M\"obius function of semigroup posets through Hilbert series

In this paper, we investigate the M{\"o}bius function $\mu\_{\mathcal{S}}$ associated to a (locally finite) poset arising from a semigroup $\mathcal{S}$ of $\mathbb{Z}^m$. We introduce and develop a new approach to study $\mu\_{\mathcal{S}}$ by using the Hilbert series of $\mathcal{S}$. The latter enables us to provide formulas for $\mu\_{\mathcal{S}}$ when $\mathcal{S}$ belongs to certain families of semigroups. Finally, a characterization for a locally finite poset to be isomorphic to a semigroup poset is given.Comment: 11 page

Measurement and recording of magnetics fields at high altitudes

When a land-air misile is fired to pursuit a mobil target, quite a few variables play a key role in order to reach and neutralise the target in no-time. It is desired; nevertheless, this system requires an amount of time, fuel, real-time data analysis as well as a discriminator system, all these in order to reach the mobil target. This is why, in this work we present a study for a set of variables meassured in situ such as: the wind speed, magnetic field, pressure and humidity to generate logs that can be usuful for either civil and militar applications. The system is designed to meassure in situ a set of variables starting at 500 m up to 30 km. As a result of this study, all the information gathered can be feed into the missil main computer and with the info loaded, it can trace trajectories in which the efficiency of the engine, fuel and cargo reach the target. The low atmosphere system has the follow set of instruments: a barometer, accelerometer, gyroscope and a magnetometer as the sensor array. We are using an Intel Galileo board as the motherboard. The information collected is saved within a SD high density memory card

Making more flexible ATISMART+ model for traffic simulations using a CAS

Traffic simulations usually require the search of a path to join two different points. Dijkstra’s algorithm [1] is one of the most commonly used for this task due to its easiness and quickness. In [2, 3] we developed an accelerated time simulation of car traffic in a smart city using Dijkstra’s algorithm to compute the paths. Dijkstra’s algorithm provides a shortest path between two different points but this is not a realistic situation for simulations. For example, in a car traffic situa- tion, the driver may not know the shortest path to follow. This ignorance can be produced, among others, because one of the following two facts: the driver may not know the exact length of the lanes, or, even knowing the exact length, the driver may not know how to find the shortest path. Even more, in many cases, a mixture of both facts occurs. A more realistic simulation should therefore consider these kind of facts. The algorithm used to compute the path from one point to another in a traffic simulation might consider the possibility of not using the shortest path. In this talk, we use a new probabilistic extension of Dijkstra’s algorithm which covers the above two situations. For this matter, two different modifications in Di- jkstra’s algorithm have been introduced: using non-exact length in lanes, and the choice of a non-shortest path between two different points. Both modifications are used in a non-deterministic way by means of using probability distributions (classi- cal distributions such as Normal or Poisson distributions or even "ad hoc" ones). A precise, fast, natural and elegant way of working with such probability distributions is the use of a CAS in order to deal with exact and explicit computations. As an example of use of this extension of Dijkstra’s algorithm, we will show the ATISMART+ model. This model provides more realistic accelerated time sim- ulations of car traffics in a smart city and was first introduced in [4] and extended in [5]. This model was developed combining J AVA for the GUI and M AXIMA for the mathematical core of the algorithm. The studies developed in the above mentioned works, dealt with Poisson, Ex- ponential, Uniform and Normal distributions. In this talk we will introduce, as a novelty, the possibility of using other continuous probability distributions such as: Lognormal, Weibul, Gamma, Beta, Chi-Square, Student’s t, Z, Pareto, Lo- gistic, Cauchy or Irwin-Hall, and other discrete distributions such as: Bernouille, Rademacher, Binomial, Geometric, Negative Binomial or Hypergeometric. Even 1 more, this new version allows to deal with any “ad-hoc” continuous, discrete or mixed user’s distributions. This fact improves the flexibility of ATISMART+ model.Universidad de Málaga. Campus de Excelencia Internacional Andalucía Tech

Construction Cost Estimates for Residences in Spain: practical application of the Pcr.5n model

The construction cost estimation systems in Spain are undeveloped and, hence, infrequently used by technicians and professionals in the building sector. However, estimation of an approximate real cost prior to the execution of the work is compulsory under current legal regulations (Technical Building Code). Therefore, the development of research projects on construction cost estimation models such as the one described and demonstrated in this talk is extremely interesting

La vegetación de lagunas primaverales en las cercanías de Temuco (Cautín, Chile)

La vegetación de lagunas primaverales en las cercanías de Temuco (Cautín, Chile). Se estudió la vegetación de lagunas primaverales ubicadas en las serranías de Tromén al poniente de la ciudad de Temuco, Chile. El estudio se realizó usando la metodología fitosociológica tradicional y modernos métodos estadísticos multivariantes de clasificación y ordenación. Se determi-naron las siguientes asociaciones: Juncetum procerii, Mentho-Agrostietum capillaris, Eleocharitetum pachycarpae, Eleocharitetum macrostachyae, Gnaphalio-Polygonetum hydropiperoidis, Glycerietum multiflorae y Junco-Caricetum ripariae y las comunidades vegetales de Ludwigia peploides-Sagittaria montevidense, Eleocharis pachycarpa-Lythrum portula, Anthoxanthum utriculatum, Phyla nodiflora y Potamogeton pusillus. Estas asociaciones y comunidades se compararon en su distribución, en el origen de su flora y en sus espectros biológicos. La clasificación estadística coincidió con aquella realizada por el ordenamiento tradicional de la tabla fitosociológica inicial. La orde-nación multivariante permitió inferir que la humedad del suelo, la extensión del período de sequía estival y la materia orgánica del sustrato son los principales factores que regulan la distribución de las especies y asociaciones vegetales

Application of a building cost estimation model to the appraisal of the churches damaged by earthquakes in Lorca (Spain)

The objective of this paper is the development of a building cost estimation model whose purpose is to quickly and precisely evaluate rebuilding costs for historic heritage buildings affected by catastrophic events. Specifically, this study will be applied to the monumental buildings owned by the Catholic Church that were affected by two earthquakes on May 11, 2011 in the town of Lorca. To estimate the initial total replacement cost new, calculation model will be applied which, on the one hand, will use two-dimensional metric exterior parameters and, on the other, three-dimensional interior cubic parameters. Based on the total of the analyzed buildings, and considering damage caused by the seismic event, the final reconstruction cost for the building units ruined by the earthquakes can be estimated. The proposed calculation model can also be applied to other emergency scenarios and situations for the quick estimation of construction costs necessary for rebuilding historic heritage buildings which have been affected by catastrophic events that deteriorate or ruin their structural or constructive configuration

La dependencia de la verdad a las pasiones

Uno de los retos constantes de las ciencias sociales, y en especial, de lafilosofía, son las preguntas sobre qué es lo que el hombre ha creído y sobrelo que debería creer. Si bien, buena parte de las ciencias sociales podría leersedesde este par de preguntas, es en el campo de la filosofía, y en especial, en surelación con el concepto de verdad donde cobra un mayor despliegue. Desdela epistemología se afirma que debemos creer en lo verdadero, y se exponendos teorías que recogen los lugares comunes de la verdad: correspondentismoy coherentismo. En este trabajo se trata de mostrar que, en la vida social, ni laversión correspondentista ni la coherentista son lo suficientemente vinculantescomo para llevar a las personas a creer en lo que deberían creer, de acuerdocon los estándares de la epistemología. Se concluye que en el interés humanode aceptar y aprehender la verdad, para establecer qué se debe creer, esnecesario un cultivo de la voluntad. Así, se señala que la verdad, y con ella elcreer, involucra tanto a la razón como a la pasión

Hazard Perception and Prediction test for walking, riding a bike and driving a car: Understanding of the global traffic situation

To “put oneself in the place of other road users” may improve understanding of the global traffic situation. It should be useful enabling drivers to anticipate and detect obstacles in time to prevent accidents to other road users, especially those most vulnerable. We created a pioneering Hazard Perception and Prediction test to explore this skill in different road users (pedestrians, cyclists and drivers), with videos recorded in naturalistic scenarios: walking, riding a bicycle and driving a car. There were 79 participants (30 pedestrians, 14 cyclists, 13 novice drivers and 22 experienced drivers). Sixty videos of hazardous traffic situations were presented, divided into 2 blocks of 30 videos each: 10 walking, 10 riding a bicycle, 10 driving a car. In each situation presented, we evaluated the performance of the participants carrying out the task of predicting the hazard and estimating the risk. In the second block, after they had carried out the task, we gave them feedback on their performance and let them see the whole video (i.e., checking what happened next). The results showed that the holistic test had acceptable psychometric properties (Cronbach’s alpha = .846). The test was able to discriminate between the different conditions manipulated: a) between traffic hazards recorded from different perspectives: walking, riding a bicycle and driving a car; b) between participants with different user profiles: pedestrians, cyclists and drivers; c) between the two test blocks: the first evaluation only and the second combining evaluation with this complex intervention. We found modal bias effects in both Hazard Perception and Prediction; and in Risk Estimation.State Research Agency (SRA)European Regional Fund (ERDF