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Uplift of Symmetrical Anchor Plates by Using Grid-Fixed Reinforced Reinforcement in Cohesionless Soil

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China Ocean Engineering 2014年第1期28卷 115-126页

作者： hamed Niroumand Khairul Anuar kassim Department of Geotechnical Engineering Faculty of Civil EngineeringUniversity of Technology Malaysia

Uplift response of symmetrical anchor plates with and without grid fixed reinforced （GFR） reinforcement was evaluated in model tests and numerical simulations by Plaxis. Many variations of reinforcement layers were used to reinforce the sandy soil over symmetrical anchor plates. In the current research, different factors such as relative density of sand, embedment ratios, and various GFR parameters including size, number of layers, and the proximity of the layer to the symmetrical anchor plate were investigated in a scale model. The failure mechanism and the associated rupture surface were observed and evaluated. GFR, a tied up system made of fiber reinforcement polymer （FRP） strips and end balls, was connected to the geosynthetic material and anchored into the soil. Test results showed that using GFR reinforcement significantly improved the uplift capacity of anchor plates. It was found that the inclusion of one layer of GFR, which rested directly on the top of the anchor plate, was more effective in enhancing the anchor capacity itself than other methods. It was found that by including GFR the uplift response was improved by 29%. Multi layers of GFR proved more effective in enhancing the uplift capacity than a single GFR reinforcement. This is due to the additional anchorage provided by the GFR at each level of reinforcement. In general, the results show that the uplift capacity of symmetrical anchor plates in loose and dense sand can be significantly increased by the inclusion of GFR. It was also observed that the inclusion of GFR reduced the requirement for a large L/D ratio to achieve the required uplift capacity. The laboratory and numerical analysis results are found to be in agreement in terms of breakout factor and failure mechanism pattern.

关键词： grid fixed reinforced (GFR) Plaxis fiber reinforcement polymer (FRP) uplift response anchor plate

Ultimate bearing capacity of strip footing resting on clay soil mixed with tire-derived aggregates

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Frontiers of Structural and Civil Engineering 2021年第4期15卷 1016-1024页

作者： Ali AREFNIA Ali DEhGhANBANADAKI Khairul Anuar kassim Department of Geotechnics&Transportation School of Civil EngineeringFaculty of EngineeringUniversiti Teknologi MalaysiaSkudai81310Malaysia Department of Civil Engineering Roudehen BranchIslamic Azad UniversityTehranIran Department of Civil Engineering Damavand BranchIslamic Azad UniversityDamavandTehranIran

This study investigated the use of recycled tire-derived aggregate(TDA)mixed with kaolin as a method of increasing the ultimate bearing capacity(UBC)of a strip *** 1g physical modeling tests were prepared in a rigid box of 0.6 m×0.9 m in plan and 0.6 m in *** sample preparation,0%,20%,40%,or 60%(by weight)of powdery,shredded,small-sized granular(G 1–4 mm)or large-sized granular(G 5–8 mm)TDA was mixed with the kaolin.A strip footing was then placed on the stabilized kaolin and was caused to fail under stress-controlled conditions to determine the UBC.A rigorous 3D finite element analysis was developed in Optum G-3 to determine the UBC values based on the experimental test *** experimental results showed that,except for the 20%powdery TDA,the TDA showed an increase in the UBC of the strip *** kaolin mixed with 20%G(5–8 mm),the UBC showed a threefold increase over that for the unreinforced *** test with 20%G(1–4 mm)recorded the highest subgrade *** was observed that the UBC calculated using finite element modeling overestimated the experimental UBC by an average of 9%.

关键词： kaolin physical modeling tests stabilization numerical modeling

Electrochemical Formation of Polypyrrole-carboxymethylcellulose Conducting Polymer Composite Films

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Journal of Materials Science & Technology 2005年第5期21卷 661-665页

作者： h.N.M.Ekramul Mahmud Anuar kassim Zulkarnain Zainal Wan Mahmood Mat Yunus Faculty of Science Universiti Putra Malaysia43400 Serdang SelangorMalaysiaFaculty of Science Universiti Putra Malaysia43400 Serdang SelangorMalaysiaFaculty of Science Universiti Putra Malaysia43400 Serdang SelangorMalaysiaFaculty of Science Universiti Putra Malaysia43400 Serdang SelangorMalaysia

The electrochemical preparation of polypyrrole-carboxymethylcellulose （PPY-CMC） conducting polymer composite films on indium tin oxide （ITO） glass electrode from an aqueous solution containing pyrrole monomer, ptoluenesulfonate electrolyte and carboxymethylcellulose insulating polymer is reported. The characterization by Fourier transform infrared spectroscopy （FT-IR） shows that carboxymethylcellulose （CMC） has been successfully incorporated into polypyrrole structure forming PPY-CMC polymer composite films. The conductivity of the prepared composite films was found to increase with increaseing CMC concentration in pyrrole solution, The optical microscopic results show the influence of CMC concentration in the pyrrole solution over the morphological changes of the prepared films. The dynamic mechanical analysis （DMA） on the prepared PPY-CMC film reveals the higher plastic property of the PPY-CMC composite film.

关键词： Conducting polymer Polypyrrole Carboxymethylcellulose

A Novel 1×2 Thermo-Optic Multimode Interference Switch Structure Based on Photodefinable Benzocyclobutene （BCB 4024-40） Polymer on Silica

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Chinese Physics Letters 2006年第10期23卷 2796-2798页

作者： M.h.Ibrahim Mee-Koy Chin N.M.kassim A.B.Mohammad Photonics Research Croup Universiti Teknologi Malaysia Johor Malaysia Photonics Research Center Nanyang Technological University Singapore

A novel 1× 2 multimode interference photonics switch structure based on thermal controlling effect is proposed. A ridge waveguide of photosensitive polymer, benzocyclobutene （BCB 4024-40） on silica clad is used as a design structure. A temperature changes as a result of electrode heating are analysed by employing a two-dimensional finite difference thermal model considering both conduction and convection mechanisms. The switching characteristics due to changes in effective index are analysed by the two-dimensional finite difference beam propagation method with transparent boundary condition. The proposed structure works well with low crosstalk level of -28 dB and low switching power relatively to the structural upper cladding thickness.

关键词： Thermo-Optic Multimode Interference Switch Structure BCB 4024-40 Silica

Critical review of cyclist speed measuring techniques

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Journal of Traffic and Transportation Engineering(English Edition) 2020年第1期7卷 98-110页

作者： Ali kassim hasan Tayyeb Mubark Al-Falahi Department of Civil and Environmental Engineering Carleton UniuersityOttawaON K1S 5B6Canada Department of Civil Engineering Umm Al-Qura UniversityMakkahSaudi Arabia Department of Urban Planning&Municipalities Municipal Operations SectorMadinat Zayed Center-Technical Services DepartmentAbu-DhabiUnited Arab Emirates

There is a growing global interest in developing and accommodating sustainable modes of *** is an important mode of travel which offers powerful solutions to chronic traffic problems of congestion and *** accuracy of cyclist position is considered as an important parameter for the calculation of cyclist *** speed data is required for precise design of traffic control measures,for safety studies,and for sight distance *** speed measurement techniques and results are found in the *** study critically examines peer-reviewed studies which discuss different techniques for measuring cyclist *** review covers the accuracy of the measurement techniques and highlights limitations of the reviewed *** identified limitations are classified as:limited range of movement directions,selection of observed cyclists,seasonal variation in measurements,completeness of results reporting,reporting of equipment limitations,and measurement *** study summarizes previous findings of cyclist speed *** study also reviews the level of automation in speed *** technique involving a human input during the field data collection or analysis to estimate cyclist speed is classified as a *** categories for semiautomated and automated measurement techniques are ***-analysis was conducted to test whether reported cyclist speed depends on where they were recorded;intersections or road *** result of the unpaired t-test showed that there is no significant difference between the means of the cyclists speed at road sections and signalized intersections at the 95%of confidence *** study emphasizes the growing importance of the use of automated computer vision techniques for speed *** paper contrasts the advantages of computer vision techniques with other measurement techniques.

关键词： Transportation engineering Cyclist speed Video analysis Signalized intersection

Dynamic stress concentration in an infinitely long cylindrical cavity due to a point spherical source embedded within a fluid-saturated poroelastic formation of infinite extent

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Applied Mathematics and Mechanics(English Edition) 2025年第1期46卷 139-156页

作者： h.hOSSEINI O.BALILAShAKI Department of Mechanical Engineering Faculty of EngineeringGolestan University

The effects of a harmonically exciting monopole source on an infinitely long cylindrical cavity embedded entirely within a fluid-saturated poroelastic formation of infinite extent are examined theoretically. It is assumed that the source is located outside the cavity at a specified distance from the borehole axis. The magnitudes of the hoop and radial stresses beside the pore pressures exerted on the interface and inside the porous medium surrounding the borehole are calculated and discussed. Biot's poroelastic modeling along with three types of boundary conditions for the cylindrical interface including the ideal fluid, empty borehole, and rigid inclusion with a hard boundary is employed for the analysis. Utilizing a proper translational addition theorem for expressing the incident spherical wave in terms of cylindrical wave expansions, the proposed boundary conditions at the interface are satisfied. Stresses are formulated by means of wave potential functions in a three-dimensional(3D) manner. The effects of the frequency and the radial distance between the source and borehole on the induced stresses are examined for the first cylindrical modes over frequency spectra. Two permeability conditions for the interface and three types of soils for the porous formation are considered throughout the analysis. To give an overall outline of the study, a numerical example is presented. The results clearly indicate that the distance is a key parameter and has considerable effects on the induced stress values. In addition, the interface permeability condition and soil characteristics play an important role in determining the dynamic response of the borehole. Finally,the obtained results are compared with the relevant analyses existing in the literature for some limit cases, and good agreement is achieved.

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Neuroinflammation as a therapeutic target in huntington's disease

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Neural Regeneration Research 2025年第3期20卷 817-818页

作者： Andrea Kwakowsky Thulani h.Palpagama Center for Brain Research and Department of Anatomy and Medical Imaging Faculty of Medical and Health SciencesUniversity of AucklandAucklandNew Zealand Pharmacology and Therapeutics School of MedicineGalway Neuroscience CentreUniversity of GalwayGalwayIreland

In 1872, George huntington presented his essay “On Chorea” to the Meigs and Mason Academy of Medicine and, in doing so, detailed a disease that would later bear his name. huntington's disease(hD) is a genetic, neurodegenerative disease that manifests as the loss of motor control,cognitive impairment,and mood and psychiatric changes in paents.

关键词： huntington inflammation Medicine

Glial response in the midcingulate cortex in huntington’s disease

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Neural Regeneration Research 2025年第1期20卷 207-208页

作者： Thulani h.Palpagama Andrea Kwakowsky Center for Brain Research and Department of Anatomy and Medical Imaging Faculty of Medical and Health SciencesUniversity of AucklandAucklandNew Zealand Pharmacology and Therapeutics School of MedicineGalway Neuroscience CenterUniversity of GalwayGalwayIreland

huntington’s disease(hD)is a genetic disease characterized by the progressive degeneration of the striatum and *** can present with a variety of symptoms that can broadly be classified into motor symptoms,inclusive of choreatic movements and rigidity,mood and psychiatric symptoms,such as depression and apathy,and cognitive symptoms,such as cognitive *** causal mutation underlying hD results from an expansion of a CAG repeat sequence on the IT15 gene,resulting in the formation and accumulation of a mutant huntingtin protein.

关键词： huntington degeneration cortex

Prediction of moment of inertia of rotating nuclei

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Chinese Physics C 2020年第11期44卷 179-188页

作者： Mohd Kh.M.Abu El Sheikh A.A.Okhunov h.Abu kassim M.U.Khandaker Department of Physics University of Malaya50603 Kuala LumpurMalaysia Department of Science in Engineering International Islamic University Malaya50728 Kuala LumpurMalaysia Namangan Institute of Engineering and Technology 160000 NamanganUzbekistan Centre for Biomedical Physics School of Healthcare and Medical SciencesSunway University47500 Bandar SunwayMalaysia

In this study,the mathematical expression formulated by Bohr for the moment of inertia of even-even nuclei based on the hydrodynamical model is *** modification pertains to the kinetic energy of the surface oscillations,including the second and third terms of the R-expansion as well as the first term,which had already been modified by ***,this work can be considered a continuation and support of Bohr's hydrodynamic *** procedure yields a Bohr formula to be multiplied by a factor that depends on the deformation ***'s(modified)formula is examined by applying it on axially symmetric even-even nuclei with atomic masses ranging between 150 and 190 as well as on some triaxial symmetry *** this paper,the modification of Bohr's formula is discussed,including information about the stability of this modification and the second and third terms of the R-expansion in Bohr's *** results of the calculation are compared with the experimental data and Bohr's results recorded *** results obtained are in good agreement with experimental data,with a ratio of approximately 0.7,and are better than those of the unmodified ones.

关键词： moment of inertia hydrodynamical model irrotational motion