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Forecasting the Number of Changes in Eclipse Using Time Series Analysis

Israel Herraiz, Jesus M. Gonzalez-Barahona, Gregorio Robles
2007 Fourth International Workshop on Mining Software Repositories (MSR'07:ICSE Workshops 2007)  
In order to predict the number of changes in the following months for the project Eclipse, we have applied a statistical (non-explanatory) model based on time series analysis.  ...  We have obtained the monthly number of changes in the CVS repository of Eclipse, using the CVSAnalY tool.  ...  The idea of using time series analysis to predict software is not new.  ... 
doi:10.1109/msr.2007.10 dblp:conf/msr/HerraizGR07a fatcat:fd7otfnr7fboreifo3sprhw7gi

Software Evolution Prediction Using Seasonal Time Analysis: A Comparative Study

Miguel Goulão, Nelson Fonte, Michel Wermelinger, Fernando Brito e Abreu
2012 2012 16th European Conference on Software Maintenance and Reengineering  
In this paper we use a time series forecasting model to predict software maintenance and evolution requests in an open source software project (Eclipse), as an example of projects with seasonal release  ...  Prediction models of software change requests are useful for supporting rational and timely resource allocation to the evolution process.  ...  , and the anonymous reviewers for their valuable feedback.  ... 
doi:10.1109/csmr.2012.30 dblp:conf/csmr/GoulaoFWA12 fatcat:ttdeilck5vfdro4fawiaha3mse

Trend Analysis and Issue Prediction in Large-Scale Open Source Systems

Benedicte Kenmei, Giuliano Antoniol, Massimiliano di Penta
2008 Software Maintenance and Reengineering (CSMR), Proceedings of the European Conference on  
In particular, this paper focuses on the number of new change requests per KLOC and per unit of time.  ...  The case studies show the capability of time series to model change request density and provide empirical evidence of an increasing trend in newly opened change requests in the JBoss application framework  ...  Acknowledgment This research was partially supported by the Natural Sciences and Engineering Research Council (NSERC) of Canada (Research Chair in Software Change and Evolution #950-202658) and by G.  ... 
doi:10.1109/csmr.2008.4493302 dblp:conf/csmr/KenmeiAP08 fatcat:m5pbdr7kdngulatoffghc3ud3e

Eclipse-induced wind changes over the British Isles on the 20 March 2015

S. L. Gray, R. G. Harrison
2016 Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences  
The near-surface effects of the solar eclipse of 20 March 2015 are derived through comparison of output from the Met Office's operational weather forecast model (which is ignorant of the eclipse) with  ...  Wind direction changes have previously been attributed to a large-scale 'eclipse-induced coldcored cyclone', mountain slope flows, and changes in the strength of sea breezes.  ...  RGH and SLG both designed the study. RGH provided some analysis code, performed the analysis of the nocturnal jet, assisted in the interpretation of the analysis and edited the manuscript.  ... 
doi:10.1098/rsta.2015.0224 pmid:27550759 pmcid:PMC5004054 fatcat:557utfuewzfhlherba7belv4hq

Different methods of traffic forecast based on real data

R. Chrobok, O. Kaumann, J. Wahle, M. Schreckenberg
2004 European Journal of Operational Research  
Different methods to forecast traffic are analysed and discussed. An elementary approach is to develop heuristics based on the statistical analysis of historical data.  ...  The results show that the constant model provides a good prediction for short horizons whereas the heuristics is better for longer times.  ...  Acknowledgements The authors are grateful to Straßen NRW and the Municipal Authority of Duisburg for data support and to the Ministry of Transport, Energy and Spatial Planning of North Rhine-Westphalia  ... 
doi:10.1016/j.ejor.2003.08.005 fatcat:orq4afyfwne5jkl74j2ziwwoqa

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

Cesar Couto, Marco Valente, Pedro Pires, Andre Hora, Nicolas Anquetil, Roberto S Bigonha
2014 Journal of Software Engineering Research and Development  
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.  ...  Despite 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  ...  This test evaluates whether past changes to a given time series of source code metrics can be used to forecast changes in a time series of defects.  ... 
doi:10.1186/2195-1721-2-1 fatcat:3hlazyditndjdd6jpdh3in5lai

Numerical simulations of the impact of the 20 March 2015 eclipse on UK weather

P. A. Clark
2016 Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences  
Anglia, deeper to the NW and changes very little with the eclipse. These behaviours are also illustrated in the time series in Fig. 11.  ...  Fig. 1(a), while the time series of the factor at Reading is plotted (at 5-minute intervals) in Fig. 1(b).  ... 
doi:10.1098/rsta.2015.0218 pmid:27550770 fatcat:ykn3gfjmevc5zftenshu4j2iey

ECLIPSE : Envisioning Cloud Induced Perturbations in Solar Energy [article]

Quentin Paletta, Anthony Hu, Guillaume Arbod, Joan Lasenby
2021 arXiv   pre-print
A promising approach to forecast the temporal variability of solar irradiance resulting from the cloud cover dynamics is based on the analysis of sequences of ground-taken sky images or satellite images  ...  Despite encouraging results, a recurrent limitation of existing deep learning approaches lies in the ubiquitous tendency of reacting to past observations rather than actively anticipating future events  ...  Acknowledgements The authors acknowledge SIRTA for providing the data used in this study.  ... 
arXiv:2104.12419v2 fatcat:sc7k2v5phbhqdm5ob4pjir2dbe

CV2 USING AN INTERRUPTED TIME SERIES ANALYSIS TO ASSESS THE IMPACT OF VALSARTAN INITIATION ON MEDICAL COSTS FOR PATIENTS WITH HYPERTENSION

P Sun, JR Chang, J Zhang, KH Kahler
2010 Value in Health  
in a state Medicaid program, and who had an index prescription claim for ACEI/ARB in the first six months of 2002 were included in the study.  ...  Adherence with ACEI/ARB therapy was measured using the proportion of days covered (PDC) during the 12-month post-index period. Nonadherence was defined as PDC < 0.8.  ...  CV2 USING AN INTERRUPTED TIME SERIES ANALYSIS TO ASSESS THE IMPACT OF VALSARTAN INITIATION ON MEDICAL COSTS FOR PATIENTS WITH HYPERTENSION Sun P 1 , Chang JR 2 , Zhang J 2 , Kahler KH 2 1 Kailo Research  ... 
doi:10.1016/s1098-3015(10)72033-7 fatcat:rw625gxjtnes5aj6c6jauabmgi

A Case Study on the Effects of Partial Solar Eclipse on Distributed Photovoltaic Systems and Management Areas

Aditya Sundararajan, Temitayo Olowu, Longfei Wei, Shahinur Rahman, Arif Sarwat
2019 IET Smart Grid  
devices on the feeders during eclipse peak using an IEEE 8500 test case distribution feeder; and reliability study involving a multilayer perceptron framework for forecasting system reliability of the  ...  A solar eclipse causes significant changes in these parameters, thereby impacting PV generation profile, performance, and power quality of larger grid, where they connect to.  ...  Taking the derived regression models as inputs, we proposed an MLP to forecast the daily reliability indices using time series of common weather data.  ... 
doi:10.1049/iet-stg.2019.0002 fatcat:lnq33w5rlbh2pe7xppa42exufi

Understanding Open Source Software Evolution Using Fuzzy Data Mining Algorithm for Time Series Data

Munish Saini, Sandeep Mehmi, Kuljit Kaur Chahal
2016 Advances in Fuzzy Systems  
This study explores a fuzzy data mining algorithm for time series data to generate the association rules for evaluating the existing trend and regularity in the evolution of open source software project  ...  The idea to choose fuzzy data mining algorithm for time series data is due to the stochastic nature of the open source software development process.  ...  [8] applied a stationery model based on time series analysis to the monthly number of changes in the CVS repository of Eclipse.  ... 
doi:10.1155/2016/1479692 fatcat:fraifvcoj5fn3k2yq2vtu52jeq

Modern warming, medieval and ancient optimums as the result of orbital changes in the Earth-Moon-Sun system

Larisa Litvinenko, Victoria Litvinenko, D. Rudoy, A. Olshevskaya, V. Kankhva
2020 E3S Web of Conferences  
The annual changes in the position of the total vector of gravitational forces in space visually reflects the movement of the shadow cone of solar eclipses around the globe.  ...  The aim and novelty of the study is to identify the relationship between the number of years with four to five polar eclipses (in periods of pessimums, their number reaches 15-17 years, and in periods  ...  of the 19-20 centuries, made with due respect to their authors, contributed to the successful solution of the problems in determining the time limits of little glaciation (1590-1850) in Europe and the  ... 
doi:10.1051/e3sconf/202021002008 fatcat:w2zjdbgqdzevtcnhmchych6uwq

Using Time Series Models for Defect Prediction in Software Release Planning

James Tunnell, John Anvik
2015 Proceedings of the 27th International Conference on Software Engineering and Knowledge Engineering  
A time series model is presented that uses historical project information to predict the number of future defects, given the number of proposed features and improvements to be completed.  ...  This allows for hypothetical release plans to be compared by assessing their predicted impact on testing and defect-fixing time. We selected the VARX time series model as a reasonable approach.  ...  Forecasting Selected models were used to forecast the number of defects in the next sample after the end of the window.  ... 
doi:10.18293/seke2015-174 dblp:conf/seke/TunnellA15 fatcat:qkigbupn6bdhdfstwbg3axhc4a

CM4 IMPACT OF MULTIPLE MEDICATION COMPLIANCE ON HEALTH CARE UTILIZATION IN PATIENTS WITH COMORBID TYPE II DIABETES AND CARDIOVASCULAR DISEASE

MB Nichol, JJ An, J Wu, J Priest, TK Knight, C Cantrell
2010 Value in Health  
in a state Medicaid program, and who had an index prescription claim for ACEI/ARB in the first six months of 2002 were included in the study.  ...  Adherence with ACEI/ARB therapy was measured using the proportion of days covered (PDC) during the 12-month post-index period. Nonadherence was defined as PDC < 0.8.  ...  CV2 USING AN INTERRUPTED TIME SERIES ANALYSIS TO ASSESS THE IMPACT OF VALSARTAN INITIATION ON MEDICAL COSTS FOR PATIENTS WITH HYPERTENSION Sun P 1 , Chang JR 2 , Zhang J 2 , Kahler KH 2 1 Kailo Research  ... 
doi:10.1016/s1098-3015(10)72031-3 fatcat:vmfdvyy3evbkrl26efndqjazem

CV3 EFFECT OF BIVALIRUDIN ON ECONOMIC OUTCOMES OF STEMI PATIENTS IN AN OBSERVATIONAL DATASET

DP Kessler
2010 Value in Health  
in a state Medicaid program, and who had an index prescription claim for ACEI/ARB in the first six months of 2002 were included in the study.  ...  Adherence with ACEI/ARB therapy was measured using the proportion of days covered (PDC) during the 12-month post-index period. Nonadherence was defined as PDC < 0.8.  ...  CV2 USING AN INTERRUPTED TIME SERIES ANALYSIS TO ASSESS THE IMPACT OF VALSARTAN INITIATION ON MEDICAL COSTS FOR PATIENTS WITH HYPERTENSION Sun P 1 , Chang JR 2 , Zhang J 2 , Kahler KH 2 1 Kailo Research  ... 
doi:10.1016/s1098-3015(10)72034-9 fatcat:qcnfzzilejh4bjn6mue5emycbe
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