La violencia entre escolares dentro y fuera del centro escolar en la ciudad de Jaén.

Monográfico con el título: 'Medios, violencia y escuela'. Resumen basado en el de la publicación

Perfils: Evert Jan Baerends i la densitat electrònica de molècules

Evert Jan Baerends és catedràtic de la Universitat Lliure d’Amsterdam i de la Universitat de Ciència i Tecnologia de Pohang de Corea del Sud. És un dels impulsors de l’Amsterdam Density Functional Program System, la teoria que ha revolucionat el camp de la química teòrica i computacional moderna. La importància de la densitat electrònica es va fer patent l’any 1964, quan Walter Kohn (Premi Nobel 1998) va demostrar que totes les propietats de les molècules es poden caracteritzar a partir del coneixement de la densitat. Ha assistit al Girona Seminar, convidat per l’Institut de Química Computacional de la UdG

El Portafolios como estrategia de evaluación y aprendizaje en las asignaturas de química analítica de la Universidad de Jaén

En este trabajo se ha estudiado la aceptación por parte de los alumnos del uso del Portafolios como una estrategia para la evaluación y el aprendizaje de diferentes asignaturas que imparte el Área de Química Analítica en la Universidad de Jaén en tres titulaciones: Licenciaturas en Ciencias Químicas y en Ciencias Ambientales, e Ingeniería Técnica Industrial (Química Industrial). En estas asignaturas se han llevado a cabo diferentes Actividades Académicamente Dirigidas que han sido incorporadas en un Portafolios. Las encuestas de satisfación realizadas a los alumnos indican que éstos están bastantes satisfechos con el uso de estas herramientas de aprendizaje

Suprathermal electron evolution in a Parker spiral magnetic field

Suprathermal electrons (>70 eV) form a small fraction of the total solar wind electron density but serve as valuable tracers of heliospheric magnetic field topology. Their usefulness as tracers of magnetic loops with both feet rooted on the Sun, however, most likely fades as the loops expand beyond some distance owing to scattering. As a first step toward quantifying that distance, we construct an observationally constrained model for the evolution of the suprathermal electron pitch-angle distributions on open field lines. We begin with a near-Sun isotropic distribution moving antisunward along a Parker spiral magnetic field while conserving magnetic moment, resulting in a field-aligned strahl within a few solar radii. Past this point, the distribution undergoes little evolution with heliocentric distance. We then add constant (with heliocentric distance, energy, and pitch angle) ad-hoc pitch-angle scattering. Close to the Sun, pitch-angle focusing still dominates, again resulting in a narrow strahl. Farther from the Sun, however, pitch-angle scattering dominates because focusing is effectively weakened by the increasing angle between the magnetic field direction and intensity gradient, a result of the spiral field. We determine the amount of scattering required to match Ulysses observations of strahl width in the fast solar wind, providing an important tool for inferring the large-scale properties and topologies of field lines in the interplanetary medium. Although the pitch-angle scattering term is independent of energy, time-of-flight effects in the spiral geometry result in an energy dependence of the strahl width that is in the observed sense although weaker in magnitude.

Active literature: Jan Tschichold and New Typography

In the first book on Tschichold to be based on extensive archive research, Burke turns fresh and revealing light on his subject. He sets Tschichold in the network of artists and designers who constituted New Typography in its moment of definition and exploration, and puts new emphasis on Tschichold as an activist collector, editor and writer. Tschichold’s work is shown in colour throughout, in freshly made photographs of examples drawn from public and private collections. This is not a biography, but rather a discussion of the work seen in the context of Tschichold’s life and the times in which he lived.

Parliamentary sovereignty, popular sovereignty, and Henry Parker's adjudicative standpoint

Discussions of popular sovereignty in early modern England have usually been premised upon a sharp distinction between ‘legal/constitutional’ forms of discourse (which merely interpret the law) and ‘political’ ones (which focus upon the right to make it). In such readings of the period, Henry Parker has a pivotal position as a writer who abandoned merely legalistic thinking. This chapter takes a different view. It argues that Parker’s major intellectual achievement was not so much to abandon legal/constitutional discourse as to offer a theorisation of its most distinctive features: he offered an account of a new kind of politics in which concern for ‘interests’ in property and in self-preservation replaced humanist concern with promotion of virtue. Parker drew upon ideas about representation best expressed by Sir Thomas Smith and ideas about law best expressed by Oliver St John. The theory he developed was not intended as a justification of legislative sovereignty, but of adjudicative supremacy. His picture of the two Houses as supreme adjudicators was meant to block the path to direct democracy. But the adjudicative standpoint they came to occupy presupposed that freeborn adults had ‘interests’ in life, liberty, and possessions. This had democratising implications.

Report on IEA Task-14 activities on solar collector systems conference in Rome, 25-29 Jan. 1993

The memebers of IEA (International Energy Agency) Task 14 (Advaced Active Solar Systems) met in Rome during January 1993. The latest developments in several countries were presented and discussed during this meeting. This report describes briefly the recent work carried out on small scale systems in the Domestic Hot Water (DHW) working group of Task 14, as reported by the representatives from Canada, Denmark, Germany, Holland and Switzerland. Klaus Lorenz, SERC, attended the meeting as observer and presented our work on small-tube heat exchangers. Several participants expressed their interest. A summary of his presentation is included in this report.

Class Act: Dean of Admissions Parker Beverage retires after helping to enroll more than 11,000 Colby students

Over a quarter century of hard work, retiring Dean of Admissions Parker Beverage had a hand in Colby’s steady rise.