Download Archimedes III Session

Archimedes III Session II
Chair: J. Kaldellis - P. Kyriazopoulos- A. Routoulas
B.2.1. Development of an integrated electronic wearable system for measuring
and wireless transmission of biological signals: A feasibility study
D. I. Tseles
Abstract
The development of a special Data Acquisition System (DAS) for measuring
biological signals is the main subject of this presentation. The wearable system
promises to be effective for continuous monitoring Human Body Activity (HBA). The
DAS, based on a microprocessor, can acquire data through sensors that can be
implemented using gold plated innovative fibrous sensors that can be integrated in the
instrument. The prototype sensor is consisted of a sensor made by conductive fibres
integrated into the garment that work together with the other electronic components of
the system. The system sends the produced data stream to a central management and
control system, which may be located in the same or other remote geographical point.
The whole system is distinguished by small physical dimensions as to not interfere
with other components integrated in textiles and clothing and to be used for HBA.
Particular attention is given to the extremely low power consumption, so that the
autonomy of the system will be at higher levels. The system enables data acquisition,
buffering and sequencing, and it can be used as a stand alone DAS. Supported devices
include accelerometers for motion detection, IR active-tag readers for location and
proximity detection, audio input and output devices, battery monitors, GPS, analog
two channel EKG/EMG, two channel galvanic skin response sensors, and skintemperature sensors. The hardware uses common interfaces to communicate with a
wide range of commercially available sensors for monitoring pulse oxymetry,
respiration, blood pressure, EEG, blood sugar and CO2 levels.
Keywords Data Acquisition System (DAS), monitoring of human body activity,
Textile Sensors (TS)
B.2.2. Multifunctional fabric structures with conductive polymers and
incorporated electrorheological materials
S. Vassiliadis
Abstract
The present research activity aims to design, develop, produce and test a new
multifunctional textile based material, which take advantage of the combined electric
and mechanical properties of its composing elements. Multifunctional materials are of
increased research interest with very promising industrial applications perspectives, as
they are capable of covering multiple user needs at low cost and with reduced
structural complexity.
The theoretical and experimental analysis of the ERMs' (ElectroRheological
Materials) composition and behavior in conjunction with the selected textile structures
will highlight the parameters that differentiate ERMs' performances and the
procedures that control ERMs' properties as well as the final properties of the deriving
combined multifunctional material.
Keywords: multifunctional materials, ERM, Electrorheological materials
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B.2.3. Novel and highly efficient hybrid organic photovoltaic cells (HYOPVS)
S. Savaidis
Abstract
This project proposes the design, development, electrooptical characterization and
modeling of novel, highly efficient, nanostructured hybrid organic photovoltaic cells
(HyOPVs) based on a combination of polymeric-organic semiconductors and
inorganic molecular as well as metal oxide-based materials. The proposed device
structures will consist of solution-processable nanostructured bulk-heterojunctions of
polymeric materials (in particular, polythiophene derivatives as p-type
semiconductors) either with fullerene derivatives or with inorganic polyoxometalate
(POM) molecular oxides (as n-type semiconductors) with appropriate highest
occupied and lowest unoccupied molecular orbital energies. Semiconducting thin
nanocrystalline films of metal oxides with suitable valence and conduction band
energies will be used for the modification of the electrodes’ interfaces with the
photoactive layer. These devices exhibit the advantage of having independent control
of the optoelectronic properties and the morphology of the photoactive and the charge
extraction/transport layers as they can be deposited either from orthogonal solvents or
by thermal evaporation. A combination of commercially available and new, low band
gap, organic photoactive materials with POM-based molecular as well as metal oxides
will be employed. The materials’ electrooptic characteristics and the morphology of
the nanostructured films will be investigated and a detailed understanding of the
correlation between the materials’ chemical structure and their optoelectronic
properties will provide valuable guidelines for the improvement of the device
efficiency. Simulation models based on transmission line theory will be also
developed for the calculation of the distribution of the optical intensity and the
estimation of the corresponding device photocurrent and quantum efficiency. Using
the aforementioned models, the optimization of the proposed structures will be
conducted for normal and inclined illumination.
B.2.4.Novel low power consumption hybrid OLEDs with improved operational
characteristics
N. A. Stathopoulos,
Abstract
Due to the negative human impact on the global environment and the climate changes
that followed, there is an imperative need to design and develop environmentally
friendly and low power consumption devices (green products), such as organic
electronic devices. Organic light-emitting diodes (OLEDs) have been the topic of
intense research and are among the most advanced technologies in the emerging field
of organic electronics. The demonstration of colour tunability and high efficiency has
brought OLEDs into the displays and lighting market. However, high production costs
due to the use of expensive deposition techniques and stability limitations as a result
of using reactive metal as cathodes or unstable active materials highlight the need for
novel device architecture concepts.
This project proposes the simulation, design, development and characterization of
novel hybrid organic light emitting diodes (HyOLEDs) based on a combination of
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organic semiconductors and inorganic oxides (either evaporated metal or soluble
molecular oxides), p-type or n-type for anode and cathode interface modification,
respectively. Metal oxides combine unique properties such as high transparency, large
electrical conductivity and mobility, controlled morphology, and the possibility of
deposition on large areas with low-cost techniques.
Moreover, with the suitable selection/modification of materials and by controlling
their deposition conditions, we anticipate the development of HyOLEDs with
emission in the three basic colours and with improved operational characteristics like
efficiency and stability. Additionally, from a design point of view and by using
theoretical simulation models, the optimum combination of layer thicknesses will be
calculated for maximum device efficiency.
The proposed devices exhibit the advantage of having independent control of both the
emitting layer and the inorganic charge injection and transport layers in order to
optimize device characteristics.
Keywords: Hybrid OLEDs, metal oxide, molecular oxide, interface modification, low
power consumption.
B.2.5. Investigation of organic coatings durability on concrete reinforcement
corrosion protection with synergistic influence of corrosion inhibitors
A. Routoulas
Abstract
Reinforcement corrosion is an electrochemical action that takes place under certain
conditions. If water, chlorides and carbon dioxide cannot penetrate the interior of
concrete, then no fear exists for the reinforcement corrosion. Concrete however, as all
mortars, is a porous material. The use of organic coatings on the surface of concrete in
thickness of micrometers can impede the entry of these substances in the concrete
pores. The most common method of inhibition of these substances is the utilization of
organic coatings. On the other hand concrete exchanges moisture with the atmosphere
and the organic coatings should allow the penetration of water vapors. In general,
organic coatings applied on concrete should have small permeability in water,
increased permeability in water vapors, good adhesion in concrete surface even when
the surface of concrete is moist, resistance in concrete alkalinity and small
permeability in carbon dioxide, sulphur dioxide and oxygen.
In the proposed research project, the protection that offer organic coatings in
reinforced mortar specimens is studied, when applied on their surface in combination
with hydrophobic means. Moreover, the combined use of the above coatings with
corrosion inhibitors and their overall effectiveness against corrosion are investigated.
The project consists of the following work packages:
1. Bibliography – Data - Materials
2. Manufacture of specimens – Measurements of exposure in accelerated corrosion
3. Manufacture of specimens with corrosion inhibitors – Exposure – Accelerated
corrosion measurements
4. Manufacture of specimens for long-term corrosion measurements
5. Exposure of specimens to radiation
6. Exposure of specimens to laboratory corrosive environments for long-term
measurements
7. Determination of water- and vapor-permeability of organic coatings
8. Collection and process of results.
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The proposed experimental investigation of the protection offered by organic coatings
combined with hydrophobic materials on the surface of reinforced concrete is
expected to supplement and to extend modern knowledge in the object.
Keywords: corrosion inhibitors concrete reinforcement protection specimens organic
coatings
B.2.6.Designing and developing a system for the analysis of learners behaviour
in a Web-Based learning environment
Y. Psaromiligkos
Abstract
Nowadays, thousands of lessons are delivered through the web by utilizing some
Learning Management System (LMS) such as Moodle, Blackboard, WebCT, IBM
Lotus, etc. This phenomenon is expected to be escalated the following years by means
of the continuous increase in demand for life long learning. In such a learning model
learners, educators and educational organizations need smarter tools to face the
problem of continuous feedback of the educational process in order to offer a learning
environment capable to increase the learning effectiveness of the new mode of
learning as well as the efficient organization of the institutional resources. Although
LMSs can hold large volumes of rich data they provide a limited set of reporting
features, they don’t support data mining techniques and therefore it is very difficult
for an educator to extract useful learning patterns. Moreover, the current data mining
tools both commercial and open source are complex systems, they haven’t been
designed for educational purposes and therefore they are difficult to be used by nonexperts in this specific area. In this project, we will conduct an extended investigation
in the educational data mining research field aiming to design and develop an
innovative system based on web technology for mining educational data from LMSs.
The underlying system will provide an integrated functionality for tracing and
assessment of the learners' behavior using data come from LMSs. The system will be
evaluated in a real educational environment and it will interoperate with LMSs both
commercial (ΙΒΜ Lotus, Saba) and open source (Moodle).
B.2.7. The effect of virtual community in the economic, social and political
environment of traditional society
P. Kyriazopoulos
Abstract
Background: It is obvious that our society is affected in a manner very different
from previous generations. The main narration of life is no longer provided by school,
church or the family but by modern digital technology.
Aims: The aim of this study is to examine the effects on our society of the barrage of
information received from virtual on-line communities, related to the economy,
society and the governance of countries, creating new conditions for shaping views.
Our research and study focuses on the question of the influence exerted by various
forums on the On-line Society, together with the accompanying legal, social and
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ethical implications, which become central to the wider issues of sociology,
economics and political science.
Work packages: The program consists of the following work packages: Creation of
an IP control program, creation of a programme to code the questionnaire
automatically in Excel, creation of a questionnaire to conduct qualitative research,
conduct of qualitative research with a 50 depth interview, qualitative research data
processing using the program Nvivo 8, creation of a questionnaire for conducting
quantitative research, conduct of preliminary quantitative survey of 5% of the sample
or 1209 questionnaires and statistical analysis of sample, corrective actions to finalize
the questionnaire, conduct of primary research with 24,181 questionnaires, check of
answered questionnaires and statistical processing thereof, statistical analysis findings, writing of theoretical approach, writing of final report, publications
Expected results: Sociologists and psychologists will be better able to understand
the power exercised by virtual communities on real communities, and how this
happens in EU countries, USA and Canada.
The influence of virtual forums on the On-line Society, along with their legal, social
and ethical implications, become an issue of special attention and study and acquire
central importance in wider issues of web science.
Keywords: Virtual online communities, economic environment, interactive
communication
B.2.8. Information System for Sustainable Development [ISSD]
K. Dimakos
Abstract
Fertilizer and water management in Mediterranean countries in vegetable production
under protected cultivation are mainly based on experience. In most cases extremely
high fertilizers and water inputs are recommended and used, because of the high
production and the low costs of the water and fertilizers as compared to the financial
return from the product. In intensive vegetable production it is of critical importance
to achieve optimal fertiliser use. Too little leads to sub-optimal production and low
quality of the produce. However, excessive creates pollution of soils and groundwater.
Fertilizer dose should be planned and monitored. Monitoring of the optimal use of
fertilizer is possible by soil analysis. The basis for the planned fertilizer dose is the
model of the soil and plant reaction. Such a fertilization model has been developed in
Holland by Applied Plant Research-Division Glasshouse Horticulture since 1970. The
model is based on soil analysis by means of a water extraction, the so-called 1:2
volume extract aand the technique has been constantly evolving since then. The
model will be adapted to the Greek situation, taking into account differences in
climate, crops, soil types water quality and etc. The proposed research model (Soil
Fertilization Model, SFM) will be supported by the design and development of an
Information System for Sustainable Development (ISSD) for optimal fertilization on
soil grown greenhouse vegetables. The ISSD will provide an integrated environment
of implementing the model of sustainable soil fertilization:
• Interface with the model.
• Automated measurements, audit results.
• Optimization
• Flexibility
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The use of such innovative models in Greece is lacking particularly with the use of
information technology and communications. It will provide a very sophisticated tool
for addressing fertilization problems and developing ways of identifying optimal and
sustainable levels of vegetable production. Agricultural laboratories, both public and
private, extension services, producers, grower associations and other end users, will
be trained to use the proposed soil analysis technique and the fertigation model.
Therefore we will be able to: a) preserve and enhance soil and irrigation water quality
b) nminimize pollution of soil, water and air c) secure a sustainable production of
healthy, high quality crops d) promote conservation of natural resources.
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