Utility of Experimental Design in Automatic Target Recognition Performance Evaluation
This research investigates current practices in test and evaluation of classification algorithms, and recommends improvements. We scrutinize the evaluation of automatic target recognition algorithms and rationalize the potential for improvements in the accepted methodology. We propose improvements through the use of an experimental design approach to testing. We demonstrate the benefits of improvements by simulating algorithm performance data and using both methodologies to generate evaluation results. The simulated data is varied to test the sensitivity of the benefits to a broad set of outcomes.The opportunities for improvement are threefold. First, the current practice of "one-at-a-time" factor variation (only one factor is varied in each test condition) fails to capture the effect of multiple factors. Next, the coarse characterization of data misses the opportunity to reduce the estimate of noise in test through the observation of uncontrolled factors. Finally, the lack of advanced data reduction and analysis tools renders analysis and reporting tedious and inefficient. This research addresses these shortcomings and recommends specific remedies through factorial testing, detailed data characterization, and logistic regression. We show how these innovations improve the accuracy and efficiency of automatic target recognition performance evaluation.This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it. This work was reproduced from the original artifact, and remains as true to the original work as possible. Therefore, you will see the original copyright references, library stamps (as most of these works have been housed in our most important libraries around the world), and other notations in the work.This work is in the public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work.As a reproduction of a historical artifact, this work may contain missing or blurred pages, poor pictures, errant marks, etc. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.
Evolution in Military Affairs
The concept of using natural evolution as an analogy for how modern organizationscan adapt to a chaotic, rapidly changing world situation is currently in vogue in the business world. This paper will examine whether the chaotic evolutionary development model is pertinent to the US military's attempt to adapt to the uncertain national security environment of the post Cold War world. The paper will look at the historical example of the development of infrared (IR) systems for tactical aviation in order to see how the natural evolution model can be applied to the development of military systems. The evolutionary development of IR systems will be "benchmarked" against the more traditional planned development of radar systems. The theme of the paper is that the chaotic evolutionary development of IR systems has been successful and has had a significant effect on the current state of air operations. The general conclusion of the paper is that the natural evolution development model has many analogies to the way IR systems were developed and employed and contains many useful insights to consider for future development. Understanding this analogy and its limits may hold the key for developing a more flexible development system that will be better able to adapt to the uncertain security environment of the future. In the epilogue, the paper will address how such evolutionary development might be applied to the attempt to plan an information-based Revolution in Military Affairs.This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it. This work was reproduced from the original artifact, and remains as true to the original work as possible. Therefore, you will see the original copyright references, library stamps (as most of these works have been housed in our most important libraries around the world), and other notations in the work.This work is in the public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work.As a reproduction of a historical artifact, this work may contain missing or blurred pages, poor pictures, errant marks, etc. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.
Molecularly Imprinted Polymers for Environmental Monitoring
This multidisciplinary book provides a comprehensive overview of the fabrication and development of molecularly imprinted polymer-based devices for various sensing applications.
Elasticity of Materials
-It is a comprehensive resource that covers a range of topics related to elasticity, including theory, applications, and experimental techniques. -Provides an introductory chapter that covers analytical and numerical approaches used in engineering elasticity, making it a useful resource for students and professionals alike.-Offers a comprehensive overview of stress-strain analysis for elasticity equations, including the use of Hooke's Law, Young's Modulus, and Poisson's Ratio.-Covers the use of Finite Element Analysis (FEA) and experimental techniques for determining the applied elasticity problem, with a focus on fabricating aspheric surfaces.-Discusses the concept of phase transition based on elastic systematics, exploring how changes in temperature and pressure can cause materials to undergo a transition from elastic to a non-elastic state.-Describes the repair inspection technique based on elastic-wave tomography, providing valuable insights into non-destructive testing methods for detecting damage in concrete structures.-The book is well-suited for students, researchers, and professionals in engineering and materials science, as well as anyone interested in understanding the behavior of materials under stress and strain.
East Asia's Grand Strategies
An in-depth exploration of the strategic dynamics shaping East Asia's future on the world stageEast Asia is the epicenter of twenty-first-century geopolitics, where military, economic, and diplomatic strategies intersect in complex and often unpredictable ways. As the region becomes increasingly central to global power dynamics, understanding the strategies that drive the actions of powers there is more critical than ever.East Asia's Grand Strategies offers the first comparative analysis of the grand strategies of twelve East Asian powers and reveals how they shape their foreign policies, balancing external pressures with domestic political realities. In this edited volume, experts from the region provide non-Western perspectives and fresh insights into the unique factors influencing each case's grand strategy. The chapters illuminate patterns that are critical for understanding East Asia's role in global politics today.Scholars, students, and policymakers interested in East Asia's international relations and the evolving dynamics of its grand strategy will be interested in this timely analysis of the strategic forces shaping the region and, by extension, the future of global power.
Thin Films - Fundamentals, Deposition Techniques and Applications
Thin films are key components of modern technology. Ranging from a few nanometers to several micrometers in thickness and composed of a wide variety of materials, they play a crucial role in numerous applications. Their unique properties, related to the exciting physical phenomena that emerge in many materials when dimensions are reduced, make them a subject of intense research across various fields. This volume brings together contributions from experts in materials science and engineering, serving as a valuable resource for scientists, engineers, and students seeking to expand their knowledge of thin film fabrication and its practical applications. It is intended to serve as a helpful reference for both students and professionals seeking clear and detailed information on the fundamentals, technologies, and applications of thin films.
Surface Engineering - Foundational Concepts, Techniques and Applications
Surface Engineering - Foundational Concepts, Techniques and Applications provides a cutting-edge exploration of advanced surface modification technologies and their critical role in enhancing material performance across industries. As industrial demands grow for components that can withstand extreme conditions, such as high temperatures, corrosive environments, and heavy wear, surface engineering emerges as a vital solution to improve durability, efficiency, and sustainability. This book explores key methods, including laser surface treatment, plasma modification, and ion implantation, while addressing real-world challenges in the aerospace, automotive, energy, and manufacturing sectors. Bridging theory and practice, it offers insights into friction reduction, corrosion protection, and hybrid material joining, equipping researchers and engineers with actionable strategies to extend component lifespans and optimize industrial processes. A must-read for professionals in materials science, mechanical engineering, and tribology, this volume combines foundational knowledge with innovative applications, making it an essential reference for advancing surface technology in modern industry.
Composite Materials - Science and Engineering
Composite materials are essential for modern engineering, offering an optimal balance between lightweight properties, mechanical strength, and performance under extreme conditions. This book provides a clear and well-documented overview of these advanced materials, covering both theoretical aspects and practical applications. A wide range of composite types is presented, including thermoplastics and thermosets, as well as innovative materials such as shape-memory composites and highly deformable materials. Modern methods of structural testing and analysis, such as finite element simulation and non-destructive techniques, are also included. Aimed at researchers, engineers, and students, this book is a valuable resource for anyone seeking to understand the role of composites in future technologies.
Cellulose - Biobased Solutions for Society
The use and recovery of lignocellulosic waste generated in the agri-food industry must constitute a pillar on which to advance in the sustainable development of society, enabling the replacement of linear economic models with circular bioeconomy models.
Nanobiosensors for Crop Monitoring and Precision Agriculture
Nanobiotechnology has been intensively investigated for decades and is thus well-recognized as a promising approach for advancing sustainable agriculture, particularly proving precision and smart tools based on engineered nanoparticles/nanomaterials. Among them, nanosensors and nanobiosensors have the potential to revolutionize agricultural practices by sensing, detecting, and monitoring cellular processes such as signal transduction and plant hormone dynamics, crop performances, and soil/environmental conditions for precision and even real-time management of fertilizers, pesticides, plant growth/yield/quality, stress responses, and post-harvest processes. In the international book market, there is a gap in providing an updated comprehensive book resource for readers who are interested in materials science and nano-biotechnology particularly, the detailed part of nano-biosensors for agri-food applications. Therefore, this book bridges the knowledge gap by providing a complete guide to nano-biosensors from their fundamentals to current agricultural applications, which presents a series of review-type chapters organized by diverse experts. This book consists of 14 chapters, including subtopics such as optical nanobiosensors, calorimetric nanobiosensors, immuno-nanobiosensors, enzymatic nanobiosensors, and apta-nanobiosensors, for their synthesis, action, and applications. This book provides an updated overview of ethical considerations and regulations for nanotechnology in agri-food applications.
Black Silicon
The ability to tailor the morphology of semiconductors in order to obtain the desired properties will add new dimension to the fundamental physics, materials science and engineering of these materials for a variety of applications. Due to its high absorptance, Black Silicon presents new opportunities for applications in energy, healthcare and thermal management.
Recent Progress and Development in Nanostructures
Recent Progress and Development in Nanostructures is a comprehensive exploration of the latest advancements in the rapidly evolving field of nanotechnology. This book investigates nanostructure synthesis, characterization, and applications, showcasing their transformative potential in energy, environment, healthcare, and beyond. With contributions from leading experts, the book highlights the crucial role of nanostructures in addressing global challenges. Topics include innovative synthesis methods, advanced characterization techniques, and emerging applications in catalysis, sensors, drug delivery, and energy storage systems. It also explores hybrid nanostructures, self-assembled materials, and the integration of nanotechnology into sustainable and green solutions. Tailored for researchers, professionals, and students, the book balances theoretical insights and practical applications. Each chapter provides a detailed discussion of recent breakthroughs, supported by in-depth analysis and experimental findings. Special emphasis is placed on interdisciplinary approaches that bridge chemistry, physics, and material science, underscoring the collaborative nature of modern nanotechnology research. The book also addresses the challenges in scalability, cost-effectiveness, and environmental impact associated with nanostructures, offering solutions and future directions. With an engaging narrative and illustrative content, Recent Progress and Development in Nanostructures is an invaluable resource for advancing knowledge and fostering innovation in this dynamic field. Whether you are an academic, industry professional, or enthusiast, this book will inspire and guide your journey into the fascinating world of nanostructures.
Advanced Nanomaterials in Biomedical Implants: Processing, Structures, Properties And, Applications
Advanced Materials in Bioimplants: Processing and Applications thoroughly reviews the core concepts, processing routes, and applications of nanomaterials in bioimplants. Divided into three sections, this book systematically guides the reader through each stage of bioimplant materials development, helping them make informed decisions when selecting appropriate materials for their work. A range of implant nanomaterials is considered including smart, piezoelectric, magnetostrictive, and light nanomaterials. Various fabrication and synthesis techniques are detailed, as well as key applications as antiviral smart nanocoatings, loadbearing, flexible, wear-resistant nanomaterials, and futuristic bioimplants. This book acts as a reference to the researchers and practitioners in the fields of nanotechnology, biomedical engineering, and biosciences.
Data Science in Metal Forming
Data Science in Metal Forming provides readers with a framework to collect, visualize, analyze, and characterize metal forming metadata, thus enabling improved design, more efficient production, and more effective application of a range of metals. Chapters introduce concepts and discuss industry 4.0, digital manufacturing, and more. Other sections feature case studies of metal forming data collection spanning several essential procedures and outline methods for data processing when lacking essential information. The book also includes data visualization techniques, insights into how to analyze data from various metal forming processes (stamping, hydroforming, incremental, extrusion, and more) and details on how readers can setup, manage, and most effectively apply their own data repositories.
Treatise on Process Metallurgy, Volume 2b
Treatise on Process Metallurgy, Volume 2B: Unit Processes, presents various unit processes with an emphasis on mineral processing, hydrometallurgy, and electrochemical materials and energy processes. The book highlights the roles of these processes in beneficiation, rare-earth extraction, utilization of lean resources, coal extraction, and biofuels, reflecting the shift toward green and electrochemical processes. Basic knowledge of thermodynamics and kinetics is provided for better understanding of metallurgical processes. The first section of the book covers mineral processing, providing insight on comminution, separation processes, dewatering, and tailings disposal. The second section focuses on hydrometallurgy, discussing leaching, separation-purification, metal recovery, and battery materials, and the book concludes with a section studying electrochemical material and energy, featuring coverage of molten oxide electrolysis, molten carbonate fuel cells, various sensors, and ionic liquids. Each section also includes various case studies, demonstrating the use of the concepts in real-world settings.
Hydrogel Tissue Analogues
Hydrogel Tissue Analogues provides an overview of the critical role of novel hydrogels in tissue engineering and biomedicine. Structured into three parts, this book guides readers through the latest advances in hydrogel technology. Part one offers an in-depth look at state-of-the-art hydrogel processing, including biomimetic strategies and ground-breaking bioprinting approaches. It also covers rheological characterization and its biomedical applications. Part two showcases the diverse applications of hydrogels in tissue regeneration, spanning bone, adipose, cartilage, cardiac, intervertebral disc, and skin tissues. Additionally, it explores hydrogels for hemostasis, vascularization enhancement, and infectious disease treatment, along with their bioadhesive properties. Part three delves into the regulatory aspects surrounding hydrogel products, addressing emerging developments and commercially available solutions. Hydrogel Tissue Analogues is an essential resource for researchers and academics in the fields of materials science, biomaterials, polymer science, and regenerative medicine, who have an interest in hydrogel-based biomedical solutions.
Immunomodulatory Biomaterials and Nano-Immunotherapies
Immunomodulatory Biomaterials and Nano-immunotherapies reviews the general cellular and biochemical barriers of the tumor microenvironment and other immune diseases, the ways they are addressed by modern immunotherapies, and the specific barriers facing particular immunotherapeutic approaches. The latest research on immunomodulatory biomaterials is examined, providing a perspective on their future opportunities in modulating disease treatment strategies. Translational considerations and lessons learned from the various components of nanotechnology-enabled immunotherapies, including conventional immunotherapies, nucleic acids, nanotechnology, and biotechnology-based therapeutics are assessed. Finally, a framework for the development of the next generation of nanotechnology-enabled immunotherapies is detailed, providing guidance and suggestions for those interested in the development of novel immunomodulatory nanobiomaterials. Immunomodulatory Biomaterials and Nano-immunotherapies is a key reference for researchers and developers working in biomaterials, nanotechnology, immunology, biomedical engineering and pharmaceutical sciences.
Improving the Estimation of the Military Worth of the Advanced Tactical Laser Through Simulation Aggregation
Fielding High Energy Laser (HEL) weapon systems presents technological challenges as well as employment and financial challenges. The risk associated with the challenges mandates the development process include computer simulation models capable of predicting weapon system performance from the engineering level to assessing the military worth of employing HEL systems in combat scenarios. This research effort focuses on developing laser performance data at a higher fidelity engagement model and integrating the performance data into a mission level model. The propagation of the laser from the transmitting aperture to the target is modeled at the engagement level through the employment of the High Energy Laser End-to-End Operational Simulation (HELEEOS), developed by the AFIT Center for Directed Energy (CDE).This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it. This work was reproduced from the original artifact, and remains as true to the original work as possible. Therefore, you will see the original copyright references, library stamps (as most of these works have been housed in our most important libraries around the world), and other notations in the work.This work is in the public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work.As a reproduction of a historical artifact, this work may contain missing or blurred pages, poor pictures, errant marks, etc. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.
Unmanned Combat Aerial Vehicles
With the success of Unmanned Aerial Vehicles (UAV) in Operations Allied Force, Enduring Freedom, and Iraqi Freedom, many in Congress and DoD are pushing to put more UAV capability on the battlefield of tomorrow. More importantly, the desire is to have these UAVs shift from reconnaissance to offensive combat platforms commonly referred to as UCAVs (Unmanned Combat Aerial Vehicles). UCAV's first mission is Suppression of Enemy Air Defenses (SEAD) and its complementary mission of Electronic Warfare (EW) sometimes referred to as jamming. Early support for these particular missions can be traced to a couple of factors. The first is the need to supplement and eventually replace the current Low Density/High Demand (LD/HD) manned systems such as the F-16CJ for SEAD and the EA-6B for EW. While these assets are limited in quantity, they are also artificially limited in employment capability due to concern for the aircrew in the dangerous environment in which they are forced to operate. This paper investigates the UCAV alternatives, to include sensor and weapon technology, and then recommends a course of action. The challenges of making a UCAV that can do the same job as a manned aircraft cheaper and more effectively will be the key drivers in deciding whether this is the right direction.This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it. This work was reproduced from the original artifact, and remains as true to the original work as possible. Therefore, you will see the original copyright references, library stamps (as most of these works have been housed in our most important libraries around the world), and other notations in the work.This work is in the public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work.As a reproduction of a historical artifact, this work may contain missing or blurred pages, poor pictures, errant marks, etc. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.
Employment of Unmanned Aircraft Systems for Canadian Forces Anti-Submarine Warfare
Fixed-wing Unmanned Aircraft Systems (UAS) technology has experienced exponential growth over the past 10-15 years and is now employed as an intelligence, surveillance, and reconnaissance (ISR) asset by virtually every modern military force in the world, as well as by civil law enforcement agencies. Currently, more than 30 nations are developing or manufacturing more than 250 models of UAS. Substantial commercial market growth and competition in fixed wing UAS platforms for military and law enforcement applications resulted in a wide variety of UAS platforms from small, hand-launched aircraft that operate at low altitudes for short-duration, to large, complex turbo-prop and jet powered aircraft capable of long-endurance operations at medium and high altitudes. Employment of Medium-Altitude, Long-Endurance (MALE) and High-Altitude, Long Endurance (HALE) UAS in the anti-submarine warfare (ASW) role is rapidly becoming feasible through emerging technologies and expanded payload capacities, the most significant of which are secure high-bandwidth Beyond Line of Sight (BLOS) satellite datalink communications, miniature light-weight sonobuoys, and real-time shore-based acoustic processing. As a result, UAS may be a technically feasible future Canadian Forces (CF) ASW capability as a complementary or stand-alone alternative to manned fixed-wing and rotary-wing maritime ASW platforms.This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it. This work was reproduced from the original artifact, and remains as true to the original work as possible. Therefore, you will see the original copyright references, library stamps (as most of these works have been housed in our most important libraries around the world), and other notations in the work.This work is in the public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work.As a reproduction of a historical artifact, this work may contain missing or blurred pages, poor pictures, errant marks, etc. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.
TM 5-698-4
The United States Army Publishing Directorate is the Army's leader in publishing and delivering informational products worldwide. Their main mission is to supply official authenticated information to enhance the readiness of the total force. Some product topics include: Army Regulations, Engineering Technical Manuals, Administrative Publications, Circulars and Pamphlets. This is one of their documents.This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it. This work was reproduced from the original artifact, and remains as true to the original work as possible. Therefore, you will see the original copyright references, library stamps (as most of these works have been housed in our most important libraries around the world), and other notations in the work.This work is in the public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work.As a reproduction of a historical artifact, this work may contain missing or blurred pages, poor pictures, errant marks, etc. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.
An Analysis of the Potential for Using Over-The-Horizon Radar Systems for Space Surveillance
The Australian Defence Force is investigating the development of a space surveillance system. While several dedicated facilities for space surveillance are in operation around the world, Australia's Over-The-Horizon Radar (OTHR) network has some potential for this role. The OTHR operates in the HF band and is constrained by the propagation effects of the ionosphere. A spherically stratified ionospheric model and a model for a nominal OTHR antenna are developed that allow calculation of path propagation, power distribution, and clutter returns. A software-based radar receiver processing system is modeled to determine detection probabilities and the minimum detectable radar cross-section of targets in typical low earth orbit (LEO) trajectories. The high clutter power levels, coupled with long target ranges and high velocities, mean that range-Doppler tradeoffs have a great impact on the resulting detection capabilities. While the system as modeled has the potential to provide some coverage for LEO targets, operational constraints mean the necessary conditions for detection of space targets would rarely be met while the system is involved in traditional OTHR tasking. Further, the long wavelengths and large antenna beams mean the accuracy of any positioning information is low.This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it. This work was reproduced from the original artifact, and remains as true to the original work as possible. Therefore, you will see the original copyright references, library stamps (as most of these works have been housed in our most important libraries around the world), and other notations in the work.This work is in the public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work.As a reproduction of a historical artifact, this work may contain missing or blurred pages, poor pictures, errant marks, etc. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.
Non-Cooperative Detection of Frequency-Hopped GMSK Signals
Many current and emerging communication signals use Gaussian Minimum Shift Keyed (GMSK), Frequency-Hopped (FH) waveforms to reduce adjacent-channel interference while maintaining Low Probability of Intercept (LPI) characteristics. These waveforms appear in both military (Tactical Targeting Networking Technology, or TTNT) and civilian (Bluetooth) applications. This research develops wideband and channelized radiometer intercept receiver models to detect a GMSK-FH signal under a variety of conditions in a tactical communications environment. The signal of interest (SOI) and receivers have both fixed and variable parameters.This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it. This work was reproduced from the original artifact, and remains as true to the original work as possible. Therefore, you will see the original copyright references, library stamps (as most of these works have been housed in our most important libraries around the world), and other notations in the work.This work is in the public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work.As a reproduction of a historical artifact, this work may contain missing or blurred pages, poor pictures, errant marks, etc. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.
Put the Joint Back in the Joint Strike Fighter
Short Takeoff Vertical Land (STOVL) technology existed for high-performance aircraft since the late 1960s, but the United States Air Force (USAF) elected not to acquire a STOVL fighter despite the United States Marine Corp (USMC) and coalition partners such as Great Britain and Italy investing in such fighters. The former Chief of Staff of the Air Force (CSAF) stated the USAF is interested in acquiring a STOVL variant (designated as the F-35B) of the Joint Strike Fighter (JSF) in addition to the F-35A, the USAF JSF variant.1 To date, the current CSAF has not reversed this decision but this may be due to the absence of a study that clearly states the advantages and disadvantages of the F-35B for the USAF. The USAF still needs a research project to examine this subject and clearly state the pros and cons.This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it. This work was reproduced from the original artifact, and remains as true to the original work as possible. Therefore, you will see the original copyright references, library stamps (as most of these works have been housed in our most important libraries around the world), and other notations in the work.This work is in the public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work.As a reproduction of a historical artifact, this work may contain missing or blurred pages, poor pictures, errant marks, etc. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.
Fuels and Fuel Additives for Highway Vehicles and Their Combustion Products
The U.S. Environmental Protection Agency (EPA) was introduced on December 2, 1970 by President Richard Nixon. The agency is charged with protecting human health and the environment, by writing and enforcing regulations based on laws passed by Congress. The EPA's struggle to protect health and the environment is seen through each of its official publications. These publications outline new policies, detail problems with enforcing laws, document the need for new legislation, and describe new tactics to use to solve these issues. This collection of publications ranges from historic documents to reports released in the new millennium, and features works like: Bicycle for a Better Environment, Health Effects of Increasing Sulfur Oxides Emissions Draft, and Women and Environmental Health.This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it. This work was reproduced from the original artifact, and remains as true to the original work as possible. Therefore, you will see the original copyright references, library stamps (as most of these works have been housed in our most important libraries around the world), and other notations in the work.This work is in the public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work.As a reproduction of a historical artifact, this work may contain missing or blurred pages, poor pictures, errant marks, etc. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.
Uninhabited Combat Aerial Vehicles
When US Air Force Capt Scott O'Grady's F-16 was shot down over Bosnia in June 1995, Americans watched anxiously as aircraft and helicopters searched for the missing pilot. When O'Grady was retrieved safely from a Balkan forest, television networks cut to special bulletins.Two months later, an Air Force reconnaissance aircraft also crashed in hostile territory. No attempt to search for the crew was made. The incident rated two lines near the back of most newspapers. Rather than dodging Serbs and eating bugs to survive comfortably, the operators of the Predator unmanned airplane were sitting in an air-conditioned shelter at the USAF's base at Aviano, Italy.-Bill SweetmanPopular Science Bill Sweetman's description of Capt Scott O'Grady's rescue highlights the fact that today's United States (US) military leaders must be sensitive to political and social pressures to keep friendly casualties to a minimum. The loss of a single airman can have a tremendous effect on an entire military operation. Leaders must also contend with shrinking force structures and decreasing military budgets, while the US armed forces remain engaged around the world and across the conflict spectrum. They must find ways to "do more with less." These realities, which are unlikely to change in the foreseeable future, are forcing military leaders to seek new ways to carry on with the business of the United States; and the unmanned aerial vehicle (UAV) is a possible solution to this dilemma.This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it. This work was reproduced from the original artifact, and remains as true to the original work as possible. Therefore, you will see the original copyright references, library stamps (as most of these works have been housed in our most important libraries around the world), and other notations in the work.This work is in the public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work.As a reproduction of a historical artifact, this work may contain missing or blurred pages, poor pictures, errant marks, etc. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.
Determination of Yield and Flow Surfaces for Inconel 718 Under Axial-Torsional Loading at Temperatures Up to 649 C
An experimental program to determine flow surfaces has been established and implemented for solution annealed and aged IN718. The procedure involved subjecting tubular specimens to various ratios of axial-torsional stress at temperatures between 23 and 649 C and measuring strain with a biaxial extensometer. Each stress probe corresponds to a different direction in stress space, and unloading occurs when a 30 microstrain (1 micro eplison = 10(exp -6) mm/mm) offset is detected. This technique was used to map out yield loci in axial-torsional stress space. Flow surfaces were determined by post-processing the experimental data to determine the inelastic strain rate components. Surfaces of constant inelastic strain rate (SCISRS) and surfaces of constant inelastic power (SCIPS) were mapped out in the axial-shear stress plane. The von Mises yield criterion appeared to closely fit the initial loci for solutioned IN718 at 23 C. However, the initial loci for solutioned IN718 at 371 and 454 C, and all of the initial loci for aged IN718 were offset in the compression direction. Subsequent loci showed translation, distortion, and for the case of solutioned IN718, a slight cross effect. Aged IN718 showed significantly more hardening behavior than solutioned IN718.This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it. This work was reproduced from the original artifact, and remains as true to the original work as possible. Therefore, you will see the original copyright references, library stamps (as most of these works have been housed in our most important libraries around the world), and other notations in the work.This work is in the public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work.As a reproduction of a historical artifact, this work may contain missing or blurred pages, poor pictures, errant marks, etc. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.
High Temperature Degradation Mechanisms in Polymer Matrix Composites
Polymer matrix composites are increasingly used in demanding structural applications in which they may be exposed to harsh environments. The durability of such materials is a major concern, potentially limiting both the integrity of the structures and their useful lifetimes. The goal of the current investigation is to develop a mechanism-based model of the chemical degradation which occurs, such that given the external chemical environment and temperatures throughout the laminate, laminate geometry, and ply and/or constituent material properties, we can calculate the concentration of diffusing substances and extent of chemical degradation as functions of time and position throughout the laminate. This objective is met through the development and use of analytical models, coupled to an analysis-driven experimental program which offers both quantitative and qualitative information on the degradation mechanism. Preliminary analyses using a coupled diffusion/reaction model are used to gain insight into the physics of the degradation mechanisms and to identify crucial material parameters. An experimental program is defined based on the results of the preliminary analysis which allows the determination of the necessary material coefficients. Thermogravimetric analyses are carried out in nitrogen, air, and oxygen to provide quantitative information on thermal and oxidative reactions. Powdered samples are used to eliminate diffusion effects. Tests in both inert and oxidative environments allow the separation of thermal and oxidative contributions to specimen mass loss. The concentration dependency of the oxidative reactions is determined from the tests in pure oxygen. Short term isothermal tests at different temperatures are carried out on neat resin and unidirectional macroscopic specimens to identify diffusion effects. Mass loss, specimen shrinkage, the formation of degraded surface layers and surface cracking are recorded as functions of exposure time.This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it. This work was reproduced from the original artifact, and remains as true to the original work as possible. Therefore, you will see the original copyright references, library stamps (as most of these works have been housed in our most important libraries around the world), and other notations in the work.This work is in the public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work.As a reproduction of a historical artifact, this work may contain missing or blurred pages, poor pictures, errant marks, etc. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.
Tension-Compression Fatigue of Hi-Nicalon/SiC Ceramic Matrix Composite at 1200 C in Air and Steam
The tension-compression fatigue of a Hi-Nicalon /Silicon Carbide ceramic matrix composite (CMC) was studied at 1200?簞C in laboratory air and in steam environment. The CMC investigated in this effort consisted of an oxidation inhibited HyprSiC matrix reinforced with laminated woven Hi-Nicalon fibers. Fiber preforms had pyrolytic carbon fiber coating with boron carbide overlay applied were then densified with the HyprSiC oxidation inhibited matrix through chemical vapor infiltration (CVI). The tensile stressstrain behavior was evaluated and the tensile properties measured at 1200?簞C. Tension-compression fatigue tests were conducted at a frequency of 1.0 Hz with a ratio of minimum stress to maximum stress of R = -1.0. Tension-compression fatigue behavior was studied for fatigue stresses ranging from 80 to 300 MPa in air and in steam. Fatigue run-out was defined as 2x10璽 繕 cycles. Fatigue limit (based on a run-out condition of 2x10璽 繕 cycles) was 80 MPa in air and in steam. The presence of steam decreased the fatigue life of specimens tested above the fatigue limit. Specimens that achieved fatigue run-out were subjected to tensile tests to failure to characterize the retained tensile properties. The material retained 100% of its tensile strength. Reduction in tensile modulus was 68% while the change in compressive modulus was negligible.This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it. This work was reproduced from the original artifact, and remains as true to the original work as possible. Therefore, you will see the original copyright references, library stamps (as most of these works have been housed in our most important libraries around the world), and other notations in the work.This work is in the public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work.As a reproduction of a historical artifact, this work may contain missing or blurred pages, poor pictures, errant marks, etc. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.
Investigation Into Nanocomposites for Applications in Lightning Strike Protection
Aircraft manufacturers are currently looking to use composite materials for aircraft wing skins. Nonconductive composite materials offer little protection against lightning strikes. Conductive nanocomposites are being developed for lightning strike protection. This thesis explores a variety of composites including nickel coated carbon fabric (NiCCF) alone as lightning strike protection and with additional protection systems: nickel-nanostrand veil (NiNS), aligned buckypaper (ABP), non-aligned or random buckypaper (RBP), and a mixed buckypaper (MBP) made up of vapor grown carbon fibers (VGCF) and single walled nanotubes (SWNT). Each of the systems are tested under monotonic compression for ultimate compressive strength as well as compressive fatigue loading conditions before and after a simulated lightning strike. Their behaviors are compared to determine which system provides the best lightning strike protection. Overall results of testing conclude that RBP lends a 20% increase in effectiveness to lightning strike protection over the NiCCF only. NINS decreases effectiveness of lightning strike protection by 20%. Other systems tested showed effectiveness between these two cases. The most common failure in specimens after strike is delamination along the longitudinal fibers of the NiCCF and is thus deemed the weakest point of all systems which should be mitigated in future systems to improve effectiveness.This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it. This work was reproduced from the original artifact, and remains as true to the original work as possible. Therefore, you will see the original copyright references, library stamps (as most of these works have been housed in our most important libraries around the world), and other notations in the work.This work is in the public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work.As a reproduction of a historical artifact, this work may contain missing or blurred pages, poor pictures, errant marks, etc. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.
Structure-Property Relationships of Bismaleimides
The purpose of this research was to control and systematically vary the network topology of bismaleimides through cure temperature and chemistry (addition of various coreactants) and subsequently attempt to determine structure-mechanical property relationships. Characterization of the bismaleimide structures by dielectric, rheological, and thermal analyses, and density measurements was subsequently correlated with mechanical properties such as modulus, yield strength, fracture energy, and stress relaxation. The model material used in this investigation was 4,4'-BismaleiMidodIphenyl methane (BMI). BMI was coreacted with either 4,4'-Methylene Dianiline (MDA), o, o'-diallyl bisphenol A (DABA) from Ciba Geigy, or Diamino Diphenyl Sulfone (DDS). Three cure paths were employed: a low- temperature cure of 140 C where chain extension should predominate, a high-temperature cure of 220 C where both chain extension and crosslinking should occur simultaneously, and a low-temperature (140 C) cure followed immediately by a high-temperature (220 C) cure where the chain extension reaction or amine addition precedes BMI homopolymerization or crosslinking. Samples of cured and postcured PMR-15 were also tested to determine the effects of postcuring on the mechanical properties. The low-temperature cure condition of BMI/MDA exhibited the highest modulus values for a given mole fraction of BMI with the modulus decreasing with decreasing concentration of BMI. The higher elastic modulus is the result of steric hindrance by unreacted BMI molecules in the glassy state. The moduli values for the high- and low/high-temperature cure conditions of BMI/MDA decreased as the amount of diamine increased. All the moduli values mimic the yield strength and density trends. For the high-temperature cure condition, the room- temperature modulus remained constant with decreasing mole fraction of BMT for the BMI/DABA and BMI/DDS systems. Postcuring PMR-15 increases the modulus over that of the cured mateThis work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it. This work was reproduced from the original artifact, and remains as true to the original work as possible. Therefore, you will see the original copyright references, library stamps (as most of these works have been housed in our most important libraries around the world), and other notations in the work.This work is in the public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work.As a reproduction of a historical artifact, this work may contain missing or blurred pages, poor pictures, errant marks, etc. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.
Nanotechnology Weapons
Innovations from nanotechnology are starting to make their way into products on the commercial market as well as information and combat systems for the military. Improvements brought about by nanotechnology will be revolutionary, but, nanotechnology will also present entirely new threats. Steps must be taken now to address the asymmetrical menace posed by future nanotechnology weapons. Production rates of nanomaterials are also rising dramatically, yet there is a general lack of agreement and understanding about their dangers. Sometime within the next 5-10 years, development of a new type of chemical or biological weapon based on discoveries in nanotechnology could be a very real possibility, yet the Department of Defense (DOD) has not initiated programs to focus specifically on understanding or preventing this new type of threat. The DOD should take action now to solve the unknowns as it relates to the dangers of nanostructures, raise awareness on the dangers of nanotechnology within US research institutions and internationally alike, and introduce nanotechnology weapons into DOD educational environments and strategic planning.This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it. This work was reproduced from the original artifact, and remains as true to the original work as possible. Therefore, you will see the original copyright references, library stamps (as most of these works have been housed in our most important libraries around the world), and other notations in the work.This work is in the public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work.As a reproduction of a historical artifact, this work may contain missing or blurred pages, poor pictures, errant marks, etc. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.
Exploitation of Self Organization in UAV Swarms for Optimization in Combat Environments
This investigation focuses primarily on the development of effective target engagement for unmanned aerial vehicle (UAV) swarms using autonomous selforganized cooperative control. This development required the design of a new abstract UAV swarm control model which flows from an abstract Markov structure, a Partially Observable Markov Decision Process. Self-organization features, bio-inspired attack concepts, evolutionary computation (multi-objective genetic algorithms, differential evolution), and feedback from environmental awareness are instantiated within this model. The associated decomposition technique focuses on the iterative deconstruction of the problem domain state and dynamically building-up of self organizational rules as related to the problem domain environment. Resulting emergent behaviors provide the appropriate but different dynamic activity of each UAV agent for statistically accomplishing the required multi-agent temporal attack task. The current application implementing this architecture involves both UAV flight formation behaviors and UAVs attacking targets in hostile environments. This temporal application has been quite successful in computational simulation (animation) with supporting statistical analysis.This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it. This work was reproduced from the original artifact, and remains as true to the original work as possible. Therefore, you will see the original copyright references, library stamps (as most of these works have been housed in our most important libraries around the world), and other notations in the work.This work is in the public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work.As a reproduction of a historical artifact, this work may contain missing or blurred pages, poor pictures, errant marks, etc. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.
How Lumber is Graded
"How Lumber is Graded," Volume 64, by Harold S. Betts, offers a detailed exploration of the processes and standards involved in evaluating lumber quality. Originally published in 1920, this book provides valuable insights into the historical practices of the timber industry and the criteria used to classify lumber for various applications. It is an essential resource for anyone interested in forestry, woodworking, construction, or the history of material sciences. This volume details the specific characteristics considered when grading lumber, offering both historical context and practical knowledge for professionals and enthusiasts alike.This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it. This work was reproduced from the original artifact, and remains as true to the original work as possible. Therefore, you will see the original copyright references, library stamps (as most of these works have been housed in our most important libraries around the world), and other notations in the work.This work is in the public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work.As a reproduction of a historical artifact, this work may contain missing or blurred pages, poor pictures, errant marks, etc. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.
Pottery
Explore the intricate world of ceramics with Arthur Beckwith's "Pottery: Observations on the Materials and Manufacture of Terra-cotta, Stone-ware, Fire-brick, Porcelain, Earthen-ware, Brick, Majolica, and Encaustic Tiles With Remarks on the Products Exhibited." Originally published in 1872, this comprehensive study delves into the materials and manufacturing processes behind a wide array of ceramic products.Beckwith provides detailed insights into the composition, creation, and uses of terra-cotta, stoneware, fire-brick, porcelain, earthenware, brick, majolica, and encaustic tiles. This volume also features remarks on products exhibited at the London International Exhibition of 1871, offering a glimpse into the state of ceramic arts during the late 19th century. Perfect for collectors, historians, and anyone with an interest in the history of industrial arts, "Pottery" remains a valuable resource for understanding the enduring appeal and technical sophistication of ceramic production.This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it. This work was reproduced from the original artifact, and remains as true to the original work as possible. Therefore, you will see the original copyright references, library stamps (as most of these works have been housed in our most important libraries around the world), and other notations in the work.This work is in the public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work.As a reproduction of a historical artifact, this work may contain missing or blurred pages, poor pictures, errant marks, etc. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.
Thermomechanical Response of Shape Memory Alloy Hybrid Composites
This study examines the use of embedded shape memory alloy (SMA) actuators for adaptive control of the thermomechanical response of composite structures. A nonlinear thermomechanical model is presented for analyzing shape memory alloy hybrid composite (SMAHC) structures exposed to steady-state thermal and dynamic mechanical loads. Also presented are (1) fabrication procedures for SMAHC specimens, (2) characterization of the constituent materials for model quantification, (3) development of the test apparatus for conducting static and dynamic experiments on specimens with and without SMA, (4) discussion of the experimental results, and (5) validation of the analytical and numerical tools developed in the study. Excellent agreement is achieved between the predicted and measured SAMHC responses including thermal buckling, thermal post-buckling and dynamic response due to inertial loading. The validated model and thermomechanical analysis tools are used to demonstrate a variety of static and dynamic response behaviors including control of static (thermal buckling and post-buckling) and dynamic responses (vibration, sonic fatigue, and acoustic transmission). and SMAHC design considerations for these applications. SMAHCs are shown to have significant advantages over conventional response abatement approaches for vibration, sonic fatigue, and noise control.This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it. This work was reproduced from the original artifact, and remains as true to the original work as possible. Therefore, you will see the original copyright references, library stamps (as most of these works have been housed in our most important libraries around the world), and other notations in the work.This work is in the public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work.As a reproduction of a historical artifact, this work may contain missing or blurred pages, poor pictures, errant marks, etc. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.
Waterwise Landscaping Best Practices Manual
The Colorado State Publications Library (CoSPL) was established by the General Assembly in 1980 as a part of the Colorado State Library and the Colorado Department of Education. The mission of the library is to provide Colorado residents with permanent public access to information produced by state government. The state publications are valuable sources of information published by Colorado state agencies that include annual reports, budgets, planning reports, consumer information, legislative reports and directories. The publications cover a wide variety of topics including health, business, education, crime, agriculture, mining, employment, taxes, water quality, wildlife and the environment. This publication is one in this collection.This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it. This work was reproduced from the original artifact, and remains as true to the original work as possible. Therefore, you will see the original copyright references, library stamps (as most of these works have been housed in our most important libraries around the world), and other notations in the work.This work is in the public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work.As a reproduction of a historical artifact, this work may contain missing or blurred pages, poor pictures, errant marks, etc. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.
Microhardness and Strain Field Characterization of Self-Reacting Friction Stir and Plug Welds of Dissimilar Aluminum Alloys
Friction stir welding (FSW) is a solid state welding process with potential advantages for aerospace and automotive industries dealing with light alloys. Self-reacting friction stir welding (SR-FSW) is one variation of the FSW process being developed at the National Aeronautics and Space Administration (NASA) for use in the fabrication of propellant tanks. Friction plug welding is used to seal the exit hole that remains in a circumferential SR-FSW. This work reports on material properties and strain patterns developed in a SR-FSW with a friction plug weld. Specifically, this study examines the behavior of a SR-FSW formed between an AA 2014-T6 plate on the advancing side and an AA 2219-T87 plate on the retreating side and a SR-FSW (AA 2014-T6 to AA 2219-T87) with a 2219-T87 plug weld. This study presents the results of a characterization of the micro-hardness, joint strength, and strain field characterization of SR-FSW and FPW joints tested at room temperature and cryogenic temperatures.This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it. This work was reproduced from the original artifact, and remains as true to the original work as possible. Therefore, you will see the original copyright references, library stamps (as most of these works have been housed in our most important libraries around the world), and other notations in the work.This work is in the public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work.As a reproduction of a historical artifact, this work may contain missing or blurred pages, poor pictures, errant marks, etc. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.
Ventilation and Heating
Explore the principles of indoor climate control with "Ventilation and Heating" by John Shaw Billings. Originally published in 1893, this treatise offers a detailed examination of the methods and technologies employed for maintaining optimal environmental conditions in buildings during the late 19th century. Billings, a prominent figure in public health and hospital design, provides insights into the science and practical application of ventilation and heating systems. This book is invaluable for anyone interested in the history of engineering, architecture, and public health, as it showcases the state-of-the-art approaches to creating comfortable and healthy indoor spaces. Discover the historical context and evolution of modern HVAC systems through Billings' comprehensive study.This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it. This work was reproduced from the original artifact, and remains as true to the original work as possible. Therefore, you will see the original copyright references, library stamps (as most of these works have been housed in our most important libraries around the world), and other notations in the work.This work is in the public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work.As a reproduction of a historical artifact, this work may contain missing or blurred pages, poor pictures, errant marks, etc. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.
Hypersonic Global Strike Feasibility and Options
This paper explores the feasibility of hypersonic weapons and aircraft as global strike options in the 2035 timeframe. The paper proposes there are currently two limitations or gaps in U.S. prompt global strike capabilities; timeliness, and increasingly the ability to gain access to the highly-defended target area. Additionally, the USAF has a long history of using advanced technology to stay ahead of the threat defense systems and gaining access to target sets, and by 2035, anti-access and area denial (A2/AD) technologies will increasingly threaten the USAF ability to hold any target on the globe at risk. Therefore, given the fact that technologies will continue developing to diminish and deny the advantages of stealth and space assets, could speed once again allow access to denied, heavily defended targets and close the gap for prompt global strike by 2035? The analysis begins with a brief overview of past hypersonic programs and reveals the lack of coherent government policy or USAF confidence in future military utility for hypersonic weapons or aircraft.This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it. This work was reproduced from the original artifact, and remains as true to the original work as possible. Therefore, you will see the original copyright references, library stamps (as most of these works have been housed in our most important libraries around the world), and other notations in the work.This work is in the public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work.As a reproduction of a historical artifact, this work may contain missing or blurred pages, poor pictures, errant marks, etc. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.
Estimating the Effects of Radio Frequency Identification Tagging Technologies on the Army's War-Time Logistics Network
Some civilian business practices, such as radio frequency identification (RFID) tags, were used for the first time by the Army in a major conflict during Operation Iraqi Freedom (OIF). RFID tags were attached to every container and pallet in all sustainment shipments entering and exiting the area of operations (AOR). Although RFID tagging was somewhat successful during OIF, the logistics network still suffered significant problems, to include lack of asset visibility and ineffective theater distribution. Implementing business practices on the battlefield seems like an easy answer to these problems, but the implementation of RFID tags may or may not easily transition to a military of combat environment. The purpose of this research was to discover if the business practice of using RFID tags to track equipment and supplies could be effectively used in a war-time environment by the Army's logistics network.This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it. This work was reproduced from the original artifact, and remains as true to the original work as possible. Therefore, you will see the original copyright references, library stamps (as most of these works have been housed in our most important libraries around the world), and other notations in the work.This work is in the public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work.As a reproduction of a historical artifact, this work may contain missing or blurred pages, poor pictures, errant marks, etc. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.
Transforming U.S. Air Force Enlisted Aircraft Maintenance Training
How can the United States Air Force transform the way it trains a new generation of enlisted aircraft maintainers to support modern weapon systems despite a diminishing workforce? Infusing the latest commercial 3-D interactive computer technology into Air Force enlisted maintenance training programs capitalizes on the current generation's inherent technical skills, prepares them to work on advanced aircraft systems and saves scarce resources. From 1996 through 2003 the Air Force Audit Agency evaluated aircraft maintenance training in the Air National Guard, Air Force Reserve and active duty units and found all three require drastic improvements. An analysis of Bloom's Taxonomy on the cognitive, affective and psychomotor learning domains sets the groundwork for how the proliferation of computer technology improves knowledge, attitude and skills for young aircraft maintainers. The overall result is a transformation from antiquated classrooms used by previous generations to a digital classroom of the future that focuses on existing computer technologies. High-tech, interactive computer systems transform the way a new generation of Airmen learn aircraft systems and maintenance procedures. The Air Force produces a better trained maintenance workforce by slashing classroom time, increasing aircraft system knowledge and fostering greater interest in training.This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it. This work was reproduced from the original artifact, and remains as true to the original work as possible. Therefore, you will see the original copyright references, library stamps (as most of these works have been housed in our most important libraries around the world), and other notations in the work.This work is in the public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work.As a reproduction of a historical artifact, this work may contain missing or blurred pages, poor pictures, errant marks, etc. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.
Basic Field Manual, Vol. IV
This text includes signal regulations and technical information needed by officers and enlisted men of arms other than the Signal Corps engaged in signal communication. It supplements the matter contained in chapter 7, Basic Field Manual, Volume VIII, and prescribes in detail the installation, maintenance, and operation of signal communication agencies which are employed at and forward of brigade headquarters. Chapters include topics on field wire systems, radio, visual signaling, dropped and pick-up airplane messages, message center, orders and instructions for signal communication troops, meteorological information, Signal supply, and a table of radio communication equipment.This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it. This work was reproduced from the original artifact, and remains as true to the original work as possible. Therefore, you will see the original copyright references, library stamps (as most of these works have been housed in our most important libraries around the world), and other notations in the work.This work is in the public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work.As a reproduction of a historical artifact, this work may contain missing or blurred pages, poor pictures, errant marks, etc. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.
