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TOPOLOGICAL CHARACTERIZATION OF CERTAIN CLASSES OF ALMOST DISTRIBUTIVE LATTICES
RAFI, N.,RAO, G.C. The Korean Society for Computational and Applied M 2015 Journal of applied mathematics & informatics Vol.33 No.3
Proved that the two topoloies(spectral topology and D−topology) coincide on SpecR, MaxR and MinspecR iff R is complemented, normal and stone ADL respectively.
N. R. Khalid,Samavia Ilyas,Faisal Ali,Tahir Iqbal,M. Rafi que,Muhammad Imran,Mohammad A. Assiri 대한금속·재료학회 2024 ELECTRONIC MATERIALS LETTERS Vol.20 No.1
The organic pollutants are polluting the drinking water so, it is a fi eld of great interest to clean this water by using somesophisticated materials. For this purpose, the nanostructured materials are playing vital role to attain sustainable and puredrinking water by degrading organic pollutants. The synthesis of such photocatalytic material without using harmful chemicals,is one of the important existing challenges. Thus, to tackle this challenge, we have prepared green synthesized Sn-dopedWO 3 nanomaterials by varying the content of Sn from 2 to 6 wt% and assisting from moringa oleifera seeds’ extract. Thecrystal structure, morphology, optical and photoluminescence properties of as prepared samples were investigated throughx-ray diff raction (XRD), scanning electron microscopy (SEM), ultraviolet visible spectroscopy (UV-vis) and photoluminescencespectroscopy (PL) techniques. Among of as prepared samples, the 4Sn-WO 3 (4 wt% Sn doped WO 3 ) sample hasexhibited the reduced optical band gap value i.e. 2.80 eV than 3.02 eV for pure WO 3 sample. This optimized sample has alsoshown the lowest e-h recombination rate. To test the photocatalytic performance, the methylene blue was used as a modeldye. Out of all samples, 4Sn-WO 3 sample has shown 95% degradation activity against this water pollutant. These fi ndingsspecify that the as mentioned novel photocatalytic nanomaterial will provide a signifi cant advancement in the environmentalfi eld to degrade the organic pollutants.
Shariati, Mahdi,Rafie, Shervin,Zandi, Yousef,Fooladvand, Rouhollah,Gharehaghaj, Behnam,Mehrabi, Peyman,Shariat, Ali,Trung, Nguyen Thoi,Salih, Musab N.A.,Poi-Ngian, Shek Techno-Press 2019 Advances in concrete construction Vol.8 No.3
Although applying self-consolidating concrete (SCC) in many modern structures is an inevitable fact, the high consumption of cement in its mixing designs has led to increased production costs and adverse environmental effects. In order to find economically viable sources with environmentally friendly features, natural pozzolan pumice and blast furnace slag in 10-50% of replacement binary designs have been investigated for experiments on the properties of fresh concrete, mechanical properties, and durability. As a natural pozzolan, pumice does not require advanced equipment to prepare for consumption and only needs to be powdered. Pumice has been the main focus of this research because of simple preparation. Also to validate the results, in addition to the control specimens of each design, fly ash as a known powder has been evaluated. Moreover, ternary mixes of pumice and silica fume were investigated to enhance the obtained results of binary mixes. It was concluded that pumice and slag powders indicated favorable performance in the high percentage of replacement.
Comparison of Numerical Simulation and Experiment of Designed Vortex Type Micro hydro Water Turbine
Ema Amalia,Hendarko,Muhammad N Hamzah,Faridl A Maulana,Farhan H Budisatrio,Muhammad Rafie,Mochammad A Moelyadi 한국유체기계학회 2022 International journal of fluid machinery and syste Vol.15 No.3
Vortex type's micro hydro water turbine is a new technology for harvesting energy from water which the performance is still providing more c hallenge . After h aving designed the vortex type water turbine in previous work, a laboratory scale experimental apparatus is built to prove the design and to val idate numerical simulations of the turbine The important design parameters such as torque, powe r, and efficiency are considered. It is found that the CFD results gives higher t orque , power, and efficiency compared to experiments results with a similar tren d This is due to no feature in the used CFD software in evaluating mechanical friction that ha ppened in experim ents device , for more specific in torque meter used Head of CFD for discharge of 2.7 L/s and 2.8 L/s are 0.06 m and 0.06 m while from experimen t is 0.07 m and 0.072 respectively. A NSYS has been used for CFD simulation.
FALLING FUZZY FILTERS IN BE-ALGEBRAS
Ravi Kumar Bandaru,N. Rafi,Bijan Davvaz 충청수학회 2017 충청수학회지 Vol.30 No.2
The notion of falling fuzzy filters of a BE-algebra is introduced based on the theory of falling shadows and fuzzy sets. Relation between fuzzy filters and falling fuzzy filters are presumed and characterized them interms of subsets of a sample space.
FALLING FUZZY FILTERS IN BE-ALGEBRAS
Bandaru, Ravi Kumar,Rafi, N.,Davvaz, B. Chungcheong Mathematical Society 2017 충청수학회지 Vol.30 No.2
The notion of falling fuzzy filters of a BE-algebra is introduced based on the theory of falling shadows and fuzzy sets. Relation between fuzzy filters and falling fuzzy filters are presumed and characterized them interms of subsets of a sample space.
Fuzzy $r$-ideals in $\Gamma$-incline
M. Murali Krishna Rao,B. Venkateswarlu,N. Rafi 원광대학교 기초자연과학연구소 2019 ANNALS OF FUZZY MATHEMATICS AND INFORMATICS Vol.17 No.3
In this paper, we introduce the notion of fuzzy ideal, fuzzy $k$-ideal and fuzzy $r$-ideal in $\Gamma$-incline. We study the properties of fuzzy ideals, fuzzy $k$-ideals and fuzzy $r$-ideals in $\Gamma$-incline.
Fire performance curves for unprotected HSS steel column
M. Shahria Alam,A.H.M. Muntasir Billah,Shahriar Quayyum,Mahmud Ashraf,A.N.M. Rafi,Ahmad Rteil 국제구조공학회 2013 Steel and Composite Structures, An International J Vol.15 No.6
The behaviour of steel column at elevated temperature is significantly different than that atambient temperature due to its changes in the mechanical properties with temperature. Reported literaturesuggests that steel column may become vulnerable when exposed to fire condition, since its strength andcapacity decrease rapidly with temperature. The present study aims at investigating the lateral load resistanceof non-insulated steel columns under fire exposure through finite element analysis. The studied parametersinclude moment-rotation behaviour, lateral load-deflection behaviour, stiffness and ductility of columns atdifferent axial load levels. It was observed that when the temperature of the column was increased, there wasa significant reduction in the lateral load and moment capacity of the non-insulated steel columns. Moreover,it was noted that the stiffness and ductility of steel columns decreased sharply with the increase intemperature, especially for temperatures above 400°C. In addition, the lateral load capacity and the momentcapacity of columns were plotted against fire exposure time, which revealed that in fire conditions, thenon-insulated steel columns experience substantial reduction in lateral load resistance within 15 minutes offire exposure.