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Incentive-Driven Approach for Misbehavior Avoidance in Vehicular Networks

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Computers, Materials & Continua 2022年第3期70卷 6089-6106页

作者： Shahid Sultan Qaisar Javaid Eid Rehman ahmad aziz Alahmadi Nasim Ullah Wakeel Khan Department of Computer Science and Software Engineering International Islamic UniversityIslamabad44000Pakistan Department of Software Engineering Foundation University Islamabad44000Pakistan Department of Electrical Engineering Taif University KSA Taif21944Saudi Arabia Department of Electrical Engineering Foundation University Islamabad44000Pakistan

For efficient and robust information exchange in the vehicular adhoc network,a secure and trusted incentive reward is needed to avoid and reduce the intensity of misbehaving nodes and congestion especially in the case where the periodic beacons exploit the *** addition,we cannot be sure that all vehicular nodes eagerly share their communication assets to the system for message dissemination without any ***,there may be some misbehaving nodes and due to their selfish and greedy approach,these nodes may not help others on the *** deal with this challenge,trust-based misbehavior avoidance schemes are generally reflected as the capable *** this paper,we employed a fair incentive mechanism for cooperation aware vehicular communication *** order to deploy a comprehensive credit based rewarding scheme,the proposed rewardbased scheme fully depends on secure and reliable cryptographic *** order to achieve the security goals,we used the cryptographic scheme to generate a certified public key for the authenticity of every message exchange over the *** evaluated the friction of misbehaving vehicles and the effect of rewarding schemes in context with honest messages dissemination over the network.

关键词： VANET misbehavior reputation rewards congestion avoidance certified public key

Establishing a breast cancer center in Herat,Afghanistan:an implementation study

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Global Health Journal 2021年第4期5卷 204-208页

作者： aziz-ur-Rahman Niazi aziz ahmad Jami ahmad Zia Shams ahmad Saeed Mahmoodi Eckart Krapfl Stephan Falk Alexander Buia Ernst Hanisch Faculty of Medicine Herat UniversityHeratAfghanistan Afghanistan Surgeons Society-West Andisha buidingEast of Herat Stadium7 Ahmad Shah Bada RoadHeratAfghanistan Kimia Hospital Qomandani Amniya StreetHeratAfghanistan German Cancer Research Center Im Neuenheimer Feld 280Heidelberg 69120Germany Interdisziplinäres Brustzentrum Asklepios Klinik LangenRöntgenstraβe 20Langen 63225Germany Center for Histology Cytology and Molecular Diagnostics TrierMax-Planck-Str.5Trier 54296Germany Department of General Visceral and Thoracic Surgery Asklepios Klinik LangenRöntgenstraβe 20Langen 63225Germany

Objective:Breast cancer is the most common cancer in women,causing significant mortality in the world,which contributed 11.7%to the overall cancer-related mortality in *** 2018,3062 new breast cancer cases were reported accounting for 29.7%of all cancers in women in the ***,a comprehensive diagnostic and therapeutic system is lacking in *** this paper,we reported the implementation of a project aiming to establish a comprehensive breast cancer center in Herat province of ***:From July 2017,a two-year-program initiated at Kimia Hospital in *** first free diagnostic and therapeutic breast cancer project planned by the Afghanistan Surgeons Society-West and the Verein für Afghanistan-Förderung e.V.,as well supported by three international *** target populations of this project were women presenting with breast problems at Kimia Hospital in Herat and healthcare staff involved in breast cancer diagnosis and ***:A group of six medical personnel chosen to represent the breast cancer core team for breast cancer diagnosis and management were trained in *** caregivers established the breast cancer service and tumor *** a period of 20 months,a total of 632 women with breast problems presented to Kimia Hospital of whom 44(7.0%)were diagnosed with breast *** was established by a physical examination,ultrasonography,mammography,biopsy and *** included surgery,radiotherapy and *** seminars for 512 healthcare workers,1000 brochures and a movie were prepared for awareness-raising *** continuation of this project,potential resource providers were identified.A database was developed to record project ***:Implementation of this comprehensive breast cancer project resulted in significant achievements in healthcare staff capacity building,diagnosis and management of breast cancer patients in Herat *** obtai

关键词： Breast cancer Implementation Heart Afghanistan

XPC Lys939Gln polymorphism, smoking and risk of sporadic colorectal cancer among Malaysians

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World Journal of Gastroenterology 2013年第23期19卷 3623-3628页

作者： Abdul aziz ahmad Aizat Mohd Shahpudin Siti Nurfatimah Mustapha Mohd Aminudin Ravindran Ankathil Human Genome Centre School of Medical SciencesUniversiti Sains Malaysia Health Campus16150 Kubang Kerian Kelantan Malaysia

AIM: To investigate the risk association of xeroderma pigmentosum group C (XPC ) Lys939Gln polymorphism alone and in combination with cigarette smoking on colorectal cancer (CRC) predisposition. METHODS: Peripheral blood samples of 510 study subjects (255 CRC patients, 255 controls)were collected. DNA was extracted and genotyping was performed using polymerase chain reaction-restriction fragment length polymorphism. The association between polymorphic genotype and CRC predisposition was determined using the OR and 95%CI. RESULTS: The frequency of the homozygous variant (Gln/Gln) genotype was significantly higher in cases compared with controls (16.0% vs 10.2%, P = 0.049). The Gln/Gln genotype of XPC showed a significantly higher association with the risk of CRC (OR = 1.884; 95%CI: 1.082-3.277; P = 0.025). In the case of allele frequencies, variant allele C was associated with a significantly increased risk of CRC (OR = 1.375; 95%CI: 1.050-1.802; P = 0.020). Moreover, the risk was markedly higher for those who were carriers of the Gln/Gln variant genotype and were also cigarette smokers (OR = 3.409; 95%CI: 1.061-10.949; P = 0.032). CONCLUSION: The XPC Gln/Gln genotype alone and in combination with smoking increases the risk of CRC among Malaysians.

关键词： DNA repair Xeroderma pigmentosum group C Lys939Gln polymorphism Cigarette smoking Colorectal cancer Susceptibility risk

Combined DFT and experiment:Stabilizing the electrochemical interfaces via boron Lewis acids

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Journal of Energy Chemistry 2021年第8期30卷 100-107,I0004页

作者： Zhe-Fan Wang Zonglin Yi aziz ahmad Lijing Xie Jing-Peng Chen Qingqiang Kong Fangyuan Su Da-Wei Wang Cheng-Meng Chen CAS Key Laboratory of Carbon Materials Institute of Coal ChemistryChinese Academy of SciencesTaiyuan 030001China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of Sciences100049 BeijingChina University of Chinese Academy of Sciences 100049 BeijingChina School of Chemical Engineering The University of New South WalesSydney 2052Australia

The incorporation of boron into carbon material can significantly enhance its capacity ***,the origin of the promotion effect of boron doping on electrochemical performances is still unclear,in part due to the inadequate exposure of boron configurations resulting from the complexity of traditional carbon *** overcome this issue,herein,a series of boron-doped graphene with highly-exposed boron configurations are prepared by tuning annealing *** the correlation between boron configurations and the electrochemical performances is *** combination of density-functional theory(DFT)computation and NH3-TPD/Py-FTIR indicates that the BCO_(2)configuration formed on the surface of graphene is easier to accept lone-pair electrons than BC_(2)O and BC_(3)configurations due to the stronger Lewis *** an electronic structure can effectively reduce the number of unstable electron donors and stabilize the electrochemical interface,which is proved by NMR,and critical for improving the electrochemical *** experiments confirm that the optimized BG800 with the largest amount of BCO_(2)configuration presents ultralow leak current,improved cyclic stability,and better rate performance in SBPBF4/*** work would provide an insight into the design of high-performance boron-doped carbon materials towards energy storage.

关键词： Boron doped graphene Lewis acid Electrochemical interfaces DFT

Probing the Efficiency of PPMG-Based Composite Electrolytes for Applications of Proton Exchange Membrane Fuel Cell

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Transactions of Tianjin University 2024年第3期30卷 262-283页

作者： Shakeel Ahmed Faizah Altaf Safyan Akram Khan Sumaira Manzoor aziz ahmad Muhammad Mansha Shahid Ali Ata-ur-Rehman Karl Jacob School of Material Science and Engineering Henan International Joint Laboratory of Nano-Photoelectric Magnetic MaterialsHenan University of TechnologyZhengzhou 450001China Interdisciplinary Research Center for Hydrogen Technologies and Carbon Management King Fahd University of Petroleum and Minerals31261 DhahranSaudi Arabia School of Materials Science and Engineering Georgia Institute of TechnologyAtlantaGA 30332USA

PPMG-based composite electrolytes were fabricated via the solution method using the polyvinyl alcohol and polyvinylpyrrolidone blend reinforced with various contents of sulfonated inorganic *** acid was employed as the sulfonating agent to functionalize the external surface of the inorganic filler,i.e.,graphene *** proton conductivities of the newly prepared proton exchange membranes(PEMs)were increased by increasing the temperature and content of sulfonated graphene oxide(SGO),i.e.,ranging from 0.025 S/cm to 0.060 S/*** induction of the optimum level of SGO is determined to be an excellent route to enhance ionic *** single-cell performance test was conducted by sandwiching the newly prepared PEMs between an anode(0.2 mg/cm^(2) Pt/Ru)and a cathode(0.2 mg/cm^(2) Pt)to prepare membrane electrode assemblies,followed by hot pressing under a pressure of approximately 100 kg/cm^(2) at 60℃for 5–10 *** highest power densities achieved with PPMG PEMs were 14.9 and 35.60 mW/cm^(2) at 25℃and 70℃,respectively,at ambient pressure with 100%relative *** showed that the newly prepared PEMs exhibit good electrochemical *** results indicated that the prepared composite membrane with 6 wt%filler can be used as an alternative membrane for applications of high-performance proton exchange membrane fuel cell.

关键词： Proton exchange membrane fuel cell Sulfonated graphene oxide Polyvinylpyrrolidone Solution casting Membrane electrode assembly Fuel cell performance

A High Energy Density Self-supported and Bendable Organic Electrode for Redox Supercapacitors with a Wide Voltage Window

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Chinese Journal of Polymer Science 2020年第5期38卷 522-530,I0007页

作者： Rashid lqbal aziz ahmad Li-Juan Mao Zahid Ali Ghazi Abolhassan Imani Chun-Xiang Lu Li-Jing Xie Saad Melhi Fang-Yuan Su Cheng-Meng Chen Lin-Jie Zhi Zhi-Xiang Wei Chinese Academy of Sciences(CAS)Key Laboratory of Nanosystem and Hierarchical Fabrication National Center for Nanoscience and TechnologyBeijing 100190China CAS Key Laboratory of Carbon Materials Institute of Coal ChemistryChinese Academy of SciencesTaiyuan 030001China University of Chinese Academy of Sciences Beijing 100049China Department of Chemistry College of ScienceUniversity ofBishaBisha 61922Saudi Arabia

Redox-active organic electrode materials are highly desirable in realizing next-generation all-in-one bendable electronic ***,a novel flexible supercapacitors(SCs)electrode is fabricated from poly(anthraquinonyl sulfide)(PAQS)and single-walled carbon nanotubes(SWCNTs)suspension by a simple vacuum filtration and named as *** PAQS-SWCNTs electrode offered an initial capacitance of 223 F·g^-1 and outstanding capacitance retention up to 78.4%after 3×10^4 charge-discharge cycles at 0.5 A·g^-1 current *** a high potential range(0-3 V)and aprotic electrolyte,the PAQS-SWCNTs electrodes in coin cell exhibited an outstanding energy density of 69 Wh·kg^-1 at a power density of 90.6 W·kg^-1,whereas in the fabricated flexible SCs it retained 63.2 Wh·kg^-*** PAQS-SWCNTs electrodes also showed extraordinary performance at a higher current density(20 A·g^-1)and maintained a specific capacitance of 55 and 47 F·g^-1 for coin and flexible SCs,***,the flexible SC is further verified to be able to illuminate up multiple *** futuristic findings showed that the SCs assembled with flexible PAQS-SWCNTs electrodes have potential application in energy-storage devices and make them highly appealing for future redox supercapacitors.

关键词： Redox-active High energy density PAQS SWCNTs Flexible SCs

Establishment and Optimization Growth of Shoot Buds-Derived Callus and Suspension Cell Cultures of <i>Kaempferia parviflora</i>

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American Journal of Plant Sciences 2014年第18期5卷 2693-2699页

作者： Ab Rahman Zuraida Othman Ayu Nazreena Kamarulzaman Fatin Liyana Izzati ahmad aziz Biotechnology Research Centre MARDI Headquarters MARDI HQ Persiaran MARDI-UPM Serdang Malaysia School of Science and Food Technology Kuala Terengganu Malaysia

Callus and suspension cells culture of Kaempferia parviflora was successfully established. Meristematic shoots can be used for utilization of plant cell biosynthetic capabilities for obtaining useful products from valuable medicinal plant to meet out the pharmaceutical demand and also for studying the metabolism. The medium containing combination of 0.2 mg/L 2,4-dichlorophenoxyacetic acid (2,4-D) and 0.2 mg/L napthyleneacetic acid (NAA) promoted the highest callus induction at 20%. Transferring the initiated callus on the medium with 1 mg/L 2,4-D enhanced the proliferation rate up to maximum fresh weight of 6.71 gm. Growth curve of cultured cells revealed that the cells continued to grow until 50 days of culture and showed the highest peak (fresh weight) at 40 days in all different initial weight tested ( 0.2, 0.5 and 1.0 gram). Isolated embryogenic callus was found to produce the highest in weight when suspended in liquid medium supplemented with 1 mg/L 2,4-D at 110 rpm resulted 13.5 gram fresh weight and 1080 mg dry weight.

关键词： Kaempferia parviflora Suspension Cultures Meristematic Shoots Callus Induction

Direct Shoot Regeneration from Callus of <i>Melicope lunu-ankenda</i>

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Natural Science 2015年第2期7卷 81-87页

作者： Ab. Zuraida Rahman Ayu Nazreena Othman Fatin Liyana Izzati Kamaruddin aziz Bin ahmad Biotechnology Research Centre MARDI Headquarters Persiaran MARDI-UPM Serdang Malaysia School of Science and Food Technology Universiti Malaysia Terengganu Kuala Nerus Malaysia Centre for Fundamental and Liberal Education Universiti Malaysia Terengganu Kuala Nerus Malaysia

Melicope lunu-ankenda is commonly used in traditional medicine. The conventional propagation method for this species is inefficient due to low propagation rate and its lengthy period to maturity. In addition, insufficient planting materials often pose a problem for the plantation sector. The tissue culture technique is best alternative to overcome the problems. The callus induction and direct shoot regeneration protocols for M. lunu-ankenda were established. Callus was successfully initiated from leaves explants cultured in MS medium added with 2,4-D at concentrations 0.5 to 5.0 mg/L singly or in combination with NAA at concentrations 1.0 to 10 mg/L. Shoot was regenerated from callus in phytohormone-free medium, BAP at concentrations 0.5 - 5.0 mg/L singly or in combination of BAP with NAA or 2,4-D at concentration 0.5 and 1.0 mg/L, respectively. BAP at 1.0 mg/L induced the highest shoot regeneration rate (80%) and number of plantlet per calli. The established methods might be used for production of phytochemicals and plantlets in large scale.

关键词： Melicope lunu-ankenda Regeneration Plant Growth Regulator In Vitro

Two paths, one goal: mechanism of calcium homeostasis to balance plant growth and immunity

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Science China Life Sciences 2025年第1期68卷 306-308页

作者： aziz Ul Ikram Yanping Jing Huan Chen Jian Chen International Genome Center Jiangsu University Joint Center for Single Cell Biology School of Agriculture and BiologyShanghai Jiao Tong University

Calcium(Ca2+) is an essential nutrient and a cellular signal in plants. The level of free Ca2+in the apoplast is ～10,000-fold higher than that in the cytoplasm at the resting state. This large Ca2+level gradient across the membrane between the interior and exterior can cause Ca2+overload and toxicity. Plants have evolved mechanisms to export Ca2+out of the cytoplasm or store it in intracellular organelles, such as endoplasmic reticulum（ER）, mitochondria, and vacuole.

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