Προσομοίωση λειτουργίας χημικού αισθητήρα τύπου χωρητικότητας

Εθνικό Μετσόβιο Πολυτεχνείο--Μεταπτυχιακή Εργασία. Διεπιστημονικό-Διατμηματικό Πρόγραμμα Μεταπτυχιακών Σπουδών (Δ.Π.Μ.Σ.) “Μικροσυστήματα και Νανοδιατάξεις

Analysis of data segmentation algorithms and their applications on ancient scripts

92 σ.Aποτελεί αδιαμφισβήτητο γεγονός πως σχεδόν όλοι οι τομείς της ανθρώπινης δραστηριότητας έχουν ευεγερτηθεί από την εισαγωγή υπολογιστών όσο και υπολογιστικών συστημάτων στις μεθόδους τους. Στο παρών έργο θα ασχοληθούμε με την εφαρμογή μεθόδων της υπολογιστικής όρασης στον κλάδο της επιγραφολογίας, του κλάδου της αρχαιολογίας που έχει ως αντικείμενο τη μελέτη ευρημάτων που περιέχουν πληροφορίες κειμένου. Με τη χρήση αυτών των πρωτότυπων τεχνικών επεξεργασίας ψηφιακής εικόνας και μαθηματικών τεχνικών στην ανάλυση επιγραφών σηματοδοτήθηκε μια νέα εποχή στον κλάδο της επιγραφολογίας χωρίς να αποτελεί υπερβολή να μιλάμε για την γέννηση ενός νέου επιστημονικού πεδίου, της Ψηφιακής Επιγραφολογίας (Digital Epigraphy).It forms an undeniable fact that almost all areas of human activity have been benefited the introduction of computers and computer systems in their methods . In this work we will deal with the application of computational methods in the field of vision epigrafologos , industry archeology that has as its object the study findings containing text information . By using these original digital image processing techniques and mathematical techniques to analyze inscriptions marked a new era in the field of epigrafologos not an exaggeration to talk about the birth of a new scientific field, (Digital Epigraphy)Νικόλαος-Φοίβος Ε. Γαλάτουλα

Spatio-Temporal Trends of E-Bike Sharing System Deployment: A Review in Europe, North America and Asia

Recent data on conventional bike and/or electric bike (e-bike) sharing systems reveal that more than 2900 systems are operating in cities worldwide, indicating the increased adoption of this alternative mode of transportation. Addressing the existing gap in the literature regarding the deployment of e-bike sharing systems (e-BSSs) in particular, this paper reviews their spatio-temporal characteristics, and attempts to (a) map the worldwide distribution of e-BSSs, (b) identify temporal trends in terms of annual growth/expansion of e-BSS deployment worldwide and (c) explore the spatial characteristics of the recorded growth, in terms of adoption on a country scale, population coverage and type of system/initial fleet sizes. To that end, it examines the patterns identified from the global to the country level, based on data collected from an online source of BSS information worldwide. A comparative analysis is performed with a focus on Europe, North America and Asia, providing insights on the growth rate of the specific bikesharing market segment. Although the dockless e-BSS has been only within three years of competition with station-based implementations, it shows a rapid integration to the overall technology diffusion trend, while it is more established in Asia and North America in comparison with Europe and launches with larger fleet sizes

Development and On-Field Testing of Low-Cost Portable System for Monitoring PM2.5 Concentrations

Recent developments in the field of low-cost sensors enable the design and implementation of compact, inexpensive and portable sensing units for air pollution monitoring with fine-detailed spatial and temporal resolution, in order to support applications of wider interest in the area of intelligent transportation systems (ITS). In this context, the present work advances the concept of developing a low-cost portable air pollution monitoring system (APMS) for measuring the concentrations of particulate matter (PM), in particular fine particles with a diameter of 2.5 μm or less (PM2.5). Specifically, this paper presents the on-field testing of the proposed low-cost APMS implementation using roadside measurements from a mobile laboratory equipped with a calibrated instrument as the basis of comparison and showcases its accuracy on characterizing the PM2.5 concentrations on 1 min resolution in an on-road trial. Moreover, it demonstrates the intended application of collecting fine-grained spatio-temporal PM2.5 profiles by mounting the developed APMS on an electric bike as a case study in the city of Mons, Belgium