Search results for "dati"
showing 10 items of 8549 documents
Cross-Domain Recommendations with Overlapping Items
2016
In recent years, there has been an increasing interest in cross-domain recommender systems. However, most existing works focus on the situation when only users or users and items overlap in different domains. In this paper, we investigate whether the source domain can boost the recommendation performance in the target domain when only items overlap. Due to the lack of publicly available datasets, we collect a dataset from two domains related to music, involving both the users’ rating scores and the description of the items. We then conduct experiments using collaborative filtering and content-based filtering approaches for validation purpose. According to our experimental results, the sourc…
A two-step, user-centered approach to personalized tourist recommendations
2017
Geo-localized, mobile applications can simplify a tourist visit, making the relevant Point of Interests more easily and promptly discernible to users. At the same time, such solutions must avoid creating unfitting or rigid user profiles that impoverish the users' options instead of refining them. Currently, user profiles in recommender systems rely on dimensions whose relevance to the user is more often presumed than empirically defined. To avoid this drawback, we build our recommendation system in a two-step process, where profile parameters are evaluated preliminarily and separately from the recommendations themselves. We describe this two-step evaluation process including an initial surv…
Jahn–Teller effects in Au25(SR)18
2016
The relationship between oxidation state, structure, and magnetism in many molecules is well described by first-order Jahn–Teller distortions. This relationship is not yet well defined for ligated nanoclusters and nanoparticles, especially the nano-technologically relevant gold-thiolate protected metal clusters. Here we interrogate the relationships between structure, magnetism, and oxidation state for the three stable oxidation states, −1, 0 and +1 of the thiolate protected nanocluster Au25(SR)18. We present the single crystal X-ray structures of the previously undetermined charge state Au25(SR)18+1, as well as a higher quality single crystal structure of the neutral compound Au25(SR)180. …
Global, National, or Market? Emerging REDD+ Governance Practices in Mozambique and Tanzania
2016
This article examines emerging governance practices in the REDD (Reducing Emissions from Deforestation and Forest Degradation) initiative. We examine three different general governance practices (neoliberal, post-national, and government-led practices) that have been applied in the interaction between international organizations and two REDD target countries: Mozambique and Tanzania. In these countries, we find that emerging REDD+ governance practices are a mixture of international organizations’ procedural practices and the target country’s established governance practices, whereas neoliberal practices are weakly expressed. These findings call into question the simplified assumption of re…
Validity of three smartwatches in estimating energy expenditure during outdoor walking and running.
2022
Commercially wrist-worn devices often present inaccurate estimations of energy expenditure (EE), with large between-device differences. We aimed to assess the validity of the Apple Watch Series 6 (AW), Garmin FENIX 6 (GF) and Huawei Watch GT 2e (HW) in estimating EE during outdoor walking and running. Twenty young normal-weight Chinese adults concurrently wore three index devices randomly positioned at both wrists during walking at 6 km/h and running at 10 km/h for 2 km on a 400- meter track. As a criterion, EE was assessed by indirect calorimetry (COSMED K5). For walking, EE from AW and GF was significantly higher than that obtained by the K5 (p < 0.001 and 0.002, respectively), but…
MOCSE Centered on Students: Validation of Learning Demands and Teacher Support Scales
2020
Based on The Educational Situation Quality Model (MOCSE, acronym in Spanish) framework, the primary objective of this study is to test the factorial validity and reliability of two MOCSE measure instruments referred to the preactional-decisional phase, specifically to learning demands and teacher supports perceived by students to overcome such demands in the classroom context. The participants were 357 Spanish undergraduate students. The data obtained by exploratory and confirmatory factor analyses revealed that the “Learning Demands Scale” (MOCSE-LDS) has a two-factor structure: perceived desirability and feasibility of demands. The data also revealed that the “Teacher Support Questionnair…
Psychometric analysis of the Test of Dependence of Videogames (TDV) in Peruvian population
2017
Resumen El objetivo del presente trabajo es validar en población peruana, el Test de Dependencia de Videojuegos (TDV) (Chóliz & Marco, 2011). Los resultados obtenidos demuestran que se trata de una herramienta confiable y válida. Se encontró una sola estructura factorial, en lugar de cuatro dimensiones, como plantearon los autores del TDV. Este factor podría denominarse genéricamente: adicción a videojuegos, y podría servir como evidencia de la existencia de este trastorno, que coincidiría con el denominado ‘Trastorno de Juego por Internet’, que aparece en la Sección III del DSM-5. Los resultados hallados se discuten en relación a lo planteado por Chóliz y Marco (2011), en lo que se refiere…
Deguna blakusdobumu protokols datortomogrāfijas izmeklējumā polipu gadījumā
2021
Bakalaura darba tēma – “Deguna blakusdobumu protokols datortomogrāfijas izmeklējumā polipu gadījumā”. Tēmas aktualitāte ir tā, ka deguna blakusdobumu polipu diagnostika ir viena no visbiežāk pieprasītajiem radioloģiskajiem izmeklējumiem ar augsta rādītāja izplatību pasaulē. Datortomogrāfijas izmeklēšanas metode, tiek uzskatīta par “zelta standartu”, jo atšķirība no vienkāršās rentgendiagnostikas, lieliski parāda etmoīdās šūnas, deguna dobuma augšējās divas trešdaļas un frontālo padziļinājumu. Darba mērķis ir noskaidrot datortomogrāfijas izmeklējuma protokolu deguna blakusdobumu polipu gadījumā. Pētniecības uzdevumi: analizēt literatūru par deguna blakusdobumu normālo anatomiju un radioloģis…
Telemātikas datu izmantošana apdrošināšanas informācijas sistēmās
2018
Bakalaura darbā tiek pētīts, kas ir telemātikas ierīces, kā tās darbojas un kāds ir to pielietojums. Darbā tiek apskatīts, kādus datus ir iespējams iegūt no telemātikas ierīcēm un kā šos datus pielieto apdrošināšanas informācijas sistēmās. Darba praktiskajā daļā tiek veikta apdrošināšanas informācijas sistēmas integrācija ar trešās puses servisu, no kura tiek iegūti telemātikas ierīču dati par apdrošinātajām automašīnām. Iegūtie dati tiek izmantoti lai izmainītu un automatizētu dažādus apdrošināšanas informācijas sistēmas procesus.
Prenatal thyroid hormones accelerate postnatal growth and telomere shortening in wild great tits
2021
AbstractEarly-life environment is known to affect later-life health and disease, which could be mediated by the early-life programming of telomere length, a key hallmark of ageing. According to thefetal programming of telomere biology hypothesis, variation in prenatal exposure to hormones is likely to influence telomere length. Yet the contribution of key metabolic hormones,i.e. thyroid hormones (THs), has been largely ignored. We recently showed that in contrast to predictions, exposure to elevated prenatal THs increased postnatal telomere length in wild collared flycatchers, but the generality of such effect, its underlying proximate mechanisms and consequences on survival have not been i…