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Browsing Mastergradsoppgaver i teknologi - informatikk by Author
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Aarflot, Tjalve (Master thesis; Mastergradsoppgave, 05-Feb-2009)[+][-]
Abstract: In recent years, an increasing amount of personal images, video, sound and text data are captured and stored in a digital format. Increased storage capacity at lower cost entice us to attempt to store everything, but without effective information retrieval techniques, the usefulness of the data becomes limited. Some people have taken personal data capture to extremes and have begun to capture digitally all aspects of their life, which creates enormous archives of multimedia data. This is not a new idea: in 1945 Vannevar Bush wrote his visionary article “As We May Think” where he described Memex, the first Human Digital Memory (HDM). Today we have projects like Microsoft MyLifeBits building on the Memex vision, however there has been little focus on organizing this kind of data effectively. By applying data reduction, we show the benefits of removing redundancy from HDMs, and illustrate how the same data reduction framework can be used to effectively support information access from HDMs. URI: http://hdl.handle.net/10037/1825 File(s) in this item: 1
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Dahle, Peter (Master thesis; Mastergradsoppgave, 15-Jun-2007)[+][-]
Abstract: Several actors are involved in all layers the handset architecture, from hardware producers to service providers, and the numbers are raising. Lack of collaboration amongst these actors across and within layers has led to a complex development-process of services and applications, which in turn leads to difficult use of such applications and services. In this thesis we took a closer look at the mobile phone, examined challenges surrounding development and use of services on mobile phones, and found initiatives by actors to handle these challenges. This knowledge was used to design and implement a solution to handle identified challenges. The solution involves using the UICC as the main application platform and container of state, with the possibility to deploy handset-specific parts of an application on the handset. Standardized tools on the handset give UICC-applications the means to communicate with external processes and users. In addition the network operator is given an important role to administrate and adapt applications on the UICC as services change communication technology and application standard. The designed architecture facilitates more widespread development and use of services on the mobile handset. The architecture is realizable through current platforms and standards. By implementing a simulation and subset of our design on a handset the design was substantiated. URI: http://hdl.handle.net/10037/1136 File(s) in this item: 2
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Devik, Rune (Master thesis; Mastergradsoppgave, 15-Dec-2003)[+][-]
Abstract: WAIF started out in 2002 and the overall goal is to make the computers automatically search for relevant information based on the user’s preferences, and to push this information directly to the user wherever he/she is and to whatever device he/she has available. In other words, make the machines serve us, with as little human interaction as possible. This thesis focuses on a specific part of this problem, which is to design and implement a search mechanism and the surrounding distributed system that can find publishers that publish on a given topic. We present a search mechanism that is scalable, fault resistant, self administrative and that utilizes the resources already present in the network. This is done by utilizing the powers of the unstructured overlay peer-to-peer architecture. However creating an efficient search mechanism for a pure peer-to-peer net is known to be a problem due to the decentralized nature of these overlay networks. Our solution is to incorporate several known techniques. We propose the use of Random Walks supplemented by both a hint cache and a probabilistic gossiping mechanism. The results gathered show that the search mechanism has good coverage but is highly dependent on that the time to live (TTL) set on the query reflects the size of the overlay network and that the nodes individual hint caches are populated. To verify our design we have both implemented the system and a simulator. We show with throughput testes and simulations that the system designed can scale to millions of users. URI: http://hdl.handle.net/10037/289 File(s) in this item: 1
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Ekvang, Espen (Master thesis; Mastergradsoppgave, 01-Jun-2007)[+][-]
Abstract: Everywhere we go we are overwhelmed with impressions and experiences making our day. Research has proven these to change over time, thus psychologists and experimenters in surveys are interested in what a person actually experienced at a particular point in time, referred to as immediate experience. Whether it was as a reaction to some event or just at specific times during the day, is determined by the purpose of the project. By allowing an experimenter to ask questions to a set of participants at predefined times and dates, the approach called Experience Sampling Method (ESM) aims at capturing user experiences. To be able to ask such questions participants are required to carry some kind of device running the actual survey. Since most people possesses a mobile phone, this can serve as an excellent host for ESM surveys. In this thesis we have studied the ESM approach, and the design and implementation of a prototype framework for creating, running and collecting results from surveys based on ESM will be presented. Several mobile operating systems and devices exist, hence an important concern in our work has been interoperability between different devices. To achieve this goal we have emphasised on expressing all information exchanged between a computer and a mobile device in eXtensible Markup Language (XML). From our work we have seen that the flexibility of the prototype makes the system not limited to psychological surveys only, but the approach can be used as a very powerful tool for example in market analysis. URI: http://hdl.handle.net/10037/1042 File(s) in this item: 2
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Eriksen, Dan Peder (Master thesis; Mastergradsoppgave, 01-Jun-2007)[+][-]
Abstract: With the emergence of the internet and e-commerce in the 90’s new common problems arose when developing applications that span the internet. These common problems include among others scalability, robustness, networking, database usage and heterogeneity. Software developers creating internet applications saw themselves reinventing the wheel repeatedly. This lead to the creation of middleware systems that aimed to solve these common problems. This thesis will present Argos which uses a different way of building middleware systems. Argos is able to provide tailored, flexible and extensible middleware support using reflection, dependency injection, Java Management Extensions (JMX) notifications and hot deployment. The result is a platform capable of tackling domain specific challenges. It provides rapid development of feature rich applications for managing and processing information. Argos has gone through thorough testing proving production stability. URI: http://hdl.handle.net/10037/1138 File(s) in this item: 1
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Evertsen, Martin Hætta (Master thesis; Mastergradsoppgave, Jun-2010)[+][-]
Abstract: People love to take images, but are not so willing to annotate the images af-terwards with relevant tags. Manually tagging images is both subjective (dependent on annotator) and time consuming. It would be nice if the tag-ging process could be done automatically. A requirement for effective searching and retrieval of images in rapid growing online image databases is that each image has accurate and useful annotation. This thesis shows that automatic tagging of images with relevant tags is possible by using a combination of the capture location, the date/time when the image was captured and an image category. The use of image categories (together with location and date/time) ensures that many relevant tags are returned and restrict the occurrence of noisy tags to a very low level despite using a noisy image database (Flickr). Other methods used for further re-stricting noise are to restrict usage of more than one image from same user (as basis for tagging the query image) and a dynamic approach for using many images when possible, and fewer images when not many relevant im-ages are found. The designed system is able to tag an image as long as there are a sufficient number of geo-referenced and already tagged images that is relevant for the query image available on Flickr. The query image must also have been geo-referenced and it is assumed that the user provides an image category. Im-ages are processed based on which category the images belongs to, i.e. an image is processed with the best method to handle images belonging to that specific category. In short, this means that images of objects or places are processed differently than images from events. The evaluation of the system indicates that usage of image categories is very helpful when tagging images. The system finds more relevant tags and fewer noisy tags than baseline systems using only location. It also performs good compared to a system using both location and content-based image analysis. URI: http://hdl.handle.net/10037/2633 File(s) in this item: 1
thesis.pdf (2.347Mb) -
Fredriksen, Lars A. (Master thesis; Mastergradsoppgave, 15-Aug-2007)[+][-]
Abstract: This thesis describes the research of grading security in private Peer-to-Peer (P2P) networks, and ultimately the development of “The Socialized.Net Embedded – Cryptography Version” (Tsnecv). Tsnecv is a revision of “The Socialized.Net Embedded” (Tsne) which is the embedded version of Njål Borch’s doctorate “The Socialized.Net”. Tsne is a P2P file sharing application which builds it private P2P network as an Ad-Hoc or Distributed Transient Network. Tsnecv focuses on applying different levels of security to the network with respect to authentication of peers and access to resources, primarily through the use of public key cryptography and assignment of varying trust to peers that meet in the network. The goal is to establish secure authenticated communications in such a way that peers may be assigned different policies with respect to access of files and resources, and in this way introduce different levels, or rather grade the security and trust of other peers. An exiting feature is the possibility to use a wireless device to perform a search among the files of all your friends’ and friends’ friends, or other people you have passed by, and automatically having your living room media PC stream the live audio. Files are accessed based on user groups. Someone who forms an Ad-Hoc (spontaneous) network with your wlan unit while passing you by, may autonomously assign you a low trust level, and thus probably access to few or no files. Your close friends however, may grant you access to everything but their most private files. An important aspect was attempting a transparent integration between Tsne and the new levels of security and the mechanisms used to obtain them. It was attempted to inconvenience the users as little as possible, while keeping the accessibility of available resources as high as possible for all peers, while still allowing as much control as possible. Not only is it important to be able to grade the security at different levels, but it would be nice if users did not have to stop and ask each other for passwords, keys, secrets or to carry memory sticks in case they meet someone new and interesting. In other words, to keep the autonomy as intact as possible and the resources plentiful while allowing peers to control access to their shared resources. Public (as in asymmetric) key encryption was the choice of tool to achieve authentication of nodes. Web Of Trust was used as a starting point for the exchange of keys, but Tsnecv grades both nodes and networks at different levels of security, so in some cases you may meet someone new and exchange a key autonomously and publicly, but still consider the security of the key and the association of an identity to the key strong enough to securely authenticate a peer at a later time. Keywords: P2P private peer-to-peer trust security access authentication URI: http://hdl.handle.net/10037/1197 File(s) in this item: 2
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Gironi, Lorenzo (Master thesis; Mastergradsoppgave, 01-Jun-2011)[+][-]
Abstract: Hospital's communication infrastructure suffers from different types of common problems. Currently, this infrastructure relies mainly on the use of pagers which are devices particularly interruptive for the daily work of hospital's workers, and moreover they do not support context-awareness communication. Wireless phones are supposed to be a valid alternative to pagers and they can also be used to efficiently increase awareness between workers. Unfortunately, wireless phones can become more interruptive than pagers due to the synchronous communication channel they provide. The aim of this thesis is to propose an implementation of a context-aware solution, based on an Ascom/trixbox communication platform, which tries to overcome this problem. In particular it is specifically designed to balance availability and interruptions gained by using the Ascom wireless phones considering contextual information relating to the users carrying these devices, and it provides several features useful to increase awareness. This work is based on an on-going research project at the Norwegian Centre for Integrated Care and Telemedicine (NST), in collaboration with the University Hospital of Northern Norway (UNN) and Telenor. The focus of this project, named Context sensitive systems for mobile communication in hospitals is to design and develop context-sensitive interfaces, middleware and new interaction forms for mobile devices that support multi-modal communication. URI: http://hdl.handle.net/10037/3525 File(s) in this item: 1
thesis.pdf (1.499Mb) -
Gjerdrum, Anders Tungeland (Master thesis; Mastergradsoppgave, 06-Jul-2012)[+][-]
Abstract: The advent of cloud computing alongside with pervasive form factors such as smart devices, introduces a new meaning to asymmetric system models. These new clients act as a presentational layer alleviating much of the computational and storage concerns to cloud services. The application platforms associated with these creates new opportunities for third party developers to provide domain specific applications (apps) to smart devices. Restricted interaction surfaces on smart device introduce new challenges to how apps are managed on these. Moreover, for security purposes as well as strict resource requirements, apps running in these environments are commonly subject to very strict isolation. We conjure that there are benefits with allowing automatic configuration apps onto a client system. Furthermore, we suggest that integration between apps residing at the same host, as well as different hosts, is beneficial to system functionality. By enabling this we could alleviate much of the interaction necessary for users and reduce the time consumed in using such smart devices. The concrete asymmetric system explored in this thesis is the Windows 8 app platform. This platform poses several hindrances to our conjecture. For security reasons, automatic configuration of apps onto a client system is prohibited. Apps run inside a sandboxed environment where they are isolated from the system and other apps. Access to resources is prohibited unless explicitly allowed by the user. As a consequence, communication between apps is forbidden. This is further complicated by the fact that apps in this environment are suspended when not in use. This thesis introduces Javza, a runtime to support dynamic app configuration and integration in Windows 8. Javza provides support for automatic installment of apps based on simplified contextual information. Furthermore, it provides app integration by allowing apps to share data, both within the same and across different systems. We present and evaluate the associated performance costs of deploying Javza inside a Windows 8 environment. We further evaluate the applicability of Javza by implementing a specific use case involving collaborative search. Lastly we discuss some of the security implications associated with our design, and some future improvements in Windows 8 to support our conjecture. URI: http://hdl.handle.net/10037/4397 File(s) in this item: 1
thesis.pdf (6.409Mb) -
Grammeltvedt, Åsmund (Master thesis; Mastergradsoppgave, 01-Jun-2006)[+][-]
Abstract: Computer games with distributed functionality, such as most modern multiplayer games, provide a rich environment in which one can experiment with high performance distribution of computational and graphical resources. Their extremely high requirements for processing power and consistent visual output create a platform with unique demands. Current tiled display walls provide, as a consequence of their architecture, a large amount of computational resources in the form of a networked cluster of computers, driving the individual tiles. Existing forays into creating games intended for display walls have unfortunately made little use of this power, opting instead to centralise computation on a single host and distributing the resulting graphical information, or by running the same computations on all hosts and displaying different parts of the locally generated information. We seek to remedy this situation by distributing computation and visualisation in order to exploit available resources to a greater degree. Achieving a higher level of resource utilisation will allow increasing the complexity of games to involve larger environments with more interactive entities than on comparative single host systems. These are approaches that are used to some degree in Massively Multiplayer Online Games, though rarely with the same focus on distribution or the same demands for visual consistency between adjoining tiles that on a display wall. This thesis discusses techniques for determining and distributing a continually evolving set of information to a cluster of heterogeneous hosts connected by a network. The hosts will be able to simulate a set of mobile entities, where all entities on all hosts share a single virtual environment in which they can interact with each other while keeping a shared and consistent view of the world state. furthermore, the approach is tailored to visualisation on a display wall. To avoid having to design games specifically for the distributed system presented herein, a library is introduced as a method of removing all distribution-related responsibilities from the game itself, as long as the game supports a simple common interface and a limited set of callbacks for the library to modify the game. Do demonstrate the feasibility of this approach and study some of its properties, the Frag library is implemented as a prototype according to the specified design. An ordinary computer game is modified to use Frag, after which the system is tested and measured, leading to comparisons between the original and the Frag-enabled game in terms of scalability in game complexity, in addition to observations about the suitability of the approach. URI: http://hdl.handle.net/10037/232 File(s) in this item: 1
thesis.pdf (1.103Mb) -
Guirao Aguilar, Julian (Master thesis; Mastergradsoppgave, 01-Jun-2010)[+][-]
Abstract: INTRODUCTION: Respiration exercises are an important part of the pulmonary rehabilitation in COPD (chronic obstructive pulmonary disease) patients. Furthermore, there is evidence that showing feedback about their respiration pattern helps them to improve their breathing skills. This study tests the feasibility of monitoring respiration using the Wiimote's infrared camera and showing BPM (breaths per minute) as feedback. A summary of the challenges addressed to achieve such a solution can also be found here. METHODS: A prototype was developed in order to study the viability of using the Wiimote to capture the breathing rate for creating applications to provide guidance to patients. RESULTS: The system implemented was able to acquire breathing data and provide feedback to the patient consisting in its breaths per minute. It is a non-invasive, low cost system, composed of a normal computer, a Wiimote, some markers and an infrared illuminator. It is also a comfortable solution without wires, batteries or any kind of electronics, the patients only wear passive markers. DISCUSSION: Despite the system was able to acquire breathing, it has some important limitations. The user has to be as immobile as it can, otherwise the system will fail. Some other issues found are discussed for future work. Although there exist these problems, the prototype had good outcomes when the subjects were resting of their exercise. They presented less than 15% of maximum error and the RMSE was lower than 6% in all the tests. This study establishes the basis to develop a Wiimote-based system to acquire respiration signals and present feedback or game-based rehabilitation. URI: http://hdl.handle.net/10037/2621 File(s) in this item: 1
thesis.pdf (2.352Mb) -
Hansen, Roger Bruun Asp (Master thesis; Mastergradsoppgave, 18-Dec-2012)[+][-]
Abstract: Video is dominating consumer internet traffic. Restless internet users expect smooth playback and low latency when watching video content and vendors risk losing customers if this cannot be provided. Distributed storage systems specialized for delivering video content and for handling the high traffic this lead to, have been developed over many years. This thesis look into building and deploying a distributed video storage to deliver video content to an enterprise sport analytics web interface using open source solutions. We look into properties such as horizontal scalability, fault tolerance, security and privacy to outline an architecture that can scale horizontally and deliver video content in an efficient way to a HTML5 web interface. Our conjecture is that developing such a distributed storage solution from scratch is not feasible, and that other, accessible, storage solutions should be evaluated. We ended up with deploying OpenStack Object Storage on our cluster, integrating it with the web front end for uploading, managing and accessing video content. Our experiments test and evaluate the performance and boundaries of our system. We also discuss elasticity problems related to sudden spikes in interest, and solutions in the context of privacy and economic issues. The final deployed video storage system has replaced an old centralized approach that previously has been used. It is currently in production delivering video content to a web interface that is used for soccer analytics by our sport partner Tromsø IL. A case study has been made to observe how they have been using our systems for the last year. URI: http://hdl.handle.net/10037/5163 File(s) in this item: 1
thesis.pdf (1.705Mb) -
Hanssen, Harald Sømnes (Master thesis; Mastergradsoppgave, 27-Jan-2008)[+][-]
Abstract: Argos is a middleware platform developed at the ArticBeans lab at the University of Tromsø. The purpose of Argos is to provide a personal application platform for custom services. In this thesis we look at how Bluetooth devices along with Argos can be combined to create an application for encouraging and motivating physical activity. Physical activity is steadily decreasing among the population. People are getting more and more unhealthy due to lack of exercise. Playing computer games or watching television is rather normal today, going outside for a walk is something people seldom do. If a person wants to break the habit of sitting still, he will struggle with breaking the habit and committing to the new lifestyle. A person might have a higher chance of success, if he has something to remind him to exercise at a certain time of the day. The most common reason for failing to break a habit, can be due to lack of reinforcement of the new lifestyle. Having a personal application which allows the person to control his exercise, and also lets him see how much he has achieved, might prove both motivating and encouraging to continue to be more active. URI: http://hdl.handle.net/10037/1411 File(s) in this item: 2
Thesis.pdf (825.7Kb)thesis.zip (33.16Mb) -
Heimdal, Tord-Arne (Master thesis; Mastergradsoppgave, 18-Dec-2009)[+][-]
Abstract: Live video search is emerging as a platform for multimedia production and entertainment service. Such systems rely on a stream of live video and metadata describing the video content. A high quality source for such metadata can be found on the web. Identifying and extracting metadata from web pages can be done by crawling and scraping. However, general crawler politeness rules limit per-site polling frequency, and therefore the freshness of the retrieved data is also limited. % our solution In this thesis we present a metadata extraction system capable of combining high metadata freshness, while at the same time adhering to polling politeness rules. To achieve this, the proposed solution uses a pool of web sources containing overlapping information scheduled in a round-robin fashion. % evaluation Our experiments and analysis show that our system is capable of keeping the average metadata freshness higher than any single-source solution, while at the same time adhere to polling politeness rules. URI: http://hdl.handle.net/10037/2400 File(s) in this item: 1
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Henriksen, André (Master thesis; Mastergradsoppgave, 15-Dec-2003)[+][-]
Abstract: Denne oppgaven ser på mulighetene for å bruke kontekstinformasjon for å kunne tilpasse interaksjonsmodi mot mobile terminaler, spesielt mobiltelefoner. Hensikten er å illustrere hvordan brukere av et transportselskap automatisk kan motta beskjeder om forsinkelser på bussavganger han/hun er interessert i, samt andre beskjeder fra transportselskapet. Brukere skal altså slippe å kjenne til vanlige rutetider. På denne måten blir tjenesten skreddersydd for hver enkelt bruker. Kontekst som identitiet, lokasjon, situasjon og tid brukes for å avgjøre hvilket interaksjonsmodus som skal benyttes. Interaksjonsmodi som ses på i denne oppgaven er SMS og J2ME. Transportsystemet spesifiseres og designes i sin helhet, men kun en demonstrator utvikles. Demonstratoren er utviklet for å fungere på en Sony Ericsson P800, men andre telefoner vil også fungere. Demonstratoren utvikles for å vise at det er mulig å bruke kontekstinformasjon for å avgjøre hvilket interaksjonsmodus som skal benyttes. I demonstratoren er kun J2ME brukt som interaksjonsmodus, mens SMS som interaksjonsmodus ikke er implementert. URI: http://hdl.handle.net/10037/290 File(s) in this item: 1
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Henriksen, Torje Starbo (Master thesis; Mastergradsoppgave, 15-Oct-2008)[+][-]
Abstract: The microprocessor industry has reached limitations of sequential processing power due to power-efficiency and heat problems. With the integrated-circuit technology moving forward, chip-multithreading has become the trend, increasing parallel processing power. The shift of focus has resulted in the vast majority of supercomputers having chip-multiprocessors. While the high performance computing community has long written parallel applications using libraries such as MPI, the performance-characteristics have changed from the traditional uni-core cluster, to the current generation of multi-core clusters; more communication is between processes on the same node, and processes run on cores sharing hardware resources, such as cache and memory bus. We explore the possibilities of optimizing a widely used MPI implementation, Open MPI, to minimize communication overhead for communication between processes running on a single node. We take three approaches for optimization: First we measure the message-passing latency between the different cores, and reduce latency for large messages by keeping the sender and receiver synchronized. Second, we increase scalability by using two new queue-designs, reducing the number of communication queues that need to be polled to receive messages. Third, we experiment with mapping a parallel application to different cores, using only a single node. The mapping is done dynamically during runtime, with no prior knowledge of the application's communication pattern. Our results show that for large messages sent between cores sharing cache, message-passing latency can be significantly reduced. Results from running the NAS Parallel Benchmarks using the new queue-designs show that Open MPI can increase its scalability when running more than 64 processes on a single node. Our dynamic mapper performs close to our manual mapping, but rarely increases performance. We see from the experimental results, that the three techniques give performance increase in different scenarios. Combining techniques like these with other techniques, can be a key to unlocking the parallel performance for a broader range of parallel applications. URI: http://hdl.handle.net/10037/1735 File(s) in this item: 1
thesis.pdf (1.830Mb) -
Holmstad, Øyvind (Master thesis; Mastergradsoppgave, 01-Jun-2011)[+][-]
Abstract: Real-time media rich applications rely on live streams of rich and accurate meta-data describing the video content to provide personal user experiences. Unfortunately, the general amount of video meta-data today is often limited to titles, synopsis and a few keywords. A wildly used approach for extraction of meta-data from video is computer vision. It has been developed a number of different video processing algorithms which can analyse and retrieve useful data from video. However, the computational cost of current computer vision algorithms is considerable. This thesis presents a software architecture that aims to enable real-time annotation of multiple live video streams. The architecture is intended for use within media rich applications where extraction of video semantics in real-time is necessary. Our conjecture was that staging video processing in levels will make room for a more scalable video annotation system. To evaluate our thesis we have developed the prototype runtime Árvdadus. Our experiments show that staged processing can decrease the computation time of meta-data extraction. The evaluation of the architecture suggests that the architecture is applicable in a wide range of domains where extraction of meta-data in real-time is necessary URI: http://hdl.handle.net/10037/3520 File(s) in this item: 1
thesis.pdf (1.715Mb) -
Jakobsen, Børge (Master thesis; Mastergradsoppgave, 08-Jan-2010)[+][-]
Abstract: Digital photographing has become more and more popular as cameras and mobile phones get more advanced and have newer technology embedded. Manually searching in these growing image collections is problematic because of missing context information related to the image itself. If related context information could be added as an automated process, it could help the user view and locate images and information about the image. In this thesis I purpose a system that tries to collect relevant context information connected to an image using time and date, gps location and a user given image category taken with a Nokia N95 using mobile image capturing software like described in [1]. URI: http://hdl.handle.net/10037/2443 File(s) in this item: 1
thesis.pdf (2.295Mb) -
Jakobsen, Oleg (Master thesis; Mastergradsoppgave, 15-Jun-2007)[+][-]
Abstract: Subversion, an open-source centralized version control system, developed by CoallabNet, is currently the second most popular version control system, after the ever popular CVS. Like CVS, Subversion uses a client-server architecture, but has a cleaner, modular architecture. One set of subversion modules, are the filesystem backends modules of subversion. Two ``official'' backends are currently supplied with subversion, a berkleyDB based backend(bdb), and a custom filebased filesystem implementation (fsfs). At least another un-official backend module using an SQL-database exists. Pesto is a secure, decentralized, distributed peer-to-peer storage system, implemented both as a NetBSD filesystem, and as middelware, a portable C-library (libpesto). Currently two applications using libpesto have been written, a C\#\/.Net windows client, and a highly scalable serverfarm for Pesto, written in Java. In this project we integrate subversion with pesto, by creating a new filesystem backend for subversion using libpesto. The result is a version-control system, that works like a centralized version-control system, but has decentralized storage. We show that this system can be used for backup, mirroring of repositories, and as a decentralized version-control system. URI: http://hdl.handle.net/10037/1174 File(s) in this item: 2
CD.zip (25.75Mb)thesis.pdf (719.5Kb) -
Jakobsen, Tom Arild (Master thesis; Mastergradsoppgave, 07-Jan-2008)[+][-]
Abstract: Argos is a middleware platform developed at the University of Tromsø. It provides tailored, flexible and extensible middleware support. In this thesis we suggest a new approach to creating user services for Argos by using a rule engine to setup the program flow for components in Argos. The users are provided with a graphical tool where they can set up rules that can trigger an action. The input, called a fact, to the rule and the action that is triggered has to be picked from the methods of the components in Argos. These fact/ action-methods are component methods annotated with fact/action annotation which is part of the created rule engine system service for Argos. The created rule engine system service also provides an API that is available to all programmers that want to use rules in their Argos components. There are many advantages to expressing functionality trough rules opposed to conventional declarative programming. By only telling the program what to do and not how to do it, rules are more easily understood by humans. This can benefit both the experienced programmer and the non-technical partner in a project. Lifestyle diseases are a growing problem in Western Europe and North-America. An application, realized trough the rule editor tool, for monitoring a user’s activity and give feedback will also be presented. URI: http://hdl.handle.net/10037/1409 File(s) in this item: 2
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