With the growing interest in software defined radios (SDRs), cognitive radios, the Joint Tactical Radio System (JTRS), and the Software Communication Architecture (SCA) comes the need for a rapid prototyping approach to radio design. In the past, radios have traditionally been designed to have a static implementation with the express goal of implementing a specific type of communication, such as 802.11b, CDMA voice communication, or just a simple FM tuner. However, when designing an SDR, the developer must not only be able to understand the radio engineering aspects of the design, but also be able to interface correctly with the underlying core software framework. This added software complexity, along with the general need for faster, more economical waveform development, illuminates the need for a rapid prototyping SDR development environment. This thesis takes a fresh look at the task of providing radio designers with a functional, straightforward design tool that enables the developer to focus more on the radio design than the tedious task of interacting with CORBA, IDL, and the SCA Core Framework. The design approach used to create such a tool is investigated along with an overview of general SDR concepts and an introduction to MPRG's open source SCA Core Framework, OSSIE. Discussion on the design methodology behind creating an SCA waveform is provided and the final result of this research, OSSIE Waveform Developer (OWD), is introduced and explored in detail. The code generated using OWD is detailed and waveform design approaches are presented with some suggested modifications. Finally, the improvements gained by using OSSIE Waveform Developer instead of the traditional approach of manually developing waveforms are presented. / Master of Science

The thesis is focused on the development of JSF framework providing components for complex data visualizations. Its objective consists of the implementation of the API for creating JSF components rendering complex charts based on the JavaScript library C3.js and subsequent implementation of a set of chart components using this API. The contribution of this thesis is a library providing a tool for creating new JSF components based on C3.js together with a set of ready to use components. It begins with research of relevant JSF libraries, following with API analysis and design. Based on that is API implemented, in which a component set is then created. As a part of this work is a user guide, API reference guide and presentation web of implemented components.

<p>Nowadays, Dynamic Geometry Software (DGS) is widely accepted as a tool for creating and presenting visually rich interactive teaching and learning materials, called dynamic drawings. Dynamic drawings are specified by writing expressions in functional domain-specific languages. Due to wide acceptance of DGS, there has arisen a need for their extensibility, by adding new semantics and visual objects (visuals). We have developed a programming framework for the Dynamic Geometry Software, SLGeometry, with a genericized functional language and corresponding expression evaluator that act as a framework into which specific semantics is embedded in the form of code annotated with metadata. The framework transforms an ordinary expression tree evaluator into an object-oriented one, and provide guidelines and examples for creation of interactive objects with dynamic properties, which participate in evaluation optimization at run-time. Whereas other DGS are based on purely functional expression evaluators, our solution has advantages of being more general, easy to implement, and providing a natural way of specifying object properties in the user interface, minimizing typing and syntax errors.LGeometry is implemented in C# on the .NET Framework. Although attributes are a preferred mechanism to provide association of declarative information with C# code, they have certain restrictions which limit their application to representing complex structured metadata. By developing a metadata infrastructure which is independent of attributes, we were able to overcome these limitations. Our solution, presented in this&nbsp; dissertation, provides extensibility to simple and complex data types, unary and binary operations, type conversions, functions and visuals, thus enabling developers to seamlessly add new features to SLGeometry by implementing them as C# classes annotated with metadata. It also provides insight into the way a domain specific functional language of dynamic geometry software can be genericized and customized for specific needs by extending or restricting the set of types, operations, type conversions, functions and visuals.Furthermore, we have conducted&nbsp; experiments with several groups of students of mathematics and high school pupils, in order to test how our approach compares to the existing practice. The experimental subjects tested mathematical games using interactive visual controls (UI controls) and sequential behavior controllers. Finally, we present a new evaluation algorithm, which was compared to the usual approach employed in DGS and found to perform well, introducing advantages while maintaining the same level of performance.</p> / <p>U dana&scaron;nje vreme softver za dinamičku geometriju (DGS) je &scaron;iroko prihvaćen kao alat za kreiranje i prezentovanje vizuelno bogatih interaktivnih nastavnih materijala i materijala za samostalno učenje, nazvanih dinamičkim crtežima. Kako je raslo prihvatanje softvera za dinamičku geometriju, tako je i rasla potreba da se oni pro&scaron;iruju, dodajući im novu semantiku i vizualne objekte. Razvili smo programsko okruženje za softver za dinamičku geometriju, SLGeometry, sa generičkim&nbsp; funkcionalnim jezikom i odgovarajućim evaluatorom izraza koji čini okruženje u kom su ugrađene specifične semantike u obliku koda označenog metapodacima. Ovo okruženje pretvara uobičajen evaluator stabla izraza u objektno orijentiran, te daje uputstva i primere za stvaranje interaktivnih objekata sa dinamičkim osobinama, koji sudeluju u optimizaciji izvr&scaron;enja tokom izvođenja. Dok se drugi DGS-ovi temelje na čisto funkcionalnim evaluatorima izraza, na&scaron;e rje&scaron;enje ima prednosti jer je uop&scaron;tenije, lako za implementaciju i pruža prirodan način navođenja osobina objekta u korisničkom interfejsu, minimizirajući kucanje i sintaksne gre&scaron;ke. SLGeometry je implementirana u jeziku C# .NET Framework-a. Iako su atributi preferiran mehanizam, koji povezuje C# k&ocirc;d sa deklarativnim informacijama, oni imaju određena ograničenja koja limitiraju njihovu primenu za predstavljanje složenih strukturiranih metapodataka. Razvijanjem infrastrukture metapodataka koja je nezavisna od atributa, uspeli smo prevladati ta ograničenja. Na&scaron;e re&scaron;enje, predstavljeno u ovoj disertaciji, pruža pro&scaron;irivost: jednostavnim i složenim vrstama podataka, unarnim i binarnim operacijama, konverzijama tipova, funkcijama i vizuelnim objektima, omogućavajući&nbsp; time programerima da neprimetno dodaju nove osobine u SLGeometry&nbsp; implementirajući ih kao C# klase označene metapodacima.</p>