Andreas Kotsopoulos

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In the last couple of years, huge research effort has been spent focusing on the realization of wireless sensor networks, especially in the area of radio interface efficiency , power consumption, ad-hoc networking, routing etc. In this paper we would like to focus on how sensors/ actuators and sensor networks can be integrated into the Internet and(More)
Nanometer-precise positioning at ultra-high velocities is a major challenge for rapidly emerging applications that use scanning probes in order to observe and alter the properties of materials down to the nanoscale. Typical examples include surface imaging, nanolithography and data storage. For example in probe-based data storage, constant linear velocity(More)
Scanning probes are being considered as the basis for a variety of emerging nanoscale applications including sample imaging and ultra-high-density probe storage. In this work, a controller for track-follow in archimedean spiral nanopo-sitioning is presented. The proposed tracking controller is based on a Linear Quadratic Gaussian (LQG) component and a(More)
—This work focuses on modeling the dynamics of MEMS-based mobile devices, when are subject to speed-controlled human motion, using measurements from accelerome-ters mounted on the device's frame. The measurement procedure and used data acquisition setup, indicative measurements showing the effect of physical system characteristics on the resulting(More)
Nanopositioning is a key factor for a wide range of applications, such as surface imaging and ultra-high-density probe-based data storage. These applications use scanning probes in order to sense and alter the properties of the underlying medium with nanoscale precision. Recently, new scanning schemes were introduced that can lead to high-speed(More)
—This paper presents a software-based instrument for testing and monitoring the behavior of complex communications systems that employ a number of interconnected DSPs. The instrument is based on a dynamic architecture that incorporates a set of distributed software probes for signal capturing and a central data acquisition unit for acquiring and(More)
Accurate nanopositioning is of significant importance in modern Atomic Force Microscopy (AFM) applications that demand high-speed and ultra-precise probe operation. In such applications, position sensors are mostly used in order to provide the control mechanism with feedback regarding probe movement. It has been shown experimentally that the measurement(More)
High precision nanopositioning is a crucial function of high-density probe-based storage devices and its performance affects determinatively the device's reliability. The use of non-conventional nanopositioning schemes for achieving much higher data rates imposes new requirements on the control algorithms. In this work we analyze in terms of accuracy and(More)
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