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Achieving Science with CubeSats: Thinking Inside the Box
by National Academies of Sciences Engineering MedicineSpace-based observations have transformed our understanding of Earth, its environment, the solar system and the universe at large. During past decades, driven by increasingly advanced science questions, space observatories have become more sophisticated and more complex, with costs often growing to billions of dollars. Although these kinds of ever-more-sophisticated missions will continue into the future, small satellites, ranging in mass between 500 kg to 0.1 kg, are gaining momentum as an additional means to address targeted science questions in a rapid, and possibly more affordable, manner. Within the category of small satellites, CubeSats have emerged as a space-platform defined in terms of (10 cm x 10 cm x 10 cm)- sized cubic units of approximately 1.3 kg each called “U’s.” Historically, CubeSats were developed as training projects to expose students to the challenges of real-world engineering practices and system design. Yet, their use has rapidly spread within academia, industry, and government agencies both nationally and internationally. In particular, CubeSats have caught the attention of parts of the U.S. space science community, which sees this platform, despite its inherent constraints, as a way to affordably access space and perform unique measurements of scientific value. The first science results from such CubeSats have only recently become available; however, questions remain regarding the scientific potential and technological promise of CubeSats in the future. Achieving Science with CubeSats reviews the current state of the scientific potential and technological promise of CubeSats. This report focuses on the platform’s promise to obtain high- priority science data, as defined in recent decadal surveys in astronomy and astrophysics, Earth science and applications from space, planetary science, and solar and space physics (heliophysics); the science priorities identified in the 2014 NASA Science Plan; and the potential for CubeSats to advance biology and microgravity research. It provides a list of sample science goals for CubeSats, many of which address targeted science, often in coordination with other spacecraft, or use “sacrificial,” or high-risk, orbits that lead to the demise of the satellite after critical data have been collected. Other goals relate to the use of CubeSats as constellations or swarms deploying tens to hundreds of CubeSats that function as one distributed array of measurements.
Achieving Success with the Engineering Dissertation
by Guy Gratton Petra GrattonThis book guides the student reader in preparing their dissertation or major project, including both report and presentation, and explains how to use them as a bridge to the "next big thing" - the graduate's first job, or their next degree.The dissertation is the single most important component of an engineering degree, not only carrying the most marks, but bridging from academic study to professional practice. Achieving Success with the Engineering Dissertation describes the different types of dissertation, how to pick the best project and how a student can prepare themselves to succeed with their own dissertation. The authors explain how best to plan and execute the project, including the roles of the student, supervisor and project sponsor, and what they should expect from each other. Further material includes details of competitions that can be entered with dissertation projects, presentation of data, using the dissertation in job interviews, and creating research publications.Achieving Success with the Engineering Dissertation will be of use to both undergraduate and postgraduate students in all fields of Engineering, and to their supervisors.
Achieving Sustainability: Critical Barriers and Future Perspectives
by Karen BlincoeThe book provides an assessment of whether sustainability is realizable in the current societal framework. What are the challenges and the barriers - and what are the levers necessary to meet and overcome them?Through a revision of the essence of sustainability the book provides an opportunity to understand the deeper level of the radical change that sustainability represents, and the resistance that is preventing its realization.To build the argument the sustainable development model is compared with current development theories as well as alternative solutions based on utopian models of the past. The book assesses the results that can be achieved within the current systemic framework, based on case stories. It outlines the limitations to sustainability, pointing out and defining the multiple, cross-sectoral and systemic barriers that hinder the transition.Finally, the book offers perspectives on achieving a sustainable future, encompassing the impacts from recent events including the pandemic as well as the multiple mitigation and transition initiatives undertaken globally.Brian Goodwin's QuoteLike the caterpillar that wraps itself up in its silken swaddling bands prior to its metamorphosis into a butterfly, we have wrapped ourselves in a tangled skin from which we can emerge only by going through a similarly dramatic transformation.
Achieving the Paris Climate Agreement Goals: Part 2: Science-based Target Setting for the Finance industry — Net-Zero Sectoral 1.5˚C Pathways for Real Economy Sectors
by Sven TeskeThis open access book is designed as a continuation of the editor’s 2019 book Achieving the Paris Climate Agreement Goals. This volume provides an in-depth analysis of industry sectors globally, and its purpose is to present emission reduction targets in 5-year steps (2025 to 2050) for the main twelve finance sectors per the Global Industry Classification System. This scientific analysis aims to support the United Nations Principles for Responsible Investment initiative to give sustainability guidance for the global finance industry. The industry sector pathways presented here are based on the latest global and regional 100% renewable energy and non-energy greenhouse gas Representative Concentration Pathways in order to keep climate change significantly under +1.5 C and thereby achieve the Paris Climate Agreement goals. The heart of this book is three chapters presenting the results of industry scenario modelling. These chapters cover twelve industry and service sectors as well as transportation and buildings. The specific energy demand and specific emissions are presented based on the emission accounting concept of “Scope 1, Scope 2 and Scope 3” emission pathways. This methodology has been developed to measure the climate and sustainability index for companies, and this research project expands the methodology to apply it to entire industry sectors. The results presented here are the first overall industry assessments under Scope 1, 2 and 3 from 2020 through 2050. The base for the energy pathways is the scenarios scenarios published in the previous volume. The nonenergy GHG emission scenarios, broken down to agriculture & forestry and industry, are detailed and include all major greenhouse gases and aerosols. The final section of the book presents the main conclusions of the industry pathway development work and recommendations for the finance industry and policy makers. Additionally, future qualitative future investment requirements in specific technologies and measures are presented.
Achieving the Sustainable Development Goal Against Poverty in Developing Nations: Perspective from Urban Land Titling Potentials (Sustainable Development Goals Series)
by Solomon Pelumi Akinbogun Victor Olutope Ige Colin Anthony JonesThis book investigates the role of land titling in delivering sustainable means of poverty alleviation in developing countries. Despite the huge amount spent on various anti-poverty programs annually, poverty remains a major problem. This persistent challenge necessitates a paradigm shift in which urban poverty could be alleviated in developing countries by leveraging the potential of land titling. Titling could provide the urban poor with the opportunity to use their property titles as collateral for loans, allowing individuals to invest in businesses, upgrade their homes, and lift themselves out of poverty. As a result, job creation and income generation may increase. Land titling is a simple, inexpensive, and effective means of supporting the urban poor, particularly those with small- and medium-sized enterprise (SME) initiatives. Similarly, land titling is an antidote to the limited success of property taxation in developing countries, as it provides mapped and transaction-based records. This book will help stakeholders, policymakers, and policy implementers understand and utilize the capacity of titling as a veritable means of poverty alleviation and SME development in developing nations.
Achieving the Sustainable Development Goals: Global Governance Challenges (Routledge Studies in Sustainable Development)
by Simon Dalby Susan Horton Rianne Mahon Diana ThomazThis book draws on the expertise of faculty and colleagues at the Balsillie School of International Affairs to both locate the Sustainable Development Goals (SDGs) as a contribution to the development of global government and to examine the political-institutional and financial challenges posed by the SDGs. The contributors are experts in global governance issues in a broad variety of fields ranging from health, food systems, social policy, migration and climate change. An introductory chapter sets out the broad context of the governance challenges involved, and how individual chapters contribute to the analysis. The book begins by focusing on individual SDGs, examining briefly the background to the particular goal and evaluating the opportunities and challenges (particularly governance challenges) in achieving the goal, as well as discussing how this goal relates to other SDGs. The book goes on to address the broader issues of achieving the set of goals overall, examining the novel financing mechanisms required for an enterprise of this nature, the trade-offs involved (particularly between the urgent climate agenda and the social/economic goals), the institutional arrangements designed to enable the achievement of the goals and offering a critical perspective on the enterprise as a whole. Achieving the Sustainable Development Goals makes a distinctive contribution by covering a broad range of individual goals with contributions from experts on governance in the global climate, social and economic areas as well as providing assessments of the overall project – its financial feasibility, institutional requisites, and its failures to tackle certain problems at the core. This book will be of great interest to scholars and students of international affairs, development studies and sustainable development, as well as those engaged in policymaking nationally, internationally and those working in NGOs.
Achieving the Sustainable Development Goals Through Sustainable Food Systems (Food And Health Ser.)
by Riccardo Valentini John L. Sievenpiper Marta Antonelli Katarzyna DembskaThis publication offers a systemic analysis of sustainability in the food system, taking as its framework the Sustainable Development Goals of the 2030 Agenda of the United Nations. Targeted chapters from experts in the field cover main challenges in the food system and propose methods for achieving long term sustainability. Authors focus on how sustainability can be achieved along the whole food chain and in different contexts. Timely issues such as food security, climate change and migration and sustainable agriculture are discussed in depth. The volume is unique in its multidisciplinary and multi-stakeholder approach. Chapter authors come from a variety of backgrounds, and authors include academic professors, members of CSO and other international organizations, and policy makers. This plurality allows for a nuanced analysis of sustainability goals and practices from a variety of perspectives, making the book useful to a wide range of readers working in different areas related to sustainability and food production. The book is targeted towards the academic community and practitioners in the policy, international cooperation, nutrition, geography, and social sciences fields. Professors teaching in nutrition, food technology, food sociology, geography, global economics, food systems, agriculture and agronomy, and political science and international cooperation may find this to be a useful supplemental text in their courses.
Achieving Xxcellence in Science: Role of Professional Societies in Advancing Women in Science
by Committee on Women in Science EngineeringThis report is the proceedings of a July 2002 workshop of the Committee on AXXS 2002: A Workshop for Clinical Societies to Enhance Women's Contributions to Science and their Profession. The workshop gathered representatives of clinical societies and identified ways to enhance the participation of women scientists in the clinical research workforce. This workshop was a follow-up to the AXXS 1999 conference sponsored by the Office of Research on Women's Health (ORWH) at the National Institutes of Health (NIH), which focused on how scientific societies could contribute to the enhancement of women's careers in science.
Achieving Zero Hunger in India: Challenges and Policies (India Studies in Business and Economics)
by S. Mahendra Dev A. Ganesh-Kumar Vijay Laxmi PandeyThis open access volume discloses rich set of findings and policy recommendations for India towards achieving the SDG 2.1 target of zero hunger by 2030. Through its fourteen chapters, it takes an integrated approach by examining diverse aspects of food and nutrition security through multidisciplinary lens of Agricultural Economics, Nutrition, Crop Sciences, Anthropology and Law, while being rooted in economics. The chapters reflect this diversity in disciplines in terms of the questions posed, the data sets used, and the methodologies followed. Starting from the evolution of policy response for hunger and nutrition security, the book covers aspects such gender budgeting, dietary diversity, women’s empowerment, calorie intake norms, socio-legal aspects of right to health, subjective wellbeing, bio-fortification, crop insurance and food security linkages, interdependence of public distribution system (for food security) and employment guarantee schemes especially during COVID-19 pandemic, effects of dairy dietary supplements, and so on. With its rich discussions, the book is compelling for students, researchers, policy makers, development professionals and practitioners working in areas of food and nutrition security, SDGs, in particular SDG1, SDG2 and SDG5, and sustainable food systems.
Achilles In the Quantum Universe
by Richard MorrisCenturies ago, when the ancient philosopher Zeno proposedhis famous paradox involving Achilles and the Tortoise, he struck at the heart of one of science's most enduring and intractable problems: How do we define the infinite? From then on, our greatest natural philosophers, logicians, mathematicians, and scientists, from Aristotle to Stephen Hawking, have been stymied-and driven-by infinity.Acclaimed Science writer Richard Morris guides us on a fascinating, literate and entertaining tour of the efforts made throughout history to make sense of the mind-bending concept of the infinite. In tracing this quest, Morris shows us how each new encounter with infinity drove the advancement of physics and mathematics. Along the way, we encounter such luminaries as Galileo and Newton, Tycho Brahe and Giordano Bruno, and the giants of modern physics: Planck, Einstein, Bohr, Feynmann, Hawking, and numerous others.Beginning with simple logical puzzles and progressing to the latest cosmological theories, Morris shows how these same infinity problems helped spawn such groundbreaking scientific developments as relativity and quantum mechanics. Though in many ways, the infinite is just as baffling today as it was in antiquity, contemporary scientists are probing ever deeper into the nature of our universe and catching fleeting glimpses of the infinite in ways the ancients could never have imagined.Ultimately, we see that hidden within the theoretical possibility of an infinite number of universes may lie the answers to some of humankind's most fundamental questions: Why is there something rather than nothing? Why are we here?
Achsendiagramme in der ökonomischen Bildung: Lernschwierigkeiten von Schüler*innen mit dem Preis-Mengen-Diagramm
by Jana FrankeÖkonomische Modelle werden durch bewusste Reduktion der Komplexität des Betrachteten mit dem Ziel des Erkenntnisgewinns entwickelt. Mithilfe von mathematischen Modellierungen können ökonomische Modelle exakter gefasst werden. Dieses Resultat ist ein wichtiges Werkzeug bei der Ermittlung und Darstellung von Systemzusammenhängen. Durch die Visualisierung der mathematischen Modellierungen mit dem Achsendiagramm werden abstrakte Zusammenhänge erkennbar und diskutierbar. Deshalb finden ökonomische Achsendiagramme in der Schule unter anderem als Hilfsmittel zur systematischen Betrachtung einzelner Einflussfaktoren eines komplexen Interaktionssystems, wie beispielsweise der Preisbildung auf Märkten, Einsatz. Die Visualisierung des ökonomischen Modells der Preisbildung auf Märkten mithilfe des Preis-Mengen-Diagramms kann dabei die ökonomischen Verständnisprozesse fördern, sie aber auch behindern. Inwieweit das Preis-Mengen-Diagramm somit Hilfsmittel und Hürde im Wirtschaftsunterricht darstellt, wird in diesem Buch untersucht. Dafür werden Lernschwierigkeiten von Schüler*innen beim Umgang mit und dem Wissen über die mathematische Modellierung des ökonomischen Modells der Preisbildung im vollkommenen Markt und dessen Visualisierung durch das Preis-Mengen-Diagramm identifiziert. Darauf aufbauend werden Implikationen für den Wirtschaftsunterricht abgeleitet.
Acid-Base Balance and Nitrogen Excretion in Invertebrates: Mechanisms and Strategies in Various Invertebrate Groups with Considerations of Challenges Caused by Ocean Acidification
by Dirk Weihrauch Michael O’donnellThis textbook provides a comprehensive overview on the diverse strategies invertebrate animals have developed for nitrogen excretion and maintenance of acid-base balance and summarizes the most recent findings in the field, obtained by state-of-the-art methodology. A broad range of terrestrial, freshwater and marine invertebrate groups are covered, including crustaceans, cephalopods, insects and worms. In addition the impact of current and future changes in ocean acidification on marine invertebrates due to anthropogenic CO2 release will be analyzed. The book addresses graduate students and young researchers interested in general animal physiology, comparative physiology and marine/aquatic animal physiology. Also it is an essential source for researchers dealing with the effects of increasing pCO2 levels on aquatic animals, of which the vast majority are indeed invertebrates. All chapters are peer-reviewed.
Acid-Base Diagrams
by Heike Kahlert Fritz ScholzUnderstanding acid-base equilibria made easy for students in chemistry, biochemistry, biology, environmental and earth sciences. Solving chemical problems, be it in education or in real life, often requires the understanding of the acid-base equilibria behind them. Based on many years of teaching experience, Heike Kahlert and Fritz Scholz present a powerful tool to meet such challenges. They provide a simple guide to the fundamentals and applications of acid-base diagrams, avoiding complex mathematics. This textbook is richly illustrated and has full color throughout. It offers learning features such as boxed results and a collection of formulae.
Acid Gas Extraction for Disposal and Related Topics
by Ying Wu John J. Carroll Weiyao ZhuThis is the fifth volume in a series of books focusing on natural gas engineering, focusing on the extraction and disposal of acid gas. This volume includes information for both upstream and downstream operations, including chapters on modeling, carbon capture, chemical and thermodynamic models, and much more. Written by some of the most well-known and respected chemical and process engineers working with natural gas today, the chapters in this important volume represent the most cutting-edge and state-of-the-art processes and operations being used in the field. Not available anywhere else, this volume is a must-have for any chemical engineer, chemist, or process engineer working with natural gas. There are updates of new technologies in other related areas of natural gas, in addition to the extraction and disposal of acid gas, including testing, reservoir simulations, acid gas injection, and natural gas hydrate formations. Advances in Natural Gas Engineering is an ongoing series of books meant to form the basis for the working library of any engineer working in natural gas today. Every volume is a must-have for any engineer or library.
Acid Mine Drainage: From Waste to Resources
by Geoffrey S. Simate Sehliselo NdlovuAcid mine drainage (AMD) is essentially the flow of water polluted with metals and other substances from existing/old mining areas and is considered to be one of the sources of pollution. A wide range of technologies are available for preventing AMD generation and/or treating AMD before discharge, but there is a shift towards recovery of industrially useful materials and products from AMD. Acid Mine Drainage: From Waste to Resources explores novel methods developed for the reuse and/or recovery of industrially useful materials from AMD including discussing generation, prediction, prevention, and remediation processes. It includes legislation and policy frameworks governing AMD and its environmental/health impacts. Provides a detailed overview of the mining operations and discusses the geochemical and hydrogeological context of acid mine drainage AMD formation, prediction and impact Presents a holistic approach to AMD generation, prediction, prevention, and remediation processes Presents exclusive material on reuse, recycling, and recovery of industrially useful materials from AMD Gives a detailed overview of the legislation and policy regulatory framework governing the management of AMD Analyses the effects of AMD on the environment and health This volume is aimed at researchers and professionals in metallurgical engineering, chemical engineering, environmental engineering, and mining engineering, including policy makers.
Acid Rain: Rhetoric and Reality (Routledge Revivals)
by Chris C. ParkThis title, first published in 1987, provides an authoritative account of both the science and the politics of acid rain. Chris Park places the debates surrounding acid rain in context, and examines the full implications of scientific studies and the effects of acid rain on surface waters, soils and buildings. Evidence is drawn from around the world, including an examination of the damage in Scandinavia and Germany and the effects of acid rain in the U.K. and U.S.A. A comprehensive and relevant work, this is an important guide for students of geography, environment and sustainability and energy policy.
Acid Rain
by J. RoseOriginally published in 1994 this volume includes contributions from environmental scientists, consultants and research workers. The incidence and effects of the phenomenon of acid rain in the late 1970s, 80s and early 1990s , as well as certain remedies, are discussed at length. The roles of vehicles and power stations are examined in detail and legal aspects of curbing acid rain are considered.
Acid Rain and the Rise of the Environmental Chemist in Nineteenth-Century Britain: The Life and Work of Robert Angus Smith (Science, Technology and Culture, 1700-1945)
by Peter ReedRobert Angus Smith (1817-1884) was a Scottish chemist and a leading investigator into what came to be known as 'acid rain'. This study of his working life, contextualized through discussion of his childhood, education, beliefs, family, interests and influences sheds light on the evolving understanding of sanitary science during the nineteenth century. Born in Glasgow and initially trained for a career in the Church of Scotland, Smith instead went on to study chemistry in Germany under Justus von Liebig. On his return to Manchester in the 1840s, Smith's strong Calvinist faith lead him to develop a strong concern for the insanitary environmental conditions in Manchester and other industrial towns in Britain. His appointment as Inspector of the Alkali Administration in 1863 enabled him to marry his social concerns and his work as an analytical chemist, and this book explores his role as Inspector of the Administration from its inception through battles with chemical manufacturers in the courts, to the struggle to widen and tighten the regulatory framework as other harmful chemical nuisances became known. This study of Smith’s life and work provides an important background to the way that 'chemical' came to have such negative connotations in the century before publication of Rachel Carson's Silent Spring. It also offers a fascinating insight into the changing landscape of British politics as regulation and enforcement of the chemical industries came to be seen as necessary, and is essential reading for historians of science, technology and industry in the nineteenth century, as well as environmental historians seeking background context to the twentieth-century environmental movements.
Acidic Pit Lakes: The Legacy of Coal and Metal Surface Mines (Environmental Science and Engineering)
by Bob Kleinmann Christian Wolkersdorfer Martin Schultze Walter GellerThis monograph provides an international perspective on pit lakes in post-mining landscapes, including the problem of geogenic acidification. Much has been learned during the last decade through research and practical experience on how to mitigate or remediate the environmental problems of acidic pit lakes. In the first part of the book, general scientific issues are presented in 21 contributions from the fields of geo-environmental science, water chemistry, lake physics, lake modeling, and on the peculiar biological features that occur in the extreme habitats of acidic pit lakes. Another chapter provides an overview of methods currently used to remediate acidic pit lakes and treat outflowing acidic water. The second part of the book is a collection of regional surveys of pit lake problems from three European countries and Australia, and case studies of various individual representative lakes. A final case study provides an innovative approach to assessing the economic value of new pit lakes and balancing the costs and benefits, a valuable tool for decision makers.
Acinetobacter: Microbiology, Epidemiology, Infections, Management
by E. Bergogne-Berezin Marie-Laure Joly-Guillou Kevin J. TownerAcinetobacter details the clinical aspects of this bacterium responsible for many infections in hospitalized patients. This reference explains the importance of these organisms, both from the patient's viewpoint and the economic perspective, and provides clinicians with the knowledge they need to control these bacteria.
Acinetobacter: Biology and Pathogenesis (Infectious Agents and Pathogenesis)
by Eugénie Bergogne-Bérézin Mauro Bendinelli Herman FriedmanThere is currently increasing interest concerning the biology and disease caused by Acinetobacter species. Such interest, however, developed relatively slowly because of the necessity to clarify the confusing taxonomy of these organisms. Much work was needed to identify various species as members of this genus, to recognize their epidemiologic profile, their pathogenic role and their increasing importance as multi-antibiotic resistant organisms. In recent years improvement of genetic approaches, recognition of plasmids, integrons and chromosomal sources of resistance mechanisms aroused interest on the role of Acinetobacters in disease by many microbiologists and clinicians, especially internists and infectious disease specialists. In this regard, physicians are frequently confronted with extremely difficult therapeutic approaches for treatment and prevention of severe nosocomial infections due to multi antibiotic resistant Acinetobacter. Moreover, recent observations of community acquired infections have been reported, especially in patients with various risk factors such as immuno-deficiencies. Also, it is now becoming evident that Acinetobacter infections occur frequently in violent situations such as earthquake or war zones. The mechanisms of Acinetobacter virulence are becoming increasingly clear, providing new insights into their pathogenic role in community acquired infections. It is apparent the time is appropriate for detailed review of the increasing knowledge concerning important new information, both clinical and therapeutic, especially information concerning virulence, resistance mechanisms and typing of Acinetobacter spp. Many new findings are accumulating in almost an exponential manner since publication of previous books on this subject in 1991 and 1996.
Acknowledging Indigenous Knowledge: Voices of Tropical Forest People (Urbanization, Industrialization, and the Environment)
by Purabi BoseThis book explores how the landscapes in indigenous territories are rapidly changing due to increased global industrial demand. This deforestation and urbanization have isolated the indigenous people from practicing ‘traditional ways of life.’ Portrayed in this book is the indigenous people’s perspective of their indigenous knowledge (IK) about the environment and why losing IK is a threat to humans, wildlife, and nature. Insight is shared into why acknowledging IK as a science can help solve climate change, food and nutrition insecurity, and increasing new types of pandemics through evidence‑based stories from indigenous people. Features:• Bridges the fractured space between science and nature.• Documents the perspectives of indigenous peoples about their ancestral knowledge.• Provides ethnographic qualitative comparative case studies of forest‑dwelling indigenous peoples over a 19‑year period.• Covers largely remote indigenous territories of ten tropical countries in the Global South.• Provides evidence‑based stories examining indigenous knowledge’s role in the tropics in preserving diverse landscapes and providing nature‑based solutions.
The ACL Handbook
by Martha M. Murray Patrick Vavken Braden FlemingACL injuries affect the lives of hundreds of thousands of people each year. Treatment is far from perfect, and physicians and patients face challenges such as high failure rates in adolescent athletes and the inability to slow the accelerated progression of arthritis after an ACL rupture, for example. The ACL Handbook takes a complete view of ACL injuries and treatments, discussing: - Normal ACL and knee mechanics - The body's response to ACL injury - Development of new treatment methods Ideal for orthopedists, sports medicine physicians, and physical therapists, The ACL Handbook is a unique resource for information on the basic and applied science of ACL injury, repair, and the future of treatment.
Acolytes of Nature: Defining Natural Science in Germany, 1770-1850
by Denise PhillipsAlthough many of the practical and intellectual traditions that make up modern science date back centuries, the category of “science” itself is a relative novelty. In the early eighteenth century, the modern German word that would later mean “science,” naturwissenschaft, was not even included in dictionaries. By 1850, however, the term was in use everywhere. Acolytes of Nature follows the emergence of this important new category within German-speaking Europe, tracing its rise from an insignificant eighteenth-century neologism to a defining rallying cry of modern German culture. Today’s notion of a unified natural science has been deemed an invention of the mid-nineteenth century. Yet what Denise Phillips reveals here is that the idea of naturwissenschaft acquired a prominent place in German public life several decades earlier. Phillips uncovers the evolving outlines of the category of natural science and examines why Germans of varied social station and intellectual commitments came to find this label useful. An expanding education system, an increasingly vibrant consumer culture and urban social life, the early stages of industrialization, and the emergence of a liberal political movement all fundamentally altered the world in which educated Germans lived, and also reshaped the way they classified knowledge.
Acoustic Analysis and Design of Short Elliptical End-Chamber Mufflers
by Akhilesh MimaniThis book presents a three-dimensional analysis of acoustic wave propagation in an elliptical waveguide, and applies the equations and concepts to design axially short elliptical end-chamber muffler configurations which are an important component of a complex multi-pass muffler used in a modern-day automotive exhaust system. A general solution of the Helmholtz equation in elliptical cylindrical co-ordinates is presented in terms of the Mathieu and modified Mathieu modal functions. This is followed by the tabulation and analysis, for the first time, of the non-dimensional resonance frequencies of the transverse modes of a rigid-wall elliptical waveguide for a complete range of aspect ratio. The modal shape patterns of the first few circumferential, radial and cross-modes are examined with particular attention to the pressure nodal ellipses and hyperbolae. An analytical formulation is then outlined for characterizing a single-inlet and single-outlet elliptical muffler with the inlet located on the end face and the outlet located either on the end face or side-surface. The ensuing chapter is devoted toward analyzing the Transmission Loss (TL) performance of different short end-chamber mufflers, namely (a) the straight-flow configuration having ports located on the opposite face, (b) the flow-reversal configuration with ports located on the same end face and (c) configuration with inlet port on the end face and outlet on the side surface. Design guidelines are formulated in terms of the optimal location of inlet and outlet ports which suppresses the deteriorating influence of certain higher-order modes, thereby delivering a broadband TL performance. Directions for future work are discussed toward the end. In summary, this book is a one-stop solution for a practicing automotive engineer designing mufflers, for an applied mathematician studying wave propagation in elliptical geometries, and also as a niche area within noise control engineering.