35 resultados para HEURÍSTICA


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This paper proposes an heuristic for the scheduling of capacity requests and the periodic assignment of radio resources in geostationary (GEO) satellite networks with star topology, using the Demand Assigned Multiple Access (DAMA) protocol in the link layer, and Multi-Frequency Time Division Multiple Access (MF-TDMA) and Adaptive Coding and Modulation (ACM) in the physical layer.

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En aquest projecte, es realitza un anàlisi d'usabilitat de les pàgines webs de cooperatives de fruita i oli de Lleida. Per mitjà de dues tècniques, l'anàlisi de les pàgines principals i l'avaluació heurística, es detecten els problemes d'usabilitat més comuns en pàgines d'aquest sector i es donen unes recomanacions de millora.

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El trabajo consiste en el desarrollo de una aplicación que permita gestionar evaluaciones heurísticas de diferentes proyectos. Debe almacenar la información del proyecto y de los evaluadores, la heurística empleada, la evaluación y los resultados de la misma.

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Analitza la usabilitat de la web del diari Segre, l'aplicació e-Segre i la plana web Cercle. Per realitzar aquest anàlisi s'han utilitzat dues tècniques: realització d'una avaluació heurística amb experts i realització de tests d'usuaris mitjançant l'Eye tracking. Tots aquests tests i avaluacions s'han dut a terme per poder arribar a una conclusió final.

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Business processes designers take into account the resources that the processes would need, but, due to the variable cost of certain parameters (like energy) or other circumstances, this scheduling must be done when business process enactment. In this report we formalize the energy aware resource cost, including time and usage dependent rates. We also present a constraint programming approach and an auction-based approach to solve the mentioned problem including a comparison of them and a comparison of the proposed algorithms for solving them

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Usability is critical to consider an interactive software system successful. Usability testing and evaluation during product development have gained wide acceptance as a strategy to improve product quality. Early introduction of usability perspectives in a product is very important in order to provide a clear visibility of the quality aspects not only for the developers, but also for the testing users as well. However, usability evaluation and testing are not commonly taken into consideration as an essential element of the software development process. Then, this paper exposes a proposal to introduce usability evaluation and testing within a software development through reuse of software artifacts. Additionally, it suggests the introduction of an auditor within the classification of actors for usability tests. It also proposes an improvement of checklists used for heuristics evaluation, adding quantitative and qualitative aspects to them

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Aquest treball pretén analitzar l’ús dels procediments heurístics i els seus biaixos. Per això, hemrealitzat un estudi entre dues poblacions: 4rt d’Humanitats i 4rt d’ECO/ADE. Per dur a termeaquesta comparació hem realitzat una enquesta que pretenia detectar els biaixos. Amb elsresultats hem pogut comprovar que efectivament hi ha diferències significatives entre els dosgrups. Concretament, els estudiants d’ECO/ADE cometen menys biaixos.

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La investigación psicológica de los procesos cognitivos y su configuración especifica a partir del lenguaje se encuentra en el límite de la pregunta filosófica acerca de la relación lenguaje-pensamiento-realidad y de la preocupación epistemológica por esclarecer la interconexión de las teorias científicas y los datos observacionales o experimentales, la lógica interna del proceso científic0 y las posibilidades de elaboración de una heurística que facilite el establecimiento de patrones de descubrimiento. Aunque conviene delimitar los distintos campos, la perspectiva global de esta problemática permite fecundar nuevos proyectos de estudio. La Escuela de Würzburg nos ofrece un buen ejemplo de investigaciones diversas sobre estos temas, en las que se procede unas veces intensivamente (de forma muy especifica) y otras veces de manera extensiva. En el articulo se da una información general de 10s principales autores de la Escuela, se entra en la consideración de las tesis centrales que Külpe expuso en su libro Die Realisierung y se destaca la importancia concedida a 10s trabajos de Karl Bühler por parte de teóricos de la ciencia como Popper y Hans Albert.

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Aquest treball es portarà a terme realitzant una avaluació heurística dels sistmes operatius seleccionats i de les seves aplicacions, un test d'usabilitat i un anàlisi de l'organització de les funcions mitjançant un card sorting on-line.

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We find that the vast majority of students taking an advanced undergraduate finance course show a preference for luck in a classroom experiment. In Phase I of the experiment part of the students, group A, were asked to guess a coin toss five times in a row. In Phase II the rest of the students, group B, were given 10 EUR to bet on some of the Group A students taking a second go at guessing a sequence of five coin tosses (Phase III). Group B students’ bets were by default allocated to the worse performing student in Phase I. Switching to better performing Group A students was costly. A total of 23 out of 28 students were willing to pay for switching and thus showed a preference for luck.

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In this paper, a hybrid simulation-based algorithm is proposed for the StochasticFlow Shop Problem. The main idea of the methodology is to transform the stochastic problem into a deterministic problem and then apply simulation to the latter. In order to achieve this goal, we rely on Monte Carlo Simulation and an adapted version of a deterministic heuristic. This approach aims to provide flexibility and simplicity due to the fact that it is not constrained by any previous assumption and relies in well-tested heuristics.

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In this paper, a hybrid simulation-based algorithm is proposed for the StochasticFlow Shop Problem. The main idea of the methodology is to transform the stochastic problem into a deterministic problem and then apply simulation to the latter. In order to achieve this goal, we rely on Monte Carlo Simulation and an adapted version of a deterministic heuristic. This approach aims to provide flexibility and simplicity due to the fact that it is not constrained by any previous assumption and relies in well-tested heuristics.

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The World Wide Web, the world¿s largest resource for information, has evolved from organizing information using controlled, top-down taxonomies to a bottom up approach that emphasizes assigning meaning to data via mechanisms such as the Social Web (Web 2.0). Tagging adds meta-data, (weak semantics) to the content available on the web. This research investigates the potential for repurposing this layer of meta-data. We propose a multi-phase approach that exploits user-defined tags to identify and extract domain-level concepts. We operationalize this approach and assess its feasibility by application to a publicly available tag repository. The paper describes insights gained from implementing and applying the heuristics contained in the approach, as well as challenges and implications of repurposing tags for extraction of domain-level concepts.

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Fer un estudi d'usabilitat del Repositori Obert de la UdL. El repositori recull, gestiona, difon i preserva les publicacions en format digital i en accés obert derivades de l'activitat acadèmica i investigadora, les publicacions institucionals i altres materials de la comunitat universitària.

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En la literatura sobre determinación subjetiva de funciones de densidad de probabilidad (f.d.p.) de rendimientos de cultivos, se ha señalado que los agricultores tienden a percibir f.d.p. muy «estrechas» (con varianza baja), un resultado que coincide con el señalado en otros contextos experimentales. En este trabajo se ha constatado que investigadores y expertos en producción vegetal tienen también una pobre percepción de la forma de la f.d.p. Este sesgo en la percepción de la f.d.p. sería compartido por agricultores y expertos, estos últimos con una buena formación estadística. Sin embargo ambos grupos realizan un trabajo diario exitoso que implica frecuentemente discriminar entre f.d.p. de rendimientos de cultivos.