scholarly journals An Aquatic Mobile Sensing USV Swarm with a Link Quality-Based Delay Tolerant Network

Sensors ◽  
2018 ◽  
Vol 18 (10) ◽  
pp. 3440 ◽  
Author(s):  
Daniela Sousa ◽  
Miguel Luís ◽  
Susana Sargento ◽  
Artur Pereira
Keyword(s):  
Performance Studies ◽  
Smart City ◽  
Low Cost ◽  
Data Gathering ◽  
Mobile Sensing ◽  
Delay Tolerant Network ◽  
Link Quality ◽  
Sensing Platform ◽  
Delay Tolerant ◽  
Environment Performance

The Smart City concept is starting to extend into maritime environments alongside with the increase of Unmanned Surface Vehicles (USV) models on the market. Consequently, by joining both Smart City and USV technologies, a set of platforms and applications for aquatic environments are emerging. This work proposes a low-cost aquatic mobile sensing platform for data gathering with a swarm of USVs communicating through a Delay-Tolerant Network (DTN). A set of DTN link quality-based routing strategies select the best quality path in a dynamic approach so the sensed information is able to reach the mobile gateway in a reliable way. A Link Quality Estimation (LQE) approach is proposed and its accuracy is evaluated through real experimentation. An aquatic simulation environment, considering both navigation and communication layers, was also proposed and used to evaluate the performance of the proposed routing strategies, and complement real environment performance studies.

Delay Tolerant Networks

2019 ◽  
pp. 448-480 ◽  
Author(s):  
Vandana Kushwaha ◽  
Ratneshwer Gupta
Keyword(s):  
Vehicular Networks ◽  
Low Cost ◽  
Delay Tolerant Networks ◽  
Opportunistic Networks ◽  
Delay Tolerant Network ◽  
Data Packets ◽  
Security Issues ◽  
Terrestrial Environments ◽  
Routing Congestion ◽  
Delay Tolerant

Opportunistic networks are one of the emerging evolutions of the network system. In opportunistic networks, nodes are able to communicate with each other even if the route between source to destination does not already exist. Opportunistic networks have to be delay tolerant in nature (i.e., able to tolerate larger delays). Delay tolerant network (DTNs) uses the concept of “store-carry-forward” of data packets. DTNs are able to transfer data or establish communication in remote area or crisis environment where there is no network established. DTNs have many applications like to provide low-cost internet provision in remote areas, in vehicular networks, noise monitoring, extreme terrestrial environments, etc. It is therefore very promising to identify aspects for integration and inculcation of opportunistic network methodologies and technologies into delay tolerant networking. In this chapter, the authors emphasize delay tolerant networks by considering its architectural, routing, congestion, and security issues.

scholarly journals Real-time tracking of fluorescent magnetic spore–based microrobots for remote detection of C. diff toxins

2019 ◽  
Vol 5 (1) ◽  
pp. eaau9650 ◽  
Author(s):  
Yabin Zhang ◽  
Lin Zhang ◽  
Lidong Yang ◽  
Chi Ian Vong ◽  
Kai Fung Chan ◽  
...  
Keyword(s):  
Magnetic Nanoparticles ◽  
Low Cost ◽  
Gastrointestinal Diseases ◽  
Mobile Sensing ◽  
Bacterial Toxins ◽  
Remote Detection ◽  
Carbon Nanodots ◽  
Sensing Platform ◽  
Stool Samples ◽  
Real Time Tracking

A rapid, direct, and low-cost method for detecting bacterial toxins associated with common gastrointestinal diseases remains a great challenge despite numerous studies and clinical assays. Motion-based detection through tracking the emerging micro- and nanorobots has shown great potential in chemo- and biosensing due to accelerated “chemistry on the move”. Here, we described the use of fluorescent magnetic spore–based microrobots (FMSMs) as a highly efficient mobile sensing platform for the detection of toxins secreted by Clostridium difficile (C. diff) that were present in patients’ stool. These microrobots were synthesized rapidly and inexpensively by the direct deposition of magnetic nanoparticles and the subsequent encapsulation of sensing probes on the porous natural spores. Because of the cooperation effect of natural spore, magnetic Fe3O4 nanoparticles, and functionalized carbon nanodots, selective fluorescence detection of the prepared FMSMs is demonstrated in C. diff bacterial supernatant and even in actual clinical stool samples from infectious patients within tens of minutes, suggesting rapid response and good selectivity and sensitivity of FMSMs toward C. diff toxins.

City Scanner: Building and Scheduling a Mobile Sensing Platform for Smart City Services

2018 ◽  
Vol 5 (6) ◽  
pp. 4567-4579 ◽  
Author(s):  
Amin Anjomshoaa ◽  
Fabio Duarte ◽  
Daniel Rennings ◽  
Thomas J. Matarazzo ◽  
Priyanka deSouza ◽  
...  
Keyword(s):  
Smart City ◽  
Mobile Sensing ◽  
Sensing Platform

scholarly journals Performance of Delay Tolerant Network Protocol in Smart City Scenario

2020 ◽  
Vol 1569 ◽  
pp. 022056
Author(s):  
Agussalim ◽  
Masato Tsuru ◽  
W. Nur Cahyo ◽  
P. Agung Brastama
Keyword(s):  
Smart City ◽  
Delay Tolerant Network ◽  
Network Protocol ◽  
Delay Tolerant
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