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Introduction to Databases
Introduced forty years ago, relational databases proved unusually succe- ful and durable. However, relational database systems were not designed for modern applications and computers. As a result, specialized database systems now proliferate trying to capture various pieces of the database market. Database research is pulled into di?erent directions, and speci- ized database conferences are created. Yet the current chaos in databases is likely only temporary because every technology, including databases, becomes standardized over time. The history of databases shows periods of chaos followed by periods of dominant technologies. For example, in the early days of computing, users stored their ...
Introduction to Constraint Databases
Differing from other books on the subject, this one uses the framework of constraint databases to provide a natural and powerful generalization of relational databases. An important theme running through the text is showing how relational databases can smoothly develop into constraint databases, without sacrificing any of the benefits of relational databases whilst gaining new advantages. Peter Revesz begins by discussing data models and how queries may be addressed to them. From here, he develops the theory of relational and constraint databases, including Datalog and the relational calculus, concluding with three sample constraint database systems -- DISCO, DINGO, and RATHER. Advanced undergraduates and graduates in computer science will find this a clear introduction to the subject, while professionals and researchers will appreciate this novel perspective on their subject.
Environmental Nexus for Resource Management
This book gives detailed information about how soil, water and wastes can be managed to overcome the various global issues via possible nexus thinking. The emphasis is on the environmental resource perspective of global climate change-related issues. It provides stepwise information on climate change and adaption strategies, urbanization and its impact and management strategies, environmental nexus approaches to cope with global challenges and recourses conservation and ecological approaches to restore the damaged ecosystem. Features: Compiles the possible nexus approaches that contribute to managing the atmospheric environmental variables in sustainable ways Focuses on environmental resources perspective of the global change Covers how soil, water and waste may be managed in a nexus Explains modern strategies to manage the present environmental situation that are feasible and safe to the environment Discusses environmental nexus for judicious resource management This book is aimed at researchers and graduate students in environmental sciences and engineering and sustainable development.
Deserts and Desertification
A desert is an ecosystem in an arid zone in which sand dunes cover the land and sandstorms often occur. Although desert vegetation is sparse, it plays an important role in ecosystem structure and function. Desertification is one of the most severe environmental problems today. Land desertification can be controlled through many measures, such as eco-villages, eco-agriculture, biodiversity conservation, and the combination of engineering and biology. This edited volume provides new insights into the pattern of desert ecosystems and the progress of desertification control. It is a useful resource for researchers in ecology, forestry, and land desertification control.
结构化学
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