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Gravitation as a Plastic Distortion of the Lorentz Vacuum
Addressing graduate students and researchers in theoretical physics and mathematics, this book presents a new formulation of the theory of gravity. In the new approach the gravitational field has the same ontology as the electromagnetic, strong, and weak fields. In other words it is a physical field living in Minkowski spacetime. Some necessary new mathematical concepts are introduced and carefully explained. Then they are used to describe the deformation of geometries, the key to describing the gravitational field as a plastic deformation of the Lorentz vacuum. It emerges after further analysis that the theory provides trustworthy energy-momentum and angular momentum conservation laws, a feature that is normally lacking in General Relativity.
Mathematical Reviews
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O teletrabalho e suas atuais modalidades
Os avanços tecnológicos, fundamentalmente nas áreas de informática e telecomunicações, produziram, nas últimas décadas, grandes transformações nos vários setores da economia e do mercado. Estes levaram por sua vez ao redimensionamento de amplos setores do trabalho, entre eles os estatais, de serviços, das comunicações em geral, das vendas, da educação, entre outros. Essas mudanças geraram também uma nova forma de trabalhar denominada de teletrabalho - teleworking. E é principalmente nessa forma de trabalho que, com a utilização das ferramentas tecnológicas, foi possível observar dois fenômenos bem marcantes, um conseqüência do outro: o uso da informática junto às ...
Rural Ethnic Minority Youth and Families in the United States
This book explores the risk and protective factors of rural life and minority status for youth and their families. It provides innovative perspectives on well-documented developmental challenges (e.g., poverty and lack of resources) as well as insights into the benefits of familial and cultural strengths. Coverage includes recent theories in child development, empirical studies of rural minority populations, and leading-edge interventions for urgent issues. The volume presents a spectrum of opportunities for understanding and providing services for youth in the United States through the lens of a diverse collection of ethnic minority experiences in rural settings. Topics featured in this vol...
Agriculture Handbook
Set includes revised editions of some issues.
