Relativistic Thomas-Fermi description of collective modes in droplets of nuclear matter

Isoscalar collective modes in a relativistic meson-nucleon system are investigated in the framework of the time-dependent Thomas-Fermi method. The energies of the collective modes are determined by solving consistently the dispersion relations and the boundary conditions. The energy weighted sum rule satisfied by the models considered allows the identification of the giant resonances. The percentage of the energy weighted sum rule exhausted by the collective modes is in agreement with experimental data, but the agreement with the energy of the modes depends on the model considered.

Quasilocal density functional theory and its application within the extended Thomas-Fermi approximation

In this paper we propose a generalization of the density functional theory. The theory leads to single-particle equations of motion with a quasilocal mean-field operator, which contains a quasiparticle position-dependent effective mass and a spin-orbit potential. The energy density functional is constructed using the extended Thomas-Fermi approximation and the ground-state properties of doubly magic nuclei are considered within the framework of this approach. Calculations were performed using the finite-range Gogny D1S forces and the results are compared with the exact Hartree-Fock calculations

Vegetation changes in a river oasis on the southern rim of the Taklamakan Desert in China between 1956 and 2000

The indigenous vegetation surrounding the river oases on the southern rim of the Taklamakan Desert has drastically diminished due to overexploitation as a source of fodder, timber and fuel for the human population. The change in the spatial extent of landscape forms and vegetation types around the Qira oasis was analyzed by comparing SPOT satellite images from 1998 with aerial photographs from 1956. The analysis was supplemented by field surveys in 1999 and 2000. The study is part of a joint Chinese-European project with the aim of assessing the current state of the foreland vegetation, of gathering information on the regeneration potential and of suggesting procedures for a sustainable management. With 33 mm of annual precipitation, plants can only grow if they have access to groundwater, lakes or rivers. Most of the available water comes into the desert via rivers in the form of seasonal flooding events resulting from snow melt in the Kun Lun Mountains. This water is captured in canal systems and used for irrigation of arable fields. Among the eight herbaceous and woody vegetation types and the type of open sand without any plant life that were mapped in 2000 in the oasis foreland, only the latter, the oasis border between cultivated land and open Populus euphratica forests and Tamarix ramosissima-Phragmites australis riverbed vegetation could be clearly identified on the photographs from 1956. The comparison of the images revealed that the oasis increased in area between 1956 and 2000. Shifting sand was successfully combated near to the oasis borders but increased in extent at the outward border of the foreland vegetation. In contrast to expectations, the area covered with Populus trees was smaller in 1956 than today due to some new forests in the north of the oasis that have grown up since 1977. Subfossil wood and leaf remnants of Populus euphratica that were found in many places in the foreland must have originated from forests destroyed before 1956. In the last 50 years, the main Qira River has shifted its bed significantly northward and developed a new furcation with a large new bed in 1986. The natural river dynamics are not only an important factor in forming the oasis’ landscape but also in providing the only possible regeneration sites for all occurring plant species. The conclusion of the study is that the oasis landscape has changed considerably in the last 50 years due to natural floodings and to vegetation degradation by human overexploitation. The trend towards decreasing width of the indigenous vegetation belt resulting from the advancing desert and the expansion of arable land is particularly alarming because a decrease in its protective function against shifting sand can be expected in the future.

The Food Crisis: Implications for Labor

Food prices have gone up to prohibitive levels for many of the world’s poor. The vast majority of those who are hungry in the world today are working in agriculture, either as small landholders or as waged agricultural workers. The majority of the food producers have not benefited from rising prices. Apparently, the bargaining power of many producers, just as that of the end consumers, has been weakened vis-à-vis the buyers and retailers of agricultural produce. This powerlessness is also in the face of governments that fail to provide an appropriate infrastructure for smallholders and social protection. The first part of the book provides an introduction to the immediate and structural causes of the food crisis. The second part contains contributions that not only highlight the plight of rural labour but also develop tools for measuring the decent work deficit. The last part emphasizes income security as a major precondition for food security. It looks at the experiences of Brazil and India with the extension of social protection for the poor.

Manuel-Juan Carrillo Marco : Cieza 1915-1988 : cuaderno didáctico para primaria.

Cuaderno didáctico destinado al alumnado de primaria, con el objetivo de que este conozca la vida y obra del escultor ciezano Manuel-Juan Carrillo Marco..

Manuel-Juan Carrillo Marco : Cieza 1915-1988 : cuaderno didáctico para secundaria.

Cuaderno didáctico destinado al alumnado de secundaria, con el objetivo de que este conozca la vida y obra del escultor ciezano Manuel-Juan Carrillo Marco..

La cualificación profesional de los educadores infantiles en España desde 1857 hasta 1970.

Esta comunicación, presentada en el XV Congreso de Historia de la Educación celebrado en Pamplona, en julio de 2009, ofrece un acercamiento al papel desempeñado por los maestros de la primera infancia desde mediados del siglo XIX hasta 1970. Se analizan los cambios surgidos en la formación inicial, el grado de especialización alcanzado, y cuáles han sido los criterios y mecanismos de selección y acceso a la profesión hasta la plena especialización marcada por la Ley General de Educación de 1970.

Estructura administrativa de la Provincia de Bogotá durante el periodo comprendido entre 1832- 1857

El estudio de la estructura administrativa de la provincia de Bogotá en el siglo IX es importante por cuanto se muestra por primera vez cuales fueron los primeros entes administrativos que se crearon durante este periodo, fundamentalmente durante la vigencia de la constitución de 1832. El régimen territorial de las provincias se dividió a su vez en cantones y éstos, en distritos parroquiales.

Educació de la dona a Mallorca (primer terç del segle XX) : IES, Palma, 1915. 'Educación de la mujer en Mallorca (primer tercio del siglo XX) : IES, Palma, 1915'.

Resumen tomado parcialmente de la propia revista

Alfabetización y nivel social : una aproximación cuantitativa (Madrid, 1915).

Estas Jornadas tuvieron lugar en Punta Prima, Menorca, en mayo de 1986 y fueron editadas por el ICE de la UIB. Resumen tomado parcialmente de la propia publicación

“Perseguir el vicio y amparar la virtud”: Prostitución, lujuria y control en Pereira 1857-1907

“Perseguir el vicio y amparar la virtud”: Prostitución, lujuria y control en Pereira 1857-1907 examina los distintos estereotipos, discursos, mecanismos políticos y dispositivos establecidos con el fin de controlar los discursos de género, específicamente, aquellos alrededor de la prostitución en el Distrito de Pereira en el período de 1857 a 1907. Políticas públicas, diarios de viajeros, prensa local, estudios médicos y otros documentos son usados para argumentar que a finales del siglo XIX y principios del XX el establecimiento de controles sobre el género, la sexualidad y la prostitución fueron uno de los aspectos centrales en la constitución sociopolítica de la ciudad de Pereira. “Perseguir el vicio y amparar la virtud”: Prostitución, lujuria y control en Pereira 1857-1907 recalca la importancia de investigar la relación entre el control de la sexualidad y la implantación de los mecanismos y tecnologías del Estado-Nación. Valiéndose de las perspectivas de la antropología histórica y del género, esta investigación provee un acercamiento que permite comprender cómo el Estado utilizó las políticas de control sobre la sexualidad, la prostitución y la lujuria en como vías de implantación de mecanismos de normalización y vigilancia sobre la población de la naciente ciudad de Pereira.

Premsa obrera d'esquerres i educació per a la salut a Mallorca a l'inici del segle XX (1900-1915). 'Prensa obrera de izquierdas y educación para la salud en Mallorca a principios del siglo XX (1900-1915)'.

Resumen tomado de la revista