Fragmentos de un discurso no amoroso: Thomas Jefferson y la América Hispana. Una aproximación a las relaciones sur-norte (Estudios)

A lo largo del siglo XIX, el pensamiento de Thomas Jefferson fue un punto de encuentro entre Hispanoamérica y los Estados Unidos. Esas aproximaciones estuvieron cruzadas al mismo tiempo por un sentido de admiración y por una serie de temores. Este ensayo reúne y analiza algunos de los fragmentos en que la imagen de Jefferson, su pensamiento y sus escritos evidencian esa relación ambigua en escritores decimonónicos clave como Andrés Bello, Domingo Sarmiento y Esteban Echeverría. Por otra parte, el ensayo reúne fragmentos de las cartas escritas por Jefferson a Alexander von Humboldt, en las que manifiesta su escaso interés por las independencias hispanoamericanas y su desconocimiento sobre los procesos ilustrados que allí se habían desarrollado.

Metáforas e intertextos de la enfermedad: suicidio y homoerotismo adolescente en las novelas Conquering Venus, de Collin Kelley y Suicide Notes, de Michael Thomas Ford

En el mundo cada cinco minutos se produce un suicidio en adolescentes por problemas inherentes a su sexualidad. Frente a este escenario la genealogía de los discursos médico, jurídico y literario se entreteje apretando los hilos, convirtiéndose en cábala del suicidio; un reflejo difuso de una realidad menos ficcional y más dolorosa. A pesar de las cifras alarmantes, no se ha trabajado el tema; menos aún con la perspectiva de encontrar relación entre los discursos históricos que en su búsqueda de poder y control han dibujado sobre los cuerpos, representaciones de una disciplina heterosexual. Es indispensable una perspectiva cualitativa, reflexiones que aporten a una práctica ética diferente, que incluya los nuevos cuerpos filosóficos, legales, concibiendo al adolescente como sujeto, con la agencia que deben tener sus cuerpos. En contraste en la literatura (¿mundo ficticio?) se describe y resignifica de manera exhaustiva esta realidad, rescatando la capacidad creativa y re-creativa del lenguaje. Esto por un lado permite analizar los contextos y coyunturas sociales, culturales; y, por otro interpretar los imaginarios sociales y las metáforas que refuerzan este contexto. Como mencionara Stuart Hall, a través de la representación conectamos el lenguaje al sentido y la cultura. Y esto nos licencia a referirnos al mundo real pero también a un mundo ficticio. Esta exploración pretende aportar a esta problemática mediante la descripción de esa compleja interseccionalidad y la identificación de posibles intersticios en el lenguaje que pudieran dar sentido y descodificar ciertas incertidumbres, contribuir a cambios micro sociales y, quizás, conducir a lo que pudiera ser el comienzo de un diálogo más amplio que empuje posicionamientos y cambios estructurales, frente a discursos vetustos que siempre encuentran mecanismos para reinventarse. ¿Cómo se representan y entretejen los discursos de homoerotismo1 adolescente y suicidio representados en las novelas Conquering Venus de Collin Kelley, Suicide Notes de Michael Thomas Ford? Lo podremos averiguar examinando las matrices discursivas del homoerotismo y su castigo, la homosexualidad; analizando el suicidio como un acto humano complejo, incomprensible, un tabú en nuestra sociedad, e identificando en las novelas escogidas, las intersecciones entre homoerotismo y tendencias suicidas en el cuerpo adolescente.

Gray-cheeked Thrush (Catharus minimus minimus) distribution and habitat use in a montane forest landscape of western Newfoundland, Canada

Once abundant, the Newfoundland Gray-cheeked Thrush (Catharus minimus minimus) has declined by as much as 95% since 1975. Underlying cause(s) of this population collapse are not known, although hypotheses include loss of winter habitat and the introduction of red squirrels (Tamiasciurus hudsonicus) to Newfoundland. Uncertainties regarding habitat needs are also extensive, and these knowledge gaps are an impediment to conservation. We investigated neighborhood (i.e., within 115 m [4.1 ha]) and landscape scale (i.e., within 1250 m [490.8 ha]) habitat associations of Gray-cheeked Thrush in a 200-km² study area in the Long Range Mountains of western Newfoundland, where elevations range from 300-600 m and landcover was a matrix of old growth fir forest, 6- to 8-year-old clearcuts, coniferous scrub, bogs, and barrens. Thrushes were restricted to elevations above ~375 m, and occurrence was strongly positively related to elevation. Occurrence was also positively related to cover of tall scrub forest at the neighborhood scale, and at the landscape scale showed curvilinear relations with the proportion of both tall scrub and old growth forest that peaked with intermediate amounts of cover. Occurrence of thrushes was also highest when clearcuts made up 60%-70% of neighborhood landcover, but was negatively related to cover of clearcuts in the broader landscape. Finally, occurrence was highest in areas having 50% cover of partially harvested forest (strip cuts or row cuts) at the neighborhood scale, but because this treatment was limited to one small portion of the study area, this finding may be spurious. Taken together, our results suggest selection for mixed habitats and sensitivity to both neighborhood and landscape-scale habitat. More research is needed on responses of thrushes to forestry, including use of older clearcuts, partially harvested stands, and precommercially thinned clearcuts. Finally, restriction of thrushes to higher elevations is consistent with the hypothesis that they have been impacted by squirrels, because squirrels were rare or absent at these elevations.

An objective climatology of the dynamical forcing of polar lows in the Nordic seas

A new objective climatology of polar lows in the Nordic (Norwegian and Barents) seas has been derived from a database of diagnostics of objectively identified cyclones spanning the period January 2000 to April 2004. There are two distinct parts to this study: the development of the objective climatology and a characterization of the dynamical forcing of the polar lows identified. Polar lows are an intense subset of polar mesocyclones. Polar mesocyclones are distinguished from other cyclones in the database as those that occur in cold air outbreaks over the open ocean. The difference between the wet-bulb potential temperature at 700 hPa and the sea surface temperature (SST) is found to be an effective discriminator between the atmospheric conditions associated with polar lows and other cyclones in the Nordic seas. A verification study shows that the objective identification method is reliable in the Nordic seas region. After demonstrating success at identifying polar lows using the above method, the dynamical forcing of the polar lows in the Nordic seas is characterized. Diagnostics of the ratio of mid-level vertical motion attributable to quasi-geostrophic forcing from upper and lower levels (U/L ratio) are used to determine the prevalence of a recently proposed category of extratropical cyclogenesis, type C, for which latent heat release is crucial to development. Thirty-one percent of the objectively identified polar low events (36 from 115) exceeded the U/L ratio of 4.0, previously identified as a threshold for type C cyclones. There is a contrast between polar lows to the north and south of the Nordic seas. In the southern Norwegian Sea, the population of polar low events is dominated by type C cyclones. These possess strong convection and weak low-level baroclinicity. Over the Barents and northern Norwegian seas, the well-known cyclogenesis types A and B dominate. These possess stronger low-level baroclinicity and weaker convection.