Narradores ecuatorianos de la década de 1950: poéticas para la lectura de modernidades periféricas (Dossier: Narradores ecuatorianos de la década de 1950)

Estos escritores publicaron entre 1945-1962, y avanzaron mucho más en algunos planteamientos de los narradores del 30. Habiendo asumido su extracción de clase, se preguntaron respecto de su propia identidad, de la problemática del mestizo, de su rol como escritores, del impacto de la incipiente modernidad que desestructuraba la vida cotidiana en sus pueblos y ciudades. Coinciden pues, en lo temático, con los narradores latinoamericanos del período, quienes en lo estético mantuvieron la tensión entre regionalismo y vanguardias, los ecuatorianos se reafirmaron en un realismo que dio espacio al lirismo, aunque también mirando hacia las vanguardias latinoamericanas desde diferentes ángulos. César Dávila Andrade planteó una estética del horror «suprarreal», Ángel F. Rojas manejó modernamente temas emparentados con el regionalismo, Walter Bellolio sintetizó lo mejor de la vanguardia narrativa y la tradición relatística ecuatorianas, Alfonso Cuesta y Cuesta configuró una estética de las metáforas iluminadoras, y Arturo Montesinos trabajó con la metáfora de la ruptura que trae toda modernidad, por más periférica e incipiente que pueda parecer.

La Independencia en tres novelas andinas: Mientras llega el día, La tragedia del Generalísimo y Bolívar. Delirio y epopeya (Dossier: Bicentenario, rastros y revelaciones de la Independencia)

La autora revisa tres novelas que leen la Historia bajo nuevos planteamientos y que proponen otro sentido de heroicidad. La tragedia del Generalísimo, de Denzil Romero, evoca al criollo ilustrado Francisco de Miranda, teórico de los procesos de Independencia. Riera enfatiza las cualidades casi divinas del héroe, sus dudas y excentricidades, su paso de la defensa del realismo al de la causa americana. Mientras llega el día, de Juan Valdano, mira a la Independencia desde una visión contrahegemónica. Riera rescata la noción de que los eventos de 1810, en Quito, no fueron manifestación del nacionalismo criollo, sino de un heterogéneo colectivo social y cultural, el mestizo, que buscaba superar viejos agravios. La biografía Bolívar. Delirio y epopeya, de Víctor Paz, juega con el mito sin alejarse de las fuentes historiográficas. La autora reflexiona sobre los rasgos que definirían al Libertador: cordura-delirio, lucidez-locura, sobre la idea de la emancipación como deseo de posesión de tierras, otorgado por el derecho de nacimiento y negado por la herencia de la sangre. El protagonismo entonces no sería exclusivo de Bolívar, aunque este perviva como paradigma cultural, capaz de legitimar actuales presupuestos de de-colonialidad.

La imaginación, lo fantástico y la ética en El hombre de las ruinas... (1869), de Francisco Javier Salazar Arboleda (Dossier: La novela ecuatoriana del siglo XIX)

Esta novela corta de Salazar Arboleda pertenece al Realismo en transición hacia el Naturalismo, pero, a la vez, enlaza tanto con la novela gótica inglesa del siglo XVIII, como con el cuento fantástico prevalente en la primera mitad del siglo XIX en Francia y Alemania. El cambio de tipos narrativos dentro de la historia que se relata: novela histórica-novela psicológica- novela fantástica-novela ética muestra la forma en que las literaturas europeas eran asimiladas, adaptadas e innovadas durante el siglo XIX en la narrativa ecuatoriana, pero también la manera en que la novela era un vehículo de difusión ideológica.

Rafael Díaz Ycaza: un Prometeo de las letras (In Memorian)

El artículo pasa revista a la carrera literaria de uno de los más grandes escritores guayaquileños del período posterior a la Generación del Treinta: Rafael Díaz Ycaza. Extraordinario cuentista, el autor se inicia con una deuda realista muy cercana a sus predecesores, pero, poco a poco, se va dando una transición hacia lo poético y lo fantástico, sin desprenderse nunca del realismo, en sus penetrantes análisis de problemáticas cercanas a su entorno: la aventura marítima, el enfrentamiento con la muerte, la obsesión del suicidio – perceptibles en algunos de sus mejores títulos, entre ellos “Rosamel” y “Las equivocaciones”. Poeta de notables calidades, está en más de una ocasión a la misma altura de sus grandes contemporáneos: David Ledesma Vásquez, Ileana Espinel Cedeño y Fernando Cazón Vera, los nombres sobresalientes de la lírica de su ciudad (Guayaquil). Los temas son cercanos a los de su narrativa, pero predomina su canto a la ciudad, que se da en diferentes momentos creativos.

De Panamá a San Andrés: mutaciones de la política exterior colombiana (Coyuntura)

Colombian foreign policy has gone through important transformations in its formulation and implementation. Through a Neoclassical Realist (NCR) analysis, this article discusses the domestic and systemic factors that have influenced the Foreign Policy Executive (FPE) in Colombia. It makes a historical journey through different presidential terms, ranging from the loss of Panama in 1903, to the adverse decision of the International Court of Justice (ICJ) in 2012, which stripped Bogotá of a significant portion of its Caribbean Sea. This analysis reveals problems in the formulation of Colombian foreign policy due to a weak foreign service, a complex relationship with the United States and the country’s internal conflict; it is argued that if these factors were to be reduced or disappear, a new form of foreign policy in the country would be facilitated in the twenty-first century.

Forest Policy Scenario Analysis: Sensitivity of Songbird Community to Changes in Forest Cover Amount and Configuration

Changes in mature forest cover amount, composition, and configuration can be of significant consequence to wildlife populations. The response of wildlife to forest patterns is of concern to forest managers because it lies at the heart of such competing approaches to forest planning as aggregated vs. dispersed harvest block layouts. In this study, we developed a species assessment framework to evaluate the outcomes of forest management scenarios on biodiversity conservation objectives. Scenarios were assessed in the context of a broad range of forest structures and patterns that would be expected to occur under natural disturbance and succession processes. Spatial habitat models were used to predict the effects of varying degrees of mature forest cover amount, composition, and configuration on habitat occupancy for a set of 13 focal songbird species. We used a spatially explicit harvest scheduling program to model forest management options and simulate future forest conditions resulting from alternative forest management scenarios, and used a process-based fire-simulation model to simulate future forest conditions resulting from natural wildfire disturbance. Spatial pattern signatures were derived for both habitat occupancy and forest conditions, and these were placed in the context of the simulated range of natural variation. Strategic policy analyses were set in the context of current Ontario forest management policies. This included use of sequential time-restricted harvest blocks (created for Woodland caribou (Rangifer tarandus) conservation) and delayed harvest areas (created for American marten (Martes americana atrata) conservation). This approach increased the realism of the analysis, but reduced the generality of interpretations. We found that forest management options that create linear strips of old forest deviate the most from simulated natural patterns, and had the greatest negative effects on habitat occupancy, whereas policy options that specify deferment and timing of harvest for large blocks helped ensure the stable presence of an intact mature forest matrix over time. The management scenario that focused on maintaining compositional targets best supported biodiversity objectives by providing the composition patterns required by the 13 focal species, but this scenario may be improved by adding some broad-scale spatial objectives to better maintain large blocks of interior forest habitat through time.

The effect of doubled CO2 and model basic state biases on the monsoon-ENSO system. II: Changing ENSO regimes

Integrations of a fully-coupled climate model with and without flux adjustments in the equatorial oceans are performed under 2×CO2 conditions to explore in more detail the impact of increased greenhouse gas forcing on the monsoon-ENSO system. When flux adjustments are used to correct some systematic model biases, ENSO behaviour in the modelled future climate features distinct irregular and periodic (biennial) regimes. Comparison with the observed record yields some consistency with ENSO modes primarily based on air-sea interaction and those dependent on basinwide ocean wave dynamics. Simple theory is also used to draw analogies between the regimes and irregular (stochastically forced) and self-excited oscillations respectively. Periodic behaviour is also found in the Asian-Australian monsoon system, part of an overall biennial tendency of the model under these conditions related to strong monsoon forcing and increased coupling between the Indian and Pacific Oceans. The tropospheric biennial oscillation (TBO) thus serves as a useful descriptor for the coupled monsoon-ENSO system in this case. The presence of obvious regime changes in the monsoon-ENSO system on interdecadal timescales, when using flux adjustments, suggests there may be greater uncertainty in projections of future climate, although further modelling studies are required to confirm the realism and cause of such changes.

Stratospheric water vapour and high climate sensitivity in a version of the HadSM3 climate model

It has been shown previously that one member of the Met Office Hadley Centre single-parameter perturbed physics ensemble – the so-called "low entrainment parameter" member – has a much higher climate sensitivity than other individual parameter perturbations. Here we show that the concentration of stratospheric water vapour in this member is over three times higher than observations, and, more importantly for climate sensitivity, increases significantly when climate warms. The large surface temperature response of this ensemble member is more consistent with stratospheric humidity change, rather than upper tropospheric clouds as has been previously suggested. The direct relationship between the bias in the control state (elevated stratospheric humidity) and the cause of the high climate sensitivity (a further increase in stratospheric humidity) lends further doubt as to the realism of this particular integration. This, together with other evidence, lowers the likelihood that the climate system's physical sensitivity is significantly higher than the likely upper range quoted in the Intergovernmental Panel on Climate Change's Fourth Assessment Report.

Quantifying mesoscale variability in ocean transient tracer fields

A powerful way to test the realism of ocean general circulation models is to systematically compare observations of passive tracer concentration with model predictions. The general circulation models used in this way cannot resolve a full range of vigorous mesoscale activity (on length scales between 10–100 km). In the real ocean, however, this activity causes important variability in tracer fields. Thus, in order to rationally compare tracer observations with model predictions these unresolved fluctuations (the model variability error) must be estimated. We have analyzed this variability using an eddy‐resolving reduced‐gravity model in a simple midlatitude double‐gyre configuration. We find that the wave number spectrum of tracer variance is only weakly sensitive to the distribution of (large scale slowly varying) tracer sources and sinks. This suggests that a universal passive tracer spectrum may exist in the ocean. We estimate the spectral shape using high‐resolution measurements of potential temperature on an isopycnal in the upper northeast Atlantic Ocean, finding a slope near k −1.7 between 10 and 500 km. The typical magnitude of the variance is estimated by comparing tracer simulations using different resolutions. For CFC‐ and tritium‐type transient tracers the peak magnitude of the model variability saturation error may reach 0.20 for scales shorter than 100 km. This is of the same order as the time mean saturation itself and well over an order of magnitude greater than the instrumental uncertainty.

Ecological specificity of arbuscular mycorrhizae: evidence from foliar- and seed-feeding insects

Arbuscular mycorrhizal (AM) fungi have a variety of effects on foliar-feeding insects, with the majority of these being positive, although reports of negative and null effects also exist. Virtually all previous experiments have used mobile insects confined in cages and have studied the effects of one, or at most two, species of mycorrhizae on one species of insect. The purpose of this study was to introduce a greater level of realism into insect-mycorrhizal experiments, by studying the responses of different insect feeding guilds to a variety of AM fungi. We conducted two experiments involving three species of relatively immobile insects (a leaf-mining and two seed-feeding flies) reared in natural conditions on a host (Leucanthemum vulgare). In a field study, natural levels of AM colonization were reduced, while in a phytometer trial, we experimentally colonized host plants with all possible combinations of three known mycorrhizal associates of L. vulgare. In general, AM fungi increased the stature (height and leaf number) and nitrogen content of plants. However, these effects changed through the season and were,dependent on the identity of the fungi in the root system. AM fungi increased host acceptance of all three insects and larval performance of the leaf miner, but these effects were also season- and AM species-dependent. We suggest that the mycorrhizal effect on the performance of the leaf miner is due to fungal-induced changes in host-plant nitrogen content, detected by the adult fly. However, variability in the effect was apparent, because not all AM species increased plant N content. Meanwhile, positive effects of mycorrhizae were found on flower number and flower size, and these appeared to result in enhanced infestation levels by the seed-feeding insects. The results show that AM fungi exhibit ecological specificity, in that different. species have different effects on host-plant growth and chemistry and the performance of foliar-feeding insects. Future studies need to conduct experiments that use ecologically realistic combinations of plants and fungi and allow insects to be reared in natural conditions.

The use of non-hypothetical experimental markets for measuring the acceptance of genetically modified foods

The findings from a study measuring consumer acceptance of genetically modified (GM) foods are presented. The empirical data were collected in an experimental market, an approach used extensively in experimental economics for measuring the monetary value of goods. The approach has several advantages over standard approaches used in sensory and marketing research (e.g., surveys and focus groups) because of its non-hypothetical nature and the realism introduced by using real goods, real money, and market discipline. In each of three US locations, we elicited the monetary compensation consumers required to consume a GM food. Providing positive information about the benefits of GM food production, in some cases, reduced the level of monetary compensation demanded to consume the GM food. (C) 2004 Elsevier Ltd. All rights reserved.

Immersive open surgery simulation

Realistic medical simulation has great potential for augmenting or complimenting traditional medical training or surgery planning, and Virtual Reality (VR) is a key enabling technology for delivering this goal. Although, medical simulators are now widely used in medical institutions, the majority of them are still reliant on desktop monitor displays, and many are restricted in their modelling capability to minimally invasive or endoscopic surgery scenarios. Whilst useful, such models lack the realism and interaction of the operating theatre. In this paper, we describe how we are advancing the technology by simulating open surgery procedures in an Immersive Projection Display CAVE environment thereby enabling medical practitioners to interact with their virtual patients in a more realistic manner.

Identifying and quantifying nonconservative energy production/destruction terms in hydrostatic Boussinesq primitive equation models

This paper seeks to illustrate the point that physical inconsistencies between thermodynamics and dynamics usually introduce nonconservative production/destruction terms in the local total energy balance equation in numerical ocean general circulation models (OGCMs). Such terms potentially give rise to undesirable forces and/or diabatic terms in the momentum and thermodynamic equations, respectively, which could explain some of the observed errors in simulated ocean currents and water masses. In this paper, a theoretical framework is developed to provide a practical method to determine such nonconservative terms, which is illustrated in the context of a relatively simple form of the hydrostatic Boussinesq primitive equation used in early versions of OGCMs, for which at least four main potential sources of energy nonconservation are identified; they arise from: (1) the “hanging” kinetic energy dissipation term; (2) assuming potential or conservative temperature to be a conservative quantity; (3) the interaction of the Boussinesq approximation with the parameterizations of turbulent mixing of temperature and salinity; (4) some adiabatic compressibility effects due to the Boussinesq approximation. In practice, OGCMs also possess spurious numerical energy sources and sinks, but they are not explicitly addressed here. Apart from (1), the identified nonconservative energy sources/sinks are not sign definite, allowing for possible widespread cancellation when integrated globally. Locally, however, these terms may be of the same order of magnitude as actual energy conversion terms thought to occur in the oceans. Although the actual impact of these nonconservative energy terms on the overall accuracy and physical realism of the oceans is difficult to ascertain, an important issue is whether they could impact on transient simulations, and on the transition toward different circulation regimes associated with a significant reorganization of the different energy reservoirs. Some possible solutions for improvement are examined. It is thus found that the term (2) can be substantially reduced by at least one order of magnitude by using conservative temperature instead of potential temperature. Using the anelastic approximation, however, which was initially thought as a possible way to greatly improve the accuracy of the energy budget, would only marginally reduce the term (4) with no impact on the terms (1), (2) and (3).

Data management for the ocean sciences - perspectives for the next decade

There is remarkable agreement in expectations today for vastly improved ocean data management a decade from now -- capabilities that will help to bring significant benefits to ocean research and to society. Advancing data management to such a degree, however, will require cultural and policy changes that are slow to effect. The technological foundations upon which data management systems are built are certain to continue advancing rapidly in parallel. These considerations argue for adopting attitudes of pragmatism and realism when planning data management strategies. In this paper we adopt those attitudes as we outline opportunities for progress in ocean data management. We begin with a synopsis of expectations for integrated ocean data management a decade from now. We discuss factors that should be considered by those evaluating candidate “standards”. We highlight challenges and opportunities in a number of technical areas, including “Web 2.0” applications, data modeling, data discovery and metadata, real-time operational data, archival of data, biological data management and satellite data management. We discuss the importance of investments in the development of software toolkits to accelerate progress. We conclude the paper by recommending a few specific, short term targets for implementation, that we believe to be both significant and achievable, and calling for action by community leadership to effect these advancements.