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Shahab, Muhammad Basit,Usman, Muhammad Arslan,Shin, Soo Young IEEE 2017 IEEE communications letters Vol.21 No.2
<P>This letter proposes a novel algorithm named bandwidth adaptation by squeezing idle traffic (BASIT), which aims at reducing the video traffic in idle tabs/windows of browsers. The algorithm is based on detecting active tabs/windows in the browsers at client end. Video data on idle tabs are intelligently compressed by the server to save network bandwidth. Bandwidth wasted on idle video traffic is reduced by either sending the lowest quality of the video or only audio throughout the idle duration of the tabs/windows. It is understandable that substantial amount of bandwidth can be saved by applying BASIT algorithm on browsers.</P>
Investigation of single bubble behavior under rolling motions using multiphase MPS method on GPU
Basit, Muhammad Abdul,Tian, Wenxi,Chen, Ronghua,Basit, Romana,Qiu, Suizheng,Su, Guanghui Korean Nuclear Society 2021 Nuclear Engineering and Technology Vol.53 No.6
Study of single bubble behavior under rolling motions can prove useful for fundamental understanding of flow field inside the modern small modular nuclear reactors. The objective of the present study is to simulate the influence of rolling conditions on single rising bubble in a liquid using multiphase Moving Particle Semi-implicit (MPS) method. Rolling force term was added to 2D Navier-Stokes equations and a computer program was written using C language employing OpenACC to port the code to GPU. Computational results obtained were found to be in good agreement with the results available in literature. The impact of rolling parameters on trajectory and velocity of the rising bubble has been studied. It has been found that bubble rise velocity increases with rolling amplitude due to modification of flow field around the bubble. It has also been concluded that the oscillations of free surface, caused by rolling, influence the bubble trajectory. Furthermore, it has been discovered that smaller vessel width reduces the impact of rolling motions on the rising bubble. The effect of liquid viscosity on bubble rising under rolling was also investigated and it was found that effects of rolling became more pronounced with the increase of liquid viscosity.
Analysis of Coupling Effect in Holey Fiber
Abdul Basit,Engr Faizullah,Basit Hassan 제어로봇시스템학회 2008 제어로봇시스템학회 국제학술대회 논문집 Vol.2008 No.10
This paper describes the analysis of coupling effect in Holey Fiber (HF), a recent innovation in the field of optical wave guiding. HF is an all-silica optical fiber with a solid core surrounded by an array of air holes that provide a low-index cladding. The strong guidance of HF and the numerous degrees of freedom available in design give rise to novel properties, including the capability of single mode behavior over an unprecedented range of wavelengths, and anomalous dispersion below 1.27 μm. The Finite Difference Time Domain (FDTD) method was used to develop a new model for the study of Holey Fiber (HF). Results obtained from this model correlated well with existing experimental and analytic results. The model was applied to analyze coupling effects in HF.
Singel Agent DAA in HCV PCR Positive Liver Transplant Patients, Experience from a Developing Country
( Hafiz Abdul Basit Siddiqui ),( Basit Siddiqui ),( Rabeea Azmat ),( Wasim Jafri ) 대한간학회 2018 춘·추계 학술대회 (KASL) Vol.2018 No.1
Aims: Chronic hepatitis C (CHC) is the leading cause of decompensated liver disease and liver transplant indication in Pakistan, which is the second most prevalent country with a prevalence of 3.5% to 5.2%. Being the seventh most populous country in the world, lacking significantly on medical grounds reflected by only one liver transplant centre for more than 10 million chronically affected liver disease patients. Before the era of directly acting antiviral agents (DAAs) most common problem faced in the post liver transplant period was recurrence of HCV and most of the patients were non responders to interferon therapy well before transplantation of liver graft. Aim of this study is to see the outcomes of single agent DAA in HCV PCR positive liver transplant patients. Methods: This cross sectional analysis was carried out in CHC infected post liver transplant patients with high viremia. The effect of DAAs were noted in the form of eradication of virus and achievement of sustained virological response (SVR). DAAs used, were also recored. Also to note the interaction with immunosuppresants and development of side effects notably derangement of liver function test or failure of graft and anemia. And to note the development of acute kidney injury or any other untoward effect. Results: During study period of 24 months, from January 2015 to December 2016, 51 HCV positive liver transplant patients were enrolled in the study. 26 (52%) out of 51 found to have active viral replication with positive PCR. All 26 received combination of Sofosbuvir (only DAA avaialbe till December 2016 in Pakistan) and Ribavirin. Achievement of viral eradication was 100% so was for SVR. There was no interaction with immunosuppressants. Most commonly reported side effect was fatigue and a feeling of nausea. Kidney and liver function tests remained normal. Contrary to recent data, there was no recurrence of hepatocellular carcinoma (HCC) in patients who recieved liver graft for HCC on background of CHC cirrhosis. Conclusions: Directly acting antiviral therapy has revolutionized outcomes of HCV infected post liver transplant patients in a country lacking modern and advanced health care system. Even the single agent therapy has done wonders for the economically less privileged.
Basit, S.,Ashraf, Z.,Lee, K.,Latif, M. S.E.C.T. [etc.] ; Elsevier Science Ltd 2017 European journal of medicinal chemistry Vol.134 No.-
Non-small cell lung cancers (NSCLC) harboring anaplastic lymphoma kinase (ALK) gene rearrangements invariably develop resistance to 2<SUP>nd</SUP>-generation ALK inhibitors. Lorlatinib (PF-06463922) (6) is a 3<SUP>rd</SUP>-generation macrocyclic ALK-TKI that demonstrates many advantages over 2<SUP>nd</SUP>-generation ALK inhibitors. Lorlatinib has demonstrated decent kinase selectivity, promising pharmacokinetic profile, selective brain-penetration and strong antiproliferative activity in several ALK/ROS1-driven tumor models. The current review describes the activity spectrum, key events from discovery to clinical applications and the evidences that lorlatinib acts as an ALK/ROS1 inhibitor in clinical settings.
Basit, Muhammad Abdul,Abbas, Muhammad Awais,Jung, Eun Sun,Ali, Ijaz,Kim, Dae Woong,Bang, Jin Ho,Joo Park, Tae Elsevier 2018 Materials chemistry and physics Vol.220 No.-
<P><B>Abstract</B></P> <P>Ultrathin and conformal ZnS film grown by atomic layer deposition was employed in quantum dot-sensitized solar cells (QDSSCs) as an interfacial layer (IL) between mesoporous TiO<SUB>2</SUB> photoanode and successive ionic layer adsorption and reaction (SILAR)-grown PbS QDs. ZnS IL provided more nucleation sites compared to a bare TiO<SUB>2</SUB> photoanode, which enhanced PbS QDs loading remarkably. As a result, the optical absorbance and thus photocurrent density considerably increased. The power conversion efficiency of QDSSCs increased from 3.4% to 4% by introducing the ZnS IL. However, the <I>β</I>-recombination model obtained from electrochemical impedance spectroscopy revealed the evolution of charge carrier recombination inside QDs as a consequence of enhanced QD loading, which partly dilutes this benefit.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Ultrathin and conformal ZnS interfacial layer (IL) was grown on mesoporous TiO<SUB>2</SUB> photoanode by atomic layer deposition. </LI> <LI> ZnS IL provided more nucleation sites for PbS QDs deposition using SILAR. </LI> <LI> Light absorbance, photocurrent density and power conversion efficiency of QDSSCs were increased by adoption of ZnS IL. </LI> </UL> </P>
Basit, Muhammad Abdul,Abbas, Muhammad Awais,Bang, Jin Ho,Park, Tae Joo Elsevier 2015 JOURNAL OF ALLOYS AND COMPOUNDS Vol.653 No.-
<P><B>Abstract</B></P> <P>In<SUB>2</SUB>S<SUB>3</SUB> interfacial recombination barrier layer (IBL) via successive ionic layer adsorption and reaction (SILAR) was successfully employed between PbS quantum dots and mesoporous TiO<SUB>2</SUB> in quantum-dot-sensitized solar cells (QDSSCs). In<SUB>2</SUB>S<SUB>3</SUB> IBL significantly increased the resistance against back electron transfer from TiO<SUB>2</SUB>, resulting an increment in the photocurrent density (<I>J</I> <SUB> <I>SC</I> </SUB>) for the cell with single SILAR cycle of In<SUB>2</SUB>S<SUB>3</SUB> IBL. Further increase in the number of SILAR cycles of In<SUB>2</SUB>S<SUB>3</SUB> IBL deteriorated the <I>J</I> <SUB> <I>SC</I> </SUB>, whereas open-circuit voltage sustained the increasing trend. Therefore, an optimal photo-conversion efficiency of ∼2.2% was obtained for the cell with 2 SILAR cycles of In<SUB>2</SUB>S<SUB>3</SUB> IBL, which strategically reached a value of ∼2.70% after annealing (increased by 40% compared to the control cell without IBL). In<SUB>2</SUB>S<SUB>3</SUB> IBL not only improved the recombination resistance and electron life time of the cells, but it also enhanced the photostability of the cells.</P> <P><B>Highlights</B></P> <P> <UL> <LI> In<SUB>2</SUB>S<SUB>3</SUB> interfacial recombination barrier layer was deposited on TiO<SUB>2</SUB> photoanode via SILAR process. </LI> <LI> Resistance against back electron transfer from TiO<SUB>2</SUB> (recombination) increased notably. </LI> <LI> Fabricated PbS-QDSSCs were characterized using IPCE, OCVD and EIS techniques. </LI> <LI> In<SUB>2</SUB>S<SUB>3</SUB> IBL improved chemical capacitance, electron life time and photostability of modified cells. </LI> <LI> 2In<SUB>2</SUB>S<SUB>3</SUB> IBL showed optimal performance, yielding 40% improvement in PCE after heat treatment. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>
Basit Raza Fazal,Sungmo Moon 한국표면공학회 2017 한국표면공학회지 Vol.50 No.3
This research was conducted to investigate the electrochemical properties of the thin air-formed oxide filmcovered AZ31 Mg alloy. Native air-formed oxide films on AZ31 Mg alloy samples were prepared by knifeabrading method and the changes in the electrochemical properties of the air-formed oxide film were investigated in seven different electrolytes containing the following anions Cl<SUP>-</SUP>, F<SUP>-</SUP>, SO4<SUP>2-</SUP>, NO3<SUP>-</SUP>, CH3COO<SUP>-</SUP>, CO3<SUP>2-</SUP>, and PO4<SUP>3-</SUP>. It was observed from open circuit potential (OCP) transients that the potential initially decreased before gradually increasing again in the solutions containing only CO3<SUP>2-</SUP> or PO4<SUP>3-</SUP> ions, indicating the dissolution or transformation of the native air-formed oxide film into new more protective surface films. The Nyquist plots obtained from electrochemical impedance spectroscopy (EIS) showed that there was growth of new surface films with immersion time on the air-formed oxide film-covered specimens in all the electrolyte. The least resistive surface films were formed in fluoride and sulphate baths whereas the most protective film was formed in phosphate bath. The potentiodynamic polarization curves illustrated that passive behaviour of AZ31 Mg alloy under anodic polarization appears only in CO3<SUP>2-</SUP>, or PO4<SUP>3-</SUP> ions containing solutions and at more than -0.4 VAg/AgCl in F<SUP>-</SUP> ion containing solution.
Basit Raza Fazal,Sungmo Moon 한국표면공학회 2016 한국표면공학회지 Vol.49 No.5
This article reports improved corrosion resistance and adhesion of electro-paint (E-paint) with fluoride conversion coating (FCC) on AZ31 Mg alloy for the first time. These improvements were observed in comparison to chemically polished samples with no chemical conversion coating and samples with cerium conversion coatings (CeCC). FCCs were prepared in a hydrofluoric acid (HF) solution for four different times; 10, 30, 60, and 120 s. The colour of the samples changed from light gold to brown with increasing immersion time, indicating the formation of thicker FCC coatings with increasing immersion time. The adhesion of the E-paint on FCC-coated AZ31 Mg alloy was tested after 500 h of immersion in deionized (DI) water. Salt spray test (SST) results revealed delamination of E-paint on the chemically polished sample, severe blistering on the samples with CeCC, but no delamination and no blistering on the samples with FCC.