1,721,194 research outputs found
Edge and Fog Computing for the Internet of Things
Full text linkOver the last years few years, the number of interconnected devices within the context of Internet of Things (IoT) has rapidly grown; some statistics state that the total number of IoT-connected devices in 2023 has reached the groundbreaking number of 17 billion [...
Madmen's Voices: Discovering Former Psychiatric Hospitals via Mobile Application
No full textThe aim of this paper is to present the realization of a mobile application as a support to the visit to the former psychiatric hospitals in the cities of Siena and Arezzo, in Tuscany, Italy. Due to the unique nature of the place to be recounted, the design phase of the application has paid special attention to the definition of the multimedia material to be provided to the users: Through the use of oral sources, i.e. interviews with the former hospital employees collected over the last 15 years, the app tries to implement the paradigm of Augmented Cultural Heritage, enriching the visit to a Tangible Cultural Site-The hospital-with additional Intangible Cultural Assets, in this case the narrations made by the people who experienced in first person the life inside a psychiatric hospital
Description and biogeographical implications of a new species of the genus Podisma Berthold 1827 from Mont Ventoux in South France (Orthoptera: Acrididae)
No full textThe status of the genus Podisma Berthold 1827 is discussed and all its taxa are listed. Endemic taxa within montane orthopteroid insects in southern Europe are considered and new genera recently revised are recorded. In this context Podisma amedegnatoae n. sp. from Mount Ventoux in the South Alps (France) is defined and described. The main distinctive characters of the new species are the relative length of prozona and metazona, the presence of the dotted dorsal pattern (FDDP) in almost 100% of the females, the broadly incised male furcula, the subquadrate dorsal valvae of the penis and the peculiar v-shaped middle incision diving them. The presence of a distinct species on Mount Ventoux allows to suppose the presence of a refuge area in this region during the ice ages. The analysis of the distribution of the FDDP character, distributed from southern France to southeastern Italy, shows a clear interruption in the genetic flow between the western and eastern slopes (French and Italian slopes) in the western Alps. This interruption fits well with the presence of a hybrid zone, recorded in literature for the genus Podisma on the basis of the distribution in this area of two male sex-chromosome forms. On the other hand data concerning the distribution of FDDP suggest a genetic flow coming from Nortwest to South-east. After that the description of P. amedegnatoae is not only a new contribution to the knowledge of the biodiversity in the southern Europeanmountains but adds new data to the study of the colonisation of Europe after the ice ages, by species which have survived in refuge areas. © 2007 Taylor & Francis Group, LLC
Thermoelectric Generators (TEG) for the Powering of Energy-Hungry LoRaWAN-Based Sensor Nodes in Industrial Applications
No full textThe purpose of this study is to demonstrate the practical application of thermoelectric generators (TEGs) in low-power, energy-hungry wireless sensor systems, with the aim of providing complete energy self-sufficiency to these devices. To this end, an energy-hungry particulate matter (PM) sensor was integrated into a Long-Range Wide Area Network (LoRaWAN)based sensor node, and tested to evaluate the efficacy of the energy harvesting solution. Energy management was facilitated through the use of a low voltage power management integrated circuit (IC), which regulated both the power extraction from the TEGs and the charging process of a Li-Ion battery that powered the whole system. The architecture of the low-power wireless sensing system, integrating an energy-hungry PM sensor is presented, along with a theoretical analysis of its power consumption and the energy requirements for the implementation of effective energy harvesting using TEGs. The final objective of the work is the optimization of the sensor node life time, balancing the frequency of the achievable sensors samplings and data transmissions with the temperature gradient between the TEG faces. The low voltage power manager IC plays a crucial role in ensuring efficient power extraction and regulation, thereby contributing to optimal performance of the system
Museum and Near Field Communication – turning a mobile phone into an interactive tourist guide
No full textCombining LoRaWAN and NB-IoT for Edge-to-Cloud Low Power Connectivity Leveraging on Fog Computing
Full text linkLow Power Wide Area Networks (LPWANs) play crucial roles in the implementation of low-power and low-cost wide area distributed systems. Currently, two enabling technologies are the main competitors within the connectivity field for the Internet of Things (IoT), primarily because of their scalability, wide range and low power features: Long Range Wide Area Network (LoRaWAN) and Narrowband IoT (NB-IoT). In this paper, a brand new network architecture is presented, which combines both aforementioned technologies. Such a network accounts for sensor nodes, multi-protocol gateways, an a cloud infrastructure. Sensor nodes may be alternatively provided with LoRaWAN or NB-IoT. Multi-protocol gateways can receive and demodulate LoRaWAN packets and upload them to the cloud via the Message Queue Telemetry Transport (MQTT) protocol over NB-IoT. The cloud is transparent with respect to the transmission technology, meaning that data are acquired and stored regardless of the exploited technique (i.e., LoRaWAN or NB-IoT). Indeed, sensor nodes using NB-IoT can send data to the cloud and can directly communicate with other NB-IoT nodes setting up a fog computing paradigm on peer-to-peer subnetworks. This approach may be crucial for the development of complex IoT infrastructures while providing high flexibility
The effects of fungicides on non-target mites can be mediated by plant pathogens
No full textField tests are useful for the evaluation of the pesticides' impact in realistic use situations. However, the distinction between the direct and indirect effects of a pesticide is not always possible in field, with consequences on the conclusions about pesticides toxicity. Generalist predatory mites belonging to the Phytoseiidae family are widely considered as non-target organisms in pesticide side-effect evaluations. Plant pathogens of several cultivated plants can be of importance as food resources for various phytoseiids. Pesticides with fungicidal activity may have a direct impact on phytoseiids, but they can also have an indirect effect reducing food availability for predatory mites. Here, we present the results of field experiments performed on grapevine, where we investigate whether the availability of the plant pathogen grape downy mildew has an effect on fungicides impact on the predatory mites Typhlodromus pyri Scheuten and Amblyseius andersoni (Chant). In these experiments we used fungicides characterized by differential selectivity to predatory mites in laboratory: copper compounds, folpet, and mancozeb. Results indicated that the abundance of predatory mites was associated with the plant pathogen foliar symptoms presence. The presence of predatory mites was different among treatments in response of the toxicological traits of a pesticide (direct effects), but also as consequences of differential plant pathogen availability induced by fungicide applications (indirect effects). During the investigation, the variable plant pathogen spread on untreated control determined contrasting results on pesticides effect. We segregated the direct effects from the indirect food resource-mediated effects including a non-toxic reference in the experimental protocols. © 2010 Elsevier Ltd. All rights reserved
Modern technologies of Telecommunication for the accessibility to historical sites and museums for disabled people
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