scholarly journals Modeling Injection Molding of High-Density Polyethylene with Crystallization in Open-Source Software

Polymers ◽  
2020 ◽  
Vol 13 (1) ◽  
pp. 138
Author(s):  
Kristjan Krebelj ◽  
Anton Krebelj ◽  
Miroslav Halilovič ◽  
Nikolaj Mole
Keyword(s):  
Open Source ◽  
Open Source Software ◽  
High Density Polyethylene ◽  
Thermal Contact ◽  
High Density ◽  
Cavity Pressure ◽  
Solution Quality ◽  
The Heat Transfer Coefficient ◽  
Different Levels ◽  
Insight Into

This work investigates crystallization modeling by modifying an open-source computational fluid dynamics code OpenFOAM. The crystallization behavior of high-density polyethylene (HDPE) is implemented according to theoretical and experimental literature. A number of physical interdependencies are included. The cavity is modeled as deformable. The heat transfer coefficient in the thermal contact towards the mold depends on contact pressure. The thermal conductivity is pressure- and crystallinity-dependent. Specific heat depends on temperature and crystallinity. Latent heat is released according to the crystallization progress and temperature. Deviatoric elastic stress is evolved in the solidified material. The prediction of the cavity pressure evolution is used for the assessment of the solution quality because it is experimentally available and governs the residual stress development. Insight into the thermomechanical conditions is provided with through-thickness plots of pressure, temperature and cooling rate at different levels of crystallinity. The code and simulation setup are made openly available to further the research on the topic.

Demography of Open Source Software Prediction Models and Techniques

2021 ◽  
pp. 620-652
Author(s):  
Kaniz Fatema ◽  
M. M. Mahbubul Syeed ◽  
Imed Hammouda
Keyword(s):  
Open Source ◽  
Open Source Software ◽  
Preventive Maintenance ◽  
Prediction Models ◽  
Journal Article ◽  
Literature Survey ◽  
Future Research ◽  
Fundamental Knowledge ◽  
Future Research Directions ◽  
Insight Into

Open source software (OSS) is currently a widely adopted approach to developing and distributing software. Many commercial companies are using OSS components as part of their product development. For instance, more than 58% of web servers are using an OSS web server, Apache. For effective adoption of OSS, fundamental knowledge of project development is needed. This often calls for reliable prediction models to simulate project evolution and to envision project future. These models provide help in supporting preventive maintenance and building quality software. This chapter reports on a systematic literature survey aimed at the identification and structuring of research that offers prediction models and techniques in analysing OSS projects. The study outcome provides insight into what constitutes the main contributions of the field, identifies gaps and opportunities, and distils several important future research directions. This chapter extends the authors' earlier journal article and offers the following improvements: broader study period, enhanced discussion, and synthesis of reported results.

scholarly journals Canadian Public Libraries and their Interest in Open Source Software (OSS)

2018 ◽  
Author(s):  
Dinesh Rathi
Keyword(s):  
Decision Making ◽  
Open Source ◽  
Open Source Software ◽  
Public Libraries ◽  
Evaluation Criteria ◽  
Prise De Décision ◽  
Use Of Resources ◽  
Insight Into

This study presents findings of research conducted in the Open Source Software (OSS) domain in a Canadian public libraries context. The findings from the survey will provide insight into various facets such as use, benefits and challenges of OSS from Canadian libraries’ perspective, OSS evaluation criteria, use of resources to learn about OSS, and decision-making associated with OSS in Canadian libraries context.Cette étude présente les résultats de recherches menées dans le domaine des logiciels libres (Open Source Software - OSS) dans le contexte des bibliothèques publiques canadiennes. Les résultats du sondage fourniront un aperçu de diverses facettes telles que l'utilisation, les avantages et les défis des logiciels libres, du point de vue des bibliothèques canadiennes, des critères d'évaluation des logiciels libres, de l'utilisation des ressources pour en apprendre davantage sur les logiciels libres, et la prise de décision associée aux logiciels libres dans le contexte des bibliothèques canadiennes.

scholarly journals Properties of Raphia Palm Interspersed Fibre Filled High Density Polyethylene

2013 ◽  
Vol 2013 ◽  
pp. 1-5 ◽  
Author(s):  
Henry C. Obasi
Keyword(s):  
Particle Size ◽  
Young’S Modulus ◽  
High Density Polyethylene ◽  
Young's Modulus ◽  
High Density ◽  
Screw Extruder ◽  
Elongation At Break ◽  
Twin Screw ◽  
Partial Degradation ◽  
Different Levels

Blends of nonbiodegradable and biodegradable polymers can promote a reduction in the volume of plastic waste when they undergo partial degradation. In this study, properties of raphia palm interspersed fibre (RPIF) filled high density polyethylene (HDPE) have been investigated at different levels of filler loadings, 0 to 60 wt.%. Maleic anhydride-graft polyethylene was used as a compatibilizer. Raphia palm interspersed fibre was prepared by grinding and sieved to a particle size of 150 µm. HDPE blends were prepared in a corotating twin screw extruder. Results showed that the tensile strength and elongation at break of the blends decreased with increase in RPI loadings and addition of MA-g-PE was found to improve these properties. However, the Young’s modulus increased with increase in the amount of RPI into HDPE and compatibilization further increased the Young’s modulus. The water absorption indices and weight loss for RPI/HDPE composites were found to increase with RPI loadings but were decreased on addition of MA-g-PE.

scholarly journals Roles and Responsibilities for Sustaining Open Source Platforms and Tools

2017 ◽  
Author(s):  
Trevor Owens
Keyword(s):  
Cultural Heritage ◽  
Open Source ◽  
Open Source Software ◽  
Roles And Responsibilities ◽  
The Core ◽  
Project Sustainability ◽  
Building Activities ◽  
Core Part ◽  
Different Levels

Developing, deploying and maintaining open source software is increasingly a core part of the core operations of cultural heritage organizations. From preservation infrastructure, to tools for acquiring digital and digitized content, to platforms that provide access, enhance content, and enable various modes for users to engage with and make use of content, much of the core work of libraries, archives and museums is entangled with software. As a result, cultural heritage organizations of all sizes are increasingly involved in roles as open source software creators, contributors, maintainers, and adopters. Participants in this workshop shared their respective perspectives on institutional roles in this emerging open source ecosystem. Through discussion, participants created drafts of a checklist for establishing FOSS projects, documentation of project sustainability techniques, a model for conceptualizing the role of open source community building activities throughout projects and an initial model for key institutional roles for projects at different levels of maturity.

An Exploratory Study of Conflict over Paying Debian Developers

2016 ◽  
Vol 7 (3) ◽  
pp. 20-38 ◽  
Author(s):  
James H. Gerlach ◽  
Chorng-Guang Wu ◽  
Lawrence F Cunningham ◽  
Clifford E Young
Keyword(s):  
Open Source ◽  
Open Source Software ◽  
Exploratory Study ◽  
Theoretical Framework ◽  
Software Project ◽  
Project Leader ◽  
Citizenship Behaviors ◽  
Speed Up ◽  
Insight Into ◽  
Study Offer

This article reports on an exploratory study of the causes and effects of conflict within the open source software project, Debian. Conflict arose when the project leader decided to introduce payment for select volunteers within an all-volunteer project to speed up the release of Debian. The study utilized the theoretical framework of Boltanski and Thévenot for understanding disputes. The results of the survey of Debian developers show that the conditions for conflict were complex and were driven by perception of misuse of authority, ideology, feeling of inequity, and satisfaction with pay for their regular job. The effects of the conflict were shown to be pervasive as it affected volunteer's citizenship behaviors and withdrawal from the project. Additionally, the conflict led some developers to reaffirm their beliefs about the value of paying volunteers. The conclusions of the study offer insight into the issues of incentivizing volunteer OSS developers.

What Makes Free/Libre Open Source Software (FLOSS) Projects Successful?

2011 ◽  
pp. 87-98 ◽  
Author(s):  
Nicholas P. Radtke ◽  
Marco A. Janssen ◽  
James S. Collofello
Keyword(s):  
Open Source ◽  
Open Source Software ◽  
Scenario Analysis ◽  
Web Server ◽  
Agent Based Model ◽  
Agent Based ◽  
Future Developments ◽  
Insight Into

The last few years have seen a rapid increase in the number of Free/Libre Open Source Software (FLOSS) projects. Some of these projects, such as Linux and the Apache web server, have become phenomenally successful. However, for every successful FLOSS project there are dozens of FLOSS projects which never succeed. These projects fail to attract developers and/or consumers and, as a result, never get off the ground. The aim of this research is to better understand why some FLOSS projects flourish while others wither and die. This article presents a simple agent-based model that is calibrated on key patterns of data from SourceForge, the largest online site hosting open source projects. The calibrated model provides insight into the conditions necessary for FLOSS success and might be used for scenario analysis of future developments of FLOSS.

Demography of Open Source Software Prediction Models and Techniques

2018 ◽  
pp. 24-56
Author(s):  
Kaniz Fatema ◽  
M. M. Mahbubul Syeed ◽  
Imed Hammouda
Keyword(s):  
Open Source ◽  
Open Source Software ◽  
Preventive Maintenance ◽  
Prediction Models ◽  
Journal Article ◽  
Literature Survey ◽  
Future Research ◽  
Fundamental Knowledge ◽  
Future Research Directions ◽  
Insight Into

Open source software (OSS) is currently a widely adopted approach to developing and distributing software. Many commercial companies are using OSS components as part of their product development. For instance, more than 58% of web servers are using an OSS web server, Apache. For effective adoption of OSS, fundamental knowledge of project development is needed. This often calls for reliable prediction models to simulate project evolution and to envision project future. These models provide help in supporting preventive maintenance and building quality software. This chapter reports on a systematic literature survey aimed at the identification and structuring of research that offers prediction models and techniques in analysing OSS projects. The study outcome provides insight into what constitutes the main contributions of the field, identifies gaps and opportunities, and distils several important future research directions. This chapter extends the authors' earlier journal article and offers the following improvements: broader study period, enhanced discussion, and synthesis of reported results.

Open Source Software Evaluation

2009 ◽  
pp. 52-65
Author(s):  
Karin van den Berg
Keyword(s):  
Open Source ◽  
Open Source Software ◽  
Software Package ◽  
Evaluation Criteria ◽  
Software Evaluation ◽  
Intended Purpose ◽  
The Future ◽  
The Right ◽  
Insight Into

If a person or corporation decides to use open source software for a certain purpose, nowadays the choice in software is large and still growing. In order to choose the right software package for the intended purpose, one will need to have insight and evaluate the software package choices. This chapter provides an insight into open source software and its development to those who wish to evaluate it. Using existing literature on open source software evaluation, a list of nine evaluation criteria is derived including community, security, license, and documentation. In the second section, these criteria and their relevance for open source software evaluation are explained. Finally, the future of open source software evaluation is discussed.

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