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Symmetry properties of tetraammine platinum(II) with C_(2v) and C_(4v) point groups

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Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2005年第3期6卷 222-226页

作者： MOGHANI Ghorban Ali ASHRAFI Ali Reza HAMADANIAN masood Department of Mathematics Payame Noor University Tehran IranDepartment of MathematicsUniversity of Kashan Kashan IranDepartment of Chemistry University of Kashan Kashan Iran

Let G be a weighted graph with adjacency matrix A=[aij]. An Euclidean graph associated with a molecule is defined by a weighted graph with adjacency matrix D=[dij], where for i≠j, dij is the Euclidean distance between the nuclei i and j. In this matrix dii can be taken as zero if all the nuclei are equivalent. Otherwise, one may introduce different weights for different nuclei. Balasubramanian (1995) computed the Euclidean graphs and their automorphism groups for benzene, eclipsed and staggered forms of ethane and eclipsed and staggered forms of ferrocene. This paper describes a simple method, by means of which it is possible to calculate the automorphism group of weighted graphs. We apply this method to compute the symmetry of tetraammine platinum(II) with C2v and C4v point groups.

关键词： Weighted graph Euclidean graph Tetraammine platinum(II)

Metabolic dysfunction-associated fatty liver disease and low muscle strength: A comment

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World Journal of Gastroenterology 2024年第17期30卷 2371-2373页

作者： masood Muhammad Karim Amna Subhan Butt Department of Gastroenterology The Aga Khan University HospitalKarachi 74800SindhPakistan Department of Medicine Aga Khan University HospitalKarachi 74800Pakistan

The diagnosis of non-alcoholic fatty liver disease(NAFLD)and metabolic dysfunction-associated fatty liver disease only on the basis of laboratory parameter score such as Hepatic Steatosis Index which includes liver enzymes,gender,basal metabolic index,and presence of diabetic mellitus is not sufficient to exclude other causes of deranged liver enzymes especially medications and autoimmune related liver *** the guideline suggests ultrasound is the preferred first-line diagnostic procedure for imaging of NAFLD,as it provides additional diagnostic information and the combination of biomarkers/scores and transient elastography might confer additional diagnostic accuracy and evident from previous similar studies too.

关键词： Non-alcoholic fatty liver disease Metabolic dysfunction associated fatty liver disease Low muscle strength Hepatic Steatosis Index Letter to the editor

Two loop low temperature corrections to electron self energy

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Chinese Physics C 2011年第7期35卷 608-611页

作者： Mahnaz Q. Haseeb Samina S. masood Department of Physics COMSATS Institute of Information Technology Islamabad Pakistan Department of Physics University of Houston Clear Lake Houston TX 77058

We recalculate the two loop corrections in the background heat bath using real time formalism. The procedure of the integrations of loop momenta with dependence on finite temperature before the momenta without it has been followed. We determine the mass and wavefunction renormalization constants in the low temperature limit of QED, for the first time with this preferred order of integrations. The correction to electron mass and spinors in this limit is important in the early universe at the time of primordial nucleosynthesis as well as in astrophysics.

关键词： renormalization finite temperature field theory electron self energy two-loop corrections

Symmetries of boundary layer equations of power-law fluids of second grade

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Acta Mechanica Sinica 2008年第6期24卷 661-670页

作者： Mehmet Pakdemirli Yi■it Aksoy Muhammet Yürüsoy Chaudry masood Khalique Department of Mechanical Engineering Celal Bayar University45140 MuradiyeManisaTurkey Technical Education Faculty Afyon Kocatepe UniversityAfyonTurkey Department of Mathematical Sciences International Institute for Symmetry Analysis and Mathematical ModelingNorth-West UniversityMafikeng CampusPrivate Bag X 2046Mmabatho 2735South Afiica

A modified power-law fluid of second grade is considered. The model is a combination of power-law and second grade fluid in which the fluid may exhibit normal stresses, shear thinning or shear thickening behaviors. The equations of motion are derived for two dimensional incompressible flows, and from which the boundary layer equations are derived. Symmetries of the boundary layer equations are found by using Lie group theory, and then group classification with respect to power-law index is performed. By using one of the symmetries, namely the scaling symmetry, the partial differential system is transformed into an ordinary differential system, which is numerically integrated under the classical boundary layer conditions. Effects of power-law index and second grade coefficient on the boundary layers are shown and solutions are contrasted with the usual second grade fluid solutions.

关键词： Power-law fluid of second grade Boundarylayers Lie group theory

Cloud authorization： exploring techniques and approach towards effective access control framework

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Frontiers of Computer Science 2015年第2期9卷 297-321页

作者： Rahat masood Muhammad Awais SHIBLI Yumna GHAZI Ayesha KANWAL Arshad ALI School of Electrical Engineering and Computer Science (SEECS) National University of Sciences and Technology (NUST) Islamabad - 44000 Pakistan

Despite the various attractive features that Cloud has to offer, the rate of Cloud migration is rather slow, pri- marily due to the serious security and privacy issues that exist in the paradigm. One of the main problems in this regard is that of authorization in the Cloud environment, which is the focus of our research. In this paper, we present a systematic analysis of the existing authorization solutions in Cloud and evaluate their effectiveness against well-established industrial standards that conform to the unique access control require- ments in the domain. Our analysis can benefit organizations by helping them decide the best authorization technique for deployment in Cloud; a case study along with simulation re- sults is also presented to illustrate the procedure of using our qualitative analysis for the selection of an appropriate tech- nique, as per Cloud consumer requirements. From the results of this evaluation, we derive the general shortcomings of the extant access control techniques that are keeping them from providing successful authorization and, therefore, widely adopted by the Cloud community. To that end, we enumer- ate the features an ideal access control mechanisms for the Cloud should have, and combine them to suggest the ultimate solution to this major security challenge - access control as a service （ACaaS） for the software as a service （SaaS） layer. We conclude that a meticulous research is needed to incorpo- rate the identified authorization features into a generic ACaaS framework that should be adequate for providing high level of extensibility and security by integrating multiple accesscontrol models.

关键词： authorization access control software as a ser-vice extensible access control markup language identity &access management cloud security

Enhanced room temperature ferromagnetism in Cr-doped ZnO nanoparticles prepared by auto-combustion method

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Journal of Semiconductors 2018年第4期39卷 20-27页

作者： Khizar-ul Haq M.Irfan Muhammad masood Murtaza Saleem Tahir Iqbal Ishaq Ahmad M.A.khan M.Zaffar Muhammad Irfan Department of Physics Mirpur University of Science and Technology (MUST) Department of Physics SBASST Lahore University of Management Sciences Experimental Physics Labs National Centre for Physics Quaid-e-Azam University Department of Physics University of Azad Jammu and Kashmir Muzaffarabad

Zn1-xCrxO （x = 0.00, 0.01, 0.03, 0.05, 0.07, and 0.09） nanoparticles were synthesized, by an auto-com- bustion method. Structural, optical, and magnetic characteristics of Cr-doped ZnO samples calcined at 600 ℃ have been analyzed by using X-ray diffraction （XRD）, field emission scanning electron microscope （FESEM）, UV-Vis spectroscopy and vibrating sample magnetometer （VSM）. The XRD data confirmed the hexagonal wurtzite structure of pure and Cr-doped ZnO nanoparticles. The calculated values of grain size using Scherrer＇s formula are in the range of 30.7-9.2 nm. The morphology of nanopowders has been observed by FESEM, and EDS results con- firmed a systematic increase of Cr content in the samples and clearly indicate with no impurity element. The band gaps, computed by UV-Vis spectroscopy, are in the range of 2.83-2.35 eV for different doping concentrations. By analyzing VSM data, significantly enhanced room temperature ferromagnetism is identified in Cr-doped ZnO samples. The value of magnetization is a 12 times increased of the value reported by Daun et al. （2010）. Room temperature ferromagnetism of the nanoparticles is of vital prominence for spintronics applications.

关键词： Cr-doped ZnO auto-combustion DMS ferromagnetism

Study of narrow waterways congestion based on automatic identification system(AIS)data:A case study of Houston Ship Channel

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Journal of Ocean Engineering and Science 2022年第6期7卷 578-595页

作者： masood Jafari Kang Sepideh Zohoori Maryam Hamidi Xing Wu Research Assistant Department of Industrial EngineeringLamar University2607 Cherry Engineering BuildingBeaumontTX 77710United States Assistant Professor Department of Industrial EngineeringCenter for Advances in Port ManagementLamar University2210 Cherry Engineering BuildingBeaumontTX 77710United States Associate Professor Department of Civil and Environmental EngineeringLamar University2032 Cherry Engineering BuildingBeaumontTX 77710United States

Using automatic identification system(AIS)data,this article first has extended the definition of three widely used roadway congestion indices to maritime transportation systems(MTS),traffic speed index(TSI),traffic rate index(TRI),and dwell time index(DTI).Next,a methodology is developed to measure the indices based on AIS data,considering various factors,including path geometry,time of day,and the type and size of vessels,and finally the method has been applied to the AIS data of the Houston Ship Channel(HSC)to evaluate the applicability in real *** results show that although average TSI and TRI cannot represent waterway congestion,the real-time values(rather than the average)at the micro level can help finding location,time,and severity of traffic ***,while TSI and TRI have shortcomings,both average and real-time dwell time index(DTI)can quantify traffic congestion and highlight severity in different waterway segments for different types of *** congestion happens at some narrow waterways,vessels need to wait at sea buoy or docks,thus dwell time index(DTI)can quantify traffic congestion better than in-transit indices such as travel speed,*** to HSC DTI,most tankers experience long waiting times at the sea buoy and Galveston Bay,while cargo vessels experience delays at Bayport and Barbour’s Cut *** paper helps the decision-makers quantify congestion in different sections of a waterway and provides measures to compare congestion for national competing projects at different waterways.

关键词： Maritime transport system Waterway congestion Quantifying congestion AIS data Houston Ship Channel

Enhanced Best Fit Algorithm for Merging Small Files

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Computer Systems Science & Engineering 2023年第7期46卷 913-928页

作者： Adnan Ali Nada masood Mirza Mohamad Khairi Ishak School of Electrical and Electronic Engineering Universiti Sains Malaysia(USM)Nibong TebalPulau Pinang14300Malaysia University College United Arab Emirates UniversityAl AinUAE

In the Big Data era,numerous sources and environments generate massive amounts of *** enormous amount of data necessitates specialized advanced tools and procedures that effectively evaluate the information and anticipate decisions for future *** is used to process this kind of *** is known to handle vast volumes of data more efficiently than tiny amounts,which results in inefficiency in the *** study proposes a novel solution to the problem by applying the Enhanced Best Fit Merging algorithm(EBFM)that merges files depending on predefined parameters(type and size).Implementing this algorithm will ensure that the maximum amount of the block size and the generated file size will be in the same *** primary goal is to dynamically merge files with the stated criteria based on the file type to guarantee the efficacy and efficiency of the established *** procedure takes place before the files are available for the Hadoop ***,the files generated by the system are named with specific keywords to ensure there is no data loss(file overwrite).The proposed approach guarantees the generation of the fewest possible large files,which reduces the input/output memory burden and corresponds to the Hadoop framework’s *** findings show that the proposed technique enhances the framework’s performance by approximately 64%while comparing all other potential performance-impairing *** proposed approach is implementable in any environment that uses the Hadoop framework,not limited to smart cities,real-time data analysis,etc.

关键词： Big data Hadoop MapReduce small file HDFS

Mode of Occurrence and Mineralogy of Northern Khetri Copper Deposits, Jhunjhunu District, Rajasthan

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Natural Resources 2018年第12期9卷 389-403页

作者： masood Ahmed Mohd Shaif Farhat Naseem Siddiquie Rajiullah khan Department of Geology Aligarh Muslim University Aligarh India

Copper deposits in Khetri copper belt are hosted in the proterozoic sequence of rocks belonging to Ajabgarh group of Delhi supergroup situated in foot hill zone of Aravalli mountain range North-West, India. Khetri copper belt is about 100?km long NE-SW trending metallogenic province, starting from Singhana in the north to Sangarava in the south. The study area is the northern Khetri copper belt 190 km SW of Delhi,?the capital city of India. In the present work an attempt has been made to determine the mode of occurrence and nature of mineralization with special emphasis on mineragraphic study of copper ores. The ore bodies are found in the form of multiple lodes regionally but locally in the forms of veins, stringers, dissemination, sporadic, cavity filling and replacement. Enriched mineralized zones are localized along the contact of Alwar and Ajabgarh group. Copper, the main entity in the belt occurs?dominantly as sulphides, oxides, carbonates and sulphosalts mineral hosted in pelitic and psammitic rocks. Pyrrhotite, pyrite, magnetite and sphalerite are the other ore mineral associated with the copper ore in a considerable amount. From the textural, structural and multigenerational minerals, mineral assemblage studies,?it is assumed that deposit has undergone metamorphism and multi-stage mineralization. Replacement has a profound influence on mineralization in the northern Khetri copper deposits.

关键词： Copper Ores Mineralogy Khetri Rajasthan