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Multidimensional Model for Vulnerability Assessment of Urban Flooding: An Empirical Study in Pakistan

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International Journal of Disaster Risk Science 2018年第3期9卷 359-375页

作者： irfan Ahmad Rana Jayant K.Routray Department of Urban and Regional Planning (URP) School of Civil and Environmental Engineering (SCEE) National University of Sciences and Technology (NUST) Regional and Rural Development Planning (RRDP) and Disaster Preparedness Mitigation and Management (DPMM) Department of Development and SustainabilityAsian Institute of Technology

Urban flooding has become a regular phenomenon in many towns and cities in the Asia Pacific region over the past years. Professionals associated with disaster management and climate change are at the forefront of addressing urban flooding. To reduce flood risks,vulnerability and its components must be *** assessment methods are diverse and complex, with a varied nature of understanding the key terms used in various contexts, and this diversity ultimately reflects on the interpretation of results in research *** interpretations and definitions exist in the disaster risk and climate change literature, complicating the process of astute and comprehensive vulnerability assessment. The main purpose of this study was to quantify vulnerability indicators and develop a multidimensional model for vulnerability assessment. Vulnerability is explored through the lens of five dimensions: social, economic, physical/infrastructural, institutional, and attitudinal. This methodology is applied to urban flooding in Pakistan, to verify the proposed model. Three study sites in urban areas with different population sizes, situated in high-risk flood zones in the Punjab Province of Pakistan were selected for empirical investigation. A household survey was conducted, and indices were developed for each dimension based on welldefined indicators. The proposed methodology for vulnerability assessment was tested and found operational. This method can be replicated irrespective of spatial scales and can be modified for other disasters by streamlining hazard specific indicators.

关键词： Pakistan Punjab Urban flooding Vulnerability assessment

Enhanced photocatalytic hydrogen generation of mesoporous rutile TiO_2 single crystal with wholly exposed {111} facets

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Chinese Journal of Catalysis 2015年第12期36卷 2103-2108页

作者：吴亭亭康向东 mohammad W.Kadi iqbal Ismail 刘岗成会明中国科学院金属研究所沈阳材料科学国家(联合)实验室辽宁沈阳110016 阿普杜勒阿齐兹国王大学理学院化学系

The development of semiconductor photocatalysts with highly reactive facets exposed has great potential to improve their photocatalytic reactivity. We report the synthesis of mesoporous rutile TiO 2 single crystals with tunable ratios of {110} and {111} facets through the seeded-template hydrothermal method. With increasing the amount of morphology controlling agent NaF,the facet ratio of {111} to {110} increases,and eventually the mesoporous rutile TiO 2 single crystals with wholly exposed {111} reactive facets are obtained. The resultant faceted mesoporous single crystals exhibit a superior photocatalytic performance of hydrogen evolution to mesoporous single crystals with a large percentage of thermodynamically stable {110} facets,as well as the solid rutile single crystals. ？ 2015,Dalian Institute of Chemical Physics,Chinese Academy of Sciences.

关键词： Titania Photocatalyst Mesoporous Single-crystal Hydrogen generation

Facile synthesis of ironenickelecobalt ternary oxide(FNCO)mesoporous nanowires as electrode material for supercapacitor application

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Journal of Materiomics 2022年第1期8卷 221-228页

作者： Muhammad Usman Muhammad Tayyab Ahsan Sofia Javed Zeeshan Ali Yiqiang Zhan irfan Ahmed Sajid Butt mohammad Islam Asif Mahmood M.Aftab Akram School of Chemical and Materials Engineering National University of Sciences and Technology(NUST)Sector H-12Islamabad44000Pakistan Department of Materials Science and Engineering College of EngineeringPeking University100871BeijingChina State Key Laboratory of ASIC and System Center of Micro-Nano SystemSISTFudan UniversityShanghai200433China Department of Materials Science and Engineering Institute of Space TechnologyIslamabad44000Pakistan New Mexcico Institute of Mining&Technology SocorroNM 87801USA School of Chemical and Biomolecular Engineering The University of Sydney2006SydneyAustralia

Transition Metal Oxides have drawn significant attention due to their reversible chemical redox reaction and long-life *** agglomeration and shrinkage/expansion of transition metal oxides in the nanosize regime have a noticeable effect on their electrochemical *** in this work,mesoporous nanowires(NWs)with a typical composition of iron-nickel-cobalt ternary oxide(FNCO)are synthesized using a simple,facile and cost-effective hydrothermal process followed by furnace *** NWs are then extensively investigated as an electrode material for supercapacitor *** compare the electrochemical properties,nanowires of nickel-cobalt oxide(NCO),iron-cobalt oxide(FCO)and cobalt oxide(CO)were also produced by following the same *** FNCO NWs are found to overcome the shortcomings in the electrochemical energy storage devices by exhibiting higher values of specific capacitance(2197 Fg^(-1))and energy density(109 Whkg^(-1))at 1 Ag^(-1) current ***,the FNCO NWs also showed a cyclic charge/discharge stability of 96%even up to 20,000 ***,a FNCO//graphene asymmetric device,fabricated with FNCO NWs and graphene as positive and negative electrodes,respectively,which exhibit high energy density(47 Whkg^(-1)),power density(375 Wkg^(-1))and excellent capacitance retention(86%)after 15,000 cycles.

关键词： Electrochemistry Hydrothermal synthesis Nanowires Supercapacitor Transition metal oxides

Bioresorbable magnesium-based alloys containing strontium doped nanohydroxyapatite promotes bone healing in critical sized bone defect in rat femur shaft

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Journal of Magnesium and Alloys 2023年第1期11卷 270-286页

作者： Shazia Shaikh irfan Qayoom R.Sarvesha Ashok Kumar Department of Biological Sciences and Bioengineering Indian Institute of Technology KanpurKanpur 208016India Centre for Environmental Science and Engineering Indian Institute of Technology KanpurKanpur 208016India Department of Materials Science and Engineering Indian Institute of Technology KanpurKanpur 208016India Center for Nanosciences Indian Institute of Technology KanpurKanpur 208016India The Mehta Family Centre for Engineering in Medicine Indian Institute of Technology KanpurKanpur 208016India

Magnesium-based biomaterials have been in extensive research for orthopedic applications for decades due to their optimal mechanical features and osteopromotive nature;nevertheless,rapid degradation restricts their clinical *** this study,pristine magnesium was purified(P-Mg)using a melt self-purification approach and reinforced using indigenously synthesized nanohydroxyapatite(HAP,0.6 wt.%)and strontium substituted nanohydroxyapatite(SrHAP,0.6 wt.%)using a low-cost stir assisted squeeze casting method to control their degradation *** electron back-scattered diffraction(EBSD)and X-ray diffraction(XRD)examinations,all casted materials were carefully evaluated for microstructure and phase *** characteristics,in vitro degradation,and in vitro biocompatibility with murine pre-osteoblasts were also tested on the fabricated *** in vivo examination of bone formation,osteointegration,and degradation rate,the magnesium-based alloys were fabricated as small cylindrical pins with a diameter of 2.7 mm and a height of 2 *** pins were implanted in a critical-sized defect in a rat femur shaft(2.7 mm diameter and 2 mm depth)for 8 weeks and evaluated by microCT and histological evaluation for bone growth and *** compared to P-Mg and P-MgHAP,micro-CT and histological analyses revealed that the P-MgSrHAP group had the highest bone formation towards the periphery of the implant and hence maximum *** the removed pins from the bone defect were analyzed using GIXRD,they displayed hydroxyapatite peaks that were consistent with *** P-Mg,P-MgHAP,and P-MgSrHAP 8 weeks after implantation,in vivo degradation rates derived from micro-CT were around 0.6 mm/year,0.5 mm/year,and 0.1 mm/year,***,P-MgSrHAP possesses the requisite degradation rate as well as sufficient mechanical and biological properties,indicating that it has the potential to be used in the development/fabrication of bi

关键词： Magnesium purification Reinforcement Degradation rate Nanocement Bone regeneration

Stabilizing silica nanoparticles in high saline water by using polyvinylpyrrolidone for reduction of asphaltene precipitation damage under dynamic condition

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Chinese Journal of Chemical Engineering 2019年第5期27卷 1021-1029页

作者： mohammad Reza Aghajanzadeh mohammad Sharifi Department of Petroleum Engineering Amirkabir University of Technology

In this study, the performance of stable nanofluid containing SiO2 nanoparticles dispersed and stabilized in high salinity brine for asphaltene inhibition in dynamic condition is evaluated. In the first stage of this work, the stability of silica nanoparticles in different range of water salinity(0–100000 mg·L-1) is investigated. Next, stable nanofluid containing highest salinity is selected as asphaltene inhibitor agent to inject into the damaged core sample. The estimated values of oil recovery for base case, after damage process and after inhibition of asphaltene precipitation using nanofluid are 51.6%, 36.1% and 46.7%, respectively. The results showed the reduction in core damage after using nanofluid. In addition, the relative permeability curves are plotted for the base case, after damage process and also after inhibition of asphaltene precipitation using nanofluid. Comparison of relative permeability curves shows, relative permeability of oil phase decreased after damage process as compared with the base case. But after using nanofluid the oil relative permeability curve has shifted to the right and effective permeability of oil phase has been improved.

关键词： Formation damage Enhanced oil recovery Salinity Asphaltene Core flooding Nano particles

Nonlinear analysis of cable structures using the dynamic relaxation method

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Frontiers of Structural and Civil Engineering 2021年第1期15卷 253-274页

作者： mohammad REZAIEE-PAJAND mohammad mohammadI-KHATAMI Department of Civil Engineering Ferdowsi University of MashhadMashhad ***Iran

The analysis of cable structures is one of the most challenging problems for civil and mechanical *** they have highly nonlinear behavior,it is difficult to find solutions to these *** far,different assumptions and methods have been proposed to solve such *** dynamic relaxation method(DRM)is an explicit procedure for analyzing these types of *** utilize this scheme,investigators have suggested various stiffness matrices for a cable *** this study,the efficiency and suitability of six well-known proposed matrices are assessed using the *** achieve this goal,16 numerical examples and two criteria,namely,the number of iterations and the analysis time,are *** on a comprehensive comparison,the methods are ranked according to the two *** numerical findings clearly reveal the best ***,a variety of benchmark problems are suggested by the authors for future studies of cable structures.

关键词： nonlinear analysis cable structure stiffness matrix dynamic relaxation method

Zika virus infections:an overview of current scenario

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Asian Pacific Journal of Tropical Medicine 2016年第7期9卷 601-605页

作者： Javid iqbal Dasti Department of Microbiology Qauid-i-Azam University

Zika virus(ZIKV) was discovered more than half a century ago,recently it has gained unprecedented attention by the global health *** 2007,only 14 cases of human ZIKV infections were reported around the globe,while during the current outbreak,estimated cases mounted to approximately 1.5 million in Brazil alone,the virus was disseminated to wider South-American territories and travel-associated ZIKV infections were reported in USA,Europe and recently in *** infections remain asymptomatic in approximately 80% of the individuals,and no anti-viral treatments were ***,neurological complications associated with the infections,such as infant microcephaly and Guillain-Barré syndrome are major cause of the ***,based on small numbers of cases,existing evidence strongly supports an exclusive link of viral infection and observed neurological ***,much work remains to assign exact numbers of complications caused by *** its structural attributes ZIKV shows remarkable resemblance with dengue virus and West-Nile ***,genomes of different ZIKV strains have already been decoded;role of the viral components in infection process and particularly pathogenesis of the disease remain widely *** vulnerable areas,most viable strategy to ensure public health safety is vector control and enhanced public awareness about the transmission of the disease.

关键词： Zika virus Neurological complications microcephaly Guillain-Barré syndrome Aedes aegypti Aedes albopictus

DEM Numerical Simulation of Abrasive Wear Characteristics of a Bioinspired Ridged Surface

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Journal of Bionic Engineering 2010年第2期7卷 175-181页

作者： mohammad Almagzoub mohammad Carlo Menon Key Laboratory of Bionic Engineering Jilin University College of Biological and Agricultural Engineering Jilin University MENRVA Group Simon Fraser University

This paper presents numerical investigations into a ridged surface whose design is inspired by the geometry of a Farrer’*** objective of the performed research is to assess if the proposed Bioinspired Ridged Surface (BRS) can potentiallyimprove wear resistance of soil-engaging components used in agricultural machinery and to validate numerical simulationsperformed using software based on the Discrete Element Method (DEM).The wear performance of the BRS is experimentallydetermined and also compared with a conventional flat *** size of soil particles and relative velocities between theabrasive sand and the testing surfaces are *** results show that the numerical simulations are in agreement withthe experimental results and support the hypothesis that abrasive wear is greatly reduced by substituting a conventional flatsurface with the BRS.

关键词： bioinspired ridged surface abrasive wear numerical simulation Discrete Element Method (DEM)

Comparative studies of some prominent her cultivars for their qualitative characters ( Ziziphus jujuba L.)

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浙江大学学报(农业与生命科学版) 1991年第2期 98-102页

作者： Javaid iqbal,Favuir mohammad,Yusuf Ali,Tauqir Abbas,Arif Salcem Arif Asst. Res. Officer Ayuh Agricultural Research Institute Faisalabad Pakistani. Lecturer Department of Horticulture Univ. of Agri. Faisalabad Pakistan. Assistant Professor Horticulture Deptt. University College of Agriculture Rawalakot Azad Kashmir. Pakistan. Asst. Res. Officer Postharvest Centre AARI Faisalabad Pakistan. Lecturer in Chemistry Govt College of Science Fatsalabad Pakistan

Various ber cultivars differ grearly from each other-with regard to physio-chemical characteristics,some are superior for one character while others are best for another *** No.9 showed largest fruit size,maximum fruit weight and best keeping *** variety was also found best for better seed/pulp *** variety Khathi mithi was found best for organoleptic values and non reducing *** variety was found superior to other varieties when evaluated for total soluble solid,acidity,ascorbic acid and reducing sugars.

关键词： Ziziphus jujuba L Comparative studies of some prominent her cultivars for their qualitative characters