Ev nova vellos
Finally, I will address how such a theoretical formalism with Have been developing to predict the galaxy clustering in redshift Then I will present a new theoretical formalism I Necessity to develop more accurate theoretical templates for the To extract cosmological information from galaxy surveys, which implies Next I will show some issues which occur when one tries Surveys, focusing on baryon acoustic oscillations and redshift-spaceĭistortions. Observational constraints on dark energy properties from galaxy In this talk, first I will present current Traced by a galaxy survey, is considered as one of the most powerfulĬosmological tools for such a purpose because one can obtainģ-dimensional matter distribution, while CMB probes the 2-d projectionĪlong the line of sight. The large-scale structure of the Universe, which can be The cosmic expansion, is one of the most important issues inĬosmology. Probing the nature of dark energy, which drives the acceleration of Climate change is a problem that affects all segments of society, and it cannot be solved without the cooperation of important stakeholders, in particular, the current suppliers of world primary energy (in descending order of market share in 2012): fossil fuels (81.7%), biofuels (10.0%), nuclear power (4.8%), hydropower (2.4%), and wind/solar/geothermal (1.1%).įast imaging with ALMA : from CASA to GILDAS However, we also need to appreciate that the needed changes from business as usual are not only in scientific approach, but must deal with economic, political, and social realities. A subtext of the talk is that astrophysicists with a training in systems-thinking can bring unique technical insights to the challenges of climate-change mitigation and energy transformation. An important difference is that engineering solutions can avoid evolution away from the so-called zero-age main-sequence. We argue how a spherical reactor can be understood in terms of astrophysical principles that govern the equation of state of the matter, mechanical structure, energy generation (with fission replacing fusion), and heat transport inside stars. We focus on one design – a two-fluid molten salt breeder reactor that uses the thorium fuel cycle – that has all four attributes, as well as a pathway to convert smoothly from our current unsustainable dependence on light-water reactors that use the once-through uranium fuel cycle. (4) superior in competitive cost relative to other alternatives.
(3) secure in terms of weapons proliferation, (2) sustainable in terms of meeting future energy demand for several centuries as well as having an acceptable solution for nuclear waste disposal, We argue that the scale of the transformation needed to mitigate climate change requires breakthroughs in current technologies, most importantly, in new forms of fission reactors that are Climate change is real, here, and potentially catastrophic in its effect.