'Kimon Nicolaides' The Natural Way to Draw is a sure bet . . . will improve your technique no end' Artists & Illustrators This essential guide to drawing by renowned art teacher Kimon Nicolaides is valued by both early students of art and accomplished artists alike. Consisting of 64 exercises, The Natural Way to Draw offers in-depth studies to be completed over the course of a year. Extensively illustrated with reproductions of the work of the Old Masters (including Rubens, Titian and Raphael) to the work of Van Gogh and Picasso, as well as the work of his students, these exercises help you begin to look at people and objects in a fresh way that will be the foundation of your drawing. Concentrating on mastering the key concepts of drawing that will make a drawing come alive, Nicolaides teaches how to convey gesture and action, expression and feeling in your work. Regarded as an inspiration to a generation of devoted young artists, The Natural Way to Draw captures Nicolaides' concrete system of art teaching.

This book presents, in a comprehensive way, current unmanned aviation regulation, airworthiness certification, special aircraft categories, pilot certification, federal aviation requirements, operation rules, airspace classes and regulation development models. It discusses unmanned aircraft systems levels of safety derived mathematically based on the corresponding levels for manned aviation. It provides an overview of the history and current status of UAS airworthiness and operational regulation worldwide. Existing regulations have been developed considering the need for a complete regulatory framework for UAS. It focuses on UAS safety assessment and functional requirements, achieved in terms of defining an "Equivalent Level of Safety," or ELOS, with that of manned aviation, specifying what the ELOS requirement entails for UAS regulations. To accomplish this, the safety performance of manned aviation is first evaluated, followed by a novel model to derive reliability requirements for achieving target levels of safety (TLS) for ground impact and mid-air collision accidents.It discusses elements of a viable roadmap leading to UAS integration in to the NAS. For this second edition of the book almost all chapters include major updates and corrections. There is also a new appendix chapter.

Conventional wisdom claims that the world is going broke, and that we must tighten our belts and accept poverty as the new normal. In a direct challenge to this view, Kimon Valaskakis, Professor of Economics, Futurist and former Canadian Ambassador to the OECD, claims the very opposite. Never in the history of civilization has Humanity been as rich as today. With an 70 trillion in world economic output for only 7 billion inhabitants of Planet Earth, there is a potential annual income of $10,000 per person. Instead, what we see is the juxtaposition of what he calls Buffets and Breadlines. A small percentage of the world population enjoys all-you-can-waste economic buffets, while the rest may be increasingly condemned to 1930's style breadlines. This gross mismanagement of the earth's resources masquerades as 'scarcity', which is then used to justify harsh austerity policies hurting everyone except the very rich. If the analysis of this first book is indeed valid, much of present public policy is doomed to fail and bound to lead to counter-productive results for the world economy. Couched in a new, yet old, genre of a philosophic play, emulating the Socratic dialogues, this book, part of a trilogy, depicts the deliberations of two dozen fictional characters who meet in Corfu, to 'change the world in three weeks.' The first book chronicles the findings of their first week, in colorful and dialectal style, with opposing ideas and opinions expressed, though in the friendly conviviality of a beautiful beach resort. The second and third books, which have yet to be published, will identify desirable alternatives to the status quo, and ultimately how do we get from here to there.

In the last decade, signi?cant changes have occurred in the ?eld of vehicle motion planning, and for UAVs in particular. UAV motion planning is especially dif?cult due to several complexities not considered by earlier planning strategies: the - creased importance of differential constraints, atmospheric turbulence which makes it impossible to follow a pre-computed plan precisely, uncertainty in the vehicle state, and limited knowledge about the environment due to limited sensor capabilities. These differences have motivated the increased use of feedback and other control engineering techniques for motion planning. The lack of exact algorithms for these problems and dif?culty inherent in characterizing approximation algorithms makes it impractical to determine algorithm time complexity, completeness, and even soundness. This gap has not yet been addressed by statistical characterization of experimental performance of algorithms and benchmarking. Because of this overall lack of knowledge, it is dif?cult to design a guidance system, let alone choose the algorithm. Throughout this paper we keep in mind some of the general characteristics and requirements pertaining to UAVs. A UAV is typically modeled as having velocity and acceleration constraints (and potentially the higher-order differential constraints associated with the equations of motion), and the objective is to guide the vehicle towards a goal through an obstacle ?eld. A UAV guidance problem is typically characterized by a three-dimensional problem space, limited information about the environment, on-board sensors with limited range, speed and acceleration constraints, and uncertainty in vehicle state and sensor data.

Book 1 of Plato's Republic is often treated as a merely negative prelude to the theory of justice presented in the main body of that book. This study argues that, though an introduction to later ideas, Book 1 has its own positive theme and function: to press for the acceptance of a certain perspective on justice that is opposed to conventional interpretations of it. This perspective requires that justice be seen as 'internal' to the power human beings have to render things (including themselves and their societies) good. The analysis of Plato's dramatic characterisation, as well as the discussion of Socrates' arguments, is guided by the thought that they form aspects of a complex overall strategy through which Plato hopes to overcome the resistance of his contemporaries to the 'Socratic' perspective on justice.

Since the late 1960s, there has been a revolution in robots and industrial automation, from the design of robots with no computing or sensorycapabilities (first-generation), to the design of robots with limited computational power and feedback capabilities (second-generation), and the design of intelligent robots (third-generation), which possess diverse sensing and decision making capabilities. The development of the theory of intelligent machines has been developed in parallel to the advances in robot design. This theory is the natural outcome of research and development in classical control (1950s), adaptive and learning control (1960s), self-organizing control (1970s) and intelligent control systems (1980s). The theory of intelligent machines involves utilization and integration of concepts and ideas from the diverse disciplines of science, engineering and mathematics, and fields like artificial intelligence, system theory and operations research. The main focus and motivation is to bridge the gap between diverse disciplines involved and bring under a common cover several generic methodologies pertaining to what has been defined as machine intelligence. Intelligent robotic systems are a specific application of intelligent machines. They are complex computer controlled robotic systems equipped with a diverse set of visual and non visual sensors and possess decision making and problem solving capabilities within their domain of operation. Their modeling and control is accomplished via analytical and heuristic methodologies and techniques pertaining to generalized system theory and artificial intelligence. Intelligent Robotic Systems: Theory, Design and Applications, presents and justifies the fundamental concepts and ideas associated with the modeling and analysis of intelligent robotic systems. Appropriate for researchers and engineers in the general area of robotics and automation, Intelligent Robotic Systems is both a solid reference as well as a text for a graduate level course in intelligent robotics/machines.

There has been significant interest for designing flight controllers for small-scale unmanned helicopters. Such helicopters preserve all the physical attributes of their full-scale counterparts, being at the same time more agile and dexterous. This book presents a comprehensive and well justified analysis for designing flight controllers for small-scale unmanned helicopters guarantying flight stability and tracking accuracy. The design of the flight controller is a critical and integral part for developing an autonomous helicopter platform. Helicopters are underactuated, highly nonlinear systems with significant dynamic coupling that needs to be considered and accounted for during controller design and implementation. Most reliable mathematical tools for analysis of control systems relate to modern control theory. Modern control techniques are model-based since the controller architecture depends on the dynamic representation of the system to be controlled. Therefore, the flight controller design problem is tightly connected with the helicopter modeling.

This book provides a step-by-step methodology for designing, evaluating and implementing efficient flight controllers for small-scale helicopters. Design issues that are analytically covered include:

An illustrative presentation of both linear and nonlinear models of ordinary differential equations representing the helicopter dynamics. A detailed presentation of the helicopter equations of motion is given for the derivation of both model types. In addition, an insightful presentation of the main rotor's mechanism, aerodynamics and dynamics is also provided. Both model types are of low complexity, physically meaningful and capable of encapsulating the dynamic behavior of a large class of small-scale helicopters.

An illustrative and rigorous derivation of mathematical control algorithms based on both the linear and nonlinear representation of the helicopter dynamics. Flight controller designs guarantee that the tracking objectives of the helicopter's inertial position (or velocity) and heading are achieved. Each controller is carefully constructed by considering the small-scale helicopter's physical flight capabilities. Concepts of advanced stability analysis are used to improve the efficiency and reduce the complexity of the flight control system. Controller designs are derived in both continuous time and discrete time covering discretization issues, which emerge from the implementation of the control algorithm using microprocessors.

Presentation of the most powerful, practical and efficient methods for extracting the helicopter model parameters based on input/output responses, collected by the measurement instruments. This topic is of particular importance for real-life implementation of the control algorithms.

This book is suitable for students and researches interested in the development and the mathematical derivation of flight controllers for small-scale helicopters. Background knowledge in modern control is required."

Thiseditedbookispublishedin honorofDr. GeorgeJ. Vachtsevanos, ourDr. V, c- rently Professor Emeritus, School of Electrical and Computer Engineering, Georgia Institute of Technology, on the occasion of his 70th birthday and for his more than 30 years of contribution to the discipline of Intelligent Control and its application to a wide spectrum of engineering and bioengineering systems. The book is nothing but a very small token of appreciation from Dr. V's former graduate students, his peers and colleagues in the profession - and not only - to the Scientist, the Engineer, the Professor, the mentor, but most important of all, to the friend and human being. All those who have met Dr. V over the years and haveinteractedwith himin someprofessionaland/orsocial capacityunderstandthis statement: Georgenevermadeanybodyfeelinferiortohim, hehelpedandsupported everybody, and he was there when anybody needed him I was not Dr. V's student. I rst met him and his wife Athena more than 26 years ago during one of their visits to RPI, in the house of my late advisor, Dr. George N. Saridis. Since then, I have been very fortunate to have had and continue to have interactions with him. It is not an exaggeration if I say that we all learned a lot from him.

The past decade has seen tremendous interest in the production and refinement of unmanned aerial vehicles, both fixed-wing, such as airplanes and rotary-wing, such as helicopters and vertical takeoff and landing vehicles. This book provides a diversified survey of research and development on small and miniature unmanned aerial vehicles of both fixed and rotary wing designs. From historical background to proposed new applications, this is the most comprehensive reference yet.

Unmanned Aircraft Systems (UAS) have seen unprecedented levels of growth during the last decade in both military and civilian domains. However, it is anticipated that civilian applications will be dominant in the future, although there are still barriers to be overcome and technical challenges to be met. For example, integrating UAS into civilian space, fully autonomous navigation, see-detect-and-avoid systems, smart UAS designs, system integration, vision-based navigation, logistics and training, to name but a few areas, will be of prime importance in the near future. This special volume is the outcome of research presented at the International Symposium on Unmanned Aerial Vehicles, held in Dubai in June 2010, and presents state-of-the-art findings on topics related to: UAS operations and integration into the national airspace system; UAS navigation and control; micro-, mini-, small UAVs; UAS simulation testbeds and frameworks; UAS research platforms and applications; UAS applications. This book aims at serving as a guide tool on UAS for engineers and practitioners, academics, government agencies and industry. This is a hardbound spinoff from the Journal of Intelligent and Robotic Systems, Volume 61:1-4, 2011.

Pentecostalism is the fastest growing religious movement in the world, currently estimated to have at least 500 million adherents. In the movement's early years, most Pentecostal converts lived in relative poverty, leading many scholars to regard the new religion as a form of spiritual compensation. Yet the rapidly shifting social ecology of Pentecostal Christians includes many middle-class individuals, as well as an increasing number of young adults attracted by the music and vibrant worship of these churches. The stereotypical view of Pentecostals as ''other-worldly'' and disengaged from politics and social ministry is also being challenged, especially as Pentecostals-including many who are committed to working for social and political change-constitute growing minorities in many countries. Spirit and Power addresses three main questions: Where is Pentecostalism growing globally? Why it is growing? What is its social and political impact? The contributors include theologians, historians, and social scientists, bringing diverse disciplinary perspectives to these empirical questions. The essays draw on extensive survey research as well as in-depth ethnographic field methods, with analyses offering diverging and sometimes competing explanations for the growth and impact of Pentecostalism around the world. This volume puts Pentecostalism into a global context that examines not only theology and religious structures, but the social, cultural, and economic settings in which it is, or is not, growing, as well as the social and political development of Pentecostal groups in different societies around the world.

Two generations after democracy, South Africa’s public schooling system continues to underperform. Despite some gains, many South African children still don’t achieve basic academic milestones, and teachers are often blamed.

Where Light Shines Through allows glimmers of light to shine through the darkness of the public education story and reveals can-do teachers who are excelling despite the odds. It explores what we can learn from these teachers to build the quality of the schooling sector and the public sector more broadly – and turns our gaze momentarily away from public officials who are in power, towards those who are in service.

The remarkable stories of sixteen South African teachers from all over the country, illustrated with portraits from the Artist Proof Studio, show that while our attitude to life is often informed by our experiences, our attitude nevertheless remains our choice.

1991 Outstanding Academic Book of the Year--"Choice." "Friar and Mysiades deserve much credit for providing, in one volume, the first full-range sampling of this fecund, variegated, and highly original poet in English."--"The New Republic"

* proposes robust time-varying formation control method * discusses multiple uncertainties involving parameter uncertainties, nonlinearities, coupled dynamics, and external disturbances * provides experimental and simulation results are given. * discusses the influence of communication delay and actuator fault

This book introduces a comprehensive and mathematically rigorous controller design for families of nonlinear systems with time-varying parameters and unstructured uncertainties. Although the presented methodology is general, the specific family of systems considered is the latest, NextGen, unconventional fixed-wing unmanned aircraft with circulation control or morphing wings, or a combination of both. The approach considers various sources of model and parameter uncertainty, while the controller design depends not on a nominal plant model, but instead on a family of admissible plants. In contrast to existing controller designs that consider multiple models and multiple controllers, the proposed approach is based on the 'one controller fits all models' within the unstructured uncertainty interval. The book presents a modeling-based analysis and synthesis approach with additive uncertainty weighting functions for accurate realization of the candidate systems. This differs significantly from existing designs in that it is capable of handling time-varying characteristics. This research monograph is suitable for scientists, engineers, researchers and graduate students with a background in control system theory who are interested in complex engineering nonlinear systems.

Takes a practical results-focused approach to ecology Adopts an engineering focus Covers all the main contemporary environmental problems Presents insights grounded in the author's extensive teaching experience Electronic versions of figures from the book are available with qualifying course adoption.

In the last decade, signi?cant changes have occurred in the ?eld of vehicle motion planning, and for UAVs in particular. UAV motion planning is especially dif?cult due to several complexities not considered by earlier planning strategies: the - creased importance of differential constraints, atmospheric turbulence which makes it impossible to follow a pre-computed plan precisely, uncertainty in the vehicle state, and limited knowledge about the environment due to limited sensor capabilities. These differences have motivated the increased use of feedback and other control engineering techniques for motion planning. The lack of exact algorithms for these problems and dif?culty inherent in characterizing approximation algorithms makes it impractical to determine algorithm time complexity, completeness, and even soundness. This gap has not yet been addressed by statistical characterization of experimental performance of algorithms and benchmarking. Because of this overall lack of knowledge, it is dif?cult to design a guidance system, let alone choose the algorithm. Throughout this paper we keep in mind some of the general characteristics and requirements pertaining to UAVs. A UAV is typically modeled as having velocity and acceleration constraints (and potentially the higher-order differential constraints associated with the equations of motion), and the objective is to guide the vehicle towards a goal through an obstacle ?eld. A UAV guidance problem is typically characterized by a three-dimensional problem space, limited information about the environment, on-board sensors with limited range, speed and acceleration constraints, and uncertainty in vehicle state and sensor data.

Unmanned Aircraft Systems (UAS) have seen unprecedented levels of growth during the last decade in both military and civilian domains. However, it is anticipated that civilian applications will be dominant in the future, although there are still barriers to be overcome and technical challenges to be met. For example, integrating UAS into civilian space, fully autonomous navigation, see-detect-and-avoid systems, smart UAS designs, system integration, vision-based navigation, logistics and training, to name but a few areas, will be of prime importance in the near future. This special volume is the outcome of research presented at the International Symposium on Unmanned Aerial Vehicles, held in Dubai in June 2010, and presents state-of-the-art findings on topics related to: UAS operations and integration into the national airspace system; UAS navigation and control; micro-, mini-, small UAVs; UAS simulation testbeds and frameworks; UAS research platforms and applications; UAS applications. This book aims at serving as a guide tool on UAS for engineers and practitioners, academics, government agencies and industry. This is a hardbound spinoff from the Journal of Intelligent and Robotic Systems, Volume 61:1-4, 2011.

This book presents, in a comprehensive way, current unmanned aviation regulation, airworthiness certification, special aircraft categories, pilot certification, federal aviation requirements, operation rules, airspace classes and regulation development models. It discusses unmanned aircraft systems levels of safety derived mathematically based on the corresponding levels for manned aviation. It provides an overview of the history and current status of UAS airworthiness and operational regulation worldwide. Existing regulations have been developed considering the need for a complete regulatory framework for UAS. It focuses on UAS safety assessment and functional requirements, achieved in terms of defining an "Equivalent Level of Safety", or ELOS, with that of manned aviation, specifying what the ELOS requirement entails for UAS regulations. To accomplish this, the safety performance of manned aviation is first evaluated, followed by a novel model to derive reliability requirements for achieving target levels of safety (TLS) for ground impact and mid-air collision accidents.It discusses elements of a viable roadmap leading to UAS integration in to the NAS. For this second edition of the book almost all chapters include major updates and corrections. There is also a new appendix chapter.

Since the late 1960s, there has been a revolution in robots and industrial automation, from the design of robots with no computing or sensorycapabilities (first-generation), to the design of robots with limited computational power and feedback capabilities (second-generation), and the design of intelligent robots (third-generation), which possess diverse sensing and decision making capabilities. The development of the theory of intelligent machines has been developed in parallel to the advances in robot design. This theory is the natural outcome of research and development in classical control (1950s), adaptive and learning control (1960s), self-organizing control (1970s) and intelligent control systems (1980s). The theory of intelligent machines involves utilization and integration of concepts and ideas from the diverse disciplines of science, engineering and mathematics, and fields like artificial intelligence, system theory and operations research. The main focus and motivation is to bridge the gap between diverse disciplines involved and bring under a common cover several generic methodologies pertaining to what has been defined as machine intelligence. Intelligent robotic systems are a specific application of intelligent machines. They are complex computer controlled robotic systems equipped with a diverse set of visual and non visual sensors and possess decision making and problem solving capabilities within their domain of operation. Their modeling and control is accomplished via analytical and heuristic methodologies and techniques pertaining to generalized system theory and artificial intelligence. Intelligent Robotic Systems: Theory, Design and Applications, presents and justifies the fundamental concepts and ideas associated with the modeling and analysis of intelligent robotic systems. Appropriate for researchers and engineers in the general area of robotics and automation, Intelligent Robotic Systems is both a solid reference as well as a text for a graduate level course in intelligent robotics/machines.

Pentecostalism is the fastest growing religious movement in the world, currently estimated to have at least 500 million adherents. In the movement's early years, most Pentecostal converts lived in relative poverty, leading many scholars to regard the new religion as a form of spiritual compensation. Yet the rapidly shifting social ecology of Pentecostal Christians includes many middle-class individuals, as well as an increasing number of young adults attracted by the music and vibrant worship of these churches. The stereotypical view of Pentecostals as ''other-worldly'' and disengaged from politics and social ministry is also being challenged, especially as Pentecostals-including many who are committed to working for social and political change-constitute growing minorities in many countries. Spirit and Power addresses three main questions: Where is Pentecostalism growing globally? Why it is growing? What is its social and political impact? The contributors include theologians, historians, and social scientists, bringing diverse disciplinary perspectives to these empirical questions. The essays draw on extensive survey research as well as in-depth ethnographic field methods, with analyses offering diverging and sometimes competing explanations for the growth and impact of Pentecostalism around the world. This volume puts Pentecostalism into a global context that examines not only theology and religious structures, but the social, cultural, and economic settings in which it is, or is not, growing, as well as the social and political development of Pentecostal groups in different societies around the world.

There has been significant interest for designing flight controllers for small-scale unmanned helicopters. Such helicopters preserve all the physical attributes of their full-scale counterparts, being at the same time more agile and dexterous. This book presents a comprehensive and well justified analysis for designing flight controllers for small-scale unmanned helicopters guarantying flight stability and tracking accuracy. The design of the flight controller is a critical and integral part for developing an autonomous helicopter platform. Helicopters are underactuated, highly nonlinear systems with significant dynamic coupling that needs to be considered and accounted for during controller design and implementation. Most reliable mathematical tools for analysis of control systems relate to modern control theory. Modern control techniques are model-based since the controller architecture depends on the dynamic representation of the system to be controlled. Therefore, the flight controller design problem is tightly connected with the helicopter modeling.

This book provides a step-by-step methodology for designing, evaluating and implementing efficient flight controllers for small-scale helicopters. Design issues that are analytically covered include:

An illustrative presentation of both linear and nonlinear models of ordinary differential equations representing the helicopter dynamics. A detailed presentation of the helicopter equations of motion is given for the derivation of both model types. In addition, an insightful presentation of the main rotor's mechanism, aerodynamics and dynamics is also provided. Both model types are of low complexity, physically meaningful and capable of encapsulating the dynamic behavior of a large class of small-scale helicopters.

An illustrative and rigorous derivation of mathematical control algorithms based on both the linear and nonlinear representation of the helicopter dynamics. Flight controller designs guarantee that the tracking objectives of the helicopter's inertial position (or velocity) and heading are achieved. Each controller is carefully constructed by considering the small-scale helicopter's physical flight capabilities. Concepts of advanced stability analysis are used to improve the efficiency and reduce the complexity of the flight control system. Controller designs are derived in both continuous time and discrete time covering discretization issues, which emerge from the implementation of the control algorithm using microprocessors.

Presentation of the most powerful, practical and efficient methods for extracting the helicopter model parameters based on input/output responses, collected by the measurement instruments. This topic is of particular importance for real-life implementation of the control algorithms.

This book is suitable for students and researches interested in the development and the mathematical derivation of flight controllers for small-scale helicopters. Background knowledge in modern control is required."