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Experimental and numerical study of effecting core configurations on the static and dynamic behavior of honeycomb plate with aluminum material

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Defence Technology（防务技术） 2024年第9期39卷 177-192页

作者： Nehad Abid Allah Hamza Fatima Mohammed K.AL-Fatlwe Muna Ali talib Engineering College Al-Qasim Green University51013BabylonIraq Engineering Technical College of Al-Najaf Al-Furat Al-Awsat Technical University(ATU)Najaf54003Iraq

The sandwich panel incorporated a honeycomb core,a widely utilized composite structure recognized as a fundamental classification of composite *** a core resembling a honeycomb,possessing thickness and softness,and is flank by rigid face sheets that sandwich various shapes and *** paper presents an examination of the static and dynamic analysis of lightweight plates made of aluminum honeycomb sandwich *** sandwich plate samples are 300 mm long,and 300 mm wide,the heights of the core have been varied at four values ranging from 10 to 25 *** honeycomb core is manufactured from Aluminum material by using a novel technique namely resistance spot welding(RSW)instead of using adhesive material,which is often used when an industrial flaw is *** optimization based on response surface methodology(RSM)and design of experiment software(DOE)was used to verify the current work.A theoretical examination of the crashworthiness behavior(maximum bending load,maximum deflection)and vibration attributes(natural frequency,damping ratio,transient temporal response)of honeycomb sandwich panels with different design parameters was also carried *** addition,the finite element method-based ANSYS software was used to confirm the theoretical *** findings of the present work showed that the relationship between the natural frequency,core height,and cell size is *** contrast,the relationship between the natural frequency and the thickness of the cell wall is ***,the damping ratio is inversely proportional to the core height and cell size but directly proportional to the thickness of the cell *** study indicates that altering the core height within 10-25 mm leads to a significant increase of 82%in the natural frequency and a notable decrease of 49%in the damping *** findings are based on a specific cell size value of 0.01 m and a cell wall thickness of 0.001 ***,the results indicate

关键词： Honeycomb Load Transient response Free vibration Natural frequency

The Impact of Urban and Rural Education Gap on Student Achievement Differences

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Journal of Contemporary Educational Research 2024年第9期8卷 145-150页

作者： Weiping Fu Abdul talib bin Mohamed Hashim Faculty of Human Development Universiti Pendidikan Sultan Idris35900 Tanjong MalimPerakMalaysia

With our country’s social development,the gap between urban and rural education has become increasingly obvious,especially the difference in student *** study aims to explore the impact of the urban-rural education gap on student *** study adopts a quantitative analysis method to collect and analyze the academic performance,learning resources,and social resources of urban and rural *** results show that the unbalanced distribution of educational resources in urban and rural areas is the key factor leading to the gap in students’*** example,urban education resources are abundant while rural education resources are relatively *** the same time,the difference in social environment and family economic status also have a significant impact on student *** differences between urban and rural areas,particularly in terms of family economic conditions and their ability to invest in education,further widen the gap between urban and rural *** results of this study can provide a reference for reducing the gap between urban and rural education and improving the academic performance of rural students.A fair education policy is essential to narrow the gap between urban and rural education resources distribution,so as to improve the equality of education in society.

关键词： Urban and rural education gap Student achievement differences Allocation of educational resources Social and environmental differences Family economic situation

Evolution of the“ancient Kedah”:A study on urban forms at Sungai Batu Archaeological Complex(SBAC),Bujang Valley,Kedah,Malaysia

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Frontiers of Architectural Research 2024年第1期13卷 127-143页

作者： Mohd Hasfarisham Abd Halim Naizatul Akma Mohd Mokhtar Nor Khairunnisa talib Shyeh Sahibul Karamah Masnan Ahmad Fadly Jusoh Mokhtar Saidin Kedah Malaysia Universiti Utara Malaysia KedahMalaysia Universiti Sains Malaysia PenangMalaysia

Archaeological research at the Sungai Batu Archaeological Complex(SBAC),which has been carried out until 2023,aims to complete the chronological data and urbanization process of the ancient *** study will especially prove that the ongoing urbanization process is aimed at developing the iron smelting industry and trade in ancient Kedah,especially in *** is because archaeological research at SBAC has proven that with the existence of the ancient Kedah iron smelting workshop at SBAC,river jetties,port management,rituals,and Buddhist monuments began to be erected,all of which can be determined by chronometric *** results of the chronometric dating have proven that the ancient Kedah Kingdom existed since the 6th century BC and was oriented towards the trade of iron resources,which allowed the use of the area to grow *** process of urbanization and land use clearly conforms to Lynch’s principle,which emphasizes the principles of 1)paths,2)edges,3)districts,4)nodes,and 5)landmarks in the development process of land use and urbanization in the complex.

关键词： Chronometric dating Urbanization Land use Monument Iron smelting site

Effect of Dietary Components on the Shear Bond Strength of Orthodontics Brackets after Thermal Aging

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Open Journal of Stomatology 2024年第6期14卷 309-315页

作者： Philip Punzalan Tanya Al talib Anthony Fusco Neamat Hassan Abubakr School of Dental Medicine University of Nevada Las Vegas Nevada USA

Introduction: The stability of orthodontic brackets throughout orthodontic treatment plays a critical role in the treatment’s effectiveness. The present in vitro study was designed to assess the impact of various dietary components on the performance of orthodontic brackets. Methods: Metal orthodontic brackets were bonded to 66 extracted anterior teeth divided into groups based on the solution type: Milk, Gatorade, Cold Coffee, and a control group using water. Each group consisted of 20 teeth except for the control group, which included six teeth. The bracketed teeth were submerged in their respective solutions for 15 minutes three times daily at different intervals to mimic an in vivo environment and were stored in artificial saliva at room temperature (23?C). The specimens underwent artificial aging through 10,000 cycles of thermocycling (representing one clinical year) between 5?C and 55?C. Shade measurements were taken using a VITA Easy Shade device, capturing the classic shade and L*, a*, and b* values. Delta E values were calculated immediately post-bonding and after 7 days, 1 month, 1, and 2 clinical years. The shear bond strength of each bracket was measured using an ultra-tester machine. Results: After two clinical years, significant differences in ΔE color values were observed across all groups, with the most substantial change noted in teeth immersed in cold coffee. Brackets submerged in milk demonstrated lower shear bond strength than other solutions, whereas the control group exhibited the highest shear bond strength (P = 0.01). Conclusion: The study indicates that dietary components significantly influence tooth color stability and the shear bond strength of orthodontic brackets, underscoring the importance of considering these factors in orthodontic treatment planning.

关键词： Shear Bond Orthodontic Brackets Color Stability Thermal Aging

Excess Carrier Lifetime Improvement in c-Si Solar Cells by YAG:Ce^(3+)-Yb^(3+)

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Chinese Physics Letters 2016年第5期33卷 140-143页

作者： talib Hussain 叶慧琪肖东 National Astronomical Observatories Nanjing Institute of Astronomical Optics &TechnologyKey Laboratory of Astronomical Optics & TechnologyNanjing Institute of Astronomical Optics&TechnologyChinese Academy of Sciences University of Chinese Academy of Sciences

Ce3＋-Yb3＋ doped Y3Al5O12 （YAG） is a luminescent down-conversion material which could convert visible pho- tons to near infrared photons. In this work, YAG：Ce3＋-Yb3＋ is applied on the front surface of mass-produced mono crystalline Si solar cells. For the coated cells, the external quantum efficiencv from the visible to the near infrared is improved, and the energy conversion efficiency enhances from 11.70% to 12.2% under ***. Furthermore, the phosphor down-conversion effect on the solar cell is characterized by the microwave detected photoconductivity technique on the n-type silicon wafer under the 977nm excitation. The down-conversion materials improve the average excess carrier lifetime from 22.5μs to 24.2#s and the average surface recombi- nation velocity reduces from ***/s to 371.6cm/s, which reveal the significant reduction in excess carrier recombination by the phosphors.

关键词： by on Yb Excess Carrier Lifetime Improvement in c-Si Solar Cells by YAG:Ce Si YAG of in is down

SAPEM: Secure Attestation of Program Execution and Program Memory for IoT Applications

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Computers, Materials & Continua 2021年第4期67卷 23-49页

作者： Nasa Ahmed Manar Abu talib Qassim Nasir Research Institute of Science and Engineering University of SharjahSharjahUAE Department of Computer Science University of SharjahSharjahUAE Department of Electrical Engineering University of SharjahSharjahUAE

Security is one of the major challenges that devices connected to the Internet of Things(IoT)face *** attestation is used to measure these devices’trustworthiness on the network by measuring the device platform’s *** software-based attestation mechanisms have been proposed,but none of them can detect runtime *** some researchers have attempted to tackle these attacks,the proposed techniques require additional secured hardware parts to be integrated with the attested devices to achieve their *** solutions are expensive and not suitable in many *** paper proposes a dual attestation process,SAPEM,with two phases:static and *** static attestation phase examines the program memory of the attested *** dynamic program ow attestation examines the execution correctness of the application *** can detect code injection and runtime attacks that hijack the control-ow,including data attacks that affect the program *** main aim is to minimize attestation overhead while maintaining our ability to detect the specied *** validated SAPEM by implementing it on Raspberry Pi using its TrustZone *** attested it against the specied attacks and compared its performance with the related work in the *** results show that SAPEM signicantly minimizes performance overhead while reliably detecting runtime attacks at the binary level.

关键词： IoT remote attestation runtime attacks trust TrustZone security

Eco friendly adsorbents for removal of phenol from aqueous solution employing nanoparticle zero-valent iron synthesized from modified green tea bio-waste and supported on silty clay

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Chinese Journal of Chemical Engineering 2021年第8期34卷 19-28页

作者： Shaimaa T.Kadhum Ghayda Yassen Alkindi talib M.Albayati Department of Civil Engineering University of Technology52 Alsinaa St.BaghdadPO Box 35010Iraq Department of Chemical Engineering University of Technology52 Alsinaa St.Baghdad 35010Iraq

The present research investigated a novel route for the synthesis of nanoparticle zero-valent iron(NZVI)utilizing an aqueous extract of green tea waste as a reductant with ferric ***,the supported nanoparticle zerovalent iron was synthesized using natural silty clay as a support material(SC-NZVI).The NZVI and SC-NZVI were characterized by infrared spectroscopy(FTIR),scanning electron microscope(SEM),X-ray diffraction(XRD),Brunauer–Emmett–Teller(BET),and zeta potential(ζ).The interpretation of the results demonstrated that the polyphenol and other antioxidants in green tea waste can be used as reduction and capping agents in NZVI synthesis,with silty clay an adequate ***,the experiments were carried out to explore phenol adsorption by NZVI and *** determine the optimum conditions,the impact of diverse experimental factors(i.e.,initial pH,adsorbent dose,temperature,and concentration of phenol)was ***,Freundlich,and Tempkin isotherms were used as representatives of adsorption *** obtained results indicated that the adsorption processes for both NZVI and SC-NZVI well fitted by the Freundlich isotherm *** appropriateness of pseudofirstorder and pseudosecondorder kinetics was *** experimental kinetics data were good explained by the second-order *** thermodynamic parameters(ΔH0,ΔS0,andΔG0)for NZVI and SC-NZVI were *** maximum removal rates of phenol at optimum conditions,when adsorbed onto NZVI and SC-NZVI,were found to be 94.8%and 90.1%,respectively.

关键词： Wastewater treatment Environment Nano zero-valent iron Silty clay Phenol Adsorption

Aspect Extraction Approach for Sentiment Analysis Using Keywords

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Computers, Materials & Continua 2023年第3期74卷 6879-6892页

作者： Nafees Ayub Muhammad Ramzan talib Muhammad Kashif Hanif Muhammad Awais Department of Computer Science Government College UniversityFaisalabad38000Pakistan Department of Software Engineering Government College UniversityFaisalabad38000Pakistan

Sentiment Analysis deals with consumer reviews available on blogs,discussion forums,E-commerce websites,andApp *** online reviews about products are also becoming essential for consumers and companies as *** rely on these reviews to make their decisions about products and companies are also very interested in these reviews to judge their products and *** reviews are also a very precious source of information for requirement *** companies and consumers are not very satisfied with the overall sentiment;they like fine-grained knowledge about consumer *** to this,many researchers have developed approaches for aspect-based sentiment *** existing approaches concentrate on explicit aspects to analyze the sentiment,and only a few studies rely on capturing implicit *** paper proposes a Keywords-Based Aspect Extraction method,which captures both explicit and implicit *** also captures opinion words and classifies the sentiment about each *** applied semantic similarity-basedWordNet and SentiWordNet lexicon to improve aspect *** used different collections of customer reviews for experiment purposes,consisting of eight datasets over seven *** compared our approach with other state-of-the-art approaches,including Rule Selection using Greedy Algorithm(RSG),Conditional Random Fields(CRF),Rule-based Extraction(RubE),and Double Propagation(DP).Our results have shown better performance than all of these approaches.

关键词： Sentiment analysis aspect extraction keywords-based machine learning

Application of GIS to Estimate Soil Erosion Using RUSLE

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Geo-Spatial Information Science 2003年第1期6卷 34-37页

作者： Mushtak talib Jabbar Institue of Mathe matical Geology & RemoteSensing

This paper describes the use of the Arc/Info and ArcView GIS tools to estimate soil erosion with Universal Soil Loss Equation (USLE).Calculations are be done by using capabilities *** study start with a digital elevation model (DEM) of Shaanxi,which was created by digitizing contour and spot heights from the topographic map on 1∶250 000 scale and grid themes for the USLE K and C *** is note worthy that USLE K can be obtained by adding the K factor as an attribute to a soil theme’s *** C can be obtained from tables or using the information about land use and management given by USLE program.A land use theme can be used to add the C factors as an attribute *** purpose of this study is to establish spatial information of soil erosion using USLE and GIS and discuss the analysis of the soil erosion and slope failures in GIS and formulate the possible framework.

关键词： soil erosion USLE DEM GIS