764 research outputs found
Surveying human habit modeling and mining techniques in smart spaces
A smart space is an environment, mainly equipped with Internet-of-Things (IoT) technologies, able to provide services to humans, helping them to perform daily tasks by monitoring the space and autonomously executing actions, giving suggestions and sending alarms. Approaches suggested in the literature may differ in terms of required facilities, possible applications, amount of human intervention required, ability to support multiple users at the same time adapting to changing needs. In this paper, we propose a Systematic Literature Review (SLR) that classifies most influential approaches in the area of smart spaces according to a set of dimensions identified by answering a set of research questions. These dimensions allow to choose a specific method or approach according to available sensors, amount of labeled data, need for visual analysis, requirements in terms of enactment and decision-making on the environment. Additionally, the paper identifies a set of challenges to be addressed by future research in the field
The Unesco Intangible Heritage as Input for the Development of Rural Areas: A Theoretical Model for the Valorization of the Mediterranean Diet
AbstractThe study aims to identify guidelines for defining a model of cultural planning, oriented to the development of the city of Reggio Calabria as a metropolitan centre. It will focus specifically on the rural areas, to provide an integrated plan for the advancement of cultural identity. This study develops a theoretical operating model for the valorization of the Mediterranean diet. The methodology consists of a preliminary fact-finding investigation. The second step involves the selection of municipalities able to apply best practices in the area in order to promote the Mediterranean Diet
Low frequency follow up of radio halos and relics in the GMRT Radio Halo Cluster Survey
We performed GMRT low frequency observations of the radio halos, relics and
new candidates belonging to the GMRT Radio Halo Cluster Sample first observed
at 610 MHz. High sensitivity imaging was performed using the GMRT at 325 MHz
and 240 MHz. The properties of the diffuse emission in each cluster were
compared to our 610 MHz images and/or literature information available at other
frequencies, in order to derive the integrated spectra over a wide frequency
range.Beyond the classical radio halos, whose spectral index is in the
range (S), we found sources with
. This result supports the idea that the spectra of the
radiating particles in radio halos is not universal, and that inefficient
mechanisms of particle acceleration are responsible for their origin. We also
found a variety of brightness distributions, i.e. centrally peaked as well as
clumpy halos. Even though the thermal and relativistic plasma tend to occupy
the same cluster volume, in some cases a positional shift between the radio and
X-ray peaks of emission is evident. Our observations also revealed the
existence of diffuse cluster sources which cannot be easily classified either
as halos or relics. New candidate relics were found in A1300 and in A1682, and
in some clusters "bridges" of radio emission have been detected, connecting the
relic and radio halo emission. Combining our new data with literature
information, we derived the LogL-LogP correlation for
radio halos, and investigated the possible trend of the spectral index of radio
halos with the temperature of the intracluster medium.Comment: 19 pages, 10 figures, 5 tables, accepted for publication on A&
Brightest Cluster Galaxies in the Extended GMRT radio halo cluster sample. Radio properties and cluster dynamics
Brightest Cluster Galaxies (BCGs) show exceptional properties over the whole
electromagnetic spectrum. Their special location at the centres of galaxy
clusters raises the question of the role of the environment on their radio
properties. To decouple the effect of the galaxy mass and of the environment in
their statistical radio properties, we investigate the possible dependence of
the occurrence of radio loudness and of the fractional radio luminosity
function on the dynamical state of the hosting cluster. We studied the radio
properties of the BCGs in the Extended GMRT Radio Halo Survey (EGRHS). We
obtained a statistical sample of 59 BCGs, which was divided into two classes,
depending on the dynamical state of the host cluster, i.e. merging (M) and
relaxed (R). Among the 59 BCGs, 28 are radio-loud, and 31 are radio--quiet. The
radio-loud sources are located favourably located in relaxed clusters (71\%),
while the reverse is true for the radio-quiet BCGs, mostly located in merging
systems (81\%). The fractional radio luminosity function (RLF) for the BCGs is
considerably higher for BCGs in relaxed clusters, where the total fraction of
radio loudness reaches almost 90\%, to be compared to the 30\% in merging
clusters. For relaxed clusters, we found a positive correlation between the
radio power of the BCGs and the strength of the cool core, consistent with
previous studies on local samples. Our study suggests that the radio loudness
of the BCGs strongly depends on the cluster dynamics, their fraction being
considerably higher in relaxed clusters. We compared our results with similar
investigations, and briefly discussed them in the framework of AGN feedback.Comment: 12 pages, 6 figures, 3 tables, A&A accepte
Consumer preferences for front-of-pack nutrition labels: the case of nutri-score labelling in Spain
In Europe, in the Farm to Fork Strategy (FTFS), published on 20 May 2020, has been indicated for the 2022 the harmonization of all nutritional labelling introduced by European countries voluntarily, following the art 35 of the Regulation 1196/2011. Actually, different countries have introduced front-of-pack nutrition labels (FoPNL) as a tool to help their citizens to make healthy decisions when shopping. For example, Nutri-Score has already been endorsed by a number of European countries, Spain being the second country adopting it (2018) and rejected by some others, like Italy that claims it penalizes Made in Italy food products, especially the EU quality certified. This study analyses Spanish consumer’s choices and understanding of Nutri-Score, NutrInform Battery and Multiple Traffic Light. 400 Spanish consumers participated in an online survey during the fall 2020 and a Discrete Choice Experiment was implemented (DCE). The primarily analysis indicate that Spanish consumers value positively the FoPNL, but Nutri-Score was not preferred as the best option since the most valued was the NutrInform Battery
Effectiveness of iNTS vaccination in Sub-Saharan Africa
Invasive non-Typhoidal Salmonella (iNTS) is one of the leading causes of
blood stream infections in Sub-Saharan Africa, especially among children. iNTS
can be difficult to diagnose, particularly in areas where malaria is endemic
and difficult to treat, partly because of the emergence of antibiotic
resistance. We developed a mathematical model to evaluate the impact of a
vaccine for iNTS in 49 countries of sub-Saharan Africa. Without vaccination we
estimate 9.2 million new iNTS cases among children below 5 years old in these
49 countries from 2022 to 2038, 6.2 million of which between 2028 and 2038. The
introduction of a 85% (95%) efficacy vaccine in 2028 would prevent 2.6 (2.9)
million of these new infections. We provide the country-specific impact of a
iNTS vaccine considering the different age structures and vaccine coverage
levels.Comment: 87 pages, 58 figure
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