http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Fungal endophyte Penicillium janthinellum LK5 improves growth of ABA-deficient tomato under salinity
Khan, Abdul Latif,Waqas, Muhammad,Khan, Abdur Rahim,Hussain, Javid,Kang, Sang-Mo,Gilani, Syed Abdullah,Hamayun, Muhammad,Shin, Jae-Ho,Kamran, Muhammad,Al-Harrasi, Ahmed,Yun, Byung-Wook,Adnan, Muhammad Springer-Verlag 2013 World journal of microbiology & biotechnology Vol.29 No.11
Adnan Ahmed,Lan Xu,Jing Yin,Mingdi Wang,Fawad Khan,Muhammad Ali 한국섬유공학회 2020 Fibers and polymers Vol.21 No.9
It is very difficult to electrospin pure chitosan (CS) due to the repulsive forces between its ionic groups producedin the electrospinning process, resulting in the formation of nanofibers by blending CS with other natural or syntheticpolymers for electrospinning. In this research work, a high-throughput fabrication of CS/poly(ethylene oxide) (PEO)nanofibers were obtained using a modified free surface electrospinning (MFSE), which contained a titanium solutionreservoir with thick smooth edges. Effects of the concentrations of acetic acid (AA), CS and PEO on the conductivity andviscosity of spinning solutions as well as the morphology, crystallinity and yield of CS/PEO nanofibers were investigated. And the fabrication mechanism of MFSE was studied by simulating the electric field distribution using Maxwell 3D due tothe importance of electric field distribution in the spinning process. The simulation results of electric field were in keepingwith the experimental data and indicated the MFSE could produce a lot of high-quality CS/PEO nanofibers.
Survey on Network Virtualization Using OpenFlow: Taxonomy, Opportunities, and Open Issues
( Ahmed Abdelaziz ),( Tan Fong Ang ),( Mehdi Sookhak ),( Suleman Khan ),( Athanasios Vasilakos ),( Chee Sun Liew ),( Adnan Akhunzada ) 한국인터넷정보학회 2016 KSII Transactions on Internet and Information Syst Vol.10 No.10
The popularity of network virtualization has recently regained considerable momentum because of the emergence of OpenFlow technology. It is essentially decouples a data plane from a control plane and promotes hardware programmability. Subsequently, OpenFlow facilitates the implementation of network virtualization. This study aims to provide an overview of different approaches to create a virtual network using OpenFlow technology. The paper also presents the OpenFlow components to compare conventional network architecture with OpenFlow network architecture, particularly in terms of the virtualization. A thematic OpenFlow network virtualization taxonomy is devised to categorize network virtualization approaches. Several testbeds that support OpenFlow network virtualization are discussed with case studies to show the capabilities of OpenFlow virtualization. Moreover, the advantages of popular OpenFlow controllers that are designed to enhance network virtualization is compared and analyzed. Finally, we present key research challenges that mainly focus on security, scalability, reliability, isolation, and monitoring in the OpenFlow virtual environment. Numerous potential directions to tackle the problems related to OpenFlow network virtualization are likewise discussed
Bilal Ahmed Usmani,Saqib-Ur-Rehman,Syed Adnan Hussain,Kamran Khan,Atia Elahi 한국기상학회 2019 Asia-Pacific Journal of Atmospheric Sciences Vol.55 No.4
Several studies have linked ongoing austral winter drying conditions in southwest Western Australia (SWWA) to changes in regional and large scale sea level pressure. As the region bounded by SWWA occupies limited observation of a typical global climate model (GCM), it is not easy to infer the influence of global climate change during the drought inSWWA. In this study, we explore the relationships between early winter (May-Aug) rainfall in Kent river catchment (KRC), Southwestern Australia and Indian Ocean High Pressure system.We construct two objective indices of Indian Ocean High Pressure system (IOHPS), viz., (i) the intensity of Indian Ocean High Pressure (IOHP) and, (ii) the Indian Ocean High Longitude (IOHLN) using National Center of Environmental Prediction mean sea-level pressure (MSLP) reanalysis data. The station data of seasonal rainfall is obtained from Australian Bureau of Meteorology. A representative rainfall index for the KRC was built by averaging the seasonal rainfall three major stations for the period of 1951–2016. Significant inverse relationship is found between early wintertime precipitation in KRC, Southwestern Australia and the IOHP and IOHLN. The IOHPS accounts for more of the early winter (May–August) precipitation variation in KRC than the Southern Oscillation Index (SOI), Southern Annular mode (SAM) and Indian Ocean Dipole (IOD). Our significant findings suggest that strengthening of IOHP and zonal movement of IOHPS has a major contribution in decline of early winter precipitation in KRC.
Naveed Ahmed,Adnan,Umar Khan,Syed Tauseef Mohyud-Din,Ilyas Khan,Kottakkaran Sooppy Nisar 한국자기학회 2020 Journal of Magnetics Vol.25 No.2
The objectives of the research are to explored the heat and mass transport over a paraboloid surface of revolution by taking the effects of Lorentz force, resistive heating and internal heat source. The dimensionless version of the model was attained via similarity transformations. Then, for solution purpose, RK scheme is utilized and performed computations for the flow fields. The influence of different physical quantities on the flow characteristics described comprehensively via graphs. It is examined that the stretching index parameter m opposes the fluid velocity and the temperature enhances for Eckert number. Moreover, significant impacts of the Schmidt number are observed for mass transfer gradient.
Sargassum swartzii extracts ameliorate memory functions by neurochemical modulation in a rat model
Pirzada Jamal Ahmed Siddiqui,Adnan Khan,Nizam Uddin,Saima Khaliq,Munawwer Rasheed,Shazia Nawaz,Ahsana Dar,Muhammad Hanif 한국식품과학회 2017 Food Science and Biotechnology Vol.26 No.4
Recently, considerable attention has been paid to drug exploration from natural sources for treating memory loss, a major manifestation of various neurodegenerative diseases. Increasing evidences implicate brain serotonin metabolism in learning and memory, supporting the notion that targeting 5-HT (5-hydroxytryptamine) and its receptors would be beneficial in the treatment of cognitive disorders. In the present study, behavioral and neurochemical effects were examined following administration of Sargassum swartzii extracts in albino Wistar rats. Increase in spatial working memory and recognition memory was exhibited by the seaweed-treated rats as compared to controls. Plasma tryptophan, brain 5-HT, and 5-hydroxyindoleacetic acid levels were measured using HPLC–ECD, and a significant increase in brain 5-HT metabolism was observed in the seaweed-treated rats. The increase in memory functions following repeated administration of S. swartzii extracts is suggested to be due to the increased serotonergic neurotransmission in the brain of seaweed-treated rats.
Optimality of Linear MIMO Detection for 5G Systems via 1-Opt Local Search
Khurshid Kiran,Khan Adnan Ahmed,Siddiqui Muhammad Haroon,Hadi M. Usman,Rashid Imran,Imran Muhammad 대한전기학회 2021 Journal of Electrical Engineering & Technology Vol.16 No.2
Multiple input multiple output (MIMO) symbol detection problem belongs to non-deterministic polynomial acceptable hard combinatorial optimization (CO) class. One of the key trials in design of MIMO scheme is to develop a low complexity detection algorithm without much compromise in performance. Detection approaches proposed in the literature can be split into non-linear and linear algorithms. Vertical Bell-Labs Layered Space Time (V-BLAST) and Sphere Decoder (SD) are non-linear methods used for extracting transmitted data; whereas, Zero-Forcing (ZF) and Minimum Mean Square Error (MMSE) detections are comparatively in complex and eff ectual linear techniques. In this work, the heuristic 1-Opt local search method used for solving computationally hard combinatorial optimization problems is applied to the ZF and MMSE detection algorithms. First, simple MIMO decoding using ZF and MMSE is accomplished to fi nd the estimated symbol then the transmitted symbol is calculated using the heuristic 1-opt approach by means of the estimated symbol. Simulation results demonstrate that 1-opt search when applied to the ZF and MMSE displays better bit error rate (BER) performance than the simple ZF and MMSE detectors. It is also verifi ed through simulations that the proposed 1-Opt based detectors display better BER performance as compared to the complex nonlinear VBLAST and SD at considerably reduced complexity. Hence, the proposed detectors are appropriate for eff ective hardware implementations.
Carbon rich fly ash and their nanostructures
Numan Salah,Sami S. Habib,Zishan H. Khan,Ahmed Alshahrie,Adnan Memic,Attieh A. Al-ghamdi 한국탄소학회 2016 Carbon Letters Vol.19 No.-
Carbon rich fly ash was recently reported to have compositions that are ideal for use as a precursor and catalyst for carbon nanotube growth. This fly ash powder is mostly composed of pure carbon, predominantly present as sp2. In this work, the effect of sonication time on the morphology and structural properties of carbon rich fly ash particles is reported. The obtained results show that ultrasound treatment is an effective tool for producing ultrafine particles/fragments with higher porosity, which might be suitable for the adsorption of gasses. Moreover, carbon nanoparticles (CNPs) of this fly ash were produced in parallel using the ball milling technique, and were evaluated as reinforcements for epoxy based composites. These CNPs have almost spherical shapes with particle sizes of around 30 nm. They were found to have strong C=O carbonyl group bonds, which might be generated during the ball milling process. The tensile testing results of a fly ash CNP reinforced epoxy composite showed significant improvements in the mechanical properties, mainly in the stiffness of the polymer. The stiffness value was increased by around 23% of that of neat epoxy. These CNPs with chemically active groups might also be useful for other applications.