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Variability of Blazars
Blazars (also known as BL Lac objects), first discovered in 1978, are unusually energetic objects in the extragalactic universe. About 200 are known or suspected. They are radio sources with highly variable optical and radio emission, as well as high polarisation, and their optical spectra normally have no distinguishable features. It is generally accepted that they belong to that class of galaxies with active galactic nuclei, which are presumed to be driven by infall of matter to a supermassive black hole. In this book researchers give a complete summary of the observations of blazars and the theoretical interpretation. A comprehensive listing of confirmed and candidate objects is included. Mechanisms in which the variability can arise from shocks and relativistic jets are discussed. There are at least four different answers given to the question: what is a blazar? This book is a complete overview of the violent activity observed in these extreme active galactic nuclei.
Feminismos aplicados. Un enfoque desde la educación, género, violencia estructural y los movimientos sociales.
En el momento actual el feminismo Se ha convertido en uno de los campos de conocimiento más fecundos, con más producción científica y desarrollos más originales, pues sus trabajos se incardinan en toda una corriente que proviene de múltiples sectores, una fuerza viva, como atestiguan las grandes protestas de mujeres que han tenido lugar en la última década. Los resultados de las investigaciones feministas suscitan indudable interés social, pues estos estudios nacen de la necesidad generada por la pervivencia de la discriminación estructural, el androcentrismo cultural y la violencia machista que no cesa. Los últimos años han estado marcados por el deterioro de las condiciones económicas, el intento de retroceso de los servicios públicos y el aislamiento a causa de la pandemia de Covid-19. Dicha situación ha acrecentado todas las formas de discriminación, violencia y subordinación experimentadas por las mujeres. Todo ello acredita la actualidad de este libro que desarrolla un análisis feminista de la sociedad y la cultura.
Some Faggy Gestures
Tiré du site Internet de JRP/Ringier: "Since the mid-1990s, Henrik Olesen (*1967 Denmark, lives and works in Berlin) has used media such as collage, sculpture, and minimalistic spatial intervention to investigate the social construction of identity and its historiography. Through the appropriation of source images and contextual shifts not dissimilar to the method invented by Aby Warburg for his "Mnemosyne Atlas," Olesen probes the associations between homosexuality and its criminalization in the past, as well as in the present. His archival work sheds light on the enduring existence of spaces for Others, and inscribes homosexual subculture once more into the history of art and culture. Published with the Migros Museum für Gegenwartskunst, Zurich."
Food Safety Culture
Food safety awareness is at an all time high, new and emerging threats to the food supply are being recognized, and consumers are eating more and more meals prepared outside of the home. Accordingly, retail and foodservice establishments, as well as food producers at all levels of the food production chain, have a growing responsibility to ensure that proper food safety and sanitation practices are followed, thereby, safeguarding the health of their guests and customers. Achieving food safety success in this changing environment requires going beyond traditional training, testing, and inspectional approaches to managing risks. It requires a better understanding of organizational culture and ...
Recent Advances In Density Functional Methods, Part Ii
Of all the different areas in computational chemistry, density functional theory (DFT) enjoys the most rapid development. Even at the level of the local density approximation (LDA), which is computationally less demanding, DFT can usually provide better answers than Hartree-Fock formalism for large systems such as clusters and solids. For atoms and molecules, the results from DFT often rival those obtained by ab initio quantum chemistry, partly because larger basis sets can be used. Such encouraging results have in turn stimulated workers to further investigate the formal theory as well as the computational methodology of DFT.This Part II expands on the methodology and applications of DFT. Some of the chapters report on the latest developments (since the publication of Part I in 1995), while others extend the applications to wider range of molecules and their environments. Together, this and other recent review volumes on DFT show that DFT provides an efficient and accurate alternative to traditional quantum chemical methods. Such demonstration should hopefully stimulate frutiful developments in formal theory, better exchange-correlation functionals, and linear scaling methodology.
Hispanic Stars Rising
Hispanics are 100% Hispanic and 100% American. They believe in the American dream and are incredible contributors to this country. US Hispanics represent 60 million people, 18% of the population, 12% of the country's GDP, $1.7 trillion of purchasing power, the youth population - and the list goes on! Yet, they are often invisible, negatively portrayed, seen as takers. Hispanics contribute so much to America, and now it is time for others to see just how beautiful and resilient they can be.Hispanic Stars Rising: The New Face of Power shares the stories about the experiences, challenges, and successes of Hispanic Stars nationwide. It showcases the diverse backgrounds, obstacles and contributions made by this strong and resilient population nationwide and shines a light on the beauty of this fundamental American community.
Mathematics of Planet Earth
It is widely recognized that the degree of development of a science is given by the transition from a mainly descriptive stage to a more quantitative stage. In this transition, qualitative interpretations (conceptual models) are complemented with quantification (numerical models, both, deterministic and stochastic). This has been the main task of mathematical geoscientists during the last forty years - to establish new frontiers and new challenges in the study and understanding of the natural world. Mathematics of Planet Earth comprises the proceedings of the International Association for Mathematical Geosciences Conference (IAMG2013), held in Madrid from September 2-6, 2013. The Conference addresses researchers, professionals and students. The proceedings contain more than 150 original contributions and give a multidisciplinary vision of mathematical geosciences.
