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Helium Cryogenics
by Steven W. Van SciverTwenty five years have elapsed since the original publication of Helium Cryogenics. During this time, a considerable amount of research and development involving helium fluids has been carried out culminating in several large-scale projects. Furthermore, the field has matured through these efforts so that there is now a broad engineering base to assist the development of future projects. Helium Cryogenics, 2nd edition brings these advances in helium cryogenics together in an updated form. As in the original edition, the author's approach is to survey the field of cryogenics with emphasis on helium fluids. This approach is more specialized and fundamental than that contained in other cryogenics books, which treat the associated range of cryogenic fluids. As a result, the level of treatment is more advanced and assumes a certain knowledge of fundamental engineering and physics principles, including some quantum mechanics. The goal throughout the work is to bridge the gap between the physics and engineering aspects of helium fluids to provide a source for engineers and scientists to enhance their usefulness in low-temperature systems. Dr. Van Sciver is a Distinguished Research Professor and John H. Gorrie Professor of Mechanical Engineering at Florida State University. He is also a Program Director at the National High Magnetic Field Laboratory (NHMFL). Dr. Van Sciver joined the FAMU-FSU College of Engineering and the NHMFL in 1991, initiating and teaching a graduate program in magnet and materials engineering and in cryogenic thermal sciences and heat transfer. He also led the NHMFL development efforts of the cryogenic systems for the NHMFL Hybrid and 900 MHz NMR superconducting magnets. Between 1997 and 2003, he served as Director of Magnet Science and Technology at the NHMFL. Dr. Van Sciver is a Fellow of the ASME and the Cryogenic Society of America and American Editor for the journal Cryogenics. He is the 2010 recipient of the Kurt Mendelssohn Award. Prior to joining Florida State University, Dr. Van Sciver was Research Scientist and then Professor of Nuclear Engineering, Engineering Physics and Mechanical Engineering at the University of Wisconsin-Madison from 1976 to 1991. During that time he also served as the Associate Director of the Applied Superconductivity Center. Dr. Van Sciver received his PhD in Low Temperature Physics from the University of Washington-Seattle in 1976. He received his BS degree in Engineering Physics from Lehigh University in 1970. Dr. Van Sciver is author of over 200 publications and patents in low temperature physics, liquid helium technology, cryogenic engineering and magnet technology. The first edition of Helium Cryogenics was published by Plenum Press (1986). The present work is an update and expansion of that original project.
Helium Ion Microscopy
by David C. JoyHelium Ion Microscopy: Principles and Applications describes the theory and discusses the practical details of why scanning microscopes using beams of light ions - such as the Helium Ion Microscope (HIM) - are destined to become the imaging tools of choice for the 21st century. Topics covered include the principles, operation, and performance of the Gaseous Field Ion Source (GFIS), and a comparison of the optics of ion and electron beam microscopes including their operating conditions, resolution, and signal-to-noise performance. The physical principles of Ion-Induced Secondary Electron (iSE) generation by ions are discussed, and an extensive database of iSE yields for many elements and compounds as a function of incident ion species and its energy is included. Beam damage and charging are frequently outcomes of ion beam irradiation, and techniques to minimize such problems are presented. In addition to imaging, ions beams can be used for the controlled deposition, or removal, of selected materials with nanometer precision. The techniques and conditions required for nanofabrication are discussed and demonstrated. Finally, the problem of performing chemical microanalysis with ion beams is considered. Low energy ions cannot generate X-ray emissions, so alternative techniques such as Rutherford Backscatter Imaging (RBI) or Secondary Ion Mass Spectrometry (SIMS) are examined.
Helium Nano-bubble Formation in Tungsten: Measurement With Grazing-incidence Small Angle X-ray Scattering (Springer Theses)
by Matt ThompsonThis PhD thesis characterises the damage that occurs in tungsten when it is exposed to a fusion-like environment. The book presents pioneering work on the use of grazing-incidence small-angle X-ray scattering (GISAXS) to measure nano-bubble formation in tungsten exposed to helium plasma. The phenomenon of nanoscale bubble formation within metals during helium plasma exposure can lead to undesirable changes in the material properties, such as complex nanoscale surface modification or a reduction in thermal conductivity. As a result of this work, it is now possible to quantify how nanobubble behaviour changes within different materials, and under different plasma conditions. In 2015 the author published the first GISAXS study of helium-induced nanobubble formation in tungsten, demonstrating the viability of using GISAXS for this work. This paper has generated significant interest from the international fusion community and was selected as one of the highlights for the journal Nuclear Fusion.
Hell Divers
by Nicholas Sansbury SmithFrom the bestselling author that brought you the award-winning Extinction Cycle series, comes an all new vision of the apocalypse and the future of humanity. More than two centuries after World War III poisoned the planet, the final bastion of humanity lives on massive airships circling the globe in search for a habitable area to call home. Aging and outdated, most of the ships plummeted back to earth long ago. The only thing keeping the two surviving lifeboats in the sky are Hell Divers: men and women who risk their lives by diving to the surface to scavenge for parts the ships desperately need. When one of the remaining airships is damaged in an electrical storm, a Hell Diver team is deployed to a hostile zone called Hades. But there's something down there that's far worse than the mutated creatures discovered on dives in the past--something that threatens the fragile future of humanity. "Amazing settings, great characters, the end of the world shouldn't be this much fun!"--Matthew Mather, bestselling author of CyberStorm "An exciting new take on the end of the world and a thrilling race to survive... Sure to delight fans of survival and post-apocalyptic thrillers." --A.G. Riddle, best-selling author of The Atlantis Gene "Relentless action and danger in a gritty postapocalyptic world where survival depends on a few brave men and women. Hell Divers is one hell of a page turner!"--Bob Mayer, New York Times bestselling author of the Area 51 series "An action-packed page-turner...You won't be able to put this book down until the last searing page. And then you'll want the next book."--Mike Shepherd, New York Times bestselling author
Hell Divers II: Ghosts
by R. C. Bray Nicholas Sansbury SmithFrom the bestselling author that brought you the award-winning Extinction Cycle series, comes an all new vision of the apocalypse and the future of humanity.Ten years ago, Hell Diver Xavier “X” Rodriguez fell to Earth. Those he left behind went on without him aboard the airship he once called home. Michael Everheart—the boy once known as Tin—has grown into a man and the commander of Hell Diver Raptor Team. While Michael dives to help keep the Hive in the air, Captain Leon Jordan rules with an iron fist at the helm of the ship. But unrest stirs under his strict leadership as a prophecy of hope sweeps the lower decks.When a mysterious distress signal calls the Hell Divers to the surface, Michael and his loyal team begin to uncover long-buried truths and the secrets Captain Jordan will do anything to keep. They dive so humanity survives … but will they survive the ultimate betrayal?USA Today and Audible bestselling author Nicholas Sansbury Smith delivers another heart-pounding thriller in Hell Divers 2: Ghosts, the second book in the acclaimed science fiction series.“An exciting new take on the end of the world and a thrilling race to survive… Sure to delight fans of survival and post-apocalyptic thrillers.”—A.G. Riddle, author of The Atlantis Gene on Hell Divers“Relentless action and danger in a gritty postapocalyptic world where survival depends on a few brave men and women. Hell Divers is one hell of a page turner!”—Bob Mayer, New York Times bestselling author of the Area 51 series on Hell Divers“An action-packed page-turner…You won’t be able to put this book down until the last searing page.”—Mike Shepherd, New York Times bestselling author on Hell Divers
Hell Phone
by William SleatorNick wants a cell phone for talking to his girlfriend. Little does he know that a used cheap phone, puts him at risk for himself, and those he cares about.
The Hello Girls: America's First Women Soldiers
by Elizabeth CobbsIn 1918 the U.S. Army Signal Corps sent 223 women to France to help win World War I. Elizabeth Cobbs reveals the challenges these patriotic young women faced in a war zone where male soldiers resented, wooed, mocked, saluted, and ultimately celebrated them. Back on the home front, they fought the army for veterans’ benefits and medals, and won.
hello! hello! (Hyperion Picture Book (eBook))
by Matthew CordellOutside the world is bright and colorful, but Lydia's family is too busy with their gadgets to notice. She says Hello to everyone. Hello? Hello! Her father says hello while texting, her mother says hello while working on her laptop and her brother doesn't say hello at all. The T.V shouts Hello! But she doesn't want to watch any shows. Lydia, now restless, ventures outside. There are so many things to say hello to! Hello rocks! Hello leaves! Hello flowers! When Lydia comes back home she decides to show her family what she has found, and it's hello world and goodbye gadgets!
Hello, Sunshine!
by Amy TaoA little boy is out for a walk meets a new friend, the Sun! The sun tells the little boy about himself and all of the important things he does for Earth. Did you know that the sun is a star? Explore space with the sun as he tells you about why we have night and day!
Hello, World! Cars and Trucks (Hello, World!)
by Jill McDonaldLearn from home and explore the world with these fun and easy board books!Fans of cars and trucks will love this vehicle-filled book in the hit Hello, World! board book series. Toddlers can learn all about all kinds of exciting machines, with easy-to-understand facts and bright pictures of fast, fascinating things that go!Hello, World! board books introduce first nonfiction concepts to babies and toddlers. Told in clear and easy terms with read-aloud sound words ("Zap! This electric car gets plugged in to charge the engine") and featuring bright, cheerful illustrations, Hello, World! makes learning fun for young children. And each page offers helpful prompts for engaging with your child. It's a perfect way to bring science into the busy world of a toddler, where learning never stops. Look for all the books in the Hello, World! series: • Solar System• Weather• Backyard Bugs• Birds• Dinosaurs• My Body• How Do Apples Grow?• Ocean Life• Moon Landing• Pets• Arctic Animals• Construction Site• Rainforest Animals• Planet Earth • Reptiles• Cars and Trucks • Music• Baby Animals• On the Farm• Garden Time• Planes and Other Flying Machines• Rocks and Minerals• Snow
Hello, World! Construction Site (Hello, World!)
by Jill McDonaldLearn from home and explore the world with these fun and easy board books!Fans of Goodnight, Goodnight, Construction Site will love this vehicle-filled adventure in the hit Hello, World! board book series. Toddlers can learn all about the busy world of a construction site, with easy-to-understand facts about all the huge, noisy machines that captivate little ones' imaginations.Hello, World! is a series designed to introduce first nonfiction concepts to babies and toddlers. Told in clear and easy terms ("Clank! A crane is used to lift heavy things and move them to the right spot.") and featuring bright, cheerful illustrations, Hello, World! makes learning fun for young children. And each page offers helpful prompts for engaging with your child. It's a perfect way to bring science and nature into the busy world of a toddler, where learning never stops. Look for all the books in the Hello, World! series: • Solar System• Weather• Backyard Bugs• Birds• Dinosaurs• My Body• How Do Apples Grow?• Ocean Life• Moon Landing• Pets• Arctic Animals• Construction Site• Rainforest Animals• Planet Earth • Reptiles• Cars and Trucks • Music• Baby Animals• On the Farm• Garden Time• Planes and Other Flying Machines• Rocks and Minerals• Snow
Hello, World! How Do Apples Grow? (Hello, World!)
by Jill McDonaldLearn from home and explore the world with these fun and easy board books!Young children love to eat apples and go to orchards. Here's a Hello, World! board book that teaches toddlers all about how apples grow—from seed to sapling to tree to applesauce.Hello, World! is a series designed to introduce first nonfiction concepts to babies and toddlers. Told in clear and easy terms ("Apple seeds start to grow when they are planted in soil and given sunlight, water, and fresh air") and featuring bright, cheerful illustrations, Hello, World! is a perfect way to bring science, nature, and culture into the busy world of a toddler, where learning never stops.Look for all the books in the Hello, World! series: • Solar System• Weather• Backyard Bugs• Birds• Dinosaurs• My Body• How Do Apples Grow?• Ocean Life• Moon Landing• Pets• Arctic Animals• Construction Site• Rainforest Animals• Planet Earth • Reptiles• Cars and Trucks • Music• Baby Animals• On the Farm• Garden Time• Planes and Other Flying Machines• Rocks and Minerals• Snow
Hello, World! Moon Landing (Hello, World!)
by Jill McDonaldLearn from home and explore the world with these fun and easy board books!Discover all about the first moon landing with the hit nonfiction board book series Hello, World!All young children love to look up at the moon. Now here's a board book that teaches them all about the first moon landing, with easy-to-understand details about the Apollo 11 astronauts, the NASA team, spacesuits, the rocket modules, and the world's celebration after the successful mission.Hello, World! is a series designed to introduce first nonfiction concepts to babies and toddlers. Told in clear and easy terms ("An astronaut's job is to travel into space") and featuring bright, cheerful illustrations, Hello, World! is a perfect way to bring science, nature, and culture into the busy world of a toddler, where learning never stops. Look for all the books in the Hello, World! series: • Solar System• Weather• Backyard Bugs• Birds• Dinosaurs• My Body• How Do Apples Grow?• Ocean Life• Moon Landing• Pets• Arctic Animals• Construction Site• Rainforest Animals• Planet Earth • Reptiles• Cars and Trucks • Music• Baby Animals• On the Farm• Garden Time• Planes and Other Flying Machines• Rocks and Minerals• Snow
Hello, World! On the Farm (Hello, World!)
by Jill McDonaldLearn from home and explore the world with these fun and easy board books!Babies and toddlers get to visit a farm in this lively and informative addition to the hit Hello, World! board book series. Children can learn all about plants that grow, animals that help, and farmers who work hard, with easy-to-understand facts and bright pictures of rural life.Hello, World! board books introduce first nonfiction concepts to babies and toddlers. Told in clear and easy words with simple facts ("This red tractor is used for plowing, planting, and harvesting crops") and featuring bright, cheerful illustrations, Hello, World! makes learning fun for young children. It's a perfect way to bring science and nature into the busy world of a toddler, where learning never stops. Look for all the books in the Hello, World! series: • Solar System• Weather• Backyard Bugs• Birds• Dinosaurs• My Body• How Do Apples Grow?• Ocean Life• Moon Landing• Pets• Arctic Animals• Construction Site• Rainforest Animals• Planet Earth • Reptiles• Cars and Trucks• Music• On the Farm• Baby Animals
Hello, World! Planes and Other Flying Machines (Hello, World!)
by Jill McDonaldLearn from home and explore the world with these fun and easy board books!This bright and informative Hello, World! board book teaches toddlers all about planes and other machines that fly—with easy-to-understand facts about the many different ways humans can soar like birds.Hello, World! is a series designed to introduce first nonfiction concepts to babies and toddlers. Told in clear and easy terms ("The first people to fly a plane were the Wright brothers. They built their plane out of wood") and featuring bright, cheerful illustrations, Hello, World! makes learning fun for young children. And each page offers helpful prompts for engaging with your child. It's a perfect way to bring science and nature into the busy world of a toddler, where learning never stops. Look for all the books in the Hello, World! series: • Solar System• Weather• Backyard Bugs• Birds• Dinosaurs• My Body• How Do Apples Grow?• Ocean Life• Moon Landing• Pets• Arctic Animals• Construction Site• Rainforest Animals• Planet Earth • Reptiles• Cars and Trucks • Music• Baby Animals• On the Farm• Garden Time• Planes and Other Flying Machines• Rocks and Minerals• Snow
Helmholtz: A Life in Science (California Studies In The History Of Science Ser. #10)
by David CahanHermann von Helmholtz was a towering figure of nineteenth-century scientific and intellectual life. Best known for his achievements in physiology and physics, he also contributed to other disciplines such as ophthalmology, psychology, mathematics, chemical thermodynamics, and meteorology. With Helmholtz: A Life in Science, David Cahan has written a definitive biography, one that brings to light the dynamic relationship between Helmholtz’s private life, his professional pursuits, and the larger world in which he lived. Utilizing all of Helmholtz’s scientific and philosophical writings, as well as previously unknown letters, this book reveals the forces that drove his life—a passion to unite the sciences, vigilant attention to the sources and methods of knowledge, and a deep appreciation of the ways in which the arts and sciences could benefit each other. By placing the overall structure and development of his scientific work and philosophy within the greater context of nineteenth-century Germany, Helmholtz also serves as cultural biography of the construction of the scientific community: its laboratories, institutes, journals, disciplinary organizations, and national and international meetings. Helmholtz’s life is a shining example of what can happen when the sciences and the humanities become interwoven in the life of one highly motivated, energetic, and gifted person.
The Helmholtz Equation Least Squares Method
by Sean F. WuThis book represents the HELS (Helmholtz equation least squares) theory and its applications for visualizing acoustic radiation from an arbitrarily shaped vibrating structure in free or confined space. yIt culminates the most updated research work of the author and his graduate students since 1997. yThe book contains six chapters. yThe first serves as a review of the fundamentals in acoustics and the rest cover five specific topics on the HELS theory. "
Help--There's a Computer in My Classroom!
by Alison BallMastering basic computer skills can be a daunting task for any busy teacher. This book provides a solution with simple instructions backed up by pictures of what the computer screen should look like at each stage of an activity. Use this book to: find out what your computer can do; save and organise work on your computer; create activities for chil
Help Your Kids with Computer Coding: A Unique Step-by-Step Visual Guide, from Binary Code to Building Games (DK Help Your Kids)
by DKDon't just play computer games with your kids—build them! All you need is a desktop or laptop with Adobe 10.2 or later, and an internet connection to download Scratch 2.0 and Python 3. Coding with Scratch can be done without download on https://scratch.mit.edu.Help Your Kids with Computer Coding is a straightforward, visual guide to helping kids understand the basics of computer coding using Scratch and Python coding languages. Essential coding concepts like scripts, variables, and strings are explained using build-along projects and games.Kids can create online games to play like Monkey Mayhem and Bubble Blaster, draw mazes and shapes, build animations, and more using the step-by-step examples to follow and customize. Seven projects let kids—and their parents—practice the skills as they are learning in each section of the book. Kids get instant results, even when completely new to coding.Packed with visual examples, expert tips, a glossary of key terms, and extras such as profiles of famous coders, Help Your Kids with Computer Coding lays a hands-on foundation for coding so adults and kids can learn together.Supporting STEM education initiatives, computer coding teaches kids how to think creatively, work collaboratively, and reason systematically, and is quickly becoming a necessary and sought-after skill. DK's computer coding books are full of fun exercises with step-by-step guidance, making them the perfect introductory tools for building vital skills in computer programming. Series Overview: DK's bestselling Help Your Kids With series contains crystal-clear visual breakdowns of important subjects. Simple graphics and jargon-free text are key to making this series a user-friendly resource for frustrated parents who want to help their children get the most out of school.
Help Your Kids with Science: A Unique Step-by-Step Visual Guide (DK Help Your Kids)
by DKIf you&’re left blinded by science, this ultimate study aid makes everything clear. This unique visual reference guide adopts a simple step-by-step approach to give you a complete understanding of this diverse and difficult subject. Bubbling over with pictures, diagrams, and information, this book covers biology, chemistry, and physics in comprehensive depth and detail. Help Your Kids with Science encourages parents and children to work together as a team to solve even the most challenging problems on the school syllabus. The reference section also includes a glossary of key scientific terms and symbols. With your support, children can gain a complete understanding of science, leaving them calm, confident, and exam ready. Series Overview: DK's bestselling Help Your Kids With series contains crystal-clear visual breakdowns of important subjects. Simple graphics and jargon-free text are key to making this series a user-friendly resource for frustrated parents who want to help their children get the most out of school.
Helping Children Learn Mathematics
by Mathematics Learning Study CommitteeFor our youth to succeed, we need to change how we require teaching mathematics. Helping Children Learn Mathematics provides comprehensive and reliable information that will guide efforts to improve school mathematics from pre-kindergarten through eighth grade. The authors discuss the major changes that need to be made in mathematics instruction, instructional materials, assessments, teacher education, and the broader educational system.
Helping Hands
by Elizabeth PrestonSome kids are born missing a hand or fingers, others lose them because of accidents. Find out how people are printing artificial hands on 3-D printers to help those who need a hand. They are cheap, easy to build, and really work!
Helping Stop Hitler's Luftwaffe: The Memoirs of a Pilot Involved in the Development of Radar Interception, Vital in the Battle of Britain
by Arthur McDonaldAn RAF pilot recounts his vital role in the development of Britain’s WWII air defense system in this fascinating military memoir.During the 1930s, the UK had no realistic defense against fast-flying bomber planes. That was before radar technology proved capable of detecting an aircraft before it even reached British soil. This was shown in dramatic fashion during the Biggin Hill Experiment, when a young Arthur McDonald led three biplanes—all directed by radar sets on the ground—to intercept incoming aircraft. McDonald was told, “the whole future of this country depends on the results which you obtain.” His success led to a new military strategy focused on modern fighter planes using a newly developed radar network—all of which proved crucial during the Battle of Britain. For his work, McDonald received the Air Force Cross.In this enlightening autobiography, Air Marshal Sir Arthur McDonald describes those early radar experiments as well his other innovation, the Duxford flare path, designed to be visible to landing aircraft but not to enemy attackers. McDonald went on to hold many senior posts in the RAF before retiring in 1962. But it his part in the development of Britain’s air defense at the most crucial time in its history for which he will always be remembered.
Hemeon's Plant & Process Ventilation
by D. Jeff BurtonIndustrial hygienists and ventilation engineers know the name well: W.C.L. Hemeon. Since 1955, those professionals have frequently looked to Hemeon's Plant & Process Ventilation for essential information on industrial ventilation. Hemeon's longtime influence and inspiration has now prompted D. Jeff Burton-a prolific author on industrial ventilation himself-to produce a Fourth Edition of "the classic industrial ventilation text."While retaining Hemeon's distinctive writing style, conveying practical information in vivid phrasing, Burton has added extensive new information to recognize today's technology and techniques.Essential fundamentals of ventilation covered in the book include an explanation about the dynamic properties of airborne contaminants, and the principles of dispersion mechanism and local exhaust. Advanced applications are also examined in detail, particularly system design, dust control, and troubleshooting.Along with providing essential background on the two primary types of workplace ventilation-general and local exhaust-Hemeon's Plant & Process Ventilation also aims for mutual understanding between the health-oriented priorities of industrial hygienists, and the practical applications for maximum efficiency considered by ventilation engineers.Have a well-thumbed, dog-eared copy of Hemeon's Plant & Process Ventilation? Now is the best time to retire it in favor of this revised-and respectful-edition. Those who are new to Hemeon's approach will discover what other professionals have known more than 40 years: Hemeon offers some of the most effective ways to control environmental contaminates through proper ventilation techniques.
Hemicelluloses and Lignin in Biorefineries (Green Chemistry and Chemical Engineering)
by Jean-Luc Wertz Magali Deleu Séverine Coppée Aurore RichelHemicelluloses and Lignin in Biorefineries provides an understanding of lignocellulosic biomass, which is mainly composed of cellulose, hemicelluloses, and lignin. It promotes the valorization of these molecules in the context of the bioeconomy and presents hemicelluloses and lignin, which are generated in lignocellulosic biorefineries, as the molecules of the future. The viability of these molecules lies in their renewability and potential. This book covers all aspects of hemicelluloses and lignin including structure, biosynthesis, extraction, biodegradation, and conversion. The book also looks ahead to the socioeconomic and environmental value of biobased industry and emphasizes an understanding of the potential of lignocellulosic biomass.