Resistencia a la abrasión superficial de un suelo no cohesivo estabilizado con cemento.

Proyecto de Graduación. (Licenciatura en Ingeniería en Construcción). Instituto Tecnológico de Costa Rica. Escuela de Ingeniería en Construcción, 2010.En este trabajo se propone una metodología de trabajo con el fin de evaluar en un suelo-cemento, su resistencia a la abrasión. Se propone para este fin utilizar los criterios planteados en las Normas INTE 06-02-15-07 (Resistencia a la brasión en adoquines) y ASTM C 944-99 (Resistencia a la abrasión en superficies de concreto y de mortero). El material utilizado es un material clasificado como A-1-a, no plástico y con un 8% del peso total del suelo pasando a través del tamiz de la malla #200. Para evaluar la resistencia a la compresión, se elaboraron tres probetas para fallar a los 7, 14 y 28 días y para los siguientes porcentajes de cemento: 4, 6, 8, 10 y 12%. Con las pruebas se comprobó que esta resistencia aumenta con la edad y con el contenido de cemento de la mezcla. La resistencia al intemperismo se evaluó también para cada uno de los porcentajes de cemento anterior mediante la Norma ASTM D 559-03 (Ensayo ciclos de saturación-secado). Con esta prueba se logró demostrar que los valores registrados de pérdida en peso de las probetas, disminuye al aumentar el contenido de cemento. Según la Norma INTE 06-02-15-07, los resultados obtenidos para la resistencia a la abrasión muestran un patrón de comportamiento aleatorio que impide establecer la relación que guarda esta propiedad, con la edad y el contenido de cemento de la mezcla. Los resultados obtenidos en la prueba de abrasión con la Norma ASTM C 944-99 demuestran que para un suelo-cemento, la pérdida en peso debida a la acción de la abrasión disminuye al aumentar el contenido de cemento de la mezcla. Se define un porcentaje teórico de estabilización con cemento para este tipo de suelo de 8%, con el fin de empezar con las pruebas de campo de este material.Instituto Tecnológico de Costa Rica. Escuela de Ingeniería en Construcción

Euronet Lab, A Cloud V-Lab Enviroment

In this paper we present a proposal for the creation of a European V-labs web space. In its essence it would result in an open online laboratory, with a primarily practical nature. In this laboratory students will have the opportunity to develop skills in the “know-how-to-do” area, enabling them to conduct a series of practical experiences in “try-out” philosophy that will substantiate and consolidate all knowledge that the students acquired in lectures. It is quite possible that these resources aren’t available in all universities and institutions, specifically in the university where the student is. This environment provides substance to the Directive stated in the declarations of Bologna and Prague that expresses “the teaching process is therefore student-centered”, strengthening the final pedagogical aim of “learning to learn”, as lifelong learning is assumed as an indispensable stage. What we propose is the creation of a virtual environment for e-learning where a series of virtual labs in many areas of electronics, automation and robotics are available, in this environment it will do possible for any student of any of these universities to scheduling of experience in any institution that belongs to this cloud, and thus can perform is work for anytime that will be available and with technical resources available or not available in its own university.Com o apoio RAADRI

Using ICT to support reflection in pre-service mathematics teacher education

This paper analyses a virtual supervision setting (e-mail and forum) during the practicum in a pre-service secondary school mathematics teacher education program. It is a study of the authors’ own professional practice using a qualitative-interpretative approach and case studies of student teachers. The results show that the setting was significant for pre-service teachers who had a more reflective attitude, but was seen as a burden by the others. The forum enabled fruitful reflections and discussions and e-mail was mostly used for organizational matters. In the future, attention must be paid to the role of the educational supervisor in fostering participation in the forum and use of e-mail.Este artigo analisa um dispositivo de supervisão virtual (e-mail e fórum) durante o estágio num curso de formação inicial de professores de Matemática do ensino secundário. É um estudo dos autores sobre a sua própria prática profissional usando uma abordagem qualitativa e interpretativa e estudos de casos de futuros professores. Os resultados mostram que o dispositivo foi significativo para os futuros professores que tinham uma atitude mais reflexiva mas foi visto como um “peso” pelos outros futuros professores. O fórum permitiu reflexões frutuosas e discussões e o e-mail foi principalmente usado para matérias organizacionais. No futuro, deve ser dada atenção ao papel do supervisor educacional em promover a participação no fórum e o uso do e-mail

Ontology: a support structure for a V-Labs Network, the Euronet - Lab

This paper presents work on the establishment of a virtual laboratories network, based on the concept of Virtual Closet that will contain all the elements and parts required to build the different experiences available in a vlabs network (that we call Euronet-Lab). To build this complex network it is necessary to find an adequate support. The large database of v-labs and independent elements that can integrate this structure allows the “recycling” of elements for purposes diverse from those they were originally created. This means to “re-use” the same element several times in different scenarios. In order to do this, it is necessary to have a structure that allows multiple instances of the same component. This paper will discuss the ontology essential to the establishment of such a network in order to standardize concepts and create uniform components description that supports the interaction between heterogeneous systems using shared parts or circuits.Com o apoio RAADRI

The use of an ontology as support of a virtual lab and remote labs network Euronet - Lab

Our propose is to build a network of virtual laboratories, based in a Virtual Closet that will contain all the elements and parts that are needed to build the various experiences available in a v-labs network (that we call Euronet-Lab). To build this complex network we need to find a system that supports effectively this structure. This probably will be a enormous database of v-labs and independent elements, where will be possible sometimes to “recycle” some of the elements. This means “re-use” the same element several times in many experiences. To do this is necessary to have a structure that allows us to have several instances of the same element. It’s important that in our structure and virtual environment we can create several “images” of the same reality and this images can be used simultaneously in different circuits/experiments. This means that we can create several instances of the same element, to be used in different experiences and exercises.Com o apoio RAADRI

The use of an ontology as support of a virtual lab and remote labs network Euronet - Lab

Our propose is to build a network of virtual laboratories, based in a Virtual Closet that will contain all the elements and parts that are needed to build the various experiences available in a v-labs network (that we call Euronet-Lab). To build this complex network we need to find a system that supports effectively this structure. This probably will be a enormous database of v-labs and independent elements, where will be possible sometimes to “recycle” some of the elements. This means “re-use” the same element several times in many experiences. To do this is necessary to have a structure that allows us to have several instances of the same element. It’s important that in our structure and virtual environment we can create several “images” of the same reality and this images can be used simultaneously in different circuits/experiments. This means that we can create several instances of the same element, to be used in different experiences and exercises.Com o apoio RAADRI

Circular economy, sharing, and sustainability: challenges for the social economy in a territory that wants to become a smart region

This study aims to analyse the predisposition of social economy agents to resource sharing. To achieve this, it was chosen to implement an exploratory qualitative approach directed to managers and an exploratory quantitative approach directed to employees. The results allowed to estimate that they do have a significant economic impact on number, paid work and business volume. It was shown the relationship between the interest demonstration on sharing and the appropriate qualification for the jobs of managers and employees. It was demonstrated the practice of informal and non-regulated sharing of own and third parties’ resources, among close partners, without the existence of a management model of knowledge, assets, time, use/reuse and exploitation. It is anticipated that the study could serve as scientific/methodological basis for a regional investment project, R&D and establishment of partnerships, reconciling interest in a smart region, as well as the application of circular economy principles.The authors are grateful to the Foundation for Science and Technology (FCT, Portugal) for financial support by national funds FCT/MCTES to UNIAG, under Project no. UIDB/04752/2020.info:eu-repo/semantics/publishedVersio

Ocaso de una noble familia romana: edición crítica y traducción de las "Epistulae consolatoriae" (1465- 1468) a Francesco dell’Anguillara, conde de Everso,preso en el castillo romano de Sant’Angelo

Critical edition and spanish translation of the comforting letters written by Bartholomaeus Platina and Rodericus sanctius de Arevalo to the count Francesco dell’Anguillara as reply to his request of comfort and freedom during his imprisonment in castel sant’Angelo. Before the critical edition appears a study of the Anguillara family and the circumstances leading to the imprisonment of Francesco.Edición crítica y traducción de las cartas consolatorias que escribieron Bartolomeo Platina y Rodrigo Sánchez de Arévalo al conde Francesco dell’Anguillara en respuesta a la petición de consuelo y libertad durante su encarcelamiento en castel sant’Angelo. Precede a la edición un estudio de la familia Anguillara y de las circunstancias que condujeron al encarcelamiento de Francesco

The effect of drivers gender on the perception of Portuguese road safety communication campaigns

The road safety campaigns use a range of media and marketing communication techniques to alert drivers to take appropriate behavior on the road. The aim of this study was to investigate how gender differences influence the behavior and attitude of the Portuguese drivers regarding driving as well as the attitude toward the road safety campaigns. In Portugal, there are no studies that analyze the gender difference related to road safety, which reinforces its relevance. To implement this purpose, firstly it was described the profile of drivers by gender regarding a set of behavioral variables. The attitude of drivers toward the road safety communication campaigns was analyzed and drivers were grouped by clusters, aiming its characterization as possible targets of communication actions for road safety marketing

A Network and Repository for Online Laboratory based on Ontology

Our propose is to build a network of virtual laboratories and also use it as a global repository of online laboratory’s and experiences. This set of virtual and online laboratories can be “stored” in an “virtual closet”, and also the system will allow us to build new experiences and online laboratories, and store them is this “virtual closet”. With the drawing of this new standard we pretend define methods for storing and retrieving learning objects for remote laboratories. The objective of this standard is also define methods for linking learning objects to design and implement smart learning environments for remote online laboratories. The objects defined by this standard are, for example, interfaces for devices connected to user computers over computers networks and the devices themselves. They are also learning scenarios or collaboration tools for communications necessary to conduct an activity of practical online laboratory work, they will allow to design and implement mechanisms that make smart learning environment formed by the ad hoc aggregation of learning objects taking always into account the pedagogical context for their use. This will allow to easy design and implement the pedagogically driven remote laboratory environment and experiments as also is learning environments. The experiences and laboratories are build using the parts and separate components that we have in a separate “virtual closet” with parts, components, and already build experiences. To build this complex network we need to find a system that supports effectively this structure. This probably will be a enormous database of v-labs and independent elements, where will be possible sometimes to “recycle” some of the elements. For this structure we propose an Ontology because it allows to “re-use” the same element several times in many experiences, and provide a very detailed description of each kind of element through is classes and sub-classes.Com o apoio RAADRI