Java Mobile Media API porting in Symbian Operating System

Työssä tutkitaan, kuinka Symbian käyttöjärjestelmälle voidaan tehdä siirrettäviä ohjelmia. Työssä käydään läpi menetelmiä, jotka helpottavat ohjelmistojen siirrettävyyttä uudelle alustalle. Uuteen älypuhelimeen voi tulla monia uusia komponentteja. Laite voi muuttua piiritasolla, käyttöjärjestelmästä voi tulla uusi versio sekä siirrettävästä ohjelmasta voi tulla uusi versio. Kaikki nämä vaikuttavat ohjelman siirrettävyyteen. Työssä tehtiin Java-rajapinnan siirto uudelle alustalle. Prosessin aikana löydettiin tärkeitä tekijöitä, jotka vaikuttavat ohjelmiston siirrettävyyteen. Siirrettävyys sinänsä pitäisi ottaa huomioon ohjelmistoprosessin jokaisessa vaiheessa. Älypuhelimista tulee jatkuvasti uusia versioita. Tämä tekee ohjelmien siirrettävyydestä hyvin tärkeän tekijän ohjelmistojen suunnittelussa. Hyvin suunniteltu ohjelma on helpompi ylläpitää, päivättää ja siirtää myöhemmin.

Omeka-DSpace REST API Harvester

Poster at Open Repositories 2014, Helsinki, Finland, June 9-13, 2014

DSpace REST API: an Interface for Reusing DSpace Content, and Practical Applications

Presentation at Open Repositories 2014, Helsinki, Finland, June 9-13, 2014

SimpleREST -RESTful DSpace API

Poster at Open Repositories 2014, Helsinki, Finland, June 9-13, 2014

Implementing NX Remote Desktop technology in the LTSP system

This project focuses on studying and testing the benefits of the NX Remote Desktop technology in administrative use for Finnish Meteorological Institutes existing Linux Terminal Service Project environment. This was done due to the criticality of the system caused by growing number of users as the Linux Terminal Service Project system expands. Although many of the supporting tasks can be done via Secure Shell connection, testing graphical programs or desktop behaviour in such a way is impossible. At first basic technologies behind the NX Remote Desktop were studied, and after that started the testing of two possible programs, FreeNX and NoMachine NX server. Testing the functionality and bandwidth demands were first done in a closed local area network, and results were studied. The better candidate was then installed in a virtual server simulating actual Linux Terminal Service Project server at Finnish Meteorological Institute and connection from Internet was tested to see was there any problems with firewalls and security policies. The results are reported in this study. Studying and testing the two different candidates of NX Remote Desktop showed, that NoMachine NX Server provides better customer support and documentation. Security aspects of the Finnish Meteorological Institute had also to be considered, and since updates along with the new developing tools are announced in next version of the program, this version was the choice. Studies also show that even NoMachine promises a swift connection over an average of 20Kbit/s bandwidth, at least double of that is needed. This project gives an overview of available remote desktop products along their benefits. NX Remote Desktop technology is studied, and installation instructions are included. Testing is done in both, closed and the actual environment and problems and suggestions are studied and analyzed. The installation to the actual LTSP server is not yet made, but a virtual server is put up in the same place in the view of network topology. This ensures, that if the administrators are satisfied with the system, installation and setting up the system will go as described in this report.

Mobiilisovelluskehys

Tämän insinöörityön tarkoituksena oli kehittää mahdollisimman helposti laajennettava sovelluskehys A4SP Technologies Oy:n käyttöön osana ohjelmointiprojektia, johon liittyy useasta osasta koostuvan mobiilisovelluskokonaisuuden kehittäminen. Tarkoituksena oli saada aikaan sovelluskehys, jota kaikki sovellukset käyttäisivät runkonaan ja joka olisi riittävän monipuolinen, jotta sille voitaisiin perustaa myös mahdolliset tulevat sovellukset. Työssä käydään läpi projektin suunnittelulähtökohtia, lopputuloksena aikaansaatu sovelluskehys siinä käytettyine suunnitelumalleineen sekä käytännön kokemuksia oikeista mobiililaitteista. Erityisesti työhön liittyvät Bluetooth API (JSR 82), Mobile Media API (JSR 135), verkkoyhteydet mobiililaitteista, käyttöliittymän suunnittelu sekä RMS. Lopputuloksena saatiin aikaan määrittelyt täyttävä sovelluskehys, joka soveltuu Bluetoothyhteyttä käyttäviin sovelluksiin joiden käyttöliittymän voidaan katsoa koostuvat erillisistä komponenteista. Kehys tukee sovelluksia, jotka lähettävät dataa käyttäen HTTPprotokollaa sekä sovelluksia joiden tarvitsee lukea ja tallentaa erityyppistä dataa käyttäen RMS:ää. Lisäksi kehys tarjoaa MMAPIn käyttöön pohjautuvan äänentoistoratkaisun.

Java Specification Request development on a mobile device

Nykyaikaiset Java-teknologiaa sisältävät matkapuhelimet kehittyvät vauhdikkaasti prosessoritehon, muistin määrän sekä uusien käyttöjärjestelmäversioiden tarjoamien ominaisuuksien myötä. Laitteiden näyttöjen koko tulee pysymään pienenä,mutta silti moninaista multimediasisältöä äänen, videon ja kuvan osilta voidaanhuomattavasti parantaa JSR 234:n eli kehittyneen multimedialaajennuksen avulla.Erityisesti edistyneet ääniominaisuudet ovat tervetullut lisä, sillä viime aikojen kehitys matkapuhelimissa on saanut aikaan niiden muuntumisen myös kannettavaksi musiikkisoittimiksi. Diplomityössä JSR 234 -spesifikaation tietty osa kehitettiin ympäristössä, joka koostui Series 60 -ohjelmistoalustankolmannesta versiosta sekä Symbian OS v9.1 käyttöjärjestelmästä. Tuloksena syntynyt Java-rajapinta tarjoaa sovelluskehittäjille yksinkertaisemman lähestymistavan Symbianin efektirajapintaan piilottaen samalla alla olevan käyttöjärjestelmänmonimutkaisuuden. Toteutuksen täytyy olla läpikotaisin testattu, jotta voidaan varmentua sen noudattavan tarkkaan JSR 234 -spesifikaatiota. Työssä on esitelty useita eri testausmenetelmiä tarkoituksena saavuttaa projektissa paras mahdollinen laatu.

Optimizing Mobile Java Location-Based Services in Symbian OS

This thesis evaluates methods for obtaining high performance in applications running on the mobile Java platform. Based on the evaluated methods, an optimization was done to a Java extension API running on top the Symbian operating system. The API provides location-based services for mobile Java applications. As a part of this thesis, the JNI implementation in Symbian OS was also benchmarked. A benchmarking tool was implemented in the analysis phase in order to implement extensive performance test set. Based on the benchmark results, it was noted that the landmarks implementation of the API was performing very slowly with large amounts of data. The existing implementation proved to be very inconvenient for optimization because the early implementers did not take performance and design issues into consideration. A completely new architecture was implemented for the API in order to provide scalable landmark initialization and data extraction by using lazy initialization methods. Additionally, runtime memory consumption was also an important part of the optimization. The improvement proved to be very efficient based on the measurements after the optimization. Most of the common API use cases performed extremely well compared to the old implementation. Performance optimization is an important quality attribute of any piece of software especially in embedded mobile devices. Typically, projects get into trouble with performance because there are no clear performance targets and knowledge how to achieve them. Well-known guidelines and performance models help to achieve good overall performance in Java applications and programming interfaces.

Applications of graph transformation in tools for domain-specific modeling languages

The use of domain-specific languages (DSLs) has been proposed as an approach to cost-e ectively develop families of software systems in a restricted application domain. Domain-specific languages in combination with the accumulated knowledge and experience of previous implementations, can in turn be used to generate new applications with unique sets of requirements. For this reason, DSLs are considered to be an important approach for software reuse. However, the toolset supporting a particular domain-specific language is also domain-specific and is per definition not reusable. Therefore, creating and maintaining a DSL requires additional resources that could be even larger than the savings associated with using them. As a solution, di erent tool frameworks have been proposed to simplify and reduce the cost of developments of DSLs. Developers of tool support for DSLs need to instantiate, customize or configure the framework for a particular DSL. There are di erent approaches for this. An approach is to use an application programming interface (API) and to extend the basic framework using an imperative programming language. An example of a tools which is based on this approach is Eclipse GEF. Another approach is to configure the framework using declarative languages that are independent of the underlying framework implementation. We believe this second approach can bring important benefits as this brings focus to specifying what should the tool be like instead of writing a program specifying how the tool achieves this functionality. In this thesis we explore this second approach. We use graph transformation as the basic approach to customize a domain-specific modeling (DSM) tool framework. The contributions of this thesis includes a comparison of di erent approaches for defining, representing and interchanging software modeling languages and models and a tool architecture for an open domain-specific modeling framework that e ciently integrates several model transformation components and visual editors. We also present several specific algorithms and tool components for DSM framework. These include an approach for graph query based on region operators and the star operator and an approach for reconciling models and diagrams after executing model transformation programs. We exemplify our approach with two case studies MICAS and EFCO. In these studies we show how our experimental modeling tool framework has been used to define tool environments for domain-specific languages.

Construction Plan Image Service for Mobile Devices

The forthcoming media revolution of exchanging paper documents to digital media in construction engineering requires new tools to be developed. The basis of this bachelor’s thesis was to explore the preliminary possibilities of exporting imagery from a Building Information Modelling –software to a mobile phone on a construction yard. This was done by producing a Web Service which uses the design software’s Application Programming Interface to interact with a structures model in order to produce the requested imagery. While mobile phones were found lacking as client devices, because of limited processing power and small displays, the implementation showed that the Tekla Structures API can be used to automatically produce various types of imagery. Web Services can be used to transfer this data to the client. Before further development the needs of the contractor, benefits for the building master and inspector and the full potential of the BIM-software need to be mapped out with surveys.

Apple, Nokia and RIM – Rivalry and Co-operation between Three Mobile Phone Corporations

The purpose of this paper is to gather enough evidence to speculate the future of Nokia, Rim and Apple. The thesis goes over the history, current events and business model of each company. This paper includes differences between the companies and co-operation and rivalry, such as patent infringement cases. The study is limited to smartphones and their future. The result of this study is that Apple will continue its steady increase in market share, while Nokia will first decrease and after the launch of the Windows Phone it will rise again. RIM‟s result has not been as good as in past years and it has lost market share. The decrease of share price may lead to acquisition by a company interested in RIM technology.

Europeana content priorities

David Smithin esitys Europeana työpajassa 20.11.2012 Helsingissä.