Search results for "LoRa"
showing 10 items of 2828 documents
A Coexistence Study of Low-Power Wide-Area Networks based on LoRaWAN and Sigfox
2023
According to IoT Analytics, NB-IoT, LoRaWAN, and Sigfox are today the most popular technologies for low-power wide-area networks (86% of the market), both in terms of end-user adoption as well as ecosystem support. While NB-IoT utilizes licensed bands, LoRaWAN and Sigfox both employ the sub-GHz ISM bands, potentially interfering with each other.In this paper, we present a thorough coexistence study between LoRaWAN and Sigfox, in realistic urban scenarios, with different duty cycles and traffic conditions. The choice of such scenarios and simulation parameters are supported by an in-depth lit-erature review, and simulations are based on the SEAMCAT simulator. The results offer new insights o…
Internal Hernia Masquerading As Necrotizing Enterocolitis
2017
In extremely preterm infants, acute abdominal emergencies are fortunately less common with improving care. Spontaneous intestinal perforation and necrotizing enterocolitis are conditions where emergency surgery is most often needed. Conservative medical management and placement of temporary drain are often used in the initial management. Internal hernia (IH) is an uncommon cause of bowel obstruction in neonates, is difficult to diagnose and unfortunately are found only at autopsy. The presentation in preterm infants, distinction between these conditions, and the need for early diagnosis of IH are discussed.
Principales problemas de internacionalización de las cooperativas agroalimentarias españolas
2013
Food and agricultural cooperatives, as well as other food companies must consider internationalization as essential for them for their survival; and although there are governmental and private agencies that can support them in this challenge, it is necessary to deeply study the problems that cooperatives face in international markets. Using a methodology that combines theoretical review with qualitative research, the main problems from a sample of internationalized Spanish cooperatives are identified and classified by differentiating the internal from the external ones so as in the near future the necessary measures to minimize or avoid them could be taken by managers and support agencies. …
AI for Resource Allocation and Resource Allocation for AI: a two-fold paradigm at the network edge
2022
5G-and-beyond and Internet of Things (IoT) technologies are pushing a shift from the classic cloud-centric view of the network to a new edge-centric vision. In such a perspective, the computation, communication and storage resources are moved closer to the user, to the benefit of network responsiveness/latency, and of an improved context-awareness, that is, the ability to tailor the network services to the live user's experience. However, these improvements do not come for free: edge networks are highly constrained, and do not match the resource abundance of their cloud counterparts. In such a perspective, the proper management of the few available resources is of crucial importance to impr…
INTESTINAL BACTERIA AND BOWEL DISEASE: ROLE OF PROBIOTICS.
2010
The gut of a helathy adult harbours a myriad of different microbial species (aproximately 10.14 colony forming units). In healthy adults the main control of intestinal bacterial colonization occurs through the gastric acidity. Moreover, other factors can influence the intestinal micorenvironment, as pH, temperature, competition among different bacterial strains, peristalsis, drugs, radiotherapy, and much more. It was found that, when you have an impaired micorbial homeostasis, the intestinal microsystem becomes unstable, so that leads to an alteration of the permeability of tissues, togheter with the activation of the intestinal immune system (MALT). These microenvironmental changes thus pr…
Entrevista semiestructurada para la exploración de la violencia sexual sobre las mujeres en la relación de la pareja (EVS)
2016
La violencia sexual en el ámbito de la relación de pareja es un problema grave experimentado por un alto número de mujeres. Sin embargo, es difícil su detección por la ausencia de reconocimiento social. Este tipo de violencia con frecuencia se da ligado a otras formas de maltrato, no obstante observamos que diferentes protocolos de entrevista publicados para explorarla, no la evalúan o lo hacen de forma superficial. Esto se suma al hecho de que algunas de las mujeres que lo sufren no son conscientes del maltrato, ni de la gravedad e impacto real que tiene sobre ellas. Por todo ello, nuestro objetivo es proponer una herramienta de recogida de información sobre la violencia sexual en la parej…
Possibile origine e consistenza di un popolamento di Quercus trojana Webb subsp. trojana (Fagaceae) nel Bosco della Ficuzza (Palermo, Sicilia
2014
Possible origin and demographic asset of a population of Quercus trojana Webb subsp. trojana (Fagaceae) in the wood of Ficuzza (Palermo, Sicily). The first record of Macedonian oak in Sicily is reported. The finding consists of 73 adult and 4 young individuals. A morphometric analysis of all of them, along with an assessment of their phytosanitary status was carried out. They all grow between 700 and 850 m a.s.l. on a 2,30 ha area, characterized by a land mosaic of shrubland and forest patches. Notwithstanding two years of researches, no ultimate proof has been found on their alien status. On this purpose, several alternative hypothesis are formulated and their strengths and weaknesses are …
Lucian, a new Odysseus? : role and issue of a Homeric character in the work of Lucian of Samosata
2015
The aim of our thesis, which comes within the scope of considering the process of rewriting classic texts in the time period of the second sophistic, is to study the unique importance of Odysseus in the writings of Lucian of Samosata. At first, Odysseus is distinguished from Achilles, a character more monolithic who, even in Homer’s works is constructed in contrast to Odysseus. Moreover, from an isolated quote to intricate references, scattered to create echoes between works seemingly very different, the context in which Odysseus appears is more elaborate and subtler than that of Achilles. Hence, studying and comparing references to both heroes is sufficient to imply Odysseus’ primacy, asso…
Predicting lorawan behavior. How machine learning can help
2020
Large scale deployments of Internet of Things (IoT) networks are becoming reality. From a technology perspective, a lot of information related to device parameters, channel states, network and application data are stored in databases and can be used for an extensive analysis to improve the functionality of IoT systems in terms of network performance and user services. LoRaWAN (Long Range Wide Area Network) is one of the emerging IoT technologies, with a simple protocol based on LoRa modulation. In this work, we discuss how machine learning approaches can be used to improve network performance (and if and how they can help). To this aim, we describe a methodology to process LoRaWAN packets a…
Exploratory approach for network behavior clustering in LoRaWAN
2021
AbstractThe interest in the Internet of Things (IoT) is increasing both as for research and market perspectives. Worldwide, we are witnessing the deployment of several IoT networks for different applications, spanning from home automation to smart cities. The majority of these IoT deployments were quickly set up with the aim of providing connectivity without deeply engineering the infrastructure to optimize the network efficiency and scalability. The interest is now moving towards the analysis of the behavior of such systems in order to characterize and improve their functionality. In these IoT systems, many data related to device and human interactions are stored in databases, as well as I…