bluuebunny/crossref_metadata_2025_split huggingface dataset:
Performance Analysis of Secure Group Key Mechanism in Mobile Ad Hoc Networks
Authors: C Shanmuganthan , P Raviraj 
Published: April 2019

Mobile Ad-hoc network (MANET) is an effective network administration framework that encourages trading data between remote mobile devices, without the utilization of remote access points and base stations. Security has become a major concern in mobile ad hoc networks. Providing security is the very big challenge in MANET, due to lack of infrastructure, frequent host mobility, and unreliable wireless media. We are using cryptography techniques to provide secure communication in mobile ad hoc networks. To provide security using cryptography, key management is playing a vital role. The key management includes key generation, storage, distribution, revocation, and updating. The authorized group key distributions are the difï¬cult task in MANET. Various types of key management protocols are symmetric, asymmetric, group and hybrid. In a group key management, when a member joins or leaves the group, it needs to generate a new key immediately to maintain authentication or secrecy. The group key management is categorized into three types such as centralized, decentralized and distributed. In this paper, we analyze the performance of different group key management protocol scheme based on some important measure like reliability, limitations, services, storage cost, scalability, intermediate operation, and vulnerabilities. Finally, different categories of key management protocols compared and the results are tabulatedÂ Â
A Novel method to represent Access Tree structure by Context Free Grammar with and-or graph in Key Policy based Attribute based Encryption
Authors: Senthil Kumar K. , Malathi D. 
Published: April 2019

Important and sensitivity data of users in a third party managed internet or cloud always pose various security as well as privacy issues. Attribute-based encryption (ABE) is a pleasant trend in the literature which addresses above problem in an efficient way, and provides data security and fine-grained access control in a decentralized manner,. Key-policy attribute-based encryption (KP-ABE) is an important type of ABE, in which user can decrypt his message with a set of attributes and private keys are embedded with a access control structure which defines which cipher textÂ an user can be allowed to decrypt. In this paper we use a probabilistic context free grammar with an And-Or structure to represent access control structure. And-Or graph has high expressive power hence access control structure can be represented in an efficient manner.Â Â
âˆ†*-Locally Continuous Functions and âˆ†*-Locally Irresolute Maps in Topological Spaces
Authors: Meena K. , Sivakamasundari K. 
Published: April 2019

The objective of the paper is to introduce a new types of continuous maps and irresolute functions called âˆ†*-locally continuous functions and âˆ†*-irresolute maps in topological spaces. The comparative study between these functions with other existing maps is discussed in this paper. Some significant results are also proved as an application of new spaces namely, âˆ†*-submaximal space and Â â€“space. Further the characteristics of these maps under composition maps are exhibited.Â Â
The Medium Domination Number of Lexico Product of Two Paths P2 and Pn
Authors: Ramachandran M. , Parvathi N. 
Published: April 2019

Graph theory is a vibrant area in both applications and hypothetical. Graphs can be utilized as a demonstrating device for many problems of realistic consequence. It can be given out as mathematical models to identify a proper graph-theoretic problem. Domination is a hasty sprouting area of research in graph theory, and its various applications are distributed computing and societal networks. Duygu Vargor and Pinar Dundar [1] computed the idea of medium domination number exploited to scrutinize the pair of vertices. This paper study as explored the medium domination number of lexico product of two paths P2 and Pn.Â Â
An M/M/1 Queue with Working Vacation and Vacation Interruption Under Bernoulli Schedule
Authors: Manoharan P. , Ashok A. 
Published: April 2019

This work deals with M/M/1 queue with Vacation and Vacation Interruption Under Bernoulli schedule. When there are no customers in the system, the server takes a classical vacation with probability p or a working vacation with probability 1-p, where . At the instants of service completion during the working vacation, either the server is supposed to interrupt the vacation and returns back to the non-vacation period with probability 1-q or the sever will carry on with the vacation with probability q. When the system is non empty after the end of vacation period, a new non vacation period begins. A matrix geometric approach is employed to obtain the stationary distribution for the mean queue length and the mean waiting time and their stochastic decomposition structures. Numerous graphical demonstrations are presented to show the effects of the system parameters on the performance measures.Â Â
A Monograph on Nonlinear Regression Models
Authors: Mahaboob B. , Venkateswarlu B. , Narayana C. , Ravi sankar J. , Balasiddamuni P. 
Published: April 2019

This research article uses Matrix Calculus techniques to study least squares application of nonlinear regression model, sampling distributions of nonlinear least squares estimators of regression parametric vector and error variance and testing of general nonlinear hypothesis on parameters of nonlinear regression model. Arthipova Irina et.al [1], in this paper, discussed some examples of different nonlinear models and the application of OLS (Ordinary Least Squares). MA Tabati et.al (2), proposed a robust alternative technique to OLS nonlinear regression method which provide accurate parameter estimates when outliers and/or influential observations are present. Xu Zheng et.al [3] presented new parametric tests for heteroscedasticity in nonlinear and nonparametric models.Â Â
A Comparative Study of Experimental and Theoretical Ultrasonic Velocity of Binary Liquid Mixtures Using Mathematical Methods
Authors: Gayathri A. , Venugopal T. , Venkatramanan K. 
Published: April 2019

A comparative study of ultrasonic velocities of binary liquid mixtures such as O-cresol+carbon tetrachloride, anisicaldehyde+methylacetate, anisicaldehyde+ethylacetate, having industrial applications are analysed at temperature 303K for different concentrations [0 to 1%]. In the present study experimental values are taken from literature and there values are compared with theoretical values obtained by various mathematical equations such as Nomotoâ€™s relation, VandealVangeal formula, Impedance relation, Raoâ€™s specific relation. Thus, the present study reveals the nature of interaction between component molecules in the mixtures and enables us to identify a suitable mathematical model for predicting the ultrasonic velocity various binary liquid mixtures.Â Â Â
Unsteady MHD Free Convection by Passing Cobalt Nanoparticles Past an Accelerated Vertical Plate Through Porous Medium of Ethylene Glycol
Authors: G. Vijaya Kumar A. , Vankudre M. , Mirajgaonkar N. , Bagwe K. 
Published: April 2019

This article studies , the effects of unsteadyÂ magneto-hydrodynamic boundary layer when cobalt nanoparticles where passed onto a vertical plate which is given an impulse by exponential acceleration through porous medium of ethylene glycol when thermal radiation is present ,parameters of absorption of heat and radiation, chemical reaction parameter, magnetic field in transverse direction are theoretically studied. We consider cobalt nanoparticles resembles to spherical structure and range of volume of nanoparticle concentration is basically less than or equal to 4%. Considering the boundary conditions we have formulated a governing equations of nanoparticles which is in the form of partial differential equations. The precise solutions for velocity, concentration and temperature profiles are obtained by plotting the graphs of the equations formed using Laplace Method using MATLAB software. This study of heat transfer in nanoparticles finds application in tribological aspect, biological fields dealing with molecular level cell interactions, improving thermal conductivity and commercial cooling applications. The most significant outcome of this study is found in the concentration profile where time is varied. We see that there is 68% decrease in concentration when the time interval chosen is 0.2, whereas the decrease is found to 55% when the interval is increased to 0.4 keeping the distance from vertical plate constant.Â Â
Magneto-Convective Boundary-Layer Flow of a Nanofluid Past Impulsive Vertical Plate with Inclined Magnetic Field.
Authors: G. Vijaya Kumar A. , Gopal Innani Rahul , R. Pawar Yash 
Published: April 2019

The following paper is a study of unsteady hydro-magnetic flow on a boundary layer over an impulsive nanofluid vertical plate in the sight of transverse magnetic field inclined at an angle. The considered fluid is a non-scattering medium and pressure gradient is described by Boussinesqâ€™s approximation and radiative heat flux in the equation of energy. Three types of nanofluids containing Al2O3 engine oil, Boron Engine oil and Graphite engine oil are considered by us. The partial differential equations are converted to dimensionless with particular dimensional quantities and then Laplace transform technique is used to get a closed form solution for velocity and temperature fields without any limits. From the obtained graphs, we studied the changes according to given values of nanofluids on the temperature, transverse velocity, skin-friction and the heat transfer rate at the surface of the wall.Â Â
MHD Flow of Carreau Liquid with Partial Slip and Newtonian Heating
Authors: Eswaramoorthi S. , Loganathan K. , Sivasankaran S. , Bhuvaneswari M. , Rajan S. 
Published: April 2019

This work deliberates the MHD flow of Carreau liquid past a stretching plate with thermal radiation, viscous dissipation and Joule heating. Additionally, partial velocity slip and Newtonian heating effects are included in our study. The similarity transformations are used to convert the governing dimensional partial differential equations into dimensionless ordinary differential equations. Homotopy analysis method (HAM) is employed to find the convergent series solutions of the governed non-linear ordinary differential equations. It is found that the magnetic field parameter slowdown the liquid motion and rises the liquid temperature. In addition, heat generation parameter enhances the thermal boundary layer thickness and chemical reaction parameter suppresses the solutal boundary layer thickness.Â Â
The Impulsive Neutral Integro-Differential Equations with Infinite Delay and Non-Instantaneous Impulses
Authors: Usha V. , Mallika Arjunan M. 
Published: April 2019

In this manuscript, we work to accomplish the Krasnoselskii's fixed point theorem to analyze the existence results for an impulsive neutral integro-differential equationsÂ with infinite delay and non-instantaneous impulses in Banach spaces. By deploying the fixed point theorem with semigroup theory, we developed the coveted outcomes.Â Â Â
Discrete Heat Equation model of Rod by Partial Fibonacci Difference Operator with shift values
Authors: Pinelas Sandra , Britto Antony Xavier G. , John Borg S. , Jaraldpushparaj S. 
Published: April 2019

Partial Fibonacci difference equation is introduced and subjected to investigation in discrete heat equation by having recourse to Fibonacci difference operator with shift values in this paper. By having Fourier law of cooling as its basis, the heat transfer in the long rod is investigated and the solutions obtained are validated by MATLAB.Â Â
Application of Soft Computing Techniques in Global Software Development: state-of-the-art Review
Authors: Iftikhar Asim , Musa Shahrulniza , Alam Muhammad , Mohd Suâ€™ud Mazliham , Mubashir Ali Syed 
Published: April 2019

Developing Software through a globally distributed team is a modern trend, which is not only cost effective but also yields best project results mitigating risk and increasing return on investment. This is easily achieved by ensuring through put in production is maintained at all times irrespective of the clock time and geographical boundaries. This shift of phenomenon is happening across the board as more and more companies use this as a strategic tool. Modern day technology makes this all possible, without compromising quality, coding practices and project management techniques. In this paper we have researched several papers (2008 to 2018) and understood the data for soft computing to provide a strong basis for future directionsÂ Â
Seismic Analysis of Reinforced Concrete Buildings in South of Iraq based on Different Codes
Authors: A. B. Al-Jassim Samir , Abdul Kareem Raheem Haider 
Published: April 2019

Buildings in south of Iraq were designed for gravity loads only. Recent studies showed that the Badra-Amarah fault at the Iraq-Iran boarder is an active fault and could suffer a major damage. Hence seismic evaluation of existing buildings is getting more importance. The objective of this paper is to assess the seismic performance of two reinforced concrete buildings with six floors each, one has a shear wall and the other has not. The concentrated plasticity with nonlinear time history is adopted for the analysis. The spectrum matching method is used to scale three time-acceleration records to the expected seismic level in the region. Â Three different codes are used for the analysis, the International building code-2012, the Uniform building code-1997 and the Iraqi seismic code-2017. Comparison of results showed that IBC-2012 gave the most conservative results in displacements, number and performance of plastic hinges and base shear. The Iraqi code gave the least values within 60% for the base shear and 18-50% for drifts. As a conclusion, the analyzed buildings are a little beyond the elastic level according to the Iraqi code, beyond the immediate occupancy level according to the UBC-1997 and near the collapse prevention level according to IBC-2012.Â Â
Hidden Rhythm in Residential Units with the Everyday Human Activity Residential Units in Aadhamiyah as A Case Study
Authors: Azzam Mahmood Nada , Mohammed Hussain Asmaa 
Published: April 2019

Meaning of home has been changed through time in relating human connection to his environment. We can notice the gap from the traditional models of housing to the modern models regarding the concept of house. The research aims and trying to explore the nature of this relationship and the transformations took place in changing the meaning of home. As a result, the main research problem has been identified as "lack of knowledge regarding the relationship between daily life rhythm and residential spaces today and the effect of physical space on human rhythm and its relation with the environment ". The research goals aim to identify residential spaces raises according to daily life experience and daily rhythm to get environments that sustain space feeling and continuity of residential units with the humanity of today, the research hypotheses addressed as:Hidden rhythm of daily life reinforces human being with his environment through sustaining interactive spaces. The research suspected two types of rhythms: the first is Isorythmic Eurhmia rhythms that sustain interactive spaces; the second is Arrhythmia rhythms that lead to repellant unlivable spaces. The research finds traditional modes of sheltering corresponded with nature’s rhythms at the same time, evoked rich patterns of social rhythms with healthy interactive spaces reaching to Isorythmic Eurhmia rhythms by harmonious synchronization of different rhythms interact with the environment, dilvers locality, identity and social interaction. While modern houses fail to accommodate changing needs producing arrhythmia rhythms with isolation and disinterest behaviors contradicting with nature's rhythm, have spatial control that achieves universality and restrict relationship between time space and human activities inside the space.
Effect of Temperature and Sisal Fiber Content on the Properties of Plaster of Paris
Authors: M. ALmusawi Aqil , S. Hussein Thulfiqar , A. Shallal Muhaned 
Published: April 2019

Recent developments in the production of ecologically friendly building composites have led to a renewed interest in the use of vegetable fibers as a reinforcement element. Traditional pure Plaster of Paris (POP) can suffer from the development of micro-cracks due to thermal expansion. Therefore, sisal fiber was studied for its potential as an ecological element to restrict and delay the development of micro-cracks in POP. Different sisal proportions of 0, 2, 4, 6, 8 and 10 wt. % of POP were used to characterize the physical and mechanical properties of POP at the ambient temperature. Then, the effects of temperatures of 25, 100, 200, 300, 400 and 500 Â were investigated. Results proved that the composite of 10% sisal fiber had the best mechanical properties. Also, when the fiber content was increased, the compositeâ€™s performance was enhanced, becoming better able to resist elevated temperatures. However, raising the temperature to 300 or above had a negative effect on the mechanical properties, which were significantly decreased due to the degradation of the sisal fiber.Â
MPPT Design for Photo Voltaic Energy System Using Backstepping Control with a Neural Compensator
Authors: Sriharibabu A. , Rao G. Srinivasa 
Published: April 2019

It is very important to have maximum power point trackers for photo voltaic systems to improve their efficiency. This paper deals with the converter based maximum power point tracking by robust backstepping controller along with the neural network. The neural network provides the output reference PV voltage to the backstepping controller. Back propagation neural network is used for a standalone photovoltaic system under robust environmental conditions. Unlike Conventional solar-array mathematical model, neural network does not require any physical data for modeling since it has the superior potential to derive non-linear models without requiring the physical data of the models. In this paper the maximum power point of photovoltaic module is predicted with the simulation trained back-propagation neural network using a random set of data collected from a real photovoltaic array. The neural network based PV system with backstepping controller is modeled in MATLAB/Simulink. At different atmospheric conditions the developed model is simulated. The simulation results of PV system depict that with the proposed converter based controller, the maximum power is tracked accurately and successfully.
Study on the Coal-Water Fuel Pipeline Transportation Taking Into Account the Granulometric Composition Parameters
Authors: Chernetskaya-Beletskaya N , Rogovyi A , Shvornikova A , Baranov I , Miroshnikova M , Bragin N 
Published: April 2019

The highly loaded coal-water fuel pipe flow was verified. The move of the coal-water fuel with the 60% of coal loading practically has not been studied, especially for the coal originated from Ukraine. Through experimental research it was discovered that the water-coal fuel of such concentrations has a Bingham rheological characteristic. The verification was carried out by comparing the results of numerical calculations and experimental research. As a result of the numerical calculations of the flow, near the axis of the tube, a zone of approximately the same velocity is obtained, which qualitatively coincides with the results of experimental studies and with the results of the analytical description of the Bingham flow. As a result of the calculation the pressure drop value was defined, costs and velocity distribution over the cross section of the pipeline in the straight line and in curve. The velocity distribution profiles of the water-coal fuel flow are built. To compare the results of the calculation and to validate the rheological model choice velocity calculations were performed using the proposed model of Bingham and Newtonian fluids at the same effective viscosity values.Â Â
The Influence of Inorganic Fillers on the Protective Properties of Epoxy Polymer Composite Materials
Authors: Danchenko Yuliya , Andronov Vladimir , Obizhenko Tatyana , Kosse Anatoliy , Khmyrov Igor 
Published: April 2019

The influence of regularities of the chemical-mineralogical nature, the dispersity, and the surface properties of inorganic fillers on the protective properties of epoxy polymer composite materials have been investigated. Polymeric compositions based on epoxy resin of ED-20 brand and aliphatic amine curing agent of diethylenetriamine of DETA brand have been chosen as the research materials. The fillers were the air-dry dispersed materials of different nature: oxide, clay and quartz. The resistance of the composites to water and aqueous solutions (absorbency) was investigated by dipping the samples into an aggressive aqueous medium. For the received samples of the filled composites, thermogravimetric (TG) and differential scanning calorimetry (DSC) method were used using the SDT Q600 device manufactured by TA Instruments (USA). It has been found that the thermal stability and the absorbing capacity of the filled composites in water and aqueous acidic and alkaline mediums correlate with each other. It has been shown that to obtain materials with improved protective characteristics, it is necessary to use oxide or clay fillers with the basic (alkaline) surface function.Â Â
Mathematical Models for Determination of Specific Energy Need for Heating and Cooling of the Administrative Building
Authors: I. Deshko V , Yu. Bilous I 
Published: April 2019

According to the building energy balance, most of the resources are spent on maintaining a comfortable indoor microclimate. To estimate the energy resources rational use and to determine building energy efficiency, specific indicators are used per unit area and/or volume.In this paper, a comparative analysis of various approaches to determination of energy need for heating and cooling that have been used or are introduced in Ukraine and the peculiarities of different climatic data application is carried out. The differences in application of considered methods are established. The analysis of various averaging time intervals (monthly, daily average and hourly) for climatic parameters change in dynamic models during the heating period application influence on heating and cooling load change is carried out. Specific energy need has been established according to different methods and a comparison with the current normative values in Ukraine has been made.Â Â