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Multibeam Dual-Circularly Polarized Reflectarray for Connected and Autonomous Vehicles

Qi Luo, Steven Gao, Wenting Li, Mohammed Sobhy, Ioanna Bakaimi, Ch Kees de Groot, Brian Hayden, Ian Reaney, Yang Xuexia
2019 IEEE Transactions on Vehicular Technology  
Ioanna Bakaimi is a Research Fellow in the Advanced Composite Materials Group at the Chemistry Department University of Southampton.  ... 
doi:10.1109/tvt.2019.2897218 fatcat:dqggnzhfjnellmavodyln26ava

Collective Intelligence Generation from User Contributed Content [chapter]

Vassilios Solachidis, Phivos Mylonas, Andreas Geyer-Schulz, Bettina Hoser, Sam Chapman, Fabio Ciravegna, Vita Lanfranchi, Ansgar Scherp, Steffen Staab, Costis Contopoulos, Ioanna Gkika, Byron Bakaimis (+3 others)
2009 Studies in Classification, Data Analysis, and Knowledge Organization  
In this paper we provide a foundation for a new generation of services and tools. We define new ways of capturing, sharing and reusing information and intelligence provided by single users and communities, as well as organizations by enabling the extraction, generation, interpretation and management of Collective Intelligence from user generated digital multimedia content. Different layers of intelligence are generated, which together constitute the notion of Collective Intelligence. The
more » ... ic generation of Collective Intelligence constitutes a departure from traditional methods for information sharing, since information from both the multimedia content and social aspects will be merged, while at the same time the social dynamics will be taken into account. In the context of this work, we present two case studies an Emergency Response and a Consumers Social Group case study. 2 Solachidis
doi:10.1007/978-3-642-01044-6_70 fatcat:5gqlwbmgczgrrbcmi7bnfprs6q

Hydration-induced spin-glass state in a frustrated Na-Mn-O triangular lattice

Ioanna Bakaimi, Rosaria Brescia, Craig M. Brown, Alexander A. Tsirlin, Mark A. Green, Alexandros Lappas
2016 Physical review B  
Birnessite compounds are stable across a wide range of compositions that produces a remarkable diversity in their physical, electrochemical and functional properties. These are hydrated analogues of the magnetically frustrated, mixed-valent manganese oxide structures, with general formula, NaxMnO2. Here we demonstrate that the direct hydration of layered rock-salt type a-NaMnO2, with the geometrically frustrated triangular lattice topology, yields the birnessite type oxide, Na0.36MnO2 0.2H2O,
more » ... ansforming its magnetic properties. This compound has a much-expanded interlayer spacing compared to its parent a-NaMnO2 compound. We show that while the parent a-NaMnO2 possesses a Neel temperature of 45 K as a result of broken symmetry in the Mn3+ sub-lattice, the hydrated derivative undergoes collective spin-freezing at 29 K within the Mn3+/Mn4+ sub-lattice. Scaling-law analysis of the frequency dispersion of the AC susceptibility, as well as the temperature-dependent, low-field DC magnetization confirm a cooperative spin-glass state of strongly interacting spins. This is supported by complementary spectroscopic analysis (HAADF-STEM, EDS, EELS) as well as by a structural investigation (high-resolution TEM, X-ray and neutron powder diffraction) that yield insights into the chemical and atomic structure modifications. We conclude that the spin-glass state in birnessite is driven by the spin-frustration imposed by the underlying triangular lattice topology that is further enhanced by the in-plane bond-disorder generated by the mixed-valent character of manganese in the layers.
doi:10.1103/physrevb.93.184422 fatcat:pt3jbb3mivdmtd5u27mvbgn7km

Manganese doped-iron oxide nanoparticle clusters and their potential as agents for magnetic resonance imaging and hyperthermia

Maria F. Casula, Erika Conca, Ioanna Bakaimi, Ayyappan Sathya, Maria Elena Materia, Alberto Casu, Andrea Falqui, Elisa Sogne, Teresa Pellegrino, Antonios G. Kanaras
2016 Physical Chemistry, Chemical Physics - PCCP  
A method for water-soluble Mn doped iron oxide clusters and their magnetic properties.
doi:10.1039/c6cp02094a pmid:27282828 fatcat:hhzll4xphrevjejq6yiicldgu4

Incommensurate atomic and magnetic modulations in the spin-frustrated β−NaMnO2 triangular lattice

Fabio Orlandi, Eleni Aza, Ioanna Bakaimi, Klaus Kiefer, Bastian Klemke, Andrej Zorko, Denis Arčon, Christopher Stock, George D. Tsibidis, Mark A. Green, Pascal Manuel, Alexandros Lappas
Preliminary830 evidence for such a type of behavior in β-NaMnO 2 was 831 first reported by Bakaimi et al. who demonstrated that the 832 temperature-dependent dielectric permittivity ε ′ (T) displays 833  ... 
doi:10.1103/physrevmaterials.2.074407 fatcat:jkcncsmhhfb5nlhtlrars6ikfe