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  • Physics
  • thema EDItEUR::P Mathematics and Science::PS Biology, life sciences::PSA Life sciences: general issues::PSAN Neurosciences
  • RAND Corporation  (22)
  • Logos Verlag Berlin  (10)
  • The MIT Press  (8)
  • English  (40)
  • 2020-2024  (40)
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  • 2020-2024  (40)
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  • 1
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    Energy-Sector Workforce Development in Southwestern Pennsylvania (2023)
    RAND Corporation
    Details
    Publication Date: 2023-10-05
    Description: This report documents key technological innovations in the energy sector; identifies best practices of educational and training programs that have successfully responded to evolving labor markets in other sectors; analyzes four case-study energy-sector education and training programs in southwestern Pennsylvania; and provides recommendations for the energy-sector education and training system in the region.
    Keywords: Physics ; History ; Education ; Business ; bic Book Industry Communication::K Economics, finance, business & management::KJ Business & management::KJM Management & management techniques::KJMV Management of specific areas::KJMV2 Personnel & human resources management ; bic Book Industry Communication::J Society & social sciences::JN Education::JNM Higher & further education, tertiary education ; bic Book Industry Communication::H Humanities::HB History::HBJ Regional & national history::HBJK History of the Americas ; bic Book Industry Communication::P Mathematics & science::PH Physics::PHD Classical mechanics::PHDY Energy
    Language: English
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  • 2
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    Fast Measurement of Individual Head-Related Transfer Functions (2022)
    Logos Verlag Berlin | Logos Verlag Berlin
    Details
    Publication Date: 2024-04-11
    Description: While binaural technology applications gained in popularity in recent years, the majority of applications still use non-individual Head-Related Transfer Functions (HRTFs) from artificial heads. However, certain applications, for example research of spatial hearing or hearing attention, require an physically exact and realistic binaural signal. The limiting factor that prohibits the widespread use of individual HRTFs is the acquisition time of such data. This time requirement has recently been reduced by the use of parallelization in the measurement signal which lead to the development of fast measurement systems capable of acquiring individual and spatially dense HRTF. This thesis provides a objective and subjective evaluation of such a system that is designed with the goal of little disturbance of the measurements in mind. The construction is detailed, followed by both an objective and subjective evaluation. A detailed investigation into additional distortion of the sound field introduced by the system itself is presented and it is shown that the system performs comparably to a conventional system in terms of sound source localization. Furthermore, a method is introduced and evaluated to further reduce the measurement time by using continuous rotation during the measurement. This method is used to reduced the measurement duration from eight minutes to three minutes without audible differences.
    Keywords: Technology & Engineering ; Electronics ; Science ; Physics ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TJ Electronics and communications engineering::TJF Electronics engineering ; thema EDItEUR::P Mathematics and Science::PH Physics
    Language: English
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  • 3
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    CBD (2022)
    The MIT Press
    Details
    Publication Date: 2024-04-14
    Description: A comprehensive review of the scientific literature on the possible benefits of CBD, describing findings from both preclinical and human clinical studies. CBD (cannabidiol), a nonintoxicating compound derived from the cannabis plant, can be found in products ranging from lotion and smoothies to chewable gummies and pet treats. It's been promoted—but not always scientifically validated—as a treatment for medical conditions including psychosis, anxiety, pain, and even cancer. In this book, three leading cannabis researchers look at the science of CBD, offering a comprehensive review of the scientific literature on the possible benefits of CBD and describing their findings from both preclinical and human clinical studies. As it turns out, the current CBD fad has some basis in preclinical animal research that indicates potential beneficial effects. Clinical studies, hampered by regulations governing research with cannabis, have lagged behind the basic animal research. The authors examine what research shows about chemical and pharmacological aspects of CBD and CBD's interaction with THC, the main psychotropic compound found in cannabis. They go on to review the current state of knowledge about CBD's effectiveness in treating epilepsy, cancer, nausea, pain, anxiety, PTSD, depression, sleep disorders, psychosis, and addiction.
    Keywords: CBD;treatment;therapy;oil;pain;anxiety;neuroprotection;cancer;addiction;cannabis;PTSD ; thema EDItEUR::V Health, Relationships and Personal development::VX Mind, body, spirit::VXH Complementary therapies, healing and health::VXHT Traditional medicine and herbal remedies ; thema EDItEUR::P Mathematics and Science::PS Biology, life sciences::PSA Life sciences: general issues::PSAN Neurosciences
    Language: English
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  • 4
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    Modellierung des Fachwissens von Lehrkräften in der Teilchenphysik (Volume 315) (2022)
    Logos Verlag Berlin | Logos Verlag Berlin
    Details
    Publication Date: 2024-04-04
    Description: Die Teilchenphysik als Teilgebiet der modernen Physik gewinnt zunehmend an Bedeutung im schulischen Physikunterricht. In dieser Arbeit wird erstmalig das von Lehrkräften benötigte Fachwissen zur Teilchenphysik modelliert, wobei Fachwissen als ein Teil des Professionswissens verstanden wird. Als Fachwissensdimensionen werden die Inhaltsbereiche und die Wissensarten in den Fokus genommen, für welche jeweils Subfacetten identifiziert und präzise beschrieben werden. Nach einem überblick über die wesentlichen Ideen der Teilchenphysik wird in der Arbeit die sukzessive Modellierung des Fachwissens im Rahmen einer qualitativ und quantitativ angelegten Delphi-Studie vorgestellt. In drei Befragungsrunden wurden zwischen 35 und 65 internationale Expertinnen und Experten aus der teilchenphysikbezogenen Forschung (Fachwissenschaft und Fachdidaktik) und öffentlichkeitsarbeit (u.a. Wissenschaftsjournalismus) sowie erfahrene Lehrkräfte zu den für das Fachwissen relevanten Themen der Teilchenphysik befragt. Empirische Analysen der Befragungsrunden ergaben, dass sich die Dimension Inhaltsbereiche im deklarativen Wissen aus zehn teilchenphysikalischen Themen (z.B. Teilchen in der Hochenergiephysik, die vier fundamentalen Wechselwirkungen) zusammensetzt, von welchen sechs als besonders relevant eingeschätzt wurden. Im Anschluss an die letzte Befragungsrunde wurde theoriegeleitet eine erste Modellierung der Inhaltsbereiche für die Wissensarten des prozeduralen und konditionalen Wissens vorgenommen.
    Keywords: Science ; Education ; Science ; Physics ; thema EDItEUR::P Mathematics and Science::PD Science: general issues ; thema EDItEUR::J Society and Social Sciences::JN Education ; thema EDItEUR::P Mathematics and Science::PH Physics
    Language: English
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  • 5
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    Energy Services Analysis (2023)
    RAND Corporation
    Details
    Publication Date: 2024-04-04
    Description: Most environmental analyses focus on changing existing processes to use less energy and produce fewer emissions. This report uses energy service analysis (ESA) to examine possibilities for instead changing how a service is delivered. The ESA framework is used to analyze how changes in the provision of two services—news delivery and personal mobility—might reduce greenhouse-gas emissions and suggests other areas in which ESA could be applied.
    Keywords: Political Science ; Physics ; Technology ; Transportation Studies ; bic Book Industry Communication::P Mathematics & science::PH Physics::PHD Classical mechanics::PHDY Energy ; bic Book Industry Communication::R Earth sciences, geography, environment, planning::RB Earth sciences::RBP Meteorology & climatology ; bic Book Industry Communication::W Lifestyle, sport & leisure::WG Transport: general interest::WGC Road & motor vehicles: general interest::WGCF Buses, trams & commercial vehicles: general interest ; thema EDItEUR::P Mathematics and Science::PH Physics::PHD Classical mechanics::PHDY Energy ; thema EDItEUR::R Earth Sciences, Geography, Environment, Planning::RB Earth sciences::RBP Meteorology and climatology ; thema EDItEUR::W Lifestyle, Hobbies and Leisure::WG Transport: general interest::WGC Road and motor vehicles: general interest::WGCF Buses, trams and commercial vehicles: general interest
    Language: English
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  • 6
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    Dynamic iteration and model order reduction for magneto-quasistatic systems (2022)
    Logos Verlag Berlin | Logos Verlag Berlin
    Details
    Publication Date: 2024-04-11
    Description: Our world today is becoming increasingly complex, and technical devices are getting ever smaller and more powerful. The high density of electronic components together with high clock frequencies leads to unwanted side-effects like crosstalk, delayed signals and substrate noise, which are no longer negligible in chip design and can only insufficiently be represented by simple lumped circuit models. As a result, different physical phenomena have to be taken into consideration since they have an increasing influence on the signal propagation in integrated circuits. Computer-based simulation methods play thereby a key role. The modelling and analysis of complex multi-physics problems typically leads to coupled systems of partial differential equations and differential-algebraic equations (DAEs). Dynamic iteration and model order reduction are two numerical tools for efficient and fast simulation of coupled systems. Formodelling of low frequency electromagnetic field, we use magneto-quasistatic (MQS) systems which can be considered as an approximation to Maxwells equations. A spatial discretization by using the finite element method leads to a DAE system. We analyze the structural and physical properties of this system and develop passivity-preserving model reduction methods. A special block structure of the MQS model is exploited to to improve the performance of the model reduction algorithms.
    Keywords: Technology & Engineering ; Electronics ; Mathematics ; Science ; Physics ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TJ Electronics and communications engineering::TJF Electronics engineering ; thema EDItEUR::P Mathematics and Science::PB Mathematics ; thema EDItEUR::P Mathematics and Science::PH Physics
    Language: English
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  • 7
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    Addressing Climate Change in Local Water Agency Plans (2023)
    RAND Corporation
    Details
    Publication Date: 2024-03-29
    Description: This report describes an approach for planning under deep uncertainty, Robust Decision Making (RDM), and demonstrates its use by the El Dorado Irrigation District (EID). Using RDM, the authors and EID tested the robustness of current long-term water management plans and more robust alternatives across more than 50 futures reflecting different assumptions about future climate, urban growth, and the availability of important new supplies.
    Keywords: Political Science ; Physics ; thema EDItEUR::J Society and Social Sciences::JP Politics and government::JPV Political control and freedoms ; thema EDItEUR::R Earth Sciences, Geography, Environment, Planning::RN The environment::RND Environmental policy and protocols ; thema EDItEUR::R Earth Sciences, Geography, Environment, Planning::RB Earth sciences::RBP Meteorology and climatology
    Language: English
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  • 8
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    Current and Future Exposure of Infrastructure in the United States to Natural Hazards (2023)
    RAND Corporation
    Details
    Publication Date: 2024-03-30
    Description: Communities, companies, and governments at all levels in the United States are making decisions that will influence where, what and how infrastructure will be built. This report describes insights about exposures from natural hazards now and in the future, as well as gaps in data that, if filled, could improve the nation’s ability to assess infrastructure risk and improve infrastructure resilience.
    Keywords: Business ; Physics ; Population Studies ; thema EDItEUR::K Economics, Finance, Business and Management::KC Economics::KCS Economic systems and structures ; thema EDItEUR::R Earth Sciences, Geography, Environment, Planning::RB Earth sciences::RBP Meteorology and climatology ; thema EDItEUR::J Society and Social Sciences::JH Sociology and anthropology::JHB Sociology::JHBD Population and demography
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  • 9
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    Study of an alternative phase field model for low interfacial energy in elastic solids (2022)
    Logos Verlag Berlin | Logos Verlag Berlin
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    Publication Date: 2024-04-05
    Description: In 2005, the hybrid model was published by Prof. H.-D. Alber and Prof. P. Zhu as an alternative to the Allen-Cahn model for the description of phase field transformations. With low interfacial energy, it is more efficient, since the resolution of the diffuse interface is numerically broader for the same solution accuracy and allows coarser meshing. The solutions of both models are associated with energy minimisation and in this work the error terms introduced in the earlier publications are discussed and documented using one and two dimensional numerical simulations. In the last part of this book, phase field problems, initially not coupled with material equations, are combined with linear elasticity and, after simple introductory examples, a growing martensitic inclusion is simulated and compared with literature data. In addition to the confirmed numerical advantage, another phenomenon not previously described in the literature is found: with the hybrid model, in contrast to the examples calculated with the Allen-Cahn model, an inclusion driven mainly by curvature energy does not disappear completely. The opposite problem prevents inclusions from growing from very small initial configurations, but this fact can be remedied by a very finely chosen diffuse interface width and by analysing and adjusting the terms that generate the modelling errors. The last example shows that the hybrid model can be used with numerical advantages despite the above mentioned peculiarities.
    Keywords: Science ; Chemistry ; Mathematics ; Science ; Physics ; thema EDItEUR::P Mathematics and Science::PN Chemistry ; thema EDItEUR::P Mathematics and Science::PB Mathematics ; thema EDItEUR::P Mathematics and Science::PH Physics
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  • 10
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    Active Inference (2022)
    The MIT Press | The MIT Press
    Details
    Publication Date: 2024-04-05
    Description: The first comprehensive treatment of active inference, an integrative perspective on brain, cognition, and behavior used across multiple disciplines. Active inference is a way of understanding sentient behavior—a theory that characterizes perception, planning, and action in terms of probabilistic inference. Developed by theoretical neuroscientist Karl Friston over years of groundbreaking research, active inference provides an integrated perspective on brain, cognition, and behavior that is increasingly used across multiple disciplines including neuroscience, psychology, and philosophy. Active inference puts the action into perception. This book offers the first comprehensive treatment of active inference, covering theory, applications, and cognitive domains. Active inference is a “first principles” approach to understanding behavior and the brain, framed in terms of a single imperative to minimize free energy. The book emphasizes the implications of the free energy principle for understanding how the brain works. It first introduces active inference both conceptually and formally, contextualizing it within current theories of cognition. It then provides specific examples of computational models that use active inference to explain such cognitive phenomena as perception, attention, memory, and planning.
    Keywords: Active Inference ; free energy ; predictive coding ; Bayesian inference ; predictive processing ; planning as inference ; active sensing ; hypothesis testing ; behavior ; theoretical neurobiology ; brain ; computational neuroscience ; perception ; planning ; action ; control. ; thema EDItEUR::P Mathematics and Science::PS Biology, life sciences::PSA Life sciences: general issues::PSAN Neurosciences ; thema EDItEUR::Q Philosophy and Religion::QD Philosophy::QDT Topics in philosophy::QDTM Philosophy of mind
    Language: English
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