دانلود فایل به زبان انگلیسی SOLID MECHANICS AND ITS APPLICATIONS /Elasticity صفحه431

The subject of Elasticity can be approached from several points of view, depending on whether the practitioner is principally interested in the mathematical structure of the subject or in its use in engineering applications and in the latter case, whether essentially numerical or analytical methods are envisaged as the solution method. My first introduction to the subject was in response to a need for information about a specific problem in Tribology. As a practising Engineer with a background only in elementary Strength of Materials, I approached that problem initially using the con- cepts of concentrated forces and superposition. Today, with a rather more extensive knowledge of analytical techniques in Elasticity, I still find it helpful to go back to these roots in the elementary theory and think through a problem physically as well as mathematically, whenever some new and unexpected feature presents difficulties in research. This way of thinking will be found to permeate this book. My engineering background will also reveal itself in a tendency to work examples through to final expressions for stresses and displacements, rather than leave the derivation at a point where the remaining manipulations would be routine. With the practical engineering reader in mind, I have endeavoured to keep to a minimum any dependence on previous knowledge of Solid Mechanics, Continuum Mechanics or Mathematics. Most of the text should be readily intelligible to a reader with an undergraduate background of one or two courses in elementary Strength of Materials and a rudimentary knowledge of partial differentiation. Cartesian tensor notation and the summation convention are used in a few places to shorten the deriva- tion of some general results, but these sections are carefully explained, so as to be self-explanatory.

دانلود پایان نامه انگلیسی: CLOUD COMPUTING’S EFFECT ON ENTERPRISES

LUND UNIVERSITY
Informatics
“CLOUD COMPUTING’S EFFECT ON ENTERPRISES”
“…in terms of Cost and Security”
Master Thesis submitted January, 2011
Size: 89 Pages
Supervisor: Odd Steen.
Examiners: Björn Johansson, Paul Pierce.

Abstract
Innovations are necessary to ride the inevitable tide of change. Most of enterprises are striving to reduce their computing cost through the means of virtualization. This demand of reducing the computing cost has led to the innovation of Cloud Computing. Cloud Computing offers better computing through improved utilization and reduced administration and infrastructure costs. Cloud Computing is the sum of Software as a Service (SaaS) and Utility Computing.
Cloud Computing is still at its infant stage and a very new technology for the enterprises. Therefore, most of the enterprises are not very confident to adopt it. This research paper tackles this issue for enterprises in terms of cost and security. In this paper I discuss the benefits and drawbacks an enterprise can have while they adopt Cloud Computing in terms of Cost and Security.
In the end, concluding that Cloud Computing is better for medium and small sized enterprises as compared to large enterprises in terms of both cost and data security. 

TABLE OF CONTENTS
1. INTRODUCTION AND BACKGROUND ............................................................................................ 4
1.1 RESEARCH QUESTION.................................................................................................................... 6
1.2 PURPOSE OF RESEARCH ................................................................................................................ 6
1.3 RESEARCH DELIMITATION........................................................................................................... 6
2. THEORATICAL BASELINES............................................................................................................... 8
2.1 CLOUD COMPUTING ....................................................................................................................... 8
2.1.1 DEFINITION ............................................................................................................................... 8
2.1.2 CLOUD COMPUTING ARCHITECTURE.................................................................................. 9
2.1.3 CLOUD COMPUTING EVOLUTION....................................................................................... 11
2.1.4. CLOUD COMPUTING ADOPTION........................................................................................ 14
2.2 CLOUD COMPUTING AND COST................................................................................................. 15
2.2.1 COST IN CONSUMER PERSPECTIVE .................................................................................... 16
2.2.2 COST IN PROVIDER’S PERSPECTIVE................................................................................... 17
2.2.3 CLOUD COMPUTING’S COST EFFECT ................................................................................ 18
2.2.3.1 BENEFITS ......................................................................................................................... 18
2.2.3.2 DRAWBACKS .................................................................................................................. 20
2.2.4 CLOUD COMPUTING VERSUS DESKTOP GRID.................................................................. 20
2.3 CLOUD COMPUTING AND DATA SECURITY............................................................................ 21
2.3.1 DATA SECURITY IN CLOUD................................................................................................... 22
2.3.2 SECURITY BENEFITS OF CLOUD COMPUTING.................................................................. 27
2.4 SUMMARY...................................................................................................................................... 34
3. RESEARCH STRATEGY..................................................................................................................... 37
3.1METHOD SELECTION.................................................................................................................... 37
3.2 DATA ANALYSIS........................................................................................................................... 41
3.3 RESEARCH QUALITY.................................................................................................................... 44
4. EMPIRICAL STUDY ............................................................................................................................ 46
4.1 INTERVIEWS.................................................................................................................................. 46
4.1.1 CLOUD COMPUTING AND COST .......................................................................................... 46
4.1.2 CLOUD COMPUTING AND DATA SECURITY....................................................................... 49
4.1.3 CLOUD COMPUTING AND PROVIDER’S PERSPECTIVE ................................................... 52
4.2 INTERVIEWS DISCUSSION........................................................................................................... 56
4.2.1 THE COST EFFECT.................................................................................................................. 59
4.2.2 THE SECURITY EFFECT ......................................................................................................... 62
5. CONCLUSION...................................................................................................................................... 69
APPENDIX A: INTERVIEW 1................................................................................................................. 71
APPENDIX B: INTERVIEW 2................................................................................................................. 76
APPENDIX C: INTERVIEW 3................................................................................................................. 80
REFERENCES .......................................................................................................................................... 86