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Sedimentology of the Redang Island Coral Reefs Environment

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Journal of Chemistry and Chemical Engineering 2010年第2期4卷 41-47页

作者： Nor Antonina Binti Abdullah noor azhar mohd shazili Norhayati binti mohd . Tahir Siti Zauyah binti Darus Marine Science Department Faculty of Maritime Studies and Marine Science University Malaysia Terengganu MengabangTelipot Kuala Terengganu 21030 Malaysia Institute of Oceanography Universiti Malaysia Terengganu Mengabang Telipot Kuala Terengganu 21030 Malaysia Research and Management Centre Universiti l~l＇alaysia Terengganu Mengabang Telipot Kuala Terengganu 21030 Malaysia Land Management Department Faculty of Agriculture Universi~ Putra Malaysia Serdang Selangor 41300 Malaysia

A study on the sedimentology of the Redang Island coral reefs environment was conducted. Sediments were collected on board UNIPERTAMA VII during the pre and post monsoon seasons. Twenty and seven sediments samples were collected using a Smith McIntyre grab on board UNI PERTAMA VII and put in labelled plastic bags then brought back to the laboratory for analysis. The sediments were analyzed for their sedimentological characteristics （mean size, skewness, standard deviation and kurtosis） using dry sieving method. Results showed that the highest mean size value of the sediments during the pre and post monsoons seasons are 2.14 ~ and 2.37 O. respectively and the lowest are -0.40 q~ and -0.10 ~, respectively. Based on the results, sediments can be classified as medium sand （34%）, poorly sorted （67%）, strongly negative skewed （36%） and extremely leptokurtic （56%） during the pre monsoon season, while during the post monsoon season sediments can be classified as medium sand （38%）, poorly sorted （73%）, strongly negative skewed （41%） and very leptokurtic （62%）. Results revealed that the sediments in the whole study area are relatively coarse. No relationship was observed between mean size and other sedimentological characteristics （R2= 0.05 pre-monsoon. R2 =0.0017 post monsoon） with seasons.

关键词： Sedimentology redang island coral reefs sediment.

Radiative Blood-Based Hybrid Copper-Graphene Nanoliquid Flows along a Source-Heated Leaning Cylinder

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Computer Modeling in Engineering & Sciences 2024年第4期139卷 1017-1037页

作者： Siti Nur Ainsyah Ghani noor Fadiya mohd noor Institute of Mathematical Sciences Faculty of ScienceUniversiti MalayaKuala Lumpur50603Malaysia Center for Data Analytics Consultancy&Services(UM-CDACS) Faculty of ScienceUniversiti MalayaKuala Lumpur50603Malaysia

Variant graphene,graphene oxides(GO),and graphene nanoplatelets(GNP)dispersed in blood-based copper(Cu)nanoliquids over a leaning permeable cylinder are the focus of this *** forms of graphene are highly beneficial in the biological and medical fields for cancer therapy,anti-infection measures,and drug *** non-Newtonian Sutterby(blood-based)hybrid nanoliquid flows are generalized within the context of the Tiwari-Das model to simulate the effects of radiation and heating *** governing partial differential equations are reformulated into a nonlinear set of ordinary differential equations using similar transformational *** equations are then transformed into boundary value problems through a shooting technique,followed by the implementation of the bvp4c tool in *** influences of various parameters on the model’s nondimensional velocity and temperature profiles,reduced skin friction,and reduced Nusselt number are presented for detailed *** results indicated that Cu-GNP/blood and Cu-GO/blood hybrid nanofluids exhibit the lowest and highest velocity distributions,respectively,for increased nanoparticles volume fraction,curvature parameter,Sutterby fluid parameter,Hartmann number,and wall permeability ***,opposite trends are observed for the temperature distribution for all considered parameters,except the mixed convection *** in the reduced skin friction magnitude and the reduced Nusselt number with higher values of graphene/GO/GNP nanoparticle volume fraction are also ***,GNP is identified as the superior heat conductor,with an average increase of approximately 5%and a peak of 7.8%in the reduced Nusselt number compared to graphene and GO nanoparticles in the Cu/blood nanofluids.

关键词： Hybrid nanofluid sutterby fluid tiwari-das model thermal radiation graphene graphene oxides graphene nanoplatelets

Modeling sprawl of unauthorized development using geospatial technology: case study in Kuantan district, Malaysia

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International Journal of Digital Earth 2011年第3期4卷 223-238页

作者： Mazlan Hashim Norzailawati mohd noor Maged Marghany Institute of Geospatial Science&Technology(INSTEG) Faculty of Geoinformation Sciences and EngineeringUniversiti Teknologi Malaysia81300 UTM SkudaiJohor BahruMalaysia

The paper explores a framework combining remote sensing and GIS-cellular automata(CA)concepts aimed at improving the modeling of unauthorized land use *** sensing data have been used in urban modeling and analysis,the use of high-resolution remote sensing data in assessing unauthorized development is quite *** work has demonstrated systematic combination utilization of geospatial analyses tools to acquire a new level of information to enable urban modeling and sprawl analysis in assisting urban sustainable *** this study,Kuantan city,Malaysia was selected in simulation of the unauthorized land use with CA concept for a period of 15 years(20002015),with main input time-series land use observation from 1995 to *** 2000 and 2005 land use input was also used as calibrated and test assessment of the *** results show excellent agreement between in-situ changes of the unauthorized land use classes and the corresponding simulated classes within the same *** conclusion,CA model can lead to new levels of understanding of how urban areas grow and change as in view of digital earth aspiration.

关键词： cellular automata sprawl remote sensing GIS urban simulation

Development of niobium-promoted cobalt catalysts on carbon nanotubes for Fischer-Tropsch synthesis

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Journal of Natural Gas Chemistry 2011年第6期20卷 659-663页

作者： Sardar Ali noor Asmawati mohd Zabidi Duvvuri Subbarao Department of Chemical Engineering Universiti Teknologi PETRONASBandar Seri Iskandar31750 TronohPerakMalaysia Department of Fundamental and Applied Sciences Universiti Teknologi PETRONASBandar Seri Iskandar31750 TronohPerakMalaysia

Cobalt-based catalysts were prepared by a wet impregnation method on carbon nanotubes （CNTs） support and promoted with *** were characterized by nitrogen adsorption,TEM,XRD,TPR,TPO and *** of niobium increased the dispersion of cobalt but decreased the catalysts ***-Tropsch synthesis （FTS） was carried out in a fixed-bed microreactor at 543 K,1 atm and H2/CO=2 for 5 *** of niobium enhanced the C5＋ hydrocarbons selectivity by 39% and reduced methane selectivity by 59%.These effects were more pronounced for 0.04%Nb/Co/CNTs catalyst,compared with those observed for other niobium compositions.

关键词： CNTs cobalt niobium Fischer-Tropsch synthesis

Novel Nano Structure for Green Energy Harvesting at 10μm Thermal Radiation

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Journal of Electronic Science and Technology 2016年第3期14卷 242-248页

作者： mohd Khairul Hisham Ismail Mazlina Esa mohd Fairus mohd Yusoff noor Asniza Murad National Space Agency Banting 42700Malaysia the Faculty of Electrical engeering Universiti Teknologi MalaysiaJohor Bahru 81310Malaysia

In recent years, the potential of renewable green energy sources has been extensively studied. The proven technology which is photovoltaic solar cells strictly depends on daylight and produces low-efficiently. To overcome the restrictions, one technology studied is through harvesting the thermal radiation energy which can provide a 24-hour energy source. The continuity of energy sources promises very good energy conversion especially for military applications. This article presents a new structure that can harvest the abundant thermal radiation energy into usable energy at the wavelength of l0 lum. A rectangular structure with a perturbation slit was designed to integrate with a rectifier circuit for green energy conversion. The slit tunnel junction guided the electromagnetic field into a junction where the energy could be collected and converted. An enhancement factor of approximately 110.6 can be achieved by a perturbation slit length of 1.0 μm. The results extracted from the proposed design promise a better candidate to overcome the disadvantages of photovoltaic solar cells for energy harvesting devices.

关键词： Enhancement factor green energy harvesting renewable thermal radiation.

Synthesis and characterization of niobium-promoted cobalt/iron catalysts supported on carbon nanotubes for the hydrogenation of carbon monoxide

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燃料化学学报 2016年第7期44卷 815-821页

作者： Zahra Gholami noor Asmawati mohd Zabidi Fatemeh Gholami Mohammadtaghi Vakili Centralized Analytical Laboratory Universiti Teknologi PETRONAS Department of Fundamental and Applied Sciences Universiti Teknologi PETRONAS Department of Mechanical Engineering Faculty of EngineeringUniversity of Malaya School of Industrial Technology Universiti Sains Malaysia

Bimetallic Co /Fe catalysts supported on carbon nanotubes( CNTs) were prepared,and niobium( Nb) was added as promoter to the 70 Co ∶30Fe /CNT catalyst. The physicochemical properties of the catalysts were characterized,and the catalytic performances were analyzed at the same operation conditions( H_2 ∶CO( volume ratio) = 2 ∶1,p = 1 MPa,and t = 260 ℃) in a tubular fixed-bed microreactor system. The addition of Nb to the bimetallic catalyst decreases the average size of the oxide nanoparticles and improves the reducibility of the bimetallic catalyst. Evaluation of the catalyst performance in a Fischer-Tropsch reaction shows that the catalyst results in high selectivity to methane,and the selectivity to C_(5+) increased slightly in the bimetallic catalyst unlike that in the monometallic catalysts. The addition of 1% Nb to the bimetallic catalyst increases CO conversion and selectivity to C_(5+). Meanwhile,a decrease in methane selectivity is observed.

关键词： Fischer-Tropsch synthesis bimetallic catalyst niobium promoter carbon nanotubes

Effect of Synthesis Technique and Carbonate Content on the Crystallinity and Morphology of Carbonated Hydroxyapatite

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Journal of Materials Science & Technology 2013年第8期29卷 761-764页

作者： Chia Ching Kee Hanafi Ismail Ahmad Fauzi mohd noor School of Materials and Mineral Resources Engineering Engineering CampusUniversiti Sains Malaysia14300 Nibong TebalPenangMalaysia

The syntheses of nanosized carbonated hydroxyapatite （CHA） were performed by comparing dropwise and direct pouring of acetone solution of Ca（NO3）2·4H2O into mixture of （NH4）2HPO4 and NH4HCO3 at room temperature controlled at pH 11. Direct pouring method was later applied to study the increment of carbonate content in syntheses. The as-synthesized powders were characterized by various characterization techniques. The crystallographic results of the produced powders were obtained from X-ray diffraction analysis, whilst the carbonate content in the produced powders was determined by the CHNS/O elemental analyzer. Fourier transform infrared analysis confirmed that the CHA powders formed were B-type. Field emission scanning electron microscopy revealed that the powders were highly agglomerated in nanosized range and hence energy filtered transmission electron microscopy was employed to show elongated particles which decreased with increasing carbonate content.

关键词： Bioceramic Carbonated hydroxyapatite Dropwise Direct pouring

Intuitionistic fuzzy DEMATEL for developing causal relationship of water security

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International Journal of Intelligent Computing and Cybernetics 2023年第3期16卷 520-544页

作者： Lazim Abdullah Herrini mohd Pouzi noor Azzah Awang Universiti Malaysia Terengganu TerengganuMalaysia Universiti Teknologi MARA Shah AlamMalaysia

Purpose–This study aims to develop a cause-effect relationship between criteria that contribute to water security using the Intuitionistic Fuzzy-Decision-Making Trial and Evaluation Laboratory(IF-DEMATEL)*** from the typical DEMATEL which utilizes crisp numbers,this modification introduces intuitionistic fuzzy numbers(IFNs)to enhance judgments in a group decision-making *** particular,the linguistic variables used in IF-DEMATEL are defined using the concept of three-tuple of ***/methodology/approach–Data with the linguistic variable“influence”were collected from a group of experts in water security via personalunstructured *** water security criteria are considered in this *** software was employed to execute the computational procedures of the IF-DEMATEL *** is anticipated that by taking into account the hesitation degree of IFNs will reflect the scenario in real life,which could lead to precise ***–Theresultsshowthat“Over-Abstraction”,“SaltwaterIntrusion”and“LimitedInfrastructures”are the cause criteria that contribute to water *** addition,the relationship map of influence shows that“Water Pollution”and“Rapid Urbanization”are the most vulnerable criteria as these two criteria are most easily affected by other criteria in a unidirectional ***–It is anticipated that these findings will serve as useful references for water security management and ***/value–The present study makes a noteworthy contribution to the modification of DEMATEL where three-tuple of intuitionistic fuzzy numbers are considered in the *** present study also provides additional evidence with respect to factors that contribute to water security.

关键词： Decision making Intuitionistic fuzzy set DEMATEL Water security Relationship of influence

Immune Dysfunction in Cirrhosis

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Journal of Clinical and Translational Hepatology 2017年第1期5卷 50-58页

作者： mohd Talha noor Piyush Manoria Department of Gastroenterology Sri Aurobindo Medical College and Post Graduate InstituteIndoreIndia

Cirrhosis due to any etiology disrupts the homeostatic role of liver in the ***-associated immune dysfunction leads to alterations in both innate and acquired immunity,due to defects in the local immunity of liver as well as in systemic ***-associated immune dysfunction is a dynamic phenomenon,comprised of both increased systemic inflammation and immunodeficiency,and is responsible for 30%*** also plays an important role in acute as well as chronic *** paralysis can accompany it,which is characterized by increase in antiinflammatory cytokines and suppression of proinflammatory *** is also presence of increased gut permeability,reduced gut motility and altered gut flora,all of which leads to increased bacterial *** increased bacterial translocation and consequent endotoxemia leads to increased blood stream bacterial infections that cause systemic inflammatory response syndrome,sepsis,multiorgan failure and *** gut microbiota of cirrhotic patients has more pathogenic microbes than that of noncirrhotic individuals,and this disturbs the homeostasis and favors gut *** diagnosis and treatment of such infections are necessary for better *** have reviewed the various mechanisms of immune dysfunction and its consequences in *** the exact pathophysiology of immune dysfunction will help treating clinicians in avoiding its complications in their patients and can lead to newer therapeutic interventions and reducing the morbidity and mortality rates.

关键词： Cirrhosis Immune dysfunction Inflammation Liver disease