Alexios Papacharalampopoulos - Academia.edu (original) (raw)

Papers by Alexios Papacharalampopoulos

2021 Sixth Junior Conference on Lighting (Lighting)

Designs

Outdoor lighting design consists of many different objectives, depending on the area that is illu... more Outdoor lighting design consists of many different objectives, depending on the area that is illuminated. In addition, besides functional lighting, extra messages may be superimposed to a lighting configuration. This adds to the complexity of the lighting design. Furthermore, temporal variations in lighting may be used as an additional tool of expressivity. All the above require some basic training and also some familiarity with expression tools. In this work, a framework is given for seamless communication through lighting, including both spatial and temporal lighting patterns. To this end, two different kinds of time scales are considered, leading to case studies for both seasonal lighting and communication through rapid spatiotemporal differentiations in it. The framework is two-fold, allowing for both diagrammatic and quasi-algebraic elaboration, leading to interesting visual results and providing the first step towards optimization. Different cases of outdoor lighting are consi...

The temporal variation in lighting has not been thoroughly studied, even though there are works, ... more The temporal variation in lighting has not been thoroughly studied, even though there are works, either technical or artistic, that exploit this aspect. In this work, under the generalization of the outdoor lighting, two different time scales are considered; fast variations and seasonal differentiations. In the context of the first ones, the temporal variation is used both to provide extra information and point out the message. Specific case studies are used to illustrate cases for various applications of time-variant outdoor lighting.

Not-optimized code for printing in "one-pass" a wall with hole that also has ... more Not-optimized code for printing in "one-pass" a wall with hole that also has a region that can be milled out The output of the code is the set of points generated for a 3D Printer (c) 2019-Today, Creative Commons Attribution 4.0 International The code has been created by Alexios Papacharalampopoulos, LMS, Patras, Greece The original idea of the wall has been created by Javier Alonso Madrid, ATANGA, Madrid, Spain Manuel Menendez Muñiz, VIAS, Madrid, Spain Joseph CANOU, ESTIA, Bayonne, France Useful link for superformula used herein: https://en.wikipedia.org/wiki/Superformula

The International Journal of Advanced Manufacturing Technology

The output of the code is the set of lines created by a 3D Printer The code has been cr... more The output of the code is the set of lines created by a 3D Printer The code has been created by Alexios Papacharalampopoulos, LMS, Patras, Greece The original drawings of the slab have been created by Javier Alonso Madrid, ATANGA, Madrid, Spain

Not-optimized code for printing a "vase" part of changing cross-section The o... more Not-optimized code for printing a "vase" part of changing cross-section The output of the code is the set of points to be followed by a 3D Printer (c) 2019-Today, Creative Commons Attribution 4.0 International The code has been created by Alexios Papacharalampopoulos, LMS, Patras, Greece *** The concept of superformula is used

Not-optimized code for printing a "vase" part of variable inclination The out... more Not-optimized code for printing a "vase" part of variable inclination The output of the code is the set of points to be followed by a 3D Printer (c) 2019-Today, Creative Commons Attribution 4.0 International The code has been created by Alexios Papacharalampopoulos, LMS, Patras, Greece

Procedia Manufacturing, 2020

A smart mobility platform aiding in guidance of disabled people is a concept that can facilitate ... more A smart mobility platform aiding in guidance of disabled people is a concept that can facilitate people's everyday life. However, design and manufacturing of such a system faces many issues in terms of agility in design, implementation and usability verification. To this end, the concept of Product-Service System (PSS) seems to be the solution; being an emerging concept oriented towards the dematerialisation of the economy, meeting also the requirement of manufacturing industries to cope with the radical changes in the global market. In this study, the development of a context awareness and path planning system under the prism of PSSs is examined. This module is considered to be promoted as a pay per service unit that can be implemented in different operational scenarios and environments. The key objective is to deliver the obstacle avoidance and path planning functionality and add value to the customer, but at the same keep the production lean and flexible. To this end, Round Robin parts are presented, taking into account mounts and jigs for controllers dealing with supervised machine learning techniques and path planning, lightweight system-of-sensors and structural integrity of the module. The concept evaluation is outlined through a case study based on the integration of the system in a smart mobility platform to provide autonomous mobility. The mobility platform is expected to operate within a predefined area, characterized by a complex environment.

The first Demo of REALM regarding SAW process

The second Demo of REALM regarding RSW process

Procedia CIRP, 2019

In today's business environment, the trend towards more product variety and customization is unbr... more In today's business environment, the trend towards more product variety and customization is unbroken. Due to this development, the need of agile and reconfigurable production systems emerged to cope with various products and product families. To design and optimize production systems as well as to choose the optimal product matches, product analysis methods are needed. Indeed, most of the known methods aim to analyze a product or one product family on the physical level. Different product families, however, may differ largely in terms of the number and nature of components. This fact impedes an efficient comparison and choice of appropriate product family combinations for the production system. A new methodology is proposed to analyze existing products in view of their functional and physical architecture. The aim is to cluster these products in new assembly oriented product families for the optimization of existing assembly lines and the creation of future reconfigurable assembly systems. Based on Datum Flow Chain, the physical structure of the products is analyzed. Functional subassemblies are identified, and a functional analysis is performed. Moreover, a hybrid functional and physical architecture graph (HyFPAG) is the output which depicts the similarity between product families by providing design support to both, production system planners and product designers. An illustrative example of a nail-clipper is used to explain the proposed methodology. An industrial case study on two product families of steering columns of thyssenkrupp Presta France is then carried out to give a first industrial evaluation of the proposed approach.

Procedia CIRP, 2018

Procedia CIRP, 2013

This paper shows the results of a preliminary experimental investigation on tool-wear in end mill... more This paper shows the results of a preliminary experimental investigation on tool-wear in end milling. Spindle torque and vibration signals were recorded during the process. A correlation between measured signals and tool-wear was attempted. The preliminary results showed a promising application laying the foundation for an experimental modelling approach of the toolwear phenomenon. Power consumption, as depicted from the current draw signal, can be associated with the sustainability evaluation of the milling operation, due to their directly correlation to the toolwear level.

Designs, 2022

Rising carbon emissions are linked to the increase in global temperature, because of increasing h... more Rising carbon emissions are linked to the increase in global temperature, because of increasing human activities and increasing greenhouse gas emissions. Since manufacturing is one of the most carbon intensive sectors, it is vital to suggest solutions that lead to carbon emission reduction in all sectors, among which is the steelmaking manufacturing sector. The present study focuses on presenting a framework for energy intensive industries introducing digitalization and energy efficient equipment in the production line. The current framework proposes different metrics, both from carbon emissions and cost viewpoints. A secondary steelmaking industry was used as a case study, showcasing the impact of digitalization and energy efficient equipment towards the reduction of carbon emissions. In addition, different metrics were calculated with energy efficient scenarios providing the lowest energy consumption metric, but their high purchasing costs make these scenarios less attractive. How...