New Releases by Paul Oh

This text is a thorough treatment of the rapidly growing area of aerial manipulation. It details all the design steps required for the modeling and control of unmanned aerial vehicles (UAV) equipped with robotic manipulators. Starting with the physical basics of rigid-body kinematics, the book gives an in-depth presentation of local and global coordinates, together with the representation of orientation and motion in fixed- and moving-coordinate systems. Coverage of the kinematics and dynamics of unmanned aerial vehicles is developed in a succession of popular UAV configurations for multirotor systems. Such an arrangement, supported by frequent examples and end-of-chapter exercises, leads the reader from simple to more complex UAV configurations. Propulsion-system aerodynamics, essential in UAV design, is analyzed through blade-element and momentum theories, analysis which is followed by a description of drag and ground-aerodynamic effects. The central part of the book is dedicated to aerial-manipulator kinematics, dynamics, and control. Based on foundations laid in the opening chapters, this portion of the book is a structured presentation of Newton–Euler dynamic modeling that results in forward and backward equations in both fixed- and moving-coordinate systems. The Lagrange–Euler approach is applied to expand the model further, providing formalisms to model the variable moment of inertia later used to analyze the dynamics of aerial manipulators in contact with the environment. Using knowledge from sensor data, insights are presented into the ways in which linear, robust, and adaptive control techniques can be applied in aerial manipulation so as to tackle the real-world problems faced by scholars and engineers in the design and implementation of aerial robotics systems. The book is completed by path and trajectory planning with vision-based examples for tracking and manipulation.

As the character of conflict in the 21st century evolves, the Army's strength will continue to rest on our values, our ethos, and our people. Our Soldiers and leaders must remain true to these values as they operate in increasingly complex environments where moral-ethical failures can have strategic implications. Most of our Soldiers do the right thing--and do it well--time and again under intense pressure. But we must stay ever vigilant in upholding our high professional standards, mindful of the strains that accompany repeated combat deployments in the longest war our country has fought with an all-volunteer force. We must think critically about our Professional Military Ethic and promote dialogue at all levels as we deepen our understanding of what this time-honored source of strength means to the profession today.

"This essay offers a proposal for the missing constructs and language with which we can more precisely think about and examine the Army's Professional Military Ethic, starting with its macro context which is the profession's culture. We examine three major long-term influences on that culture and its core ethos, thus describing how they evolve over time. We contend that in the present era of persistent conflict, we are witnessing dynamic changes within these three influences. In order to analyze these changes, we introduce a more detailed framework which divides the Ethic into its legal and moral components, then divide each of these into their institutional and individual manifestations. Turning from description to analysis, we also examine to what extent, if any, recent doctrinal adaptations by the Army (FM 3-0, 3-24, and 6-22, etc.) indicate true evolution in the essential nature of the profession's Ethic. Then, we present what we believe to be the most significant ethical challenge facing the Army profession -- the moral development of Army leaders, moving them from 'values to virtues' in order that they, as Army professionals, can consistently achieve the high quality of moral character necessary to apply effectively and, in a trustworthy manner, their renowned military-technical competencies."--Page x.

What makes me special? How do I grow? What happens when I get a cut? This fun-filled theme unit taps into children's natural curiosity about their bodies and what makes them unique.