The American College of Thessaloniki
Thessaloniki, Greece

Anatolia College , or sometimes the American College , is a private, non-profit, educational institution located in Pylaia, a suburb of Thessaloniki, Greece. The school has three subdivisions: Anatolia Elementary, Anatolia High School and the American College of Thessaloniki, , the tertiary division of the institution.Students achieved 100% university placement in 2008 and 2010. It is the only school in Greece with a full boarding program and retains Greece's most extensive scholarship program. Wikipedia.

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Ninou E.G.,Aristotle University of Thessaloniki | Paschalidis K.A.,Technological Educational Institute of Crete | Mylonas I.G.,Aristotle University of Thessaloniki | Vasilikiotis C.,The American College of Thessaloniki | Mavromatis A.G.,Aristotle University of Thessaloniki
Acta Agriculturae Scandinavica Section B: Soil and Plant Science | Year: 2017

This study aims to investigate the response of 10 Greek Oregano (Origanum vulgare subsp. hirtum) populations, collected across Greece, under 3 levels of N-fertilization during 2012 and 2013. The populations were differentiated for dry matter (from 32.7 to 63.3 g·pot−1), for essential oil content (from 2.31 to 5.86 ml·100−1 g dry weight) and for amount of essential oil (from 1.37 to 2.46 ml·pot−1), for both years. Those with the highest dry matter (1-“Palaiochori” and 5-“Gliki”) and the highest essential oil content (10-“Gytheio” and 9-“Achladocastro”) were superior by 30%, as compared to the general mean of the experiment. The populations 3-“Litochoro” and 5-“Gliki” had an increased amount of essential oil (24%) as compared to the general mean of the experiment. An additional nitrogen supply (N0 to N1 level) increased dry matter production and amount of essential oil per pot, while decreased essential oil content for all populations. Further increase of nitrogen supply, favored six populations for dry matter production and two populations for amount of essential oil per pot while had almost no effect on five populations for essential oil content. The superior populations could be used in a breeding program as starting material for the development of new cultivars. © 2017 Informa UK Limited, trading as Taylor & Francis Group

Rousidis D.,University of Alcalá | Rousidis D.,Alexander Technological Educational Institute of Thessaloniki | Garoufallou E.,Alexander Technological Educational Institute of Thessaloniki | Balatsoukas P.,University of Manchester | And 3 more authors.
Communications in Computer and Information Science | Year: 2013

Social media have transformed the way modern science is communicated. Although several studies have been focused on the use of social media for the dissemination of scientific knowledge and the measurement of the impact of academic output, we know very little about how academics cite social media in their publications. In order to address this gap, a content analysis was performed on a sample of 629 journal articles in medical informatics. The findings showed the presence of 109 citations to social media resources, the majority of which were blogs and wikis. Social media citations were used more frequently to support the literature review section of articles. However, a fair amount of citations was used in order to document various aspects of the methodology section, such as the data collection and analysis process. The paper concludes with the implications of these findings for metadata design for bibliographic databases (like PubMed and Medline). © Springer International Publishing Switzerland 2013.

Chaskopoulou A.,European Biological Control Laboratory | Chaskopoulou A.,The American College of Thessaloniki | Giantsis I.A.,European Biological Control Laboratory | Giantsis I.A.,The American College of Thessaloniki | And 2 more authors.
Acta Tropica | Year: 2016

Species composition, activity patterns and blood meal analysis of sand fly populations were investigated in the metropolitan region of Thessaloniki, North Greece from May to October 2011. Sampling was conducted weekly in 3 different environments (animal facilities, open fields, residential areas) along the outskirts of the city in areas of increased canine leishmania transmission. Six sand fly species (Phlebotomus perfiliewi, Phlebotomus tobbi, Phlebotomus simici, Plebotomus papatasi, Sergentomya minuta and Sergentomya dentata) were identified using both classical and molecular techniques. DNA barcodes were characterized for the first time for two (P. simici and S. dentata) of the six recorded species. Phylogenetic analysis based on the COI gene sequences confirmed the grouping of P. tobbi, P. perniciosus and P. perfiliewi (subgenus Larrousius) and the monophyly of P. simici (subgenus Adlerius). By far the most prevalent species was P. perfiliewi, followed by P. simici and P. tobbi. The largest populations of sand flies were collected from animal facilities, followed by residential areas and open agricultural fields. Peak activity of sand flies overall occurred mid-August to mid-September and then declined sharply in October. Blood meal analysis showed that P. perfiliewi and P. simici feed preferentially on humans (88% & 95%, respectively) but also feed on chickens and goats. When designing a control strategy to alleviate sand fly nuisance in the region of Thessaloniki the following conclusions can be reached from this study: a) August and September are high risk months due to increased sand fly activity levels, b) animal facilities within or adjacent to urban settlements are high risk areas and may act as a maintenance and amplification foci for the vector as well as the parasite, and c) the abundance, ubiquity and feeding behavior of P. perfiliewi and P. simici establishes them as potentially important vectors of Leishmania in the region. © 2016 Published by Elsevier B.V.

Zogkas A.,Alexander Technological Educational Institute of Thessaloniki | Kirsanidou I.,Alexander Technological Educational Institute of Thessaloniki | Korfitis C.,401 General Military Hospital | Kemanetzi C.,Aristotle University of Thessaloniki | And 2 more authors.
IFMBE Proceedings | Year: 2016

We present data from the development and initial testing of a novel portable dermatological scanner which offers non-invasive data acquisition from multiple dry electrodes placed on the patient’s skin. Such objective, fast and easy to obtain diagnostic data are currently not available during the patient’s first visit to the point of care. Once additional clinical research is performed to validate the output data of such a tool, associating it to medical diagnosis statistics (biopsy- verified data), it could enrich the information available to Dermatologists early in the diagnostic process. The interpretation of such objective measurement data may be particularly valuable in cases of suspicious angiogenesis which could be an early indication of malignancy. The scanner is based on electrical impedance tomography, a promising non-invasive, radiation- free and portable imaging technique. It is designed for clinical and outdoor operation and the associated translational software does not require specialized training for the operator. Initial testing results of the device are promising, suggesting it can specifically distinguish between the presence and absence of a nevus in the area of skin being scanned. Further testing is planned involving the detection of neoplasia, particularly early stage melanoma. © Springer International Publishing Switzerland 2016.

Athanasiou A.,Aristotle University of Thessaloniki | Klados M.A.,Max Planck Institute for Human Cognitive and Brain Sciences | Astaras A.,The American College of Thessaloniki | Foroglou N.,Aristotle University of Thessaloniki | And 2 more authors.
IFMBE Proceedings | Year: 2016

Neuroprosthetic control by individuals suffering from tetraplegia has already been demonstrated using implanted microelectrode arrays over the patients’ motor cortex. Based on the state of the art of such micro & nano-scale technologies, we review current trends and future prospects for the implementation of nanotechnologies in the field of Brain- Computer Interfaces (BCIs), with brief mention of current clinical applications. Micro- and Nano-Electromechanical Systems (MEMS, NEMS) and micro-Electrocorticography now belong to the mainstay of neurophysiology, producing promising results in BCI applications, neurophysiological recordings and research. The miniaturization of recording and stimulation systems and the improvement of reliability and durability, decrease of neural tissue reactivity to implants, as well as increased fidelity of said systems are the current foci of this technology. Novel concepts have also begun to emerge such as nanoscale integrated circuits that communicate with the macroscopic environment, neuronal pattern nano-promotion, multiple biosensors that have been “wired” with piezoelectric nanomechanical resonators, or even “neural dust” consisting of 10-100μm scale independent floating low-powered sensors. Problems that such technologies have to bypass include a minimum size threshold and the increase in power to maintain a high signal-to-noiseratio. Physiological matters such as immunological reactions, neurogloia or neuronal population loss should also be taken into consideration. Progress in scaling down of injectable interfaces to the muscles and peripheral nerves is expected to result in less invasive BCI-controlled actuators (neuroprosthetics in the micro and nano scale). The state-of-the-art of current microtechnologies demonstrate a maturing level of clinical relevance and promising results in terms of neural recording and stimulation. New MEMS and NEMS fabrication techniques and novel design and application concepts hold promise to address current problems with these technologies and lead to less invasive, longer lasting and more reliable BCI systems in the near future. © Springer International Publishing Switzerland 2016.

Yfantis M.,Alexander Technological Educational Institute of Thessaloniki | Raducan L.,Alexander Technological Educational Institute of Thessaloniki | Astaras A.,The American College of Thessaloniki
8th ACM International Conference on PErvasive Technologies Related to Assistive Environments, PETRA 2015 - Proceedings | Year: 2015

Sleep monitoring is an increasingly popular practice, both for medical and lifestyle purposes. In the case of infant safety monitoring, however, most of the devices used are inapplicable due to the utilisation of wires, cords, obtrusive sensors, constant radio wave transmission, low sensitivity and specificity. We proposed and are currently developing the second generation of a portable, unobtrusive infant safety system that can be fitted to most existing cots and can wirelessly tele-alert the infant's carers in case of emergency or other pre-defined circumstances. The MAIA system is based on the real-time algorithmic fusion of data obtained from multiple sensors distributed around the infant's cot, as part of a reasonably priced system which is quick to install, requires no alteration of existing infant care routines and demonstrates a high level of sensitivity and specificity.

Mavridis N.,Greek National Center For Scientific Research | Pierris G.,Greek National Center For Scientific Research | Gallina P.,University of Trieste | Moustakas N.,Aristotle University of Thessaloniki | Astaras A.,The American College of Thessaloniki
Proceedings of the 17th International Conference on Advanced Robotics, ICAR 2015 | Year: 2015

Joystick-based teleoperation is a dominant method for remotely controlling various types of robots, such as excavators, cranes, and space telerobotics. Our ultimate goal is to create effective methods for training and assessing human operators of joystick-controlled robots. Towards that goal, an extensive study consisting of a total of 38 experimental subjects on both simulated as well as a physical robot, using either no feedback or auditory feedback, has been performed. In this paper, we present the complete experimental setup and we report only on the 18 experimental subjects teleoperating the simulated robot. Multiple observables were recorded, including not only joystick and robot angles and timings, but also subjective measures of difficulty, personality and usability data, and automated analysis of facial expressions and blink rate of the subjects. Our initial results indicate that: First, that the subjective difficulty of teleoperation with auditory feedback has smaller variance as compared to teleoperation without feedback. Second, that the subjective difficulty of a task is linearly related with the logarithm of task completion time. Third, we introduce two important indicators of operator performance, namely the Average Velocity of Robot Joints (AVRJ), and the Correct-to-Wrong-Joystick Direction Ratio (CWJR), and we show how these relate to accumulated user experience and with task time. We conclude with a forward-looking discussion including future steps. © 2015 IEEE.

Keramaris V.A.,The American College of Thessaloniki | Keramaris V.A.,Kingston University | Danas K.,Kingston University
Studies in Health Technology and Informatics | Year: 2014

Current research in health informatics should provide the techniques and tools that will enable the development of an efficient hospital information ecosystem. The different information systems (IS) will be able to efficiently communicate with each other and provide a patient oriented environment. It is thus important to provide a clear understanding of this ecosystem during the analysis phase. The solution is to develop a hospital information systems ontology that will provide the infrastructure for a clear understanding of this ecosystem and thus lead to the development of systems that will be able to work efficiently with each other. This ontology is developed here and its value is demonstrated through a case study. © 2014 The authors and IOS Press. All rights reserved.

Fotiadis D.A.,Technological Educational Institution of Western Macedonia TEI WM | Astaras A.,The American College of Thessaloniki | Kalfas A.,Aristotle University of Thessaloniki | Bamidis P.D.,Aristotle University of Thessaloniki
2016 5th International Conference on Modern Circuits and Systems Technologies, MOCAST 2016 | Year: 2016

Measuring the exact position of a medical instrument inside the human body can be performed with various methods, at various levels of invasiveness and accuracy. This paper presents a novel approach which does not require added invasive procedures, yet can achieve a comparatively high (sub-millimeter) level of accuracy. It exploits the phase shift of the signal originating from a transmitter embedded into the tip of the medical instrument, concluding its displacement with respect to a set of stationary receivers. The aforementioned phase shift is converted to a low frequency voltage with the use of a Phased Locked Loop (PLL). This voltage can subsequently be converted into a displacement in space, providing an estimate of the position of the medical instrument using trilateration. The instrument's displacement can be defined against either the time or frequency domain. This paper presents displacement measurement data from a transmitter moving at a constant velocity, filtered through the Locally Weighted Scatter-Plot Smoothing (LOWESS) curve fitting method or a Lomb-Scargle periodogram. The Lomb-Scargle periodogram is based on the least-squares power spectrum and can be used instead of waveform smoothing and measurement into the time domain, providing more precise and accurate measurement results as compared to the LOWESS curve fitting method. © 2016 IEEE.

Gertsis A.,The American College of Thessaloniki | Zoukidis K.,The American College of Thessaloniki | Vasilikiotis C.,The American College of Thessaloniki
CEUR Workshop Proceedings | Year: 2015

Irrigation water quality became worst in terms of increasing its salinity and causes severe problems in many cultivated crop species, resulting in lower yield. In addition, the scarcity of irrigation water due to overuse or runoff is another limitation for increasing food and feed production. Saline water treatment technology offers potential solutions; however this technology is yet expensive and not cost effective for large scale. This study evaluates a water treatment technology (MAXGROW) using ultra sound for treating saline water, for its potential to minimize effects of saline irrigation water and its possible effects of crop productivity. A greenhouse study in pots was undertaken using two substrates (a sandy loam soil and a mixture of pumice and a composted material), four vegetable species (green onions, spinach, radishes and arugula) which were irrigated with two qualities of irrigation water (a highly saline and a regular irrigation water) treated and untreated with the MAXGROW technology. The results showed an increased yield caused by the treated saline water in almost all species and in both growth substrates. The potential of this device was shown to be promising and it is currently under continuous evaluation using more species and higher salinity level irrigation water. Irrigation water efficiency is a potential deliverable from the system. © 2015 for this paper by its authors.

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