- Entrepreneurship, Creativity, Item Resposne Theory, Emotions, Emotional intelligence, Industrial engineering and production planning and management, and 8 moreFashion design, Rapid Prototyping, Mass Customisation, Business, 3D printing, Additive Manufacturing, Additive Manufacturing and 3D printing, and 3d Printeredit
The introduction of an automated tool flow system in a FMS improves substantially the efficiency of the system and enables rationalisation reserves to be opened-up. In this paper we report on modelling for analysing the tool flow system... more
The introduction of an automated tool flow system in a FMS improves substantially the efficiency of the system and enables rationalisation reserves to be opened-up. In this paper we report on modelling for analysing the tool flow system requirements for an FMS; a simulation model written in FORTRAN programming language and a mathematical model based on the closed loop queuirig network theory, have been developed. The models can estimate machine tools utilization, requirements on storage capacity of the stations, the necessary characteristics of the tool transporting system and the rate of replacement of worn tools.
Research Interests:
As awareness on fashion’s impact on our world is growing, there are key leaders in the industry who are beginning to question the impacts of the model built on careless production and endless consumption. 3D Virtual Prototype, 3D... more
As awareness on fashion’s impact on our world is growing, there are key leaders in the industry who are beginning to question the impacts of the model built on careless production and endless consumption. 3D Virtual Prototype, 3D visualization, 3D Body Scanning and virtual try-on technology solving the proper-fit problem, while providing efficiency in its supply chain, can help the clothing sector meet green targets, without damaging the environment through wasteful manufacturing processes. Concepts of CSR and Collective actions on Sustainability are being explored within the apparel sector. Authors examine the challenges, the threats and the opportunities across the supply chain partners emerging to reduce the environmental footprint. A new fully integrated product development model is proposed, with 3D virtual simulation of design concepts on mannequins that represent the target market of the company with digital fit models based on accurate input size data.
Research Interests:
A method of sizing stand-alone photovoltaic systems regarding the reliability to satisfy the load demand, economy of components, and discharge depth exploited by the batteries is presented in this work. Solar radiation data simulated by... more
A method of sizing stand-alone photovoltaic systems regarding the reliability to satisfy the load demand, economy of components, and discharge depth exploited by the batteries is presented in this work. Solar radiation data simulated by an appropriate stochastic time series model, and not actual measurements, are used in the sizing procedure. This offers two distinct advantages: (a) sizing can be performed even for locations where no actual data exist, (b) the influence of the variation of the statistical parameters of solar radiation in sizing can be examined. The method has been applied and tested for several representative locations all over Greece for which monthly daily average values of solar radiation are given byELOT(Hellenic Organization of Standardization).
Research Interests:
In the last years, photovoltaic (PV) energy production is proved to be one of the most promising technologies of the renewable energy sources. By the end of year 2013, the cumulative PV installed capacity achieved 139 GW, whereas for 2014... more
In the last years, photovoltaic (PV) energy production is proved to be one of the most promising technologies of the renewable energy sources. By the end of year 2013, the cumulative PV installed capacity achieved 139 GW, whereas for 2014 the estimation is 185 GW. PV modules contain substances such as glass, aluminum and semiconductor materials that can be successfully recovered and reused, either in new PV modules or other products. Due to the fact that lifetime of PV modules is estimated to be around 25-35 years; current total PV waste is very small because most PV systems are still in service. However, in 10-15 years it is expected that there will be a critical part of the waste stream, as a large number of end-of-life modules will become available for recycling. Although there are numerous PV modules technologies, the two basic categories are 1) crystalline silicon PVs (monocrystalline or polycrystalline), and 2) thin film PVs (which include amorphous silicon PVs, cadmium tellur...
This paper aims to estimate the amount of waste materials for photovoltaic (PV) installations in Crete Island. Crete is the largest Greek island and constitutes the largest autonomous power system in Greece. The analysis includes the... more
This paper aims to estimate the amount of waste materials for photovoltaic (PV) installations in Crete Island. Crete is the largest Greek island and constitutes the largest autonomous power system in Greece. The analysis includes the impact of the basic components of a PV system: PV panels, PV mounting system, cables, and inverters. The results show that significant amounts of waste materials will be produced in the period 2030-2038. Moreover, this study generalizes the results for the entire Greek territory.
Research Interests:
Research Interests:
Research Interests:
Abstract—This work proposes a set of actions to assist redesign procedure in existing products of Electric and Electronic Equipment (EEE). The aim is to improve their environmental behavior after their withdrawal in the End-of-Life (EOL)... more
Abstract—This work proposes a set of actions to assist redesign procedure in existing products of Electric and Electronic Equipment (EEE). The aim is to improve their environmental behavior after their withdrawal in the End-of-Life (EOL) phase. In the beginning data collection takes place. Then follows selection and implementation of the optimal EOL Treatment Strategy (EOL_TS) and its results’ evaluation concerning the environment. In parallel, product design characteristics that can be altered are selected based on their significance for the environment in the EOL stage. All results from the previous stages are combined and possible redesign actions are formulated for further examination and afterwards configuration in the design stage. The applied method to perform these tasks is Lean Thinking (LT). At the end, results concerning the application of the proposed method on a distribution transformer are presented.
Research Interests: Lean Thinking and WEEE
Research Interests:
Twist drills are geometrically complex tools, which are used in industry for a variety of hole making processes. In the past, a number of researchers have adopted mathematical and experimental approaches for drilling simulation. The... more
Twist drills are geometrically complex tools, which are used in industry for a variety of hole making processes. In the past, a number of researchers have adopted mathematical and experimental approaches for drilling simulation. The present paper is based on the ground that the increasing use of modern CAD systems provides an excellent platform for the development of CAD-based tools for machining simulations and optimizations. The drilling tools are modeled using the API (Application Programming Interface) of a general purpose CAD system. The model is parameterized in order to achieve different twist drill geometries, depending on design and manufacturing parameters, while at the same time, different cutting conditions are used. Both the drilling tool and the cut work piece are represented as solid models. The simulation is based on virtual kinematics of solid models, which leads to successive penetrations and material removal of the drilling tool into the cutting piece. The final o...
Research Interests:
CNC Training has been a scope of interest for vocational training centres for a very long time. Training on CNC should follow similar developments in the CNC machines and in particular in their programming capabilities, automation they... more
CNC Training has been a scope of interest for vocational training centres for a very long time. Training on CNC should follow similar developments in the CNC machines and in particular in their programming capabilities, automation they offer and their technical capabilities. In addition CNC programming is becoming more and more automated through the use of CAD/CAM systems. This requires from the programmers to acquire CAD operation capabilities, on top of their CNC operation and programming knowledge. Therefore, CNC training is not only restricted to vocational training centres but also it is being taught within most of the technical universities. This paper presents the development of a Virtual Training Centre (VTC) to promote and reinforce Vocational Training in Computer Numerical Control (CNC) Machines.
Research Interests:
In the clothing industry, design, development and procurement teams have been affected more than any other industry and are constantly being under pressure to present more products with fewer resources in a shorter time. The diversity of... more
In the clothing industry, design, development and procurement teams have been affected more than any other industry and are constantly being under pressure to present more products with fewer resources in a shorter time. The diversity of garment designs created as new products is not found in any other industry and is almost independent of the size of the business. The proposed research is being applied to a Greek clothing manufacturing company with operations in two different countries and a portfolio of diverse brands and moves in two dimensions: The first dimension concerns the perfect transformation of the product design field into a field of action planning that can be supported by artificial intelligence, providing timely and valid information to the designer drawing information from a wider range of sources than today’s method. The second dimension of the research concerns the design and implementation of an intelligent and semi-autonomous decision support system for everyone involved in the sample room. This system utilizes various machine learning techniques in order to become a versatile, robust and useful “assistant”: multiple clustering and classification models are utilized for grouping and combining similar/relevant products, Computer Vision state-of-the-art algorithms are extracting meaningful attributes from images and, finally, a reinforcement learning system is used to evolve the existing models based on user’s preferences.
Research Interests:
Research Interests:
Research Interests:
Power generation from photovoltaic (PV) cells is a well-established and promising technology that takes full advantage of solar energy, which is a renewable energy source. Although numerous methods of PV recycling have been proposed... more
Power generation from photovoltaic (PV) cells is a well-established and promising technology that takes full advantage of solar energy, which is a renewable energy source. Although numerous methods of PV recycling have been proposed worldwide, Greece has not taken any serious corresponding action until now. Moreover, estimations expect that the overall quantity of c-Si PV waste in Europe will reach 3,500,000 tons until 2040 (Bio Intelligence Service, 2011) while in Greece, until 2038 the amount will be in the range of 264,000 tons (Katsigiannis et al., 2014). As a result, it is essential to propose a unified management of PV end-of-life (EOL) process, in order to achieve a successful recovery of materials such as silicon, aluminium, silver and glass. The scope of this paper is the simulation of an integrated c-Si PV recycling process with the use of CATIA software. The design of this recycling process is parametric, in order to allow the location and sizing configuration of each machine and installation type that can be used.
Research Interests:
As awareness on fashion’s impact on our world is growing, there are key leaders in the industry who are beginning to question the impacts of the model built on careless production and endless consumption. 3D Virtual Prototype, 3D... more
As awareness on fashion’s impact on our world is growing, there are key leaders in the industry who are beginning to question the impacts of the model built on careless production and endless consumption. 3D Virtual Prototype, 3D visualization, 3D Body Scanning and virtual try-on technology solving the proper-fit problem, while providing efficiency in its supply chain, can help the clothing sector meet green targets, without damaging the environment through wasteful manufacturing processes. Concepts of CSR and Collective actions on Sustainability are being explored within the apparel sector. Authors examine the challenges, the threats and the opportunities across the supply chain partners emerging to reduce the environmental footprint. A new fully integrated product development model is proposed, with 3D virtual simulation of design concepts on mannequins that represent the target market of the company with digital fit models based on accurate input size data.
Research Interests:
A method of sizing stand-alone photovoltaic systems regarding the reliability to satisfy the load demand, economy of components, and discharge depth exploited by the batteries is presented in this work. Solar radiation data simulated by... more
A method of sizing stand-alone photovoltaic systems regarding the reliability to satisfy the load demand, economy of components, and discharge depth exploited by the batteries is presented in this work. Solar radiation data simulated by an appropriate stochastic time series model, and not actual measurements, are used in the sizing procedure. This offers two distinct advantages: (a) sizing can be performed even for locations where no actual data exist, (b) the influence of the variation of the statistical parameters of solar radiation in sizing can be examined. The method has been applied and tested for several representative locations all over Greece for which monthly daily average values of solar radiation are given byELOT(Hellenic Organization of Standardization).
Research Interests:
In the last years, photovoltaic (PV) energy production is proved to be one of the most promising technologies of the renewable energy sources. By the end of year 2013, the cumulative PV installed capacity achieved 139 GW, whereas for 2014... more
In the last years, photovoltaic (PV) energy production is proved to be one of the most promising technologies of the renewable energy sources. By the end of year 2013, the cumulative PV installed capacity achieved 139 GW, whereas for 2014 the estimation is 185 GW. PV modules contain substances such as glass, aluminum and semiconductor materials that can be successfully recovered and reused, either in new PV modules or other products. Due to the fact that lifetime of PV modules is estimated to be around 25-35 years; current total PV waste is very small because most PV systems are still in service. However, in 10-15 years it is expected that there will be a critical part of the waste stream, as a large number of end-of-life modules will become available for recycling. Although there are numerous PV modules technologies, the two basic categories are 1) crystalline silicon PVs (monocrystalline or polycrystalline), and 2) thin film PVs (which include amorphous silicon PVs, cadmium tellur...
This paper aims to estimate the amount of waste materials for photovoltaic (PV) installations in Crete Island. Crete is the largest Greek island and constitutes the largest autonomous power system in Greece. The analysis includes the... more
This paper aims to estimate the amount of waste materials for photovoltaic (PV) installations in Crete Island. Crete is the largest Greek island and constitutes the largest autonomous power system in Greece. The analysis includes the impact of the basic components of a PV system: PV panels, PV mounting system, cables, and inverters. The results show that significant amounts of waste materials will be produced in the period 2030-2038. Moreover, this study generalizes the results for the entire Greek territory.
Research Interests:
Research Interests:
Research Interests:
The current work demonstrates a feasibility study on the generation of a copy, having a highly complex geometry, of a Greek paleontological find utilising reverse engineering and low-cost rapid prototyping techniques. A part of the jaw... more
The current work demonstrates a feasibility study on the generation of a copy, having a highly complex geometry, of a Greek paleontological find utilising reverse engineering and low-cost rapid prototyping techniques. A part of the jaw bone of a cave bear (Ursus spelaeus) that lived during the Pleistocene and became extinct about 10,000 years ago was digitized using a three-dimensional laser scanner. The resulting point-cloud of the scans was treated with a series of advanced software for the creation of surfaces and ultimately for a digital model. The generated model was three-dimensionally built by the aid of a Fused Deposition Modeling (FDM) apparatus. An analytical methodology is presented revealing the step by step approach from the scanning to the prototyping. It is believed that a variety of interested parties could benefit from such an analytical approach, including, production engineers, three-dimensional CAD users and designers, paleontologists and museum curators.
Research Interests:
A simulation model capable of representing a large variety of flexible manufacturing systems (FMS) has been developed. The software, written entirely in FORTRAN, can be used during the design and control stages of the FMS development. The... more
A simulation model capable of representing a large variety of flexible manufacturing systems (FMS) has been developed. The software, written entirely in FORTRAN, can be used during the design and control stages of the FMS development. The several modules of the model are described. The model's validation is primarily examined by comparing its results with those obtained using a model written in a specialized simulation language, namely ECSL. Fifteen control strategies are defined and simulation results discussed.
Research Interests:
The introduction of an automated tool flow system in a FMS improves substantially the efficiency of the system and enables rationalisation reserves to be opened-up. In this paper we report on modelling for analysing the tool flow system... more
The introduction of an automated tool flow system in a FMS improves substantially the efficiency of the system and enables rationalisation reserves to be opened-up. In this paper we report on modelling for analysing the tool flow system requirements for an FMS; a simulation model written in FORTRAN programming language and a mathematical model based on the closed loop queuirig network theory, have been developed. The models can estimate machine tools utilization, requirements on storage capacity of the stations, the necessary characteristics of the tool transporting system and the rate of replacement of worn tools.
Research Interests:
A simulation model capable of representing a large variety of flexible manufacturing systems (FMS) has been developed. The software, written entirely in FORTRAN, can be used during the design and control stages of the FMS development. The... more
A simulation model capable of representing a large variety of flexible manufacturing systems (FMS) has been developed. The software, written entirely in FORTRAN, can be used during the design and control stages of the FMS development. The several modules of the model are described. The model's validation is primarily examined by comparing its results with those obtained using a model written in a specialized simulation language, namely ECSL. Fifteen control strategies are defined and simulation results discussed.
Research Interests:
A simulation model capable of representing a large variety of flexible manufacturing systems (FMS) has been developed. The software, written entirely in FORTRAN, can be used during the design and control stages of the FMS development. The... more
A simulation model capable of representing a large variety of flexible manufacturing systems (FMS) has been developed. The software, written entirely in FORTRAN, can be used during the design and control stages of the FMS development. The several modules of the model are described. The model's validation is primarily examined by comparing its results with those obtained using a model written in a specialized simulation language, namely ECSL. Fifteen control strategies are defined and simulation results discussed.
Research Interests:
... related studies within innovation is the bias towards quantitative definition of best practices rather than ... of similar sectors and can be characterised as benchmarks for best practice. ... our innovation survey is the creative... more
... related studies within innovation is the bias towards quantitative definition of best practices rather than ... of similar sectors and can be characterised as benchmarks for best practice. ... our innovation survey is the creative industries sector, which includes software, internet developer ...
Research Interests: Fuzzy Logic, Creative Industries, Benchmarking, Multidisciplinary, Product innovation, and 9 moreTools and Techniques, Production and Inventory planning and control systems, Project manager, Product Development, Innovation process, Small and Medium Size Enterprise, Spectrum, Three Dimensional, and Production Planning and Control (ppc)
... related studies within innovation is the bias towards quantitative definition of best practices rather than ... of similar sectors and can be characterised as benchmarks for best practice. ... our innovation survey is the creative... more
... related studies within innovation is the bias towards quantitative definition of best practices rather than ... of similar sectors and can be characterised as benchmarks for best practice. ... our innovation survey is the creative industries sector, which includes software, internet developer ...
Research Interests: Fuzzy Logic, Creative Industries, Benchmarking, Multidisciplinary, Product innovation, and 9 moreTools and Techniques, Production and Inventory planning and control systems, Project manager, Product Development, Innovation process, Small and Medium Size Enterprise, Spectrum, Three Dimensional, and Production Planning and Control (ppc)
Research Interests:
Research Interests:
Research Interests:
Research Interests:
Research Interests:
Gear hobbing is a highly utilized flexible manufacturing process for massive production of external gears. However, the complex geometry of cutting hobs is responsible for the almost exclusive utilization of high-speed steel (HSS) as... more
Gear hobbing is a highly utilized flexible manufacturing process for massive production of external gears. However, the complex geometry of cutting hobs is responsible for the almost exclusive utilization of high-speed steel (HSS) as cutting tool material. The limited cutting performance of HSS, even coated HSS, restricts the application of high cutting speeds and restricts the full exploitation of modern CNC hobbing machine tools. The application of cemented carbide tools was considered as a potential alternative to modern production requirements. In former investigations an experimental variation of gear hobbing, the so-called fly hobbing was applied, in order to specify the cutting performance of cemented carbide tools in gear production. These thorough experiments indicated that cracks, which were not expected, might occur in specific cutting cases, leading to the early failure of the entire cutting tool. In order to interpret computationally the reasons for these failures, an F...
Research Interests:
Gear hobbing is a highly utilized flexible manufacturing process for massive production of external gears. However, the complex geometry of cutting hobs is responsible for the almost exclusive utilization of high-speed steel (HSS) as... more
Gear hobbing is a highly utilized flexible manufacturing process for massive production of external gears. However, the complex geometry of cutting hobs is responsible for the almost exclusive utilization of high-speed steel (HSS) as cutting tool material. The limited cutting performance of HSS, even coated HSS, restricts the application of high cutting speeds and restricts the full exploitation of modern CNC hobbing machine tools. The application of cemented carbide tools was considered as a potential alternative to modern production requirements. In former investigations an experimental variation of gear hobbing, the so-called fly hobbing was applied, in order to specify the cutting performance of cemented carbide tools in gear production. These thorough experiments indicated that cracks, which were not expected, might occur in specific cutting cases, leading to the early failure of the entire cutting tool. In order to interpret computationally the reasons for these failures, an F...
Research Interests:
ABSTRACT This research proposes a method of organizing an eÄ ective information-transfer system design in a plant-working environment. The method is based on a combi- nation of the visual characteristics principles used in the development... more
ABSTRACT This research proposes a method of organizing an eÄ ective information-transfer system design in a plant-working environment. The method is based on a combi- nation of the visual characteristics principles used in the development of safety systems, visual factory design and advanced training practices. With the visual factory principle, the production area is separated into three task zonesA', `B' andC'. ZoneA' represents theperipheral' orreference' zone, zoneB' repre- sents theaccess' orlink' zone and zoneC' represents themain activity' or `production' zone. When implanted, this system will reduce the probability of worker mistakes and, in combination with CAD, it will provide a tool for eÄ ec- tively managing change in an environment of growing demand for information exchange, revision and update. Thus, the system provides a positive thrust in business continuous improvement. Therefore, the method proposed can serve as an interfunctional tool facilitating the job of theoor workers as well as the plant's middle and top managers.
Research Interests:
ABSTRACT This research proposes a method of organizing an eÄ ective information-transfer system design in a plant-working environment. The method is based on a combi- nation of the visual characteristics principles used in the development... more
ABSTRACT This research proposes a method of organizing an eÄ ective information-transfer system design in a plant-working environment. The method is based on a combi- nation of the visual characteristics principles used in the development of safety systems, visual factory design and advanced training practices. With the visual factory principle, the production area is separated into three task zonesA', `B' andC'. ZoneA' represents theperipheral' orreference' zone, zoneB' repre- sents theaccess' orlink' zone and zoneC' represents themain activity' or `production' zone. When implanted, this system will reduce the probability of worker mistakes and, in combination with CAD, it will provide a tool for eÄ ec- tively managing change in an environment of growing demand for information exchange, revision and update. Thus, the system provides a positive thrust in business continuous improvement. Therefore, the method proposed can serve as an interfunctional tool facilitating the job of theoor workers as well as the plant's middle and top managers.
Research Interests:
Research Interests:
ABSTRACT Recently, virtual reality systems have been presented for simulation of machining processes, aiming at the determination of specific machining parameters, such as the required fixtures and the machining environment, the cutting... more
ABSTRACT Recently, virtual reality systems have been presented for simulation of machining processes, aiming at the determination of specific machining parameters, such as the required fixtures and the machining environment, the cutting tool dynamics, the chip shape and volume, and the shape of the cutting tool. This study proposes a methodology for the development of a virtual environment for three axis milling process simulation. The technological and research challenges involved in this methodology are described. The operation of a new system developed by the authors for machining-process simulation in a virtual environment is presented. This system integrates a virtual reality environment with computational and graphical models for the simulation of three axis milling processes. A computational model has been developed for the visualisation of the milling process in the virtual environment and graphical model has been developed for the calculation of quantitative data related to surface roughness of machined surfaces.
Research Interests:
Research Interests:
Most universities have included computer-aided design (CAD) pattern making systems education and training in their clothing technology courses in recent years, so as to respond to the actual needs of the fashion world for high-skilled... more
Most universities have included computer-aided design (CAD) pattern making systems education and training in their clothing technology courses in recent years, so as to respond to the actual needs of the fashion world for high-skilled fashion designers and clothing engineers. With the rapid rise in the use of open source software (OSS) in all types of applications, it is important to know if the existing OSS CAD software for garment prototyping development can successfully support the learning process. The present study compares two commercial licensed CAD systems for pattern design (Polypattern and Create) to an open source software, Seamly2D, and to Wild Ginger’s Caveo V6 programme, which runs within an OSS. In total, two licensed and two OSS systems have been evaluated in their weights in accomplishing the garment development of ten different pattern designs. The results obtained for the evaluation of a set of OS and licensed CAD systems are presented and critically discussed.
Research Interests:
Research Interests:
The objective of this paper is to present the innovative training centre for CNC: http://www.vtcforcnc.com. The Virtual Training Centre (VTC) was set up on the Internet for Computer Numerical Control (CNC) training based on virtual aids.... more
The objective of this paper is to present the innovative training centre for CNC: http://www.vtcforcnc.com. The Virtual Training Centre (VTC) was set up on the Internet for Computer Numerical Control (CNC) training based on virtual aids. A virtual space (a CNC training portal) on the Internet which allows the constant sharing of e-learning-based CNC teaching material was created so as to foster the further development of e-learning based CNC educational contents. The VTC for CNC is an interactive platform, a meeting point for policy-makers, social-partners, practitioners, researchers and all those with an interest in CNC field of vocational education and training. Experts in the field are able to share and exchange knowledge and experience with associates within and outside the European Union.