Πλοήγηση ανά Συγγραφέα "Stamoulis, G."
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A 2.45GHz power harvesting circuit in 90nm CMOS
Giannakas, G.; Plessas, F.; Nassopoulos, G.; Stamoulis, G. (2010)In this work, an overview of the state-of-the-art of the design techniques of power harvesting (rectifYing) circuits is presented. The evolution of each circuit, the advantages and design constraints, are investigated and ... -
2D simulator for eddy current field filters
Liakou, F.; Dimitropoulos, P.; Stamoulis, G. (2011)Hall devices are magnetic field current sensors based on the Hall effect. A bias current is applied via contacts through the Hall plates which are placed along magnetic field. High frequency components affect the Hall ... -
An automatic multi-agent web image and associated keywords retrieval system
Papadakis, N.; Ntalianis, K.; Doulamis, A.; Stamoulis, G. (2009)Web-based image search engines and CBIR techniques are blind to the actual content. As a result querying for a specific object is often cluttered with irrelevant data, leading to low precision. Furthermore recall rates are ... -
Characterization of the worst-case current waveform excitations in general RLC-model power grid analysis
Evmorfopoulos, N.; Rammou, M. A.; Stamoulis, G.; Moondanos, J. (2010)Validating the robustness of power distribution in modem IC design is a crucial but very difficult problem, due to the vast number of possible working modes and the high, operating frequencies which necessitate the modeling ... -
Energy-aware joint power, packet and topology optimization by simulated annealing for WSNs
Xenakis, A.; Foukalas, F.; Stamoulis, G.; Khattab, T. (2013)Energy-aware connectivity in wireless sensor networks (WSNs) can increase their network lifetime. This can be achieved by optimizing the power control, a particular communication mechanism and the topology control. To this ... -
Fast and accurate BER estimation methodology for I/O links based on extreme value theory
Cevrero, A.; Evmorfopoulos, N.; Antoniadis, C.; Ienne, P.; Leblebici, Y.; Burg, A.; Stamoulis, G. (2013)This paper introduces a novel approach towards the statistical analysis of modern high-speed 110 and similar communication links; which is capable of reliably to determine extremely low (-10-2 or lower) bit error rates ... -
A framework for secure data delivery in wireless sensor networks
Perlepes, L.; Zaharis, A.; Stamoulis, G.; Kikiras, P. (2012)Typical sensor nodes are resource constrained devices containing user level applications, operating system components, and device drivers in a single address space, with no form of memory protection. A malicious user could ... -
General development of a new hall effect sensor
Petoussis, V. N.; Dimitropoulos, P. D.; Stamoulis, G. (2011)Silicon Hall plates show an offset of a few millitesla. A large portion of this offset is caused by mechanical stress in the device. The offset can be reduced with a factor 103 to 105 when the spinning - current principle ... -
A high performance and low power hardware architecture for the transform & quantization stages in H.264
Owaida, M.; Koziri, M.; Katsavounidis, I.; Stamoulis, G. (2009)In this work, we present a hardware architecture prototype for the various types of transforms and the accompanying quantization, supported in H.264 baseline profile video encoding standard. The proposed architecture ... -
i-Protect: An open source emergency management framework
Nef, M. A.; Filippopoulos, I.; Voumvourakis, E.; Aggelis, A.; Perlepes, L.; Stamoulis, G.; Kikiras, P. (2011)Emergency management is an essential capability in modern society. As disasters can happen at any time and can differ from each other considerably, it is necessary to develop a supple framework which can comply with each ... -
Intelligent Parking Management System Based on Wireless Sensor Network Technology
Larisis, N.; Perlepes, L.; Stamoulis, G.; Kikiras, P. (2013)Wireless Sensor Networks can be considered as one of the most challenging and emerging technologies empowering the provision of enhanced services to miscellaneous application domains. The objective of this paper is to ... -
Introducing a new hall effect sensor - Novel dynamic offset reduction method
Petoussis, V. N.; Dimitropoulos, P.; Stamoulis, G.; Houstis, E. (2011)Silicon Hall plates show an offset of a few millitesla. A large portion of this offset is caused by mechanical stress in the device. The offset can be reduced when the spinning-current principle is applied. In this paper ... -
Investigating Wireless Sensor Network lifetime under static routing with unequal energy distribution
Xenakis, A.; Katsavounidis, I.; Stamoulis, G. (2012)In a Wireless Sensor Network (WSN) the sensed data must be gathered and transmitted to a base station where it is further processed by end users. Since that kind of network consists of low-power nodes with limited battery ... -
A low-power VLSI architecture for intra prediction in H.264
Stamoulis, G.; Koziri, M.; Katsavounidis, I.; Bellas, N. (2005)The H.264 video coding standard can achieve considerably higher coding efficiency than previous standards. The key to this high code efficiency are mainly the Intra and Inter prediction modes provided by the standard. ... -
A macromodel technique for VLSI dynamic simulation by mapping pre-characterized transitions
Bountas, D.; Stamoulis, G.; Evmorfopoulos, N. (2008)Accurate simulation of digital circuits is an essential part of the design process. High precision models are generally used to confirm logic behavior and estimate power dissipation, which has become an extremely important ... -
Managing forest fires with i-protect fire simulation module
Filippopoulos, I.; Stamoulis, G.; Kikiras, P. (2012)Emergency management is an essential capability in modern society. As disasters can happen at any time and can differ from each other considerably, it is necessary to develop a supple framework which can comply with each ... -
Power, performance and area prediction of 3D ICs during early stage design exploration in 45nm
Toufexis, F.; Papanikolaou, A.; Soudris, D.; Stamoulis, G.; Bantas, S. (2011)In this work, the impact of across-chip temperature and power supply voltage variations, on performance predictions in 3D ICs, is investigated. To make this possible, a novel design flow is proposed to perform design ... -
Precise identification of the worst-case voltage drop conditions in power grid verification
Evmorfopoulos, N.; Karampatzakis, D.; Stamoulis, G. (2006)Identifying worst-case voltage drop conditions in every module supplied by the power grid is a crucial problem in modern IC design. In this paper we develop a novel methodology for power grid verification which is based ... -
Pseudo-FG technique for efficient energy harvesting
Giannakas, G.; Plessas, F.; Stamoulis, G. (2012)A novel 2.45 GHz RF power harvester has been implemented in a 90 nm standard CMOS process. The proposed architecture reduces the threshold voltage (Vth) by employing a pseudo floating-gate (pseudo-FG) new technique and ... -
Selective inversion of inductance matrix for large-scale sparse RLC simulation
Apostolopoulou, I.; Daloukas, K.; Evmorfopoulos, N.; Stamoulis, G. (2014)The inverse of the inductance matrix (reluctance matrix) is amenable to sparsification to a much greater extent than the inductance matrix itself. However, the inversion and subsequent truncation of a large dense inductance ...