Visualizing Modules and Dependencies of OSGi-based Applications

The architecture of software it not tangible; but in different situations it is preferable to have it tangible. For example, while reviewing it against the intended design, introducing the software to others, or starting to develop on a new part. Basic aspects of a software architecture are the modules the software is constructed of and the dependencies between them. To comprehend these aspects is important especially for software using a technology such as OSGi, which key concept is modularization. In this paper, we describe interactive visualization tools that we developed to comprehend OSGi-based applications with their modules and dependencies. We focus on concepts to treat large number of modules and dependencies: navigation, filtering, and selection. We applied our solution for OSGi-based applications with hundreds of modules containing multiple submodules each. With the resulting visualizations, we can explore the modularization of the software architecture

BugMaps-Granger: a tool for visualizing and predicting bugs using Granger causality tests

International audienceBackgroundDespite the increasing number of bug analysis tools for exploring bugs in software systems, there are no tools supporting the investigation of causality relationships between internal quality metrics and bugs. In this paper, we propose an extension of the BugMaps tool called BugMaps-Granger that allows the analysis of source code properties that are more likely to cause bugs. For this purpose, we relied on the Granger Causality Test to evaluate whether past changes to a given time series of source code metrics can be used to forecast changes in a time series of defects. Our tool extracts source code versions from version control platforms, calculates source code metrics and defects time series, computes Granger Test results, and provides interactive visualizations for causal analysis of bugs.ResultsWe provide an example of use of BugMaps-Granger involving data from the Equinox Framework and Eclipse JDT Core systems collected during three years. For these systems, the tool was able to identify the modules with more bugs, the average lifetime and complexity of the bugs, and the source code properties that are more likely to cause bugs.ConclusionsWith the results provided by the tool in hand, a maintainer can perform at least two main software quality assurance activities: (a) refactoring the source code properties that Granger-caused bugs and (b) improving unit tests coverage in classes with more bugs

Software for Visualization and Coordination of the Distributed Simulation Modeling Process

Simulation modeling projects commonly involve distributed team collaboration. It is currently difficult to perform collaboration in distributed modeling process for two reasons: 1) Simulation modeling in general requires modelers to manage complexities (such as tracking model revisions, recording scenario assumptions and organizing external artifacts) related to the model. 2) Distributed collaboration requires collaborators to maintain change awareness. While proper information technology support is known to lessen the difficulties of collaborations, there is limited software support for complexity management in generic modeling process and change awareness in distributed collaboration, therefore require tremendous amount of effort in management and communication. This thesis describes a new system that supports distributed modeling process. The system provides modeling repositories to help manage modeling complexities and a visual workspace to provide change awareness information. The system has been shown to substantially reduce modeling effort in distributed modeling, is extensible and easy to use

Advances in Telecare over The Past Ten Years

This article reviews advances during the past decade or so in telecare (ie, computer-supported social care at home). The need for telecare is discussed along with how it relates to social and health care. The expected benefits of telecare are also discussed. The evolution of telecare technology is reviewed, covering various system generations. The capabilities of present day telecare are covered, along with its advantages, limitations, and barriers to uptake. Recent evaluations and exemplars of telecare are discussed. The user requirements for telecare are presented, complemented by a discussion of the issues in user and professional acceptance. The article concludes with a summary of past developments in telecare and the prospects for the future

Demonstration of Selected Graph Algorithms

Táto práca sa zaoberá úpravou architektúry existujúcej aplikácie pre demonštráciu  a vizualizáciu vybraných grafových algoritmov. Cieľom práce je rozdeliť aplikáciu do viacerých modulov a umožniť ľahšiu rozšíriteľnosť. K modularizácií je využívaná technológia OSGi. Vysvetlené sú jej princípy, ktoré sú následne využité k návrhu a implementácií modulov. V rámci novej architektúry je implementovaná podpora viacjazyčnosti programu využitím Eclipse Plugin internacionalizácie. Pri tvorbe modulov grafových algoritmov sú využívané OSGi služby, pomocou ktorých je možné do programu dynamicky pridávať moduly a registrovať ich služby počas behu programu. Implementácia zahŕňa aj tvorbu nových modulov pre Primov, Kruskalov, Edmondsov Karpov a upravený Hierholzerov algoritmus. Beh simulácií nových algoritmov je otestovaný na sade vytvorených grafov.This thesis deals with re-architecture of an existing application for the demonstration and visualization of selected graph algorithms. The goal of this thesis is to convert the application into multiple modules and make it easier to extend. OSGi technology helps to achieve the modularity. Its principles are explained and used to design and implementation of modules. With new architecture is also implemented the support for multilingual user interface using Eclipse Plugin internationalization. Graph algorithms represented as modules use OSGi Services. Dynamicity is ensured by installing the module and registering its service during the program's run time. The implementation also includes the creation of new modules for Prim's, Kruskal's, Edmond Karp's and modified Hierholzer's algorithm.

Ubiquitous Computing

The aim of this book is to give a treatment of the actively developed domain of Ubiquitous computing. Originally proposed by Mark D. Weiser, the concept of Ubiquitous computing enables a real-time global sensing, context-aware informational retrieval, multi-modal interaction with the user and enhanced visualization capabilities. In effect, Ubiquitous computing environments give extremely new and futuristic abilities to look at and interact with our habitat at any time and from anywhere. In that domain, researchers are confronted with many foundational, technological and engineering issues which were not known before. Detailed cross-disciplinary coverage of these issues is really needed today for further progress and widening of application range. This book collects twelve original works of researchers from eleven countries, which are clustered into four sections: Foundations, Security and Privacy, Integration and Middleware, Practical Applications

CHARACTERIZATION AND VALIDATION OF FLOWERING TIME GENES IN A DIVERSITY PANEL OF RICE (Oryza sativa L.)

In order to meet the needs of a growing population, rice production must be doubled by 2050 in comparison to 2005 production levels. However, rice production faces many challenges including rising temperatures, drought, and salinity stress. Flowering is one of the most heat sensitive periods of the rice life cycle, causing significant decreases to yield if temperatures are too high during the flowering process. As an agronomically important trait, days to flowering determines the climate rice varieties can grow in. Days to flowering is highly variable and quantitative in nature with over 30 genes known to control days to flowering. This study aimed to characterize genes controlling days to flowering through a genome wide association study (GWAS), analysis of genetic variation in known flowering time genes, and genome editing of two known flowering time genes. Genotyping of the material used in the GWAS was performed using a rice 7K SNP chip referred to as the Cornell-IR LD Rice Array (C7AIR). The C7AIR successfully distinguished between the five subgroups of Oryza sativa; however, due to all varieties genotyped being inbred, the amount of heterozygosity was low, causing problems with identifying where the heterozygous cluster should fall when creating the custom cluster file in GenomeStudio. The GWAS identified 5 candidate loci which contribute to days to flowering, including a region co-localizing with the known flowering time genes Hd3a and RFT1. The five genes analyzed for structural variation were highly conserved among the varieties observed with no nonsense, and few missense mutations being observed. Guide RNAs were designed to knockout the function of Hd3a and RFT1; however, the ribonucleoprotein (RNP) transfection was unsuccessful due to the need for optimizing the rice protoplast isolation protocol

A generic approach to the evolution of interaction in ubiquitous systems

This dissertation addresses the challenge of the configuration of modern (ubiquitous, context-sensitive, mobile et al.) interactive systems where it is difficult or impossible to predict (i) the resources available for evolution, (ii) the criteria for judging the success of the evolution, and (iii) the degree to which human judgements must be involved in the evaluation process used to determine the configuration. In this thesis a conceptual model of interactive system configuration over time (known as interaction evolution) is presented which relies upon the follow steps; (i) identification of opportunities for change in a system, (ii) reflection on the available configuration alternatives, (iii) decision-making and (iv) implementation, and finally iteration of the process. This conceptual model underpins the development of a dynamic evolution environment based on a notion of configuration evaluation functions (hereafter referred to as evaluation functions) that provides greater flexibility than current solutions and, when supported by appropriate tools, can provide a richer set of evaluation techniques and features that are difficult or impossible to implement in current systems. Specifically this approach has support for changes to the approach, style or mode of use used for configuration - these features may result in more effective systems, less effort involved to configure them and a greater degree of control may be offered to the user. The contributions of this work include; (i) establishing the the need for configuration evolution through a literature review and a motivating case study experiment, (ii) development of a conceptual process model supporting interaction evolution, (iii) development of a model based on the notion of evaluation functions which is shown to support a wide range of interaction configuration approaches, (iv) a characterisation of the configuration evaluation space, followed by (v) an implementation of these ideas used in (vi) a series of longitudinal technology probes and investigations into the approaches