Looking for Simple Common Schemes to Design Recognizer P Systems with Active Membranes That Solve Numerical Decision Problems

Earlier solutions to decision problems by means of P systems used many counter objects to control the synchronization of different stages in a computation (usually as many counters as the stage must last in the worst case). In this paper we propose a way to replace those counters with some spacial objects for each stage. Furthermore, following the ideas presented in [1], in order to have a common scheme to attack numerical problems, all instances of a problem with the same size are solved by the same P system (which depends on the size) given an input which describes the corresponding instance of the problem. We illustrate these ideas with a cellular solution to the Subset-Sum problem

Juan Talavera de La Vega‘s plans of works derived from the land donation to create the Parque de María Luisa in Seville

Juan Talavera y de la Vega, arquitecto del Palacio de San Telmo, fue el responsable del diseño de las construcciones que debían realizarse en el palacio a consecuencia de la donación por parte de la infanta María Luisa Fernanda de un área de sus jardines a la ciudad de Sevilla para crear un parque público. En agosto de 1893, Talavera remitió al Ayuntamiento los planos que se analizan en estas páginas. Los adjuntaban a un informe donde explicaba la incidencia de la apertura de la nueva avenida que servía de límite a los terrenos cedidos y de la demolición de diferentes construcciones, en especial, el antiguo Convento de San Diego, dedicado a las caballerizas y estancias de servicios del palacio y las viviendas de su personal.María Luisa Fernanda, Duchess of Montpensier, donated an important part of her gardens of St. Telmo’s Palace to the city of Seville in order to create a public park. Juan Talavera de la Vega, chief architect of the palace, was responsible for the design of buildings to be carried out in the palace as a result of the cession. The plans we study in these pages, were submitted to Town Hall by in August 1893. They were attached to a report explaining the impact of opening the new avenue bordering the ceded lands, and demolishing different buildings dedicated to stables, palace service rooms and staff housing, especially the old St. Diego’s Convent

A New Strategy to Improve the Performance of PDP-Systems Simulators

One of the major challenges that current P systems simulators have to deal with is to be as efficient as possible. A P system is syntactically described as a membrane structure delimiting regions where multisets of objects evolve by means of evolution rules. According to that, on each computation step, the applicability of the rules for the current P system configuration must be calculated. In this paper we extend previous works that use Rete-based simulation algorithm in order to improve the time consumed during the checking phase in the selection of rules. A new approach is presented, oriented to the acceleration of Population Dynamics P Systems simulations.Ministerio de Economía y Competitividad TIN2012- 3743