-water nanofluid flow magnetic field stretching sheet

Petrophysical relationship for density prediction using Vp & Vs in Meyal oilfield, Potwar sub-basin, Pakistan

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Geodesy and Geodynamics 2018年第2期9卷 151-155页

作者： Gulraiz Akhter Younis Khan Anees Ahmad Bangash faisal shahzad Yawar Hussain Department of Earth Sciences Quaid-i-Azam University Key Laboratory of Mineral Resources Institute of Geology and Geophysics Chinese Academy of Sciences National Centre of Excellence in Geology (NCEGS) University of Peshawar Research and Development Department Department of Civil and Environmental Engineering University of Brasilia

Conventional petrophysical investigations are based on P-wave seismic velocity analysis to predict density information, while ignoring the important S-wave velocity. This study is based on S-wave velocity analysis of density estimation of Meyal Oil Field(Potwar Plateau, Pakistan), which reveals a very high correlation(R=0.87) between predicted and actual density. Since the availability of S-wave velocity(Vs) data increases, it’s highly appreciable to take into account the contribution of Vs in improvement of density estimates. This investigation only focuses on driving new constants(a = 1.92 and b = 0.186) for Gardner’s relationship to estimate density of pure carbonates(Vsh< 10%) in the study area, where the traditional model gave poorer density predictions. The proposed empirical expression with locally extracted unknowns from well log data proved its ability in terms of density prediction(showing very close agreement with measured densities) and best fitting the datasets at low as well as high density values when compared with Gardner’s equation. Based on our analysis, the exploratory study neither intends to replace the well established density estimation models nor to extend information over what information can possibly be extractable from Vp. However, our research does stimulate the growing use of Vs and importance of local unknown constants especially in carbonates reservoir interval to avoid misuse of most widely used Gardner relation in all geological settings.

关键词： Shale Gardner Potwar Carbonates S-Waves

Chen’s Inequalities for Submanifolds in (<i>&kgreen;, &#181</i>)-Contact Space Form with a Semi-Symmetric Non-Metric Connection

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Journal of Applied Mathematics and Physics 2018年第2期6卷 389-404页

作者： Asif Ahmad faisal shahzad Jing Li Department of Mathematics Nanjing University of Science and Technology Nanjing China

In this paper, we obtain Chen’s inequalities in (k,?μ)-contact space form with a semi-symmetric non-metric connection. Also we obtain the inequalites for Ricci and K-Ricci curvatures.

关键词： (k µ)-Contact Space Form Semi-Symmetric Non-Metric Connection Chen’s Inequalities Ricci Curvature

Improving Network Efficiency by Selecting and Modifying Congestion Control Constraints

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Communications and Network 2014年第2期6卷 105-111页

作者： Saleem Ullah faisal shahzad shahzada Khurram Waheed Anwer Department of Computer Science & IT The Islamia University of Bahawalpur Bahawalpur Pakistan

Congestion in wired networks not only causes severe information loss but also degrades overall network performance. To cope with the issue of network efficiency, in this paper we have pro- posed and investigated an efficient mechanism for congestion control by the selection of appropri- ate congestion window size and proactive congestion avoidance, which improves system overall performance and efficiency. The main objective of this work is to choose the accurate size of con- gestion window based on available link bandwidth and round trip time (RTT) in cross and grid topologies, instead of choosing number of hops (Previous researches), we have achieved significant improvement in the overall performance of the network. General simulation results under distinctive congestion scenarios are presented to illuminate the distinguished performance of the proposed mechanism.

关键词： Congestion Avoidance Congestion Control Congestion Window (cwnd) Network Performance

A methachromatic-based experimental model for identification of bowel as the focus of an acute inflammation

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Open Journal of Gastroenterology 2013年第1期3卷 42-48页

作者： Sravya Sowdamini Nakka Jessica Johansson faisal shahzad Anders Hanning Fariba Nayeri R+D Department Institution for Protein Environmental Affinity SurveysPEAS InstitutLinkopingSweden Department of Clinical Medicine School of Health and Medical Sciencesorebro UniversityorebroSweden Episentec AB Fjallvagen L BSollentunaSweden Division of Infectious Diseases Department of Clinical and Experimental MedicineLinkoping University HospitalLinkopingSweden

Diarrhea is the most common symptom of acute inflammation in gastrointestinal tract and the patients are isolated in order to inhibit transmission and to conduct investigations. Yet there is no standard test to distinguish gastrointestinal infection from more generalized diseases at admittance which might cause delay in therapy. Hepatocyte growth factor (HGF) is produced upon injury by mesenchymal cells. On the contrary to chronic inflammation, HGF produced in the course of acute inflammation is biologically active and shows binding affinity to heparan sulphate proteoglycan (HSPG) and dextran sulphate (DS). Based on this phenomenon, an agarose gel containing DS was prepared and immobilized on loops to investigate the feces samples for the presence or absence of growth factors such as HGF with affinity to DS. The study is conducted as a clinical evaluation of an experimental model to distinguish acute infectious gastroenteritis from other causes of diarrhea. 656 fecal samples gathered consequently from patients seeking for bowel disturbances and healthy were tested by the test and the medical reports were investigated. Upon interaction with DS, methylene blue changes color to pink. This phenomenon was inhibited by HGF and converted by addition of anti-HGF antibodies to the samples. The test distinguished acute infectious gastroenteritis with high sensitivity and specificity (96% and 92% respectively) from other causes of diarrhea. We introduce a metachromatic experimental model that might distinguish acute inflammation in alimentary tract from other causes of diarrhea. This model might be used in developing rapid diagnostic tests.

关键词： Gastroenteritis Hepatocyte Growth Factor HSPG Metachromasy Rapid Test

High concentration but low biological activity of hepatocyte growth factor in patients with chronic renal failure

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Advances in Bioscience and Biotechnology 2012年第4期3卷 516-523页

作者： Johanna Lonn faisal shahzad Fredrik Uhlin Torbjörn Bengtsson Gabriel Almroth Fariba Nayeri PEAS Institute LinkopingSweden Division of Clinical Medicine School of Health and Medical SciencesOrebro UniversityOrebroSweden Department of Nephrology UHL County Council of OstergotlandDepartment of Medicine and Health ScienceFaculty of Health ScienceLinkoping UniversityLinkopingSweden Department of Molecular and Clinical Medicine Division of Infectious DiseasesUniversity HospitalLinkopingSweden

Hepatocyte growth factor (HGF) is a renotropic, antifibrotic and regenerative factor with cytoprotective effects that is produced by mesenchymal cells and shows high affinity to components of extra cellular matrix, such as heparan sulphate proteoglycan (HS-PG), in healthy. Patients with chronic renal failure (CRF) suffer from a chronic inflammatory disorder. In order to assess the underlying mechanisms for development of CRF we aimed to assess the amounts and affinity of HGF in this patient group. Elisa, western blot and surface plasmon resonance (SPR) were used to study HGF in blood samples, as well as in isolated neutrophils, in CRF patients compared to healthy controls. Patients with CRF showed higher HGF levels in serum (P P < 0.0001), compared to healthy controls. Addition of protease inhibitors decreased the difference between patients with CRF compared to healthy individuals. HGF with potent regenerative function during injury lacks affinity to HSPG in patients with CRF that may depend on production of proteases from activated immune cells. This information might be used to highlight underlying mechanisms for chronicity and leading to new strategies for treatment of chronic injuries.

关键词： Chronic Renal Failure Hepatocyte Growth Factor Biological Activity Neutrophils

Comparing Chinese Financial Markets Behavior to the Geometric Brownian Motion Process

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Comparing Chinese Financial Markets Behavior to the Geometri...

作者：费萨尔（faisal shahzad）山东大学

学位级别：硕士

This study examines the behavior of the Chinese financial markets with regards to the Geometric Brownian motion *** uses the daily,weekly and monthly stock prices trading in the Chinese securities exchanges,all the more particularly the CNY/US$,SSE Composite Index,ICBC,CITIC Securities Co.,*** Component Index,Petro China,and Bank Of China..The assumptions underlying the Geometric Brownian motion in finance,namely the stationarity,the normality and the independence of stock returns,are tested using both graphical（histograms and normal plots）and statistical test（Kolmogorov-Simirnov test,Box-Ljung statistic and Augmented Dickey-Fuller test）methods to check whether or not the Brownian motion as a model for Chinese financial markets *** Hurst exponent or independence index is also applied to support the results from the previous ***,the independent or Geometric Brownian motion time series should be characterized by the Hurst exponent of 1/2.A value of a Hurst exponent different from that would indicate the presence of long memory or fractional Brownian motion in a time *** study shows that at least one assumption is violated when the Geometric Brownian motion process is examined,assumption by *** also reveals the presence of both long memory and random walk or Geometric Brownian motion in the Chinese financial markets returns when the Hurst index analysis is used and finds that the Currency market is the most efficient of the Chinese financial *** study concludes that although some assumptions underlying the process are violated,the Brownian motion as a model in Chinese financial markets cannot be *** can be accepted in some instances if some parameters such as the Hurst exponent are added.

关键词：金融市场几何布朗运动过程 Hurst指数

Improving Queuing System Throughput Using Distributed Mean Value Analysis to Control Network Congestion

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Communications and Network 2015年第1期7卷 21-29页

作者： faisal shahzad Muhammad Faheem Mushtaq Saleem Ullah M. Abubakar Siddique shahzada Khurram Najia Saher Department of Computer Science & IT The Islamia University of Bahawalpur Bahawalpur Pakistan College of Computer Science Chongqing University Chongqing China

In this paper, we have used the distributed mean value analysis (DMVA) technique with the help of random observe property (ROP) and palm probabilities to improve the network queuing system throughput. In such networks, where finding the complete communication path from source to destination, especially when these nodes are not in the same region while sending data between two nodes. So, an algorithm is developed for single and multi-server centers which give more interesting and successful results. The network is designed by a closed queuing network model and we will use mean value analysis to determine the network throughput (b) for its different values. For certain chosen values of parameters involved in this model, we found that the maximum network throughput for β≥0.7?remains consistent in a single server case, while in multi-server case for β≥ 0.5?throughput surpass the Marko chain queuing system.

关键词： Network Congestion Throughput Queuing System Distributed Mean Value Analysis

Differential elastic scattering cross sections of protons from Al in 2.4–4.8 MeV energy range

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Nuclear Science and Techniques 2016年第2期27卷 97-100页

作者： Kashif shahzad faisal J. Qureshi Javeria Taj Ali Awais Javaid Hussain Waheed Akram Shehla Honey Ishaq Ahmad Maaza Malik National Center for Physics Quaid-i-Azam UniversityIslamabad 44000 Pakistan UNESCO-UNISA Africa Chair in Nanosciences/ Nanotechnology College of Graduate Studies University of South Africa Muckleneuk Ridge PO Box 392 Pretoria South Africa Nanosciences African Network (NANOAFNET) iThemba LABS-National Research Foundation 1 Old Faure Road Somerset West 7129 PO Box 722 Somerset West Western Cape Province South Africa

Measurement of differential elastic cross section of protons from aluminum was taken at 165° degree in the2.4–4.8 Me V energy range. The results and measured energy resonances were compared with reported *** data wi... 详细信息

关键词：能量范围微分截面弹性散射质子电子铝能量共振后向散射