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Summer Fellowship Pays Off in the Form of Published Research Department of Surgery Hosts Twelfth Annual Louis R.M. Del Guercio, M.D., Distinguished Visiting Professorship and Research Day D.P.T. Students Share Their Community Service Projects Department of Pediatrics Hosts Fifth Annual Assistant Professor Pediatric Research Symposium NYMC Serves Up International Food and Handicrafts P2P Committee Recognizes Role Models at NYMChttps://touroscholar.touro.edu/in_touch/1264/thumbnail.jp
Investigating the Impact of Continuous Integration Practices on the Productivity and Quality of Open-Source Projects
Background: Much research has been conducted to investigate the impact of
Continuous Integration (CI) on the productivity and quality of open-source
projects. Most of studies have analyzed the impact of adopting a CI server
service (e.g, Travis-CI) but did not analyze CI sub-practices. Aims: We aim to
evaluate the impact of five CI sub-practices with respect to the productivity
and quality of GitHub open-source projects. Method: We collect CI sub-practices
of 90 relevant open-source projects for a period of 2 years. We use regression
models to analyze whether projects upholding the CI sub-practices are more
productive and/or generate fewer bugs. We also perform a qualitative document
analysis to understand whether CI best practices are related to a higher
quality of projects. Results: Our findings reveal a correlation between the
Build Activity and Commit Activity sub-practices and the number of merged pull
requests. We also observe a correlation between the Build Activity, Build
Health and Time to Fix Broken Builds sub-practices and number of bug-related
issues. The qualitative analysis reveals that projects with the best values for
CI sub-practices face fewer CI-related problems compared to projects that
exhibit the worst values for CI sub-practices. Conclusions: We recommend that
projects should strive to uphold the several CI sub-practices as they can
impact in the productivity and quality of projects.Comment: Paper accepted for publication by The ACM/IEEE International
Symposium on Empirical Software Engineering and Measurement (ESEM
Innovation and research in organic farming: A multiâlevel approach to facilitate cooperation among stakeholders
A wider range of stakeholders is expected to be involved in organic research. A decisionâsupport tool is needed to define priorities and to allocate tasks among institutions. Based on research and management experience in organic research, the authors have developed a framework for experimental and research
projects. The framework is based on a multiâlevel approach. Each level is defined according to the directness of the innovation impact on the organic systems. The projects carried out for each level were assessed over a ten-year period. Two applications are presented: analysis of crop protection strategies in horticulture and plant breeding programmes. When combined with four development models of organic farming, this multiâlevel analysis appears to be promising for defining research agendas
PICES Press, Vol. 18, No. 2, Summer 2010
â˘The 2010 Inter-sessional Science Board Meeting: A Note from the Science Board Chairman (pp. 1-3)
â˘2010 Symposium on âEffects of Climate Change on Fish and Fisheriesâ (pp. 4-11)
â˘2009 Mechanism of North Pacific Low Frequency Variability Workshop (pp. 12-14)
â˘The Fourth China-Japan-Korea GLOBEC/IMBER Symposium (pp. 15-17, 23)
â˘2010 Sendai Ocean Acidification Workshop (pp. 18-19, 31)
â˘2010 Sendai Coupled Climate-to-Fish-to-Fishers Models Workshop (pp. 20-21)
â˘2010 Sendai Salmon Workshop on Climate Change (pp. 22-23)
â˘2010 Sendai Zooplankton Workshop (pp. 24-25, 28)
â˘2010 Sendai Workshop on âNetworking across Global Marine Hotspotsâ (pp. 26-28)
â˘The Ocean, Salmon, Ecology and Forecasting in 2010 (pp. 29, 44)
â˘The State of the Northeast Pacific during the Winter of 2009/2010 (pp. 30-31)
â˘The State of the Western North Pacific in the Second Half of 2009 (pp. 32-33)
â˘The Bering Sea: Current Status and Recent Events (pp. 34-35, 39)
â˘PICES Seafood Safety Project: Guatemala Training Program (pp. 36-39)
â˘The Pacific Ocean Boundary Ecosystem and Climate Study (POBEX) (pp. 40-43)
â˘PICES Calendar (p. 44
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Identifying barriers and opportunities for transitions towards more sustainable agriculture through system analysis: the case of Vereda La Hoya, Colombia
The paper presents the results of studies which investigated farmersâ reasoning and behaviour with
regards to the misâuse of personal protective equipment and pesticide among smallholders in Colombia. First,
the research approach is described. In particular, the structured mental models approach and the integrative
agentâcentred framework are presented. These approaches permit to understand the farmersâ reasoning and
behaviour in a system perspective. Second, the results are summarized. The methods adopted allowed not only
for identifying the factors, but also the social dynamics influencing farmers. Finally, suggestions for
interventions are provided, which are not limited to a technical fix, but address the underlying social causes of
the problem
Too Trivial To Test? An Inverse View on Defect Prediction to Identify Methods with Low Fault Risk
Background. Test resources are usually limited and therefore it is often not
possible to completely test an application before a release. To cope with the
problem of scarce resources, development teams can apply defect prediction to
identify fault-prone code regions. However, defect prediction tends to low
precision in cross-project prediction scenarios.
Aims. We take an inverse view on defect prediction and aim to identify
methods that can be deferred when testing because they contain hardly any
faults due to their code being "trivial". We expect that characteristics of
such methods might be project-independent, so that our approach could improve
cross-project predictions.
Method. We compute code metrics and apply association rule mining to create
rules for identifying methods with low fault risk. We conduct an empirical
study to assess our approach with six Java open-source projects containing
precise fault data at the method level.
Results. Our results show that inverse defect prediction can identify approx.
32-44% of the methods of a project to have a low fault risk; on average, they
are about six times less likely to contain a fault than other methods. In
cross-project predictions with larger, more diversified training sets,
identified methods are even eleven times less likely to contain a fault.
Conclusions. Inverse defect prediction supports the efficient allocation of
test resources by identifying methods that can be treated with less priority in
testing activities and is well applicable in cross-project prediction
scenarios.Comment: Submitted to PeerJ C
Integrate the GM(1,1) and Verhulst models to predict software stage effort
This is the author's accepted manuscript. The final published article is available from the link below. Copyright @ 2009 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other users, including reprinting/ republishing this material for advertising or promotional purposes, creating new collective works for resale or redistribution to servers or lists, or reuse of any copyrighted components of this work in other works.Software effort prediction clearly plays a crucial role in software project management. In keeping with more dynamic approaches to software development, it is not sufficient to only predict the whole-project effort at an early stage. Rather, the project manager must also dynamically predict the effort of different stages or activities during the software development process. This can assist the project manager to reestimate effort and adjust the project plan, thus avoiding effort or schedule overruns. This paper presents a method for software physical time stage-effort prediction based on grey models GM(1,1) and Verhulst. This method establishes models dynamically according to particular types of stage-effort sequences, and can adapt to particular development methodologies automatically by using a novel grey feedback mechanism. We evaluate the proposed method with a large-scale real-world software engineering dataset, and compare it with the linear regression method and the Kalman filter method, revealing that accuracy has been improved by at least 28% and 50%, respectively. The results indicate that the method can be effective and has considerable potential. We believe that stage predictions could be a useful complement to whole-project effort prediction methods.National Natural Science Foundation of
China and the Hi-Tech Research
and Development Program of Chin
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