Timescales

The ongoing ecological crisis brings the longer timescales of the planet into view, a history that began without us and will long outlast us. William Connolly warns that to attribute disruptive forces only to human agency or to treat ...

Author: Bethany Wiggin

Publisher: U of Minnesota Press

ISBN: 9781452963686

Category: Science

Page: 232

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Humanists, scientists, and artists collaborate to address the disjunctive temporalities of ecological crisis In 2016, Antarctica’s Totten Glacier, formed some 34 million years ago, detached from its bedrock, melted from the bottom by warming ocean waters. For the editors of Timescales, this event captures the disjunctive temporalities of our era’s—the Anthropocene’s—ecological crises: the rapid and accelerating degradation of our planet’s life-supporting environment established slowly over millennia. They contend that, to represent and respond to these crises (i.e., climate change, rising sea levels, ocean acidification, species extinction, and biodiversity loss) requires reframing time itself, making more visible the relationship between past, present, and future, and between a human life span and the planet’s. Timescales’ collection of lively and thought-provoking essays puts oceanographers, geophysicists, geologists, and anthropologists into conversation with literary scholars, art historians, and archaeologists. Together forging new intellectual spaces, they explore the relationship between geological deep time and historical particularity, between ecological crises and cultural expression, between environmental policy and social constructions, between restoration ecology and future imaginaries, and between constructive pessimism and radical (and actionable) hope. Interspersed among these essays are three complementary “etudes,” in which artists describe experimental works that explore the various timescales of ecological crisis. Contributors: Jason Bell, Harvard Law School; Iemanjá Brown, College of Wooster; Beatriz Cortez, California State U, Northridge; Wai Chee Dimock, Yale U; Jane E. Dmochowski, U of Pennsylvania; David A. D. Evans, Yale U; Kate Farquhar; Marcia Ferguson, U of Pennsylvania; Ömür Harmanşah, U of Illinois at Chicago; Troy Herion; Mimi Lien; Mary Mattingly; Paul Mitchell, U of Pennsylvania; Frank Pavia, California Institute of Technology; Dan Rothenberg; Jennifer E. Telesca, Pratt Institute; Charles M. Tung, Seattle U.

Timescales and Environmental Change

THE LATE QUATERNARY TIME-SCALE Late Quaternary time-scales are most prevalent in models of explanation in the natural and physical sciences; physical geographers are very comfortable thinking about environmental change over these ...

Author: Graham Chapman

Publisher: Routledge

ISBN: 9781134787548

Category: Social Science

Page: 288

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Time is an unstated but ever present element in all debates about environmental change - and the subtext of many disagreements. Geomorphologists think in the context of millions of years, politicians in election terms, the media in decades, and the public ceases to worry about global warming with one bad summer. This volume brings together experts from a diverse range of disciplines, to offer a range of both temporal and geographical perspectives. It does not seek to provide clear answers about right time-scales, but rather to encourage the reader, from whatever perspective, to think about change and environmental issues in a new light through different time-scales.

An Introduction to Markov State Models and Their Application to Long Timescale Molecular Simulation

(a) Results for the 3×3 count ma4.7 Validation 1: Implied Timescales One of the most interesting kinetic properties of molecular ... with each component representing a different relaxation timescale of the overall system [3, 6, 12, 14].

Author: Gregory R. Bowman

Publisher: Springer Science & Business Media

ISBN: 9789400776067

Category: Science

Page: 139

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The aim of this book volume is to explain the importance of Markov state models to molecular simulation, how they work, and how they can be applied to a range of problems. The Markov state model (MSM) approach aims to address two key challenges of molecular simulation: 1) How to reach long timescales using short simulations of detailed molecular models. 2) How to systematically gain insight from the resulting sea of data. MSMs do this by providing a compact representation of the vast conformational space available to biomolecules by decomposing it into states sets of rapidly interconverting conformations and the rates of transitioning between states. This kinetic definition allows one to easily vary the temporal and spatial resolution of an MSM from high-resolution models capable of quantitative agreement with (or prediction of) experiment to low-resolution models that facilitate understanding. Additionally, MSMs facilitate the calculation of quantities that are difficult to obtain from more direct MD analyses, such as the ensemble of transition pathways. This book introduces the mathematical foundations of Markov models, how they can be used to analyze simulations and drive efficient simulations, and some of the insights these models have yielded in a variety of applications of molecular simulation.

Australian Phanerozoic Timescales

FOREWORD This second series of Timescales Calibration and Development Correlation Charts and Explanatory Notes revises that originally entitled Australian Phanerozoic Timescales which was published as Bureau of Mineral Resources Records ...

Author:

Publisher:

ISBN: PSU:000025013610

Category: Paleontology

Page:

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The Handling of Timescales in Assessing Post closure Safety of Deep Geological Repositories

decay of long - lived radionuclides might imply timescales of the order of 100s of 1 000s of years . Consideration of the decay of , say , plutonium over ten half - lives would be consistent with this approach giving a timescale of ...

Author: OECD Nuclear Energy Agency

Publisher: OECD Publishing

ISBN: UOM:39015056692141

Category: Electronic books

Page: 224

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Deep geological repositories are sited and designed to protect humans and the environment from the hazards associated with radioactive waste. A repository safety case needs to address the period fro which it is possible to contain the radioactivity. Furthermore, safety is usually assessed in terms of the primary indicators of dose and risk and, in order to evaluate these indicators, assumptions must be regarding rhe habits of potentially exposed groups (e.g. diet, lifestyle and land use) and these may change over timescales of just a few years. The need to deal with such a wide range fo timescales gives rise to a range of issues regarding the methods and presentation of safety assessements. The main objective of the workshop was to identify and discuss approaches related to, and work done on, the timescales issue within national radioactive waste management programmes in the context of assessing post-closure safety. The proceedings include the presentations made as well as a summary of the discussions held.

Progress in Scale Modeling

Reaction rate timescale, t9 Production rate timescale, t10 ≡ ≡ 1 ki 1 ̇m i (32) (33) The case study of a mammalian cell with the properties listed in Table 1 results in timescales listed in Table 4 where the timescale associated with ...

Author: Kozo Saito

Publisher: Springer Science & Business Media

ISBN: 9781402086823

Category: Technology & Engineering

Page: 508

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Scale modeling can play an important role in R&D. When engineers receive some ideas in new product development, they can test how the new design looks by bui- ing scale models and they can get an actual feeling with the prototype through their imagination. Professor Emori often said: “When children play with a toy airplane, their mind is wondering about the prototype airplane which they haven’t ridden. ” Children can use the scale model airplane as a means to enter into an imagi- tive world of wonder by testing in their own way how the actual airplane might function, how the actual airplane can maneuver aerodynamically, what might be the actual sound of a jet engine, how to safely land the actual airplane, and so on. This imagination that scale models can provide for children will help them later develop professional intuition. Physical scale models can never be entirely succe- fully replaced by computer screens where virtual models are displayed and fancy functions are demonstrated. Not only children but also adults can learn things by actually touching things only offered by physical models, helping all of us develop imagination and feeling eventually leading toward Kufu. Einstein’s famous “thought experiments [11],” which helped him to restructure modern physics may possibly and effectively be taught by letting researchers play with scale models!? References 1. I. Emori, K. Saito, and K. Sekimoto, Mokei Jikken no Riron to Ouyou (Scale Models in Engineering: Its Theory and Application), Gihodo, Tokyo, Third Edition, 2000.

Discrete Biochronological Time Scales

Several quantitative methods designed to elaborate relative timescales based on fossils have been published during the last decades. The most popular techniques at the moment are those based on a statistical-probabilistic approach, ...

Author: Jean Guex

Publisher: Springer

ISBN: 9783319213262

Category: Science

Page: 160

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The object of this book is to explain how to create a synthesis of complex biostratigraphic data, and how to extract from such a synthesis a relative time scale based exclusively on the fossil content of sedimentary rocks. Such a time scale can be used to attribute relative ages to isolated fossil-bearing samples. The book is composed of 10 chapters together with several appendices. It is a totally revised version of “Biochronological Correlations” published in 1991 and includes various new chapters. The book offers a solution for the theoretical problem of how fossils can be used to make reliable quantitative stratigraphic correlations in sedimentary geology. It also describes the use of highly efficient software along with several examples. The authors compare their theoretical model with 2 other relevant studies: probabilistic stratigraphy and constrained optimization (CONOP).

Advances in Artificial Life

Timescale and Stability in Adaptive Behaviour Christopher L. Buckley, Seth Bullock, and Netta Cohen School of Computing, University of ... there has been growing interest in the interplay of multiple timescales within neural systems.

Author: Mathieu Capcarrere

Publisher: Springer

ISBN: 9783540318163

Category: Computers

Page: 949

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TheArti?cialLifetermappearedmorethan20yearsagoinasmallcornerofNew Mexico, USA. Since then the area has developed dramatically, many researchers joining enthusiastically and research groups sprouting everywhere. This frenetic activity led to the emergence of several strands that are now established ?elds in themselves. We are now reaching a stage that one may describe as maturer: with more rigour, more benchmarks, more results, more stringent acceptance criteria, more applications, in brief, more sound science. This, which is the n- ural path of all new areas, comes at a price, however. A certain enthusiasm, a certain adventurousness from the early years is fading and may have been lost on the way. The ?eld has become more reasonable. To counterbalance this and to encourage lively discussions, a conceptual track, where papers were judged on criteria like importance and/or novelty of the concepts proposed rather than the experimental/theoretical results, has been introduced this year. A conference on a theme as broad as Arti?cial Life is bound to be very - verse,but a few tendencies emerged. First, ?elds like ‘Robotics and Autonomous Agents’ or ‘Evolutionary Computation’ are still extremely active and keep on bringing a wealth of results to the A-Life community. Even there, however, new tendencies appear, like collective robotics, and more speci?cally self-assembling robotics, which represent now a large subsection. Second, new areas appear.

Bridging the Time Scales

Severe difficulties are encountered in the form of a huge disparity between typically accessible simulation timescales and those on which the phenomena of interest occur. The manner in which this time scale ”gap” is manifest differs ...

Author: Peter Nielaba

Publisher: Springer Science & Business Media

ISBN: 9783540458371

Category: Science

Page: 502

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The behaviour of many complex materials extends over time- and lengthscales well beyond those that can normally be described using standard molecular dynamics or Monte Carlo simulation techniques. As progress is coming more through refined simulation methods than from increased computer power, this volume is intended as both an introduction and a review of all relevant modern methods that will shape molecular simulation in the forthcoming decade. Written as a set of tutorial reviews, the book will be of use to specialists and nonspecialists alike.