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Perceptual quality assessment of panoramic stitched contents for immersive applications:a prospective survey

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Virtual Reality & Intelligent Hardware 2022年第3期4卷 223-246页

作者： Hayat ULLAH Sitara AFZAL imran Ullah khan Department of Computer Science Kansas State UniversityManhattanKS 66506USA Department of Software Sejong UniversitySeoul 143-747Republic of Korea

The recent advancements in the field of Virtual Reality(VR)and Augmented Reality(AR)have a substantial impact on modern day technology by digitizing each and everything related to human life and open the doors to the next generation Software Technology(Soft Tech).VR and AR technology provide astonishing immersive contents with the help of high quality stitched panoramic contents and 360°imagery that widely used in the education,gaming,entertainment,and production *** immersive quality of VR and AR contents are greatly dependent on the perceptual quality of panoramic or 360°images,in fact a minor visual distortion can significantly degrade the overall ***,to ensure the quality of constructed panoramic contents for VR and AR applications,numerous Stitched Image Quality Assessment(SIQA)methods have been proposed to assess the quality of panoramic contents before using in VR and *** this survey,we provide a detailed overview of the SIQA literature and exclusively focus on objective SIQA methods presented till *** better understanding,the objective SIQA methods are classified into two classes namely Full-Reference SIQA and No-Reference SIQA *** class is further categorized into traditional and deep learning-based methods and examined their performance for SIQA ***,we shortlist the publicly available benchmark SIQA datasets and evaluation metrices used for quality assessment of panoramic *** last,we highlight the current challenges in this area based on the existing SIQA methods and suggest future research directions that need to be target for further improvement in SIQA domain.

关键词： Virtual reality Augmented reality Panoramic image Immersive contents Stitched image quality assessment Deep learning Convolutional neural networks

A simple and facile iodination method of didechlorotiacumicin B and aromatic compounds

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Science China Chemistry 2021年第10期64卷 1736-1742页

作者： Haibo Zhang Liping Zhang imran khan Guangtao Zhang Yiguang Zhu Changsheng Zhang Key Laboratory of Tropical Marine Bio-resources and Ecology Guangdong Key Laboratory of Marine Materia MedicaRNAM Center for Marine MicrobiologySouth China Sea Institute of OceanologyChinese Academy of SciencesGuangzhou 510301China Sanya Institute of Oceanology SCSIOYazhou Scientific BaySanya 572000China Southern Marine Science and Engineering Guangdong Laboratory(Guangzhou) Guangzhou 511458China University of Chinese Academy of Sciences Beijing 100049China

Tiacumicin B(also known as fidaxomicin or difimicin)is a marketed 18-membered macrolide antibiotic for the treatment of Clostridium difficile *** B is structurally characterized with two chlorine atoms substituted on the aromatic ring,which is installed by the halogenase Tia *** the study on halide compatibility of Tia M,a facile and nonenzymatic iodination method of didechlorotiacumicin B was discovered,requiring Na I,acid and air for iodination at room *** method was also amenable to other 9 aromatic substrates with electron-rich sites for iodination.

关键词： iodination tiacumicin metal-free facile chemistry

Chemical composition, mechanism of antibacterial action and antioxidant activity of leaf essential oil of Forsythia koreana deciduous shrub

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Asian Pacific Journal of Tropical Medicine 2015年第9期8卷 682-688页

作者： Xiao-Nan Yang imran khan Sun Chul Kang Department of Biotechnology College of Engineering Daegu University Kyungsan

Objective: To identify the chemical constituents of leaf essential oil of Forsythia koreana(F. koreana) and evaluate its ef ects on bacterial strains. Methods: The essential oil of leaf of F. koreana was extracted by using hydrodistillation process and the volatile components investigated with the help of gas chromatography coupled with mass spectrometry. The antibacterial study was carried out with the help of agar disc dif usion method, MIC, MBC and viable count. The mode of action was determined with help of potassium ion l ux, cellular material release and scanning electron microscopy. The antioxidant activity was determined with the help of 2, 3-diphenyl-2-picrylhydrazyl method, nitric oxide scavenging activity and superoxide anion radical scavenging assay. Results: Total ten compounds were identii ed as trans-phytol(42.73%), cis-3-hexenol(12.95%), 毬-linalool(10.68%), trans-2-hexenal(8.86%), trans-2-hexenol(8.86%), myrcenol(3.86%), 4-vinylphenyl acetate(3.86%),(4Z)-4,6-heptadien-1-ol(3.18%), lemonol(2.73%) and benzeneacetaldehyde(2.27%) by gas chromatography coupled with mass spectrometry. The antibacterial study was demonstrated that leaf essential oil of F. koreana act against foodborne and other pathogenic bacteria. The mode of action revealed that this essential oil acted on the cytoplasmic membrane, resulting in loss of integrity and increased permeability. In addition, leaf essential oil of F. koreana was shown to be rich in linalool, which contributes to improved antioxidant activity. Conclusions: These results show that leaf essential oil of F. koreana has great potential as a natural food preservative, antibacterial and antioxidant agent.

关键词： Antibacterial activity Antioxidant activity Cell material released Essential oil GC-MS Potassium ion flux

Proportional Fairness-Based Power Allocation Algorithm for Downlink NOMA 5G Wireless Networks

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Computers, Materials & Continua 2020年第11期65卷 1571-1590页

作者： Jianzhong Li Dexiang Mei Dong Deng imran khan Peerapong Uthansakul School of Finance Chongqing Technology and Business UniversityChongqingChina Department of Electrical Engineering University of Engineering and TechnologyPeshawarPakistan School of Telecommunication Engineering Suranaree University of TechnologyNakhon RatchasimaThailand

Non-orthogonal multiple access(NOMA)is one of the key 5G technology which can improve spectrum efficiency and increase the number of user connections by utilizing the resources in a non-orthogonal *** allows multiple terminals to share the same resource unit at the same *** receiver usually needs to configure successive interference cancellation(SIC).The receiver eliminates co-channel interference(CCI)between users and it can significantly improve the system *** order to meet the demands of users and improve fairness among them,this paper proposes a new power allocation *** objective is to maximize user fairness by deploying the least fairness in multiplexed ***,the objective function obtained is non-convex which is converted into convex form by utilizing the optimal Karush-Kuhn-Tucker(KKT)*** results show that the proposed power allocation scheme gives better performance than the existing schemes which indicates the effectiveness of the proposed scheme.

关键词： 5G NOMA user fairness resource optimization multiple access scheme

The relationship between energy consumption, economic growth and carbon dioxide emissions in Pakistan

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Financial Innovation 2020年第1期6卷 56-68页

作者： Muhammad Kamran khan Muhammad imran khan Muhammad Rehan School of Economics Northeast Normal UniversityChangchunJilinChina

Developing countries are facing the problem of environmental *** degradation is caused by the use of non-renewable energy consumptions for economic growth but the consequences of environmental degradation cannot be *** primary purpose of this study is to investigate the nexus between energy consumption,economic growth and CO_(2) emission in Pakistan by using annual time series data from 1965 to *** estimated results of ARDL indicate that energy consumption and economic growth increase the CO_(2) emissions in Pakistan both in short run and long *** on the estimated results it is recommended that policy maker in Pakistan should adopt and promote such renewable energy sources that will help to meet the increased demand for energy by replacing old traditional energy sources such as coal,gas,and *** energy sources are reusable that can reduce the CO_(2) emissions and also ensure sustainable economic development of Pakistan.

关键词： Energy consumption Economic growth CO_(2)emissions ARDL

Evaluation of antileishmanial,antibacterial and brine shrimp cytotoxic potential of crude methanolic extract of Herb Ocimum basilicum(Lamiacea)

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Journal of Traditional Chinese Medicine 2015年第3期35卷 316-322页

作者： imran khan Kafeel Ahmad Ali Talha Khalil Jangrez khan Yusra Ali khan Muhammad Shahab Saqib Muhammad Naveed Umar Hilal Ahmad Department of Biotechnology Quaid-i-Azam University Centre of Biotechnology and Microbiology University of Peshawar Department of Biochemistry Quaid-i-Azam University Islamabad Department of Chemistry University of Malakand Institute of Biotechnology and Genetic Engineering Agriculture UniversityPeshawar

OBJECTIVE:To collect and screen for ethnopharmacological properties(antileishmanial,antibacterial and brine lethality assays) of medicinal plant Ocimum basilicum from Peshawar region(34.008 latitude and 71.57 altitudes).METHODS:In the present study a general antileishmanial activity against Leishmania tropica strain was carried *** antibacterial potential of the plant was performed against 06 gram positive and 06 gram negative *** shrimp cytotoxicity assay at different concentrations were ***:The anti-promastigotes profile of the plant showed good antileishmanial activity exhibited LC_(50) value 21.67 μg/*** result for gram positive antibacterial activity revealed that the *** leaves extract possesses significant inhibitory activity at highest two concentrations ranging from20.66 ± 0.31 to 31.86 ± 0.80 for Clostridium perfringens type C and Bacillus subtitilis,respectively,as compared to the gentamycin(27.36 ± 0.55 and21.80 ± 0.72,respectively).For gram negative bacteria good activity was observed.A highest zone of inhibition was recorded for Pseudomonas aeroginosa(28.83 ± 0.28) atthe highest concentration(10 mg/mL).The LC_(50) value obtained for brine shrimp lethality assay was 91.56 μg/***:The herb basil possesses effective cidal activities which make this plant a good candidate for the isolation of antiprotozoal and antibacterial compounds which may lead to the development of novel drug.

关键词： Ocimum basilicum Cytotoxicity tests,immunologic Anti-bacterial agents Antileishmanial activity

The Impact of Hydrogen Energy Storage on the Electricity Harvesting

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Intelligent Automation & Soft Computing 2023年第5期36卷 1963-1978页

作者： Ghassan Mousa Ayman A.Aly imran khan DagØivind Madsen Department of Mechanical Engineering Faculty of EngineeringK.C.KARE Energy Research and Innovation CentreKing Abdulaziz UniversityJeddah21589Saudi Arabia Department of Mechanical Engineering College of EngineeringTaif UniversityP.O.Box 11099Taif21944Saudi Arabia Department of Electrical Engineering University of Engineering&Technology PeshawarPakistan University of South-Eastern Norway Bredalsveien 143511 HønefossNorway

The economics,infrastructure,transportation,and level of living of a country are all inﬂuenced by *** gap between energy usage and availabil-ity is a global ***,all countries rely on fossil fuels for energy genera-tion,and these fossil fuels are not *** hydrogen proton exchange membrane fuel cell(PEMFC)power system is both clean and efﬁ*** fuel delivery system and the PEMFC make up the majority of the PEMFC power *** lack of an efﬁcient,safe,and cost-effective hydrogen storage system is still a major barrier to its widespread *** hydrogen storage has the large capacity,safety and good *** a hydrogen source system,the hydro-gen supply characteristics affect the characteristics of the PEMFC at the *** this paper,a mathematical model of a hydrogen source reactor and PEMFC based on chemical absorption/desorption of solid hydrogen storage is established,and a simulation model of a PEMFC power system coupled with solid hydrogen storage is established using MATLAB/SIMULINK software,and the hydrogen supply of the reactor is analyzed in *** inﬂuence of prominent factors is *** research results show that the proposed method improved the system *** the same time,increasing the PEMFC temperature,increasing the area of the proton exchange membrane and the oxygen supply pressure can increase the output power of the power system.

关键词： Hydrogen energy fuel cell power system optimization electrical energy harvesting

Fabrication of magnetically recyclable yolk-shell Fe_(3)O_(4)@TiO_(2) nanosheet/Ag/g-C_(3)N_(4) microspheres for enhanced photocatalytic degradation of organic pollutants

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Nano Research 2021年第7期14卷 2363-2371页

作者： Yan Lv Lin Yue imran Mahmood khan You Zhou Wenbo Cao Sobia Niazi Zhouping Wang State Key Laboratory of Food Science and Technology Jiangnan UniversityWuxi 214122China School of Food Science and Technology Jiangnan UniversityWuxi 214122China International Joint Laboratory on Food Safety Jiangnan UniversityWuxi 214122China Collaborative Innovation Center of Food Safety and Quality Control of Jiangsu Province Jiangnan UniversityWuxi 214122China School of Food Science and Technology National Engineering Research Center of SeafoodDalian Polytechnic UniversityDalian 116024China

Herein,we report the fabrication of Fe_(3)O_(4)@TiO_(2) nanosheet/Ag/g-C_(3)N_(4)(Fe_(3)O_(4)@ns-TiO_(2)/Ag/g-C_(3)N_(4))composite photocatalysts with well-designed hierarchical yolk-shell *** endow the composites with fascinating features,multiple functional components are perfectly integrated into the definite *** photodegradation experiments of organic pollutants revealed a significant enhancement in photocatalytic activity of developed composites as compared to P25,which is mainly due to the synergetic interaction of the tailored three-dimensional(3D)yolk-shell porous nanostructure,extended sunlight response range,and retarded the recombination probability of photogenerated *** importantly,the hybrid samples exhibited superior magnetic properties due to the magnetic *** excellent magnetic recyclability and reusability of the photocatalysts are verified by the magnetic hysteresis loop and cyclic photocatalytic degradation experiments,which is significant for the green and sustainable applications of *** its remarkable photocatalytic performance and expectant magnetic recyclability,the composite photocatalysts are expected to be a promising candidate to dispose of future environmental issues.

关键词： TiO_(2)nanosheet Ag nanoparticles g-C_(3)N_(4) hierarchical yolk-shell structure photocatalysis magnetic separation

Energy Cost Minimization Using String Matching Algorithm in Geo-Distributed Data Centers

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Computers, Materials & Continua 2023年第6期75卷 6305-6322页

作者： Muhammad imran khan Khalil Syed Adeel Ali Shah Izaz Ahmad khan Mohammad Hijji Muhammad Shiraz Qaisar Shaheen Department of Computer Science&Information Technology University of Engineering&TechnologyPeshawar25000Pakistan Department of Computer Science Bacha Khan UniversityCharsadda24541Pakistan Computer Science Department University of TabukTabuk47512Saudi Arabia Department of Computer Science Federal Urdu University of ArtsScience and Technology Islamabad44000Pakistan Department of Computer Science and Information Technology The Islamia University of BahawalpurRahim Yar Khan CampusPunjabPakistan

Data centers are being distributed worldwide by cloud service providers(CSPs)to save energy costs through efficient workload alloca-tion *** CSPs are challenged by the significant rise in user demands due to their extensive energy consumption during workload *** research studies have examined distinct operating cost mitigation techniques for geo-distributed data centers(DCs).However,oper-ating cost savings during workload processing,which also considers string-matching techniques in geo-distributed DCs,remains *** this research,we propose a novel string matching-based geographical load balanc-ing(SMGLB)technique to mitigate the operating cost of the geo-distributed *** primary goal of this study is to use a string-matching algorithm(i.e.,Boyer Moore)to compare the contents of incoming workloads to those of documents that have already been processed in a data center.A successful match prevents the global load balancer from sending the user’s request to a data center for processing and displaying the results of the previously processed workload to the user to save *** the contrary,if no match can be discovered,the global load balancer will allocate the incoming workload to a specific DC for processing considering variable energy prices,the number of active servers,on-site green energy,and traces of incoming *** results of numerical evaluations show that the SMGLB can minimize the operating expenses of the geo-distributed data centers more than the existing workload distribution techniques.

关键词： String matching optimization geo-distributed data centers geographical load balancing green energy