A5020305019- Advanced Wireless Communication Technologies
- Wireless Communication Security Techniques
- Antenna Design and Analysis
- Inflammatory Bowel Disease
- Satellite Communication Systems
- Microscopic Colitis
- Autoimmune and Inflammatory Disorders
- Indoor and Outdoor Localization Technologies
- Underwater Vehicles and Communication Systems
- Metamaterials and Metasurfaces Applications
- Energy Harvesting in Wireless Networks
- Ocular Disorders and Treatments
- Telecommunications and Broadcasting Technologies
- Advanced Antenna and Metasurface Technologies
- Sparse and Compressive Sensing Techniques
- Advanced biosensing and bioanalysis techniques
- Helicobacter pylori-related gastroenterology studies
- Immunodeficiency and Autoimmune Disorders
- Systemic Lupus Erythematosus Research
- Wireless Body Area Networks
- Regional Development and Management Studies
- Distributed Control Multi-Agent Systems
- Mathematical and Theoretical Epidemiology and Ecology Models
- Cellular Automata and Applications
- Asthma and respiratory diseases
University Hospital of Ioannina
2015-2025
University of Ioannina
2016-2024
National and Kapodistrian University of Athens
2020-2024
General University Hospital of Patras
2010-2024
ZTE (China)
2023
South China University of Technology
2022
Technology Innovation Institute
2022
Infection Prevention Society
2020
Summary Background The risk of urinary tract cancers, including kidney and bladder was increased in transplant recipients receiving thiopurines. Aim To assess the cancers patients with inflammatory bowel disease ( IBD ) thiopurines CESAME observational cohort. Methods Between May 2004 June 2005, 19 486 , 30.1% whom were thiopurines, enrolled. Median follow‐up 35 months IQR : 29–40). Results Ten six developed respectively cancer. incidence rates cancer 0.48/1000 patient‐years (95% CI...
Abstract Reconfigurable intelligent surfaces (RISs) constitute the key enabler for programmable electromagnetic propagation environments and are lately being considered as a candidate physical-layer technology demanding connectivity, reliability, localisation, sustainability requirements of next-generation wireless networks. In this paper, we first present deployment scenarios RIS-enabled smart that have been recently designed within ongoing European Union Horizon 2020 RISE-6G project, well...
Wireless communications empowered by Reconfigurable Intelligent Surfaces (RISs) are recently gaining remarkable research attention due to the increased system design flexibility offered RISs for diverse functionalities. In this paper, we consider a Multiple Input Output (MIMO) physical layer security with multiple data streams including one legitimate and eavesdropping passive RISs, former being transparent eavesdropper latter's presence unknown at link. We first focus on subsystem present...
The potential of Reconfigurable Intelligent Surfaces (RISs) for energy-efficient and performance-boosted wireless communications is recently gaining remarkable research attention, motivating their consideration various 5-th Generation (5G) Advanced beyond applications. In this paper, we consider a Multiple-Input Multiple-Output (MIMO) Physical Layer Security (PLS) system with multiple data streams including one legitimate passive RIS malicious RIS, the former being transparent to...
Reconfigurable Intelligent Surfaces (RISs) constitute the enabler for programmable propagation of electromagnetic signals, and are lately being considered as a candidate physicallayer technology demanding connectivity, reliability, localization, sustainability requirements next generation wireless communications networks. In this paper, we present various deployment scenarios RIS-enabled smart environments that have been recently designed by ongoing EU H2020 RISE-6G project. The taxonomized...
Aim To report on the efficacy and safety of elective switching from intravenously (IV) to subcutaneously (SC) administered Infliximab (IFX) in patients with immune mediated diseases. Methods Retrospective analysis Crohn’s disease (CD), Ulcerative Colitis (UC), Spondyloarthritis (SpA), Rheumatoid Arthritis (RA), Psoriatic (PsA) chronic plaque Psoriasis (PsO) who were receiving IFX-IV for maintenance remission tertiary referral centers switched IFX-SC based their physician’s choice. All...
Reconfigurable Intelligent Surfaces (RISs) are an emerging technology for future wireless communication systems, enabling improved coverage in energy efficient manner. RISs usually metasurfaces, constituting of two-dimensional arrangements metamaterial elements, whose individual re-sponse is commonly modeled the literature as adjustable phase shifter. However, this model holds only narrowband communications, and when wideband transmissions utilized, one has to account frequency selectivity...
<p>The potential of Reconfigurable Intelligent Surfaces (RISs) for energy-efficient and performance-boosted wireless communications is recently gaining remarkable research attention, motivating their consideration various $5$-th Generation (5G) Advanced beyond applications. In this paper, we consider a Multiple-Input Multiple-Output (MIMO) Physical Layer Security (PLS) system with multiple data streams including one legitimate passive RIS malicious RIS, the former being transparent to...
This work lies at the intersection of two cutting edge technologies envisioned to proliferate in future 6G wireless systems: Multi-access Edge Computing (MEC) and Reconfigurable Intelligent Surfaces (RISs). While former will bring a powerful information technology environment edge, latter enhance communication performance, thanks possibility adapting propagation as per end users' convenience, according specific service requirements. We propose joint optimization radio, computing,...
The technology of Reconfigurable Intelligent Surfaces (RISs) has lately attracted considerable interest from both academia and industry as a low-cost solution for coverage extension signal propagation control. In this paper, we study the downlink multi-cell wideband communication system comprising single-antenna Base Stations (BSs) their associated users, well multiple passive RISs. We assume that each BS controls separate RIS performs Orthogonal Frequency Division Multiplexing (OFDM)...
Post-inflammatory polyps [PIPs] are considered as indicators of previous episodes severe inflammation and mucosal ulceration. Inflammatory bowel disease [IBD], namely Crohn's [CD] ulcerative colitis [UC], exhibit a perpetuating, relapsing remitting pattern, PIPs frequent sequela chronicity. The aim this study was to determine whether high PIP burden is associated with more course in patients IBD.This multinational, multicentre, retrospective study. IBD previously diagnosed were retrieved...
The cooperative jamming (CJ) and decode–and–forward (DF) protocols for physical layer security are studied in this paper. We propose a design that aims at maximizing the gap, which is defined as signal–to–noise ratio (SNR) difference between destination an eavesdropper, subject to reliability constraints defining thresholds on received signals' SNR values eavesdropper. A fractional quadratically constrained quadratic program (QCQP) formulated, solved analytically closed–form expressions...
Dimitrios Diamantopoulos-Kogkas, Pavlos Georgiou, Christos Pitros, Chrysanthi Papageorgopoulou, Marios Papasotiriou, Nikolaos Karydis, Koutsoyiannis, Athina Mougiou, Konstantinos Katsanos, and Spyros Papadoulas. Vasc Specialist Int 2024;40:. https://doi.org/10.5758/vsi.240022
The plethora of wirelessly connected devices, whose deployment density is expected to largely increase in the upcoming sixth Generation (6G) wireless networks, will naturally necessitate substantial advances multiple access schemes. Reconfigurable Intelligent Surfaces (RISs) constitute a candidate 6G technology capable offer dynamic over-the-air signal propagation programmability, which can be optimized for efficient non-orthogonal multitude devices. In this paper, we study downlink wideband...