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In metalworking, rolling is a metal forming process in which metal stock is passed through a pair of rolls. Rolling is classified according to the temperature of the metal rolled. If the temperature of the metal is above its recrystallization temperature, then the process is termed as hot rolling. If the temperature of the metal is below its recrystallization temperature, the process is termed as cold rolling. In terms of usage, hot rolling processes more tonnage than any other manufacturing process, and cold rolling processes the most tonnage out of all cold working processes. This article describes the use of advanced tubing inspection NDT methods for boiler and heat exchanger equipment in the petrochemical industry to supplement major turnaround inspections. The methods presented include remote field eddy current, magnetic flux leakage, internal rotary inspection system and eddy current.

In this paper we derive new formulas for the number of spanning trees, of some product graphs such as cartesian product, tensor product, composition product, normal product, and strong sum using linear algebra, Chebyshev polynomials and matrix theory techniques.

An algorithm for computing a discrete generalized Hankel-Clifford transform is presented in this paper. In the solution of certain types of differential equations this algorithm can provide a major improvement in speed and accuracy over previously described methods. An application to a particular form of the transport equation relevant to a class of problems in electron scattering is given.

The present research intends to study any relation between organizational culture and suggestions system. It is an explanatory one from among different types of applicable researches and from method viewpoint. Therefore two separated questionnaires were applied for this purpose. The first one is related to organizational culture with 23 closed questions. The second one is related to measuring any cooperation through suggestions system. Upon ensuring about narration and survival of measuring tools, both questionnaires were distributed among members of a sample consisting of 30 persons of a statistical population including headquarter personnel of quarter areas of Education Department. According to the findings, there is a meaningful relation between organizational culture parameters and suggestions system. Finally there are some proposals for betterment and upgrading all cultural dimensions in order to have more promotion of suggestions system in mentioned organization.

The problem with AES, most extensively used encryption, is that it uses many multivariate equations which are linear in nature . Thus it can be broken using algebraic cryptanalysis. This provides a serious threat as AES was considered to be unbreakable and thus it was used in many encryption systems. The DES predecessor of AES has problem of multivariate linear equation and speed. By exploiting the key steps and vulnerabilities in these algorithms it is possible to break through AES and DES secured data.

We are very happy to announce that from 29th December 2011, Dr. J. Thomas Joseph Prakash has joined the team of Elixir Editorial Advisory Board. He will carry a special responsibility for dealing with manuscripts based on Crystal growth and Thin films. J. Thomas Joseph Prakash is currently working at Department of Physics, H. H. The. Rajah's College (Autonomous), Pudukkottai - 622 001, Tamilnadu, India. The appointment of J. Thomas Joseph Prakash as member Editorial Advisory Board strengthens the links and will make it easier for prospective authors to establish contact with the journal. Please send any expressions of interest to chiefeditor@elixirjournal.org. Sincerely Editor-in-Chief

We are very happy to announce that from 22nd April 2013, Dr. Khaled Nabih Zaki Rashed has joined the team of Elixir Editorial Advisory Board. He will carry a special responsibility for dealing with manuscripts based on Natural Products Chemistry and Advanced Spectroscopic Techniques for Organic Structures Identification. Dr. Khaled Nabih Zaki Rashed is currently working as National Research Centre (NRC), Pharmacognosy Department, Pharmaceutical and Drug Industries Research Division, Dokki, Giza, Egypt. The appointment of Dr. Khaled Nabih Zaki Rashed as member Editorial Advisory Board strengthens the links and will make it easier for prospective authors to establish contact with the journal. Please send any expressions of interest to elixirpublishers@gmail.com. Sincerely Editor-in-Chief

We are very happy to announce that from 28th February 2012, Dr. Md Azree b. Othuman Mydin has joined the team of Elixir Editorial Advisory Board. He will carry a special responsibility for dealing with manuscripts based on Building and Planning. Dr. Md Azree b. Othuman Mydin is currently working at School of Housing, Building and Planning, Universiti Sains Malaysia, 11800 Penang. The appointment of Dr. Md Azree b. Othuman Mydin as member Editorial Advisory Board strengthens the links and will make it easier for prospective authors to establish contact with the journal. Please send any expressions of interest to chiefeditor@elixirjournal.org. Sincerely Editor-in-Chief

We are very happy to announce that from 30th October 2013, Dr. Tarun Chopra has joined the team of Elixir Editorial Advisory Board. He will carry a special responsibility for dealing with manuscripts based on Electrical Engineering. Dr. Tarun Chopra is currently working as Associate Professor & H.O.D, Department of Electrical Engineering, Govt. Engineering College Bikaner. The appointment of Dr. Tarun Chopra as member Editorial Advisory Board strengthens the links and will make it easier for prospective authors to establish contact with the journal. Please send any expressions of interest to elixirpublishers@gmail.com.

We are very happy to announce that from 22nd November 2013, Dr. V. Subedha has joined the team of Elixir Editorial Advisory Board. She will carry a special responsibility for dealing with manuscripts based on Neural Networks and Computer Networks & Security. Dr. V. Subedha is currently working as HOD & Professor, Department of Computer Science and Engineering, Panimalar Institute of Technology, Chennai. The appointment of Dr. V. Subedha as member Editorial Advisory Board strengthens the links and will make it easier for prospective authors to establish contact with the journal. Please send any expressions of interest to elixirpublishers@gmail.com. Sincerely Editor-in-Chief