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Nano-Enhanced Dairy Scum Biodiesel Blends:Unleashing the Power of Aluminium Oxide for Sustainable and Efficient Engine Performance

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Journal of Thermal Science 2025年第1期 283-302页

作者： Veeranna mODI Prasad B.RAmPURE Sunil Kumar SHETTY madeva NAGARAL Channa Keshava NAIK N Johar mGm muham.a. Irsyad abdullah abdullah I.AL-mANSOUR Shamshad ALAm KLE College of Engineering and Technology ChikodiVisvesvaraya Technological University Nitte (Deemed to be University) NMAM Institute of Technology (NMAMIT)Department of Mechanical Engineering Aircraft Research and Design Centre HAL Department of mechanical Engineering BGS College of Engineering and TechnologyBengaluruAffiliated to Visvesvaraya Technological University management and Science University Department of Civil Engineering College of EngineeringKing Saud University

This study investigates the effect of aluminium oxide nanoparticlesaddition to biodiesel blends made from dairy milk scum on performance and combustion characteristics of the diesel *** dispersion of Al2O3nanoparticles in B20 blends at different concentrations was done with the help of *** number of blends were prepared for the *** machine learning algorithms(Random Forest（RF）and CatBoost) was used for the *** results show that in com.a.ison to biodiesel blends without nanoparticles,the kinematic viscosity and density is higher for fuel blends with *** these Fuel blends have higher calorific *** blends exhibited reduced Brake Specific Fuel Consumption（BSFC） of2.85% than the blends without nano particles(Dairy Scum methyl Ester Biodiesel 20%+Neat Diesel 80%（in volume）,DSmEB20),57.14% less CO,40.8% less hydrocarbon,and increased NOxemissions com.a.ed to conventional diesel,contributing to the development of environmentally friendly and renewable biofuel blends with *** B20NP30 is the optimal blend for performance and emission *** study concludes with findings on enhanced Brake Thermal Efficiency（BTE） of 26.29% in 3×10-5（in volume） Al2O3nanoparticle-blended DSmE B20 and other DSmE B20 fuel blends,emphasizing the importance of optimal nanoparticle *** correlation matrix shows how engine load,efficiency m.a.ures（BTE,BSFC）,and emissions（CO,CO2,NOx,Smoke） are connected in complex *** results help us understand the complicated dynamics of engine performance and emission characteristics ***'s diagram for BTE and BSFC shows that CatBoost-based BTE models perform superior to RF-based models during the training as well as testing *** results were obtained for CO and CO2emission results.

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Decoding molecular mechanisms:brain aging and Alzheimer's disease

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Neural Regeneration Research 2025年第8期20卷 2279-2299页

作者： mahnoor Hayat Rafay Ali Syed Ham.a. Qaiser moham.a. Uzair Khalid Al-Regaiey Roaa Khallaf Lubna abdullah mohammed Albassam Im.a. Kaleem Xueyi Wang Ran Wang mehwish SBhatti Shahid Bashir Atta-ur-Rahman School of Applied Biosciences(ASAB) National University of Sciences and Technology(NUST)IslamabadPakistan Department of Biotechnology Quaid-i-Azam UniversityIslamabadPakistan Department of Biological Sciences Faculty of Basic&Applied SciencesInternational Islamic University Islamabad(IIUI)IslamabadPakistan Department of Bioengineering King Fahd University of Petroleum and MineralsDhahranSaudi Arabia Department of Physiology College of MedicineKing Saud UniversityRiyadhSaudi Arabia Department of Neurology Neuroscience CenterKing Fahad Specialist HospitalDammamSaudi Arabia Department of mental Health Neuroscience CenterKing Fahad Specialist HospitalDammamSaudi Arabia Department of Biosciences Commission on Science and Technology for Sustainable Development in the South(COMSATS University)IslamabadPakistan Department of Psychiatry The First Hospital of Hebei Medical UniversityShijiazhuangHebei ProvinceChina mental Health Institute of Hebei medical University ShijiazhuangHebei ProvinceChina Department of Neurobiology and Behavior University of CaliforniaIrvineCAUSA Neuroscience Center King Fahad Specialist Hospital DammamDammamSaudi Arabia

The complex morphological,anatomical,physiological,and chemical mechanisms within the aging brain have been the hot topic of research for *** aging process alters the brain structure that affects functions and cognitions,but the worsening of such processes contributes to the pathogenesis of neurodegenerative disorders,such as Alzheimer's *** these observable,mild morphological shifts,significant functional modifications in neurotransmission and neuronal activity critically influence the aging *** these changes is important for maintaining cognitive health,especially given the increasing prevalence of age-related conditions that affect *** review aims to explore the age-induced changes in brain plasticity and molecular processes,differentiating normal aging from the pathogenesis of Alzheimer's disease,thereby providing insights into predicting the risk of dementia,particularly Alzheimer's disease.

关键词： Alzheimer’s disease brain aging cognitive health dementia molecular mechanisms neuronal activity neuroplasticity neurotransmission

A Secure and Efficient Cluster-Based Authentication Scheme for Internet of Things(IoTs)

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Computers, materials & Continua 2022年第1期70卷 1033-1052页

作者： Kanwal Im.a. Nasreen Anjum abdullah Alghamdi Asadullah Shaikh mohammed hamdi Saeed mahfooz Department of Computer Science University of PeshawarPeshawar25121Pakistan Department of Informatics King’s College LondonLondonSE59RJUK College of Computer Science and Information Systems Najran UniversityNajran61441Saudi Arabia

IPv6 over Low PowerWireless Personal Area Network(6LoWPAN)provides IP connectivity to the highly constrained nodes in the Internet of Things(IoTs).6LoWPANallows nodeswith limited battery power and storage capacity to carry IPv6 datagrams over the lossy and error-prone radio links offered by the IEEE 802.15.4 standard,thus acting as an adoption layer between the IPv6 protocol and IEEE 802.15.4 *** data link layer of IEEE 802.15.4 in 6LoWPAN is based on AES(Advanced Encryption Standard),but the 6LoWPANstandard lacks and has omitted the security and privacy requirements at higher *** sensor nodes in 6LoWPANcan join the network without requiring the authentication ***,from security perspectives,6LoWPAN is vulnerable to many attacks such as replay attack,man-in-the-middle attack,Impersonation attack,and modification *** paper proposes a secure and efficient cluster-based authentication scheme(CBAS)for highly constrained sensor nodes in *** this approach,sensor nodes are organized into a cluster and communicate with the central network through a dedicated sensor *** main objective of CBAS is to provide efficient and authentic communication among the 6LoWPAN *** ensure the low signaling overhead during the registration,authentication,and handover procedures,we also introduce lightweight and efficient registration,de-registration,initial authentication,and handover procedures,when a sensor node or group of sensor nodes join or leave a *** security analysis shows that the proposed CBAS approach protects against various security attacks,including Identity Confidentiality attack,modification attack,Replay attack,man-in-the-middle attack,and Impersonation *** simulation experiments show that CBAS has reduced the registration delay by 11%,handoff authentication delay by 32%,and signaling cost by 37%com.a.ed to the SGmS(Secure Groupmobility Scheme)and LAmS(Light-Wight Authentication&mobility Scheme).

关键词： IoT cyber security security attacks authentication delay handover delay signaling cost 6LoWPAN

Couple stress and Darcy Forchheimer hybrid nanofluid flow on a vertical plate by m.a.s of double diffusion Cattaneo-Christov analysis

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Chinese Physics B 2023年第4期32卷 142-150页

作者： hamdi Ayed Department of Civil Engineering College of EngineeringKing Khalid UniversityAbha 61421Kingdom of Saudi Arabia Higher Institute of Transport and Logistics of Sousse University of SousseSousse 4023Tunisia

A three-dimensional Darcy Forchheimer mixed convective flow of a couple stress hybrid nanofluid flow through a vertical plate by m.a.s of the double diffusion Cattaneo-Christov model is presented in this *** influence of highorder velocity slip flow,as well as a passive and active control,is also *** motive of the research is to develop a computational model,using cobalt ferrite(Co Fe_(2)O_(4))and copper(Cu)nanoparticles(NPs)in the carrier fluid water,to magnify the energy and mass communication rate and boost the efficiency and performance of thermal energy conduction for a variety of commercial and biological *** proposed model becomes more significant,with an additional effect of non-Fick's mass flux and Fourier's heat model to report the energy and mass passage *** results are obtained through the computational strategy parametric continuation *** figures are plotted to reveal the physical sketch of the obtained solution,while the statistical assessment has been evaluated through *** has been observed that the dispersion of Cu and Co Fe_(2)O_(4)NPs to the base fluid significantly enhances the velocity and thermal conductivity of water,which is the most remarkable property of these NPs from the industrial point of view.

关键词： hybrid nanofluid high order slip couple stress fluid non-Fourier's heat and mass flux Darcy Forchheimer effect

Experimental evidence of magnetic training effect of electronic phase in Nd-Ca half-doped manganite

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Journal of Rare Earths 2020年第10期38卷 1076-1085,I0002页

作者： hamdi Trabelsi Corresponding author.E-mail address:hamdi.trabelsi@outlook.fr.Department of Physics Faculty of SciencesSfax UniversitySfax3000Tunisia

Cooling and heating modes are shown to be able to significantly modify the magnetic and electrical properties of the half-doped perovskite *** present paper reports on a precise investigation of this phenomenon(the so-called training effect) carried out on Nd0.5Ca0.5mnO3 manganite,which allow a fine tuning of the magnetic ground *** of the X-ray diffraction pattern shows that the synthesized sample is single phase and crystallizes in the orthorhombic structure with Pnma space *** magnetometry m.a.urements,we have found that the sample is the seat of interesting phenomena like charge ordering,magnetic phase separation,spin-glass and inverse magnetocaloric ***-field-driven magnetization(m(μ0 H)) m.a.urements evidence the metamagnetic transition which not only depends on field value,but also on the thermal process(cooling or heating).metamagnetic irreversibility in the magnetic field range(±5 T) and memory effect are observed at low temperatures due to the kinetic arrest *** is worthwhile to mention that the coercive field increases with decreasing temperature and reaches 955 Oe at 20 K,which is sufficiently large com.a.ed with that one in the soft magnetic and makes the material quite interesting for spintronic *** electrical resistivity in a zero field was m.a.ured on both cooling and warming modes,and the data obtained were fitted by using different theoretical *** low temperatures,the resistivity shows the presence of insulator-metal transition and is found to be in conformity with the magnetization data.A magnetic training effect due to the thermo-magnetic history dependent behavior is observed,where the resistivity is consistently irreversible.

关键词： Pechini method Charge-ordering Inverse magnetocaloric effect Kinetic arrest Training effect Electrical resistivity

An Architecture Supporting Intelligent mobile Healthcare Using Human-Computer Interaction HCI Principles

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Computer Systems Science & Engineering 2022年第2期40卷 557-569页

作者： mesfer Alrizq Shauban Ali Solangi abdullah Alghamdi muham.a. Ali Nizamani muham.a. Ali memon mohammed hamdi College of Computer Science and Information Systems Najran UniversityNajranSaudi Arabia Faculty of Engineering&Technology University of SindhJamshoro78060Pakistan

Recent advancements in the Internet of Things IoT and cloud computing have paved the way for mobile Healthcare(mHealthcare)services.A patient within the hospital is monitored by several ***,upon leaving the hospital,the patient can be remotely monitored whether directly using body wearable sensors or using a smartphone equipped with sensors to monitor different user-health *** raises potential challenges for intelligent monitoring of patient's *** this paper,an improved architecture for smart mHealthcare is proposed that is supported by HCI design *** HCI also provides the support for the User-Centric Design(UCD)for smart mHealthcare ***,the HCI along with IoT's(Internet of Things)5-layered architecture has the potential of improving User Experience(UX)in mHealthcare design and help saving *** intelligent mHealthcare system is supported by the IoT sensing and communication layers and health care providers are supported by the application layer for the medical,behavioral,and health-related *** care providers and users are further supported by an intelligent layer performing critical situation assessment and performing a multi-modal communication using an intelligent *** HCI design focuses on the ease-of-use,including user experience and safety,alarms,and error-resistant displays of the end-user,and improves user's experience and user satisfaction.

关键词： Human computer interaction mhealthcare user-centric design sensor network nternet-of-things

Correlation of the meishucunian Stage in South Asia

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Acta Geologica Sinica(English Edition) 1989年第1期63卷 1-9页

作者： m.D.Brasier B.hamdi Department of Geology University of Hull Hull Hu6 7RX England. Geological Survey of Iran P. O. Box 1964. Teheran Iran.

The determination of boundary points and their correlation are prerequisites for defining the PrecambrianCambrian boundary and the intercontinental correlation. A large number of good Precambrian-Cambrian boundary sections in South Asia not only possess the conditions for selection of a boundary stratotype, but also provide the basis for the long-distance correlation of those boundary sections.Through a detailed study of the latest data obtained from the typical sections in South China, the Lesser Himalaya mountains and the Alborz mountains. the locations of boundary points have been defined, and a correlation scheme is proposed, which contributes to the solution of the problem of worldwide correlation of boundary sections.

关键词： Correlation of the meishucunian Stage in South Asia

АГ-Convergence Result for Thin Curved Films Bonded to a Fixed Substrate with a Noninterpenetration Constraint

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Chinese Annals of mathematics,Series B 2006年第6期27卷 615-636页

作者： hamdi ZORGATI Institut Für mathematik Universitt Zürich Winterthurerstr190 CH-8057 ZürichSwitzerland.

The behavior of a thin curved hyperelastic film bonded to a fixed substrate is described by an energy composed of a nonlinearly hyperelastic energy term.a.d a debonding interracial energy term. The author computes the Г-limit of this energy under a noninterpenetration constraint that prohibits penetration of the film into the substrate without excluding contact between them.

关键词： Г-Convergence Thin curved films Noninterpenetration constraint

Removal of phosphate ions from.a.ueous solution using Tunisian clays minerals and synthetic zeolite

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Journal of Environmental Sciences 2012年第4期24卷 617-623页

作者： Noureddine hamdi Ezzeddine Srasra National Center of Research in materials Sciences Borj Cedria Technopole 95-2050Tunisia

Phosphate ions are usually considered to be responsible for the algal bloom in receiving water bodies and aesthetic problems in water. From the environmental point of view, the management of such contaminant and valuable resource is very important. The present work deals with the removal of phosphate ions from.a.ueous solutions using kaolinitic and smectic clay minerals and synthetic zeolite as adsorbent. The pH effect and adsorption kinetic were studied. It was found that phosphate could be efficiently removed at acidic pH （between 4 and 6） and the second order model of kinetics is more adopted for all samples. The isotherms of adsorption of phosphate ions by the two clays and the zeolite samples show that the zeolite has the highest rate of uptake （52.9 mg P/g）. Equilibrium data were well fitted with Langmuir and Freundlich isotherm.

关键词： phosphate adsorption clay mineral zeolite