Description of the final instar larva of argia serva hagein selys, 1865 (Odonata coenagrionidae)

The American genus Argia, with more than 100 species described, is the most speciose genus of Odonata in the world. In this contribution, the final stadium larva of Argia serva, the southernmost distributed species of Argia, is described and diagnosed based on reared material from Martín García island, Buenos Aires, Argentina. The larva of this species can be easily separated from the other Argentinean Argia by the following combination of characters: sternum of S8 covered with spines (bare in A. translata); antennal segment 3 longer than 1+2 (equal to or shorter than 1+2 in A. joergenseni and A. jujuya); palpal setae absent (present in A. croceipennis). A key to the known larvae of Argia of the Southern Cone is provided.Fil: del Palacio, Alejandro. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de Avellaneda. Departamento de Ciencias Ambientales; ArgentinaFil: Lozano, Federico. Universidad Nacional de Avellaneda. Departamento de Ciencias Ambientales; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Muzón, Javier. Universidad Nacional de Avellaneda. Departamento de Ciencias Ambientales; Argentin

A model for high-mass microquasar jets under the influence of a strong stellar wind

Context. High-mass microquasars (HMMQs) are systems from which relativistic jets are launched. At the scales of several times the binary system size, the jets are expected to follow a helical path caused by the interaction with a strong stellar wind and orbital motion. Such a trajectory has its influence on the non-thermal emission of the jets, which also depends strongly on the observing angle due to Doppler boosting effects. Aims: We explore how the expected non-thermal emission of HMMQ jets at small scales is affected by the impact of the stellar wind and the orbital motion on the jet propagation. Methods: We studied the broadband non-thermal emission, from radio to gamma rays, produced in HMMQ jets up to a distance of several orbital separations, taking into account a realistic jet trajectory, different model parameters, and orbital modulation. The jet trajectory is computed by considering momentum transfer with the stellar wind. Electrons are injected at the position where a recollimation shock in the jets is expected due to the wind impact. Their distribution along the jet path is obtained assuming local acceleration at the recollimation shock, and cooling via adiabatic, synchrotron, and inverse Compton processes. The synchrotron and inverse Compton emission is calculated taking into account synchrotron self-absorption within the jet, free-free absorption with the stellar wind, and absorption by stellar photons via pair production. Results: The spectrum is totally dominated by the jet over the counter-jet due to Doppler boosting. Broadband emission from microwaves to gamma rays is predicted, with radio emission being totally absorbed. This emission is rather concentrated in the regions close to the binary system and features strong orbital modulation at high energies. Asymmetric light curves are obtained owing to the helical trajectory of the jets.Fil: Molina, E.. Universidad de Barcelona; EspañaFil: del Palacio, Santiago. Provincia de Buenos Aires. Gobernación. Comisión de Investigaciones Científicas. Instituto Argentino de Radioastronomía. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto Argentino de Radioastronomía; ArgentinaFil: Bosch Ramon, Valentí. Universidad de Barcelona; Españ

Eventos con fines sociales : Estudio de caso, Fundación Helping by Doing

El presente Trabajo Fin de Grado, pretende investigar los eventos con fines sociales, su evolución, presencia hoy en día y beneficios que puede reportar a la sociedad. Estos eventos incluyen un impacto y una transcendencia en el mundo social, por ello creemos que es importante estudiar a fondo estos actos que son empleados por las empresas para hacer frente a la necesidad de enfocar su actividad en el bien común y devolver a la sociedad lo que, como empresas u organizaciones, toman prestado del espacio común para su lucro privado. Para aproximarnos lo más posible a nuestro objeto de estudio, realizaremos un estudio de caso explorando la filosofía y actividades de la Fundación Helping by Doing, que complementaremos una entrevista a su fundador, quien dedica su tiempo a realizar eventos que contengan un fin social y estén realizados desde la responsabilidad social estratégica, no filantrópica. En esta organización se trabaja desde una igualdad de planos entre el mundo empresarial y social para así tratar de reportar mayores beneficios para ambosThe following project aims to investigate events with social purposes, as well as their evolution, their presence nowadays and the benefits that they provide society with. The study of these events is justified by their impact and transcendence in the social world, as a way to understanding the need that companies have to focus their activity on the common good and to return to society what is borrowed from the common space by organizations for their private profit. In order to get a closer approach to the object of the study, a case will be conducted around the Helping by Doing Foundation, supported by an interview with its founder, who devotes his time to holding events that have a social purpose and that are developed from a strategic social responsibility, not philanthropic, something essential due to the fact that the equality between the business and social work is expected in order to report greater benefits in both fields.Departamento de Historia Moderna, Contemporánea y de América, Periodismo y Comunicación Audiovisual y PublicidadGrado en Publicidad y Relaciones Pública

Biology of Selected Opiine Parasitoids (Braconidae) and Their Abundance Relative to the Host Bactrocera Dorsalis (Hendel). on Carambola

The apiines (Hymenoptera : Braconidae) are important parasitoids of the oriental truit fly. Bactrocera dorsalis (Hendel) (Diptera : Tephritidae). In an attempt to exploit their potential in the integrated control of this pest. field and laboratory studies were conducted to generate information about the biology and abundance of the major species, Based on contribution to overall parasitisation. the opiine parasitoids associated with B. dorsalis in star fruit can be arranged in the following order of importance : Biosteres persulcatus Silvestri, 46.53% B. arisanus (Sonan), 32.82% B. lonqicaudatus Ashmead, 5.69% Opius fletcheri Silvestn, 4.95%. field populations of fruit fly and parasitoids had two peak periods yearly, and both were significantly correlated with abundance of their respective host, except B. lonqicaudatus. However, their activities were significantly unaffected by size and height of host fruit in the tree

Roger Woolhouse: Locke. A Biography. Cambridge University Press, Cambridge, 2007

Sin resume

Au commencement était le désir: Fénelon ou le parcours du corps perdu

Partiendo del psicoanálisis y de la filosofía, este trabajo retoma la oposición entre piedad mercenaria y amor puro para abrir otros cauces a la lectura de Fénelon. En pleno auge de la ciencia, cuyo fin, así como el del “yo”, se encarga de anunciar, su obra surge como espacio de vacío y muerte, de desprendimiento y pérdida.Working from psychoanalysis and philosophy, this article takes up the opposition between mercenary and pure love in order to open up new paths to the reading of Fénelon. At a time when science was at its peak, his works announced its end, as well as that of the ego, and emerged as a space of emptiness and death, of detachment and loss