Densitat Digital: la Causa del Processos de Transformació Digital

Digital technologies have increased the influence of technology in business, even changing busi- ness models and strategies of organisations. This influence, called Digital Transformation of Business (DT), happens when there is an increase of the number of digital connections, infor- mation and interactions. This phenomena has been defined as Digital Density (DD) and aims to provide an assessment of the digitalization status of an organization. With the concept of DD we propose the DD Framework, that has two parts: qualitative and quantitative. In order to support both parts we simulate the effect that a platform for smartphones called Waze has on the traffic flow of a city. For the qualitative side, we redefine the concept of DD and with Business Model CANVAS we compare the changes introduced by Waze in the business model. The quantitative part of the simulation is performed with MATLAB and its goal is to under- stand how an agent chooses the path to drive from point A to point B. As expected, we prove that with more information agents can estimate better the costs of the different paths. Despite, even if our simulation seems to prove that the more information the agents have the better the system works, we introduce an analogy with the Braess Paradox to find potential problems and provide solutions for them. We conclude with a proposal of future work.Las tecnologías digitales han aumentado la influencia de la tecnología en el mundo del negocio, llegando incluso a cambiar los modelos de negocio y las estrategias de las organizaciones. Esta influencia, llamada Transformación Digital del Negocio (Digital Transformation - DT), sucede cuando aumentan el número de conexiones, información e interacciones digitales. Este fenómeno ha sido definido como Densidad Digital (Digital Density - DD) y tiene como objetivo proporcionar un análisis del estado de digitalización de las organizaciones. Con el concepto DD se propone el Modelo DD (DD Framework), que está formado por dos partes: una cualitativa y otra cuantitativa. Con el fin de dar soporte a estas dos partes se simula el efecto que una plataforma para smartphones llamada Waze tiene en el tráfico de las ciudades. Por lo que respecta a la parte cualitativa, se ha redefinido el concepto DD y con el Modelo CANVAS comparamos los cambios que ha introducido Waze en modelos de negocio previos. La parte cuantitativa de la simulación se ha realizado con MATLAB cuyo máximo objetivo es entender cómo un agente (conductor) elige uno u otro camino para ir de A a B. Como esperábamos, hemos comprobado que los agentes pueden realizar mejores decisiones respecto al camino a elegir a medida que tienen más información. A pesar de estos resultados, se introduce una analogía con la Paradoja de Braess para encontrar problemas potenciales y proporcionar soluciones. Se finaliza con una propuesta de futuro trabajo.Les tecnologies digitals han augmentat la influència de la tecnologia en el món del negoci, inclús canviant els models de negoci i estratègies de les organitzacions. Aquesta influència, que anomenam Transformació Digital del Negoci (Digital Transformation - DT), esdevé quan augmenta el nombre de connexions, informació i interaccions digitals. Aquest fenomen es defineix com Densitat Digital (Digital Density - DD) i té com a objectiu proporcionar un anàlisi de l'estat de digitalització de les organitzacions. Amb el concepte DD proposam el Model DD (DD Framework), que està format per dues parts: una qualitativa i una altra quantitativa. Amb la finalitat de donar suport a aquestes dues parts s'ha simulat l'efecte que una plataforma per smartphones anomenada Waze té sobre el trànsit de les ciutats. Pel que fa a la part qualitativa, s'ha redefinit el concepte DD i amb el Model CANVAS comprovam els canvis que Waze ha introduït als models de negoci previs a la seva aparició. La part quantitativa de la simulació s'ha realitzat amb MATLAB amb el màxim objectiu d'entendre com un agent (conductor) escull entre un camí o un altre per anar des d'A fins a B. Tal i com s'esperava, s'ha comprovat que els agents poden realitzar millors decisions pel que fa a la tria del camí a mesura que tenen més informació. Contràriament, introduïm una analogia amb la Paradoxa de Braess per a trobar problemes potencials i proporcionar solucions. Es finalitza amb una proposta de treball futur

A further cost for the sicker sex? Evidence for male-biased parasite-induced vulnerability to predation

Males are typically the sicker sex. Data from multiple taxa indicate that they are more likely to be infected with parasites, and are less ‘tolerant’, or less able to mitigate the fitness costs of a given infection, than females. One cost of infection for many animals is an increased probability of being captured by a predator. A clear, hitherto untested, prediction is therefore that this parasite-induced vulnerability to predation is more pronounced among males than females. We tested this prediction in the sexually size dimorphic guppy, Poecilia reticulata, in which females are typically larger than males. We either sham or experimentally infected guppies with Gyrodactylus turnbulli, elicited their escape response using an established protocol and measured the distance they covered during 60 ms. To discriminate between the effects of body size and those of other inherent sex differences, we size-matched fish across treatment groups. Infection with G. turnbulli reduced the distance covered during the escape response of small adults by 20.1%, whereas that of large fish was unaffected. This result implies that parasite-induced vulnerability to predation is male-biased in the wild: although there was no difference in escape response between our experimentally size-matched groups of males and females, males are significantly smaller across natural guppy populations. These results are consistent with Bateman’s principle for immunity: natural selection for larger body sizes and longevity in females seems to have resulted in the evolution of increased infection tolerance. We discuss the potential implications of male-biased parasite-induced vulnerability for the evolutionary ecology of this host-parasite interaction in natural communities

Spanish activities in the framework of the CHARMEX project since 2009: a summary

The ChArMEx (Chemistry-Aerosol Mediterranean Experiment) project is a French initiative aiming at developing and coordinating regional research actions for a scientific assessment of the present and future state of the atmospheric environment in the Mediterranean Basin, and of its impacts on the regional climate, air quality, and marine biogeochemistry. The target of ChArMEx is short-lived particulate and gaseous tropospheric trace species. In 2009 the project gained internationalization with the organization of the first international workshop held in Toulouse, France. Spain was the most represented country (after France) with 7 groups and 10 researchers. Up to date, the Spanish groups involved in ChArMEx have conducted research in several fields. Among them it is worth noting: a 3-year (2010 – 2012) in-situ study over a regional background environment in Mallorca plus 3 intensive measurement campaigns in that period; the installation in Mallorca and in the Sierra Nevada of two autonomous total deposition samplers performing weekly dust deposition on a network basis; and intensive in-situ and remote sensing measurements in Barcelona in thesummer 2012 ChArMEx pre-campaign to give support to airborne observations. The paper gives a summary of all the activities led by Spanish researchers in the framework of ChArMEx. Preliminary results of the 3-year in-situ study in Mallorca and of the summer 2012 pre-campaign, as well as a brief description of the summer 2013 main campaign are presented.Peer ReviewedPostprint (published version

Using a case-study approach to improve the Madden-Julian oscillation in the Hadley Centre model

In its default configuration, the Hadley Centre climate model (GA2.0) simulates roughly one-half the observed level of Madden–Julian oscillation activity, with MJO events often lasting fewer than seven days. We use initialised, climate-resolution hindcasts to examine the sensitivity of the GA2.0 MJO to a range of changes in sub-grid parameterisations and model configurations. All 22 changes are tested for two cases during the Years of Tropical Convection. Improved skill comes only from (a) disabling vertical momentum transport by convection and (b) increasing mixing entrainment and detrainment for deep and mid-level convection. These changes are subsequently tested in a further 14 hindcast cases; only (b) consistently improves MJO skill, from 12 to 22 days. In a 20-year integration, (b) produces near-observed levels of MJO activity, but propagation through the Maritime Continent remains weak. With default settings, GA2.0 produces precipitation too readily, even in anomalously dry columns. Implementing (b) decreases the efficiency of convection, permitting instability to build during the suppressed MJO phase and producing a more favourable environment for the active phase. The distribution of daily rain rates is more consistent with satellite data; default entrainment produces 6–12 mm/day too frequently. These results are consistent with recent studies showing that greater sensitivity of convection to moisture improves the representation of the MJO

A computational study of the electronic properties, ionic conduction, and thermal expansion of Sm1−xAxCoO3 and Sm1−xAxCoO3−x/2 (A = Ba2+, Ca2+, Sr2+, and x = 0.25, 0.5) as intermediate temperature SOFC cathodes

The substitutional doping of Ca2+, Sr2+, and Ba2+ on the Sm-site in the cubic perovskite SmCoO3 is reported to improve both electronic and ionic conductivities for applications as solid oxide fuel cell (SOFC) cathodes. Hence, in this study we have used density functional theory (DFT) calculations to investigate dopant configurations at two different dopant concentrations: 25 and 50%. To preserve the electroneutrality of the system, we have studied two different charge compensation mechanisms: the creation of oxygen vacancies, and electronic holes. After examining the electronic structure, charge density difference, and oxygen vacancy formation energies, we concluded that oxygen vacancy charge compensation is the preferred mechanism to maintain the electroneutrality of the system. Furthermore, we found that the improvement of the electronic conduction is not a direct consequence of the appearance of electron holes, but a result of the distortion of the material, more specifically, the distortion of the Co–O bonds. Finally, molecular dynamics were employed to model ionic conduction and thermal expansion coefficients. It was found that all dopants at both concentrations showed high ionic conduction comparable to experimental results

Actividades españolas en el marco del proyecto CHARMEX desde 2009: un resumen

El proyecto ChArMEx (Chemistry-Aerosol Mediterranean Experiment) es una iniciativa francesa cuyo objetivo es desarrollar y coordinar las acciones de investigación regionales para una evaluación científica de la situación actual y el futuro del medio ambiente atmosférico en la cuenca mediterránea. Los grupos españoles que participan en ChArMEx llevan a cabo investigaciones en varios campos. Entre ellos cabe señalar: un estudio in-situ de 3 años (2010-2012) en un entorno regional de fondo en Mallorca; la instalación en Mallorca y Granada de dos nuevos colectores de deposición autónomos que colectan la deposición de polvo semanalmente; mediciones intensivas in situ y de teledetección en Barcelona en el verano 2012 durante la pre-campaña ChArMEx; y mediciones de teledetección intensivos en Barcelona y Granada en el verano de 2013 durante la campaña ChArMEx / ADRIMED. Este manuscrito da un resumen de todas las actividades conducidas por investigadores españoles hasta ahora en el marco de ChArMEx. Se presentan resultados preliminares del estudio in-situ de 3 años en Mallorca y parte de las campañas de verano de 2012 y 2013.Peer ReviewedPostprint (published version

Harnessing the diversity of small-scale actors is key to the future of aquatic food systems

Small-scale fisheries and aquaculture (SSFA) provide livelihoods for over 100 million people and sustenance for ~1 billion people, particularly in the Global South. Aquatic foods are distributed through diverse supply chains, with the potential to be highly adaptable to stresses and shocks, but face a growing range of threats and adaptive challenges. Contemporary governance assumes homogeneity in SSFA despite the diverse nature of this sector. Here we use SSFA actor profiles to capture the key dimensions and dynamism of SSFA diversity, reviewing contemporary threats and exploring opportunities for the SSFA sector. The heuristic framework can inform adaptive governance actions supporting the diversity and vital roles of SSFA in food systems, and in the health and livelihoods of nutritionally vulnerable people—supporting their viability through appropriate policies whilst fostering equitable and sustainable food systems.Additional co-authors: Caroline E Ferguson, Nicole Franz, Christopher D. Golden, Benjamin S. Halpern, Lucie Hazen, Christina Hicks, Derek Johnson, Sangeeta Mangubhai, Rosamond L. Naylor, Melba Reantaso, U. Rashid Sumaila, Shakuntala H. Thilsted, Michelle Tigchelaar, Colette C. C. Wabnitz & Wenbo Zhan

Limb proportions show developmental plasticity in response to embryo movement

Animals have evolved limb proportions adapted to different environments, but it is not yet clear to what extent these proportions are directly influenced by the environment during prenatal development. The developing skeleton experiences mechanical loading resulting from embryo movement. We tested the hypothesis that environmentally-induced changes in prenatal movement influence embryonic limb growth to alter proportions. We show that incubation temperature influences motility and limb bone growth in West African Dwarf crocodiles, producing altered limb proportions which may, influence post-hatching performance. Pharmacological immobilisation of embryonic chickens revealed that altered motility, independent of temperature, may underpin this growth regulation. Use of the chick also allowed us to merge histological, immunochemical and cell proliferation labelling studies to evaluate changes in growth plate organisation, and unbiased array profiling to identify specific cellular and transcriptional targets of embryo movement. This disclosed that movement alters limb proportions and regulates chondrocyte proliferation in only specific growth plates. This selective targeting is related to intrinsic mTOR (mechanistic target of rapamycin) pathway activity in individual growth plates. Our findings provide new insights into how environmental factors can be integrated to influence cellular activity in growing bones and ultimately gross limb morphology, to generate phenotypic variation during prenatal development

The vital roles of blue foods in the global food system

Blue foods play a central role in food and nutrition security for billions of people and are a cornerstone of the livelihoods, economies, and cultures of many coastal and riparian communities. Blue foods are extraordinarily diverse, are often rich in essential micronutrients and fatty acids, and can often be produced in ways that are more environmentally sustainable than terrestrial animal-source foods. Capture fisheries constitute the largest wild-food resource for human extraction that would be challenging to replace. Yet, despite their unique value, blue foods have often been left out of food system analyses, policies, and investments. Here, we focus on three imperatives for realizing the potential of blue foods: (1) Bring blue foods into the heart of food system decision-making; (2) Protect and develop the potential of blue foods to help end malnutrition; and (3) Support the central role of small-scale actors in fisheries and aquaculture. Recognition of the importance of blue foods for food and nutrition security constitutes a critical justification to preserve the integrity and diversity of aquatic species and ecosystems.Additional co-authors: Christopher D. Golden. Benjamin S. Halpern, Christina C. Hicks, Malin Jonell, Avinash Kishore, J. Zachary Koehn, Rosamond L. Naylor, Michael J. Phillips, Elizabeth R. Selig, Rebecca E. Short, Rashid Sumaila, Shakuntala H. Thilsted, Max Troell, Colette C. C. Wabnit

The Current State of Cephalopod Science and Perspectives on the Most Critical Challenges Ahead From Three Early-Career Researchers

International audienceHere, three researchers who have recently embarked on careers in cephalopod biology discuss the current state of the field and offer their hopes for the future. Seven major topics are explored genetics, aquaculture, climate change, welfare, behavior, cognition, and neurobiology. Recent developments in each of these fields are reviewed and the potential of emerging technologies to address specific gaps in knowledge about cephalopods are discussed. Throughout, the authors highlight specific challenges that merit particular focus in the near-term. This review and prospectus is also intended to suggest some concrete near-term goals to cephalopod researchers and inspire those working outside the field to consider the revelatory potential of these remarkable creatures