The quality of volunteered geographic information (VGI) is questionable as it emerges through a diversity contributors. reputation contributor increasingly applied to VGI assessment and its assurance. Research on how measure validate reputation, however, still required. This study proposes an evaluation-based weighted PageRank (EWPR) algorithm provide ranking metric reputation. Ranking establis...

Pull-based development has enabled numerous volunteers to contribute open-source projects with fewer barriers. Nevertheless, a considerable amount of pull requests (PRs) valid contributions are abandoned by their contributors, wasting the effort and time put in both contributors maintainers. To better understand underlying dynamics contributor-abandoned PRs, we conduct mixed-methods study using...