Discovering Community Patterns in Open-Source: A Systematic Approach and Its Evaluation

“There can be no vulnerability without risk; there can be no community without vulnerability; there can be no peace, and ultimately no life, without community.” - [M. Scott Peck]The open-source phenomenon has reached the point in which it is virtually impossible to find large applications that do not rely on it. Such grand adoption may turn into a risk if the community regulatory aspects behind open-source work (e.g., contribution guidelines or release schemas) are left implicit and their effect untracked. We advocate the explicit study and automated support of such aspects and propose Yoshi (Y ielding O pen-S ource H ealth I nformation), a tool able to map open-source communities onto community patterns, sets of known organisational and social structure types and characteristics with measurable core attributes. This mapping is beneficial since it allows, for example, (a) further investigation of community health measuring established characteristics from organisations research, (b) reuse of pattern-specific best-practices from the same literature, and (c) diagnosis of organisational anti-patterns specific to open-source, if any. We evaluate the tool in a quantitative empirical study involving 25 open-source communities from GitHub, finding that the tool offers a valuable basis to monitor key community traits behind open-source development and may form an effective combination with web-portals such as OpenHub or Bitergia. We made the proposed tool open source and publicly available.Software Engineerin

Analysis of the European results on the HTTR's core physics benchmarks

In the frame of the European contract HTR-N, a work package is devoted to the code validation and method improvements as far as the high temperature gas-cooled reactor (HTGR) core modelling is concerned. Institutions from three countries are involved in this work package: FZJ in Germany, NRG and IRI in the Netherlands, and CEA in France. The present work is based on a benchmark problem proposed by JAERI through the IAEA. It concerns the HTTR’s start-up core physics experiments that were a good opportunity for the European partners to validate their calculational tools and methods. The number of fuel columns necessary to achieve the first criticality and the excess reactivity for 18, 24, and 30 fuel columns in the core had to be evaluated. Pre-test and post-test calculational results, obtained by the partners, are compared with each other and with the experiment. Parts of the discrepancies between experiment and pre-test predictions are analysed and tackled by different treatments. In the case of the Monte Carlo code TRIPOLI4, used by CEA, the discrepancy between measurement and calculation at the first criticality is reduced to Δk/k∼0.85%, when considering the revised data of the HTTR benchmark [Fujimoto, private communication]. In the case of the diffusion codes, this discrepancy is reduced to Δk/k∼0.8% (FZJ) and 2.7 or 1.8% (CEA).Old - Section Reactor Physic

How Do Community Smells Influence Code Smells?

Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.Software Engineerin

Effects of Orthography on Speech Production in Chinese

The potential role of orthographic representations on spoken word production was investigated with speakers of Chinese, a non-alphabetic and orthographically non-transparent language. Using the response generation procedure, we obtained the well-known facilitation from word-initial phonological overlap, but this effect was unaffected by whether or not responses shared the initial character. In a study which manipulated the visual similarity of the word-initial character, a significant inhibitory effect of orthography was found. However, this effect disappeared when prompt stimuli were presented auditorily, suggesting that the orthographic effect might be attributable to the memorization stage of the response generation task, rather than reflecting processes genuine to speaking. By contrast, a reliable orthographic effect was found in an oral reading task, suggesting that orthography plays a role only when it is relevant to the word production task. Furthermore, the present findings show that the orthographic effect is tied to the correspondence between orthography and phonology of a language when orthography is relevant to the task used