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DEFICIENCY ZERO NON-METACYCLIC p-GROUPS OF ORDER LESS THAN 1000
Jamali, Ali-Reza 한국전산응용수학회 2004 Journal of applied mathematics & informatics Vol.16 No.1
There are 49 non-metacyclic p-groups of order less than 1000 with trivial Schur multiplier. In this paper we give a list of deficiency zero presentations for these groups.
Ali Akbar Jamali,Ali Esmailian,Sadegh Mokhtarisabet,Songtang He 대한공간정보학회 2023 Spatial Information Research Vol.31 No.6
This article explores two different methods, vector re-classification and raster fuzzification, for choosing the best railway routes between Shiraz and Yazd in Iran using spatial information systems. The right use of these systems can have significant economic benefits for railways, allowing for better decision-making and more efficient resource allocation. Topography analysis in spatial information systems, including calculating the shortest and optimal route, is a practical and valuable application. The study used satellite images and Google Earth Engine to extract vector or raster maps for the cost-path algorithm. The results of the raster fuzzy approach suggested alternative A (111 km, slope 2%) and alternative B (115 km, slope 25%), while the vector reclassification approach showed alternative C (131 km, slope 28%). After employing semi and non-structure problem-solving, as well as profile and rout topographic analysis, path A was selected as the optimal route. The study concluded that the raster fuzzy approach was more effective in finding railway paths and could provide better results for decision-makers in similar projects.
Deficiency zero non-metacyclic p-groups of order less than 1000
Ali-Reza Jamali 한국전산응용수학회 2004 Journal of applied mathematics & informatics Vol.16 No.-
There are 49 non-metacyclic p-groups of order less than 1000 with trivial Schur multiplier. In this paper we give a list of deficiency zero presentations for these groups.
Optical Spectroscopic Analysis Techniques to Detect Elemental Profile of Human Teeth Dentine
Saifullah Jamali,Muhammad Aslam Khoso,Irfan Ali Sanjrani,Hussain Saleem,Tariq Ali Siyal,Muhammad Ashraf,Mansoor Ahmed Memon,Ghulam Murtaza,Zahid Hussain Arain,Zaheer Ahmed Ujjan,Muhammad Niaz Laghari International Journal of Computer ScienceNetwork S 2023 International journal of computer science and netw Vol.23 No.3
Numerous articles under the study and the examination of heavy metals in human teeth have been published in recent years. The heavy metal poisoning is a widespread issue emerged in toxicology area these days. It has been discovered that long-term exposure to heavy metals typically present in traces, in our everyday meals, drinking water, and in the environment as pollution causes heavy metal poisoning in human beings. Industrial effluents, Coal and Oil, as well as a variety of consumer items, such as cosmetics, can all cause this type of exposure. Teeth, which are often thought of as exoskeleton parts, store heavy metals with a high affinity and represent long-term exposure information. In this study, we have chosen and examined the sections of dentine instead, then examined the entire tooth. We have combined the work done on the examination of heavy metals in human teeth using several instrumental approaches e.g. "Optical Spectroscopic Techniques" to detect elemental profile of human teeth in the current study.
Abbas Jamali,Farzaneh Shemirani,Ali Morsali 한국공업화학회 2019 Journal of Industrial and Engineering Chemistry Vol.80 No.-
The adsorptive removal of hazardous materials of organophosphorus insecticides by adsorbents withhigh adsorption capacities is highly desirable. In this work, we present the removal of two representativeorganophosphorus insecticides, Dichlorvos and Metrifonate by two exceptionally stable Zr-based MOFsof UIO-66 and UIO-67. The MOFs were characterized by TGA, FTIR, SEM, XRD, BET and XPS analyses. Effectof some parameters such as adsorbent dose, contact time, pH and ionic strength on the removal efficiencyof Dichlorvos and Metrifonate were investigated. The mechanism of interaction was carefullyinvestigated by XPS and FTIR. The isotherm and kinetic data were accurately described by the Langmuirand pseudo-second-order models. The adsorption capacities in UIO-67 approached as high as571.43 mg g 1 for Dichlorvos and 378.78 mg g 1 for Metrifonate, which were much higher than UIO-66. Compared to other works this work has shown better adsorption capacity and cost efficient. Thecalculated removals for the samples are in the range from 97.8 to 99%, indicating that the UIO-67 can beapplied for removal of Dichlorvos and Metrifonate in real samples.
Mechanical Properties of Multiscale Graphene Oxide/Basalt Fiber/Epoxy Composites
Nahid Jamali,Hamed Khosravi,Ali Reza Rezvani,Esmaeil Tohidlou 한국섬유공학회 2019 Fibers and polymers Vol.20 No.1
This work was carried out to study the effects of silane functionalization of graphene oxide (GO) nanoplatelets and their loadings on the mechanical properties of basalt fiber (BF)/epoxy composites. At first, the GO nanoplatelets were organically modified by grafting of N-(3-trimethoxysilylpropyl)ethylenediamine (3-TMSPED) compound. The Fourier transform infrared spectroscopy (FTIR), energy-dispersive X-ray spectroscopy (EDX), and thermal gravimetric analysis(TGA) results demonstrated that silane compound can be covalently grafted to the surface of GO. The multiscale silanized graphene oxide (SGO)/BF/epoxy composites with various weight percentages of SGO in the matrix (0-0.5 wt.% in the step of 0.1) were fabricated. According to the experimental data, the 0.4 wt.% SGO-filled composite showed the maximum improvement by 18 %, 59 %, and 61 % in the tensile, flexural and compressive strengths of BF/epoxy composite, while the maximum improvement by 46 %, 54 %, and 66 % in the tensile, flexural and compressive moduli, respectively was observed for the 0.5 wt.% SGO-filled composite. Additionally, the SGO was more effective in mechanical property enhancement of fibrous composites in comparison with GO, due to its silane-functionalization. From the fracture surface examination of the specimens, it was found that the incorporation of GO or SGO improved the BF-epoxy interfacial bonding. A theoretical model based on Euler-Bernoulli beam-based method was utilized to predict the compressive properties of composites, which was in an excellent agreement with the experimental data.
Seyed Ali Jafari,Abbas Jamali 한국화학공학회 2016 Korean Journal of Chemical Engineering Vol.33 No.4
Packed-bed column process efficiency for cadmium adsorption from aqueous solution was investigated under different bed heights (2.6 to 7.5 cm) and feed flow rates (15 to 30 ml min−1). The column was filled with brown seaweed, Sargassum angustifolium. Three simplified models, including Bed Depth Service Time, Thomas, and Yoon- Nelson were employed for describing the experimental breakthrough curves as well as achieving design parameters. Bed lifetime was also evaluated in several consecutive sorption-desorption cycles. Cadmium concentration of 0.005mg l−1, as a standard limit for potable water, was considered as the breakthrough concentration. The maximum column performance was achieved 81% at 7.5 cm bed length and flow rate of 15 ml min−1. Indeed, increasing the bed height increased the sorption performance and service time, while increasing the feed flow rate had a negative effect. Maximum sorption capacity value remained almost constant by the bed height changes; however, increase in the feed flow rate slightly decreased it. The modeling results revealed that the Yoon-Nelson model was more accurate than Thomas for describing the experimental breakthrough data, especially at low flow rates. Column service time predictions were surprisingly achieved using the Bed Depth Service Time model even at extrapolations. 20% reduction in column adsorption efficiency was observed at the end of four consecutive sorption-desorption cycles; however, desorption efficiencies were achieved more than 99% in each cycle.
Cadmium removal from aqueous solution by brown seaweed, Sargassum angustifolium
Seyed Ali Jafari,Abbas Jamali,Asma Hosseini 한국화학공학회 2015 Korean Journal of Chemical Engineering Vol.32 No.10
Four kinds of indigenous seaweed were employed for assessing their soluble cadmium biosorption performance. Sargassum angustifolium revealed the greatest capacity in the range of equilibrium cadmium concentration lower than 0.5mmol l−1. It was further examined by optimization, equilibrium, kinetic and thermodynamic studies. It was found that1 g l−1 biosorbent at initial pH of 6 and 38 oC revealed the highest Cd2+ uptake. Kinetic studies revealed that the Cd2+ biosorption included a two-stage mechanism with an initial rapid stage during the first 30 min where ion exchange was the dominant mechanism. The process gradually reached equilibrium after 40-50 min of contact where the metal adsorption occurred too low due to the intraparticle diffusion. However, it was not the sole rate-limiting step. The pseudo-second order kinetic model, unlike the pseudo-first order, excellently described the experimental data in the whole range of contact time. The Langmuir isotherm model was more successful in describing the equilibrium data than the Freundlich and D-R models. Using this isotherm model, a relationship was proposed to predict the dose of biosorbent needed for removing specific initial cadmium concentration from aqueous solution or to meet a desire equilibrium cadmium concentration. The spontaneity and endothermicity as well as increasing randomness at the solid/solution interface during the biosorption were revealed by means of the thermodynamic studies.
Saeed Zaman Jamali,Muhammad Omer Khan,Syed Basit Ali Bukhari,Muhammad Mehdi,Gi-Hyeon Gwon,Chul-Ho Noh,Chul-Hwan Kim 한국조명·전기설비학회 2017 조명·전기설비학회논문지 Vol.31 No.10
Low voltage DC (LVDC) distribution systems are gaining attention as customer loads are shifting towards power electronics-based equipment. The DC distribution system has the advantage of supplying power to these power electronic-based loads with high efficiency and without undergoing an energy conversion process. However, the power electronic components used in the LVDC distribution system are vulnerable during short-circuit faults. These components must be protected during the short-circuit faults for a safe and reliable operation. Therefore, this paper proposes a protection technique based on DC short-circuit fault current behavior. The fault is detected via a superposition principle. A fault current limiter (FCL) is used to suppress DC fault strength and reduce the stress from the circuit breaker. Finally, a solid state circuit breaker (SSCB) is used to isolate the fault point. The simulation results show that the proposed protection Scheme operates quickly enough as per expectations to avoid damage to sensitive power electronic devices.