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Herding behavior in Ramadan and financial crises: the case of the Pakistani stock market

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Financial Innovation 2018年第1期4卷 242-255页

作者： Imran Yousaf Shoaib ali Syed zulfiqar ali shah Management Sciences Capital University of Science and TechnologyIslamabadPakistan Air University School of Management Air UniversityIslamabadPakistan International Islamic University IslamabadPakistan.

This study examines herding behavior in the Pakistani Stock Market under different market conditions,focusing on the Ramadan effect and Crisis period by using data from 2004 to *** regression models of Christie and Huang(Financ Analysts J 51:31-37,1995)and Chang et al.,(J Bank Finance 24:1651-1679,2000)are used for herding *** based on daily stock data reveal that there is an absence of herding behavior during rising(up)and falling(down)market as well as during high and low volatility in *** herding behavior is detected during low trading volume *** analysis shows that herding existed during 2005,2006 and 2007,while it is not evident during rest of the ***,herding behavior is not detected during ***,during financial crisis of 2007-08,Pakistani Stock Market exhibits herding behavior due to higher uncertainty and information asymmetry.

关键词： Herding behavior Financial crisis Ramadan effect Stock markets

Fault Tolerant Suffix Trees

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Computers, Materials & Continua 2021年第1期66卷 157-164页

作者： Iftikhar Ahmad Syed zulfiqar ali shah Ambreen shahnaz Sadeeq Jan Salma Noor Wajeeha Khalil Fazal Qudus Khan Muhammad Iftikhar Khan Department of Computer Science and Information Technology University of Engineering and TechnologyPeshawar25120Pakistan Department of Computer Science Shaheed Benazir Bhutto Women UniversityPeshawar25000Pakistan Department of Information Technology FCITKing Abdulaziz UniversityJeddahSaudi Arabia Department of Electrical Engineering University of Engineering and TechnologyPeshawar25120Pakistan

Classical algorithms and data structures assume that the underlying memory is reliable,and the data remain safe during or after ***,the assumption is perilous as several studies have shown that large and inexpensive memories are vulnerable to bit ***,the correctness of output of a classical algorithm can be threatened by a few memory *** tolerant data structures and resilient algorithms are developed to tolerate a limited number of faults and provide a correct output based on the uncorrupted part of the *** tree is one of the important data structures that has widespread applications including substring search,super string problem and data *** fault tolerant version of the suffix tree presented in the literature uses complex techniques of encodable and decodable error-correcting codes,blocked data structures and fault-resistant *** this work,we use the natural approach of data replication to develop a fault tolerant suffix tree based on the faulty memory random access machine *** proposed data structure stores copies of the indices to sustain memory faults injected by an *** develop a resilient version of the Ukkonen’s algorithm for constructing the fault tolerant suffix tree and derive an upper bound on the number of corrupt suffixes.

关键词： Resilient data structures fault tolerant data structures suffix tree

Immunity-and-matrix-regulatory cells enhance cartilage regeneration for meniscus injuries: a phase I dose-escalation trial

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Signal Transduction and Targeted Therapy 2023年第12期8卷 5873-5886页

作者： Liangjiang Huang Song Zhang Jun Wu Baojie Guo Tingting Gao Sayed zulfiqar ali shah Bo Huang Yajie Li Bo Zhu Jiaqi Fan Liu Wang Yani Xiao Wenjing Liu Yao Tian Zhengyu Fang Yingying Lv Lingfeng Xie Sheng Yao Gaotan Ke Xiaolin Huang Ying Huang Yujuan Li Yi Jia Zhongwen Li Guihai Feng Yan Huo Wei Li Qi Zhou Jie Hao Baoyang Hu Hong Chen Department of Rehabilitation Tongji HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhanChina National Stem Cell Resource Center State Key Laboratory of Stem Cell and Reproductive BiologyInstitute of ZoologyInstitute for Stem Cell and RegenerationChinese Academy of SciencesBeijingChina Beijing Institute for Stem Cell and Regenerative Medicine BeijingChina Department of Radiology Tongji HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhanChina Stem Cell Research Center Tongji HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhanChina Department of Orthopedics Tongji HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhanChina University of Chinese Academy of Sciences BeijingChina Beijing Key Lab for Pre-clinical Safety Evaluation of Drugs National Center for Safety Evaluation of DrugsNational Institutes for Food and Drug ControlBeijingChina Beijing Zephyrm Biotechnologies Co. Ltd.BeijingChina

Immunity-and-matrix-regulatory cells(IMRCs)derived from human embryonic stem cells have unique abilities in modulating immunity and regulating the extracellular matrix,which could be mass-produced with stable biological *** resemblance to mesenchymal stem cells(MSCs)in terms of self-renew and tri-lineage differentiation,the ability of IMRCs to repair the meniscus and the underlying mechanism remains ***,we showed that IMRCs demonstrated stronger immunomodulatory and pro-regenerative potential than umbilical cord MSCs when stimulated by synovial fluid from patients with meniscus *** injection into the knees of rabbits with meniscal injury,IMRCs enhanced endogenous fibrocartilage *** the dose-escalating phase I clinical trial(NCT03839238)with eighteen patients recruited,we found that intra-articular IMRCs injection in patients was safe over 12 months ***,the effective results of magnetic resonance imaging(MRI)of meniscus repair and knee functional scores suggested that 5×107 cells are optimal for meniscus injury *** summary,we present the first report of a phase I clinical trial using IMRCs to treat meniscus *** results demonstrated that intra-articular injection of IMRCs is a safe and effective therapy by providing a permissive niche for cartilage regeneration.

关键词： meniscus injuries cartilage

Anti-anxiety activity of successive extracts of angelica archangelica *** the elevated t-maze and forced swimming tests in rats

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Journal of Traditional Chinese Medicine 2012年第3期32卷 423-429页

作者： Dinesh Kumar zulfiqar ali Bhat M.Y.shah Department of Pharmaceutical Sciences University of KashmirJammu and KashmirSrinagar-190006India

OBJECTIVE:Angelica archangelica *** widely used in food and liquor preparations and also in Kashmiri folk medicine to reduce *** evaluated the anxiolytic effect of successive extracts of *** linn.(SAE) on rats tested in the elevated T-maze test(an animal model of generalized anxiety) at doses that exhibit antidepressant-like activity in ***:***(1 kg) was subjected to successive extraction in a soxhlet apparatus with solvents [petroleum ether(40-60℃),chloroform,ethyl acetate,methanol and decoction with water] in order of increasing polarity(yield:6.9%,7.3%,5.1%,11.88% and 8.2% w/w,respectively).SAE were evaluated for anxiolytic effects using the elevated T-maze and forced swimming tests in ***:Oral dosing of diazepam(1 mg/kg) and extracts(50,100 and 200 mg/kg) clearly showed an anxiolytic-like profile in the elevated T-maze test:it increased one-way escape and decreased inhibitory avoidance on the first,third and seventh *** the forced swimming test,imipramine and SAE showed antidepressant-and anxiolytic-like effects as reflected by increased climbing time,swimming time and decreased immobility time on the first,third and seventh *** and methanol extracts showed the most,petroleum ether(40-60℃) and chloroform intermediate,and ethyl acetate the least anxiolytic activity(*P<0.05,**P<0.01,***P< 0.001) in both ***:These results suggest the anti-anxiety activity of various extracts of *** and strongly justify its use in traditional Indian medicine for the treatment of anxiety.

关键词： Anxiolytic Elevated T-maze test Angelica archangelica linn Apiaceae Antidepressant

Nonlinear Localization due to a Double Negative Defect Layer in a One-Dimensional Photonic Crystal Containing Single Negative Material Layers

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Chinese Physics Letters 2008年第1期25卷 137-140页

作者： Munazza zulfiqar ali Tariq Abdullah Centre of Excellence in Solid State Physics Quaid-i-Azam Campus Punjab University Lahore 54590 Pakistan

We investigate the effects of introducing a defect layer negative material layers on the transmission properties in a one-dimensional photonic crystal containing single The width of the defect layer is taken to be the same or smaller than the period of the structure. Different cases of the defect layer being linear or nonlinear and double positive or double negative are discussed. It is found that only a nonlinear double negative layer gives rises to a localized mode within the zero-Φeff gap in this kind of structure. It is also shown that the important characteristics of the nonlinear defect mode such as its frequency, its FWHM and the threshold of the associated bistability can be controlled by changing the widths of the defect layer and the host layers.

关键词： pulsars x-ray spectra relativity and gravitation redshift

Clean production of lactic acid by selective carbon-carbon bond cleavage of biomass feedstock over a novel carbon-bismuth oxychloride photocatalyst

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Frontiers of Chemical Science and Engineering 2024年第2期18卷 69-81页

作者： zulfiqar ali Jiliang Ma Dongnv Jin Rui Cui Runcang Sun Liaoning Key Lab of Lignocellulose Chemistry and Biomaterials Liaoning Collaborative Innovation Center for Lignocellulosic BiorefineryCollege of Light Industry and Chemical EngineeringDalian Polytechnic UniversityDalian 116034China

The use of functional materials such as carbon-bismuth oxyhalides in integrated photorefineries for the clean production of fine chemicals requires restructuring.A facile biomass-assisted solvothermal fabrication of carbon/bismuth oxychloride nanocomposites(C/BiOCl)was achieved at various *** with BiOCl and C/BiOCl-120,C/BiOCl-180 exhibited higher crystallinity,wider visible light absorption,and a faster migration/separation rate of photoinduced *** the selective C–C bond cleavage of biomass-based feedstocks photocatalyzed by C/BiOCl-180,the xylose conversion and lactic acid yield were 100%and 92.5%,respectively.C/BiOCl-180 efficiently converted different biomass-based monosaccharides to lactic acid,and the efficiency of pentoses was higher than that of ***,lactic acid synthesis was favored by all active radicals including superoxide ion(·O_(2)^(−)),holes(h^(+)),hydroxyl radical(·OH),and singlet oxygen(^(1)O_(2)),with·O_(2)^(−)playing a key *** fabricated photocatalyst was stable,economical,and *** use of biomass-derived monosaccharides for the clean production of lactic acid via the C/BiOCl-180 photocatalyst has opened new research horizons for the investigation and application of C–C bond cleavage in biomass-based feedstocks.

关键词： carbon-carbon bond cleavage biomass reforming C/BiOCl lactic acid photocatalysis

Effect of loading rate and time delay on the tangent modulus method(TMM)in coal and coal measured rocks

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International Journal of Coal Science & Technology 2022年第6期9卷 51-63页

作者： zulfiqar ali Murat Karakus Giang D.Nguyen Khalid Amrouch School of Civil Environmental and Mining EngineeringUniversity of AdelaideAdelaideSA 5000Australia Australian School of Petroleum and Energy University of AdelaideAdelaideSA 5000Australia Geology&Sustainable Mining Mohammed VI Polytechnic University43150 BenguerirMorocco

Non-destructive techniques of in-situ stress measurement from oriented cored rocks have great potential to be developed as a cost cost-effective and reliable alternative to the conventional overcoring and hydraulic fracturing *** tangent modulus method(TMM)is one such technique that can be applied to oriented cored rocks to measure in-situ *** the deformation rate analysis(DRA),the rock specimen is subjected to two cycles of uniaxial compression and the stress-tangent modulus curve for the two cycles is obtained from the stress-strain curve.A bending point in the tangent modulus curve of the first cycle is observed,separating it from the tangent modulus curve of the second *** point of separation between the two curves is assumed to be the previously applied maximum stress.A number of experiments were conducted on coal and coal measured rocks(sandstone and limestone)to understand the effect of loading conditions and the time *** specimens were preloaded,and cyclic compressions were applied under three different modes of loading,four different strain rates,and time delays of up to one *** bending point in the stress-tangent modulus curves occurred approximately at the applied pre-stress levels under all three loading modes,and no effect of loading rate was observed on the bending points in ***,a clear effect of time delay was observed on the TMM,contradicting the DRA *** could be due to the sensitivity of TMM and the range of its applicability,all of which need further investigation for the in-situ stress measurement.

关键词： Tangent modulus method TMM Deformation rate analysis DRA Time delay Strain rate

Graphene Nanosheets Decorated with Copper Oxide Nanoparticles for the Photodegradation of Methylene Blue

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Chemical Research in Chinese Universities 2022年第6期38卷 1518-1525页

作者： Samavia RAFIQ zulfiqar ali RAZA Muhammad ASLAM Muhammad Junaid BAKHTIYAR Department of Applied Sciences National Textile UniversityFaisalabad37610Pakistan

Textile industries extensively use colorants,such as methylene blue,and if disposed off untreated,they contaminate the effluent streams,causing a severe impact on the environment and aquatic *** degradation has been found as an inevitable approach to treat ***,we decorated the copper oxide nanoparticles on graphene nanosheets during the reflux *** resultant copper oxide/graphene nanocomposites were analyzed for structural and functional *** was observed that on increasing the copper oxide contents,the z-average size of the resultant nanocomposites *** X-ray diffraction analysis demonstrated the crystalline nature of the *** surface morphology of the copper oxide nanoparticles appeared to be spherical and that of the copper oxide/graphene composite somehow *** infrared analysis indicated successful intercalation of precursors in the *** bandgap of copper oxide/graphene nanocomposites varied in the range of 1.03—1.30 eV,which indicated their effective photocatalytic *** results demonstrated that after 120 min of exposure,the methylene blue removal efficiency reached 94.0%,92.2%,and 89.4%(mass fraction)on the copper oxide/graphene nanocomposite at copper oxide nanoparticles to graphene nanosheets ratios of 1:1,1.5:1,and 2:1(mass ratio),*** photodegradation performance of the prepared nano-catalyst was found satisfactory even after five cycles.

关键词： Copper oxide Graphene nanosheet Methylene blue Photocatalysis

The Complex Dynamics of Hepatitis B Infected Individuals with Optimal Control

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Journal of Systems Science & Complexity 2021年第4期34卷 1301-1323页

作者： DIN Anwarud LI Yongjin shah Murad ali Department of Mathematics Sun Yat-sen UniversityGuangzhou 510275China School of Mathematical Sciences Beiing Normal UniversityBeijing 100875China

This paper proposes various stages of the hepatitis B virus(HBV)besides its transmissibility and nonlinear incidence rate to develop an epidemic *** authors plan the model,and then prove some basic results for the well-posedness in term of boundedness and ***,the authors find the threshold parameter R0,called the basic/effective reproductive number and carry out local sensitive ***,the authors examine stability and hence condition for stability in terms of *** using sensitivity analysis,the authors formulate a control problem in order to eradicate HBV from the population and proved that the control problem actually *** complete characterization of the optimum system was achieved by using the 4th-order Runge-Kutta procedure.

关键词： Hepatitis B epidemic model non-linear incidence normalized sensitivity index numerical simulation optimization theory reproduction number stability analysis