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Alternative Strategy for Development of Dielectric Calcium Copper Titanate‑Based Electrolytes for Low‑Temperature Solid Oxide Fuel Cells

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Nano-Micro Letters 2025年第1期17卷 310-332页

作者： Sajid Rauf Muhammad Bilal Hanif Zuhra Tayyab Matej Veis MAKYousaf shah Naveed Mushtaq Dmitry Medvedev Yibin Tian Chen Xia Martin Motola Bin Zhu College of Mechatronics and Control Engineering Shenzhen UniversityShenzhen 518060People’s Republic of China Department of Inorganic Chemistry Faculty of Natural SciencesComenius University BratislavaIlkovicova684215 BratislavaSlovakia Energy Storage Joint Research Center School of Energy and EnvironmentSoutheast UniversityNanjing 210096People’s Republic of China Hydrogen Energy Laboratory Ural Federal University620002 EkaterinburgRussia Laboratory of Electrochemical Devices Based on Solid Oxide Proton Electrolytes Institute of High Temperature Electrochemistry620066 EkaterinburgRussia School of Microelectronics Hubei UniversityWuhan 430062People’s Republic of China

The development of low-temperature solid oxide fuel cells(LT-SOFCs)is of significant importance for realizing the widespread application of *** has stimulated a substantial materials research effort in developing high oxide-ion conductivity in the electrolyte layer of *** this context,for the first time,a dielectric material,CaCu_(3)Ti_(4)O_(12)(CCTO)is designed for LT-SOFCs electrolyte application in this *** individual CCTO and its heterostructure materials with a p-type Ni_(0.8)Co_(0.15)Al_(0.05)LiO_(2−δ)(NCAL)semiconductor are evaluated as alternative electrolytes in LT-SOFC at 450–550℃.The single cell with the individual CCTO electrolyte exhibits a power output of approximately 263 mW cm^(-2) and an open-circuit voltage(OCV)of 0.95 V at 550℃,while the cell with the CCTO–NCAL heterostructure electrolyte capably delivers an improved power output of approximately 605 mW cm^(-2) along with a higher OCV over 1.0 V,which indicates the introduction of high hole-conducting NCAL into the CCTO could enhance the cell performance rather than inducing any potential short-circuiting *** is found that these promising outcomes are due to the interplay of the dielectric material,its structure,and overall properties that led to improve electrochemical mechanism in CCTO–***,density functional theory calculations provide the detailed information about the electronic and structural properties of the CCTO and NCAL and their heterostructure CCTO–*** study thus provides a new approach for developing new advanced electrolytes for LT-SOFCs.

关键词： LT-SOFCs Dielectric CaCu_(3)Ti_(4)O_(12) Semiconductor Ni_(0.8)Co_(0.15)Al_(0.05)LiO_(2−δ) Ionic conductivity Heterostructure electrolyte

Optimizing Optical Fiber Faults Detection:A Comparative Analysis of Advanced Machine Learning Approaches

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Computers, Materials & Continua 2024年第5期79卷 2697-2721页

作者： kamlesh Kumar Soothar Yuanxiang Chen Arif Hussain Magsi Cong Hu Hussain shah School of Electronics Engineering Beijing University of Posts and TelecommunicationsBeijing100876China State Key Laboratory of Integrated Services Networks Xidian UniversityXi’an710071China State Key Laboratory ofNetworking and Switching Technology Beijing University of Posts and TelecommunicationsBeijing100876China

Efficient optical network management poses significant importance in backhaul and access network communicationfor preventing service disruptions and ensuring Quality of Service(QoS)*** emerging faultsin optical networks introduce challenges that can jeopardize the network with a variety of *** existingliterature witnessed various partial or inadequate *** the other hand,Machine Learning(ML)hasrevolutionized as a promising technique for fault detection and *** traditional fault managementsystems,this research has three-fold ***,this research leverages the ML and Deep Learning(DL)multi-classification system and evaluates their accuracy in detecting six distinct fault types,including fiber cut,fibereavesdropping,splicing,bad connector,bending,and PC ***,this paper assesses the classificationdelay of each classification ***,this work proposes a fiber optics fault prevention algorithm thatdetermines to mitigate the faults *** work utilized a publicly available fiber optics dataset namedOTDR_Data and applied different ML classifiers,such as Gaussian Naive Bayes(GNB),Logistic Regression(LR),Support Vector Machine(SVM),K-Nearest Neighbor(KNN),Random Forest(RF),and Decision Tree(DT).Moreover,Ensemble Learning(EL)techniques are applied to evaluate the accuracy of various *** addition,this work evaluated the performance of DL-based Convolutional Neural Network and Long-Short Term Memory(CNN-LSTM)hybrid *** findings reveal that the CNN-LSTM hybrid technique achieved the highestaccuracy of 99%with a delay of 360 *** the other hand,EL techniques improved the accuracy in detecting fiberoptic ***,this research comprehensively assesses accuracy and delay metrics for various classifiers andproposes the most efficient attack detection system in fiber optics.

关键词： Fiber optics fault detection multiclassification machine learning ensemble learning

Restless head syndrome:A retrospective study

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World Journal of Methodology 2025年第1期15卷 51-59页

作者： Sanjay Prakash Varoon Vadodaria Niraj Chawda Chetsi S shah Anurag Prakash Department of Neurology Smt.B.K.Shah Medical Institute and Research CentreSumandeep VidyapeethVadodara 391760GujarātIndia Department of Medicine Smt.B.K.Shah Medical Institute and Research CentreSumandeep VidyapeethVadodara 391760GujarātIndia Department of Medicine Parul Institute of Medical Sciences and Research CentreParul University WaghodiaVadodara 391760India

BACKGROUND Restless legs syndrome(RLS)is characterized by an urge to move with an unpleasant sensation in the lower *** typically affects the ***,it can also affect several other body regions,such as the arms,abdomen,face,neck,head,and genital *** are only a few reports of the RLS variant affecting the *** To assess the epidemiological,clinical,and other aspects of the RLS variant affecting the *** We conducted a retrospective study of 17 adult patients(>18 years)who met the RLS criteria and simultaneously experienced RLS-like symptoms in the *** The median age at which symptoms appeared was 41.6 *** and females were equally affected(1.1:1).All 17 patients had uncomfortable sensations in the lower *** or disturbed sleep was the most common comorbidity(n=16,88.2%).However,headache was the most common presenting or primary symptom(n=10,70.5%).Dizziness or an abnormal sensation in the head was the second most common presenting symptom(5 patients,29.4%).Other presenting features were leg pain,backache,and generalized body *** patients responded favorably to dopaminergic *** If RLS-related unpleasant sensations and pain are felt in the head,they may be misinterpreted as headache,dizziness,or psychosomatic *** and headaches in a subset of patients may be two phenotypic manifestations of the same disorder.

关键词： Restless legs syndrome Restless head syndrome Dopamine Headache Migraine Tension-type headache

Macular microvascular and structural changes on optical coherence tomography angiography in atypical optic neuritis

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World Journal of Methodology 2025年第1期15卷 88-94页

作者： Chinmay Mahatme Madhurima Kaushik Veerappan Rathinasabapathy Saravanan Karthik Kumar Virna M shah Department of General Ophthalmology Aravind Eye HospitalCoimbatore 641014Tamil NāduIndia Department of Neuro-ophthalmology Aravind Eye HospitalCoimbatore 641014Tamil NāduIndia Department of Vitreoretina Aravind Eye HospitalCoimbatore 641014Tamil NāduIndia

BACKGROUND Atypical optic neuritis,consisting of neuromyelitis optica spectrum disorders(NMOSD)or myelin oligodendrocyte glycoprotein antibody disease(MOGAD),has a very similar presentation but different prognostic implications and longterm management *** and metabolic factors are being thought to play a role in such autoimmune neuro-inflammatory disorders,apart from the obvious immune mediated *** the advent of optical coherence tomography angiography(OCTA),it is easy to pick up on these subclinical macular microvascular and structural *** To study the macular microvascular and structural changes on OCTA in atypical optic *** This observational cross-sectional study involved 8 NMOSD and 17 MOGAD patients,diagnosed serologically,as well as 10 healthy *** vascular density(MVD)and ganglion cell+inner plexiform layer thickness(GCIPL)were studied using *** There was a significant reduction in MVD in NMOSD and MOGAD affected as well as unaffected eyes when compared with healthy *** and MOGAD affected eyes had significant GCIPL thinning compared with healthy *** unaffected eyes did not show significant GCIPL thinning compared to healthy controls in contrast to MOGAD unaffected *** comparing NMOSD with MOGAD,there was no significant difference in terms of MVD or GCIPL in the affected or unaffected *** Although significant microvascular and structural changes are present on OCTA between atypical optic neuritis and normal patients,they could not help in differentiating between NMOSD and MOGAD cases.

关键词： Optical coherence tomography angiography Atypical optic neuritis Macular microvascular changes Neuromyelitis optica spectrum disorders Myelin oligodendrocyte glycoprotein antibody disorder

Comparative assessment of mechanical and chemical fluid diversion techniques during hydraulic fracturing in horizontal wells

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Petroleum Science 2023年第6期20卷 3582-3597页

作者： Maunish S.shah Subhash N.shah Drilling Cementingand Stimulation Research CenterDepartment of Petroleum EngineeringSchool of Energy TechnologyPandit Deendayal Energy UniversityRaisanGandhinagarGujaratIndia Mewbourne School of Petroleum and Geological Engineering The University of OklahomaNormanOKUSA

The application of fluid diversion during hydraulic fracturing is an evolving technology and has become popular amongst E&P operators over the past few *** primary objective of the fluid diversion is to improve hydraulic fracturing treatment by increasing stimulated reservoir volume and improving hydrocarbon *** is possible by achieving any of the following objectives:creating uniform distribution of treatment slurry within the target zone;treating unstimulated and under-stimulated zones;or by increasing fracture density by creating a complex fracture *** fluid diversion application is also helpful in decreasing the number of stages(by increasing stage length)for multi-stage plug-n-perf(PnP)fracturing *** is also applied to prevent fracture-driven interactions between adjacent wells,which is currently a major issue,especially in *** addition,for successful refracturing treatment,the diverter application is essential for isolating the existing fractures and redirecting the treatment slurry to the desired unstimulated *** diversion methods can be broadly categorized into the mechanical and chemical *** established mechanical diversion techniques are frac plugs,expandable casing patches,expandable liners,swellable packers,straddle packer assembly,sand plugs,frac sleeves,perforation ball sealers,and limited entry *** different chemical diversion techniques are particulates,fibers,gels,surfactants,perforation pods,and composite *** paper describes the current status of established mechanical and chemical diverter technologies and examines their comparative advantages and *** techniques are suitable for diverter application,but the technique is selected based on the desired objective and conditions of the wellbore and *** general guidelines for selecting diversion techniques and operational considerations are also provided in the *** diagnosis of diversion treatme

关键词： Fluid diversion Diverter Diverting agents Multi-stage fracturing Hydraulic fracturing Horizontal well

Effect of transverse compression on the residual tensile strength of ultrahigh molecular weight polyethylene(Dyneema~? SK-76) yarns

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Defence Technology（防务技术） 2020年第1期16卷 35-42页

作者： Karan shah Subramani Sockalingam McNAIR Center for Aerospace Innovation and Research University of South CarolinaSCUSA Department of Mechanical Engineering University of South CarolinaSCUSA

Ballistic impact induces complex stress states on fiber-based armor *** impact fibers undergo multiaxial loading which includes axial tension,axial compression,transverse compression,and transverse *** co mpression induced by the projectile leads to permanent defo rmation and fibrillation of fibers resulting in degradation of material tensile *** work(Sockalingam et *** Res.J 2018) has shown a reduction of 20% in the tensile strength of Dyneema~? SK76 single fibers subjectet to 77% nominal transverse compressive *** investigation of quasistatic transverse compression on Dyneema~? SK-76 yarns,unconstrained in the lateral direction,indicate an average of 4% reduction in tensile strength of yarns compressed to 77% nominal *** this work we use finite element modeling techniques to understand the difference in residual tensile strength between single fibers and yarns observed in laterally unconstrained transverse compression *** element study of the transverse compression response of single fibers and yarns indicate that local strains developed in fibers within the yarn are much lower than the local strains developed in single fibers subjected to a given nominal strain and may explain the less reduction in strength observed in yarns.

关键词： Polymer fibers Compression Tensile strength

Micro-invasive glaucoma surgery – an interventional glaucoma revolution

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Eye and Vision 2019年第1期6卷 242-246页

作者： Manjool shah Department of Ophthalmology and Visual Sciences Kellogg Eye CenterUniversity of Michigan1000 Wall StreetAnn ArborMI 48105USA

The glaucoma surgical landscape has changed dramatically over the last decade with the introduction and integration of micro-invasive glaucoma surgery(MIGS)*** modalities target physiologic outflow pathways or optimize previously utilized glaucoma surgical methods in order to deliver safety,efficacy,and individualized care to the *** techniques can be classified based on anatomical location as well as method of intraocular pressure(IOP)*** review will focus on MIGS optimizing the conventional outflow pathway via intervention at Schlemm’s canal,MIGS optimizing the uveoscleral outflow pathway via suprachoroidal shunting,and MIGS optimizing the transscleral or subconjunctival outflow pathway which has long been utilized by glaucoma surgeons performing traditional filtration *** wide array of currently available MIGS modalities can be staggering to the glaucoma care provider,but an understanding of the landscape and the large classes of interventional strategies can allow for clinical decision making based on the specifics of the patient’s needs and the pathophysiology of their disease.

关键词： Micro-invasive glaucoma surgery Glaucoma Individualized care Glaucoma surgery

Privacy preserving secure expansive aggregation with malicious node identification in linear wireless sensor networks

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Frontiers of Computer Science 2021年第6期15卷 155-163页

作者： Kaushal shah Devesh JINWALA Assistant Professor Computer EngineeringPandit Deendayal Energy UniversityGandhinagar 382007India Professor Computer EngineeringSardar Vallabhbhai National Institute of TechnologySurat 395007India

The Wireless Sensor Networks(WSNs)used for the monitoring applications like pipelines carrying oil,water,and gas;perimeter surveillance;border monitoring;and subway tunnel monitoring form ***,the infrastructure being monitored inherently forms linearity(straight line through the placement of sensor nodes).Therefore,suchWSNs are called linear *** applications are security critical because the data being communicated can be used for malicious *** contemporary research of WSNs data security cannot fit in directly to linear WSN as only by capturing few nodes,the adversary can disrupt the entire service of linear ***,we propose a data aggregation scheme that takes care of privacy,confidentiality,and integrity of *** addition,the scheme is resilient against node capture attack and collusion *** are several schemes detecting the malicious ***,the proposed scheme also provides an identification of malicious nodes with lesser key storage ***,we provide an analysis of communication cost regarding the number of messages being *** the best of our knowledge,the proposed data aggregation scheme is the first lightweight scheme that achieves privacy and verification of data,resistance against node capture and collusion attacks,and malicious node identification in linear WSNs.

关键词： linear wireless sensor networks secure data aggregation privacy malicious node identification

Quantum chemical investigation on photodegradation mechanisms of sulfamethoxypyridazine with dissolved inorganic matter and hydroxyl radical

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Journal of Environmental Sciences 2017年第7期29卷 85-92页

作者： shaheen shah Ce Hao State Key Laboratory of Fine Chemicals Dalian University of TechnologyDalian 116024China Department of Chemistry Karakorum International UniversityGilgit-Baitistan 15100Pakistan

Sulfamethoxypyridazine（SMP） is one of the commonly used sulfonamide antibiotics（SAs）.SAs are mainly studied to undergo triplet-sensitized photodegradation in water under natural sunlight with other coexisting aquatic environmental organic *** this work,SMP was selected as a representative of *** studied the mechanisms of triplet-sensitized photodegradation of SMP and the influence of selected dissolved inorganic matter,i.e.,anions（Br^-,Cl^-,and NO^-_3） and cations ions（Ca^（2＋）,Mg^（2＋）,and Zn^（2＋）） on SMP photodegradation mechanism by quantum chemical *** addition,the degradation mechanisms of SMP by hydroxyl radical（OH·） were also *** creation of SO_2 extrusion product was accessed with two different energy pathways（pathway-1 and pathway-2） by following two steps（step-I and step-II） in the tripletsensitized photodegradation of *** to low activation energy,the pathway-1 was considered as the main pathway to obtain SO_2 extrusion ***-II of pathway-1 was measured to be the rate-limiting step（RLS） of SMP photodegradation mechanism and the effect of the selected anions and cations was estimated for this *** selected anions and cations promoted photodegradation of SMP by dropping the activation energy of *** estimated low activation energies of different degradation pathways of SMP with OH·radical indicate that OH·radical is a very powerful oxidizing agent for SMP degradation via attack through benzene derivative and pyridazine derivative ring.

关键词： Sulfamethoxypyridazine Photodegradation mechanism Dissolved inorganic matter Hydroxyl radical DFT