Triangulation positioning system - Network and topology issues

This paper presents ongoing work on localization and positioning through triangulation procedure. Issues of scalability and topology are also examined and areas that are problematic and need further analysis and implementation in the network are analyzed. In a Fixed Stations Network, as it was presented in [1] a triangulation problem is becoming high complicated when we have a large number of sensors and transmitters.Sensors bearings and data readings have to be checked on a case by case basis.The combination and processing of a vast number of data needs filtering and implementation of the various cases, whilst synchronously data processing in various stages can provide accurate results

Triangulation positioning system network

This paper presents ongoing work on localization and positioning through triangulation procedure for a Fixed Sensors Network - FSN. The FSN has to work as a system. As the triangulation problem becomes high complicated in a case with large numbers of sensors and transmitters, an adequate grid topology is needed in order to tackle the detection complexity. For that reason a Network grid topology is presented and areas that are problematic and need further analysis are analyzed. The Network System in order to deal with problems of saturation and False Triangulations - FTRNs will have to find adequate methods in every sub-area of the Area Of Interest - AOI. Also, concepts like Sensor blindness and overall Network blindness, are presented. All these concepts affect the Network detection rate and its performance and ought to be considered in a way that the network overall performance won’t be degraded.Network performance should be monitored contentiously, with right algorithms and methods. It is also shown that as the number of TRNs and FTRNs is increased Detection Complexity - DC is increased. It is hoped that with further research all the characteristics of a triangulation system network for positioning will be gained and the system will be able to perform autonomously with a high detection rate

Coverage Area of a Localization Fixed Sensors Network System with the process of Triangulation

Copyright © 2021 The Authors. This paper presents a novel work on localization of transmitters using triangulation with sensors at fixed positions. This is achieved when three or more sensors cover the whole area, a factor which enables the system to perform localization via triangulation. The network needs to keep a high detection rate which, in most cases, is achieved by adequate sensor coverage. Various tests using various grids of sensors have been carried out to investigate the way the system operates in different cases using a lot of transmitters. Detection complexity is tackled by finding the optimal detecting sensor radius in order the network to continue operate normally. The coverage quality changes in the area of interest and the network is able to detect new transmitters that might enter it's area. It is also shown that as the number of transmitters increases the network keeps its high performance by using additional groups of sensors in a sub-region area of that of interest. This way, even when the network is saturated by many transmitters in one region, new transmitters can still be detected

Station network triangulation positioning system

This paper examines the triangulation problem approached from the perspective of a fixed stations network. An initial state A of n sensors (SRs) and m transmitters (TRs).might change from its initial state to a new state B and m +1 transmitters The fixed stations /sensors should recognize the new state B and find the new transmitters that entered in the area by finding with triangulation procedures the positions of the new transmitters. Cases of misinterpretation of data and accuracy problems when more than three lines intersect are explored. It is also shown that when there is a high number of transmitters and a lot of readings the data analysis procedure becomes more complex and software architecture needs adaptation

Kollektivt lärande i sociala rörelser

Avhandlingens syfte är att undersöka hur medlemmar i olika sociala rörelser uppfattar kollek- tivt lärande och hur detta lärande skapas i den sociala rörelse de är medlem av. Forskning kring kollektivt lärande i sociala rörelser har främst varit fokuserad på individens lärande i ett identitetsperspektiv. Syftet med denna avhandling är att öka kunskapen om vuxnas kollektiva lärande i sociala rörelser genom att besvara följande forskningsfrågor: 1. Vilka olika uppfattningar har medlemmar i sociala rörelser om vad kollektivt lärande är? 2. Vilka olika uppfattningar har medlemmar i sociala rörelser om hur det kollektiva lärandet skapas? Intervjuundersökning med fenomenografisk ansats har använts. Åtta medlemmar från fyra sociala rörelser i Österbotten och Mellersta Österbotten intervjuades. Urvalet baserar sig på principen om variation både i fråga om valet av sociala rörelser (typ, storlek, ålder) och i fråga om valet av informanter (kön, ålder, medlemstid). Resultatet av den fenomenografiska analysen är ett utfallsrum med åtta beskrivningskategorier: planerat lärande, delande av ansvar och uppgifter i en gemenskap, utvecklande av existerande färdigheter och arbetsformer, lärande med hjälp av rutiner, delande, samlande och skapande av kunskap tillsammans med andra, lärande som uppstår genom att vara med och göra något till- sammans med andra, lärande genom samarbete och dialog med omgivningen, lärande genom att göra något för andra och sig själv samtidigt. Det kollektiva lärandet i sociala rörelser består av både informellt och ändamålsenligt lärande och skapas antingen på en eller flera nivåer i interaktioner mellan individ, sociala rörelser, andra organisationer och omgivningen. Det är möjligt att medlemmarnas lärande beror på den position som de har i den sociala rörelsen, eftersom det fanns skillnader mellan hur medlemmar med och utan styrelseuppdrag uppfattar kollektivt lärande. Det individuella och det kollektiva lärandet var svårt att hålla isär, vilket tyder på att medlemmens kunskap och lärande skapas i och flyter samman med den sociala rörelsens och andra medlemmars kunskapsskapande. Undersökningen har ökat kunskapen om det kollektiva lärandet i sociala rörelser. Den kan vara till nytta för sociala rörelser och de som arbetar med utveckling av sociala rörelsers verk- samhet genom att skapa större förståelse för lärandets många aspekter, vilket kan bidra till en mer mångsidig utveckling av sociala rörelsers verksamhet och medvetenheten om hur lärande skapas

Cooperation and telecooperation for effective workplace learning

Summarization: A project for the establishment of a cooperative educational scheme for industrial work experience is being carried out by the Technological Educational Institute of Crete/Department of Electronics under the financial support of the European Union's Community Support Framework for Greece. Our main challenge was to incorporate a project- and/or problem-based methodology for the participating students. Furthermore, we enhanced and facilitated the cooperation between students, the industry mentor and the faculty mentor by electronic communications through an appropriately designed Web site. A description of our overall project is presented, with emphasis given to innovative actions, such as the tele-cooperation activities of all parties involved and the so-called "Industry Placement Days". Practical aspects of students' experience and the cultivation of their skills during their industrial placement are reported. In each case, the work students had to carry out, was highly related to subjects they were taught during their studies, i.e. electronics, automation technology and telematicsΠαρουσιάστηκε στο: Frontiers in Education Conference, 36th Annua

Interconnecting smart card system with PLC controller in a local operating network to form a distributed energy management and control system for buildings

Δημοσίευση σε επιστημονικό περιοδικόSummarization: Distributed control and energy management for buildings is a viable solution, ensuring both indoor comfort for the occupants and reduction of energy consumption. The aim of this paper is to present the architecture of a distributed building energy management system that can be installed in new as well as in existing buildings, which are more energy inefficient. The system integrates a smart card unit, acting as a user machine interface, sensors, actuators, interfaces, a PLC controller that incorporates the fuzzy control algorithm, local operating network (LON) modules and devices and an optional PC which monitors the performance of the system. The distributed control architecture is based on the properties of the LON. The complete system is installed and tested in the Laboratory of Electronics of the Technical University of Crete.Presented on: Energy Conversion and Managemen