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Lack of sleep and its association with academic progress of undergraduate students of foundation university medical college, islamabad, Pakistan

writing, manuscript review Mahnoor Khalid; data collection, data analysis, manuscript writing, manuscript review Usman Ali; data analysis, manuscript writing, manuscript review Abdu Rehman Butt; data

A New Cross-By-Pass-Torus Architecture Based on CBP-Mesh and Torus Interconnection for On-Chip Communication

A Mesh topology is one of the most promising architecture due to its regular and simple structure for on-chip communication. Performance of mesh topology degraded greatly by increasing the network size due to small bisection width and large network diameter. In order to overcome this limitation, many researchers presented modified Mesh design by adding some extra links to improve ...

Existence of best proximity points for controlled proximal contraction

In this paper, we investigate the sufficient condition for the existence of best proximity points for non-self-multivalued mappings. Additionally, we discuss the stability theorem for such mappings. Our results improve and generalize some existing results on the topic in the literature, in particular, the results of Lim and of Abkar and Gabeleh.

Fixed point of α-ψ-contractive type mappings in uniform spaces

In this paper, we shall investigate the existence and uniqueness of a fixed point of α-ψ-contractive mappings in the context of uniform spaces. We shall also prove some common fixed point theorems by introducing the notion of α-admissible pairs. We shall construct some examples to support our novel results. MSC: 46T99, 47H10, 54H25.

-contractive multivalued mappings

In this paper, we introduce the notion of ( α , ψ , ξ ) -contractive multivalued mappings to generalize and extend the notion of α-ψ-contractive mappings to closed valued multifunctions. We investigate the existence of fixed points for such mappings. We also construct an example to show that our result is more general than the results of α-ψ-contractive closed valued ...

Hybrid generalized contractions

Sintunavarat and Kumam introduced the notion of hybrid generalized multi-valued contraction mapping and established a common fixed point theorem. We extend their result for four mappings and prove common coincidence and common fixed point theorem.

On -contractive multi-valued mappings

Fixed Point Theory and Applications On (α ∗, ψ )-contractive multi-valued mappings Muhammad Usman Ali 1 Tayyab Kamran 0 0 Department of Mathematics, Quaid-i-Azam University , Islamabad , Pakistan 1

Flow of generalized Burgers fluid between parallel walls induced by rectified sine pulses stress

This paper presents the unsteady magnetohydrodynamic (MHD) flow of a generalized Burgers’ fluid between two parallel side walls perpendicular to a plate. The plate applies a shear stress induced by rectified sine pulses to the fluid. The obtained solutions by means of the Laplace and Fourier cosine and sine transforms are presented as a sum of the corresponding Newtonian and ...


. Scholar Usman Ali, Ms. Scholar Usman Ilyas Meer, Ms. Scholar M. Mubashar Naseem, Ms. Scholar Faculty of Management and Administration Sciences (FMAS) University of Gujrat , Pakistan The study aimed to


. Scholar Usman Ali, Ms. Scholar Usman Ilyas Meer, Ms. Scholar M. Mubashar Naseem, Ms. Scholar Faculty of Management and Administration Sciences (FMAS) University of Gujrat , Pakistan The study aimed to

Regioselective synthesis of 2-(bromomethyl)-5-aryl-thiophene derivatives viapalladium (0) catalyzed suzuki cross-coupling reactions: as antithrombotic and haemolytically active molecules

Background It is seen that the regioselective functionalizations of halogenated heterocycles play an important role in the synthesis of several types of organic compounds. In this domain, the Suzuki-Miyaura reaction has emerged as a convenient way to build carbon-carbon bonds in synthesizing organic compounds. Some of the most important applications of these reactions can be seen ...

Chemical composition and Biological studies of Ficus benjamina

Background Current study has been designed to estimate the possible antioxidant, antimicrobial and hemolytic potential of Ficus benjamina different parts (leaves, stem and root). Results All examined extracts and fractions were significantly rich in antioxidants and exhibited potent antimicrobial activity. GC/MS analysis of essential oil identified four compounds in stem and eight ...

Impact of hydrogen concentrations on the impedance spectroscopic behavior of Pd-sensitized ZnO nanorods

ZnO nanorods were synthesized using a low-cost sol-gel spin coating technique. The synthesized nanorods were consisted of hexagonal phase having c-axis orientation. SEM images reflected perpendicular ZnO nanorods forming bridging network in some areas. The impact of different hydrogen concentrations on the Pd-sensitized ZnO nanorods was investigated using an impedance spectroscopy ...

Erratum to: Conflict of interest declaration

of interest Mark Oremus , Robert McKelvie, Pasqualina L. Santaguida, Usman Ali, Cynthia Balion, Stephen Hill, Judy A. Brown, Amy Bustamam, Nazmul Sohel , and Parminder Raina have no conflicts of

In-vitro model systems to study Hepatitis C Virus

Hepatitis C virus (HCV) is a major cause of chronic liver diseases including steatosis, cirrhosis and hepatocellular carcinoma. Currently, there is no vaccine available for prevention of HCV infection due to high degree of strain variation. The current treatment of care, Pegylated interferon α in combination with ribavirin is costly, has significant side effects and fails to cure ...

A Convenient Method for the Synthesis of (Prop-2-Ynyloxy)Benzene Derivatives via Reaction with Propargyl Bromide, Their Optimization, Scope and Biological Evaluation

A highly convenient method has been developed for the synthesis of (prop-2-ynyloxy) benzene and its derivatives. Differently substituted phenol and aniline derivatives were allowed to react with propargyl bromide in the presence of K2CO3 base and acetone as solvent. The compounds were synthesized in good yields (53–85%). Low cost, high yields and easy availability of compounds ...

Down-regulation of IRES containing 5'UTR of HCV genotype 3a using siRNAs

work. All authors read and approved final manuscript. Authors’ information Saba Khaliq (PhD Molecular Biology), Shah Jahan (PhD Molecular Biology), Asim Pervaiz (M.Phil Molecular Biology), Usman Ali

Post-transcriptional inhibition of hepatitis C virus replication through small interference RNA

Background Hepatitis C Virus (HCV) infection is a major health problem throughout world that causes acute and chronic infection which resulted in liver fibrosis, hepatocellular carcinoma and death. The only therapy currently available for HCV infection is the combination of pegylated interferon alpha (PEG-IFN α) and ribavirin. This therapy can effectively clear the virus infection ...

The effect of providing skilled birth attendance and emergency obstetric care in preventing stillbirths

developed the review parameters and secured support. Drs Yawar Yakoob, Mahrukh Ali and Usman Ali undertook the literature search, data extraction and analysis under the supervision of Professor Bhutta. Drs