Search results for "LoRa"
showing 10 items of 2828 documents
Astrobiology of life on Earth
2021
Astrobiology is mistakenly regarded by some as a field confined to studies of life beyond Earth. Here, we consider life on Earth through an astrobiological lens. Whereas classical studies of microbiology historically focused on various anthropocentric sub-fields (such as fermented foods or commensals and pathogens of crop plants, livestock and humans), addressing key biological questions via astrobiological approaches can further our understanding of all life on Earth. We highlight potential implications of this approach through the articles in this Environmental Microbiology special issue ‘Ecophysiology of Extremophiles’. They report on the microbiology of places/processes including low-te…
IL POTENZIALE FITOALIMURGICO DI INTERESSE ORTICOLO DELLA FLORA SICULA: Osservazioni sull’autoecologia di alcune specie eduli appartenenti alle famigl…
2006
L’indirizzo dato dall’U.E. verso settori produttivi inesplorati e di qualità, mette in risalto la rilevante potenzialità che la fitoalimurgia potrebbe avere nel settore agricolo. Tale requisito è legato al ruolo che le erbe eduli potrebbero esercitare nella filiera agro-alimentare, tenuto conto della richiesta di specie erbacee native nella dietologia, nell’omeopatia, nell’erboristeria, e nella tipizzazione della ristorazione agrituristica. Poiché l’aleatorietà dell’offerta legata alla raccolta in natura è ostativa alla loro valorizzazione, si è ritenuto opportuno studiare la tassonomia e l’autoecologia di alcune specie di maggiore interesse orticolo, con la finalità di dare un contributo a…
La dinamica evolutiva del comparto floristico del territorio di Palma di Montechiaro (AG) dalla prima metà dell’ottocento ad oggi
2006
Lo scopo di questo lavoro è quello di presentare le dinamiche evolutive del comparto floristico del territorio di Palma di Montechiaro. Sono state analizzate tre diverse epoche, dalla prima metà dell’800 a oggi. Lo studio è partito dall’analisi dei dati presenti in un vecchio manoscritto risalente alla prima metà dell’ottocento. Le notizie ottenute dal corposo elenco di specie vegetali, riportato in questo manoscritto, sono state utilizzate per effettuare una analisi comparativa con i risultati delle ricerche condotte sullo stesso territorio nel 1966 dal Prof. M. Sortino e con i i rilievi effettuati nel biennio 2004-2005. L’attenzione è stata posta sulle variazioni della qualità e consisten…
Capture Aware Sequential Waterfilling for LoraWAN Adaptive Data Rate
2020
LoRaWAN (Long Range Wide Area Network) is emerging as an attractive network infrastructure for ultra low power Internet of Things devices. Even if the technology itself is quite mature and specified, the currently deployed wireless resource allocation strategies are still coarse and based on rough heuristics. This paper proposes an innovative "sequential waterfilling" strategy for assigning Spreading Factors (SF) to End-Devices (ED). Our design relies on three complementary approaches: i) equalize the Time-on-Air of the packets transmitted by the system's EDs in each spreading factor's group; ii) balance the spreading factors across multiple access gateways, and iii) keep into account the c…
An exploratory study of COVID-19 misinformation on Twitter.
2020
During the COVID-19 pandemic, social media has become a home ground for misinformation. To tackle this infodemic, scientific oversight, as well as a better understanding by practitioners in crisis management, is needed. We have conducted an exploratory study into the propagation, authors and content of misinformation on Twitter around the topic of COVID-19 in order to gain early insights. We have collected all tweets mentioned in the verdicts of fact-checked claims related to COVID-19 by over 92 professional fact-checking organisations between January and mid-July 2020 and share this corpus with the community. This resulted in 1 500 tweets relating to 1 274 false and 276 partially false cla…
Bayesian Checking of the Second Levels of Hierarchical Models
2007
Hierarchical models are increasingly used in many applications. Along with this increased use comes a desire to investigate whether the model is compatible with the observed data. Bayesian methods are well suited to eliminate the many (nuisance) parameters in these complicated models; in this paper we investigate Bayesian methods for model checking. Since we contemplate model checking as a preliminary, exploratory analysis, we concentrate on objective Bayesian methods in which careful specification of an informative prior distribution is avoided. Numerous examples are given and different proposals are investigated and critically compared.
Emotional politics on Facebook. An exploratory study of Podemos’ discourse during the European election campaign 2014
2015
The results of the European elections 2014 in Spain were characterized by the outstanding rise of a new party, Podemos, which obtained five seats in the European Parliament, despite being founded few months before the elections. The present study analyzes both the content and the presence of emotions in Podemos’ discourse on Facebook during the European electoral campaign. In particular, the affective content of both the party’s discourse and the comments of its followers will be analyzed through a pragmatic linguistic approach applied to a corpus of 163 posts and 215 followers’ comments. Results show an insistence on positive emotions in the party’s discourse and a prevalence of negative e…
Age-Related Changes in the Gut Microbiota Modify Brain Lipid Composition
2020
PMCID: PMC6970973; International audience; Understanding the molecular mechanisms underlying the changes observed during aging is a prerequisite to design strategies to prevent age-related diseases. Aging is associated with metabolic changes, including alteration in the brain lipid metabolism. These alterations may contribute to the development of pathophysiological conditions. Modifications in the gut microbiota composition are also observed during aging. As communication axes exist between the gut microbiota and the brain and knowing that microbiota influences the host metabolism, we speculated on whether age-associated modifications in the gut microbiota could be involved in the lipid ch…
A Two-End Traveling Wave Fault Location System for MV Cables
2019
In this paper, a new low-cost device is proposed for fault location in power distribution system. The device is part of a system that should include several units installed in couples at the two ends of medium voltage (MV) cable lines. Their low cost justifies a widespread installation of these devices, moreover other functionalities could be considered so as to enrich the potential of the system for MV cables monitoring and asset management. The system exploits a two-end traveling wave technique, low complexity, and low-cost solutions both for the analog front end as well as for the communication infrastructure. A LoRa network is indeed considered as wireless modulation technique perfectly…
La Crisis de salinidad messiniense: el papel de los microfósiles durante 60 años de estudio
2021
Para comprender fenómenos geológicos extremos, como la llamada Crisis de Salinidad del Messiniense (CSM), es necesario estudiarlos de forma multidisciplinar y a diferentes escalas. Para ello, se realizan desde estudios geofísicos del subsuelo, que abarcan grandes extensiones del fondo del mar, hasta estudios micropaleontológicos, utilizando microscopio electrónico de barrido. Los restos de organismos que vivieron ese evento geológico aportan una información muy valiosa para comprender la paleogeografía y el paleoambiente durante el Messiniense. Con ese objetivo, los paleontólogos y palinólogos estudian bajo el microscopio fósiles de fauna marina y continental, así como restos de flora en fo…