7,208 research outputs found
Sustainable Planning of Land Use Changes in farming areas under ecological protection
Land use has been changing in the last decades because of agricultural intensification and land abandonment which implies deterioration in the optimum habitat structure and quality. Habitat degradation and loss, resulting from changes in land use remain significant drivers of biodiversity loss. These trends are widely recognised and have forced national and international agencies to identify protected sites for natural areas with high biodiversity value. Special Protection Areas (SPAs) are natural zones particularly relevant for nature conservation. Regional planning is bound to play an increasing role in nature conservation policies because much biodiversity is located in farming areas outside natural parks. Agriculture in the Mediterranean Basin has always been highly dependent on rainfed crops, cereal, vine and olive. Vine growing plays an important role not only from the economic point of view, but also environmentally as a permanent plant cover in terms of preventing erosion, managing land and water resources in a sustainable way, defending against desertification an settling population in rural areas. A Geographic Information System (GIS) was used to implement a decision tool system to analyse the feasibility of new proposals to upgrade traditional vineyards in Castilla-La Mancha, Spain. The study focuses on the sustainability of current farming practices in Special Protection Areas for Steppe Land Birds. This paper presents a model to quantify the resulting habitat fragmentation basing on infrastructure facilities, leading to mapping areas where to apply restriction measures to prevent physical destruction of the habita
The interaction between jets and clouds in the 3CR galaxies
From the HST/WFPC2 3CR Snapshot Survey, data taken with the filter F555W, F702W and narrow-ramp, a set of galaxies with noticeable extended structure were selected (e.g. 3C 79, 3C 135, 3C 234, etc). All of these objects show large regions of [OIII] λ 5007˚A emission (narrow ramp filter) and the broad-band filters data show similar structures indicating the presence of strong emission in several lines over these regions. The morphology observed seems to be related (e.g. same position angle, direct overlapping or similar shape) with the radio-jet. For some candidates with these properties GMOS/Gemini spectroscopy was taken. These data (both HST direct imaging and Gemini spectroscopy) can be tested with diagnostic diagrams and total UV photons budget to understand the source of energy that is ionizing the gas. This source of ionization was commonly believed to be the UV photons emitted by the powerful active galactic nuclei (AGN), but several of these objects show clearly that shocks produced by the radio jet are the main cause of the observed gas line emission. We show in this work, the results obtained over some of these radio-galaxies: 3C 135, 3C 180, 3C 234 and 3C 284.Fil: Hägele, G. F.. Universidad Autónoma de Madrid; EspañaFil: Feinstein Baigorri, Carlos. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas; ArgentinaFil: Macchetto, D. F.. Space Telescope Science Institute; Estados UnidosFil: Montero, F.. Consejo Nacional de Investigaciónes Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Astronomía y Física del Espacio. - Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Astronomía y Física del Espacio; Argentin
Reply to ``Comment on `Majoron emitting neutrinoless double beta decay in the electroweak chiral gauge extensions' ''
We demonstrate that in the process of deducing the constraint on the
electroweak mixing angle in our paper, we have indeed been working
with three mass scales while implementing (331) model.Comment: Revtex, 3pages, Reply to hep-ph/9902448, Submitted to Phys. Rev.
Energy partition and segregation for an intruder in a vibrated granular system under gravity
The difference of temperatures between an impurity and the surrounding gas in
an open vibrated granular system is studied. It is shown that, in spite of the
high inhomogeneity of the state, the temperature ratio remains constant in the
bulk of the system. The lack of energy equipartition is associated to the
change of sign of the pressure diffusion coefficient for the impurity at
certain values of the parameters of the system, leading to a segregation
criterium. The theoretical predictions are consistent with previous
experimental results, and also in agreement with molecular dynamics simulation
results reported in this paper.Comment: To appear in Phys. Rev. Let
La música fusión, ¿verdadera inclusión? Una exploración de la escena fusión en Lima (Music fusion, true inclusion? An exploration of the fusion scene in Lima)
En los últimos años, la fusión intercultural en Lima ha ido creciendo hasta convertirse en un género musical ‘nacional’ portador y visibilizador de interacciones inter-sociales e inter-étnicas, las cuales retan la segregación cultural sistemática de la sociedad peruana. Esta música brinda espacios donde los jóvenes de clases altas tradicionales retan sus roles históricos antagonistas y buscan la trascendencia cultural y significado espiritual, a fin de hallar sus propias tradiciones culturales, un concepto propio de lo sagrado, y de ellos mismos. Este artículo, basado en diversos estudios de caso, explora los discursos, a veces contradictorios, que emplean los músicos de fusión (de clase alta tradicional o no) al describir su música, así como los temas que ellos resaltan como trascendentales para compartir con su público de clase alta tradicional a través de sus proyectos musicales. Luego, examinará el potencial de esta música fusión como herramienta para facilitar las interacciones creativas inter-étnicas e inter-clase, a través de las cuales los jóvenes de clases altas tradicionales pueden recrear su ‘yo’ y auto-incluirse en una narrativa de país más plural y menos exclusiva. Finalmente, documentará cómo los músicos de fusión retan las ya normalizadas percepciones e imaginarios sociales de las clases altas tradicionales mediante la creación de diálogos musicales. Analizará cómo el entender la diferencia mediante la música facilita la búsqueda de su propio yo político y espiritual; lo cual les permite trascender la música y subvertir su propia identidad de clase para así experimentar una Lima “más real”, un “nuevo Perú”.
Translation: In recent years, the intercultural fusion in Lima has grown to become a 'national' musical genre that is the carrier and visibilizer of inter-social and inter-ethnic interactions, which challenge the systematic cultural segregation of Peruvian society. This music provides spaces where young people of traditional upper classes challenge their antagonistic historical roles and seek cultural transcendence and spiritual significance, in order to find their own cultural traditions, a concept of the sacred, and themselves.
This article, based on several case studies, explores the sometimes contradictory discourses used by fusion musicians (traditional or not) to describe their music, as well as the themes they highlight as transcendental to share with their traditional high class public through their musical projects. Next, he will examine the potential of this fusion music as a tool to facilitate inter-ethnic and inter-class creative interactions, through which young people of traditional upper classes can recreate their 'self' and self-include themselves in a country narrative. more plural and less exclusive. Finally, he will document how fusion musicians challenge the already normalized social perceptions and imaginaries of the traditional upper classes through the creation of musical dialogues. Analyze how understanding the difference through music facilitates the search of your own political and spiritual self; which allows them to transcend music and subvert their own class identity in order to experience a "more real" Lima, a "new Peru"
Turning Things Around? From White Fusion Stars with Andean Flavour ro Andean Fusion Stars with White Appeal
Popular fusion music in Peru’s capital Lima has in recent years grown to a representative genre challenging existing segregation of Limeño society through interethnic and interclass interaction. Focusing on three case studies of Peruvian fusionists performing for the white upper classes, this article documents a shift in racialised notions of Andeanness and marginality among the white upper classes from 1960 to 2014 linking the changes in perception to the political and social context of those years. It examines the trajectories of Miki González – an older white fusion star who hires Andean musicians, La Sarita – an intercultural Andean rock band striving to balance the urban and the Andean, and Magaly Solier – a young Andean campesina (‘peasant’) actress and singer who hires white musicians. These case studies demonstrate how fusion music interactions contribute to re-shape traditional cultural imaginaries, challenge racism, and project images of empowerment onto 21st century Andeans
Symmetry breaking and clustering in a vibrated granular gas with several macroscopically connected compartments
The spontaneous symmetry breaking in a vibro-fluidized low-density granular
gas in three connected compartments is investigated. When the total number of
particles in the system becomes large enough, particles distribute themselves
unequally among the three compartments. Particles tend to concentrate in one of
the compartments, the other two having the (relatively small) same average
number of particles. A hydrodynamical model that accurately predicts the
bifurcation diagram of the system is presented. The theory can be easily
extended to the case of an arbitrary number of connected compartments
Quantum interference oscillations of the superparamagnetic blocking in an Fe8 molecular nanomagnet
We show that the dynamic magnetic susceptibility and the superparamagnetic
blocking temperature of an Fe8 single molecule magnet oscillate as a function
of the magnetic field Hx applied along its hard magnetic axis. These
oscillations are associated with quantum interferences, tuned by Hx, between
different spin tunneling paths linking two excited magnetic states. The
oscillation period is determined by the quantum mixing between the ground S=10
and excited multiplets. These experiments enable us to quantify such mixing. We
find that the weight of excited multiplets in the magnetic ground state of Fe8
amounts to approximately 11.6%.Comment: Accepted in Phys. Rev. Let
- …