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Weed Control Methods for Public Health Applications
by E.O. GangstadThis volume includes measures of control of aquatic vegetation that harms human health, since water-related diseases exist in this environment. Although malaria has receded internationally due to the combined chemotherapeutic-insecticidal programs, recently it has resisted both medicines and insecticide control. Active malaria cases in the U.S. were fewer than a dozen before the Vietnam War, but in 1973 the figure was ab out 700, almost all traceable to returning military personnel. The disease could again become prevalent. Other diseases exist whose transmission is indirectly affected by aquatic weed conditions including filariasis, and various trematodiases, especially from the schistosomes, Chinese liver fluke, cattle liver fluke, Guinea worm, giant intestinal fluke, Asiatic lung fluke, and broad tapeworm. Waterweeds also support disease-pest arthropods, i.e., snipe flies, tabanids (horse, gad, deer, and greenheads), Clear Lake gnats, Mayflies, black flies, sandflies, and sewage flies.Ecosystem studies of impounded water research and development of herbivorous fish, and utilization of herbivorous fish in China, are also included in this volume.
Weed Control Methods For Recreation Facilities Management
by Edward O. GangstadIt is the purpose of this volume to survey and assess the management problems of recreation waters and to present case problems from the field in which the technical data, published literature, and the operations mechanics are given in sufficient detail to provide a format for practical analysis and application. Special emphasis has been given to measures of control of Eurasian watermilfoil.The primary and secondary uses of a body of water determine the need, frequency, and kind of aquatic plant control required to meet the needs of a specific situation. That is to say, a given body of water may be used primarily, or even exclusively for such activities as fishing, boating, or swimming, and the water itself may be used for domestic (potable water), industrial production, and/or agriculture. These uses may seem to be incompatible in themselves, but it is incumbent upon management to supply the optimum conditions for total water use.
Weed Control Methods for Rights of Way Management
by Edward O. GangstadThis volume describes in detail methods of control and related data including (1) all vegetation on industrial sites, paved highways, and railroad ballast, (2) woody vegetation along roadsides, utility lines, and fire breaks, and (3) aquatic vegetation on rivers and stream banks, waterways, ponds, reservoirs, irrigation, and drainage channels.
Weed Control Methods for River Basin Management
by E.O. GangstadAquatic plants continue to create problems associated with navigation, flood control, agriculture, irrigation and drainage, values of lands, conservation of wildlife and fisheries, and water resource supply. While much research is being done to find more effective and economic control measures, there is now a great need to apply known facts to achieve a measure of control by the means available. It is the purpose of this volume to provide a scientifically documented treatise of the known facts as they apply to the control of aquatic weeds in river basins and their allied waterways with particular emphasis on alligator weed and water hyacinth.
Weed Control on Vine and Soft Fruits
by Commission of the European CommunitiesThis book demonstrates the common problems faced by fruit growers throughout the Community and shows the importance of weeds in fruit crops. It summarizes a list of the worst weeds in vine and soft fruits in each European Country.
Weed Physiology: Volume I: Reproduction and Ecophysiology
by Stephen O. DukeWeeds are plants existing at places and/or times at which they are considered undesirable by man. Thys, man‘s primary interest in weeds is in dinging methods for eliminating their presences. Understanding the physiology of weeds and how it differs from that of crop plants is becoming increasingly important in discovering new chemical, genetic, and cultural methods of controlling weeds. The two volumes of this book will aim to discuss the following; the physiology of weed production the ecophysiology of weeds, the mechanisms of herbicide action, and the mechanisms of herbicide resistance and tolerance.
Weed Science and Weed Management in Rice and Cereal-Based Cropping Systems, 2 Volumes
by Aurora M. Baltazar Surajit K. De DattaThe book presents discussions on: Biology and ecology of major troublesome weeds infesting rice, wheat, corn, soybean, focusing on different cropping patterns in both tropical and temperate cropping systems and science-based weed management practices involving chemical, non-chemical, biological, integrated methods. Herbicides used, with their most recent classification, identification of new target sites, mechanisms and modes of action and how and why weeds evolve resistance to herbicides. New concepts, new paradigms and new technologies to manage evolution of resistance to herbicides including weed genomics, bioherbicides and allelochemicals. Highly recommended for students, teachers, researchers, agronomists, horticulturists, crop physiologists, and crop protection specialists in tropical and temperate agricultural systems, particularly in areas where major tropical weeds are posing potential threats to temperate agricultural systems.
Weed Science - A Plea for Thought - Revisited
by Robert L. ZimdahlWeed scientists are confident of increasing production through agricultural technology, including herbicides, but do not must ask if the moral obligation to feed people is sufficient justification for the benefits and harms achieved. A continuing, rigorous examination of the science's goals that leads to appropriate change is advocated. Weed scientists have a research consensus - a paradigm - Weeds must be controlled. Herbicides are the best control technology. Agriculture's practitoners should discuss the necessity and risks of their technology. Discussion must include scientific evidence and value-laden arguments.
Weekend Pilots: Technology, Masculinity, and Private Aviation in Postwar America
by Alan MeyerThe inside story of the hypermasculine world of American private aviation.In 1960, 97 percent of private pilots were men. More than half a century later, this figure has barely changed. In Weekend Pilots, Alan Meyer provides an engaging account of the postWorld War II aviation community. Drawing on public records, trade association journals, newspaper accounts, and private papers and interviews, Meyer takes readers inside a white, male circle of the initiated that required exceptionally high skill levels, that celebrated facing and overcoming risk, and that encouraged fierce personal independence.The Second World War proved an important turning point in popularizing private aviation. Military flight schools and postwar GI-Bill flight training swelled the ranks of private pilots with hundreds of thousands of young, mostly middle-class men. Formal flight instruction screened and acculturated aspiring fliers to meet a masculine norm that traced its roots to prewar barnstorming and wartime combat training. After the war, the aviation community's response to aircraft designs played a significant part in the technological development of personal planes. Meyer also considers the community of pilots outside the cockpit—from the time-honored tradition of "hangar flying" at local airports to air shows to national conventions of private fliers—to argue that almost every aspect of private aviation reinforced the message that flying was by, for, and about men. The first scholarly book to examine in detail the role of masculinity in aviation, Weekend Pilots adds new dimensions to our understanding of embedded gender and its long-term effects.
Wege aus dem Schullüftungsfiasko: Wie die Atemluft in Schulen gesünder werden kann (essentials)
by Peter MüllerHunderttausende Kinder und Lehrer werden auch in diesem Winter frieren, weil aus Hygienegründen die Fenster geöffnet werden müssen. Aber nicht nur das COVID-19-Virus ist Ursache für die Schullüftungsproblematik. Auch die Belastung der Atemluft durch weitere Luftinhaltstoffe, insbesondere durch CO2, kann negative Folgen für die Gesundheit haben und Konzentrationsmängel und Müdigkeit verursachen.
Wege zur Dorferneuerung: praktisches Fachwissen zur Bildung von Agro-Energiewirtschaften (SDG - Forschung, Konzepte, Lösungsansätze zur Nachhaltigkeit)
by Bernhard Adler Martin Dykstra Michael WintersteinVorliegendes Buch ist für Landwirte und die Bevölkerung des ländlichen Raumes konzipiert. Die Landwirte bekommen derzeit für die landwirtschaftlichen Produkte nicht den preislichen Gegenwert für ihre geleistete Arbeit. Die Bevölkerung im ländlichen Raum leidet unter der Abwanderung junger Leute und dem Zusammenbruch der Infrastrukturen. Beide Gruppen können durch eigenständiges Handeln diese Situation selbstständig und nachhaltig verbessern, denn die Ackerfläche bietet das Potenzial für zukünftige neue Produkte für die Energieversorgung. Dazu offeriert das Buch Strategien, Nahrungsmittel und Energien in Agro-Energiekomplexen zu gewinnen. Hierfür werden Synergismen bei der Produktion in der Pflanzen- und Energieproduktion auch unter dem Aspekt eines klimabedingten, temporären Wassermangels diskutiert sowie die Vorteile des Klarwassereinsatzes zur Bewässerung der Ackerböden. Nicht unerheblich scheint auch die Nutzung von Phosphat- und Ammoniumionen als Vollwertdüngemittel aus dem Abwasserrecycling. Beide obengenannten Zielgruppen erreichen eine spürbare Verbesserung ihrer Lebensverhältnisse durch die Bildung von Anbau- und Nutzergemeinschaften.
Weight Function Methods in Fracture Mechanics: Theory and Applications
by Xue-Ren Wu Wu XuThis book provides a systematic and standardized approach based on the authors’ over 30 years of research experience with weight function methods, as well as the relevant literature. Fracture mechanics has become an indispensable tool for the design and safe operation of damage-tolerant structures in many important technical areas. The stress intensity factor—the characterizing parameter of the crack tip field—is the foundation of fracture mechanics analysis. The weight function method is a powerful technique for determining stress intensity factors and crack opening displacements for complex load conditions, with remarkable computational efficiency and high accuracy.The book presents the theoretical background of the weight function methods, together with a wealth of analytical weight functions and stress intensity factors for two- and three-dimensional crack geometries; many of these have been incorporated into national, international standards and industrial codes of practice. The accuracy of the results is rigorously verified, and various sample applications are provided. Accordingly, the book offers an ideal reference source for graduate students, researchers, and engineers whose work involves fracture and fatigue of materials and structures, who need not only stress intensity factors themselves but also efficient and reliable tools for obtaining them.
Weighted and Fuzzy Graph Theory (Studies in Fuzziness and Soft Computing #429)
by Sunil Mathew John N. Mordeson M. BinuOne of the most preeminent ways of applying mathematics in real-world scenario modeling involves graph theory. A graph can be undirected or directed depending on whether the pairwise relationships among objects are symmetric or not. Nevertheless, in many real-world situations, representing a set of complex relational objects as directed or undirected is not su¢ cient. Weighted graphs o§er a framework that helps to over come certain conceptual limitations. We show using the concept of an isomorphism that weighted graphs have a natural connection to fuzzy graphs. As we show in the book, this allows results to be carried back and forth between weighted graphs and fuzzy graphs. This idea is in keeping with the important paper by Klement and Mesiar that shows that many families of fuzzy sets are lattice isomorphic to each other. We also outline the important work of Head and Weinberger that show how results from ordinary mathematics can be carried over to fuzzy mathematics. We focus on the concepts connectivity, degree sequences and saturation, and intervals and gates in weighted graphs.
The Weil Conjectures: On Math and the Pursuit of the Unknown
by Karen OlssonA New York Times Editors' Pick and Paris Review Staff Pick"A wonderful book." --Patti Smith"I was riveted. Olsson is evocative on curiosity as an appetite of the mind, on the pleasure of glutting oneself on knowledge." --Parul Sehgal, The New York TimesAn eloquent blend of memoir and biography exploring the Weil siblings, math, and creative inspirationKaren Olsson’s stirring and unusual third book, The Weil Conjectures, tells the story of the brilliant Weil siblings—Simone, a philosopher, mystic, and social activist, and André, an influential mathematician—while also recalling the years Olsson spent studying math. As she delves into the lives of these two singular French thinkers, she grapples with their intellectual obsessions and rekindles one of her own. For Olsson, as a math major in college and a writer now, it’s the odd detours that lead to discovery, to moments of insight. Thus The Weil Conjectures—an elegant blend of biography and memoir and a meditation on the creative life.Personal, revealing, and approachable, The Weil Conjectures eloquently explores math as it relates to intellectual history, and shows how sometimes the most inexplicable pursuits turn out to be the most rewarding.
Weird Inventions (Anything But Ordinary)
by Jennifer KaulHumans are ingenious when it comes to meeting challenges. We invent all sorts of useful contraptions from the wheel to the can opener. But some of the things people have come up with are truly odd. Who came up with grass sandals, and why? Have you ever heard of a portable radio hat? Not many people have, but someone invented it. Get the inside scoop on these odd contraptions and many more weird inventions.
Weird Tales from the Inventors' Hall of Fame
by Liz HuyckHave you ever wondered how war machines were created? Or the origin of beauty salons? Or maybe even how rubber is used in tires, and rubber shoes? Learn more about these renowned inventors and how their inventions helped shape modern life into the way we know it now!
WEIZAC: An Israeli Pioneering Adventure in Electronic Computing (SpringerBriefs in History of Science and Technology)
by Leo Corry Raya LeviathanThe book tells the unique story of WEIZAC, an early computer built by a “new nation” in the early 1950s. It was created in Israel, even though the feasibility of this project was actually close to null when it was initially conceived, in 1946, and, unlike most of the early computer projects, was privately financed mainly by the Jewish world community. The book draws on a wealth of documents and historical insights to reveal the processes and powers that led to the successful completion of the project and, as well as its actual impact on scientific activities in Israel, and on the rise of a local computing community.Based on archival data, the book shows how a synergy of personal dedication together with an organizational and national mission that links the Zionist vision with science and technology for the Jewish people helped to achieve a well-defined goal.The book offers intriguing insights and refreshing perspectives to all readers interested in the Zionist movement or in the history of computing.
Welcome, Humans: A Visit to the Robot Hotel (Fountas & Pinnell Classroom, Guided Reading Grade 4)
by Susanna LoboROBOTS EVERYWHERE At one hotel in Japan, guests are greeted at the front desk by robot workers—and robot dinosaurs! Actually, very few humans work here. At this hotel, almost all the workers are robots. NIMAC-sourced textbook
Welcome to Dweeb Club
by Betsy UhrigFor fans of Gordon Korman comes a hilarious, heartfelt middle grade adventure about a school club whose members stumble across video footage of themselves from five years in the future.What if a school club changed your life forever? In the second week of seventh grade, Jason Sloan signs up for the brand-new HAIR Club. He and his friends have no idea what it&’s about, but since they&’re the first to sign up they figure they&’ll be in charge in no time. The club turns out to be super weird: using fancy new equipment donated by a mysterious benefactor, the members are supposed to monitor school security footage. Their first assignment: find out what is stealing the cafeteria&’s croutons. Instead of the expected dark cafeteria, the computers show the club members something else entirely: actual footage of themselves as high school seniors, five years in the future! What on earth could be happening? Is it some kind of time warp, or alternate reality? Or is it just an un-funny prank? As they scramble to solve the mystery, they can&’t help but notice something else—none of them like what they see five years from now. Is there any way to change the future—and their fates? Figuring out who you are and who you want to become has never been funnier in this laugh-out-loud romp through the perils of middle school—and beyond.
Welcome to the Machine
by Derrick Jensen George DraffanYou could call them the Monkeywrench Gang of the nanotech age. Derrick Jensen and George Draffan are taking down the data mining industry, one converted mind at a time. In the face of RFID chips, consumer tracking strategies, and illegal government wiretapping, Jensen and Draffan are determined to show consumers how to fight back against government and industry to regain their rights, their privacy, and their humanity. In "Welcome to the Machine: Science, Surveillance, and the Culture of Control," Jensen and Draffan take a hart-hitting look at the way technology is used as a machine, to control us and our environment. Most people would be disturbed if you told them that everything from their store purchases to their public transit rides are recorded and filed for government or corporate access. But more often than not, the smooth, silent cleanliness of its operation allows the Machine of Western Civilization to go unnoticed. Jensen and Draffan are back to reveal both the terrifying extent of surveillance today and our chilling complacency at the loss of everything from consumer privacy to civil liberties. In this timely and important new collaboration, Jensen and Draffan take on all aspects of Control Culture: everything from the government's policy of total information awareness to a disturbing new technology where soldiers can be given medication to prevent them from feeling fear. They write about pharmaceutical packaging that reports consumer information, which is then used to send targeted drug advertisements directly to your TV.
Welded High Strength Steel Structures: Welding Effects and Fatigue Performance
by Jin JiangWelded High Strength Steel Structures Understand the impact of fatigue on high strength steel joints with this comprehensive overview High strength steels are highly sought after for industrial and engineering applications ranging from armored vehicles to welded engineering components built to withstand considerable stress. The mechanical properties of welded joints made from high strength steel are integrally linked to the specific welding process, which can have an enormous impact on fatigue performance. Welded High Strength Steel Structures: Welding Effects and Fatigue Performance provides a comprehensive analysis of high strength steel joints and the ramifications of the welding process. It guides readers through the process of performing thermal analysis of high strength steel structures and evaluate fatigue performance in the face of residual stress. The result is a volume with innumerable use cases in engineering and manufacture. Welded High Strength Steel Structures readers will also find: An author with decades of experience in research and engineering Numerous studies of various classes of high strength steel joints Studies on tubular structures for welding residual stress Welded High Strength Steel Structures is a must-own for welding specialists, materials scientists, mechanical engineers, and researchers or industry professionals in related fields.
Welder's Handbook: A Guide to Plasma Cutting, Oxyacetylene, Arc, MIG and TIG Welding
by Richard FinchThe author talks about the evolution of welding along with technology, mentioning how arc welding equipment which once used to be the size of a refrigerator is now available as a compact pluggable gadget.
Welding (Fundamentals of Service Series)
by Deere Company StaffThe main purpose of this manual is to explain the different types of welding processes, cutting, brazing, soldering, surfacing, design of welds, properties of metals and welding safety. For the novice, this manual is a training guide. All-new welding projects at the end of the book augment this training. For the journeyman, it is a reference. This manual can be used by anyone -- experienced mechanics and shop trainees; as well a vocational students and interested laymen. It starts with the basics and builds your knowledge step-by-step in a very structured manner, making the information easy to understand.
Welding: Principles and Applications
by Larry JeffusThis newly updated sixth edition of Welding: Principles and Applications features tight shots of actual welds to speed beginners to an understanding of a variety of different welding processes used today. Moving quickly from basic concepts to the study of today's most complex welding technologies, each section begins by introducing readers to the materials, equipment, setup procedures, and critical safety information they need to know to successfully execute a specific process. Remaining chapters in the section zero in on individual welding tasks and must-know techniques. Comprehensive coverage spans from specific welding processes to discussion of related topics, including welding metallurgy, metal fabrication, weld testing and inspection, joint design, and job costing. Objectives, key terms, review questions, lab experiments, and practice exercises in every chapter are also included to focus attention on information and skills required for success as a professional welder.
Welding: Principles and Applications
by Larry Jeffus<p>This proven guide provides students with the knowledge and skills they need to complete AWS SENSE Level I and Level II programs, create Workmanship Qualification Specimens, and earn professional certification. Advancing rapidly from basic concepts and processes to today’s most complex, cutting-edge welding technologies and practices, this comprehensive text features valuable information on topics such as welding metallurgy, metal fabrication, weld testing and inspection, joint design, job costing, and environmental and conservation tips. <p>The author opens each section by introducing students to the materials, equipment, setup procedures, and critical safety information they need to execute a specific process successfully, while subsequent chapters focus on individual welding tasks leading to SENSE certification.</p>