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- Han, T., et al.
(författare)
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Emerging Drone Trends for Blockchain-Based 5G Networks: Open Issues and Future Perspectives
- 2021
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Ingår i: Ieee Network. - : Institute of Electrical and Electronics Engineers (IEEE). - 0890-8044 .- 1558-156X. ; 35:1, s. 38-43
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Tidskriftsartikel (refereegranskat)abstract
- Unmanned aerial vehicles, commonly known as drones, are receiving growing research interest due to their ability to carry a multitude of sensors and to connect to mobile networks. They are also able to move freely across the air, which enables the creation of numerous applications that were until now considered impracticable. However, such applications may require high computational resources, reliable connection, and high data transmission rates to accomplish different tasks. Therefore, in this work, first, we discuss 5G communication networks and mobile edge computing (MEC) as promising technologies that can provide several benefits to drone-enabled environments and solve some of the presented issues. We also comment on 5G and MEC approaches, presenting the state of the art and seeking to solve each of the latter issues presented. Afterward, we introduce new security concerns of drone communication networks, given their recent popularity. These concerns are related to the possibility of malicious users taking advantage of this brand new technology, which has made many governments ban drones due to public safety. Next, blockchain technology is brought in as a novel solution to the security issues due to its decentralized nature, making it inherently safe. This article also surveys contributions that make use of each of the technologies mentioned to improve the emerging drone industry. Subsequently, we discuss open issues and future perspectives.
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| 3. |
- Nogueira, Eugenia, et al.
(författare)
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Liposome and protein based stealth nanoparticles
- 2013
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Ingår i: Faraday discussions. - : Royal Society of Chemistry (RSC). - 1359-6640 .- 1364-5498. ; 166, s. 417-429
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Tidskriftsartikel (refereegranskat)abstract
- Liposomes and protein based nanoparticles were tuned with different polymers and glycolipids to improve stealth and thus decrease their clearance by macrophages. Liposomes were coated with polyethylene glycol (PEG) and brain-tissue-derived monosialoganglioside (GM1). Bovine serum albumin (BSA) nanoparticles were produced incorporating a PEGylated surfactant (PEG-surfactant). All obtained nanoparticles were monodisperse, with sizes ranging from 80 to 120 nm, with a zeta-potential close to zero. The presented stealth strategies lead to a decrease of internalization levels by macrophages. These surface modified nanoparticles could be used for production of new drug delivery nanosystems for systemic administration (e.g. intravenous application).
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- Stranne, Christian, et al.
(författare)
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Dynamic simulations of potential methane release from East Siberian continental slope sediments
- 2016
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Ingår i: Geochemistry Geophysics Geosystems. - 1525-2027. ; 17:3, s. 872-886
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Tidskriftsartikel (refereegranskat)abstract
- Sediments deposited along continental margins of the Arctic Ocean presumably host large amounts of methane (CH4) in gas hydrates. Here we apply numerical simulations to assess the potential of gas hydrate dissociation and methane release from the East Siberian slope over the next 100 years. Simulations are based on a hypothesized bottom water warming of 3 degrees C, and an assumed starting distribution of gas hydrate. The simulation results show that gas hydrate dissociation in these sediments is relatively slow, and that CH4 fluxes toward the seafloor are limited by low sediment permeability. The latter is true even when sediment fractures are permitted to form in response to overpressure in pore space. With an initial gas hydrate distribution dictated by present-day pressure and temperature conditions, nominally 0.35 Gt of CH4 are released from the East Siberian slope during the first 100 years of the simulation. However, this CH4 discharge becomes significantly smaller (approximate to 0.05 Gt) if glacial sea level changes in the Arctic Ocean are considered. This is because a lower sea level during the last glacial maximum (LGM) must result in depleted gas hydrate abundance within the most sensitive region of the modern gas hydrate stability zone. Even if all released CH4 reached the atmosphere, the amount coming from East Siberian slopes would be trivial compared to present-day atmospheric CH4 inputs from other sources.
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