Natural genetic variation of root system architecture from Arabidopsis to Brachypodium: towards adaptive value.

Root system architecture is a trait that displays considerable plasticity because of its sensitivity to environmental stimuli. Nevertheless, to a significant degree it is genetically constrained as suggested by surveys of its natural genetic variation. A few regulators of root system architecture have been isolated as quantitative trait loci through the natural variation approach in the dicotyledon model, Arabidopsis. This provides proof of principle that allelic variation for root system architecture traits exists, is genetically tractable, and might be exploited for crop breeding. Beyond Arabidopsis, Brachypodium could serve as both a credible and experimentally accessible model for root system architecture variation in monocotyledons, as suggested by first glimpses of the different root morphologies of Brachypodium accessions. Whether a direct knowledge transfer gained from molecular model system studies will work in practice remains unclear however, because of a lack of comprehensive understanding of root system physiology in the native context. For instance, apart from a few notable exceptions, the adaptive value of genetic variation in root system modulators is unknown. Future studies should thus aim at comprehensive characterization of the role of genetic players in root system architecture variation by taking into account the native environmental conditions, in particular soil characteristics.

Les adolescents, Internet et les nouvelles technologies: un nouveau pays des merveilles ? [Adolescents, Internet and new technologies: a new wonderland?]

Cet article passe en revue les côtés positifs et les risques liés à l'utilisation des nouvelles technologies. Parmi les aspects positifs, figurent l'accès rapide à des informations à caractère éducatif, la possibilité d'échanges à caractère social ou intellectuel, et l'ouverture à des renseignements dans le domaine de la santé, des drogues ou de la sexualité. Les menaces sont liées à l'inexpérience et à la difficulté à juger de la validité des informations, ou du risque que les jeunes prennent en diffusant des informations sur le web. La dépendance à internet et le risque de violence sont probablement surestimés. Un monitorage ouvert et interactif de la part des parents constitue une bonne prévention. L'investigation du rapport que chaque jeune patient entretient avec ces outils fait partie intégrante de tout bilan de santé. [Abstract] This reviews the use of new technologies with its benefits and pitfalls. Among the positive aspects are instant access to educational information, the possibility to connect with mates and to develop social exchanges, as well as an access to preventive contents in the field of health, substances or sexuality. The risks are linked with inexperience and the adolescent's inability to assess the validity of information collected on Internet, as well as a lack of insights of the consequences of launching information or images on the web. The menace of addiction or of violence induced by intemet is probably overestimated by many adults but should be taken into account. Parents should monitor their adolescents' activity in an open and interactive way. Moreover, any adolescent medical check-up should touch on the use of new technologies.

Desenvolupament d'una xarxa telemàtica, per proveïr d'accés a Internet al municipi de Premià de Mar

Solució de disseny per al sistema de comunicació en una comunitat Wifi que permeti, en unes àrees determinades, navegar sense cap problema amb qualsevol dispositiu amb connexió sense fils.

Broadcast Yourself! Internet and playful media practices

In this paper we want to present a work- in-progress research about video self production on the Internet that is part of a broader research project which explores the ways current media practices convey a 'playful' relationship with digital technologies in popular culture.

La Utilització d'internet en les campanyes electorals als Estats Units i a Espanya : comparació de la campanya de Barack Obama (2008) i dels principals candidats de l'Estat (2011)

La campanya electoral de Barack Obama per guanyar les eleccions nord-americanes l'any 2008 s'ha convertit en el referent de les e-campanyes. En aquesta investigació es fa una anàlisi de l'estratègia que va plantejar el candidat demòcrata a internet enfront les que van plantejar els principls candidats a les Eleccions Generals espanyoles el 2011: Mariano Rajoy (PP), Alfredo Pérez Rubalcaba (PSOE) i Josep Antoni Duran i Lleida (CiU). La investigació es planteja des de l'àmbit de la comunicació política a través d'una perspectiva comparativa i pren, fonamentalment, caràcter qualitatiu.

Assessing High-Speed Internet Access in the State of Iowa: Fourth Assessment, December 2004

The primary objective of the Fourth Assessment is to evaluate the level of progress in the deployment of high-speed Internet technologies in the State of Iowa.

The role of transcription factories-mediated interchromosomal contacts in the organization of nuclear architecture.

Using numerical simulations, we investigate the underlying physical effects responsible for the overall organization of chromosomal territories in interphase nuclei. In particular, we address the following three questions: (i) why are chromosomal territories with relatively high transcriptional activity on average, closer to the centre of cell's nucleus than those with the lower activity? (ii) Why are actively transcribed genes usually located at the periphery of their chromosomal territories? (iii) Why are pair-wise contacts between active and inactive genes less frequent than those involving only active or only inactive genes? We show that transcription factories-mediated contacts between active genes belonging to different chromosomal territories are instrumental for all these features of nuclear organization to emerge spontaneously due to entropic effects arising when chromatin fibres are highly crowded.

Implementation and evaluation of an internet health site for adolescents in Switzerland.

Ciao is a website specifically designed for young people and focuses mainly on health issues. This report presents the process of setting up the site and a first evaluation undertaken by using two self-administered questionnaires administered via the website itself. It suggests that it is possible to provide young people with authoritative health information and to facilitate their access to counseling and health care facilities by having young people use such a website.

Internet como fuente generadora de contenidos especializados

La plena vigencia de la Web 2.0, así como los tímidos inicios de la Web semántica, propician una excelente oportunidad para el Periodismo especializado. En una sociedad intercomunicada en la que todo aquel que disponga de las herramientas básicas puede convertirse en emisor de contenidos digitales, el papel mediador del periodista debe ser reforzado con el de selector y guía del mapa informativo que ofrece Internet. Con este ánimo se publica el presente texto que recoge las aportaciones de docentes e investigadores del ámbito científico del Periodismo especializado. A sus reflexiones, análisis y críticas han añadido gran cantidad de cuadros y tablas cuya finalidad didáctica no es otra que la de poner un poco de orden en el caos informativo de la red.

Towards a user-friendly webservice architecture for statistical machine translation in the PANACEA project

This paper presents a webservice architecture for Statistical Machine Translation aimed at non-technical users. A workfloweditor allows a user to combine different webservices using a graphical user interface. In the current state of this project,the webservices have been implemented for a range of sentential and sub-sententialaligners. The advantage of a common interface and a common data format allows the user to build workflows exchanging different aligners.

Recursos sobre protección de los derechos de la mujer en Internet

Con el objetivo de contribuir a salvaguardar los derechos fundamentales de las mujeres, hemos realizado este trabajo en el que intentamos recoger de la manera más exhaustiva que permita un medio tan voluble y cambiantecomo internet, los recursos existentes en la red sobre la Protección de los Derechos de la Mujer, y de esta manera facilitar el acceso a los mismos. La intención que ha guiado desde un principio a la elaboración de estaobra ha sido proporcionar un recurso de información práctica a aquellos profesionalesque desarrollan tareas relacionadas con la protección de los derechos de la mujer, así como a cualquier otra persona interesada o que necesite estar informada sobre esta temática. Así pues, el objetivo que nos hemos marcado no ha sido otro que el dedesarrollar una guía que permita a sus usuarios/as encontrar en internet aquellas direcciones sobre Derechos de la Mujer que facilitan un contenido sustancial e interesante.