Security in online learning assessment towards an effective trustworthiness approach to support e-learning teams

(c) 2014 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other users, including reprinting/ republishing this material for advertising or promotional purposes, creating new collective works for resale or redistribution to servers or lists, or reuse of any copyrighted components of this work in other works.This paper proposes a trustworthiness model for the design of secure learning assessment in on-line collaborative learning groups. Although computer supported collaborative learning has been widely adopted in many educational institutions over the last decade, there exist still drawbacks which limit their potential in collaborative learning activities. Among these limitations, we investigate information security requirements in on-line assessment, (e-assessment), which can be developed in collaborative learning contexts. Despite information security enhancements have been developed in recent years, to the best of our knowledge, integrated and holistic security models have not been completely carried out yet. Even when security advanced methodologies and technologies are deployed in Learning Management Systems, too many types of vulnerabilities still remain opened and unsolved. Therefore, new models such as trustworthiness approaches can overcome these lacks and support e-assessment requirements for e-Learning. To this end, a trustworthiness model is designed in order to conduct the guidelines of a holistic security model for on-line collaborative learning through effective trustworthiness approaches. In addition, since users' trustworthiness analysis involves large amounts of ill-structured data, a parallel processing paradigm is proposed to build relevant information modeling trustworthiness levels for e-Learning.Peer ReviewedPostprint (author's final draft

¿Cuál es el futuro del aprendizaje móvil en la educación?

Les tecnologies sense fil i les aplicacions per a dispositius mòbils en l’ensenyament superior han experimentat un creixement espectacular. Per a molts educadors, la tecnologia mòbil en el camp de l’ensenyament i l’aprenentatge s’ha convertit en un dels principals àmbits de recerca. Avui, l’aprenentatge mòbil és un àmbit estratègic per a moltes organitzacions que tenen competències educatives. En el futur, caldrà intensificar les investigacions per tal de transformar l’educació mitjançant l’aprenentatge mòbil. L’aparició de nous tipus de dispositius planteja problemes per a l’educació, facin el que facin el personal docent i les institucions educatives. Per tant, és essencial dur a terme una anàlisi, des d’una perspectiva tecnològica i pedagògica, per a garantir-ne l’ús i la implantació apropiats.  Aquesta secció especial de RUSC. Revista de Universidad y Sociedad del Conocimiento presenta una visió general d’experiències reeixides d’aprenentatge mòbil en l’ensenyament superior. L’objectiu és compartir bones pràctiques i crear noves oportunitats a les universitats. Aquestes aplicacions mòbils afegiran un nou estrat als processos d’aprenentatge i ensenyament.The evolution of wireless technologies and the development of applications for mobile devices in higher education have been spectacular. For many educators, mobile technology in the field of teaching and learning has recently become one of the most important areas of research. Today, mobile learning is a strategic topic for many organizations concerned with education. In the future, more research should be conducted to transform education using mobile learning. The advent of new types of devices is disruptive to education, no matter what educators and education institutions do. Therefore, a thorough analysis, from a pedagogical and technological perspective, is key to ensuring appropriate usage and implementation of mobile learning.This Special Section of RUSC. Universities and Knowledge Society Journal presents a general overview of successful mobile learning experiences in higher education. Its aim is to share best practices and create new opportunities in universities. These mobile applications will add another layer to the learning and teaching processes.Las tecnologías inalámbricas y las aplicaciones para dispositivos móviles en la educación superior han experimentado un crecimiento espectacular. Para muchos educadores, la tecnología móvil en el campo de la enseñanza y el aprendizaje se ha convertido en uno de los principales ámbitos de investigación. Hoy, el aprendizaje móvil es un ámbito estratégico para muchas organizaciones que tienen competencias educativas. En el futuro, habrá que intensificar las investigaciones para transformar la educación mediante el aprendizaje móvil. La aparición de nuevos tipos de dispositivos plantea problemas para la educación, independientemente de lo que hagan el personal docente y las instituciones educativas. Por lo tanto, es esencial llevar a cabo un análisis, desde una perspectiva tecnológica y pedagógica, para garantizar el uso y la implementación apropiados. Esta sección especial de RUSC. Revista de Universidad y Sociedad del Conocimiento presenta una visión general de experiencias exitosas de aprendizaje móvil en la educación superior. El objetivo es compartir buenas prácticas y crear nuevas oportunidades en las universidades. Estas aplicaciones móviles añadirán un nuevo estrato a los procesos de aprendizaje y enseñanza

A collective intelligence approach for building student's trustworthiness profile in online learning

(c) 2014 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other users, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works for resale or redistribution to servers or lists, or reuse of any copyrighted components of this work in other works.Information and communication technologies have been widely adopted in most of educational institutions to support e-Learning through different learning methodologies such as computer supported collaborative learning, which has become one of the most influencing learning paradigms. In this context, e-Learning stakeholders, are increasingly demanding new requirements, among them, information security is considered as a critical factor involved in on-line collaborative processes. Information security determines the accurate development of learning activities, especially when a group of students carries out on-line assessment, which conducts to grades or certificates, in these cases, IS is an essential issue that has to be considered. To date, even most advances security technological solutions have drawbacks that impede the development of overall security e-Learning frameworks. For this reason, this paper suggests enhancing technological security models with functional approaches, namely, we propose a functional security model based on trustworthiness and collective intelligence. Both of these topics are closely related to on-line collaborative learning and on-line assessment models. Therefore, the main goal of this paper is to discover how security can be enhanced with trustworthiness in an on-line collaborative learning scenario through the study of the collective intelligence processes that occur on on-line assessment activities. To this end, a peer-to-peer public student's profile model, based on trustworthiness is proposed, and the main collective intelligence processes involved in the collaborative on-line assessments activities, are presented.Peer ReviewedPostprint (author's final draft

El cambio tecnológico en la historia agraria de la España contemporánea

En este estudio se revisan las investigaciones recientes sobre la innovación y el cambio tecnológico en las agriculturas españolas contemporáneas en los siglos XIX y XX, destacando sus marcos teóricos, sus principales conclusiones y sus límites, En este estudio también se diferencian los trabajos dedicados a las transformaciones de la agricultura orgánica de los que se ocupan de la revolución verde y se proponen nuevas vías de investigación, Al final se ofrece una amplia relación de los trabajos publicados en los últimos años sobre el tema del cambio técnico en la agricultura española contemporánea.This paper reviews the latest research on innovations and technological changes occurred in Spanish contemporary agriculture in the 19th and 20th centuries, underlying its different theoretical approaches, conclusions, and problems. The main works devoted to the transformations experienced by organic agriculture and to the green revolution are considered here. An extensive list of works published in the last years is included at the end

Numerical Methods for the Modelling of Chip Formation

The modeling of metal cutting has proved to be particularly complex due to the diversity of physical phenomena involved, including thermo-mechanical coupling, contact/friction and material failure. During the last few decades, there has been significant progress in the development of numerical methods for modeling machining operations. Furthermore, the most relevant techniques have been implemented in the relevant commercial codes creating tools for the engineers working in the design of processes and cutting devices. This paper presents a review on the numerical modeling methods and techniques used for the simulation of machining processes. The main purpose is to identify the strengths and weaknesses of each method and strategy developed up-to-now. Moreover the review covers the classical Finite Element Method covering mesh-less methods, particle-based methods and different possibilities of Eulerian and Lagrangian approaches

Numerical methods for the modelling of chip formation

The modeling of metal cutting has proved to be particularly complex due to the diversity of physical phenomena involved, including thermo-mechanical coupling, contact/friction and material failure. During the last few decades, there has been significant progress in the development of numerical methods for modeling machining operations. Furthermore, the most relevant techniques have been implemented in the the relevant commercial codes creating tools for the engineers working in the design of processes and cutting devices. This paper presents a review on the numerical modeling methods and techniques used for the simulation of machining processes. The main purpose is to identify the strengths and weaknesses of each method and strategy developed up-to-now. Moreover the review covers the classical Finite Element Method covering mesh-less methods, particle-based methods and different possibilities of Eulerian and Lagrangian approaches.Postprint (author's final draft

Scaling of variational quantum circuit depth for condensed matter systems

We benchmark the accuracy of a variational quantum eigensolver based on a finite-depth quantum circuit encoding ground state of local Hamiltonians. We show that in gapped phases, the accuracy improves exponentially with the depth of the circuit. When trying to encode the ground state of conformally invariant Hamiltonians, we observe two regimes. A finite-depth regime, where the accuracy improves slowly with the number of layers, and a finite-size regime where it improves again exponentially. The cross-over between the two regimes happens at a critical number of layers whose value increases linearly with the size of the system. We discuss the implication of these observations in the context of comparing different variational ansatz and their effectiveness in describing critical ground states