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Assessment of Sea Water Inundation Along Daboo Creek Area in Indus Delta Region, Pakistan

Journal of Ocean University of China 2017年第6期16卷 1055-1060页

作者： ZIA Ibrahim zafar hina SHAHZAD Muhammad I. MERAJ Mohsin KAZMI Jamil H. National Institute of Oceanography (NIO) Karachi 75600 Pakistan Department of Geography University of Karachi 75270 Pakistan Earth & Atmospheric Remote Sensing Laboratory (EARL) Department of Meteorology COMSATS Institute of Information Technology (CIIT) Park Road Islamabad 45550 Pakistan

Indus Deltaic Region(IDR) in Pakistan is an erosion vulnerable coast due to the high deep water wave energy. Livelihood of millions of people depends on the fisheries and mangrove forests in IDR. IDR consists of many creeks where Daboo is a major creek located at southeast of the largest city of Pakistan, Karachi. Unfortunately, there has been no detailed study to analyze the damages of sea water intrusion at a large temporal and spatial scale. Therefore, this study is designed to estimate the effects of sea water inundation based on changing sea water surface salinity and sea surface temperature(SST). Sea surface salinity and SST data from two different surveys in Daboo creek during 1986 and 2010 are analyzed to estimate the damages and extent of sea water intrusion. Mean salinity has increased 33.33% whereas mean SST decreased 13.79% from 1987 to 2010. Spatio-temporal analysis of creek area using LANDSAT 5 Thematic mapper(TM) data for the years 1987 and 2010 shows significant amount of erosion at macro scale. Creek area has increased approximately 9.93%(260.86 m^2 per year) which is roughly equal to 60 extensive sized shrimp farms. Further Land Use Land Cover(LULC) analyses for years 2001 and 2014 using LANDSAT 7 Enhanced Thematic Mapper Plus(ETM+) has indicated 42.3% decrease in cultivated land. Wet mud flats have spread out at the inner mouth of creek with enormous increase of 123.3%. Significant sea water intrusion has increased the area of barren land by 37.9%. This also resulted in overall decrease of 6.7% in area covered by mangroves. Therefore, this study recorded a significant evidence of sea water intrusion in IDR that has caused serious damages to community living in the area, economical losses. Additionally, it has also changed the environment by reducing creek biological productivity as reported by earlier studies over other regions of the world.

关键词： sea water intrusion SST salinity Ambro creek CTD

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Relative Time Quantum-based Enhancements in Round Robin Scheduling

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Computer Systems Science & Engineering 2022年第5期41卷 461-477页

作者： Sardar zafar Iqbal hina Gull Saqib Saeed Madeeha Saqib Mohammed Alqahtani Yasser A.Bamarouf Gomathi Krishna May Issa Aldossary Department of Computer Information Systems College of Computer Science and Information TechnologyImam Abdulrahman Bin Faisal UniversityP.O.Box No.1982DammamSaudi Arabia

Modern human life is heavily dependent on computing systems and one of the core components affecting the performance of these systems is underlying operating *** systems need to be upgraded to match the needs of modern-day systems relying on Internet of Things,Fog computing and Mobile based *** scheduling algorithm of the operating system dictates that how the resources will be allocated to the processes and the Round Robin algorithm(RR)has been widely used for *** intent of this study is to ameliorate RR scheduling algorithm to optimize task *** have carried out an experimental study where we have developed four variations of RR,each algorithm considers three-time quanta and the performance of these variations was compared with the RR algorithm,and results highlighted that these variations performed better than conventional RR *** the future,we intend to develop an automated scheduler that can determine optimal algorithm based on the current set of processes and will allocate time quantum to the processes intelligently at the run *** way the task performance of modern-day systems can be improved to make them more efficient.

关键词： CPU scheduling Round Robin enhanced Round Robin relative time quantum operating systems

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Antibacterial Behavior of Laser-Ablated Copper Nanoparticles

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Acta Metallurgica Sinica(English Letters) 2016年第8期29卷 748-754页

作者： hina khalid shamaila shamaila nosheen zafar rehana sharif jawad nazir mohammad rafique sheeba ghani hussain saba Department of Physics University of Engineering and Technology Department of Microbiology University of Veterinary and Animal Sciences

Copper nanoparticles（Cu NPs） have been synthesized by using laser ablation method,using deionized water as main *** formation of Cu NPs is confirmed by UV-visible spectrophotometer（UV-Vis）,atomic force microscopy（AFM） and X-ray diffraction（XRD）.Cu NPs fabricated by laser ablation have diameter in the range from 14 to 55 *** analysis revealed the face-centered cubic（fcc） crystal structure of Cu *** antibacterial activity of Cu NPs has been evaluated in vitro against strains of Escherichia coli（***） and Staphylococcus aureus（***）.The fabricated Cu NPs show considerable antibacterial activity against both bacterial *** bacterial activity of Cu NPs was found to depend on the microbial species.

关键词： Laser-ablated nanoparticles UV-visible spectrophotometer Atomic force microscopy(AFM) Escherichia coli Staphylococcus aureus

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Antibacterial Action of Chemically Synthesized and Laser Generated Silver Nanoparticles against Human Pathogenic Bacteria

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Journal of Materials Science & Technology 2016年第8期32卷 721-728页

作者： Nosheen zafar Shahzadi Shamaila Jawad Nazir Rehana Sharif Muhammad Shahid Rafique Jalees Ul-Hasan Syeda Ammara hina Khalid Department of Physics University of Engineering and Technology Lahore 54890 Pakistan Department of Microbiology University of Veterinary and Animal Sciences Lahore Pakistan Department of Physics Forman Christian College A Charted University Lahore Pakistan

Silver nanoparticles in the range of 10-40 nm were synthesized chemically and by laser ablation, em- ployed for in vitro antibacterial action against human pathogenic bacterium. Their formation was evidenced by UV-visible spectrophotometer; particle size confirmed by atomic force microscopy, crystal structure determined by X-ray diffraction and chemical composition investigated by Fourier transform infrared spec- troscopy. The calculated MIC （minimum inhibitory concentration） of chemically synthesized nanoparticles with 30-40 nm in size are 2.8 μg/mL 4.37 μg/mL 13.5μg/mL and 2.81 p.g/mL for E. coil, S. aureus, B. subtillis and Salmonella, respectively. Whereas laser ablated nanoparticles exhibit MIC of 2.10 μg/mL 2.36 μg/ mL and 2.68 μg/mL for E. coli, S. aureus and Salmonella, respectively.

关键词： Chemically synthesized and laser ablated nanoparticles UV-visible spectrophotometer Gram negative and gram positive bacteria

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Insect resistance management in Bacillus thuringiensis cotton by MGPS(multiple genes pyramiding and silencing)

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Journal of Cotton Research 2020年第4期3卷 311-323页

作者： zafar Muhammad Mubashar RAZZAQ Abdul FAROOQ Muhammad Awais REHMAN Abdul FIRDOUS hina SHAKEEL Amir MO Huijuan REN Maozhi Institute of Cotton Research Chinese Academy of Agricultural SciencesAnyang 455000HenanChina Department of Plant Breeding and Genetics University of Agriculture FaisalabadFaisalabad 38000Pakistan Zhengzhou Research Base State Key Laboratory of Cotton BiologyZhengzhou UniversityZhengzhou 450000China Department of Plant Pathology University of Agriculture FaisalabadFaisalabadPakistan.

The introduction of Bacillus thuringiensis(Bt)cotton has reduced the burden of pests without harming the environment and human ***,the efficacy of Bt cotton has decreased due to field-evolved resistance in insect pests over *** this review,we have discussed various factors that facilitate the evolution of resistance in cotton ***,different strategies like pyramided cotton expressing two or more distinct Bt toxin genes,refuge strategy,releasing of sterile insects,and gene silencing by RNAi are being used to control insect *** cotton has shown resistance against different cotton *** multiple genes pyramiding and silencing(MGPS)approach has been proposed for the management of cotton *** genome information of cotton pests is necessary for the development of MGPS-based *** expression cassettes against various essential genes involved in defense,detoxification,digestion,and development of cotton pests will successfully obtain favorable agronomic characters for crop protection and *** MGPS involves the construction of transformable artificial chromosomes,that can express multiple distinct Bt toxins and RNAi to knockdown various essential target genes to control *** evolution of resistance in cotton pests will be delayed or blocked by the synergistic action of high dose of Bt toxins and RNAi as well as compliance of refuge requirement.

关键词： Bt cotton RNAi Multiple genes pyramiding and silencing(MGPS) Bt resistance

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