Academic Research Publishing Agency Press
International Journal of Research and Reviews in Applied Sciences
ISSN: 2076-734X, EISSN: 2076-7366

Volume 4, Issue 2 (August, 2010)

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1. ON THE ALGEBRAIC CONNECTION OF NONLINEAR EVOLUTION EQUATIONS AND THE ABEL EQUATION EXEMPLIFIED BY THE BURGERS EQUATION
by Alfred Huber
Abstract

Based on the idea of the special function transform method we associate a connection between solutions of nonlinear evolution equations of higher-order and a predestinated nonlinear ordinary differential equation. Here, in this connection we use the Abel Equation for the first time. The solution manifold of Abel’s equation stated in a most general form allows one to determine unknown analytical classes of solutions of any evolution equations.

By considering the Burgers Equation acting a test example new rational-type of solutions result. Nevertheless it should be emphasised that the solution procedure of complicate nonlinear ordinary differential equations as in the case of similarity reduction techniques is obviated. The unknown solution function of the nonlinear partial differential equation under consideration is assumed to be comprised in additional form as both a linear and a reciprocal part. This auxiliary function is also a solution of Abel’s Equation.


2. EXISTENCE OF ANTIPERIODIC SOLUTIONS OF JOSEPHSON’S IMPULSIVE EQUATION WITH HENSTOCK-KURZWEIL INTEGRABLE FORCING

by J-M. Belley & P. Morales

Abstract

Under weak conditions, Josephson's state dependent impulsive equation with Henstock-Kurzweil integrable forcing is shown to admit an absolutley continuous antiperiodic generalized solution with Lebesgue integrable first derivative and Hanstock-Kurzweil integrable second derivative.  A uniqueness condition is also given.


3. MULTISTAGE HOMOTOPY ANALYSIS METHOD FOR SOLVING NON-LINEAR RICCATI DIFFERENTIAL EQUATIONS
by Hossein Jafari & M.A. Firoozjaee
Abstract In this paper, A modi£cation of the Homotopy analysis method (HAM) applied to nonlinear Riccati differential equations which yields a series solution with accelerated convergence, has been presented. Illustrative examples have been given.

4. NEW REFERENCE SOLUTIONS AND PARAMETRIC STUDY FOR MULTILAYERED CYLINDRICAL SHELL
by F. Dau, F. Pablo & O. Polit
Abstract

This work deals with the performances of a refined shell model for modelizing cylindrical multilayered deep or shallow, thin or thick shells. To this end, new 3D analytical solutions are built from the well known Ren cylindrical shell panel and stand for reference solutions. Next, a parametric study varying the shell geometry (radius of curvature, thickness, curve side length of the panel) and the number of layers is carried out numerically using a C1 finite element based on the present shell model. Numerical results are then compared to the new set of reference solutions established for laminates of 1, 2, 3 and 5 layers. Finally, use restrictions according to the shell geometry can be done. Moreover, indications about shell curvature can be obtained considering the ratio between radius and curve length.


5. A CFD COMPARISON OF HEAT TRANSFER AND PRESSURE DROP ACROSS INLINE ARRANGEMENT SERRATED FINNED TUBE HEAT EXCHANGERS WITH AN INCREASING NUMBER OF ROWS
by S.R. Mcilwain
Abstract

A number of rows of inline configuration serrated fin heat exchanger were modeled using CFD to examine a number of characteristics previously explored in the special single row case.  The development of heat transfer in the bundle is discussed, paying particular attention to the special effects generated by the serrations and their influence on the heat transfer over the full fin surface. A comparison between a commercial pressure drop prediction method and the CFD results is then presented and a discussion of the difference in results given. A direction for a pressure drop prediction method for serrated finned tube bundles is also outlined from the results.


6. DESIGN OF THE H- CONTROLLER FOR VSI FED PMSM DRIVE
by Pilla Ramana, K. Alice Mary & M. Surya Kalavathi
Abstract

This paper presents a design method of H- ∞ controller for a permanent magnet motor drive included in the current loop in addition to the PI controller included in the speed loop for improving the system dynamics. A simulation has been performed using MATLAB software and the performance figures for dierent cases with and without H-∞ controller are obtained. From the results it is clear that performance of the system have increased for the dierent cases. The software realization for the Design of H -∞ controller for a nonlinear motor drive is performed and as an extension to this a hardware implementation may be expected.


7. A NOVEL APPROACH FOR OPTIMIZED DISPERSION IN OPTICAL FIBER COMMUNICATION
by M.V. Raghavendra & P.L.H. Vara Prasad
Abstract

A light signal propagating in an optical fiber is subject to a variety of ways in which it can get distorted. Many of these are based on dierent propagation velocities for dierent parts of the signal, resulting in dispersion. After such distortion, there is a risk that the signal arrives at the receiver in such a mangled form that it may be impossible to correctly decipher it. In this paper a novel approach for optimized dispersion using different refractive index profiles have been clearly described.


8. PROPOSED DATA HIDING TECHNIQUE TEXT IMAGE INSIDE IMAGE (TIII)
by Hebah H.O. Nasereddin & Murad Saleh Al Farzaeai
Abstract

Information hiding techniques have recently become important in a number of application areas, there are many techniques to achieve hiding data, and hiding text inside image is one field of them. The paper gives short example of these techniques and proposes a new technique to hide text inside digital image by the concept of the visual representation of the text within image.


9. WITNESS BASED AND VOTING BASED DATA FUSION ASSURANCE MECHANISM IN SENSOR NETWORKS
by M.Umashankar & C.Chandrasekar
Abstract

Security is a very important issue when designing or deploying any network or protocol. The nature of large, ad-hoc, wireless sensor networks presents significant challenges in designing security schemes. One or several sensors then collect the detection results from other sensors. The collected data must be processed by the sensor to reduce the transmission burden before they are transmitted to the base station. This process is called data fusion. Data fusion Nodes will fuses the collected data from nearby sensor nodes before they are sent to the base station. If a fusion node is compromised, then the base station cannot ensure the correctness of the fusion data sent to it. Various methods are proposed, that deal with providing an assured data transfer to the Base Station A Witness based approach the base station receives the data and votes form the randomly selected sensor node. The vote comes from other sensor nodes called witness, to verify the correctness of the fusion data.  The base station to collect the vote through the selected node , if the selected node is compromised it could forge the vote. the witness node must encrypt the vote to prevent this forgery. Compared with the vote, the encryption requires more bits, increasing transmission burden from the chosen node to the base station. The chosen node consumes more power .the witness-based approach using direct voting mechanism  scheme has better performance in terms of assurance, overhead, and delay. The witness node transmits the vote directly to the base station.


10. AN AUTOMATED DATA THROUGHPUT MEASUREMENT OVER A 10/100MBPS LAN
by John B. Oladosu & Abigail B. Adetunji
Abstract

There are many factors that affect data throughput among which is the operating system. Other factors include cable technology used, network adapter, speed and scalability of hub or switch used. Data throughput from a network user’s perspective is solely dependent on the network hardware. In this work, it could be seen that the network operating system running on a network and the file system of the network operating system have a lot to do with data throughput. A consideration is made of data throughput for common Microsoft operating systems used in network environments. The reason for this is not far fetched; Microsoft operating systems are used in more than 90% of small to medium networked systems all over the world. Most users do not have rationale for using a particular OS. At best they use an OS because it is the latest version. This may not necessarily be a good way of choosing. The results obtained in this work is a prove of this fact.


11. DEVELOPMENT OF A WORKFLOW APPLICATION FOR VEHICLE FLEET MANAGEMENT: A CASE STUDY OF GUINNESS NIGERIA PLC
by John B. Oladosu, Oludare Opaleye & Olusayo D. Fenwa
Abstract

Transfer of documents and information in various establishments are usually characterized with various problems such as loss of documents, delay of documents   delivery   and   some   bureaucratic   problems that are non-productive to the establishment. Overcoming   these   problems   calls   for   an   automated software  known  as  workflow  application software  that promises   reliability,   timeliness   and   precision   in   the treatment  of  documents  in  any  establishment. In this work, a  workflow engine for acquisition and management  of  vehicle  fleet  of  Guinness  Nigeria  PLC was  design  to  overcome  the  bottleneck  associated  with this  process.  The workflow engine is C# based with ASP.NET.   C#   is   the   host   application   which   is   time efficient and web enabling. The workflow  engine design is  capable  of  handling  car  requisition  and  allocation  to various cadres of employee in the establishment through document  transfer.  The advantage of this work is in its reliability,    efficiency and flexibility of document management. We also propose this work as open source workflow application with customization    to any organization needing it.


12. ARTIFICIAL GROUND WATER RECHARGE WITH A SPECIAL REFERENCE TO INDIA
by Amartya Kumar Bhattacharya
Abstract

Artificial groundwater recharge is a process by which the groundwater reservoir is augmented at a rate exceeding the augmentation rate under natural conditions of replenishment. In some parts of India, due to over-exploitation of groundwater, decline in groundwater levels resulting in shortage of supply of water, and intrusion of saline water in coastal areas have been observed. In such areas, there is need for artificial recharge of groundwater by augmenting the natural infiltration of precipitation or surface-water into underground formations by methods such as water spreading, recharge through pits, shafts, wells et cetera The choice of a particular method is governed by local topographical, geological and soil conditions; the quantity and quality of water available for recharge; and the technological-economical viability and social acceptability of such schemes. This paper discusses various issues involved in the artificial recharge of groundwater.














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