Feedback Control of Dynamic Bipedal Robot Locomotion presents cutting-edge, systematic methods for achieving stable, agile, and efficient locomotion in bipedal machines. The authors successfully describe dynamic locomotion in planar bipedal robots, from both theoretical and practical points of view. The fundamental principles can be used for the immediate improvement in control of existing robots and provide guidelines for improving the mechanical design of future robots. Researchers and practitioners seeking to move beyond the quasi-static, flat-footed walking of current powered bipedal robots and the easily toppled gaits of passive robots will find this text to be an invaluable resource.
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Systems & Controls
Reference
Professional

This easy-to-use resource provides a clear explanation of mixed modeling techniques and theories and demonstrates the use of popular statistical software procedures for fitting linear mixed models (LMMs). The authors fit LMMs based on both general and hierarchical model specifications, develop the model-building process step-by-step, and demonstrate the estimation, testing, and interpretation of fixed-effect parameters and covariance parameters associated with random effects. These concepts are illustrated through examples of real-world data sets using R, SAS, SPSS, HLM, and Stata that enable comparison of model fitting options and results across the software procedures. A supporting website provides software code and the data sets discussed in the book.
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Statistics & Computing
Statistical Theory & Methods
Statistics for the Biological Sciences
Reference
Professional

American Public Service: Radical Reform and the Merit System examines the innovations, strategies, and issues fueling the civil service reform debate. Offering diverse perspectives from expert contributors, this book looks at accomplished and considered reforms across the US, paying particular attention to questions regarding the operation, fairness and future of merit systems. Examples of ongoing change are presented, as are various controversies, including whether the relaxation of civil service protections against intrusion could lead to corruption. Other issues are identified, both those which may lead to reforms, and those likely to become hot button topics going forward.
• Public Administration and Public Policy
Public Administration & Management
Government
Reference
Professional

Isaac Newton fue, indiscutiblemente, uno de los más grandes científicos de la historia. Sus logros en el terrno de la matemática y la física representaron la culminación del movimiento precursor de la ciencia moderna. La biografía que presenta Richard Westfall desarrolla con todo detalle tanto su vida privada como su carrera científica, y ofrece un completo retrato de Newton como hombre, como científico, filósofo, teólogo, alquimista y figura pública, presidente de la Royal Society y director de la Casa de la Moneda. Es la biografía más accesible sobre esta gran figura.

Para lectores que desean llevar una vida natural beneficiándose de todas las propiedades curativas, nutritivas y de belleza que las hierbas pueden aportar, esta exhaustiva guía estudia en profundidad cada planta atendiendo a aspectos como la compra, el cultivo, los cuidados, los usos y aplicaciones.