Browsing by Author "Georgiou, Julius"

Now showing items 1-20 of 26

    • Conference Object  

      ABSense: Sensing Electromagnetic Waves on Metasurfaces via Ambient Compilation of Full Absorption 

      Liaskos, C.; Pirialakos, G.; Pitilakis, A.; Abadal, S.; Tsioliaridou, A.; Tasolamprou, A.; Tsilipakos, O.; Kantartzis, N.; Ioannidis, S.; Alarcon, E.; Cabellos, A.; Kafesaki, M.; Pitsillides, Andreas; Kossifos, K.; Georgiou, Julius; Akyildiz, I. F. (2019)
      Metasurfaces constitute effective media for manipulating and transforming impinging EM waves. Related studies have explored a series of impactful MS capabilities and applications in sectors such as wireless communications, ...
    • Conference Object  

      ABSense: Sensing Electromagnetic Waves on Metasurfaces via Ambient Compilation of Full Absorption 

      Liaskos, C.; Pirialakos, G.; Pitilakis, A.; Abadal, S.; Tsioliaridou, A.; Tasolamprou, A.; Tsilipakos, O.; Kantartzis, N.; Ioannidis, S.; Alarcon, E.; Cabellos, A.; Kafesaki, M.; Pitsillides, Andreas; Kossifos, K.; Georgiou, Julius; Akyildiz, I. F. (2019)
      Metasurfaces constitute effective media for manipulating and transforming impinging EM waves. Related studies have explored a series of impactful MS capabilities and applications in sectors such as wireless communications, ...
    • Conference Object  

      Asynchronous Circuits as an Enabler of Scalable and Programmable Metasurfaces 

      Petrou, Loukas; Karousios, Petros; Georgiou, Julius (2018)
      Metamaterials and metasurfaces have given possibilities for manipulating electromagnetic (EM) waves that in the past would have seemed impossible. The majority of metasurface designs are suitable for a particular frequency ...
    • Conference Object  

      Chua Mem-Components for Adaptive RF Metamaterials 

      Georgiou, Julius; Kossifos, K. M.; Antoniades, Marco A.; Jaafar, A.H.; Kemp, N. T. (2018)
      Chua's mem-components are ideal for creating adaptive metasurfaces for manipulating EM waves given that they hold their state without external biases. In this paper, we propose a generic adaptive reactive element that is ...
    • Article  

      A Durable, Screen-Printed Sensor for In Situ and Real-Time Monitoring of Concrete's Electrical Resistivity Suitable for Smart Buildings/Cities and IoT 

      Sophocleous, Marios; Savva, Pericles; Petrou, Michael F.; Atkinson, John K.; Georgiou, Julius (2018)
      This article shows initial experimental results on the utilization of a durable, low-cost, screen-printed resistivity sensor in concrete for real-time measurements, with the aim of correlating concrete's electrical resistivity ...
    • Article  

      Exploration of Intercell Wireless Millimeter-Wave Communication in the Landscape of Intelligent Metasurfaces 

      Tasolamprou, Anna C.; Pitilakis, Alexandros; Abadal, Sergi; Tsilipakos, Odysseas; Timoneda, Xavier; Taghvaee, Hamidreza; Sajjad Mirmoosa, Mohammad; Liu, Fu; Liaskos, Christos K.; Tsioliaridou, Ageliki; Ioannidis, Sotiris; Kantartzis, Nikolaos V.; Manessis, Dionysios; Georgiou, Julius; Cabellos-Aparicio, Albert; Alarcón, Eduard; Pitsillides, Andreas; Akyildiz, Ian F.; Tretyakov, Sergei A.; Economou, Eleftherios N.; Kafesaki, Maria; Soukoulis, Costas M. (2019)
      Software-defined metasurfaces are electromagnetically ultra-thin, artificial components that can provide engineered and externally controllable functionalities. The control over these functionalities is enabled by the ...
    • Article  

      Exploration of Intercell Wireless Millimeter-Wave Communication in the Landscape of Intelligent Metasurfaces 

      Tasolamprou, Anna C.; Pitilakis, Alexandros; Abadal, Sergi; Tsilipakos, Odysseas; Timoneda, Xavier; Taghvaee, Hamidreza; Sajjad Mirmoosa, Mohammad; Liu, Fu; Liaskos, Christos; Tsioliaridou, Ageliki; Ioannidis, Sotiris; Kantartzis, Nikolaos V.; Manessis, Dionysios; Georgiou, Julius; Cabellos-Aparicio, Albert; Alarcón, Eduard; Pitsillides, Andreas; Akyildiz, Ian F.; Tretyakov, Sergei A.; Economou, Eleftherios N.; Kafesaki, Maria; Soukoulis, Costas M. (2019)
      Software-defined metasurfaces are electromagnetically ultra-thin, artificial components that can provide engineered and externally controllable functionalities. The control over these functionalities is enabled by the ...
    • Conference Object  

      Fault Adaptive Routing in Metasurface Controller Networks 

      Saeed, Taqwa; Skitsas, Constantinos; Kouzapas, Dimitrios; Lestas, Marios; Soteriou, Vassos; Philippou, Anna; Abadal, Sergi; Liaskos, Christos; Petrou, Loukas; Georgiou, Julius; Pitsillides, Andreas (2018)
      HyperSurfaces are a merge of structurally reconfigurable metasurfaces whose electromagnetic properties can be changed via a software interface, using an embedded miniaturized network of controllers, thus enabling novel ...
    • Conference Object  

      Fault Adaptive Routing in Metasurface Controller Networks 

      Saeed, Taqwa; Skitsas, Constantinos; Kouzapas, Dimitrios; Lestas, Marios; Soteriou, Vassos; Philippou, Anna; Abadal, Sergi; Liaskos, Christos K.; Petrou, Loukas; Georgiou, Julius; Pitsillides, Andreas (2018)
      HyperSurfaces are a merge of structurally reconfigurable metasurfaces whose electromagnetic properties can be changed via a software interface, using an embedded miniaturized network of controllers, thus enabling novel ...
    • Conference Object  

      Fault Tolerance in Programmable Metasurfaces: The Beam Steering Case 

      Taghvaee, Hamidreza; Abadal, Sergi; Georgiou, Julius; Cabellos-Aparicio, Albert; Alarcón, Eduard (2019)
      Metasurfaces, the two-dimensional counterpart of metamaterials, have caught great attention thanks to their powerful control over electromagnetic waves. Recent times have seen the emergence of a variety of metasurfaces ...
    • Conference Object  

      Formal Verification of a Programmable Hypersurface 

      Kouvaros, Panagiotis; Kouzapas, Dimitrios; Philippou, Anna; Georgiou, Julius; Petrou, Loukas; Pitsillides, Andreas (Springer International Publishing, 2018)
      A metasurface is a surface that consists of artificial material, called metamaterial, with configurable electromagnetic properties. This paper presents work in progress on the design and formal verification of a programmable ...
    • Conference Object  

      Formal Verification of a Programmable Hypersurface 

      Kouvaros, Panagiotis; Kouzapas, Dimitrios; Philippou, Anna; Georgiou, Julius; Petrou, Loukas; Pitsillides, Andreas (Springer International Publishing, 2018)
      A metasurface is a surface that consists of artificial material, called metamaterial, with configurable electromagnetic properties. This paper presents work in progress on the design and formal verification of a programmable ...
    • Article  

      High-frequency, dielectric spectroscopy for the detection of electrophysiological/biophysical differences in different bacteria types and concentrations 

      Russel, Mohammad; Sophocleous, Marios; JiaJia, Shan; Xu, Weiping; Xiao, Lehui; Maskow, Thomas; Alam, Mahbub; Georgiou, Julius (2018)
      This paper describes a novel technique to quantify and identify bacterial cultures of Bacillus Subtilis (2.10–1.30 × 109 CFU mL−1) and Escherichia Coli (1.60–1.00 × 109 CFU mL−1), in corn oil using dielectric spectroscopy ...
    • Article  

      Intelligent Metasurfaces with Continuously Tunable Local Surface Impedance for Multiple Reconfigurable Functions 

      Liu, Fu; Tsilipakos, Odysseas; Pitilakis, Alexandros; Tasolamprou, Anna C.; Mirmoosa, Mohammad Sajjad; Kantartzis, Nikolaos V.; Kwon, Do-Hoon; Georgiou, Julius; Kossifos, Kypros; Antoniades, Marco A.; Kafesaki, Maria; Soukoulis, Costas M.; Tretyakov, Sergei A. (2019)
      Electromagnetic metasurfaces can be characterized as intelligent if they are able to perform multiple tunable functions, with the desired response being controlled by a computer influencing the individual electromagnetic ...
    • Article  

      Low-Power, Subthreshold Reference Circuits for the Space Environment: Evaluated with γ-rays, X-rays, Protons and Heavy Ions 

      Andreou, Charalambos M.; González-Castaño, Diego Miguel; Gerardin, Simone; Bagatin, Marta; Gómez Rodriguez, Faustino; Paccagnella, Alessandro; Prokofiev, Alexander V.; Javanainen, Arto; Virtanen, Ari; Liberali, Valentino; Calligaro, Cristiano; Nahmad, Daniel; Georgiou, Julius (2019)
      The radiation tolerance of subthreshold reference circuits for space microelectronics is presented. The assessment is supported by measured results of total ionization dose and single event transient radiation-induced ...
    • Article  

      Modeling and Performance Comparison of Screen-Printed, Impedance Spectroscopy Probes for Harsh Environments 

      Sophocleous, Marios; García-Breijo, Eduardo; Atkinson, John K.; Georgiou, Julius (2020)
      This paper compares the simulated performance of three different screen-printed probe geometries for Electrochemical Impedance Spectroscopy probes for use in harsh environments. The best performing probe, which is equipped ...
    • Article  

      NiTi memristive behavior 

      Stavrinides, S. G.; Antoniades, I. P.; Georgiou, Julius; Hatzikraniotis, E. (2019)
      In this paper, the experimental study and confirmation of the memristive behavior demonstrated by nanowires made of a smart alloy, namely NiTi, are presented. Further contribution to the characterization of the proposed ...
    • Conference Object  

      An Optically-Programmable Absorbing Metasurface 

      Kossifos, K. M.; Antoniades, Marco A.; Georgiou, Julius; Jaafar, A. H.; Kemp, N. T. (2018)
      A tunable metasurface absorber is presented in this work using an optically-programmable capacitor as the tuning element. The tuning element does not employ conventional semiconductor technologies to operate but rather a ...
    • Article  

      Small bowel tumours: update in diagnosis and management 

      Rondonotti, Emanuele; Koulaouzidis, Anastasios; Georgiou, Julius; Pennazio, Marco (2018)
      PURPOSE OF REVIEW: The aim of this study was to summarize the role of recently developed diagnostic techniques in the diagnosis and management of patients with small bowel tumours (SBTs). RECENT FINDINGS: Recent studies ...
    • Conference Object  

      Software-Defined Metasurface Paradigm: Concept, Challenges, Prospects 

      Pitilakis, A.; Tasolamprou, A.C.; Liaskos, C.; Liu, F.; Tsilipakos, O.; Wang, X.; Mirmoosa, M.S.; Kossifos, K.; Georgiou, Julius; Pitsilides, Andreas; Kantartzis, N.V.; Ioannidis, S.; Economou, E.N.; Kafesaki, M.; Tretyakov, S.A.; Soukoulis, C.M. (2018)
      HyperSurfaces (HSFs) are devices whose electromagnetic (EM) behavior is software- driven, i.e., it can be defined programmatically. The key components of this emerging technology are the metasurfaces, artificial layered ...