482 research outputs found
El erotismo en la novela "Necrópolis" de Santiago Gamboa
No full textEl siguiente trabajo pretende analizar la presencia del erotismo en la novela “Necrópolis”, del narrador bogotano Santiago Gamboa. Para ello y buscando un apoyo teórico, en el escrito se aclaran las principales concepciones acerca de qué es el erotismo, importante dimensión de la vida humana, que aportan los pensadores y escritores elegidos, George Bataille, Octavio Paz y Michel Foucault, en sus respectivas obras: El erotismo, La llama doble e Historia de la sexualidad.
A continuación, se localiza la persona del escritor Santiago Gamboa con sus hechos biográficos más sobresalientes, ubicando su universo narrativo en el contexto de las letras colombianas contemporáneas.
Continúa el documento con una reseña crítica de la novela a estudiar, “Necrópolis”, valorando sus alcances y aportes a la narrativa nacional, para, por último, focalizar la manera en que se trabaja el erotismo en dos capítulos que son la mejor muestra para entender dicho manejo.
Uno de ellos titulado “El sobreviviente”, relato del empresario Moisés Kaplan, en donde se verá las estrategias narrativas empleadas y el acople con el concepto de deseo y sus variables; el otro capítulo es el titulado “Jardín de flores raras”, narración en primera persona, a cargo de Sabina Vedovelli, una diva del cine pornográfico, la cual ofrece pormenores de su vida y de su trabajo.
Se han tenido en cuenta, para tal fin, los acercamientos teóricos a dichas cuestiones, los cuales fueron útiles para consolidar visiones personales aplicadas al estudio de la mencionada obra. Se pudo apreciar así, gracias al acercamiento estético ofrecido por la obra literaria, cómo están de íntimamente ligados ciertos conceptos del orbe de lo erótico, de lo privado; con aquellas otras manifestaciones de la vida de cualquier individuo y que inciden potencialmente en su desenvolvimiento como ser humano.This study aims at analyzing the role of eroticism in the novel “Necrópolis” written by Santiago Gamboa, a writer from Bogotá, Colombia. Therefore, some theoretical support was examined in order to clarify key concepts about eroticism. In this regard, the definitions provided by George Bataille, Octavio Paz and Michel Foucault in their work Eroticism, The Double Flame, and History of Sexuality were mainly taken into account to conduct the present work.
Initially, the author Santiago Gamboa is introduced with his most outstanding biographical facts, placing his narrative universe in the context of contemporary Latin American literature. After that, the document shows a critical review of the novel "Necrópolis", assessing its scope and contributions to the national narrative. Finally, the study focuses on the way in which eroticism is addressed in two chapters that were taken to provide the reader with clear examples of the main concept.
The first chapter is entitled "The Survivor", it tells the story of a businessman called Moisés Kaplan. The chapter clearly exhibits narrative strategies used to address the concept of desire and its variables; the other chapter is entitled "Garden of rare flowers", a first-person narration by Sabina Vedovelli, a pornographic film diva, who offers details of her life and work.
Theoretical approaches regarding the main topic of this study have been taken into account, they have served to consolidate personal visions applied to the study of the aforementioned work. Thus, thanks to the aesthetic approach offered by the literary work, it is possible to appreciate how certain concepts of the orb of the erudition and the privacy are intimately linked with those other dimensions of any individual and how they potentially might affect people’s interactions.Magister en Estudios LiterariosMaestrí
Estimations of wave forces on crown walls based on wave overtopping rates
No full text[EN] In this study, seven input variables are used to estimate wave forces on the crown wall, and explanatory variables are ranked using neural network techniques. 274 small-scale 2D tests, including both wave overtopping and pressure on crown-wall measurements, were used to calibrate the wave force predictors. Wave overtopping (log Q) was the most relevant variable to estimate horizontal wave forces and overturning moments, while the relative foundation level (F-e/L-0p) was the most relevant variable to estimate wave up-lift forces. The new wave force estimators showed prediction errors slightly higher than the formulas given in the literature, but using fewer parameters and explanatory variables. The range of application of the new formulas is 1.67 < R-c/(gamma(f) H-m0) < 6.55, 1.39 < xi(0p) < 7.77, 0.36 < gamma(f) R-u0.1%/R-c < 1.41, 0.00 < (R-c-A(c))/C-h < 0.59, 2.64 < root L-m/G(c) < 6.54, 0.00 < F-c/ L-0p < 0.03 and -6.00 < logQ < -2.78. Compared to pressure on crown walls, the mean wave overtopping rate is relatively easy to measure in small-scale tests and prototypes. The new estimators of wave forces on the crown wall can be used to indirectly calculate forces on models when only overtopping rates are measured. If wave overtopping is one order of magnitude higher, the wave forces and overturning moments on the crown wall increase between 11% and 60%, considerably reducing the crown wall stability.The authors acknowledge financial support from European FEDER and Spanish Mirtisterio de Economia y Competitividad (Grant BIA2015-70436-R), SATO (OHL Group) and CDTI. The second author was funded through the FPU program (Formacion del Profesorado Universitario, Grant FP2013/01872) by the Spanish Ministerio de Educacion, Culturay Deporte. The authors thank Debra Westall for revising the manuscript.Molines, J.; Herrera Gamboa, MP.; Medina, JR. (2018). Estimations of wave forces on crown walls based on wave overtopping rates. Coastal Engineering. 132:50-62. https://doi.org/10.1016/j.coastaleng.2017.11.004S506213
A note on hyperplane sections of real algebraic sets
No full textThe author studies the size of the set of hyperplanes which meet a non- zero-dimensional algebraic set V over a real-closed ground field R. More precisely, let us denote by V\sb c the locus of central points of V, i.e., the closure, in the order topology of R\sp n, of the set of regular points of V. The author proves the following: There exists a linear isomorphism of R\sp n such that for every ``generic'' hyperplane H of R\sp n, either H meets V\sb c or its transform by meets V\sb c.Depto. de Álgebra, Geometría y TopologíaFac. de Ciencias MatemáticasTRUEpu
Toe berm design for very shallow waters on steep sea bottoms
No full textThe toe berm is a relevant design element when rubble mound breakwaters are built on steep sea bottoms in breaking conditions. Different design formulas can be found in the literature to predict the damage caused to submerged toe berms placed on gentle bottom slopes. However, these formulas are not valid for very shallow waters in combination with steep sea bottoms where toe berms receive the full force of breaking waves. To guarantee breakwater stability in these conditions, new design formulas are needed for toe berms. To this end, physical model tests were carried out and data were analyzed to characterize rock toe berm stability in very shallow water and with a bottom slope m = 1/10. Based on test results, a new formula was developed with three parameters to estimate the nominal diameter (Dn50) of the toe berm rocks: water depth at the toe (hs), deep water significant wave height (Hs0), and deep water wave length (L0p).The first author was financially supported through the FPU program (Formacion del Profesorado Universitario) funded by the Spanish Ministry of Education (Ministerio de Educacion, Cultura y Deporte) FPU13/01872. The authors also acknowledge financial support from the Spanish Ministry of Economy and Competitiveness (grant BIA2012-33967). The authors thank Debra Westall for revising the manuscript.Herrera Gamboa, MP.; Medina Folgado, JR. (2015). Toe berm design for very shallow waters on steep sea bottoms. Coastal Engineering. 103:67-77. https://doi.org/10.1016/j.coastaleng.2015.06.005S677710
Some new results on ordered fields
No full textThe author shows there is a non-Archimedean ordering of the field R(x, y), where x and y are algebraically independent over K, for which the identity is the only order-preserving automorphism.
The author proves the partly known result that the following statements about an ordered field K are equivalent: (1) each polynomial in K[x] satisfies the intermediate value theorem; (2) if f 2 K[x] and a < b, then f takes on its maximum value at some c 2 [a, b]; (3) K is real closed.
A (not necessarily ordered) field K is said to have the extension property if each automorphism of K(x), where x is transcendental over K, is an extension of an automorphism of K.
The author gives sufficient conditions for a field to have the the extension property. For example, a field has the extension property if, for some fixed integer n greater than two, each polynomial xn−ax−1, a 2 K, has a root in K.Depto. de Álgebra, Geometría y TopologíaFac. de Ciencias MatemáticasTRUEpu
Hydraulic stability of rock armors in breaking wave conditions
No full text[EN] Armor layers of mound breakwaters are usually designed with empirical formulas based on small-scale tests in non-breaking wave conditions. However, most rubble mound breakwaters are constructed in the depth-induced breaking zone, where they must withstand design storms having some percentage of large waves breaking before reaching the structure; in these cases, the design formulas for non-breaking wave conditions are not fully valid. To characterize double-layer rock armor damage in breaking wave conditions, 2D physical model tests were carried out with a bottom slope m=1/50. In order to develop a simple method to determine the wave parameters in the depth-induced breaking zone, experimental wave measurements were compared to the numerical estimations given by the SwanOne model. An analysis was conducted to select the best characteristic wave height to estimate rock armor damage when dealing with depth-induced breaking waves; the spectral significant wave height, Hm0, estimated at a distance of 3hs seaward from the structure toe, was found to be the most adequate. A new hydraulic stability formula is proposed for double-layer rock armors in breaking wave conditions, considering the observed potential 6-power relationship between the equivalent dimensionless armor damage and the Hm0 at 3hs seaward
distance from the structure toe.The authors acknowledge the financial support from the Spanish Ministry of Economy and Competitiveness (grants BIA2012-33967 and BIA2015-70436-R). The first author was financially supported through the FPU program (Formacion del Profesorado Universitario) funded by the Spanish Ministry of Education (Ministerio de Educacion, Cultura y Deporte) FPU13/01872. The authors thank Debra Westall for revising the manuscript.Herrera Gamboa, MP.; Gómez-Martín, ME.; Medina, JR. (2017). Hydraulic stability of rock armors in breaking wave conditions. Coastal Engineering. 127:55-67. https://doi.org/10.1016/j.coastaleng.2017.06.010S556712
Localized physical vapor deposition via focused laser spike dewetting of gold thin films for nanoscale patterning
No full textFocused laser spike (FLaSk) excitation has been demonstrated as a reliable technique for the patterning of micro-to-nanoscale features locally by thermocapillary shear of thin films. Recent work on polymer thin films has revealed that overlapping laser scans can leverage coupled thermal and fluid effects to create subwavelength patterns. Compared to polymeric films, metallic thin films possess both a lower melt viscosity and higher surface tension. Here we investigate overlapping effects in the dewetting of ~15 nm gold thin films on borosilicate and quartz glass substrates with a 532 nm continuous wave laser. During this process, FLaSk initiates capillary and thermocapillary dewetting simultaneously. Further, the low oxidation potential and high vapor pressure of gold lead to non-equilibrium vaporization during heating. Since the parameters of overlapping scans control the amount of material that is heated and to what temperature it is heated, selection of laser power, scanning distance, writing speed, and numerical aperture results in particles with different sizes and spacing deposited on the writing substrates or a positioned superstrate through a laser-induced localized physical vapor deposition (LILPVD) process. If the laser parameters are selected within a specific working range, uniform or periodic particle distributions can be repeatably deposited in this fashion, which can then be used as seeds for nanomaterial growth. In addition, if the substrate melts during FLaSk, the viscous forces of the liquid-on-liquid dewetting broadens the range of patterning conditions by resisting the motion of the gold leading to more uniform particles over a large range of parameters.Peer reviewe
A Characterization Of Rational And Elliptic Real Algebraic-Curves In Terms Of Their Space Of Orderings
No full textLet K be a formally real field with space of orderings X(K). Then Aut(K) operates on X(K). K is said to have the ”dense orbits property” if for any x 2 X(K) the orbit of
x is dense in X(K). Fields with the dense orbits property were introduced by D. W.
Dubois and T. Recio in Contemp. Math. 8, 265-288 (1982; Zbl 0484.12003) under the name of Q1-fields. They were further studied by the author and T. Recio [J. Pure Appl.
Algebra 30, 237-246 (1983; Zbl 0533.12018)]. In the present paper the dense orbits property is studied for function fields of real algebraic varieties. So, let V be a real
algebraic variety over the field R of real numbers, R(V ) the function field of V. It is proved that Aut(R(V )) is infinite if R(V ) has the dense orbits property. If V is a curve then R(V ) has the dense orbits property if and only if V is a rational or elliptic curve.Depto. de Álgebra, Geometría y TopologíaFac. de Ciencias MatemáticasTRUEpu
Thermocapillary Multidewetting of Thin Films
No full textThermocapillary dewetting of liquids and molten films has recently emerged as a viable alternative to conventional microprocessing methods. As this thermal gradient-induced mechanism is universal, it can be applied to any material. This work explores the sequential dewetting of materials with varying melting points, including polymers and metals, to create aligned morphologies. The variation in melting point allows for the dewetting of single layers at a time or mobility-limited simultaneous dewetting. As a result, a variety of multimaterial structures can be produced with built-in alignment, such as arrays of concentric circles, lines with periodic segmentation, or islands on holes. This approach employs photothermal methods to induce the necessary thermal gradient, manipulating several variables in order to influence the consequent structures. Adjusting laser power and light intensity allows for the control of temperature for selective dewetting of films; altering beam size and exposure time affects the extent of dewetting in terms of diameter size; overlap effects and simultaneous dewetting can result in complex architectures. This controlled writing of patterns also presents a technique to create both masks at low temperatures for conductive multilayers as well as templates for electrospray deposition.Peer reviewe
Placement, porosity and randomness of cube and Cubipod armor layers
No full textAlthough little attention is usually given to the armor porosity and armor randomness of randomly placed concrete armor units in mound breakwaters, significant model effects may occur if armor porosity and randomness are different for prototype and small-scale models. Armor randomness and porosity are easier to control in small-scale models because they are generally constructed by hand in dry and perfect viewing conditions; equipment and environmental constraints make control at prototype scale more difficult. Results from three-dimensional small-scale placement tests are analyzed when cube and Cubipod units are placed with a small-scale crawler crane and pressure clamps. Armor porosity was not workable below 37% for cubes and 35% for Cubipods; placement grids were obtained for feasible armor porosities, considering row settlements during construction as well. Amethodology to measure armor randomness using high-precision laser scanning, similar to terrestrial LIDAR, was tested with small-scale cube and Cubipod armor. Three armor randomness indexes (ARIs) measured the randomness of cube and Cubipod armor; the values for ARIs were higher for Cubipod armor than for cube armor. (C) 2014 American Society of Civil EngineersThe authors would like to acknowledge the financial support received from the CDTI (CUBIPOD and CLIOMAR Projects), SATO-OHL Group (CLIOMAR Project), and the Spanish Ministry of Economy and Competitiveness (Grant BIA2012-33967). The third author was financially supported through the FPU program (Formacion del Profesorado Universitario) funded by the Spanish Ministry of Education (Ministerio de Educacion, Cultura y Deporte). The authors thank Tomas J. Perez for assisting with the 3D placement tests and processing the laser-scanner data, and Debra Westall for revising the manuscript.Pardo De Gregorio, V.; Herrera Gamboa, MP.; Molines Llodra, J.; Medina Folgado, JR. (2014). Placement, porosity and randomness of cube and Cubipod armor layers. Journal of Waterway, Port, Coastal, and Ocean Engineering. 140(5). doi:10.1061/(ASCE)WW.1943-5460.0000245S140
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