ΔΗΜΗΤΡΗΣ ΤΣΕΛΕΣ | University of West Attica / Πανεπιστήμιο Δυτικής Αττικής (original) (raw)
Papers by ΔΗΜΗΤΡΗΣ ΤΣΕΛΕΣ
The prediction of meteorological parameters at a meteorological station is an interesting and ope... more The prediction of meteorological parameters at a meteorological station is an interesting and open problem. A firstorder linear dynamic model GM(1,1) is the main component of the grey system theory. The grey model requires only a few previous data points in order to make a real-time forecast. In this paper, we consider the daily average ambient temperature as a time series and the grey model GM(1,1) applied to local prediction (short-term prediction) of the temperature. In the same case study we use a fuzzy predictive model for global prediction. We conclude the paper with a comparison between local and global prediction schemes.
European Journal of Education Studies, 2022
The main goal of this survey is to explore lifelong learning in the third age in the island commu... more The main goal of this survey is to explore lifelong learning in the third age in the island community of Syros in the hope that the findings will provide data that may be useful in creating educational programme structures. Lifelong learning taking place with a group of senior citizens at the KAPI in the Municipality of Syros-Ermoupoli will be explored, along with the potential of implementing comprehensive active learning programmes specific to the third age. The topics examined include the idiosyncrasy of the KAPI members, their needs for active ageing, their expectations and motivations, the objects of knowledge they seek and the limitations they set. The principal findings showed that Syros is a fertile field for creating pilot structures for informal education in the third age. The members of the Syros KAPI hope to see such programmes launch with less reticence than expected, but on condition that the present hierarchy of family and social priorities is not radically upset. Th...
2015 IEEE International Conference on Fuzzy Systems (FUZZ-IEEE), 2015
This paper presents a Fuzzy-PID controller for maximum power point tracking (MPPT) of photovoltai... more This paper presents a Fuzzy-PID controller for maximum power point tracking (MPPT) of photovoltaic (PV) systems. A DC/DC buck converter to regulate the output power of the photovoltaic system is considered. The Fuzzy-PID scheme operates on MPP and improves the performance of solar energy conversion efficiency. The offline optimization algorithm of Big Bang - Big Crunch (BB-BC) is applied on the parameters of the proposed controller and upgrades the overall performance of the controller. The prime contribution of this study is a simple and effective solution for MPPT. The optimized fuzzy-PID controller is compared with a fuzzy-PID controller set up by the trial and error method in order to highlight the contribution of the offline algorithm in the overall performance of the system. The tuned controller is also compared to the conventional perturbation and observation (P&O) method, with a Fuzzy-PID optimized by Particle Swarm Optimization algorithm (PSO).
European Journal of Education Studies, Jan 8, 2022
The main goal of this survey is to explore lifelong learning in the third age in the island commu... more The main goal of this survey is to explore lifelong learning in the third age in the island community of Syros in the hope that the findings will provide data that may be useful in creating educational programme structures. Lifelong learning taking place with a group of senior citizens at the KAPI ii in the Municipality of Syros-Ermoupoli will be explored, along with the potential of implementing comprehensive active learning programmes specific to the third age. The topics examined include the idiosyncrasy of the KAPI members, their needs for active ageing, their expectations and motivations, the objects of knowledge they seek and the limitations they set. The principal findings showed that Syros is a fertile field for creating pilot structures for informal education in the third age. The members of the Syros KAPI hope to see such programmes launch with less reticence than expected, but on condition that the present hierarchy of family and social priorities is not radically upset. The elderly are open to the idea of participating in learning programmes, they select specific objects of knowledge and desire to channel the skills they acquire to the local community, which is open to volunteerism. It is noteworthy that in relation to the open-ended questions regarding learning objects, the KAPI members took the initiative to propose cultural education programmes as part of their training. They also believe that the non-formal learning will improve their social image and health and will allow them to become more functional members of the local community.
HighTech and innovation journal, Mar 1, 2022
Hotels are forms of businesses connected to the entire system of production and distribution of t... more Hotels are forms of businesses connected to the entire system of production and distribution of tourist products. Essentially, they provide hospitality goods and services to travelers, individuals with different profiles and interests, and thus play a very important role in the tourism sector. Therefore, the purpose of the article is to point out the theoretical approach of innovation in the context of its utilization in hotels for individuals with disabilities. We have reviewed the existing theoretical approaches to innovation and then analysed their applicability in the tourism sector. Based on the findings, we developed theoretical approaches, such as the coupling theory and the innovation diffusion theory, that can be applied to the target sectors and provide valuable insights to the relevant actors. Research shows that innovation, whether it concerns technological applications or processes, affects the enrichment of hotel services provided for people with disabilities and influences the technical-functional and organizational processes of hospitality. On this basis, innovation is a key factor of growth for any hotel, as it increases its competitiveness and sustainability through the utilization of the potential provided by the use of new innovative technological applications or processes for people with disabilities.
International journal of computer applications, Mar 24, 2018
Stepper motors have already shown their advantages of use in applications where precision movemen... more Stepper motors have already shown their advantages of use in applications where precision movements and accurate control are required. One of the most commonly used type of controller that was used to control stepper motors is the classical PID controller because of its easily programming characteristics. In this paper such a conjunction is going to be presented and as well as all the results of a given example of application.
International journal of computer applications, Oct 17, 2017
Nowadays, because of the current conditions in our country and globally, in general buildings sec... more Nowadays, because of the current conditions in our country and globally, in general buildings security and all installations is primary concern for all of us. Primary goal is also energy save, to which there has been given a lot of importance by industry, and not only, as a result of the financial crisis, but also for the protection of the environment. Energy save is an important part of research and implementation sector, which includes methods, specialized systems, informations systems, autonomous control systems, by which the consumed energy can be reduced. In this paper, the design and implementation of united alarm systems will be presented along with a light control system. The main idea is for these two systems to be united and installed in an imaginary company whose goal is energy save with least possible interventions. In this part there will be given more emphasis given on the simulation of the PLC program for educational reasons and better presentation of its function. Subsequently, the model's implementation process will be analyzed along with her results, which is going to give us the trigger to discuss the advantages and the disadvantages of the system. As a conclusion, possible future optimizations will be proposed as well as the possibility of the implementation in already installed systems. Aim of this thesis is to show the advantages of the systems interconnection, same time with systems ease of use as there
International journal of computer applications, Mar 24, 2018
Literally, the so-called three terms controller PID, has been extensively used in industrial appl... more Literally, the so-called three terms controller PID, has been extensively used in industrial applications for programming moving systems behavior. Given the fact that it is still in use, this paper will emphasize in the cooperation between such a controller and a very commonly used actuator, the servomotors. There is an introductory part which explains both parties operational characteristics and at the end a specific example of their use is illustrated.
: Electrocardiography (ECG) is a data source that can contain valuable knowledge for the body fun... more : Electrocardiography (ECG) is a data source that can contain valuable knowledge for the body function and can reveal information for several diseases. It has been used across the years to diagnose cardiovascular diseases and to prognose upcoming abnormalities. Along with the evolution of data processing methods, data mining algorithms in ECG data have been used in the last three decades. This work investigates this area of research with the aim to realize the advances through time and present current research trend. The area of data mining is first presented and a brief introduction of the main algorithms is given. The focus of this work is placed on the different frameworks and models used in the area, namely signal processing approaches, morphological based processing and data mining. Literature shows a trend towards real-time diagnosis based on portable devices. Technology evolution provides portable computational power that can be used for real-time data processing and a number of research studies in this topic are presented. This work concludes with some remarks in this area and its future evolvement.
2019 4th South-East Europe Design Automation, Computer Engineering, Computer Networks and Social Media Conference (SEEDA-CECNSM)
This article presents the theoretical basis and certain results of an experiment on creating a le... more This article presents the theoretical basis and certain results of an experiment on creating a learning community and at the same time a community of practice among teachers of vehicle mechanics in VET, built around a school laboratory. The conceptual tool of the distinction between tacit and explicit knowledge has been used as a criterion for the codification of the curriculum, during the external didactic transformation, in order to adapt professional knowledge to the educational environment. For the internal transformation, the conceptual tool of socially framed knowledge is used to design actions for the systematic dissemination of knowledge created by teachers among themselves.
European Journal of Education Studies, 2021
In recent years, technology has been growing rapidly. The impact that Information and Communicati... more In recent years, technology has been growing rapidly. The impact that Information and Communication Technology (ICT) and associated teaching tools have on the learning process is already significant, and this is expected to grow further in the future. Digital Storytelling (DST) is a combination of interaction and learning at the same time and it could prove to be an excellent teaching method at the disposal of the educator. The present study is an attempt to examine the impact of the method in adult education, providing that the learners are the creators of digital stories. In addition, the current research is an attempt to examine the relationship between learners’ Working Memory and the impact of DST on their learning performance. The research has been conducted in a public vocational training institute. The findings revealed that DST is an effective learning tool in adult education that can improve learners’ performance. In addition, the findings suggest that the method is more e...
MATEC Web of Conferences, 2017
In this paper a comparative study of the classical control methods for the testing of a mathemati... more In this paper a comparative study of the classical control methods for the testing of a mathematical model, which controls six actuators of a six degrees of freedom robotic arm with a single controller, is illustrated, aiming to the constructive simplification of the system. In more detail, a mathematical model of the system is designed which simulates all mechanical parts, including 5-way directional pneumatic valve, the pneumatic actuators/pistons and the mathematical model of the controller. The purpose of the above is the tuning of a Single Input, Multiple Output (SIMO) controller which will direct the motion of the six pneumatic pistons. The thorough analysis of the implementation of the pneumatic system in Matlab/Simulink environment is followed by experimentation and results using Proportional (P), Proportional-Integral (PI), Proportional-Derivative (PD) and Proportional-Integral-Derivative (PID) controllers. The simulation results show the advantages of the above classical control methods on the robotic human arm which imitating human motion and made by a well-known company in the field of pneumatic automation.
International Journal of Computer Applications, 2018
In light of the rapid rates of technology development in our times, there has been a continuous e... more In light of the rapid rates of technology development in our times, there has been a continuous effort to introduce everyday technological advances in order to cover better and easier human needs. Especially in the sector of research and applications, the need for simulation programs was seen as offering security to errors, reduce costs and they are accessible to use by professionals and higher education students. This thesis will present the study of control methods's application for pneumatic system in simulation environment. In addition, it will analyze and describe the operation of the pneumatic system and all the testing methods used in it. The object of the study, which comes with MSc, since it deals with modern automation technology applications, will try to cover questions such as whether these control methods are appropriate and effective for the pneumatic system which is studied, and especially how effective it is the use of a Lookup table to Implement Fuzzy Controller (Fuzzy) with Proportional-Integral-Derivative Controller (PID). For the use of this Lookup table in the pneumatic system of the present study, results have not been extracted to date. These two events are the main purpose of this thesis, in an attempt to perform control of the system on the applications above. The main part of the study will explain the design of the system as well as the type of controllers and the Lookup table. The way of connecting and operating among the pneumatic system, the control methods and the Lookup table, in the simulation environment will be presented in detail, while all this will emerge the conclusions of use specific control methods, the advantages and disadvantages will be discussed and both will be proposed optimizations to further expanding benefits of their operation. As a possible result of using these methods will occur to achieve the optimal and efficient control of the system.
NATO Science for Peace and Security Series B: Physics and Biophysics, 2016
This paper outlines the use of radiation sensors and nanosensory systems in medical imaging modal... more This paper outlines the use of radiation sensors and nanosensory systems in medical imaging modalities emphasising on the digital ones. Sensors have been widely used in various disciplines e.g. optoelectronics and non-distractive testing. Recently novel sensors such as nanophosphors and Nanocrystal Quantum Dots (QDs) has attracted attention due to their unique electronic properties. The related research investigates new phosphors and nanophosphors for modern systems in combination with different optical sensors, and yields to novel computational Monte Carlo codes targeted to the applicability of phosphor and nanophosphor sensory material in medical imaging.
2015 IEEE International Conference on Electronics, Circuits, and Systems (ICECS), 2015
Pneumatic positioning systems have always been attractive for robotics and automation application... more Pneumatic positioning systems have always been attractive for robotics and automation applications due to their high power-to-weight ratio and low cost. On the other hand, achieving fast and accurate control of their position have been known as a complex control problem and in fact it has not been solved yet in a 100% percentage of position accuracy and repeatability. A smart way to implement the three term classical control approach (PID) to such a system is presented in this paper. The I-Term was selected to be "switched" on and off, dynamically and automatically, according to the system control requirements. Although the task sounds challenging for an engineer, the primary aim of this research project is to design and implement an advanced electrical board which will be the embedded interface between an engineer and a pneumatic positioning plant. The interface board will include a microcontroller and all necessary peripheral circuitry as well as the software environment where the control code will be composed. Low cost, easy to pick-up from a local store electrical equipment will be used that can operate under non up to date computer connection thus minimizing the cost of the whole system further. Reliability, low cost and ease of use of the board are critical design factors. The feedback data of the pneumatic system performance will be monitored in a computer monitor via the board's data acquisition operation in real time.
Concepts, Methodologies, Tools, and Applications
The tourism sector has changed rapidly since the dawn of the internet revolution in the late 1990... more The tourism sector has changed rapidly since the dawn of the internet revolution in the late 1990s. At the same time, the digital divide has disadvantaged many in developing economies as well as the disabled population. It is interesting to observe, however, that the emerging computer technologies, especially mobile computing, are offering significant opportunities to this disadvantaged population. This chapter discusses these opportunities that increase the participation in and reaping of benefits from tourism.
International Journal of e-Collaboration
During the pandemic outbreak of COVID-19 in Greece that coincided with the spring semester of the... more During the pandemic outbreak of COVID-19 in Greece that coincided with the spring semester of the year 2020, conventional face-to-face lessons presented a threat to public health. As a result, house confinement measures were taken. Universities, due to their offering either directly or via their lifelong education centers, were partially prepared to offer distant learning solutions for their students during the pandemic. The lessons, in the general case, were delivered in an ad hoc manner utilizing teachers' personal experiences and preferences creating some pressure on existing infrastructures. In the case of the Department of Industrial Design & Production Engineering at the University of West Attica, things were more organized than in the general case: there was a, more or less, uniform practice of preferring synchronous lessons and some monitoring was planned in order to evaluate the application for future reference. While data collected in the process are still going throug...
International journal of computer applications, Mar 24, 2018
A sensor is a device, module, or subsystem whose purpose is to observe the events or changes in i... more A sensor is a device, module, or subsystem whose purpose is to observe the events or changes in its environment and send the information to other electronics, frequently a computer processor [1]. There are plenty of sensor types that are used in industry for various purposes. One type of the sensors is position sensors which are divided into Linear and Rotational sensors. This report is dedicated to the rotational sensors by specifying several different types of them. These types are Incremental rotary encoders, Absolute encoders and Inductive rotary sensors. Incremental rotary encoders measure or record length, angles, thickness and speed. They are often combined with counting, visualizing and control systems in order to achieve programmed positions, preset step shifts or to display measured values. Absolute rotary encoders are ideal to control motions and to determine position on industrial controls of operating robots and machines. Inductive rotary sensors are contactless sensors used to measure position, rotation, or speed. They work using transformer principles where current carrying coils induce a current in a metal disk.
The prediction of meteorological parameters at a meteorological station is an interesting and ope... more The prediction of meteorological parameters at a meteorological station is an interesting and open problem. A firstorder linear dynamic model GM(1,1) is the main component of the grey system theory. The grey model requires only a few previous data points in order to make a real-time forecast. In this paper, we consider the daily average ambient temperature as a time series and the grey model GM(1,1) applied to local prediction (short-term prediction) of the temperature. In the same case study we use a fuzzy predictive model for global prediction. We conclude the paper with a comparison between local and global prediction schemes.
European Journal of Education Studies, 2022
The main goal of this survey is to explore lifelong learning in the third age in the island commu... more The main goal of this survey is to explore lifelong learning in the third age in the island community of Syros in the hope that the findings will provide data that may be useful in creating educational programme structures. Lifelong learning taking place with a group of senior citizens at the KAPI in the Municipality of Syros-Ermoupoli will be explored, along with the potential of implementing comprehensive active learning programmes specific to the third age. The topics examined include the idiosyncrasy of the KAPI members, their needs for active ageing, their expectations and motivations, the objects of knowledge they seek and the limitations they set. The principal findings showed that Syros is a fertile field for creating pilot structures for informal education in the third age. The members of the Syros KAPI hope to see such programmes launch with less reticence than expected, but on condition that the present hierarchy of family and social priorities is not radically upset. Th...
2015 IEEE International Conference on Fuzzy Systems (FUZZ-IEEE), 2015
This paper presents a Fuzzy-PID controller for maximum power point tracking (MPPT) of photovoltai... more This paper presents a Fuzzy-PID controller for maximum power point tracking (MPPT) of photovoltaic (PV) systems. A DC/DC buck converter to regulate the output power of the photovoltaic system is considered. The Fuzzy-PID scheme operates on MPP and improves the performance of solar energy conversion efficiency. The offline optimization algorithm of Big Bang - Big Crunch (BB-BC) is applied on the parameters of the proposed controller and upgrades the overall performance of the controller. The prime contribution of this study is a simple and effective solution for MPPT. The optimized fuzzy-PID controller is compared with a fuzzy-PID controller set up by the trial and error method in order to highlight the contribution of the offline algorithm in the overall performance of the system. The tuned controller is also compared to the conventional perturbation and observation (P&O) method, with a Fuzzy-PID optimized by Particle Swarm Optimization algorithm (PSO).
European Journal of Education Studies, Jan 8, 2022
The main goal of this survey is to explore lifelong learning in the third age in the island commu... more The main goal of this survey is to explore lifelong learning in the third age in the island community of Syros in the hope that the findings will provide data that may be useful in creating educational programme structures. Lifelong learning taking place with a group of senior citizens at the KAPI ii in the Municipality of Syros-Ermoupoli will be explored, along with the potential of implementing comprehensive active learning programmes specific to the third age. The topics examined include the idiosyncrasy of the KAPI members, their needs for active ageing, their expectations and motivations, the objects of knowledge they seek and the limitations they set. The principal findings showed that Syros is a fertile field for creating pilot structures for informal education in the third age. The members of the Syros KAPI hope to see such programmes launch with less reticence than expected, but on condition that the present hierarchy of family and social priorities is not radically upset. The elderly are open to the idea of participating in learning programmes, they select specific objects of knowledge and desire to channel the skills they acquire to the local community, which is open to volunteerism. It is noteworthy that in relation to the open-ended questions regarding learning objects, the KAPI members took the initiative to propose cultural education programmes as part of their training. They also believe that the non-formal learning will improve their social image and health and will allow them to become more functional members of the local community.
HighTech and innovation journal, Mar 1, 2022
Hotels are forms of businesses connected to the entire system of production and distribution of t... more Hotels are forms of businesses connected to the entire system of production and distribution of tourist products. Essentially, they provide hospitality goods and services to travelers, individuals with different profiles and interests, and thus play a very important role in the tourism sector. Therefore, the purpose of the article is to point out the theoretical approach of innovation in the context of its utilization in hotels for individuals with disabilities. We have reviewed the existing theoretical approaches to innovation and then analysed their applicability in the tourism sector. Based on the findings, we developed theoretical approaches, such as the coupling theory and the innovation diffusion theory, that can be applied to the target sectors and provide valuable insights to the relevant actors. Research shows that innovation, whether it concerns technological applications or processes, affects the enrichment of hotel services provided for people with disabilities and influences the technical-functional and organizational processes of hospitality. On this basis, innovation is a key factor of growth for any hotel, as it increases its competitiveness and sustainability through the utilization of the potential provided by the use of new innovative technological applications or processes for people with disabilities.
International journal of computer applications, Mar 24, 2018
Stepper motors have already shown their advantages of use in applications where precision movemen... more Stepper motors have already shown their advantages of use in applications where precision movements and accurate control are required. One of the most commonly used type of controller that was used to control stepper motors is the classical PID controller because of its easily programming characteristics. In this paper such a conjunction is going to be presented and as well as all the results of a given example of application.
International journal of computer applications, Oct 17, 2017
Nowadays, because of the current conditions in our country and globally, in general buildings sec... more Nowadays, because of the current conditions in our country and globally, in general buildings security and all installations is primary concern for all of us. Primary goal is also energy save, to which there has been given a lot of importance by industry, and not only, as a result of the financial crisis, but also for the protection of the environment. Energy save is an important part of research and implementation sector, which includes methods, specialized systems, informations systems, autonomous control systems, by which the consumed energy can be reduced. In this paper, the design and implementation of united alarm systems will be presented along with a light control system. The main idea is for these two systems to be united and installed in an imaginary company whose goal is energy save with least possible interventions. In this part there will be given more emphasis given on the simulation of the PLC program for educational reasons and better presentation of its function. Subsequently, the model's implementation process will be analyzed along with her results, which is going to give us the trigger to discuss the advantages and the disadvantages of the system. As a conclusion, possible future optimizations will be proposed as well as the possibility of the implementation in already installed systems. Aim of this thesis is to show the advantages of the systems interconnection, same time with systems ease of use as there
International journal of computer applications, Mar 24, 2018
Literally, the so-called three terms controller PID, has been extensively used in industrial appl... more Literally, the so-called three terms controller PID, has been extensively used in industrial applications for programming moving systems behavior. Given the fact that it is still in use, this paper will emphasize in the cooperation between such a controller and a very commonly used actuator, the servomotors. There is an introductory part which explains both parties operational characteristics and at the end a specific example of their use is illustrated.
: Electrocardiography (ECG) is a data source that can contain valuable knowledge for the body fun... more : Electrocardiography (ECG) is a data source that can contain valuable knowledge for the body function and can reveal information for several diseases. It has been used across the years to diagnose cardiovascular diseases and to prognose upcoming abnormalities. Along with the evolution of data processing methods, data mining algorithms in ECG data have been used in the last three decades. This work investigates this area of research with the aim to realize the advances through time and present current research trend. The area of data mining is first presented and a brief introduction of the main algorithms is given. The focus of this work is placed on the different frameworks and models used in the area, namely signal processing approaches, morphological based processing and data mining. Literature shows a trend towards real-time diagnosis based on portable devices. Technology evolution provides portable computational power that can be used for real-time data processing and a number of research studies in this topic are presented. This work concludes with some remarks in this area and its future evolvement.
2019 4th South-East Europe Design Automation, Computer Engineering, Computer Networks and Social Media Conference (SEEDA-CECNSM)
This article presents the theoretical basis and certain results of an experiment on creating a le... more This article presents the theoretical basis and certain results of an experiment on creating a learning community and at the same time a community of practice among teachers of vehicle mechanics in VET, built around a school laboratory. The conceptual tool of the distinction between tacit and explicit knowledge has been used as a criterion for the codification of the curriculum, during the external didactic transformation, in order to adapt professional knowledge to the educational environment. For the internal transformation, the conceptual tool of socially framed knowledge is used to design actions for the systematic dissemination of knowledge created by teachers among themselves.
European Journal of Education Studies, 2021
In recent years, technology has been growing rapidly. The impact that Information and Communicati... more In recent years, technology has been growing rapidly. The impact that Information and Communication Technology (ICT) and associated teaching tools have on the learning process is already significant, and this is expected to grow further in the future. Digital Storytelling (DST) is a combination of interaction and learning at the same time and it could prove to be an excellent teaching method at the disposal of the educator. The present study is an attempt to examine the impact of the method in adult education, providing that the learners are the creators of digital stories. In addition, the current research is an attempt to examine the relationship between learners’ Working Memory and the impact of DST on their learning performance. The research has been conducted in a public vocational training institute. The findings revealed that DST is an effective learning tool in adult education that can improve learners’ performance. In addition, the findings suggest that the method is more e...
MATEC Web of Conferences, 2017
In this paper a comparative study of the classical control methods for the testing of a mathemati... more In this paper a comparative study of the classical control methods for the testing of a mathematical model, which controls six actuators of a six degrees of freedom robotic arm with a single controller, is illustrated, aiming to the constructive simplification of the system. In more detail, a mathematical model of the system is designed which simulates all mechanical parts, including 5-way directional pneumatic valve, the pneumatic actuators/pistons and the mathematical model of the controller. The purpose of the above is the tuning of a Single Input, Multiple Output (SIMO) controller which will direct the motion of the six pneumatic pistons. The thorough analysis of the implementation of the pneumatic system in Matlab/Simulink environment is followed by experimentation and results using Proportional (P), Proportional-Integral (PI), Proportional-Derivative (PD) and Proportional-Integral-Derivative (PID) controllers. The simulation results show the advantages of the above classical control methods on the robotic human arm which imitating human motion and made by a well-known company in the field of pneumatic automation.
International Journal of Computer Applications, 2018
In light of the rapid rates of technology development in our times, there has been a continuous e... more In light of the rapid rates of technology development in our times, there has been a continuous effort to introduce everyday technological advances in order to cover better and easier human needs. Especially in the sector of research and applications, the need for simulation programs was seen as offering security to errors, reduce costs and they are accessible to use by professionals and higher education students. This thesis will present the study of control methods's application for pneumatic system in simulation environment. In addition, it will analyze and describe the operation of the pneumatic system and all the testing methods used in it. The object of the study, which comes with MSc, since it deals with modern automation technology applications, will try to cover questions such as whether these control methods are appropriate and effective for the pneumatic system which is studied, and especially how effective it is the use of a Lookup table to Implement Fuzzy Controller (Fuzzy) with Proportional-Integral-Derivative Controller (PID). For the use of this Lookup table in the pneumatic system of the present study, results have not been extracted to date. These two events are the main purpose of this thesis, in an attempt to perform control of the system on the applications above. The main part of the study will explain the design of the system as well as the type of controllers and the Lookup table. The way of connecting and operating among the pneumatic system, the control methods and the Lookup table, in the simulation environment will be presented in detail, while all this will emerge the conclusions of use specific control methods, the advantages and disadvantages will be discussed and both will be proposed optimizations to further expanding benefits of their operation. As a possible result of using these methods will occur to achieve the optimal and efficient control of the system.
NATO Science for Peace and Security Series B: Physics and Biophysics, 2016
This paper outlines the use of radiation sensors and nanosensory systems in medical imaging modal... more This paper outlines the use of radiation sensors and nanosensory systems in medical imaging modalities emphasising on the digital ones. Sensors have been widely used in various disciplines e.g. optoelectronics and non-distractive testing. Recently novel sensors such as nanophosphors and Nanocrystal Quantum Dots (QDs) has attracted attention due to their unique electronic properties. The related research investigates new phosphors and nanophosphors for modern systems in combination with different optical sensors, and yields to novel computational Monte Carlo codes targeted to the applicability of phosphor and nanophosphor sensory material in medical imaging.
2015 IEEE International Conference on Electronics, Circuits, and Systems (ICECS), 2015
Pneumatic positioning systems have always been attractive for robotics and automation application... more Pneumatic positioning systems have always been attractive for robotics and automation applications due to their high power-to-weight ratio and low cost. On the other hand, achieving fast and accurate control of their position have been known as a complex control problem and in fact it has not been solved yet in a 100% percentage of position accuracy and repeatability. A smart way to implement the three term classical control approach (PID) to such a system is presented in this paper. The I-Term was selected to be "switched" on and off, dynamically and automatically, according to the system control requirements. Although the task sounds challenging for an engineer, the primary aim of this research project is to design and implement an advanced electrical board which will be the embedded interface between an engineer and a pneumatic positioning plant. The interface board will include a microcontroller and all necessary peripheral circuitry as well as the software environment where the control code will be composed. Low cost, easy to pick-up from a local store electrical equipment will be used that can operate under non up to date computer connection thus minimizing the cost of the whole system further. Reliability, low cost and ease of use of the board are critical design factors. The feedback data of the pneumatic system performance will be monitored in a computer monitor via the board's data acquisition operation in real time.
Concepts, Methodologies, Tools, and Applications
The tourism sector has changed rapidly since the dawn of the internet revolution in the late 1990... more The tourism sector has changed rapidly since the dawn of the internet revolution in the late 1990s. At the same time, the digital divide has disadvantaged many in developing economies as well as the disabled population. It is interesting to observe, however, that the emerging computer technologies, especially mobile computing, are offering significant opportunities to this disadvantaged population. This chapter discusses these opportunities that increase the participation in and reaping of benefits from tourism.
International Journal of e-Collaboration
During the pandemic outbreak of COVID-19 in Greece that coincided with the spring semester of the... more During the pandemic outbreak of COVID-19 in Greece that coincided with the spring semester of the year 2020, conventional face-to-face lessons presented a threat to public health. As a result, house confinement measures were taken. Universities, due to their offering either directly or via their lifelong education centers, were partially prepared to offer distant learning solutions for their students during the pandemic. The lessons, in the general case, were delivered in an ad hoc manner utilizing teachers' personal experiences and preferences creating some pressure on existing infrastructures. In the case of the Department of Industrial Design & Production Engineering at the University of West Attica, things were more organized than in the general case: there was a, more or less, uniform practice of preferring synchronous lessons and some monitoring was planned in order to evaluate the application for future reference. While data collected in the process are still going throug...
International journal of computer applications, Mar 24, 2018
A sensor is a device, module, or subsystem whose purpose is to observe the events or changes in i... more A sensor is a device, module, or subsystem whose purpose is to observe the events or changes in its environment and send the information to other electronics, frequently a computer processor [1]. There are plenty of sensor types that are used in industry for various purposes. One type of the sensors is position sensors which are divided into Linear and Rotational sensors. This report is dedicated to the rotational sensors by specifying several different types of them. These types are Incremental rotary encoders, Absolute encoders and Inductive rotary sensors. Incremental rotary encoders measure or record length, angles, thickness and speed. They are often combined with counting, visualizing and control systems in order to achieve programmed positions, preset step shifts or to display measured values. Absolute rotary encoders are ideal to control motions and to determine position on industrial controls of operating robots and machines. Inductive rotary sensors are contactless sensors used to measure position, rotation, or speed. They work using transformer principles where current carrying coils induce a current in a metal disk.