- Table View
- List View
GPU Solutions to Multi-scale Problems in Science and Engineering
by David A. Yuen Wei Ge Lennart Johnsson Long Wang Xuebin Chi Yaolin ShiThis book covers the new topic of GPU computing with many applications involved, taken from diverse fields such as networking, seismology, fluid mechanics, nano-materials, data-mining , earthquakes ,mantle convection, visualization. It will show the public why GPU computing is important and easy to use. It will offer a reason why GPU computing is useful and how to implement codes in an everyday situation.
GTPase Protocols
by Ed Manser Thomas LeungEdward J. Manser and Thomas Leung have collected the key techniques currently in use to probe the function of these ubiquitous proteins both in vitro and in vivo. Presented in a format that ensures ready reproducibility by accomplished experimentalists who have refined the various methods in their laboratories, each technique includes step-by-step instructions, tips on avoiding pitfalls and troubleshooting, and ancillary notes explaining how to adapt each procedure in the event of problems. The methods cover the spectrum of core techniques required for the five major GTPase subfamilies (Ras, Rho, Rab, Arf, and Ran) and permit a diversity of applications ranging from structural studies on a GTPase to real time in vivo analysis. Timely and highly practical, GTPase Protocols: The Ras Superfamily illuminates the powerful techniques used by investigators today to study this special family of proteins that plays such important roles in human health and disease.
GTPases
by Amita Pandey Girdhar K. Pandey Manisha Sharma Thiruvenkadam ShanmugamG proteins are the key regulators for a wide range of cellular processes in animals and plants. In comparison to animals and yeast, plants have a single Rho-GTPase subfamily called Rho-like GTPases (ROPs). The ROP family of monomeric GTPases has emerged as a versatile and key regulator in plant signal transduction processes. During the past few years' studies on plant RHO-type (ROP) GTPase have generated new insights into their role in diverse processes ranging from cytoskeletal organization, polar growth, development to stress and hormonal responses. Studies have shown that plants have evolved specific regulators and effector molecules. ROP GTPases possess the ability to interact with these multiple regulator and effector molecules that ultimately determines their signaling specificity. Recently, genome wide studies in plants have shown that the Arabidopsis genome encodes 93, and rice has nearly 85 small GTPase homologs. And we have been able to identify four new homologs in the rice genome. Here, we focus on the complete phylogenetic, domain, structural and expression analysis during stress and various developmental processes of small GTPases in plants. The comparison of gene expression patterns of the individual members of the GTPase family may help to reveal potential plant specific signaling mechanisms and their relevance. Also, we are summarizing the role of currently known ROP GTPases and their interacting proteins with brief description, simultaneously, comparing their expression pattern based on microarray data. Overall, we will be discussing the functional genomic perspective of plant Rho like GTPases and their role in regulating several physiological processes such as stress, hormonal, pollen tube, root hair-growth and other developmental responses.
GUATEMALA: Human Rights and the Myrna Mack Case
by Committee on Human RightsTwo members of the Committee on Human Rights (CHR), NAS member Mary Jane West-Eberhard and NAS/NAE member Morton Panish, undertook a mission to Guatemala to observe the trial of two high-level Guatemalan military officials who were charged with ordering the murder of Guatemalan anthropologist Myrna Mack. She was stabbed to death in 1990, two days after a report for which she was principal researcher, “Assistance and Control: Policies Toward Internally Displaced Populations in Guatemala,” was published by the Georgetown University Press. Ms. Mack had been doing research on and writing about the unjust treatment of the internally displaced people in Guatemala. Thirteen years after Ms. Mack’s murder—after the case had gone through dozens of courts and countless delays—a general and colonel in the Guatemalan military intelligence apparatus were brought to trial, and one was convicted. This marked the first time in Guatemalan history that a high-level military official had been brought to justice for atrocities he committed during Guatemala’s 30-year civil war. This report summarizes the one-month trial proceedings.
GULF WAR and HEALTH: HEALTH EFFECTS OF SERVING IN THE GULF WAR
by Institute of Medicine of the National AcademiesIn 1998, in response to the growing concerns that many returning Gulf War veterans began reporting numerous health problems that they believed to be associated with their service in the Persian Gulf, Congress passed two laws which directed the Secretary of Veterans Affairs to enter into a contract with the National Academy of Sciences. They were tasked to review and evaluate the scientific and medical literature regarding associations between illness and exposure to toxic agents, environmental or wartime hazards, and preventive medicines or vaccines associated with Gulf War service. In addition, the Institute of Medicine of the National Academy of Sciences provided conclusions to these studies that were considered when making decisions about compensation to veterans. Gulf War and Health Volume 4: Health Effects of Serving in the Gulf War summarizes in one place the current status of health effects in veterans deployed to the Persian Gulf irrespective of exposure information. This book reviews, evaluates, and summarizes both peer-reviewed scientific and medical literature addressing the health status of Gulf War veterans.
GULF WAR and HEALTH: VOLUME 6
by Institute of Medicine of the National AcademiesThe sixth in a series of congressionally mandated reports on Gulf War veterans' health, this volume evaluates the health effects associated with stress. Since the launch of Operation Desert Storm in 1991, there has been growing concern about the physical and psychological health of Gulf War and other veterans. In the late 1990s, Congress responded by asking the National Academy of Sciences (NAS) to review and evaluate the scientific and medical literature regarding associations between illness and exposure to toxic agents, environmental or wartime hazards, and preventive medicines or vaccines in members of the armed forces who were exposed to such agents. Deployment to a war zone has a profound impact on the lives of troops and on their family members. There are a plethora of stressors associated with deployment, including constant vigilance against unexpected attack, difficulty distinguishing enemy combatants from civilians, concerns about survival, caring for the badly injured, and witnessing the death of a person. Less traumatic but more pervasive stressors include anxiety about home life, such as loss of a job and income, impacts on relationships, and absence from family. The focus of this report, by the Institute of Medicine (IOM) Committee on Gulf War and Health: Physiologic, and Psychosocial Effects of Deployment-Related Stress, is the long-term effects of deployment-related stress. Gulf War and Health: Volume 6. Physiologic, and Psychosocial Effects of Development Related Stress evaluates the scientific literature regarding association between deployment-related stressors and health effects, and provides meaningful recommendations to remedy this problem.
GaN Transistors for Efficient Power Conversion: The Egan Fet Journey Continues
by Alex Lidow Michael De Rooij Johan Strydom David ReuschGallium nitride (GaN) is an emerging technology that promises to displace silicon MOSFETs in the next generation of power transistors. As silicon approaches its performance limits, GaN devices offer superior conductivity and switching characteristics, allowing designers to greatly reduce system power losses, size, weight, and cost. This timely second edition has been substantially expanded to keep students and practicing power conversion engineers ahead of the learning curve in GaN technology advancements. Acknowledging that GaN transistors are not one-to-one replacements for the current MOSFET technology, this book serves as a practical guide for understanding basic GaN transistor construction, characteristics, and applications. Included are discussions on the fundamental physics of these power semiconductors, layout and other circuit design considerations, as well as specific application examples demonstrating design techniques when employing GaN devices. With higher-frequency switching capabilities, GaN devices offer the chance to increase efficiency in existing applications such as DC-DC conversion, while opening possibilities for new applications including wireless power transfer and envelope tracking. This book is an essential learning tool and reference guide to enable power conversion engineers to design energy-efficient, smaller and more cost-effective products using GaN transistors. Key features: Written by leaders in the power semiconductor field and industry pioneers in GaN power transistor technology and applications. Contains useful discussions on device-circuit interactions, which are highly valuable since the new and high performance GaN power transistors require thoughtfully designed drive/control circuits in order to fully achieve their performance potential. Features practical guidance on formulating specific circuit designs when constructing power conversion systems using GaN transistors - see companion website for further details. A valuable learning resource for professional engineers and systems designers needing to fully understand new devices as well as electrical engineering students.
GaN Transistors for Efficient Power Conversion: The Egan Fet Journey Continues
by Alex Lidow Johan Strydom David Reusch John Glaser Michael de RooijAn up-to-date, practical guide on upgrading from silicon to GaN, and how to use GaN transistors in power conversion systems design This updated, third edition of a popular book on GaN transistors for efficient power conversion has been substantially expanded to keep students and practicing power conversion engineers ahead of the learning curve in GaN technology advancements. Acknowledging that GaN transistors are not one-to-one replacements for the current MOSFET technology, this book serves as a practical guide for understanding basic GaN transistor construction, characteristics, and applications. Included are discussions on the fundamental physics of these power semiconductors, layout, and other circuit design considerations, as well as specific application examples demonstrating design techniques when employing GaN devices. GaN Transistors for Efficient Power Conversion, 3rd Edition brings key updates to the chapters of Driving GaN Transistors; Modeling, Simulation, and Measurement of GaN Transistors; DC-DC Power Conversion; Envelope Tracking; and Highly Resonant Wireless Energy Transfer. It also offers new chapters on Thermal Management, Multilevel Converters, and Lidar, and revises many others throughout. Written by leaders in the power semiconductor field and industry pioneers in GaN power transistor technology and applications Updated with 35% new material, including three new chapters on Thermal Management, Multilevel Converters, Wireless Power, and Lidar Features practical guidance on formulating specific circuit designs when constructing power conversion systems using GaN transistors A valuable resource for professional engineers, systems designers, and electrical engineering students who need to fully understand the state-of-the-art GaN Transistors for Efficient Power Conversion, 3rd Edition is an essential learning tool and reference guide that enables power conversion engineers to design energy-efficient, smaller, and more cost-effective products using GaN transistors.
GaN and Related Materials
by 9789056995171Presents views on current developments in heat and mass transfer research related to the modern development of heat exchangers. Devotes special attention to the different modes of heat and mass transfer mechanisms in relation to the new development of heat exchangers design. Dedicates particular attention to the future needs and demands for further development in heat and mass transfer. GaN and related materials are attracting tremendous interest for their applications to high-density optical data storage, blue/green diode lasers and LEDs, high-temperature electronics for high-power microwave applications, electronics for aerospace and automobiles, and stable passivation films for semiconductors. In addition, there is great scientific interest in the nitrides, because they appear to form the first semiconductor system in which extended defects do not severely affect the optical properties of devices. This series provides a forum for the latest research in this rapidly-changing field, offering readers a basic understanding of new developments in recent research. Series volumes feature a balance between original theoretical and experimental research in basic physics, device physics, novel materials and quantum structures, processing, and systems.
GaN and Related Materials II
by Stephen J. PeartonThe first GaN and Related Materials covered topics such as a historical survey of past research, optical electrical and microstructural characterization, theory of defects, bulk crystal growth, and performance of electronic and photonic devices. This new volume updates old research where warranted and explores new areas such as UV detectors, microw
Gac Fruit: Advances in Cultivation, Utilization, Health Benefits and Processing Technologies
by Van Anh Le Servan Ersan Chuyen V. Hoang Tien Huynh Cang H. Mai Judith Müller-Maatsch Dao T. Nguyen Sophie E. Parks Huan Phan-Tai Huu Tai Pham Ngoc T.M Ta Xuan T. TranGac fruit, Momordica cochinchinensis Spreng, is rich in nutrients such as carotenoids (particularly ß-carotene and lycopene), fatty acids, vitamin E, polyphenol compounds and flavonoids. This book provides the latest research on this fruit, from cultivation through to novel processing technologies for health products. It addresses several techniques for propagation and cultivation in order to increase the production and quality of Gac fruit, including traditionally used parts of the fruit (aril) and those whose value has not yet been maximized (peel, pulp and seed). This plant has the potential to be a high value crop, particularly as parts of the fruit can be processed into nutrient supplements and natural colorants. Currently only the aril is commercially harvested, and this presents opportunities for upcycling the rest of the fruit. As such, this book contains special emphasis on: · Improving yield and fruit quality. · Extraction methods of Gac oil rich in ß-carotene and lycopene from the aril and peel. · Encapsulation of Gac oil and applications in various food products. · Nutritional values and bioactive compounds of Gac pulp and peel. · Processing and utilization of Gac seeds. · The market for Gac target products. Practical applied technologies such as microwave drying, heat pump drying, freeze drying, ultrasound assisted extraction, supercritical CO2 extraction, encapsulation techniques are all presented. This is an essential reference text for academics, researchers and graduate students in Gac fruit cultivation, food processing, science and nutrition. Product developers in health food and health supplements will also find it valuable.
Gadd45 Stress Sensor Genes
by Dan A. Liebermann Barbara HoffmanEmerging evidence indicates that the Gadd45 family of genes play a unique and critical role as sensors of stress, including genotoxic, physiological and oncogenic stress. The stress response Gadd45 family of genes (Gadd45a, Gadd45b & Gadd45g), discovered by Dr. Liebermann and other researchers, encode for small (18 kd) nuclear/cytoplasmic proteins). These genes are rapidly induced by a wide variety of endogenous and exogenous stress stimuli. In spite of marked similarities, Gadd45 genes are regulated differently & exhibit functional diversity. Gadd45 are implicated in cell cycle arrest, DNA demethylation & repair, apoptosis, cell survival, genomic stability, inflammation, & in response to physiological and oncogenic stress. Functions of Gadd45 genes are mediated by protein-protein interactions that modulate structure/function of other cellular proteins implicated in cell cycle regulation and the response of cells to stress; these interactions vary depending upon the biological setting including cell type, developmental stage and stress/stimulus. Protein partners include cdc2/cyclinB1, p21, the p38/JNK stress induced kinase pathways, and PCNA/histones. The purpose of this book is to provide a comprehensive picture of the unique global role Gadd45 genes play as stress sensors & the molecular pathways involved.
Gadd45 Stress Sensor Genes (Advances in Experimental Medicine and Biology #1360)
by Dan A. Liebermann M. Raza ZaidiThis second edition is fully updated throughout and covers the emerging evidence that indicates that the Gadd45 family of proteins plays a unique and critical role as sensors of stress, including genotoxic, physiological, and oncogenic stress. It sheds light on the complex cellular stress response, encompassing myriad molecular pathways with a plethora of regulators and effectors.The GADD45 stress response genes encode small (18 kd) nuclear/cytoplasmic proteins. These genes are rapidly induced by a wide variety of endogenous and exogenous stress stimuli. Despite marked similarities, Gadd45 genes are regulated differentially and exhibit functional diversity. Gadd45 proteins respond to physiological and oncogenic stress, and are implicated in cell cycle arrest, DNA demethylation and repair, apoptosis, cell survival, genomic stability, and inflammation. The purpose of this book is to provide a comprehensive overview of the unique global role that Gadd45 proteins play as stress sensors and the molecular pathways involved.
Gadget Disasters: Learning from Bad Ideas (Fantastic Fails)
by Elizabeth Pagel-HoganSee some of the world's greatest gadget disasters from the palm of your hand. Find out how each gadget failed, what went wrong with its design or manufacture, and what programmers learned from their mistakes.
Gaia and Climate Change: A Theology of Gift Events
by Anne PrimavesiJames Lovelock’s Gaia theory revolutionized the understanding of our place and role in the global environment. It is now accepted that our activities over the past two hundred years have contributed to and accelerated the extreme weather events associated with climate change. The fact that those activities materialized, for the most part, from within Western Christian communities makes it imperative to assess and to change their theological climate: one characterized by routine use of violent, imperialist images of God. The basis for change explored here is that of gift events, particularly as evidenced in Jesus’s life and sayings. Its legacy of love of enemies and forgiveness offers a basis for nonviolent theological and practical approaches to our situatedness within the community of life. These are also Gaian responses, as they include foregoing a perception of ourselves as belonging to an elect group given power by God over earth’s life-support systems and over all those dependent on them, whether human or more-than-human. The degree to which we change this self-perception will determine how we affect, for good or ill, not only the givenness of the climate in future but the givenness of all future life on earth.
Gaia in Turmoil: Climate Change, Biodepletion, and Earth Ethics in an Age of Crisis
by Eileen Crist H. Bruce RinkerEssays link Gaian science to such global environmental quandaries as climate change and biodiversity destruction, providing perspectives from science, philosophy, politics, and technology. Gaian theory, which holds that Earth's physical and biological processes are inextricably bound to form a self-regulating system, is more relevant than ever in light of increasing concerns about global climate change. The Gaian paradigm of Earth as a living system, first articulated by James Lovelock and Lynn Margulis in the 1970s, has inspired a burgeoning body of researchers working across disciplines that range from physics and biology to philosophy and politics. Gaia in Turmoil reflects this disciplinary richness and intellectual diversity, with contributions (including essays by both Lovelock and Margulis) that approach the topic from a wide variety of perspectives, discussing not only Gaian science but also global environmental problems and Gaian ethics and education. Contributors focus first on the science of Gaia, considering such topics as the workings of the biosphere, the planet's water supply, and evolution; then discuss Gaian perspectives on global environmental change, including biodiversity destruction and global warming; and finally explore the influence of Gaia on environmental policy, ethics, politics, technology, economics, and education. Gaia in Turmoil breaks new ground by focusing on global ecological problems from the perspectives of Gaian science and knowledge, focusing especially on the challenges of climate change and biodiversity destruction. Contributors David Abram, Donald Aitken, Connie Barlow, J. Baird Callicott, Bruce Clarke, Eileen Crist, Tim Foresman, Stephan Harding, Barbara Harwood, Tim Lenton, Eugene Linden, Karen Litfin, James Lovelock, Lynn Margulis, Bill McKibben, Martin Ogle, H. Bruce Rinker, Mitchell Thomashow, Tyler Volk, Hywel Williams
Gaia: A New Look at Life on Earth
by James LovelockIn this classic work that continues to inspire its many readers, James Lovelock deftly explains his idea that life on earth functions as a single organism. Written for the non-scientist, Gaia is a journey through time and space in search of evidence with which to support a new and radically different model of our planet. In contrast to conventional belief that living matter is passive in the face of threats to its existence, the book explores the hypothesis that the earth's living matter-air, ocean, and land surfaces-forms a complex system that has the capacity to keep the Earth a fit place for life. Since Gaia was first published, many of Jim Lovelock's predictions have come true, and his theory has become a hotly argued topic in scientific circles. Here, in a new Preface, Lovelock outlines his present state of the debate.
Gaian Systems: Lynn Margulis, Neocybernetics, and the End of the Anthropocene (Posthumanities #60)
by Bruce ClarkeA groundbreaking look at Gaia theory&’s intersections with neocybernetic systems theory Often seen as an outlier in science, Gaia has run a long and varied course since its formulation in the 1970s by atmospheric chemist James Lovelock and microbiologist Lynn Margulis. Gaian Systems is a pioneering exploration of the dynamic and complex evolution of Gaia&’s many variants, with special attention to Margulis&’s foundational role in these developments.Bruce Clarke assesses the different dialects of systems theory brought to bear on Gaia discourse. Focusing in particular on Margulis&’s work—including multiple pieces of her unpublished Gaia correspondence—he shows how her research and that of Lovelock was concurrent and conceptually parallel with the new discourse of self-referential systems that emerged within neocybernetic systems theory. The recent Gaia writings of Donna Haraway, Isabelle Stengers, and Bruno Latour contest its cybernetic status. Clarke engages Latour on the issue of Gaia&’s systems description and extends his own systems-theoretical synthesis under what he terms &“metabiotic Gaia.&” This study illuminates current issues in neighboring theoretical conversations—from biopolitics and the immunitary paradigm to NASA astrobiology and the Anthropocene. Along the way, he points to science fiction as a vehicle of Gaian thought. Delving into many issues not previously treated in accounts of Gaia, Gaian Systems describes the history of a theory that has the potential to help us survive an environmental crisis of our own making.
Gain of Function (The MIT Press Essential Knowledge series)
by Nicholas G. EvansHow a small number of risky experiments creates many unwieldy problems for life science research.The life sciences have never been more critical to human health, wealth, and security. But with any endeavor comes risk, and the last decade has seen concerns raised about gain-of function-research in which a microbe, usually a virus, is given new properties like enhanced lethality, transmissibility, or the capability to infect new species. In 2021 the term seeped into the tabloids when a conflict between Senator Rand Paul and Dr. Anthony Fauci arose over the origins of COVID-19. In Gain of Function, Nicholas Evans—who has spent his career studying gain-of-function research—describes what this kind of research is, what it isn’t, and why a small number of scientific experiments continues to make headlines.Evans begins with a description of what gain-of-function research is in science, and what it means in government policy. He tells the story of the original papers that sparked controversy more than a decade ago, unpacking them for readers unfamiliar with virology research, and he identifies where and why policymakers and scientists alike became concerned. He then turns to the history of policies that attempt to regulate gain-of-function research, the current controversies, and the ethics of risky research. He concludes with the future of gain of function, including how debates about gain of function will influence science and public health in years to come.
Gaining Ground: The Origin and Evolution of Tetrapods (Life of the Past)
by Jennifer A. ClackAround 370 million years ago, a distant relative of a modern lungfish began a most extraordinary adventure—emerging from the water and laying claim to the land. Over the next 70 million years, this tentative beachhead had developed into a worldwide colonization by ever-increasing varieties of four-limbed creatures known as tetrapods, the ancestors of all vertebrate life on land. This new edition of Jennifer A. Clack's groundbreaking book tells the complex story of their emergence and evolution. Beginning with their closest relatives, the lobe-fin fishes such as lungfishes and coelacanths, Clack defines what a tetrapod is, describes their anatomy, and explains how they are related to other vertebrates. She looks at the Devonian environment in which they evolved, describes the known and newly discovered species, and explores the order and timing of anatomical changes that occurred during the fish-to-tetrapod transition.
Gaither's Dictionary of Scientific Quotations
by Carl C. Gaither Alma E. Cavazos-GaitherThis unprecedented collection of 27,000 quotations is the most comprehensive and carefully researched of its kind, covering all fields of science and mathematics. With this vast compendium you can readily conceptualize and embrace the written images of scientists, laymen, politicians, novelists, playwrights, and poets about humankind's scientific achievements. Approximately 9000 high-quality entries have been added to this new edition to provide a rich selection of quotations for the student, the educator, and the scientist who would like to introduce a presentation with a relevant quotation that provides perspective and historical background on his subject. Gaither's Dictionary of Scientific Quotations, Second Edition, provides the finest reference source of science quotations for all audiences. The new edition adds greater depth to the number of quotations in the various thematic arrangements and also provides new thematic categories.
Galactic Bulges
by Eija Laurikainen Reynier Peletier Dimitri GadottiThis book consists of invited reviews on Galactic Bulges written by experts in the field. A central point of the book is that, while in the standard picture of galaxy formation a significant amount of the baryonic mass is expected to reside in classical bulges, the question what is the fraction of galaxies with no classical bulges in the local Universe has remained open. The most spectacular example of a galaxy with no significant classical bulge is the Milky Way. The reviews of this book attempt to clarify the role of the various types of bulges during the mass build-up of galaxies, based on morphology, kinematics and stellar populations and connecting their properties at low and high redshifts. The observed properties are compared with the predictions of the theoretical models, accounting for the many physical processes leading to the central mass concentration and their destruction in galaxies. This book serves as an entry point for PhD students and non-specialists and as a reference work for researchers in the field.
Galactic Dynamics: Second Edition (Princeton Series in Astrophysics #13)
by James Binney Scott TremaineSince it was first published in 1987, Galactic Dynamics has become the most widely used advanced textbook on the structure and dynamics of galaxies and one of the most cited references in astrophysics. Now, in this extensively revised and updated edition, James Binney and Scott Tremaine describe the dramatic recent advances in this subject, making Galactic Dynamics the most authoritative introduction to galactic astrophysics available to advanced undergraduate students, graduate students, and researchers. Every part of the book has been thoroughly overhauled, and many sections have been completely rewritten. Many new topics are covered, including N-body simulation methods, black holes in stellar systems, linear stability and response theory, and galaxy formation in the cosmological context. Binney and Tremaine, two of the world's leading astrophysicists, use the tools of theoretical physics to describe how galaxies and other stellar systems work, succinctly and lucidly explaining theoretical principles and their applications to observational phenomena. They provide readers with an understanding of stellar dynamics at the level needed to reach the frontiers of the subject. This new edition of the classic text is the definitive introduction to the field. ? A complete revision and update of one of the most cited references in astrophysics Provides a comprehensive description of the dynamical structure and evolution of galaxies and other stellar systems Serves as both a graduate textbook and a resource for researchers Includes 20 color illustrations, 205 figures, and more than 200 problems Covers the gravitational N-body problem, hierarchical galaxy formation, galaxy mergers, dark matter, spiral structure, numerical simulations, orbits and chaos, equilibrium and stability of stellar systems, evolution of binary stars and star clusters, and much more Companion volume to Galactic Astronomy, the definitive book on the phenomenology of galaxies and star clusters