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Modelling the combined effect of surface roughness and topography on bacterial attachment

Journal of Materials Science & Technology 2021年第22期81卷 151-161页

作者： Subash Bommu Chinnaraj Pahala Gedara Jayathilake Jack Dawson Yasmine ammar Jose Portoles Nicholas Jakubovics Jinju Chen School of Engineering Newcastle UniversityNewcastle Upon TyneUK Department of Oncology University of OxfordUK School of Dental Sciences Newcastle UniversityNewcastle Upon TyneUK

Bacterial attachment is a complex process affected by flow conditions,imparted stresses,and the surface properties and structure of both the supporting material and the *** on the initial attachment of cells of the bacterium Streptococcus gordonii(***),an important early coloniser of dental plaque,to samples of stainless steel(SS)have been reported in this *** primary aim motivating this study was to establish what affect,if any,the surface roughness and topology of samples of SS would have on the initial attachment of cells of the bacterium *** material and bacterium were chosen by virtue of their relevance to dental implants and dental implant *** to bacterial attachment,surfaces become conditioned by the interfacing environment(salivary pellicle from the oral cavity for instance).For this reason,cell attachment to samples of SS pre-coated with saliva was also *** implementing the Extended Derjaguin Landau Verwey and Overbeek(XDLVO)theory coupled with convection-diffusion-reaction equations and the surface roughness information,a computational model was developed to help better understand the physics of cell *** roughness was modelled by reconstructing the surface topography using statistical parameters derived from atomic force microscopy(AFM)*** this computational model,the effects of roughness and surface patterns on bacterial attachment were examined quantitatively in both static and flowing fluid *** results have shown that rougher surfaces(within the sub-microscale)generally increase bacterial attachment in static fluid conditions which quantitatively agrees with experimental *** flow conditions,computational fluid dynamics(CFD)simulations predicted reduced convection-diffusion inside the channel which would act to decrease bacterial *** combined with surface roughness effects,the computational model also predicted that the surface top

关键词： Bacterial attachment XDLVO theory Computational modelling Surface topography Surface roughness

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A Robust Model for Translating Arabic Sign Language into Spoken Arabic Using Deep Learning

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Intelligent Automation & Soft Computing 2023年第8期37卷 2037-2057页

作者： Khalid M.O.Nahar ammar Almomani Nahlah Shatnawi Mohammad Alauthman Department of Computer Sciences Faculty of Information Technology and Computer SciencesYarmouk University-Irbid21163Jordan School of Computing Skyline University CollegeSharjahP.O.Box 1797United Arab Emirates IT-Department-Al-Huson University College Al-Balqa Applied UniversityP.O.Box 50IrbidJordan Department of Information Security Faculty of Information TechnologyUniversity of PetraAmmanJordan

This study presents a novel and innovative approach to auto-matically translating Arabic Sign Language(ATSL)into spoken *** proposed solution utilizes a deep learning-based classification approach and the transfer learning technique to retrain 12 image recognition *** image-based translation method maps sign language gestures to corre-sponding letters or words using distance measures and classification as a machine learning *** results show that the proposed model is more accurate and faster than traditional image-based models in classifying Arabic-language signs,with a translation accuracy of 93.7%.This research makes a significant contribution to the field of *** offers a practical solution for improving communication for individuals with special needs,such as the deaf and mute *** work demonstrates the potential of deep learning techniques in translating sign language into natural language and highlights the importance of ATSL in facilitating communication for individuals with disabilities.

关键词： Sign language deep learning transfer learning machine learning automatic translation of sign language natural language processing Arabic sign language

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An Anti-overload Model for Openstack Based on Effective Dynamic Migration.

An Anti-overload Model for Openstack Based on Effective Dyna...

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作者： ammar Mohammed Al_Moalmi 湖南大学

学位级别：硕士

作为一种新兴技术,云计算对信息技术行业产生了巨大变革,并持续受到来自公共领域和私营领域的关注。随着这种技术的不断发展及广泛应用,保持其诸如服务质量(QoS)和服务等级协议(SLA)的性能是很重要的。这也是我们选择云计算提供商的一... 详细信息

作为一种新兴技术,云计算对信息技术行业产生了巨大变革,并持续受到来自公共领域和私营领域的关注。随着这种技术的不断发展及广泛应用,保持其诸如服务质量(QoS)和服务等级协议(SLA)的性能是很重要的。这也是我们选择云计算提供商的一个重要参考依据。虚拟机迁移是改善虚拟机过度整合的一种主要手段,其中过度整合可能会导致应用性能下降。本文提出一种支持基础设施即服务(IaaS)和可以避免物理机过载的动态在线迁移技术。这种技术有助于快速发展的、主流的开源云平台OpenStack性能的改善。通过对OpenStack的深入研究,其核心组件帮助我们对过量负载比例进行观察。观察发现,需要一种考虑开销的动态虚拟机迁移的技术来减少过量负载导致的问题并且可以适时提高Qos及SLA的性能。本文使用单指数平滑算法来估计物理服务器在下一阶段的负载。进一步,我们提出了一种有效的基于自适应阈值策略的分布式策略,并且该策略适合易变的工作集环境。分布在本地主机上的算法可以有效地进行检测并防止过度负载,然后使用阈值策略选择合适的虚拟机来保持低负载。此外,提出了一种不同以往的运行在控制节点的算法,该算法可以有效地将虚拟机分配到负载最小的目标物理机上。这个工作有助于Openstack云平台提供包括管理及资源分发方面的改进,并符合可扩展管理目标。本方案的实现包括：分布式算法,负载获取组件及监控组件。试验结果表明我们的系统可以在合适的时候避免过载,并且仿真结果表明我们的方法在减少SLA违反及降低虚拟机迁移次数上面能够取得很好的效果。

关键词：云计算虚拟化 OpenStack 在线迁移

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1-MCP Regulates Ethanol Fermentation and GABA Shunt Pathway Involved in Kiwifruit Quality During Postharvest Storage

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Horticultural Plant Journal 2021年第1期7卷 23-30页

作者： Maratab Ali Muhammad ammar Raza Shenge Li Lichao Zhou Chen Huan Shen Shuling Xiaolin Zheng College of Food Science and Biotechnology Key Laboratory of Fruits and Vegetables Postharvest and Processing Technology Research of Zhejiang ProvinceZhejiang Gongshang UniversityHangzhou 310018China National Institute of Food Science and Technology Faculty of FoodNutrition and Home SciencesUniversity of AgricultureFaisalabad 38800Pakistan Fruit Professional Cooperative of Huaji Shan in Linhai City LinhaiZhejiang 317000China

Kiwifruit(Actinidia deliciosa)‘Bruno’is prone to accumulate ethanol rapidly after respiratory climacteric during storage at ambient conditions without stresses,which causes quality deterioration of the fruit associated with alcohol *** maintaining the postharvest quality of kiwifruit‘Bruno’,the effects of 1.0μL•L^−11-methylcyclopropene(1-MCP)treatment on regulating the ethanol fermentation andγ-aminobutyric acid(GABA)shunt pathway associated with control of alcohol off-flavor were investigated during storage at room temperature(24±1)°C for 27 *** results showed that 1-MCP treatment significantly reduced the respiration rate,ethylene production,decay rate,ascorbic acid(AsA)loss,and delayed the decline in the firmness and titratable acidity(TA),and the increase in total soluble solid(TSS)in ***,1-MCP treatment effectively inhibited the increases in contents of acetaldehyde,ethanol,and GABA along with the suppressed activities of key enzymes involved in ethanol fermentation and GABA shunt pathway,such as pyruvate decarboxylase(PDC),alcohol dehydrogenase(ADH),glutamate decarboxylase(GAD),and GABA-transaminase(GABA-T)in kiwifruit during *** conclusion,1-MCP treatment efficiently regulated the ethanol fermentation and GABA shunt pathway by delaying the ripening process to avoid the alcohol off-flavor development,thereby contributed to maintaining the quality of the kiwifruit.

关键词： kiwifruit ethanol fermentation GABA shunt pathway 1-methylcyclopropene quality

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Vascular complications of pancreatitis

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World Journal of Clinical Cases 2022年第22期10卷 7665-7673页

作者： M ammar Kalas Monica Leon Luis Omar Chavez Eduardo Canalizo Salim Surani Department of Medicine Texas Tech University Health CenterEl PasoTX 79905United States Department of General Surgery Centro Medico ABCCiudad de Mexico 01120Mexico Department of Medicine Texas A&M UniversityBryanTX 77807United States

More than 200000 hospital admissions happen per year for acute pancreatitis and more than 50000 for chronic pancreatitis in the United States of *** pancreatitis accounts for 20%-30%of the ***-quarter of the patients with pancreatitis develop vascular complications,which carries a high *** mini-review will address these complications that can help primary care physicians and hospitalists in managing their patients effectively.

关键词： Acute pancreatitis Vascular complications Gastrointestinal bleeding Pseudoaneurysm Hemosuccus pancreaticus Pancreas

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Protoscolicidal and immunomodulatory activity of Ziziphora tenuior extract and its fractions

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Asian Pacific Journal of Tropical Medicine 2016年第11期9卷 1040-1046页

作者： Mojtaba Shahnazi Abbas Azadmehr ammar Andalibian Reza Hajiaghaee Mehrzad Saraei Mahmood Alipour Department of Parasitology Qazvin University of Medical Sciences Cellular&Molecular Research Institute Qazvin University of Medical Sciences Department of Immunology Babol University of Medical Sciences Department of Pharmacognosy& Pharmaceutics Department of Medicinal Plants Research Center Institute of Medicinal Plants ACECR Department of Social Medicine Qazvin University of Medical Sciences

Objective:To evaluate the scolicidal and immunomodulatory effect of the Ziziphora tenuior(***) extract and its ***:Protoscolices were treated with six concentrations(3,5,10,25,50,and 100 mg/mL) of *** extract and its fractions(ethanol,petroleum ether,ethyl acetate and chloroform) in periods of 10,20,30,40,50 and 60 minutes,and viability of protoscolices was evaluated using the 1.0%*** examine the immunomodulatory effects of Ziziphora and its fractions on macrophage cells,the non-toxic concentration of extract and different fractions determined by MTT assay,and the Griess reaction was used to measure the level of nitrite as an indicator of nitric oxide by the macrophage cells in 10,100 and 200 μg/mL in 24 hours at 37 ℃.Results:In this study,the *** extract at 10 mg/mL concentration was able to kill all protoscolices during 20 *** increasing the concentration to 25 mg/mL,the scolicidal time reduced to 10 *** the effect of different fractions of ***,the ethanolic fraction showed the highest scolicidal *** extract demonstrated an inhibitory effect on the activity of macrophages and reduced nitric oxide *** the petroleum ether and ethanolic fractions of the extract reduced nitric oxide production,nevertheless,this effect was only significant at 10 and 100 ug/mL concentrations(P<0.05).Conclusion:The *** extract and its fractions were effective against protoscolices yet the effect of total extract was *** findings indicates that the extract and its ethanolic and petroleum ether fractions could have anti-inflammatory properties.

关键词： Hydatid cyst Protoscolicidal Ziziphora tenuior Immunomodulatory Macrophage Nitric oxide Fraction

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An Optimized Algorithm for D2D-MIMO 5G Wireless Networks

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Computers, Materials & Continua 2021年第9期68卷 3029-3044页

作者： Shahid Bashir Imran Khan Fahd NAl-Wesabi Nadhem Nemri ammar Zahary Quang Ngoc Nguyen 无 Department of Business Studies Namal UniversityPakistan Department of Electrical Engineering University of Engineering and Technology PeshawarPakistan Department of Computer Science King Khalid UniversityMuhayel AseerKSA Faculty of Computer and IT Sana’a UniversitySana’aYemen Department of Communications and Computer Engineering Faculty of Science and Engineering Waseda University Shinjuku-kuTokyo169-0051Japan

The device-to-device(D2D)networking technology is extended to the conventional cellular network to boost the communication efficiency of the entire network,forming a heterogeneous 5G and beyond(B5G)communication network.D2D communication in a cellular cell will boost the efficiency of the spectrum,increase the ability of the device,and reduce the communication burden of base stations through the sharing of approved cell resources,causing serious interference as *** device-to-device(D2D)networking technology is extended to the conventional cellular network to boost the communication efficiency of the entire network,forming a heterogeneous 5G communication network.D2D communication in a cellular cell will boost the efficiency of the spectrum,increase the ability of the device,and reduce the communication burden of base stations through the sharing of approved cell resources,causing serious interference as *** paper proposes an efficient algorithm to minimize interference,based on the parity of the number of antennas,to resolve this *** primary concept is to generate the cellular connection precoding matrix by minimizing the power of interference from the base station to non-targeted *** through the criterion of maximum SINR,the interference suppression matrix of the cellular connection is ***,by removing intra-interference through linear interference alignment,the maximum degree of freedom is *** results of the simulation show that the proposed algorithm efficiently increases the performance of the spectrum,decreases interference,improves the degrees of freedom and energy efficiency compared to current algorithms.

关键词： 5G and beyond(B5G)networks device-to-device heterogeneous interference multiple-input and multiple-output

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An Optimized Algorithm for Resource Allocation for D2D in Heterogeneous Networks

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Computers, Materials & Continua 2022年第2期70卷 2923-2936页

作者： Abdul Kadir Hamid Fahd N.Al-Wesabi Nadhem Nemri ammar Zahary Imran Khan Department of Electrical&Computer Engineering University of SharjahSharjahUnited Arab Emirates Department of Computer Science King Khalid UniversityMuhayel AseerKSA Faculty of Computer and IT Sana’a UniversitySanaaYemen Department of Information Systems King Khalid UniversityMayahel AseerKSA Department of Electrical Engineering University of Engineering and TechnologyPeshawarPaki

With the emergence of 5G mobile multimedia services,end users’demand for high-speed,low-latency mobile communication network access is *** them,the device-to-device(D2D)communication is one of the considerable *** D2D communication,the data does not need to be relayed and forwarded by the base station,but under the control of the base station,a direct local link is allowed between two adjacent mobile *** flexible communicationmode reduces the processing bottlenecks and coverage blind spots of the base station,and can be widely used in dense user communication scenarios such as heterogeneous ultra-dense wireless *** of the important factors which affects the quality-of-service(QoS)of D2D communications is co-channel *** order to solve this problem of co-channel interference,this paper proposes a graph coloring based *** main idea is to utilize the weighted priority of spectrum resources and enables multiple D2D users to reuse the single cellular user *** proposed algorithm also provides simpler power *** heterogeneous pattern of interference is determined using different types of interferences and UE and the priority of color is *** results show that the proposed algorithm effectively reduced the co-channel interference,power consumption and improved the system throughput as compared with existing algorithms.

关键词： 5G device-to-device communication wireless networks spectrum

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Identification of suitable sites for rainwater harvesting structures in arid and semi-arid regions:A review

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International Soil and Water Conservation Research 2016年第2期4卷 108-120页

作者： ammar Adham Michel Riksen Mohamed Ouessar Coen Ritsema Wageningen University Soil Physics and Land Management Group476700 AA WageningenThe Netherlands Institut des Régions Arides Route de Djorf km 22.54119 MedenineTunisia University of Anbar RamadiIraq

Harvested rainwater is an alternative source of water in arid and semi-arid regions(ASARs)around the *** researchers have developed and applied various methodologies and criteria to identify suitable sites and techniques for rainwater harvesting(RWH).Determining the best method or guidelines for site selection,however,is *** main objective of this study was to define a general method for selecting suitable RWH sites in ASARs by assembling an inventory of the main methods and criteria developed during the last three *** categorised and compared four main methodologies of site selection from 48 studies published in scientific journals,reports of international organisations,or sources of information obtained from *** then identified three main sets of criteria for selecting RWH locations and the main characteristics of the most common RWH techniques used in *** methods were diverse,ranging from those based only on biophysical criteria to more integrated approaches including socio-economic criteria,especially after *** most important criteria for the selection of suitable sites for RWH were slope,land use/cover,soil type,rainfall,distance to settlements/streams,and *** success rate of RWH projects tended to increase when these criteria were considered,but an objective evaluation of these selection methods is still *** studies now select RHW sites using geographic information systems in combination with hydrological models and multi-criteria analysis.

关键词： Arid and semi-arid regions RWH Suitability Multi-criteria GIS Modelling

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The prevalence,characteristics and outcome of seizure in tuberculous meningitis

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Acta Epileptologica 2020年第1期2卷 1-9页

作者： ammar Taha Abdullah Abdulaziz Jinmei Li Dong Zhou Department of Neurology West China HospitalSichuan University37 Guo Xue Xiang stChengdu 610041China. Faculty of Brain Sciences UCL Queen Square Institute of NeurologyLondon WC1N 3BGUK.

Seizures are a common finding in patients with tuberculous meningitis(TBM),and associate with four times increased risk of death and neurological disability,especially in *** has been reported that brain inflammation,diffuse neuronal injury,and reactive gliosis may all contribute to the pathogenesis of seizures in *** seizure onset may be associated with meningeal irritation and cerebral oedema;while,the late seizures are usually due to infarction,hydrocephalus,tuberculoma and paradoxical ***,recurrent uncontrolled seizures can evolve to status epileptics resulting in an increased risk of chronic epilepsy and poor ***,this review aimed to assess the frequency of seizures in patients with TBM,and discuss the etiologies,mechanisms,and characteristics of seizures in ***,we have searched the literature to identify the prognostic factors for chronic epilepsy after TBM.

关键词： Seizure Tuberculous meningitis Neuronal injury Epilepsy

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