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Stall Points by Matthew S. Olson,Derek Van Bever Pdf
In this probing study of the growth experience of Fortune 100-sized firms across the past fifty years, authors Olson and van Bever find that great companies stop growing not because of market saturation, government regulation, or other external constraints but rather because of a finite set of common strategy mistakes that appear time after time, across industries, across geography, and across the economic cycle."--Jacket.
STALL POINTS : Most Companies Stop Growing--Yours Doesn't Have To by Matthew S Olson & Derek van Bever Pdf
Very few large companies manage to avoid stalls in revenue growth. These stalls are not attributable to the natural business cycle. Rather, careful analysis reveals that the vast majority of such stalls are the direct result of strategic choices made by corporate leaders. In short, stoppages in growth are almost always avoidable. This extensively researched book analyzes the growth experiences of more than six hundred Fortune 100 companies over the past fifty years to identify why growth stalls and to discover how to rectify a stall in progress or, even better, avoid one. Board members and executives in companies of all sizes will find this book a practical and essential resource. Matthew S. Olson and Derek van Bever investigate the incidence and consequences of growth stalls in major corporations, then probe the root causes. Examining hundreds of stall points, the authors conclude that the greatest threat to a company’s growth is posed by obsolete strategic assumptions that undermine market position, and by breakdowns in innovation and talent management. The study includes a selection of practices for articulating and monitoring strategic assumptions and concludes with a self-test built around fifty “Red Flag†warning signs of an impending growth stall.
Determination of Surge and Stall Limits of an Axial-flow Turbojet Engine for Control Applications by Ross D. Schmidt,George Vasu,Edward W. McGraw Pdf
During the course of an investigation of an axial-flow turbojet engine in the Lewis altitude wind tunnel, limitations on the transient operation of the engine were determined to relation to two altitudes and exhaust-nozzle-areas. Below approximately 70 percent of the generalized engine rotational speed, a high-frequency oscillation (stall) at the compressor inlet limited transient operation of the engine. Over 70 percent of the engine speed, transient operation was limited by a low-frequency oscillation (surge), which occurred throughout the engine.
Combinatorial Algebraic Geometry by Gregory G. Smith,Bernd Sturmfels Pdf
This volume consolidates selected articles from the 2016 Apprenticeship Program at the Fields Institute, part of the larger program on Combinatorial Algebraic Geometry that ran from July through December of 2016. Written primarily by junior mathematicians, the articles cover a range of topics in combinatorial algebraic geometry including curves, surfaces, Grassmannians, convexity, abelian varieties, and moduli spaces. This book bridges the gap between graduate courses and cutting-edge research by connecting historical sources, computation, explicit examples, and new results.
Investigation of Lateral Control Near the Stall by Fred E. Weick Pdf
Flight tests were made with a typical light airplane to investigate possibilities for obtaining reliable control at low flight speeds. It was found that satisfactory lateral control occurred consistently, even under conditions simulating extremely gusty air, at angles of attack approximately 2 degrees below that for the maximum lift coefficient (or the stall of the wing as a whole). This 2 degree margine was substantially the same both with full power and with the engine throttled and throughout the range of center-of-gravity locations tested. Supplementary tests were then made on the control at high angles of attack under actual gusty air conditions, on the possibility of entering spins, and on the amount of elevator control required for normal three-point landings. It was found that with the original plain untwisted wing obtaining the constant 2 degree margin below the stall required widely different elevator deflections for the range of power and center-of-gravity locations tested. Also, none of these settings ws high enough to produce a three-point landing.
Fluid Dynamics and Heat Transfer of Turbomachinery by Budugur Lakshminarayana Pdf
Over the past three decades, information in the aerospace and mechanical engineering fields in general and turbomachinery in particular has grown at an exponential rate. Fluid Dynamics and Heat Transfer of Turbomachinery is the first book, in one complete volume, to bring together the modern approaches and advances in the field, providing the most up-to-date, unified treatment available on basic principles, physical aspects of the aerothermal field, analysis, performance, theory, and computation of turbomachinery flow and heat transfer. Presenting a unified approach to turbomachinery fluid dynamics and aerothermodynamics, the book concentrates on the fluid dynamic aspects of flows and thermodynamic considerations rather than on those related to materials, structure, or mechanical aspects. It covers the latest material and all types of turbomachinery used in modern-day aircraft, automotive, marine, spacecraft, power, and industrial applications; and there is an entire chapter devoted to modern approaches on computation of turbomachinery flow. An additional chapter on turbine cooling and heat transfer is unique for a turbomachinery book. The author has undertaken a systematic approach, through more than three hundred illustrations, in developing the knowledge base. He uses analysis and data correlation in his discussion of most recent developments in this area, drawn from over nine hundred references and from research projects carried out by various organizations in the United States and abroad. This book is extremely useful for anyone involved in the analysis, design, and testing of turbomachinery. For students, it can be used as a two-semester course of senior undergraduate or graduate study: the first semester dealing with the basic principles and analysis of turbomachinery, the second exploring three-dimensional viscid flows, computation, and heat transfer. Many sections are quite general and applicable to other areas in fluid dynamics and heat transfer. The book can also be used as a self-study guide to those who want to acquire this knowledge. The ordered, meticulous, and unified approach of Fluid Dynamics and Heat Transfer of Turbomachinery should make the specialization of turbomachinery in aerospace and mechanical engineering much more accessible to students and professionals alike, in universities, industry, and government. Turbomachinery theory, performance, and analysis made accessible with a new, unified approach For the first time in nearly three decades, here is a completely up-to-date and unified approach to turbomachinery fluid dynamics and aerothermodynamics. Combining the latest advances, methods, and approaches in the field, Fluid Dynamics and Heat Transfer of Turbomachinery features: The most comprehensive and complete coverage of the fluid dynamics and aerothermodynamics of turbomachinery to date A spotlight on the fluid dynamic aspects of flows and the thermodynamic considerations for turbomachinery (rather than the structural or material aspects) A detailed, step-by-step presentation of the analytical and computational models involved, which allows the reader to easily construct a flowchart from which to operate Critical reviews of all the existing analytical and numerical models, highlighting the advantages and drawbacks of each Comprehensive coverage of turbine cooling and heat transfer, a unique feature for a book on turbomachinery An appendix of basic computation techniques, numerous tables, and listings of common terminology, abbreviations, and nomenclature Broad in scope, yet concise, and drawing on the author's teaching experience and research projects for government and industry, Fluid Dynamics and Heat Transfer of Turbomachinery explains and simplifies an increasingly complex field. It is an invaluable resource for undergraduate and graduate students in aerospace and mechanical engineering specializing in turbomachinery, for research and design engineers, and for all professionals who are—or wish to be—at the cutting edge of this technology.
Unsteady Aerodynamics, Aeroacoustics and Aeroelasticity of Turbomachines by Kenneth C. Hall,Robert E. Kielb,Jeffrey P. Thomas Pdf
This textbook is a collection of technical papers that were presented at the 10th International Symposium on Unsteady Aerodynamics, Aeroacoustics, and Aeroelasticity of Turbomachines held September 8-11, 2003 at Duke University in Durham, North Carolina. The papers represent the latest in state of the art research in the areas of aeroacoustics, aerothermodynamics, computational methods, experimental testing related to flow instabilities, flutter, forced response, multistage, and rotor-stator effects for turbomachinery.
