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National Geographic science of everything : how things work in our world : from cell phones, soap bubbles & vaccines to GPS, x-rays & submarines
\"This book explains the science behind all the machines, gadgets, systems, and processes we take for granted. The perfect book for techies--young or old, male or female--who read Popular Science and Wired or watch \"How It Works\" and \"How It's Made.\"
Book
Powerless science?
In spite of decades of research on toxicants, along with the growing role of scientific expertise in public policy and the unprecedented rise in the number of national and international institutions dealing with environmental health issues, problems surrounding contaminants and their effects on health have never appeared so important, sometimes to the point of appearing insurmountable. This calls for a reconsideration of the roles of scientific knowledge and expertise in the definition and management of toxic issues, which this book seeks to do. It looks at complex historical, social, and political dynamics, made up of public controversies, environmental and health crises, economic interests, and political responses, and demonstrates how and to what extent scientific knowledge about toxicants has been caught between scientific, economic, and political imperatives.
eBook
Taking the metabolic pulse of the world’s coral reefs
Worldwide, coral reef ecosystems are experiencing increasing pressure from a variety of anthropogenic perturbations including ocean warming and acidification, increased sedimentation, eutrophication, and overfishing, which could shift reefs to a condition of net calcium carbonate (CaCO3) dissolution and erosion. Herein, we determine the net calcification potential and the relative balance of net organic carbon metabolism (net community production; NCP) and net inorganic carbon metabolism (net community calcification; NCC) within 23 coral reef locations across the globe. In light of these results, we consider the suitability of using these two metrics developed from total alkalinity (TA) and dissolved inorganic carbon (DIC) measurements collected on different spatiotemporal scales to monitor coral reef biogeochemistry under anthropogenic change. All reefs in this study were net calcifying for the majority of observations as inferred from alkalinity depletion relative to offshore, although occasional observations of net dissolution occurred at most locations. However, reefs with lower net calcification potential (i.e., lower TA depletion) could shift towards net dissolution sooner than reefs with a higher potential. The percent influence of organic carbon fluxes on total changes in dissolved inorganic carbon (DIC) (i.e., NCP compared to the sum of NCP and NCC) ranged from 32% to 88% and reflected inherent biogeochemical differences between reefs. Reefs with the largest relative percentage of NCP experienced the largest variability in seawater pH for a given change in DIC, which is directly related to the reefs ability to elevate or suppress local pH relative to the open ocean. This work highlights the value of measuring coral reef carbonate chemistry when evaluating their susceptibility to ongoing global environmental change and offers a baseline from which to guide future conservation efforts aimed at preserving these valuable ecosystems.
Journal Article
The tree of knowledge : the bright and the dark sides of science
This text traces the history of science and details two divergent futures: one in which science accelerates the downfall of Homo sapiens and another in which it helps our species engage in a new and positive adventure, whose outcome nobody can know.
Book
Organic phosphorus in the terrestrial environment: a perspective on the state of the art and future priorities
Background The dynamics of phosphorus (P) in the environment is important for regulating nutrient cycles in natural and managed ecosystems and an integral part in assessing biological resilience against environmental change. Organic P (Po) compounds play key roles in biological and ecosystems function in the terrestrial environment being critical to cell function, growth and reproduction. Scope We asked a group of experts to consider the global issues associated with Po in the terrestrial environment, methodological strengths and weaknesses, benefits to be gained from understanding the Po cycle, and to set priorities for Po research. Conclusions We identified seven key opportunities for Po research including: the need for integrated, quality controlled and functionally based methodologies; assessment of stoichiometry with other elements in organic matter; understanding the dynamics of Po in natural and managed systems; the role of microorganisms in controlling Po cycles; the implications of nanoparticles in the environment and the need for better modelling and communication of the research. Each priority is discussed and a statement of intent for the Po research community is made that highlights there are key contributions to be made toward understanding biogeochemical cycles, dynamics and function of natural ecosystems and the management of agricultural systems.
Journal Article
Unbelievable science : stuff that will blow your mind
\"From space to technology, the natural world to health and well-being, this fascinating book introduces you to the science behind today's most interesting headlines\"--Back cover.
Book
Designs on nature
Biology and politics have converged today across much of the industrialized world. Debates about genetically modified organisms, cloning, stem cells, animal patenting, and new reproductive technologies crowd media headlines and policy agendas. Less noticed, but no less important, are the rifts that have appeared among leading Western nations about the right way to govern innovation in genetics and biotechnology. These significant differences in law and policy, and in ethical analysis, may in a globalizing world act as obstacles to free trade, scientific inquiry, and shared understandings of human dignity.
In this magisterial look at some twenty-five years of scientific and social development, Sheila Jasanoff compares the politics and policy of the life sciences in Britain, Germany, the United States, and in the European Union as a whole. She shows how public and private actors in each setting evaluated new manifestations of biotechnology and tried to reassure themselves about their safety.
Three main themes emerge. First, core concepts of democratic theory, such as citizenship, deliberation, and accountability, cannot be understood satisfactorily without taking on board the politics of science and technology. Second, in all three countries, policies for the life sciences have been incorporated into \"nation-building\" projects that seek to reimagine what the nation stands for. Third, political culture influences democratic politics, and it works through the institutionalized ways in which citizens understand and evaluate public knowledge. These three aspects of contemporary politics, Jasanoff argues, help account not only for policy divergences but also for the perceived legitimacy of state actions.
eBook
Timelines of science
\"Follow the story of science year by year with [an] ... illustrated timeline with ... explanations of key scientific theories and concepts; identify the influential thinkers behind revolutionary breakthroughs and discover how they changed the world; trace the development of landmark innovations such as the measurement of time, computers, and mobile communication; see major advances and achievements in their broader context\"-- Provided by publisher.
Book
Process-evaluation of tropospheric humidity simulated by general circulation models using water vapor isotopologues: 1. Comparison between models and observations
The goal of this study is to determine how H2O and HDO measurements in water vapor can be used to detect and diagnose biases in the representation of processes controlling tropospheric humidity in atmospheric general circulation models (GCMs). We analyze a large number of isotopic data sets (four satellite, sixteen ground‐based remote‐sensing, five surface in situ and three aircraft data sets) that are sensitive to different altitudes throughout the free troposphere. Despite significant differences between data sets, we identify some observed HDO/H2O characteristics that are robust across data sets and that can be used to evaluate models. We evaluate the isotopic GCM LMDZ, accounting for the effects of spatiotemporal sampling and instrument sensitivity. We find that LMDZ reproduces the spatial patterns in the lower and mid troposphere remarkably well. However, it underestimates the amplitude of seasonal variations in isotopic composition at all levels in the subtropics and in midlatitudes, and this bias is consistent across all data sets. LMDZ also underestimates the observed meridional isotopic gradient and the contrast between dry and convective tropical regions compared to satellite data sets. Comparison with six other isotope‐enabled GCMs from the SWING2 project shows that biases exhibited by LMDZ are common to all models. The SWING2 GCMs show a very large spread in isotopic behavior that is not obviously related to that of humidity, suggesting water vapor isotopic measurements could be used to expose model shortcomings. In a companion paper, the isotopic differences between models are interpreted in terms of biases in the representation of processes controlling humidity. Key Points Isotopic evaluation with in situ, satellite, ground‐based remote‐sensing data Consistent features and model‐data differences across data sets Isotopic GCMs share common biases
Journal Article