“…Pero, ¿cuándo llegaron los primeros ocupantes del solar peninsular? A partir del estudio de las líneas de costa del Estrecho de Gibraltar, se explicará como un grupo de "Ergaster" pudo llegar hace 1.8 Ma hasta la Península Ibérica a través de una lengua de tierra formada en plana glaciación "Donau". …”

“…Tras el escándalo desatado por su obra anterior, La invención del pueblo judío, el historiador israelí Shlomo Sand examina ahora esa enigmática tierra sagrada que se ha convertido en el solar donde acontece la lucha nacional más longeva de la modernidad. …”
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“…Escenas de proyección toma los instrumentos proyectivos de larevolución científica -desde el telescopio de proyección y la cámaraoscura, hasta la luz solar y el microscopio- para demostrar que laescena es un complejo dispositivo de poder que produce su propiosujeto. …”

“…At the same time, further advances in space science will allow humans to explore the solar system and beyond with robots and AI. But there is no "Plan B" for Earth--no viable alternative within reach if we do not care for our home planet. …”

“…The required hydrogen can be produced from gas (natural gas, biogas) or electricity (hydro, wind, solar, etc.). In the end, these fuel cell cars can replace all power plants worldwide. …”

“…Can the nation satisfy its energy demands with wind turbines, solar power, hydroelectric power, or geothermal power? …”

“…In this O’Reilly report, Sean Patrick Murphy, Chief Data Scientist at PingThings, describes how data science is helping electric utilities make sense of a stochastic world filled with increasing uncertainty—including fundamental changes to the energy market and random phenomena such as weather and solar activity. Murphy also reviews several cutting-edge tools for storing and processing big data that he’s used in his work with electric utilities—tools that can help traditional engineers pursue a data-driven approach in many industries. …”

“…Distributed energy resources (DERs) are small-scale energy resources usually situated near sites of electricity use, such as rooftop solar panels and battery storage. Their rapid expansion is transforming not only the way electricity is generated, but also how it is traded, delivered and consumed.Accordingly, DERs can create new power system opportunities, but at the same time, can pose new challenges when a grid has not been properly prepared. …”

“…The text begins with a definition of harmonics, along with analytical expressions for electrical parameters under nonsinusoidal situations, and then: Discusses important and widely used industry standards to control harmonic distortion levels ;Describes methods to mitigate the effects of harmonics, detailing the operation principles and design of passive filters and active filter fundamentals ;Presents alternative methods, such as stiffer AC sources, power converters with increased number of pulses, series reactors, and load reconfiguration ;Reviews the elements that play a role in the study of the propagation of harmonic currents in a distribution network ;Explains how to determine power losses in electrical equipment attributed to harmonic waveform distortion ;Covers harmonics from solar and wind power converters and power electronics in FACTS and HVDC technologies ;Explores harmonics from electric vehicles connected to the grid, superconductive fault current limiters, and electric vehicle charging stations. …”

“…However, due to the variable nature of solar PV and wind, a secure and decarbonised power sector requires other flexible resources on a much larger scale than currently exists today. …”

“…Challenges and opportunities for clean energy finance, including investments in solar energy and batteries The supply and infrastructure required for an expanded role for natural gas, along with a sector-level assessment of its potential. …”

“…But what happens when supply becomes more variable and less certain, as with some renewable sources of electricity like wind and solar PV that fluctuate with the weather? To what extent can the resources that help power systems cope with the challenge of variability in demand also be applied to variability of supply? …”

“…Morocco has an abundance of renewable resources, especially wind and solar power, and is a regional leader in deploying clean energy technologies. …”

“…Author Lee Calcote, Head of Technology Strategy at SolarWinds, demonstrates how service meshes work and provides a path to help you build or convert applications using this architecture. …”

“…This important resource: Contains contributions from noted experts in the field Covers a broad range of topics on the topic of renewable energy Explores the technical impacts of high shares of wind and solar power Offers a review of international smart-grid policies Includes information on wireless power transmission Presents an authoritative view of micro-grids Contains a wealth of other relevant topics Written forenergy planners, energy market professionals and technology developers, Advances in Energy Systems is an essential guide with contributions from an international panel of experts that addresses the most recent smart energy technologies…”

“…Additional chapters review these fire and solar deities and their roles in Maya warfare and examine the nature and manifestations of the Central Mexican thunderbolt god Tlaloc, his incorporation into the Maya pantheon, and his identification with meteors and obsidian weapons. …”

“…The analysis covers 87 countries, six renewable energy sectors (wind, solar, biomass, small hydropower, marine and geothermal) and the 2000-2011 time-span. …”

“…Analyses of these previously returned samples have led to major breakthroughs in the understanding of the age, composition, and origin of the solar system. Having the instrumentation, facilities and qualified personnel to undertake analyses of returned samples, especially from missions that take up to a decade or longer from launch to return, is thus of paramount importance if the National Aeronautics and Space Administration (NASA) is to capitalize fully on the investment made in these missions, and to achieve the full scientific impact afforded by these extraordinary samples. …”

“…This Special Issue provides thirteen interesting papers showing examples of projects undertaken or challenges encountered in various countries, such as: Legal reforms for energy transition in Taiwan and Japan; Transition towards solar PV in South Korea; Transition to electricity driven buses in Central Europe; Vehicle transition and the development of electric car production in the United States, the European Union and Japan; Cooling solutions for buildings in Pakistan; Projects in Ecuador to replace fossil fuel use with Hydropower; The Role of Electrification in the Decarbonization of Central-Western Europe; Energy technology innovation through the application of new technologies in oil resource development; Wastewater treatment challenges in Poland; Increased climate change litigation facing Australian Energy Companies; Renewable energy solution to a Childcare facility in Tokyo; and Canadian policies to support renewable gas production from organic waste. …”

“…Large-scale transient stability is also a concern not to be overlooked: inverter-based wind and solar generation have different angle/speed swing behaviors with respect to traditional generation due to reduced inertia, different voltage swing behaviors due to different voltage control systems, different power flow patterns, and different displacements of synchronous generation at key locations. …”