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Showing 80,876 through 80,900 of 85,171 results

Two-dimensional Product-cubic Systems, Vol.II: Product-quadratic Vector Fields

by Albert C. Luo

This book, the sixth of 15 related monographs, discusses singularity and networks of equilibriums and 1-diemsnional flows in product quadratic and cubic systems. The author explains how, in the networks, equilibriums have source, sink and saddles with counter-clockwise and clockwise centers and positive and negative saddles, and the 1-dimensional flows includes source and sink flows, parabola flows with hyperbolic and hyperbolic-secant flows. He further describes how the singular equilibriums are saddle-source (sink) and parabola-saddles for the appearing bifurcations, and the 1-dimensional singular flows are the hyperbolic-to-hyperbolic-secant flows and inflection source (sink) flows for 1-dimensional flow appearing bifurcations, and the switching bifurcations are based on the infinite-equilibriums, including inflection-source (sink), parabola-source (sink), up-down and down-up upper-saddle (lower-saddle), up-down (down-up) sink-to-source and source-to-sink, hyperbolic and hyperbolic-secant saddles. The diagonal-inflection upper-saddle and lower-saddle infinite-equilibriums are for the double switching bifurcations. The networks of hyperbolic flows with connected saddle, source and center are presented, and the networks of the hyperbolic flows with paralleled saddle and center are also illustrated. Readers will learn new concepts, theory, phenomena, and analysis techniques. Product-quadratic and product cubic systems Self-linear and crossing-quadratic product vector fields Self-quadratic and crossing-linear product vector fields Hybrid networks of equilibriums and 1-dimensional flows Up-down and down-up saddle infinite-equilibriums Up-down and down-up sink-to-source infinite-equilibriums Inflection-source (sink) Infinite-equilibriums Diagonal inflection saddle infinite-equilibriums Infinite-equilibrium switching bifurcations

Two-dimensional Self-independent Variable Cubic Nonlinear Systems

by Albert C. Luo

This book, the third of 15 related monographs, presents systematically a theory of self-independent cubic nonlinear systems. Here, at least one vector field is self-cubic, and the other vector field can be constant, self-linear, self-quadratic, or self-cubic. For constant vector fields in this book, the dynamical systems possess 1-dimensional flows, such as source, sink and saddle flows, plus third-order source and sink flows. For self-linear and self-cubic systems discussed, the dynamical systems possess source, sink and saddle equilibriums, saddle-source and saddle-sink, third-order sink and source (i.e, (3rd SI:SI)-sink and (3rdSO:SO)-source) and third-order source (i.e., (3rd SO:SI)-saddle, (3rd SI, SO)-saddle) . For self-quadratic and self-cubic systems, in addition to the first and third-order sink, source and saddles plus saddle-source and saddle-sink, there are (3:2)-saddle-sink and (3:2) saddle-source and double-saddles. For the two self-cubic systems, (3:3)-source, sink and saddles exist. Finally, the author describes that homoclinic orbits without centers can be formed, and the corresponding homoclinic networks of source, sink and saddles exists. Readers will learn new concepts, theory, phenomena, and analytic techniques, including Constant and crossing-cubic systems Crossing-linear and crossing-cubic systems Crossing-quadratic and crossing-cubic systems Crossing-cubic and crossing-cubic systems Appearing and switching bifurcations Third-order centers and saddles Parabola-saddles and inflection-saddles Homoclinic-orbit network with centers Appearing bifurcations

Tycho and Kepler: The Unlikely Partnership that Forever Changed our Understanding of the Heavens

by Kitty Ferguson

The extraordinary, unlikely tale of Tycho Brahe and Johannes Kepler and their enormous contribution to astronomy and understanding of the cosmos is one of the strangest stories in the history of science.Kepler was a poor, devoutly religious teacher with a genius for mathematics. Brahe was an arrogant, extravagant aristocrat who possessed the finest astronomical instruments and observations of the time, before the telescope. Both espoused theories that seem off-the-wall to modern minds, but their fateful meeting in Prague in 1600 was to change the future of science.Set in one of the most turbulent and colourful eras in European history, when medieval was giving way to modern, Tycho and Kepler is a double biography of these two remarkable men.

Tyler's Herbs of Choice: The Therapeutic Use of Phytomedicinals, Third Edition

by Dennis V.C. Awang

Does Echinacea fight the common cold? Does St. John's Wort (SJW) really counteract depression? What about chondroitin for joint health? Today's healthcare professionals are increasingly confronted with questions from patients who want to use herbal supplements to treat various conditions. A critical and scientific assessment of medicinal plant rese

Tyler's Honest Herbal: A Sensible Guide to the Use of Herbs and Related Remedies

by Steven Foster

Here is the fourth edition of Tyler's Honest Herbal: A Sensible Guide to the Use of Herbs and Related Remedies, providing essential botanical information as well as folkloric background of herbal remedies in a clear, accessible style. Unlike other herb books, this book gives you a serious evaluation of both the positive and negative features of the

Type 2 Diabetes

by Claire Stocker

Diabetes is now reaching epidemic proportions, and the associated complications of this disease can be disabling and even life-threatening. In Type 2 Diabetes: Methods and Protocols, leading investigators provide up-to-date explanations of commonly used laboratory protocols used in diabetes research. Covering the commonly described in vivo and in vitro model systems, the volume ultimately leads to an overall view of how cellular dysfunction and degeneration leads to susceptibility and diabetes disease progression. Written in the highly successful Methods in Molecular BiologyTM series format, chapters include brief introductions to their respective subjects, lists of the necessary materials and reagents, step-by-step, readily reproducible protocols, and expert notes on troubleshooting and avoiding known pitfalls. Comprehensive and cutting-edge, Type 2 Diabetes: Methods and Protocols offers succinct, proven techniques to aid research scientists and clinicians in continuing the study of this debilitating disease.

Type 2 Diabetes: Methods and Protocols (Methods in Molecular Biology #2076)

by Claire J. Stocker

This second edition volume expands on the previous editions with updates on the commonly used techniques and analysis used by clinicians and scientists to study diabetes. The chapters in this book cover topics such as nutritional models of type 2 diabetes mellitus; the isolation and purification of rodent pancreatic islets of Langerhans; nitric oxide and redox state measurements in pancreatic beta cells; and primary adipocytes as a model for insulin sensitivity. Written in the highly successful Methods in Molecular Biology series format, chapters include introductions to their respective topics, lists of the necessary materials and reagents, step-by-step, readily reproducible laboratory protocols, and tips on troubleshooting and avoiding known pitfalls.Cutting-edge and practical, Type 2 Diabetes: Methods and Protocols, Second Edition is a valuable resource for all researchers who are interested in learning more about this important and evolving field.

Type Specimens of Fossil Fishes: Catalogue of the University of Alberta Laboratory for Vertebrate Paleontology

by John Clay Bruner

The Laboratory for Vertebrate Paleontology at the University of Allberta houses type specimens of fossil fishes. This book is a catalogue of these specimens. Included for each entry is taxonomy, detailed collection locality information, the citation wherein the species was originally described, and a list of individual type specimens. This is the first list ever compiled of the fossil fish types deposited in the collections of the University of Alberta Laboratory for Vertebrate Paleontology (UALVP). This collection contains 88 fish holotypes, 966 fish paratypes, 55 casts of fish holotypes from other museums, and 20 casts of fish paratypes from other museums. Key selling features: List all of the type specimens of fossil fishes currently housed in the collection of the Laboratory of Vertebrate Paleontology at the University of Alberta in Edmonton, Canada. Provides details of all 88 holotypes and nearly 1000 paratypes as well as casts of types specimens held in other museum collections. Includes information on unpublished "types" - type specimens of not yet described new species.

Type-2 Fuzzy Logic and Systems: Dedicated to Professor Jerry Mendel for his Pioneering Contribution (Studies in Fuzziness and Soft Computing #362)

by Oscar Castillo Hani Hagras Robert John

This book explores recent perspectives on type-2 fuzzy sets. Written as a tribute to Professor Jerry Mendel for his pioneering works on type-2 fuzzy sets and systems, it covers a wide range of topics, including applications to the Go game, machine learning and pattern recognition, as well as type-2 fuzzy control and intelligent systems. The book is intended as a reference guide for the type-2 fuzzy logic community, yet it aims also at other communities dealing with similar methods and applications.

Type-2 Fuzzy Neural Networks and Their Applications

by Rafik Aziz Aliev Babek Ghalib Guirimov

This book deals with the theory, design principles, and application of hybrid intelligent systems using type-2 fuzzy sets in combination with other paradigms of Soft Computing technology such as Neuro-Computing and Evolutionary Computing. It provides a self-contained exposition of the foundation of type-2 fuzzy neural networks and presents a vast compendium of its applications to control, forecasting, decision making, system identification and other real problems. Type-2 Fuzzy Neural Networks and Their Applications is helpful for teachers and students of universities and colleges, for scientists and practitioners from various fields such as control, decision analysis, pattern recognition and similar fields.

Type-3 Fuzzy Logic and Fractal Theory for Medical Diagnosis (SpringerBriefs in Applied Sciences and Technology)

by Oscar Castillo Patricia Melin

This book is intended to be a reference for scientists and engineers interested in applying type-3 fuzzy logic and fractal theory techniques in medical diagnosis. In this book, a new model based on type-3 fuzzy logic and fractal theory for applications in medical diagnosis is presented. The main idea is that a higher type and order of fuzzy logic can help in solving various diagnosis problems and find better results. In addition, fractal theory is also employed for enhancing medical diagnosis. In this regard, several hybrid intelligent methods are offered. In this book, the authors test the proposed methods using several medical diagnosis problems, like diagnosis of problems in the brain, hearth, lungs, and others. The authors can notice that when type-3 fuzzy systems are implemented to model the behavior of systems, the results in diagnosis are enhanced, because the management of uncertainty is better. For this reason, the authors consider in this book the proposed methods using type-3 fuzzy systems and fractal theory to improve the diagnosis in complex medical problems.

Type-B Cytochromes: Sensors and Switches

by J.L. Kiel

This book describes cellular level sensors that act as switches, turning on gene expression and other metabolic processes necessary for cell survival and differentiation. These responses can also initiate programmed cell death or activate latent human immunodeficiency virus or animal leukemia viruses. These redox sensors are nonspecific in sensitivity but specific in response. Unlike ligand/antiligand-type specific sensors, they respond to ionizing and ultraviolet radiations, pH gradients, heat, light, electric and magnetic fields, redox chemicals, mechanical stress, and other nonspecific stressors. The sensors are type-b cytochromes, including NADPH oxidases, NO synthases, and nitrogen oxide reductases. The intense radiation of early pre-biotic earth may have been the evolutionary driving force for the development of their common ancestor.

Typicality Reasoning in Probability, Physics, and Metaphysics (New Directions in the Philosophy of Science)

by Dustin Lazarovici

This book provides a comprehensive investigation into the concept of typicality and its significance for physics and the philosophy of science. It identifies typicality as a fundamental way of reasoning, central to how natural laws explain and are tested against phenomena. The book discusses various applications of typicality to foundational questions in physics and beyond.These include:a unified interpretation of objective probabilities in classical mechanics and quantum mechanicsa detailed discussion of Boltzmann's statistical mechanics, entropy, and the second law of thermodynamicsa novel account of the asymmetry of causation and the arrow of time Finally, the book turns to the question: "What are laws of nature"? It argues that typicality extends to a powerful way of reasoning in metaphysics that can and should inform our commitments about the fundamental ontology of the world. On this basis, it develops an argument against the Humean best system account, according to which laws of nature are merely an efficient summary of contingent regularities.

Tyrannical Minds: Narcissism, Personality, And Dictatorship

by Dean A. Haycock

An incisive examination into the pairing of psychology and situation that creates despotic leaders from the author of Murderous Minds. Not everyone can become a tyrant. It requires a particular confluence of events to gain absolute control over entire nations. First, you must be born with the potential to develop brutal personality traits. Often, these are combined in “The Dark Triad” of malignant narcissism, Machiavellianism and psychopathy, as well as elements of paranoia, and an extraordinary ambition to achieve control over others. Second, your predisposition to antisocial behavior must be developed and strengthened during childhood. You might suffer physical and/or psychological abuse, or grow up in trying times. Finally, you must come of age when the political system of your country is unstable. Together, these events establish a basis for a rise to power, one that Joseph Stalin, Adolf Hitler, Mao Zedong, Saddam Hussein, and Muammar Qaddafi all used to gain life-and-death control over their countrymen and women. It is how Osama bin Laden and the leaders of the Islamic State hoped to gain such power. Though these men lived in different times and places, and came from vastly different backgrounds, many of them felt respect for each other. They often seemed to recognize their shared, “dark” personality traits and viewed them as strengths. Only in rare cases did they show signs of mental disorders. “Getting inside the heads” of foreign leaders and terrorists is one way governments try to understand, predict, and influence their actions. Psychological profiles can help us understand the urges of tyrants to dominate, subjugate, torture and slaughter. Tyrannical Minds reveals how recognizing their psychological traits can provide insight into the motivations and actions of dangerous leaders, potentially allow to us predict their behavior?and even how to stop them. As strongmen and authoritarian leaders around the world increase in number, understanding the most extreme examples of tyrannical behavior should serve as a warning to anyone indifferent to the threats posed by political extremism.

Tyrannosaurid Paleobiology (Life Of The Past Ser.)

by Philip J. Currie Ralph E. Molnar J. Michael Parrish Eva B. Koppelhus

The opening of an exhibit focused on "Jane," a beautifully preserved tyrannosaur collected by the Burpee Museum of Natural History, was the occasion for an international symposium on tyrannosaur paleobiology. This volume, drawn from the symposium, includes studies of the tyrannosaurids Chingkankousaurus fragilis and "Sir William" and the generic status of Nanotyrannus; theropod teeth, pedal proportions, brain size, and craniocervical function; soft tissue reconstruction, including that of "Jane"; paleopathology and tyrannosaurid claws; dating the "Jane" site; and tyrannosaur feeding and hunting strategies. Tyrannosaurid Paleobiology highlights the far ranging and vital state of current tyrannosaurid dinosaur research and discovery.

Tyranny from Ancient Greece to Renaissance France

by Orest Ranum

This Palgrave Pivot examines how prominent thinkers throughout history, from ancient Greece to sixteenth-century France, have perceived tyrants and tyranny. Ancient philosophers such as Plato and Aristotle were the first to build a vocabulary for tyrants and the forms of government they corrupted. Thirteenth century analyses of tyranny by Thomas Aquinas and John of Salisbury, revived from Antiquity, were recast as short observations about what tyrants do. They claimed that tyrants govern for their own advantage, not for the people. Tyrants could be usurpers, increase taxes, and live in luxury. The list of tyrannical actions grew over time, especially in periods of turmoil and civil war, often raising the question: When can a tyrant be legitimately deposed or killed? In offering a brief biography of these political philosophers, including Machiavelli, Erasmus, More, Bodin, and others, along with their views on tyrannical behavior, Orest Ranum reveals how the concept of tyranny has been shaped over time, and how it still persists in political thought to this day.

Tyranny of the Gene: Personalized Medicine and Its Threat to Public Health

by James Tabery

A revelatory account of how power, politics, and greed have placed the unfulfilled promise of personalized medicine at the center of American medicineThe United States is embarking on a medical revolution. Supporters of personalized, or precision, medicine—the tailoring of health care to our genomes—have promised to usher in a new era of miracle cures. Advocates of this gene-guided health-care practice foresee a future where skyrocketing costs can be curbed by customization and unjust disparities are vanquished by biomedical breakthroughs. Progress, however, has come slowly, and with a price too high for the average citizen.In Tyranny of the Gene, James Tabery exposes the origin story of personalized medicine—essentially a marketing idea dreamed up by pharmaceutical executives—and traces its path from the Human Genome Project to the present, revealing how politicians, influential federal scientists, biotech companies, and drug giants all rallied behind the genetic hype. The result is a medical revolution that privileges the few at the expense of health care that benefits us all.Now American health care, driven by the commercialization of biomedical research, is shifting focus away from the study of the social and environmental determinants of health, such as access to fresh and nutritious food, exposure to toxic chemicals, and stress caused by financial insecurity. Instead, it is increasingly investing in &“miracle pills&” for leukemia that would bankrupt most users, genetic studies of minoritized populations that ignore structural racism and walk dangerously close to eugenic conclusions, and oncology centers that advertise the perfect gene-drug match, igniting a patient&’s hope, and often dashing it later.Tyranny of the Gene sounds a warning cry about the current trajectory of health care and charts a path to a more equitable alternative.

Tyranny, Inc.: How Private Power Crushed American Liberty--and What to Do About It

by Sohrab Ahmari

The inside story of how our political class enabled an era of unaccountable corporate might that left ordinary Americans isolated and powerless—and how we can fight back—from the acclaimed author of The Unbroken Thread&“In Tyranny, Inc., Sohrab Ahmari, one of the leading thinkers of our time, alerts us to one of the greatest threats to freedom.&”—Michael Lind, author of The New Class War and Hell to PayOver the past two generations, U.S. leaders deregulated big business on the faith that it would yield a better economy and a freer society. But the opposite happened. Americans lost stable, well-paying jobs, Wall Street dominated industry to the detriment of the middle class and local communities, and corporations began to subject us to total surveillance, even dictating what we are, and aren&’t, allowed to think. The corporate titans and mega-donors who aligned themselves with this vision knew exactly what they were getting: perfect conditions for what Sohrab Ahmari calls &“private tyranny&”.Drawing on original reporting and a growing chorus of experts who are sounding the alarm, Ahmari chronicles how private tyranny has eroded America&’s productive economy and the liberties we take for granted—from employment agreements that gag whistleblowers, to Big Finance&’s takeover of local fire departments, to the rigging of corporate bankruptcy to deny justice to workers and consumers—illuminating how these and other developments have left millions feeling that our livelihoods are insecure. And he shows how ordinary Americans can fight back, by restoring the economic democracy that empowered and uplifted millions of working-class people in the twentieth century.Provocative, original, and cutting across partisan lines, Tyranny, Inc. is a revelatory read on the most important political story of our time.

U Can: Chemistry I For Dummies

by John T. Moore Peter J. Mikulecky Chris Hren

Now you can score higher in chemistry Every high school requires a course in chemistry for graduation, and many universities require the course for majors in medicine, engineering, biology, and various other sciences. U Can: Chemistry I For Dummies offers all the how-to content you need to enhance your classroom learning, simplify complicated topics, and deepen your understanding of often-intimidating course material. Plus, you'll find easy-to-follow examples and hundreds of practice problems--as well as access to 1,001 additional Chemistry I practice problems online! As more and more students enroll in chemistry courses,, the need for a trusted and accessible resource to aid in study has never been greater. That's where U Can: Chemistry I For Dummies comes in! If you're struggling in the classroom, this hands-on, friendly guide makes it easy to conquer chemistry. Simplifies basic chemistry principles Clearly explains the concepts of matter and energy, atoms and molecules, and acids and bases Helps you tackle problems you may face in your Chemistry I course Combines 'how-to' with 'try it' to form one perfect resource for chemistry students If you're confused by chemistry and want to increase your chances of scoring your very best at exam time, U Can: Chemistry I For Dummies shows you that you can!

U Can: Physics I For Dummies

by Steven Holzner Daniel Funch Wohns

Take the fear out of Physics I If the thought of studying physics makes you sweat, you can finally have something to rest easy about! U Can: Physics I For Dummies takes the intimidation out of this tough subject, offering approachable lessons, examples, and practice opportunities-as well as access to additional practice problems online. With this one-stop resource, you'll find friendly and accessible instruction on everything you'll encounter in your Physics I course and will gain the practice and confidence you need to score high at exam time. Inside this comprehensive study resource, how-to lessons are thoughtfully blended with practical examples and problems to help you put your knowledge to practice and gauge your comprehension of the physics topics presented. Lessons and practice problems are fully integrated and track to a typical Physics I course, giving you one mega-resource that combines the 'how-to' you need with the 'do it' practice you want to keep the physics anxiety at bay. Get up to speed on the basic concepts of physics Grasp physics formulas in a clear and concise manner Explore the newest discoveries in the field Access additional practice problems online If you're looking for an all-inclusive product to help with your Physics I coursework, U Can: Physics I For Dummies has it all-and then some!

U.S. Agriculture in a Global Setting: An Agenda for the Future (Routledge Revivals)

by M. Ann Tutwiler

The theme of the 1987/88 annual review of the National Center for Food and Agricultural Policy (NCFAP) specifically considers that while the world in which agricultural policy operates has changed dramatically over the decades, agricultural policies have not taken account of those changes in any fundamental way. Originally published in 1988, this volume examines the setting in which U.S. agriculture finds itself and suggests an agenda for future policy. This title is a valuable resource for policy makers and students interested in environmental studies, agricultural practices, and national policy.

U.S. Army Guerrilla Warfare Handbook

by Army

They can be swift, silent, and deadly. That's why armed guerrillas are feared by even the largest, best-equipped fighting forces. No tank, rocket-propelled grenade, or infantry battalion can match the guerrilla team's ability to exact brutality with precision, instill fear in enemy hearts, and viciously deflate morale. From the snows of Korea to the jungles of Southeast Asia to the mountains of Afghanistan, the U.S. Army has employed guerrilla tactics to deadly effect. Those tactics and techniques, being used today by U.S. soldiers, are laid out in the U.S. Army Guerrilla Warfare Handbook. Employing small, heavily-armed, and well-oiled fire teams, guerrilla warfare has played an invaluable role in the success of nearly every U.S. campaign for decades. Here, its methods are detailed: raids and ambushes, demolition, counterintelligence, mining and sniping, psychological warfare, communications, and much more. This is an inside look at the guerrilla strategies and weapons that have come to be feared by enemies and respected by allies. Not another outside perspective or commentary on unconventional warfare, this is the original--of use to soldiers in the field and to anyone with an interest in military tactics.

U.S. Army Guide to Military Mountaineering (US Army Survival)

by Army

Mountains exist in almost every country in the world and almost every war has included some type of mountain operations. This pattern will not change, and soldiers will continue to fight in mountainous terrain in future conflicts. Although mountain operations have not changed, several advancements in equipment and transportation have increased the soldiers' capabilities. The helicopter now allows access to terrain that was once unreachable or could be reached only by slow methodical climbing. Inclement weather, however, may place various restrictions on the capabilities of air assets available to a commander. The unit must then possess the necessary mountaineering skills to overcome adverse terrain to reach an objective.The U.S. Army Guide to Military Mountaineering details techniques soldiers and leaders must know to cope with mountainous terrain. These techniques are the foundation upon which the mountaineer must build. They must be applied to the various situations encountered to include river crossings, glaciers, snow-covered mountains, ice climbing, rock climbing, and urban vertical environments. The degree to which this training is applied must be varied to conform to known enemy doctrine, tactics, and actions. This guide also discusses basic and advanced techniques to include acclimatization, illness and injury, equipment, anchors, evacuation, movement on glaciers, and training.

U.S. Army Improvised Munitions Handbook: Explosives & Propellants, Mines & Grenades, Mortars & Rockets, Small Arms Weapons & Ammunition Fuses, Detonators, & Delay Mechanisms (US Army Survival)

by Army

You don’t need to be a trained soldier to fully appreciate this edition of the U.S. Army Improvised Munitions Handbook (TM 31-210). Originally created for soldiers in guerilla warfare situations, this handbook demonstrates the techniques for constructing weapons that are highly effective in the most harrowing of circumstances. Straightforward and incredibly user-friendly, it provides insightful information and step-by-step instructions on how to assemble weapons and explosives from common and readily available materials. Over 600 illustrations complement elaborate explanations of how to improvise any number of munitions from easily accessible resources. Whether you’re a highly trained solider or simply a civilian looking to be prepared, the U.S. Army Improvised Munitions Handbook is an invaluable addition to your library.

U.S. Army Intelligence and Interrogation Handbook: The Official Guide On Prisoner Interrogation (US Army Survival)

by Army

The U.S. Army Intelligence and Interrogation Handbook provides doctrinal guidance, techniques, and procedures governing the use of interrogators as human intelligence collection agents in support of a commander's intelligence needs. It outlines the interrogator's role within the greater intelligence effort as well as the unit's day-to-day operations, and includes details on how interrogators accomplish their assigned missions. This handbook is intended for use by interrogators as well as commanders, staff officers, and military intelligence personnel charged with conducting interrogations, and applies to operations at all levels of conflict intensity, including conditions involving the use of electronic warfare or nuclear, biological, or chemical weapons.The U.S. Army Intelligence and Interrogation Handbook builds upon existing doctrine and moves interrogation into the twenty-first century within the constraints of the Uniform Code of Military Justice and the Geneva Conventions. Principles, guidelines, and topics covered include:The definition of interrogationInterrogator capabilities and limitationsWarfighting doctrineThe intelligence cycle, and its disciplines and operationsAmphibious and airborne operationsThe interrogation processExploiting captured enemy documentsA tactical questioning guideAnd many more tactics and techniques used by the U.S. Army!

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Showing 80,876 through 80,900 of 85,171 results