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This book describes a new model, Relation Based Access Control (RelBAC) to handle the dynamics with full features of a general sense access control system. It is organized as follows: Chapter 2 analyzes the new challenges of the Web 2.0 such as the great dynamics in subjects, objects and in permissions. Chapter 3 lists existing access control models as the state of the art. Chapter 4 describes the RelBAC model and logic. We show the reasoning power of RelBAC in chapter 5. In Chapter 6, the extendibility of RelBAC is studied. Chapters 7 and 8 show applications of two important techniques of Sem
Computers --- Electronic information resources --- Data encryption (Computer science) --- Computer security. --- Computer privacy --- Computer system security --- Computer systems --- Cyber security --- Cybersecurity --- Electronic digital computers --- Protection of computer systems --- Security of computer systems --- Data protection --- Security systems --- Hacking --- Data encoding (Computer science) --- Encryption of data (Computer science) --- Computer security --- Cryptography --- Access control. --- Protection --- Security measures
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Motion picture producers and directors --- Motion pictures --- Feng, Xiaogang --- Criticism and interpretation.
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Beginning first as a case study of Feng Xiaogang, this book explores Chinese film history since the early 1990s in terms of changes of the Communist Party's film policy, industry reforms, the official promotion of Main Melody films and the emergence and growth of popular cinema. The image of Feng that emerges in this book is of a filmmaker working under political and economic pressures in a post-socialist state while still striving to create works with a personal socio-political agenda. In keeping with this reality, this book approaches Feng as a special kind of film auteur whose works must be
Motion pictures --- Motion picture producers and directors --- Feng, Xiaogang --- Criticism and interpretation.
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In this volume, Prof. Zhang reviews the systematic theoretical studies in his group on the growth mechanisms and properties of silicon quantum dots, nanotubes and nanowires, including: mechanisms of oxide-assisted growth of silicon nanowires, energetic stability of pristine silicon nanowires and nanotubes, thermal stability of hydrogen terminated silicon nanostructures, size-dependent oxidation of hydrogen terminated silicon nanostructures, excited-state relaxation of hydrogen terminated silicon nanodots, and direct-indirect energy band transitions of silicon nanowires and sheets by surface engineering and straining. He also discusses the potential applications of these findings. This book will mainly benefit those members of the scientific and research community working in nanoscience, surface science, nanomaterials and related fields.
Chemistry. --- Nanotechnology. --- Surfaces (Physics) --- Molecular technology --- Nanoscale technology --- Chemistry, Physical and theoretical. --- Nanoscale science. --- Nanoscience. --- Nanostructures. --- Materials science. --- Theoretical and Computational Chemistry. --- Nanoscale Science and Technology. --- Characterization and Evaluation of Materials. --- High technology --- Physical sciences --- Physics --- Surface chemistry --- Surfaces (Technology) --- Surfaces (Physics). --- Material science --- Nanoscience --- Nano science --- Nanoscale science --- Nanosciences --- Science --- Chemistry, Theoretical --- Physical chemistry --- Theoretical chemistry --- Chemistry --- Materials --- Theoretical Chemistry. --- Nanophysics. --- Characterization and Analytical Technique. --- Analysis. --- Nanostructured materials. --- Silicon --- Quantum theory. --- Industrial applications.
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In this volume, Prof. Zhang reviews the systematic theoretical studies in his group on the growth mechanisms and properties of silicon quantum dots, nanotubes and nanowires, including: mechanisms of oxide-assisted growth of silicon nanowires, energetic stability of pristine silicon nanowires and nanotubes, thermal stability of hydrogen terminated silicon nanostructures, size-dependent oxidation of hydrogen terminated silicon nanostructures, excited-state relaxation of hydrogen terminated silicon nanodots, and direct-indirect energy band transitions of silicon nanowires and sheets by surface engineering and straining. He also discusses the potential applications of these findings. This book will mainly benefit those members of the scientific and research community working in nanoscience, surface science, nanomaterials and related fields.
Physics --- Surface chemistry --- Chemistry --- Materials sciences --- Electrical engineering --- Applied physical engineering --- Computer. Automation --- materiaalkennis --- oppervlakte-onderzoek --- nanotechniek --- chemie --- informatica
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In this Brief, authors introduce the advance in theoretical and experimental techniques for determining the thermal conductivity in nanomaterials, and focus on review of their recent theoretical studies on the thermal properties of silicon–based nanomaterials, such as zero–dimensional silicon nanoclusters, one–dimensional silicon nanowires, and graphenelike two–dimensional silicene. The specific subject matters covered include: size effect of thermal stability and phonon thermal transport in spherical silicon nanoclusters, surface effects of phonon thermal transport in silicon nanowires, and defects effects of phonon thermal transport in silicene. The results obtained are supplemented by numerical calculations, presented as tables and figures. The potential applications of these findings in nanoelectrics and thermoelectric energy conversion are also discussed. In this regard, this Brief represents an authoritative, systematic, and detailed description of the current status of phonon thermal transport in silicon–based nanomaterials. This Brief should be a highly valuable reference for young scientists and postgraduate students active in the fields of nanoscale thermal transport and silicon-based nanomaterials.
Solid state physics --- Physics --- Materials sciences --- Electronics --- Electrical engineering --- Artificial intelligence. Robotics. Simulation. Graphics --- vaste stof --- materiaalkennis --- materie (fysica) --- nanotechniek --- hernieuwbare energie --- energie (technologie) --- simulaties --- fysica --- omzetters elektrische energie --- Solid state physics. --- Nanoscale science. --- Nanoscience. --- Nanostructures. --- Nanotechnology. --- Physics. --- Materials science. --- Force and energy. --- Solid State Physics. --- Nanoscale Science and Technology. --- Numerical and Computational Physics, Simulation. --- Energy Materials. --- Conservation of energy --- Correlation of forces --- Energy --- Dynamics --- Material science --- Physical sciences --- Natural philosophy --- Philosophy, Natural --- Molecular technology --- Nanoscale technology --- High technology --- Nanoscience --- Nano science --- Nanoscale science --- Nanosciences --- Science --- Solids
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