60 research outputs found

    Commonsense Knowledge in Sentiment Analysis of Ordinance Reactions for Smart Governance

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    Smart Governance is an emerging research area which has attracted scientific as well as policy interests, and aims to improve collaboration between government and citizens, as well as other stakeholders. Our project aims to enable lawmakers to incorporate data driven decision making in enacting ordinances. Our first objective is to create a mechanism for mapping ordinances (local laws) and tweets to Smart City Characteristics (SCC). The use of SCC has allowed us to create a mapping between a huge number of ordinances and tweets, and the use of Commonsense Knowledge (CSK) has allowed us to utilize human judgment in mapping. We have then enhanced the mapping technique to link multiple tweets to SCC. In order to promote transparency in government through increased public participation, we have conducted sentiment analysis of tweets in order to evaluate the opinion of the public with respect to ordinances passed in a particular region. Our final objective is to develop a mapping algorithm in order to directly relate ordinances to tweets. In order to fulfill this objective, we have developed a mapping technique known as TOLCS (Tweets Ordinance Linkage by Commonsense and Semantics). This technique uses pragmatic aspects in Commonsense Knowledge as well as semantic aspects by domain knowledge. By reducing the sample space of big data to be processed, this method represents an efficient way to accomplish this task. The ultimate goal of the project is to see how closely a given region is heading towards the concept of Smart City

    Morphological Phase Separation in Unstable Thin Films: Pattern Formation and Growth

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    We present results from a comprehensive numerical study of {\it morphological phase separation} (MPS) in unstable thin liquid films on a 2-dimensional substrate. We study the quantitative properties of the evolution morphology via several experimentally relevant markers, e.g., correlation function, structure factor, domain-size and defect-size probability distributions, and growth laws. Our results suggest that the late-stage morphologies exhibit dynamical scaling, and their evolution is self-similar in time. We emphasize the analogies and differences between MPS in films and segregation kinetics in unstable binary mixtures.Comment: 17 pages, 6 figures; Accepted for publication in Physical Chemistry Chemical Physic

    Spinodal Phase Separation in Liquid Films with Quenched Disorder

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    We study spinodal phase separation in unstable thin liquid films on chemically disordered substrates via simulations of the thin-film equation. The disorder is characterized by immobile patches of varying size and Hamaker constant. The effect of disorder is pronounced in the early stages (amplification of fluctuations), remains during the intermediate stages and vanishes in the late stages (domain growth). These findings are in contrast to the well-known effects of quenched disorder in usual phase-separation processes, viz., the early stages remain undisturbed and domain growth is slowed down in the asymptotic regime. We also address the inverse problem of estimating disorder by thin-film experiments.Comment: 12 pages, 7 figure

    Kinetics of Spinodal Phase Separation in Unstable Thin Liquid Films

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    We study universality in the kinetics of spinodal phase separation in unstable thin liquid films, via simulations of the thin film equation. It is shown that in addition to morphology and free energy,the number density of local maxima in the film profile can also be used to identify the early, intermediate and late stages of spinodal phase separation. A universal curve between the number density of local maxima and rescaled time describes the kinetics of early stage in d = 2, 3. The Lifshitz-Slyozov exponent of -1/3 describes the kinetics of the late stage in d = 2 even in the absence of coexisting equilibrium phases.Comment: 5 figure

    Amplification of Fluctuations in Unstable Systems with Disorder

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    We study the early-stage kinetics of thermodynamically unstable systems with quenched disorder. We show analytically that the growth of initial fluctuations is amplified by the presence of disorder. This is confirmed by numerical simulations of morphological phase separation (MPS) in thin liquid films and spinodal decomposition (SD) in binary mixtures. We also discuss the experimental implications of our results.Comment: 15 pages, 4 figure

    SubFoveal Choroidal Imaging in High Myopic Nepalese Cohort

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    Current image captioning models produce fluent captions, but they rely on a one-size-fits-all approach that does not take into account the preferences of individual end-users. We present a method to generate descriptions with an adjustable amount of content that can be set at inference-time, thus providing a step toward a more user centered approach to image captioning

    Double intra venous cannula versus single needle technique of aspiration and methylprednisolone injection in the treatment of wrist ganglion: a comparative study

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    Background: Ganglion is the one of the common soft tissue swellings in the hand and wrist. Treatment options available include reassurance, nonsurgical means like aspiration with or without steroid or hyaluronidase injection and surgical or arthroscopic excision. All current treatment options produce suboptimal results. This study endeavours to compare the outcome and recurrence rate and other complications after treatment of wrist ganglion by aspiration and methylprednisolone injection by double Intravenous cannula versus single needle technique.Methods: A prospective comparative clinical study was done with a total of 72 patients. 36 patients in group 1 were treated with double intravenous cannula technique and 36 patients in group 2 were treated with single needle technique. All the patients were followed up for 6 months to look for recurrence and any complication. The patient’s age, sex and various characteristics of the ganglion cyst like side, site, size, etc. were recorded.Results: In group 1, recurrence was seen in 6 patients (15.7%) while in group 2, recurrence were seen in 14 (38.8%) patients. There was statistical significant difference between the two groups with p value of 0.04. No complication was seen in both groups due to methylprednisolone injection.Conclusions: Inspired by the results we advise to use aspiration and methylprednisolone injection by double intravenous cannula technique in the treatment of wrist ganglion before any surgical intervention. It is safe, simple, cost effective method and is less invasive and less time consuming with recurrence rate comparable to surgical and arthroscopic interventions

    Conocimientos, Actitudes y Prácticas sobre lactancia materna que poseen las madres que asisten al programa de Vigilancia promoción, crecimiento y desarrollo en el centro salud de Villa Libertad, Managua. Octubre -Diciembre 2015

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    Se determinaron los conocimientos, actitudes y prácticas sobre lactancia materna que poseen las madres que asisten al programa de Vigilancia, Promoción, Crecimiento y Desarrollo, mediante un estudio descriptivo de corte transversal, probabilístico, realizado en 73 mujeres en rangos de edad de 15 a 42 años, seleccionadas por muestreo aleatorio simple en el Centro de Salud Villa Libertad de la ciudad de Managua en el periodo de Octubre a Diciembre del año 2015. Una vez seleccionada el área de estudio se realizó coordinación con personal de salud y docente a cargo, se identificó el problema objeto de la investigación, se procedió a la elaboración de los objetivos y del instrumento de recolección de datos, posteriormente se hizo la validación del mismo. La entrada al escenario de trabajo para la evaluación se realizó aplicando el formulario conteniendo las variables de acuerdo a cada objetivo específico, los cuales están enmarcados en cuanto a identificar información sociodemográfica, de conocimientos, actitudes y prácticas sobre lactancia materna. Se utilizaron medios y programas informáticos para el proceso de recolección y análisis de datos. Una vez analizada la información se obtuvieron los resultados, donde encontramos que las mujeres estudiadas manifestaron tener adecuados conocimientos sobre lactancia materna obtenidos en la unidad de salud donde han sido atendidas, tienen una actitud favorable, pero la práctica de lactancia materna es inadecuada, porque es mixta debido a que además de la leche materna se implementa el uso de fórmulas lácteas y alimentación complementaria a temprana edad. Palabras Clave: Lactancia Materna, Conocimientos, Actitudes, Prácticas, Fórmul

    Cell Encapsulation in Sub-mm Sized Gel Modules Using Replica Molding

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    For many types of cells, behavior in two-dimensional (2D) culture differs from that in three-dimensional (3D) culture. Among biologists, 2D culture on treated plastic surfaces is currently the most popular method for cell culture. In 3D, no analogous standard method—one that is similarly convenient, flexible, and reproducible—exists. This paper describes a soft-lithographic method to encapsulate cells in 3D gel objects (modules) in a variety of simple shapes (cylinders, crosses, rectangular prisms) with lateral dimensions between 40 and 1000 μm, cell densities of 105 – 108 cells/cm3, and total volumes between 1×10−7 and 8×10−4 cm3. By varying (i) the initial density of cells at seeding, and (ii) the dimensions of the modules, the number of cells per module ranged from 1 to 2500 cells. Modules were formed from a range of standard biopolymers, including collagen, Matrigel™, and agarose, without the complex equipment often used in encapsulation. The small dimensions of the modules allowed rapid transport of nutrients by diffusion to cells at any location in the module, and therefore allowed generation of modules with cell densities near to those of dense tissues (108 – 109 cells/cm3). This modular method is based on soft lithography and requires little special equipment; the method is therefore accessible, flexible, and well suited to (i) understanding the behavior of cells in 3D environments at high densities of cells, as in dense tissues, and (ii) developing applications in tissue engineering
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