This award solves design of two models that are designed to teach on PLC and in the future on the Control Web. Both models should be used in LabLink system, which allows you to remotely working on laboratory tasks. The first software model simulates the movement of trains on rail in relation on control from the PLC. The second model is a physical model of drill. In both models are solid managing and type of construction, which allows operation without physical intervention.

This master’s thesis is devoted to safe operating remote station. The security of data and electronic services is very important nowadays because the number of attacks to computer networks is increasing. The security of network services and information can be provided in several different ways which can be combined. The basic security mechanisms are authentication and data encryption. Both these methods are included to the implementation of operating remote station which is the main part of this work. The user of the resulting application will have a choice from several methods of authentication and data encryption. Whole traffic is encryption from the transfer of view of remote desktop to the transfer of files. Safety factor depends only up to the user consequently on that what type of authentication and encryption the user choose. The thesis also deals with analysis of implemented safely functions. Brings the results of analysis of effect of encryption algorithms to data connection of remote desktop.

This thesis deals with remote access to mobile devices with the Android system and their remote control possibilities. The aim was to create the interface for mobile devices remote control by remote desktop and also for changing mobile device's settings remotely. I focused on the utility of remote control for assistance in mobile devices usage. The solution was to create an application with the control interface, then application being controlled, and the server enabling communication between them. The server has been created with use of the Node.js technology. Socket.io library has been used for enabling communication between applications in real time. The remote desktop utilizes sending of screenshots and its clicks coordinates. These clicks on the remote device are executed by hidden API. Remote settings change uses API of Android SDK. It has been managed to develop the system that enable the control of the Android device and also to change its settings, both remotely.

I en värld där kraven på flexibilitet, säkerhet och hårdvaruoptimering är nyckelfaktorer när det kommer till att välja IT-miljöer för företag blir virtuella skrivbord mer och mer poulära. Med dessa miljöer finns det också problem när det kommer till användarupplevelsen om nätverket ifråga inte kan uppfylla de krav som ett sådant system ställer. I detta arbete undersöks implikationerna vissa nätverksvariabler kan ha för en Virtual Desktop-infrastruktur, VDI. För att belysa dessa problem har två tester utförts på en VDI miljö. Det första testet gick ut på att mäta latensen då skrivbordsmiljön renderades för klienten från virtualiseringsservern vid olika nätverksdiamterar. Det andra testet gick ut på att mäta samma latens vid olika nätverksbelasting på anslutningen mellan klienten och virtualiseringsservern. När det blev tydligt att nyckelfaktorn var nätverksbelastningen skapades ett test för att undersöka klientens möjlighet till påverkan av bandbredden. Överföringen av data till användarens lokala skrivbord som i förlängningen huseras på virtualiseringsservern tog upp hela bandbredden och lämnade inget för VDI-trafiken och stänger i förlängningen ner hela VDI systemet. Detta löstes genom att implementera Quality Of Service medelst Traffic Policing . Därmed kan användarens möjlighet att nyttja bandbredden till virtualiseringsservern begränsas. / In a world where the demand for flexibility, security, and hardware optimization are key factors when it comes to implementing a corporate IT environment Virtual Desktop solutions a gaining more and more ground. With these environments there are also issues when it comes to user experience if the network in question is unable to fulfill the specifications that such an environment requires. We have looked at the implications some network variables might have for a VDI solution. To shed a light on these issues we have conducted two tests in an VDI environment. The first test consisted of measuring the latency at which the desktop on the client was rendered from the virtualization server at different network sizes. The second test was to measure the same latency at different bandwidth loads on the line between the client and the Virtualization Host. As we realised that the key factor was the bandwidth load, we made a test to measure the way a client could influence that bandwidth. We saw that by transferring data to the desktop (i.e. the Virtualization Host) one user could personally take up the whole bandwidth and leave noting for the VDI traffic, rendering it useless. This was solved by implementing Quality of Service in the form of Traffic policing, thus restricting the amount of bandwidth the user could use for file transfers.

Made available in DSpace on 2016-06-02T19:06:14Z (GMT). No. of bitstreams: 1 6118.pdf: 3001954 bytes, checksum: 5643531722be67da01c9dfa9c79f4ecb (MD5) Previous issue date: 2014-05-22 / Financiadora de Estudos e Projetos / Computer graphics and virtual reality technologies allow audiovisual experiences with high level of realism, as the ones achieved in video games and movies. The synthetization of media with high degree of audiovisual realism demands specialized systems with high performance computing capacity. The profusion in the last decade of personal computing consumer electronics such as mobile and portable devices, encourages the interest in making possible, also in these devices, applications with high level of visual realism. However, due to the intrinsic limitations of the computing capability of mobile and portable devices, regarding to the physical characteristics of these devices, such as dimensions, electrical consume and heat dissipation, it s not possible directly process media with the same level of visual realism that is found in specialized systems. This research suggests the exploration of a traditional solution: the remote interaction with these applications. Challenges resulting from this approach are identified and studied. Solutions are proposed, analyzed and formalized in a architecture for reference. As a proof of concept the architecture is used in the development of applications on two scenarios: one in a local network with a media characterized by its low tolerance in delay of interaction response and another with a high tolerance media through the Internet. Also is showed the flexibility of the proposed architecture by integrating one of the applications developed with a multimedia context. / As tecnologias de computação gráfica e realidade virtual permitem experiências visuais e auditivas com alto nível de realismo sensorial, como alcançado em jogos eletrônicos e no cinema. A sintetização de mídia com alto grau de realismo visual e auditivo demanda sistemas especializados com capacidade computacional de alto desempenho. A profusão na última década de eletrônicos de consumo computacionais pessoais, como dispositivos móveis e portáteis, desperta o interesse em tornar possível, também nesses dispositivos, aplicações visuais com alto nível de realismo. Devido às limitações da capacidade computacional intrínsecas dos dispositivos móveis, decorrentes de suas características físicas, como dimensões, restrições de consumo e dissipação térmica, não é possível a execução direta de mídia interativa com o mesmo grau de realismo encontrado em sistemas especializados. Este trabalho sugere a exploração de uma solução tradicional: o processamento e a interação remota com esse tipo de mídia. Desafios decorrentes dessa solução são identificados e estudados. Soluções são propostas, analisadas e formalizadas em uma arquitetura de referência. Como prova de conceito da arquitetura explorou-se o desenvolvimento de aplicações em dois cenários: um em rede local com mídia de baixa tolerância a atrasos no tempo de resposta às interações e outra através da Internet com mídia de maior tolerância a atrasos. Mostrouse também a flexibilidade da arquitetura desenvolvida com a integração do componente cliente a um sistema com múltiplas mídias, em que a mídia remota relaciona-se integralmente com o contexto multimídia.

Οι ενσωματωμένες συσκευές αποτελούν μια κατηγόρια υπολογιστών ειδικού σκοπού με ραγδαία αύξηση τα τελευταία χρόνια. Σε αντίθεση με τους γνωστούς σε όλους υπολογιστές γενικού σκοπού που μπορούν να επιτελέσουν σχεδόν οποιαδήποτε λειτουργία, οι ενσωματωμένες συσκευές επιτελούν μόνο συγκεκριμένες λειτουργίες, οι οποίες είναι προκαθορισμένες κατά τον σχεδιασμό τους. Η διαχείριση τέτοιων και μη συσκευών αποτελεί ένα τεράστιο κεφάλαιο αφού η διαφορετικότητα των λειτουργιών τους, δημιουργεί ένα διαφορετικό τρόπο αντιμετώπισης τους κατά την πρακτική της διαχείρισης. Υπάρχει περιορισμός στα διαθέσιμα εργαλεία για την διαχείριση όλων των ενσωματωμένων συστημάτων με ένα εργαλείο, αλλά η ερεύνα μας επικεντρώνεται στη διαχείριση οικογενειών τέτοιων συσκευών με κριτήριο τη λειτουργία του ειδικού σκοπού που επιτελούν. Σκοπός λοιπόν της εργασίας είναι ο σχεδιασμός και η ανάπτυξη λογισμικού για την ομαδική διαχείριση οικογένειας ενσωματωμένων συσκευών και κοινών υπολογιστών γενικού σκοπού οπουδήποτε λειτουργικού συστήματος. Η συνεισφορά της υπάρχουσας εργασίας συνοψίζεται στις εξής συνιστώσες: 1. Οι ενσωματωμένες συσκευές στις οποίες επικεντρωθήκαμε αφορούν δικτυακές συσκευές (ασύρματες ή ενσύρματες) πολλών λειτουργιών (Access Points, Clients, Repeaters,Points to Points, WDS, Transparent Clients, Routers). 2. Το λογισμικό για υπολογιστές ειδικού σκοπού που δημιουργήθηκε μπορεί να εκτελεστεί τόσο σε λειτουργικά συστήματα MS Windows όσο και σε *ΝΙΧ. 3. Η ανάπτυξη του λογισμικού έγινε βάση του συστήματος ORSM, το οποίο είναι ένα εργαλείο ανοικτού κώδικα για την απομακρυσμένη διαχείριση συστημάτων και δικτύων. (Με αστερίσκο * τόσο στα περιεχόμενα όσο και στο κύριο μέρος της εργασίας δείχνουμε τις δυνατότητες του νέου λογισμικού σε σχέση με το σύστημα ORSM). Συνοπτικά οι δυνατότητες διαχείρισης αφορά τις παρακάτω λειτουργίες: • Ανακάλυψη περιουσιακών στοιχείων (Inventory Process). • Παρακολούθηση απόδοσης συστημάτων (Monitoring). • Εγκατάσταση και απεγκατάσταση λογισμικού (Software Deployment). • Απομακρυσμένο έλεγχο (Remote Desktop). • Εκτέλεση εντολών κελύφους (Remote Command). / An embedded system is a special-purpose computer system designed to perform one or a few dedicated functions, often with real-time computing constraints. It is usually embedded as a part of a complete device including hardware and mechanical parts. In contrast, a general-purpose computer, such as a personal computer, can do many different tasks depending on programming. Embedded systems control many of the common devices in use today. Managing infrastructure with such devices (embedded and general purpose computers) is usually demanding and expensive but nevertheless essential for organizations. There is a limit in tools which achieve effective management to those infrastructure topologies. At present, open management solutions are few and immature however there are tools such as OpenRSM aiming to deliver lightweight, remote and customizable management, easily customizable to cover the needs of small organizations. OpenRSM implements a generic management framework that models generalized use cases that can be exploited by users to adapt the tool to their needs. However, given maturity of the tool, it is unclear how easy it would be for users to extend it in order to include management of new types of devices. As network environments grow to digital ecosystems, the management targets increase in number and diversity. Wireless active elements, handheld systems or embedded devices are becoming common and need to be brought under standard management practices in the same manner as routers or workstations. This paper describes how the OpenRSM management functionality can be extended in order to provide customizable management of embedded devices and more specifically of wireless access points (the symbol * shows the new extension of ORSM). In general the management capabilities which are embed to OPENRSM system and target to wireless active elements are: (Inventory process, monitoring, firmware upgrade, save/reload configuration settings, remote commands, and discovery process).