1,082 research outputs found
Most HIV type 1 non-B infections in the Spanish cohort of antiretroviral treatment-naïve HIV-infected patients (CoRIS) are due to recombinant viruses
No full textYebra, G., De Mulder, M., Martín, L., Rodríguez, C., Labarga, P., Viciana, I., Berenguer, J., Alemán, M.R., Pineda, J.A., García, F., Holguín, Á
Experimental study of two event-based PI controllers in a solar distributed collector field
No full textIn this work we focus on the study of limit cycles that appear in a control scheme which is based on the use of a PI controller with an event-based send-on-delta sampling (SOD), which can be used to sample either the process variable or the control variable. We use an algorithm to calculate the limit cycles properties and then we compare the results obtained in simulations with experiments performed on a real plant, a distributed solar collector field at the Solar Platform of Almería (PSA, Spain). The process is identified as a first order plus time delay (FOPTD). Practical issues, such as the implementation of an anti-windup mechanism and a bumpless transfer between the manual and automatic mode are also addressed
SORBITOL SYNTHESIS FROM A LACTOBACILLUS CASEI FOOD-GRADE STRAIN USING METABOLIC ENGINEERING
No full textSorbitol is a sugar alcohol that is assumed to have important physiological properties for human health. It could replace high-calorie sugars such as glucose, lactose or sucrose in food products with equivalent sweetness and taste. The synthesis of sorbitol in situ during fermentation of dairy products may result in a good strategy to obtain fermented products with extra health-promoting value. A food-grade recombinant strain of Lactobacillus casei (BL232) was constructed by the integration of a D-Sorbitol-6-phosphate dehydrogenase-encoding gene (gutF) in the chromosomal lactose operon. gutF expression followed the same regulation as that of the lac genes, that is, repressed by glucose and induced by lactose. BL232 cells were induced with lactose, and using 13C-nuclear magnetic resonance analysis, sorbitol was detected by addition of glucose to resting cells. Inactivation of the L-lactate dehydrogenase gene in BL232 led to higher sorbitol production, suggesting that the novel route provides an alternative pathway for NAD+ regeneration. Since sorbitol is not absorbed in the small intestine, it could reach the colon and there it could selectively stimulate the multiplication or activity of beneficial bacteria. Results showing the influence of sorbitol on the intestinal microbiota of rats will be presente
Constrained control strategies for disturbance rejection in a solar furnaces
No full textThis paper addresses the temperature control problem in a solar furnace. In particular, two control strategies for the disturbances rejection (represented by the variation of the input energy provided by the Sun, mainly because of passing clouds and the solar daily cycle) are proposed, based on a twodegrees-of-freedom scheme. The first one is based on generalized predictive control, where a nonlinear
model is employed for free response prediction while a linearized model is used for the computation of the forced response. Amplitude and slew-rate constraints on both the control variable and the output of the system are taken into account. The second one is a constrained control strategy where both the process input and output constraints are taken into account explicitly. In both cases an adaptation of the most significant process parameter is performed. Simulation and experimental results show the effectiveness of the methodologies
On reduction of control effort in feedback linearization GPC strategy applied to a solar furnace
No full textIn this paper, the temperature control of a solar furnace is addressed by taking into account physical and safety constraints. In particular, the use of a feedback linearization generalized predictive control strategy is proposed where the fictitious model providing a virtual control signal is suitably selected to reduce the control effort by considering both the reference tracking task and the compensation of disturbances, represented by the variation of the input energy provided by the Sun, mainly because of the solar daily cycle and passing clouds. Simulation and experimental results show the effectiveness of the methodology in comparison with other approaches helping this technology to become an inexpensive alternative option for the material treatment and testing in the industrial context
Traumatic identity and aura in David Lodge's "Author, author"
No full textEste artículo analiza la novela Author, Author (2004) de David Lodge como ejemplo de bioficción neo-victoriana centrada en una celebridad, en este caso concreto, Henry James. El género forma parte del renacimiento Victoriano actual que afecta a los estudios culturales en su conjunto. Mi argumento central es que la novela de Lodge constituye una respuesta a las ansiedades culturales actuales, en particular a las que se refieren a la crisis identitaria y autoría literaria, así como a la pérdida del aura artística de Walter Benjamin, sublimándolas a través de los traumas de finales del siglo XIX. La elección de James, como demuestra el artículo, no es casual. Es el último representante de un mundo perdido en el que el aura aún tenía un espacio; el ser humano en crisis y traumatizado porque no encaja en un status quo nuevo.This paper delves into David Lodge’s Author, Author (2004) as an example of neo-Victorian celebrity biofiction, more concretely on Henry James. The genre belongs to the wave of Victorian revival in current literature which also affects cultural studies in general. My main contention is that Lodge’s novel responds to current cultural anxieties, particularly the crisis of identity and authorship and the end of Walter Benjamin’s concept of aura, by sublimating them into late-nineteenth-century traumata. The choice of James is, the article argues, not casual. He represents the redeeming figure of a lost auratic world; the human in crisis, traumatized because he does not fit in the new status quo
TRAUMATIC IDENTITY AND AURA IN DAVID LODGE’S AUTHOR, AUTHOR
No full textThis paper delves into David Lodge’s Author, Author (2004) as an example of neo-Victorian celebrity biofiction, more concretely on Henry James. The genre belongs to the wave of Victorian revival in current literature which also affects cultural studies in general. My main contention is that Lodge’s novel responds to current cultural anxieties, particularly the crisis of identity and authorship and the end of Walter Benjamin’s concept of aura, by sublimating them into late-nineteenth-century traumata. The choice of James is, the article argues, not casual. He represents the redeeming figure of a lost auratic world; the human in crisis, traumatized because he does not fit in the new status quo.Este artículo analiza la novela Author, Author (2004) de David Lodge como ejemplo de bioficción neo-victoriana centrada en una celebridad, en este caso concreto, Henry James. El género forma parte del renacimiento victoriano actual que afecta a los estudios culturales en su conjunto. Mi argumento central es que la novela de Lodge constituye una respuesta a las ansiedades culturales actuales, en particular a las que se refieren a la crisis identitaria y autoría literaria, así como a la pérdida del aura artística de Walter Benjamin, sublimándolas a través de los traumas de finales del siglo XIX. La elección de James, como demuestra el artículo, no es casual. Es el último representante de un mundo perdido en el que el aura aún tenía un espacio; el ser humano en crisis y traumatizado porque no encaja en un status quo nuevo
- …
