Web-based Platform For Collaborative Medical Imaging Research

Medical imaging research depends basically on the availability of large image collections, image processing and analysis algorithms, hardware and a multidisciplinary research team. It has to be reproducible, free of errors, fast, accessible through a large variety of devices spread around research centers and conducted simultaneously by a multidisciplinary team. Therefore, we propose a collaborative research environment, named Adessowiki, where tools and datasets are integrated and readily available in the Internet through a web browser. Moreover, processing history and all intermediate results are stored and displayed in automatic generated web pages for each object in the research project or clinical study. It requires no installation or configuration from the client side and offers centralized tools and specialized hardware resources, since processing takes place in the cloud.941

Contribution Barriers to Open Source Projects

Contribution barriers are properties of Free/Libre and Open Source Software (FLOSS) projects that may prevent newcomers from contributing. Contribution barriers can be seen as forces that oppose the motivations of newcomers. While there is extensive research on the motivation of FLOSS developers, little is known about contribution barriers. However, a steady influx of new developers is connected to the success of a FLOSS project. The first part of this thesis adds two surveys to the existing research that target contribution barriers and motivations of newcomers. The first exploratory survey provides the indications to formulate research hypotheses for the second main survey with 117 responses from newcomers in the two FLOSS projects Mozilla and GNOME. The results lead to an assessment of the importance of the identified contribution barriers and to a new model of the joining process that allows the identification of subgroups of newcomers affected by specific contribution barriers. The second part of the thesis uses the pattern concept to externalize knowledge about techniques lowering contribution barriers. This includes a complete categorization of the existing work on FLOSS patterns and the first empirical evaluation of these FLOSS patterns and their relationships. The thesis contains six FLOSS patterns that lower specific important contribution barriers identified in the surveys. Wikis are web-based systems that allow its users to modify the wiki's contents. They found on wiki principles with which they minimize contribution barriers. The last part of the thesis explores whether a wiki, whose content is usually natural text, can also be used for software development. Such a Wiki Development Environment (WikiDE) must fulfill the requirements of both an Integrated Development Environment (IDE) and a wiki. The simultaneous compliance of both sets of requirements imposes special challenges. The thesis describes an adapted contribution process supported by an architecture concept that solves these challenges. Two components of a WikiDE are discussed in detail. Each of them helps to lower a contribution barrier. A Proof of Concept (PoC) realization demonstrates the feasibility of the concept

Adessowiki - Collaborative Platform For Writing Executable Papers

Adessowiki is a collaborative platform for scientific programming and document writing. It is a wiki environment that carries simultaneously documentation, programming code and results of its execution without any software configuration such as compilers, libraries and special tools at the client side. This combination of a collaborative wiki environment, central server and execution of code at rendering time enables the use of Adessowiki as an executable paper platform, since it fulfills the need to disseminate, validate, and archive research data. © 2011 Published by Elsevier Ltd.4759767Elsevier B.V.,University Tsukuba, Center for Computational SciencesKnuth, D.E., Literate programming (1984) Comput. J., 27 (2), pp. 97-111Buckheit, J., Donoho, D.L., (1995) Wavelab and Reproducible Research, pp. 55-81. , Springer-VerlagLotufo, R.A., Machado, R.C., Korbes, A., Ramos, R.G., WikiSym'09: Proceedings of the 5th International Symposium on Wikis and Open Collaboration, , New York, NY, USAO'Reilly, T., What Is Web 2.0? Design Patterns and Business Models for the Next Generation of Software, , http://oreillynet.com/pub/a/oreilly/tim/news/2005/09/30/what-is-web-20. html, URLKorbes, A., De Alencar Lotufo, R., Analysis of the watershed algorithms based on the breadth-first and depth-first exploring methods (2009) Graphics, Patterns and Images, SIBGRAPI Conference on, pp. 133-140. , Vol. 0, IEEE Computer Society, Los Alamitos, CA, USAKorbes, A., De Alencar Lotufo, R., On watershed transform: Plateau treatment and influence of the different definitions in real applications (2010) Systems, Signals and Image Processing, Proceedings of 17th International Conference on, pp. 376-379. , Vol. 0, Rio de Janeiro, BrazilVitor, A.K.G., Ferreira, J.V., Fast image segmentation by watershed transform on graphical hardware (2009) Proceedings of 30th CILAMCEKorbes, A., (2010) Analise de Algoritmos da Transformada Watershed, , Ph.D. thesis, FEEC, State University of Campinas (March)Lotufo, A.S.R.M.R.A., Audigier, R., Morphological processing Microscope Image Processing, , F. M. Qiang WU, K. R. CASTLEMAN (Eds.), Ch. 8Lotufo, R., Rittner, L., Audigier, R., Saude, A., Machado, R., Morphological image processing apllied in medicine (2011) Biomedical Image Processing - Methods and Applications, pp. 107-128. , T. Deserno (Ed.), Springer-Verlag, Berlin, Ch.