Grandes historias a pasos cortos

Documental de carácter intimista protagonizado por Paola Nieto, Álvaro Novoa y Mauricio Ardila, tres personas que a raíz de su enanismo siempre han visto el mundo desde una perspectiva única. En su día a día, enfrentan complejos estereotipos sociales y estigmas por su baja estatura, pero a través de su profesión, su vida social y acompañados de sus seres queridos, han superado esos retos para vivir a plenitud en un mundo de gigantes.

Climate seasonality limits leaf carbon assimilation and wood productivity in tropical forests.

The seasonal climate drivers of the carbon cy- cle in tropical forests remain poorly known, although these forests account for more carbon assimilation and storage than any other terrestrial ecosystem. Based on a unique combina- tion of seasonal pan-tropical data sets from 89 experimental sites (68 include aboveground wood productivity measure- ments and 35 litter productivity measurements), their asso- ciated canopy photosynthetic capacity (enhanced vegetation index, EVI) and climate, we ask how carbon assimilation and aboveground allocation are related to climate seasonal- ity in tropical forests and how they interact in the seasonal carbon cycle. We found that canopy photosynthetic capacity seasonality responds positively to precipitation when rain- fall is < 2000 mm yr-1 (water-limited forests) and to radia- tion otherwise (light-limited forests). On the other hand, in- dependent of climate limitations, wood productivity and lit- terfall are driven by seasonal variation in precipitation and evapotranspiration, respectively. Consequently, light-limited forests present an asynchronism between canopy photosyn- thetic capacity and wood productivity. First-order control by precipitation likely indicates a decrease in tropical forest pro- ductivity in a drier climate in water-limited forest, and in cur- rent light-limited forest with future rainfall < 2000 mm yr-1.

Blended Learning Essentials Project reports

Blended Learning Essentials is a free suite of online courses for the Vocational Education and Training sector to promote effective practice and pedagogy in blended learning. The courses were run and supported from 2016 onwards by a consortium of partners funded by Ufi Charitable Trust. The lead partners were the University of Leeds, the UCL Institute of Education, the Association for Learning Technology (ALT), and FutureLearn. The Blended Learning Essentials (BLE) courses are for anyone working in further education, skills training, vocational education, workplace learning, lifelong learning or adult education, who wants to learn about and implement blended learning. The project reports cover engagement and marketing work undertaken during this project phase to reach the courses’ key audiences and work undertaken during this project phase to develop and promote the pathways to accreditation available to course participants. These reports are shared by ALT as a project partner on behalf of the BLE Project under a CC-BY-NC-ND licence. �

Synthesis and electronic properties of luminescent silicon nanocrystals and copper indium sulphide quantum dots

In the last decades, nanomaterials, and in particular semiconducting nanoparticles (or quantum dots), have gained increasing attention due to their controllable optical properties and potential applications. Silicon nanoparticles (also called silicon nanocrystals, SiNCs) have been extensively studied in the last years, due to their physical and chemical properties which render them a valid alternative to conventional quantum dots. During my PhD studies I have planned new synthetical routes to obtain SiNCs functionalised with molecules which could ameliorate the properties of the nanoparticle. However, this was certainly challenging, because SiNCs are very susceptible to many reagents and conditions that are often used in organic synthesis. They can be irreversibly quenched in the presence of alkalis, they can be damaged in the presence of oxidants, they can modify their optical properties in the presence of many nitrogen-containing compounds, metal complexes or simple organic molecules. If their surface is not well-passivated, the oxygen can introduce defect states, or they can aggregate and precipitate in several solvents. Therefore, I was able to functionalise SiNCs with different ligands: chromophores, amines, carboxylic acids, poly(ethylene)glycol, even ameliorating functionalisation strategies that already existed. This thesis will collect the experimental procedures used to synthesize silicon nanocrystals, the strategies adopted to functionalise effectively the nanoparticle with different types of organic molecules, and the characterisation of their surface, physical properties and luminescence (mostly photogenerated, but also electrochemigenerated). I also spent a period of 7 months in Leeds (UK), where I managed to learn how to synthesize other cadmium-free quantum dots made of copper, indium and sulphur (CIS QDs). During my last year of PhD, I focused on their functionalisation by ligand exchange techniques, yielding the first example of light-harvesting antenna based on those quantum dots. Part of this thesis is dedicated to them.

L’efficacia della Mirror Therapy nel trattamento del dolore da arto fantasma. Una Revisione Sistematica della Letteratura.

Background. Il dolore da arto fantasma ha un forte impatto su benessere e stile di vita dei soggetti amputati. Obiettivi. Valutare l’efficacia del trattamento con mirror therapy in termini di miglioramento del dolore da arto fantasma nei pazienti amputati rispetto ad altre tipologie di trattamento o al trattamento placebo. Disegno dello studio. Revisione sistematica di efficacia. Criteri di eleggibilità. Sono stati inclusi i Trial Clinici Randomizzati in lingua inglese e italiana, che indagassero l’efficacia del trattamento con mirror therapy confrontandolo con il trattamento placebo o altri trattamenti in termini di intensità del dolore. L’outcome primario doveva essere misurato con scala NRS, VAS o altra scala specifica. Fonti di ricerca. PUBMED, PEDro, Embase, Scopus. La letteratura grigia è stata valutata tramite ricerca in Google Scholar. Risultati. Sono stati analizzati 149 articoli e al termine dell’iter di selezione 9 sono stati inclusi nella presente revisione, di cui 7 sono stati utilizzati per la metanalisi. In 7 studi, la mirror therapy produceva miglioramenti statisticamente significativi a breve termine sull’intensità del dolore. Tuttavia, i risultati della metanalisi evidenziano come sia impossibile giungere a conclusioni di certezza, a seguito dell’alta eterogeneità riscontrata nelle analisi. Alla sottoanalisi condotta con gli studi di maggior qualità metodologica l’eterogeneità diminuiva, ma il risultato di efficacia per la mirror therapy non era statisticamente significativo. Conclusioni. Sebbene la mirror therapy mostri in più studi risultati incoraggianti, la metanalisi suggerisce cautela nell’analisi di tali dati, mostrando un’elevata eterogeneità e risultati non statisticamente significativi. Ulteriori studi sono necessari per approfondire i risultati ottenuti, con campioni più ampi, una metodologia più rigorosa e modalità di erogazione del trattamento maggiormente standardizzate.