Suchergebnisse

Cyberattacks are increasing in both number and severity for private, corporate, and governmental bodies. To prevent these attacks, many intrusion detection systems and intrusion prevention systems provide computer security by monitoring network packets and auditing system records. However, most of these systems only monitor network packets rather than the computer itself, so physical intrusion is also an important security issue. Furthermore, with the rapid progress of the Internet of Things (IoT) technology, security problems of IoT devices are also increasing. Many IoT devices can be disassembled for decompilation, resulting in the theft of sensitive data. To prevent this, physical intrusion detection systems of the IoT should be considered. We here propose a physical security system that can protect data from unauthorized access when the computer chassis is opened or tampered with. Sensor switches monitor the chassis status at all times and upload event logs to a cloud server for remote monitoring. If the system finds that the computer has an abnormal condition, it takes protective measures and notifies the administrator. This system can be extended to IoT devices to protect their data from theft.

Cover -- Title Page -- Copyright Page -- Foreword -- Preface -- Acknowledgements -- Table of Contents -- List of Contributors -- Part 1: Methodologies for the Study and Utilization of Sand Dunes -- 1. A Synoptic View of Northern Hemisphere Deserts and Sand Dunes: Perceptions, Misconceptions and Distinctions -- 2. Advances in Measurement Techniques for Estimating Sand Dune Movements -- 3. A Review of the Development in the Remote Sensing of Sand Dunes -- 4. Applications of ICESat-2 Laser Altimeter Data for Sand Dunes: Morphology and Dynamics Studies -- 5. New Perspectives on the Occurrence and Characteristics of the Coastal Sand Dunes, North of Nile Delta, Egypt -- 6. Algerian Sahara Sand Dune (Western Erg) Characterization: An Experimental Study -- 7. Economic Heavy Minerals in the Coastal Area Between Burg EL-Burullus and Baltim, North of Nile Delta, Egypt -- Part 2: Dune Landscapes of China-Origins and Evolution -- 8. Formation of Dune Field Landscape in North and North-West China during Plio-Pleistocene Transition (4-2 Ma) and the Long-term Evolution -- 9. Formation, Evolution and Forcing Mechanism of Feathered Sand Dunes in the Kumtag Desert, China -- 10. Mega-Dune-Lake System in the Badain Jaran Sand Sea -- 11. Morphology, Distribution and Formation of the Nebkhas on Gobi and Desert in China -- 12. Type, Distribution, Formation and Evolution of Coastal Aeolian Dunes -- 13. High-Altitude Aeolian Desertification and Sand Dunes on the Tibetan Plateau, China -- 14. Characteristics, Dynamics, and Provenance of Sand Dunes in the Hexi Corridor, China -- Part 3: Morphology and Distribution of Dune Landscapes on the Indian Subcontinent -- 15. Dune Accumulation Chronologies from the Thar Desert, India: A Review.

"This book in two Volumes and with a FOREWORD by the renowned Professor M.A.J. Williams draws on evidence from coastal and inland regions, including desert dunes, wind-blown dust, river and lake sediments, glacial moraines, plant and animal fossils, isotope geochemistry, soils and prehistoric archaeology to better understand the genesis and development of dunes systems in selected northern hemisphere sand dunes from Asia, Africa and the Middle East regions. The collection of research papers and case studies that are presented in this book provide the reader with a wealth of information about the distribution and types of sand dunes and an insight into the complexity of sand dune formation, migration and management. Research in many countries across the northern hemisphere on Dunes, whether coastal or inland are under pressure around the world. Much of the pressure comes from human activities, and the anthropogenic disturbance, when coupled with global warming and alterations to the amount, frequency and temporal distribution of precipitation could lead to more serious management challenges in the future. There is much that we still need to find out about the origin, genesis and development of sand dunes so that they can be managed better. The difficult and complex questions being repeatedly raised can be answered only by interdisciplinary endeavours. Geomorphologists, geologists, palaeontologists, climatologists, ecologists, and others, can work together on research projects that better define the origin, evolution and development of dunes, both inland and along the coasts"--

Fritillaria hupehensis (Hubeibeimu) widely grows in the mid-western zones of China. In the present work, we investigated the physicochemical compositions, antioxidant abilities, and thermal properties of the bulbs of F. hupehensis dehydrated by heat-pump drying (HD), vacuum drying (VD), natural drying (ND), freeze drying (FD), and microwave drying (MD). Total contents of nucleosides and nucleobases in F. hupehensis flours ranged from 727.64 to 1,654.25 μg/g, and total free amino acids ranged from 88.03 to 128.21 mg/g. FD flour had high contents of total nucleosides and nucleobases, and free amino acids. MD flour had low contents of total starch, amylose, protein, nucleosides and nucleobases, and VB1 and VB2, and high levels of total phenolic content (TPC) and antioxidant abilities. Furthermore, MD flour facilitated gelatinisation, while FD flour displayed opposite trend. HD flour had high total starch content, while ND flour weakened the bitter taste due to the percentage of sweet and bitter taste of amino acids.