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An Expert System to Detect Political Arabic Articles Orientation Using CatBoost Classifier Boosted by multi-Level Features

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Computer Systems Science & Engineering 2024年第6期48卷 1595-1624页

作者： Saad m.Darwish abdul rahman m.sabri Dhafar Hamed Abd Adel A.Elzoghabi Department of Information Technology Institute of Graduate Studies and ResearchAlexandria UniversityEl ShatbyP.O.Box 832Alexandria21526Egypt Department of Computer Science College of Computer Science and Information TechnologyUniversity of AnbarBaghdad55431Iraq

The number of blogs and other forms of opinionated online content has increased dramatically in recent *** fields,including academia and national security,place an emphasis on automated political article orientation *** articles(especially in the Arab world)are different from other articles due to their subjectivity,in which the author’s beliefs and political affiliation might have a significant influence on a political *** categories representing the main political ideologies,this problem may be thought of as a subset of the text categorization(classification).In general,the performance of machine learning models for text classification is sensitive to hyperparameter ***,the feature vector used to represent a document must capture,to some extent,the complex semantics of natural *** this end,this paper presents an intelligent system to detect political Arabic article orientation that adapts the categorical boosting(CatBoost)method combined with a multi-level feature *** features at multiple levels can enhance the model’s ability to discriminate between different classes or *** level may capture different aspects of the input data,contributing to a more comprehensive ***,a robust and efficient gradient-boosting algorithm,is utilized to effectively learn and predict the complex relationships between these features and the political orientation labels associated with the articles.A dataset of political Arabic texts collected from diverse sources,including postings and articles,is used to assess the suggested ***,reform,and revolutionary are the three subcategories of these *** results of this study demonstrate that compared to other frequently used machine learning models for text classification,the CatBoost method using multi-level features performs better with an accuracy of 98.14%.

关键词： Political articles orientation detection CatBoost classifier multi-level features context-based classification social networks machine learning stylometric features

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The effect of replacing pnictogen elements on the physical properties of Srmg_2X_2(X=N,P,As,Sb,Bi) Zintl compounds

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Chinese Physics B 2018年第4期27卷 369-375页

作者： G murtaza abdul Ahad Khan m Yaseen A Laref Naeem Ullah Inayat ur rahman materials modelling Labortary Department of PhysicsIslamia College University Department of Physics University of the Peshawar Department of Physics University of AgricultureFaisalabad Department of Physics and Astronomy College of ScienceKing Saud University Department of Physics City University of Hong Kong

The effect of replacing the anion from N to Bi down the group in the periodic table is investigated on Srmg2X2（X = N,P,As,Sb,Bi）.A full potential linearized augmented plane wave plus local orbitals method is used along with different exchange–correlation potentials to obtain the lattice constants,phonons,electronic,and optical properties of the Sr mg2X2（X = N,P,As,Sb,Bi） Zintl compounds.A good agreement is achieved and our calculations are validated by previous experimental and theoretical *** compounds have shown stable dynamical behavior with gamma centered longitudinal response having no imaginary *** band structures reveal the semiconducting nature of the *** Pnictogen（X）-p state contributed mainly in the valence band and the Sr-d state forms the conduction of the *** charge transfer and low overlapping of the atomic densities indicates the preferable ionic bonding character of these *** the optical properties,real and imaginary parts of dielectric function,complex refractive index,birefringence,reflectivity,and optical conductivity are *** compounds can be utilized in the optical and optoelectronic devices.

关键词： Zintl compounds band structure optical response

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A study of the impact of environmental loads that penetrate a passive skylight roofing system in malaysian buildings

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Frontiers of Architectural Research 2014年第2期3卷 178-191页

作者： Karam m. Al-Obaidi mazran Ismail abdul malek abdul rahman School of Housing Building & Planning Universiti Sains Malaysia Penang 11800 Malaysia

A passive skylight system is a significant building design element that provides an ideal condition for interior spaces. However, the use of this system is limited to specific climatic regions because of its considerable effect on the indoor environment. malaysia is a tropical country that has favorable natural benefits, such as solar geometry and natural light, which can brighten building interiors throughout the year. However, harnessing this benefit affects spaces, especially those in single-story buildings, because of excessive natural loads. This study reviews a concept to understand the passive behavior of solar radiation in the form of light and heat that falls on, interacts with, and is emitted from a skylight system in a single-story building. The study method is theoretically based on descriptive analysis to assess design requirements. The review shows that designs grounded on the physical aspects of climate （influenced variables）, materials （design variables）, and human comfort （affected variables） in one process （ESI） can develop the architectural way of thinking rather than estimate the condition based on a limited perspective. This assumption indicates that the adoption of this concept in the preliminary design stage will enable designers to balance the building environment effectively.

关键词： Skylight system Tropics Solar radiation Light Heat malaysian builtenvironment

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Passive cooling techniques through reflective and radiative roofs in tropical houses in Southeast Asia:A literature review

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Frontiers of Architectural Research 2014年第3期3卷 283-297页

作者： Karam m.Al-Obaidi mazran Ismail abdul malek abdul rahman School of Housing Building and PlanningUniversiti Sains Malaysia

Cooling is one of the major concerns in building tropical *** problem is exacerbated by the heat gain of the roof,which constitutes 70%of the total heat *** passive cooling technique is one of the innovative practices and technologies that provide buildings with comfortable conditions through natural *** and radiative processes are the methods used to decrease heat gain by facilitating the elimination of excess heat in a building's interior to maintain a comfortable *** that the potential of these techniques vary from region to region,their application in the tropics should be *** these approaches in detail allows us to rethink how to effectively adapt these techniques to overcome the build-up of heat in modern tropical houses in Southeast *** study reviews the physical characteristics of these approaches to guide architects and building *** indicate a great reduction in operational ***,the significant differences in the performance of colour and material properties should be considered,given that the selected approach strongly affects the required thermal conditions of a building.

关键词： Passive cooling Reflective roof Radiative roof Southeast Asia Tropical houses

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Effect of different additives on the phase separation behavior and thermodynamics of p-tert-alkylphenoxy poly (oxyethylene) ether in absence and presence of drug

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Chinese Journal of Chemical Engineering 2018年第5期26卷 1110-1118页

作者： marzia rahman md. Anamul Hoque mohammed abdullah Khan malik abdul Rub abdullah m. Asiri Department of Chemistry Jahangirnagar University Savar Dhaka 1342 Bangladesh Chemistry Department Faculty of Science King Abdulaziz University Jeddah 21589 Saudi Arabia Center of Excellence for Advanced materials Research King Abdulaziz UniversityJeddah 21589 Saudi Arabia

Cloud point （CP） determinations of 4-（1,1,3,3-tetramethylbutyl）phenyl-polyethylene glycol （TX-100 （nonionic surfactant）） was carried out in aqueous as well as in the attendance of drug （ceftriaxone sodium trihydrate （CFT））/（CFT ＋ different inorganic salts） and discussed thoroughly. Nonionic surfactants are employed exten- sively in different formulations. In aqueous solution, the values of CP of TX-100 are obtained to increase by means of enhancing of their concentration in the solution. The CP values of TX-100 solutions were found to de- crease in the presence of drug and their values decrease more with rising concentrations of the drug. The values of CP of CFT and TX-100 mixtures were found to further decrease in the attendance of inorganic salts in compar- ison to their absence. The effect of different sodium salts in decreasing CP values of TX-100 was achieved in the following order： NaCO3 〉 Na2SO4 〉 NaCl. However, in the case of potassium and ammonium salts, the decreasing order obtained is K2SO4 〉 KCO3 〉 KCI and （NH4）2SO4 〉 Na2CO3 〉 NH4Cl respectively. Various thermodynamic pa- rameters for example standard free energy （△G c）, standard enthalpy （△H c） as well as standard entropy （△S c） changes of phase separation were also evaluated and discussed in detail on the basis of their behavior.

关键词： Cloud point TX-100 Ceftriaxone sodium trihydrate Inorganic salts Thermodynamic parameters

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Absorbed dose estimations of ^(131)I for critical organs using the GEANT4 monte Carlo simulation code

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Chinese Physics C 2012年第11期36卷 1150-1156页

作者： Ziaur rahman Shakeel ur Rehman Waheed Arshed Nasir m mirza abdul Rashid Jahan Zeb Health Physics Division Pakistan Institute of Nuclear Science & TechnologyNiloreIslamabad 45650Pakistan Department of Physics & Applied mathematics Pakistan Institute of Engineering & Applied SciencesNiloreIslamabad 45650Pakistan

The aim of this study is to compare the absorbed doses of critical organs of 131I using the mIRD （medical Internal Radiation Dose） with the corresponding predictions made by GEANT4 simulations. S- values （mean absorbed dose rate per unit activity） and energy deposition per decay for critical organs of 131I for various ages, using standard cylindrical phantom comprising water and ICRP soft-tissue material, have also been estimated. In this study the effect of volume reduction of thyroid, during radiation therapy, on the calculation of absorbed dose is also being estimated using GEANT4. Photon specific energy deposition in the other organs of the neck, due to 131I decay in the thyroid organ, has also been estimated. The maximum relative difference of mIRD with the GEANT4 simulated results is 5.64% for an adult＇s critical organs of 131I. Excellent agreement was found between the results of water and ICRP soft tissue using the cylindrical model. S-values are tabulated for critical organs of 131I, using 1, 5, 10, 15 and 18 years （adults） individuals. S-values for a cylindrical thyroid of different sizes, having 3.07% relative differences of GEANT4 with Siegel ＆ Stabin results. Comparison of the experimentally measured values at 0.5 and 1 m away from neck of the ionization chamber with GEANT4 based monte Carlo simulations results show good agreement. This study shows that GEANT4 code is an important tool for the internal dosimetry calculations.

关键词： mean absorbed dose rate GEANT4 monte Carlo simulation and 131I critical organs

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CO_x-Free Hydrogen and Carbon Nanofibers Produced from Direct Decomposition of methane on Nickel-Based Catalysts

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Journal of Natural Gas Chemistry 2006年第4期15卷 253-258页

作者： Siang-Piao Chai Sharif Hussein Sharif Zein abdul rahman mohamed School of Chemical Engineering Universiti Sains MalaysiaEngineering Campus Seri Ampangan14300 Nibong TebalSPS Penang Malaysia

Direct decomposition of methane was carried out using a fixed-bed reactor at 700 ℃ for the production of COx-free hydrogen and carbon nanofibers. The catalytic performance of NiO-m/SiO2 catalysts （where m=AgO, CoO, CuO, FeO, mnOx and moO） in methane decomposition was investigated. The experimental results indicate that among the tested catalysts, NiO/SiO2 promoted with CuO give the highest hydrogen yield. In addition, the examination of the most suitable catalyst support, including Al2O3, CeO2, La2O3, SiO2, and TiO2, shows that the decomposition of methane over NiO-CuO favors SiOx support. Furthermore, the optimum ratio of NiO to CuO on SiO2 support for methane decomposition was determined. The experimental results show that the optimum weight ratio of NiO to CuO fell at 8：2 （w/w） since the highest yield of hydrogen was obtained over this catalyst.

关键词： methane decomposition hydrogen carbon nanofibers supported catalyst

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Passive coolin8 techniques throush reflective and radiative roofs in tropical houses in Southeast Asia： A literature review

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Frontiers of Architectural Research 2014年第3期3卷 283-297页

作者： Karam m. AI-Obaidi mazran Ismail abdul malek abdul rahman School of Housing Building and Planning Universiti Sains Malaysia Penang 11800 Malaysia

Cooling is one of the major concerns in building tropical houses. This problem is exacerbated by the heat gain of the roof, which constitutes 70% of the total heat gain. The passive cooling technique is one of the innovative practices and technologies that provide buildings with comfortable conditions through natural means. Reflective and radiative processes are the methods used to decrease heat gain by facilitating the elimination of excess heat in a bui[ding＇s interior to maintain a comfortable environment. Given that the potential of these techniques vary from region to region, their application in the tropics should be examined. Exploring these approaches in detail allows us to rethink how to effectively adapt these techniques to overcome the build-up of heat in modern tropical houses in Southeast Asia. This study reviews the physical characteristics of these approaches to guide architects and building designers. Results indicate a great reduction in operational cost. However, the significant differences in the performance of colour and material properties shoutd be considered, given that the selected approach strongly affects the required thermal conditions of a building.

关键词： Passive cooling Reflective roof Radiative roof Southeast Asia Tropical houses

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The Distribution of Riparian Corridor Plants and the Relations to River Water Salinity along Perai River,Penang,malaysia

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湿地科学 2010年第1期8卷 48-56页

作者： Siti Nurfazilah abdul rahman Johan Ismail mashhor mansor School of Biological Sciences Universiti Sains Malaysia Department of Animal Science and Fishery Faculty of Agriculture and Food SciencesUniversiti Putra Malaysia Sarawak Bintulu Campus

Ecological surveys were carried out to investigate the distribution and characterization of riparian corridor plants along the Perai River,Penang,malaysia from July 2007 to march *** were design to represent horizon-tal sections of the river starting from the river mouth towards the upper reaches for 20 km.A total of 84 species of plants from 30 families were *** consisted of 28 species of standing plants(plants with height of more than 1 m)and 56 species of weedy plants(plants with height of less than 1 m).Standing plants consisted of ferns,palms,herbs,shrubs and mangroves while weedy plants comprised of aroids,grasses,sedges and broad leaf *** abundance and dominance for each zone were relatively *** species was determined using Important Species Index(ISI).Based on ISI,the important species of standing plants were Sonneratia alba,Acrostichum aureum,Nypa fruti-cans,Avicennia marina,Rhizophora apiculata,Acrostichum speciosum and Rhizophora *** plants were dominated by mikania micrantha,Cryptocoryne ciliata,Wedelia trilobata and Asystasia *** distribution of the corridor plant species was closely related to the pattern of river water salinity *** distribution of mangrove species with tolerance and adaptation to seawater appeared as follows:Avicennia marina,Rhizophora apiculata,Rhizo-phora mucronata,Sonneratia alba,Nypa fructicans,Acrostichum aureum and Acrostichum speciosum.

关键词： riparian corridor plants mangrove species weedy species river estuary malaysia

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Radionuclide concentrations in sand samples from riverbanks of muzaffarabad,Azad Kashmir

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Nuclear Science and Techniques 2018年第7期29卷 103-115页

作者： abdul Razzaq Khan muhammad Rafique abdul Jabbar Saeed Ur rahman muhammad Ikram Shahzad muhammad Ejaiz Khan mulaika Yasin Department of Physics University of Azad Jammu andKashmir MuzaffarbadAzad Kashmir 13100Pakistan Health Physics Division Pakistan Institute of NuclearScience and Engineering(PINSTECH)NiloreIslamabad 45650Pakistan Department of medical Physics Nuclear MedicineOncologyand Radiotherapy InstituteIslamabadPakistan Physics Division Directorate of SciencePINSTECHP.O.NiloreIslamabad 45650Pakistan

This paper presents the results of a radiological risk assessment arising from the presence of naturally occurring radionuclides in sand samples from three riverbanks in *** mean values obtained for 232 Th,226 Ra,and 40 K were found to be 44.58 ± 3.34,48.25 ± 1.77,and 239.92 ± 22.73 Bq kg^(-1),*** assess the uniformity of exposure,the radium equivalent activity(Raeq) was calculated and was found to be130.47 ± 8.29 Bqkg^(-1).The current reported value for Raeqis lower than the maximum permissible value,that is,370 Bq kg^(-1),and equivalent to a gamma dose of1.5 m Svy^(-1).To investigate the possible contribution to health risks of alpha particle exposure,the radon exhalation rate(RER) from the sand samples was *** mean RER for all the samples was found to be335 m Bq m-^(2) h^(-1).About 43% of the samples were found to have an indoor excess lifetime cancer risk value slightly higher than recommended safety limit of 1,as proposed by the ICRP.A normalized parameter,the equivalent multiplicative factor,was defined and used to compare the current results with the findings of studies performed in other *** findings are relevant to both human health and future environmental radiation monitoring.

关键词：放射性核种样品克什米尔河岸风险评价调查结果 226Ra gamma

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