Rozprawy doktorskie: „Evaluation and open source”

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Othman, Bassam. "Open source : evaluation of database modeling CASE." Thesis, University of Skövde, Department of Computer Science, 2003. http://urn.kb.se/resolve?urn=urn:nbn:se:his:diva-767.

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Open source software is becoming increasingly popular and many organizations are using them, such as apache (used by over 50% of the world’s web servers) and Linux (a popular operating system). There exist mixed opinions about the quality of this type of software.The purpose of this study is to evaluate quality of open source CASE-tools and compare it with quality of proprietary CASE-tools. The evaluation concerns tools used for database modeling, where the DDL-generation capabilities of these tools are studied. The study is performed as a case study where one open source (two, after experiencing some difficulties with the first tool) and one proprietary tool are studied.The results of this study indicate that open source database modeling CASE-tools are not ready to challenge proprietary tools. However software developed as open source usually evolve rapidly (compared to proprietary software) and a more mature open source tool could emerge in the near future.

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Tekir, Selma Koltuksuz Ahmet. "An Implementation Model For Open Sources Evaluation/." [s.l.] : [s.n.], 2004. http://library.iyte.edu.tr/tezler/master/bilgisayaryazilimi/T000419.pdf.

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Ali, Murad. "Performance Evaluation of an Open-source Multicast Router." Thesis, KTH, School of Information and Communication Technology (ICT), 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-24268.

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Open-source routing has gained momentum in the last few years due to expensive proprietary network hardware and software. People and organizations want more control on routing hardware and software. Inspired by the success of open-source software, and contributions by researchers and many volunteer developers across the globe, there are two open-source routing stacks in the market which are quite promising in terms of performance and features, namely Quagga and XORP. These routing daemons can run on many different hardware and operating systems, and are free to download and customize according to personal preference. Today, assembling a router from off-the-shelf hardware and open-source software is a matter of a few minute efforts. Nowadays, open-source software has become an integral part of many commercial network products.This thesis presents a performance evaluation study of an open-source multicast router. Open-source routing software is used to build a fully functional, high-performing open-source multicast router. The multicast router is running the XORP (pronounced as Zorp) routing software installed on the Debian Linux operating system. A testbed which consisted of three open-source routers was created, where different performance and operational tests were conducted. The tests mainly concerned the evaluation of the multicast routing functionality of an open-source router in a production-like environment where triple-play services were provided to the customers. Linux Differentiated Services were used to provide quality of service to three different traffic classes. Besides these tests, reliability, router management and interoperability with proprietary routers were also evaluated.

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Nilsson, Mikael. "Open-source Workflow Evaluation : An evaluation of the Activiti BPM Platform." Thesis, Mittuniversitetet, Institutionen för informationsteknologi och medier, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:miun:diva-17033.

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Jagannathan, Srivatsan. "Comparison and Evaluation of Open-source Cloud Management Software." Thesis, KTH, Kommunikationsnät, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-99004.

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The number of cloud management software related to a private infrastructure-as-a-service cloud is increasing day-by-day. The features of the cloud management software vary significantly and this creates a difficulty for the cloud consumers to choose the software based on their business requirements. An example of the problem is choosing software with a power management feature. The power management feature is used to increase the efficiency of energy consumption by consolidating virtual machines together and turning off unused physical servers, which is not provided by many cloud management software. OpenNebula is one of the most widely used open-source cloud management software among research institutions and enterprises. However, the performance characteristic of OpenNebula is not well studied in the existing literature. An example of the problem is choosing a hardware configuration to run OpenNebula for the research institutions and enterprises. The first objective of this thesis is to develop a framework for comparing features of various cloud management software. For developing this framework, existing works are reviewed. The cloud management software is installed on the KTH LCN testbed for hands-on experience. Both the open-source and the commercial software are analyzed for developing the framework. The major contribution related to the framework is identifying features provided for the commercial software that are not available for the open-source software. The features are: (1) co-location of VMs is running a group of VMs on the same physical machine (for example, if the web server VM has to access the application server VM for getting the web pages, they can be placed on the same physical machine); (2) anti-co-location of VMs is not allowing a pair of VMs to run on a single physical machine (for example, the primary and back-up web server VMs should always run on the different physical machines); (3) the resources of the physical machines can be combined (e.g., number of CPU cores, physical memory) as a resource pool and compartmentalized into an organizational structure (e.g., HR, development, testing, etc). The second objective of this thesis is to evaluate the performance of the OpenNebula cloud management software. For the performance evaluation, existing works are reviewed to identify the metrics, and the OpenNebula cloud management software is installed on the KTH LCN testbed. The performance of the OpenNebula software was evaluated for different virtual machine operations, virtual machine types, number of virtual machines and change in load of the system. The major lessons learned related to the performance evaluation are: (1) the duration for the live migration does not change with the load; (2) the duration for the live migration increases linearly as the memory assigned to the VM increases; (3) the duration of the add and delete operations increases linearly as the number of VMs increases.

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Barkmann, Henrike. "Quantitative Evaluation of Software Quality Metrics in Open-Source Projects." Thesis, Växjö University, School of Mathematics and Systems Engineering, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:vxu:diva-2562.

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The validation of software quality metrics lacks statisticalsignificance. One reason for this is that the data collectionrequires quite some effort. To help solve this problem,we develop tools for metrics analysis of a large number ofsoftware projects (146 projects with ca. 70.000 classes andinterfaces and over 11 million lines of code). Moreover, validationof software quality metrics should focus on relevantmetrics, i.e., correlated metrics need not to be validated independently.Based on our statistical basis, we identify correlationbetween several metrics from well-known objectorientedmetrics suites. Besides, we present early results oftypical metrics values and possible thresholds.

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Wang, Jiayi. "Evaluation of open source IP based embedded system with Linux." Thesis, Mittuniversitetet, Avdelningen för elektronikkonstruktion, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:miun:diva-19850.

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Embedded system plays an important role in various industry applications. An embedded system is consisting of software and hardware. The hardware platform of conventional embedded system is typically based on IC chips that have fixed resources. Besides, with the development of FPGA, an emerging approach for designing embedded system is implementing soft IP cores on FPGAs. Soft IP cores are synthesizable hardware blocks described in HDL language. Their source code can be either open or close to public. For example, OpenRISC 1200, is an open source 32-bit RISC microprocessor. In addition, the increasing complexity of embedded system forces software developers to consider operating system support to reduce their workload. Thus, in this thesis, a prototype of open source IP based embedded system with Linux is implemented on Atlys (Xilinx Spartan-6) FPGA board and the goal is to evaluate if the system is appropriate for industrial applications. The hardware platform is ORPSOC, which is a reference SoC design based on OpenRISC 1200 processor. For software, Linux operating system is installed. Furthermore, an application executes on Linux is developed that reads the output of an I2C compass sensor-LSM303DLM. With the success of the application and the investigation of license issues, the conclusion is drawn that open source IP based embedded system with Linux is usable for industry. Although comparing to conventional embedded system, the open source IP based embedded system with Linux has following cons, such as high product cost, basic-supported development environment and more difficult software development if Linux driver doesn’t support the hardware. However, its pros are high flexibility and scalability, high software portability, low software development difficulty and high reusability that make it more suitable for industry usage.

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Nallapati, Shiva Chaitanya, and Viswa VardhanReddy Karna. "Performance Evaluation of Various Open Source Projects Providing SIP Functionality." Thesis, Blekinge Tekniska Högskola, Sektionen för datavetenskap och kommunikation, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:bth-4061.

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In recent times, the usage of Voice and Video over Internet Protocol (VoIP) services has increased tremendously. There are many signaling protocols such as Bearer Independent Call Control (BICC), H.323, Media Gateway Control Protocol (MGCP), Session Initiation protocol (SIP) etc., that are used for establishment of sessions and to carry out voice and video data services. SIP has become popular because of its easy implementation, flexibility and good scalability. Choice of Open Source SIP server software (OS-SIP Server Software) is important when deploying in a VoIP based network. So we need to evaluate the performance of OS-SIP Server Softwares in an ideal condition before it is deployed to real environment. This document evaluates and compares the performance of three OS-SIP Server Softwares which are quite popular. A SIPp traffic generator tool is used to generate scenarios namely Registration with authentication, Registration without authentication, Session establishment, and Session establishment with response delay at User Agent Server (UAS) side. Using these scenarios, the performance of OS-SIP Server Softwares is evaluated with respect to parameters such as Registrations per second, Calls per second, Response delay, and Percentage of successful calls and registrations. From the experimental results, we observed that there is a significant performance difference among the SIP server softwares. OpenSIPS is the best OS-SIP Server Software for the scenarios Registration with authentication, Registration without authentication and Session establishment with response delay. Asterisk server is the best OS-SIP Server Software when compared with the other two (OpenIMSCore and OpenSIPS) servers for the scenario Session establishment.

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Yelleswarapu, Mahesh Chandra. "An Assessment of the Usability Quality Attribute in Open Source Software." Thesis, Blekinge Tekniska Högskola, Sektionen för datavetenskap och kommunikation, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:bth-2193.

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Usability is one of the important quality attributes. Open source software products are well known for their efficiency and effectiveness. Lack of usability in OSS (Open Source Software) products will result in poor usage of the product. In OSS development there is no usability team, and one could therefore expect that the usability would be low for these products. In order to find out if this was really the case we made a usability evaluation using a questionnaire for four OSS products. The questionnaire was based on a review of existing literature. This questionnaire was presented to 17 people who are working with open source products. This evaluation showed that the overall usability was above average for all the four products. It seems, however, that the lack of a usability team has made the OSS products less easy to use for inexperienced users. Based on the responses to questionnaire and a literature review, a set of guidelines and hints for increasing the usability of OSS products was defined.

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Ballester, Lafuente Carlos. "Evaluating Security in Open Source Consumer Applications." Thesis, Norwegian University of Science and Technology, Department of Computer and Information Science, 2007. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-9523.

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Introduction The aim of this Master Thesis is to develop a software security guideline that will be used for evaluating methods and measuring security in open source projects with a high security implication such as healthcare applications for example, where the privacy and security is a crucial factor. Background Theory First section of thesis is focused on presenting the appropriate background theory that will be needed for a good understanding of the rest of the thesis, like vulnerabilities, common security attacks, definition of the client-server technology, risk analysis and specific theory about Indivo and the healthcare field. Methods The method chosen to develop the guideline was the waterfall model as time was quite limited and only one iteration could be done. Thats why no other methods like the spiral model were used, as they require several iterations until achieving functionality. Results After applying the guideline, several vulnerabilities were found, like session hijacking or capturing login information on real time. The guideline proved to be useful in revealing serious security issues that should be fixed, and into describing the purpose and the logic of decisions made in early stages like organizational or design stage. Conclusion Both the development of the Security Guideline and the posterior testing of the guideline were considered successful, as a working methodology was established and several security issues were revealed in Indivo.

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Tigulla, Anil Reddy, and Satya Srinivas Kalidasu. "Evaluating Efficiency Quality Attribute in Open Source Web browsers." Thesis, Blekinge Tekniska Högskola, Institutionen för programvaruteknik, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:bth-2584.

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Context: Now a day’s end users are using different types of computer applications like web browsers, data processing tools like MS office, notepad etc., to do their day-to-day works. In the real world scenario, the usage of Open Source Software (OSS) products by both industrial people and end users are gradually increasing. The success of any OSS products depends on its quality standards. ‘Efficiency’ is one of the key quality factor, which portray the standards of product and it is observed that this factor is given little importance during its development. Therefore our research context lies within evaluating the efficiency quality attribute in OSS web browsers. Objectives: As discussed earlier the context of this research lies in evaluating the efficiency of OSS web browsers, the initial objective was to identify the available efficiency measures from the current literature and observe which type of measures are suitable for web browsers. Then our next objective is to compute values for the identified efficiency measures by considering a set of predefined web browsers from all the categories. Later we proposed Efficiency Baseline Criteria (EBC) and based on this criterion and experiment results obtained, the efficiency of OSS web browsers had been evaluated. Therefore the main objective of conducting this research is to formulate EBC guidelines, which can be later used by OSS developers to test their web browsers and ensure that all the quality standards are strictly adhered during the development of OSS products. Methods: Initially Literature Review (LR) was conducted in order to identify all the related efficiency quality attributes and also observe the sub-attribute functionalities, that are useful while measuring efficiency values of web browsers. Methods and procedures which are discussed in this LR are used as input for identifying efficiency measures that are related to web browsers. Later an experiment was performed in order to calculate efficiency values for CSS & proprietary set of web browsers (i.e. Case A) and OSS web browsers (i.e. Case B) by using different tools and procedures. Authors themselves had calculated efficiency values for both Case A and Case B web browsers. Based on the results of Case A web browsers, EBC was proposed and finally an statistical analysis (i.e. Mann Whitney U-test) is performed in order to evaluate the hypothesis which was formulated in experiment section. Results: From the LR study, it is observed that efficiency quality attribute is classified into two main categories (i.e. Time Behavior and Resource Utilization). Further under the category of Time behavior a total of 3 attributes were identified (i.e. Response time, Throughput and Turnaround time). From the results of LR, we had also observed the measuring process of each attribute for different web browsers. Later an experiment was performed on two different sets of web browsers (i.e. Case A and Case B web browsers). Based on the LR results, only 3 efficiency attributes (i.e. response time, memory utilization and throughput) were identified which are more suitable to the case of web browsers. These 3 efficiency attributes are further classified into 10 sub-categories. Efficiency values are calculated to both Case A and B for these 10 identified scenarios. Later from Case A results EBC values are generated. Finally hypothesis testing was done by initially performing K-S test and results suggest choosing non-parametric test (i.e. Mann Whitney U-test). Later Mann Whitney U-test was performed for all the scenarios and the normalized Z scores are more than 1.96, further suggested rejecting null hypothesis for all the 10 scenarios. Also EBC values are compared with Case B results and these also suggest us that efficiency standard of OSS web browsers are not equivalent to Case A web browsers. Conclusions: Based on quantitative results, we conclude that efficiency standards of OSS web browsers are not equivalent, when compared to Case A web browsers and the efficiency standards are not adhered during development process. Hence OSS developers should focus on implementing efficiency standards during the development stages itself in order to increase the quality of the end products. The major contribution from the two researchers to this area of research is “Efficiency Baseline Criteria”. The proposed EBC values are useful for OSS developers to test the efficiency standards of their web browser and also help them to analyze their shortcomings. As a result appropriate preventive measures can be planned in advance. +91 - 9491754620

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Massoud, Mostafa. "Evaluation of an Adaptive AUTOSAR System in Context of Functional Safety Environments." Master's thesis, Universitätsbibliothek Chemnitz, 2017. http://nbn-resolving.de/urn:nbn:de:bsz:ch1-qucosa-230004.

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The rapidly evolving technologies in the automotive industry have been defining new challenges, setting new goals and consenting to more complex systems. This steered the AUTOSAR community toward the independent development of the AUTOSAR Adaptive Platform with the intention of addressing and serving the demands defined by the new technology drivers. The use of an already existing software based on an open-source development - specifically GNU/Linux - was recognized as a matching candidate fulfilling the requirements defined by AUTOSAR Adaptive Platform as its operating system. However, this raises new challenges in addressing the safety aspect and the suitability of its implementation in safety-critical environments. As safety standards do not explicitly handle the use of open-source software development, this thesis proposes a tailoring procedure that aims to match the requirements defined by ISO 26262 for a possible qualification of GNU/Linux. And while very little is known about the behavior specification of GNU/Linux to appropriate its use in safety-critical environments, the outlined methodology seeks to verify the specification requirements of GNU/Linux leveraging its claimed compliance to the POSIX standard. In order to further use GNU/Linux with high pedigree of certainty in safety-critical applications, a software partitioning mechanism is implemented to provide control over the resource consumption of the operating system –specifically computation time and memory usage- between different criticality applications in order to achieve Freedom from Interference. The implementation demonstrates the ability to avoid interference concerning required resources of safety-critical applications.

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Sanga, Camilius. "A technique for the evaluation of free and open source e-learning systems." Thesis, University of the Western Cape, 2010. http://etd.uwc.ac.za/index.php?module=etd&action=viewtitle&id=gen8Srv25Nme4_6242_1306494254.

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Evaluating software is a universal and complex problem. The question is: how should software be selected and adopted, or rather, which of the software packages is the most suitable for a specific environment? Extensive research on the evaluation of software has been done, but only a few researchers have considered evaluation of e-learning systems based on three software quality characteristics (i.e. usability, maintainability and deployability) for implementation in third world countries. In this thesis, it will be considered how to use a mixed research methods for the evaluation of free and open source e-learning systems in a developing country. The scope of this investigation is the evaluation of two free and open source e-learning systems at the Open University of Tanzania using 33 stakeholders (some with more and others with less computer expertise).

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Königsson, Niklas. "Limitations of static analysis tools : An evaluation of open source tools for C." Thesis, Umeå universitet, Institutionen för datavetenskap, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-155299.

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This paper contains an evaluation of common open source static analysistools available for C. The tools algorithms are examined and measured in a test environment designed for such benchmarks to present their strengths and weaknesses. The examined tools represent different approaches to static analysis to get a good coverage of the algorithms that are commonly used. The test environment shows how many bugs that are correctly reportedby the tools, and also how many falsely reported bug they produce. The revealed strengths and weaknesses are discussed in relation to the tools algorithms to gain a deeper understanding of their limitations.

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Mijinyawa, Kabiru. "An evaluation of open source software adoption by UK SMEs in the IT industry." Thesis, Brunel University, 2008. http://bura.brunel.ac.uk/handle/2438/4509.

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This study evaluates the adoption of Open Source Software (OSS) by IT Small to Medium-sized Enterprises (SMEs) in the UK. The growing popularity and acceptance of OSS continues to draw much attention in research and practice. However, researchers and IT practitioners within the UK SME sector still face challenges in understanding the issues that influence the acceptance, adoption, and diffusion of OSS. While previous research studies have focused mainly on the software development model and the unique characteristics of OSS, the area of OSS adoption by UK SMEs has largely been ignored. Furthermore, there is a lack of widely-acceptable theories that explain the adoption of OSS, implying that there is limited understanding of OSS adoption by UK SMEs. This gap in research has led this thesis to evaluate existing adoption theories and then apply the 'Decomposed Theory of Planned Behaviour' to model the adoption of OSS by SMEs. Based on the emerged conceptual model, an innovative and structured qualitative research design that uses a case study strategy was developed to evaluate the adoption of OSS across 10 UK SMEs in the IT industry. The analysis of the standardised data from the case study interviews led to the definition of the 16 factors of an emergent theory of OSS adoption by IT SMEs. The analysis of that empirical model has led to important conclusions including the following five issues, summarily. (1) The participant IT SMEs were drawn to different benefits, and experienced different challenges, in using OSS, suggesting that there is subjectivity and complexity in the factors influencing OSS adoption. (2) As in most Information and Communication Technology (ICT) adoption, ITcapability was identified to be essential for successful adoption of OSS, and therefore, it presents potential for important cooperative and collaborative support with OSS communities. (3) The emergent theory from this research study provide researchers and practitioners with variables for surveying critical-success-factors and a reference model for understanding the adoption of OSS. (4) The emergent theory and other general findings from this study are likely to have relevance in other areas of Information Systems research and practice, owing to the factors and theoretical framework that are common to OSS and general ICT acceptance, adoption, and diffusion. (5) This study appears to be the first that has focused on developing a widely-acceptable theory of OSS adoption by IT SMEs in the UK, suggesting that this innovative research study is a novel contribution that has important implications for theory and practice in OSS and general ICT acceptance, adoption, and diffusion.

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Cummings, David J. "Survivability as a tool for evaluating open source software." Thesis, Monterey, California: Naval Postgraduate School, 2015. http://hdl.handle.net/10945/45833.

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Approved for public release; distribution is unlimited This thesis explores the application of traditional survivability analysis to the open source software (OSS) development process. It postulates that combat systems face potential threats from cyber warfare professionals aiming to manipulate software embedded in the systems. The research highlights current Department of Defense (DOD) interest in OSS, and explains a method for evaluating the capability of OSS programs to withstand cyber warfare attacks. Survivability concepts are demonstrated in a scenario involving an adversary inserting malicious code into the source repository of FlightGear, an open source flight simulator. Analysis is conducted on five open source programs to illustrate commonality in the evaluation process. It is determined that survivability analysis is a feasible method for OSS software evaluation, and could be used as a tool to compare OSS alternatives.

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Ross, Timothy A. "Searching without SQL: Re-engineering a database-centric web application with open-source information retrieval software." Thesis, School of Information and Library Science, 2008. http://hdl.handle.net/1901/579.

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This paper seeks to describe the process by which a database-centric web application was redesigned and rewritten to take advantage of Apache’s Lucene - an open-source information retrieval software library written in the Java programming language. After the implementation of a Lucene-based text index of “semi-structured data”, a college radio station's card catalog application was able to deliver higher-quality search results in significantly less time than it was able to do using just a relational database alone. Additionally, the dramatic improvements in speed and performance even allowed the search results interface to be redesigned and enhanced with an improved pagination system and new features such as faceted search/filtering.

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Eduardo, Feliciana. "The development and evaluation of an online master's module using an open-source software package." Diss., Pretoria :[s.n.], 2007. http://upetd.up.ac.za/thesis/available/etd-04182008-100020.

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Yuan, Dongqing. "Developing and Evaluating an Open Source Network Laboratory and Curriculum." NSUWorks, 2011. http://nsuworks.nova.edu/gscis_etd/345.

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This study focused on developing and evaluating an open source software (OSS) network laboratory and curriculum for information technology (IT) program students. A review of literature revealed that to date there have been very few published studies on the development of the labs with clear and specific learning outcomes mapping the Institute for Electrical and Electronic Engineers (IEEE) and Association of Computing Machinery (ACM) IT computing curriculum recommendations. In addition, very few efforts have been taken to develop the lab and curriculum by using instructional design and learning theory from a pedagogical perspective. The goals of the research were to (a) analyze current computer networking education in the higher education system and the IEEE/ACM IT computing curriculum recommendation, (b) map the labs to the learning outcomes recommended by IEEE/ACM IT computing curriculum, (c) create and implement the OSS-based network laboratory and curriculum, and (d) evaluate the effectiveness of the laboratory and curriculum. The dissertation followed a developmental research model for the development of the lab and curriculum. The needs of the new curriculum were identified and the instructional goal was established. The 2008 ACM/IEEE computing curriculum recommendations were analyzed and translated into the lab objectives. Then five OSS labs were designed and implemented to cover the recommended learning outcomes. The curriculum was delivered to the students for two semester offerings at University of Wisconsin-Stout. An evaluation strategy which included a pretest, a posttest, and survey instrument was developed to measure students' performance and attitudes about the labs. The test questions were mapped to the learning objectives of the labs. The performances of the students from the intervention and control group were compared with paired t tests. Statistical analysis indicated that the labs were effective in introducing students to the concepts of computer networking. Students' comments also indicated that they preferred hands-on labs coupled with the classroom lectures. These results confirmed findings reported from previous studies. Additionally, based on some students' recommendation, the OSS network labs for distance online students could be a future direction to pursue.

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Esbjörnsson, Linus. "Android GUI Testing : A comparative study of open source Android GUI testing frameworks." Thesis, Högskolan i Skövde, Institutionen för informationsteknologi, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:his:diva-11107.

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Android is one of the most popular mobile operating systems on the market today with a vast majority of the market share when it comes to mobile devices. Graphical user interfaces (GUI) are often seen on the applications on these devices. Testing of these GUIs is important since they often make up for half of the source code of the application, and they are used to interact with the application. Automating these tests is very useful since it saves a lot of time, but can be difficult. The tools that are available for automating the tests are often not suitable for the developers’ needs, because of the lack of functionality. Therefore, the need for a characterization of the frameworks is needed, so that developers more easily can fit a framework for their needs. In this study, four open source frameworks for Android GUI testing have been selected for evaluation: Robotium, Selendroid, UI Automator and Espresso. Criteria used in the evaluation have been identified with the help of a literature analysis.The results show that two of the frameworks, Robotium and Espresso, lack the ability to fully test activities, which is the main component of Android application GUIs. Furthermore, the study resulted in characterizations of the frameworks.

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Márki, András. "Evaluation on how suitable open source tools are for model to model transformation : An industrial point of view." Thesis, Högskolan i Skövde, Institutionen för kommunikation och information, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:his:diva-8265.

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Model-Driven Development can improve the development process, but it needs tools for model transformation. For industrial companies, the most important aspect is that the transformation tools should scale well, so that they can be used with huge models. There are some open-source model transformation tools on the market, and this report aims to investigate the scalability of open source tools for model transformation. For the investigation, Eclipse Modeling Framework is used. This report identifies four open-source model transformation tools (ATL, QVT Operational, QVT Declarative, SmartQVT) and identifies the variables needed for a tool to be evaluated within the bounds of an experiment. The only tool which could be benchmarked was ATL, which scaled linearly in both terms of transformation time and memory consumption.

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Jahn, Sascha. "Analyse von Open-Source-Software zur Unterstützung operativer Virtueller Unternehmen – eine Bewertungsmethode am Beispiel der Biotechnologie-Branche." Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2016. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-204285.

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Aus der Einleitung: "Virtuelle Organisationen sind zu einem festen Bestandteil des wirtschaftlichen und gesellschaftlichen Gesamtgefüges geworden. Ihre Mitglieder verfolgen mit ihnen ein gemeinsames Ziel, arbeiten dabei zeitlich und räumlich verteilt und überwinden sowohl Unternehmensgrenzen als auch kulturelle Barrieren. Als Enabler ihrer zielgerichteten, arbeitsteiligen Prozesse dient hierbei die Informations- und Kommunikationstechnologie (IuK). Ihre Aufgabe ist die effiziente Unterstützung der Gemeinschaftsmitglieder in den Kommunikations-, Koordinations- und Kooperationsprozessen der Zusammenarbeit [1]."

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Beaton, Douglas Brian. "Implementation and evaluation of a coupled thermal-structural analysis module for laminated composites in an open-source finite element code." Thesis, University of British Columbia, 2010. http://hdl.handle.net/2429/29125.

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The aerospace industry invests heavily in the design and manufacture of composite materials. Aircraft components are produced by placing unprocessed composite materials in an autoclave and applying heat and pressure. The desired part geometry is achieved by forming raw composite materials around a tool, typically made of aluminum or other metal. Throughout the cure cycle, temperature changes cause the part and tool to expand at different rates. This differential expansion, combined with composite material properties that evolve over time, produces residual stresses in the part and leads to geometric instabilities (warpage) upon removal from the tool. Excessive warpage can render a part unusable. Errors of this nature can be quite costly, particularly in the aerospace industry where the tools created can be very large. A strong desire exists to predict the warpage and residual stresses imposed by the curing process and incorporate these stresses in the structural design of a component. To accomplish this goal for complex geometries, special additions to the finite element method are required. Commercial finite element programs provide some flexibility for users to implement custom elements and materials. Though, this flexibility has limits: some material models, such as non-local damage models, cannot be incorporated in proprietary software. This work selects an open-source finite element program and implements the ability to model curing processes of composite materials. The thermal and structural equations are solved in a coupled manner during each time step. This contrasts previous work by the UBC Composites Group, wherein the heat equation is solved over the entire model before the structural equations are considered. Numerous verification models are run to confirm the implementation, along with several example problems. Recommendations are made for further work to improve the process modeling and facilitate a link to subsequent structural models. Ultimately, the code produced represents the first step in seamlessly modeling composite structures during manufacturing processes through to in-service conditions.

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Matti, Erik. "Evaluation of open source web vulnerability scanners and their techniques used to find SQL injection and cross-site scripting vulnerabilities." Thesis, Linköpings universitet, Institutionen för datavetenskap, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-177606.

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Both for its simplicity and efficiency to search for the most critical security vulnerabilities that could exist within a web application, a web vulnerability scanner is a popular tool among any company that develops a web application. With the existence of many different scanners that are available to use, one is unlikely the same as the other and the results attained when evaluating these scanners in relation to each other are often not the same. In this thesis, three different open source web vulnerability scanners are evaluated and analysed based on their ability to find SQL injection and cross-site scripting vulnerabilities. The scanners were used on several open source deliberately broken web applications that acted as benchmarks. The benchmarks that caused much diversity in the results from the scanners were further investigated. When analysing the scanners based on the results, both the actual results were analysed on what caused the diversity but most of all the source code of the scanners were explored and investigated. It could be found that the techniques used by the scanners were essentially similar but contained several minor differences that caused the diversity in the results. Most differences were dependant on the variation of the predefined payloads injected by the scanners, but it could also be found that the approaches used to determine if a vulnerability was detected or not could vary as well. The finalised result concluded in a report that reveals and demonstrates the different approaches that any web vulnerability scanner could use and the limitations of them.

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Glynn, Martin (Martin Oliver). "Evaluating potential open source applications : a case study of the network attached storage industry." Thesis, Massachusetts Institute of Technology, 2007. http://hdl.handle.net/1721.1/42361.

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Thesis (S.M.)--Massachusetts Institute of Technology, System Design and Management Program, 2007. Includes bibliographical references (p. 72). The open source model for software development has been established as a legitimate competitor to the largest closed source software firms in the world. The purpose of this thesis is to investigate the potential impact that the open source model can have with in the information storage industry. The existing literature regarding open source is reviewed and used as a framework for analysis of the storage industry. Additional analysis of the FreeNAS open source storage project is also conducted using the framework to provide context. The research concludes that the information storage industry meets many of the criteria that have been shown to drive adoption of open source software. Some speculation is made regarding the manner in which open source will continue to expand within the storage industry. by Martin Glynn. S.M.

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Jahn, Sascha. "Analyse von Open-Source-Software zur Unterstützung operativer Virtueller Unternehmen – eine Bewertungsmethode am Beispiel der Biotechnologie-Branche." Technische Universität Dresden, 2004. https://tud.qucosa.de/id/qucosa%3A29569.

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Aus der Einleitung: "Virtuelle Organisationen sind zu einem festen Bestandteil des wirtschaftlichen und gesellschaftlichen Gesamtgefüges geworden. Ihre Mitglieder verfolgen mit ihnen ein gemeinsames Ziel, arbeiten dabei zeitlich und räumlich verteilt und überwinden sowohl Unternehmensgrenzen als auch kulturelle Barrieren. Als Enabler ihrer zielgerichteten, arbeitsteiligen Prozesse dient hierbei die Informations- und Kommunikationstechnologie (IuK). Ihre Aufgabe ist die effiziente Unterstützung der Gemeinschaftsmitglieder in den Kommunikations-, Koordinations- und Kooperationsprozessen der Zusammenarbeit [1]."

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Santos, Jr Carlos D. "OPEN SOURCE SOFTWARE PROJECTS' ATTRACTIVENESS, ACTIVENESS, AND EFFICIENCY AS A PATH TO SOFTWARE QUALITY: AN EMPIRICAL EVALUATION OF THEIR RELATIONSHIPS AND CAUSES." OpenSIUC, 2009. https://opensiuc.lib.siu.edu/dissertations/2.

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An organizational strategy to develop software has appeared in the market. Organizations release software source code open and hope to attract volunteers to improve their software, forming what we call an open source project. Examples of organizations that have used this strategy include IBM (Eclipse), SAP (Netweaver) and Mozilla (Thunderbird). Moreover, thousands of these projects have been created as a consequence of the growing amount of software source code released by individuals. This expressive phenomenon deserves attention for its sudden appearance, newness and usefulness to public and private organizations. To explain the dynamics of open source projects, this research theoretically identified and empirically analyzed a construct – attractiveness – found crucial to them due to its influence on how they are populated and operate, subsequently impacting the qualities of the software produced and of the support provided. Both attractiveness' causes and consequences were put under scrutiny, as well as its indicators. On the side of the consequences, it was theoretically proposed and empirically tested whether the attractiveness of these projects affects their levels of activeness, efficiency, likelihood of task completion, and time for task completion, though not linearly, as task complexity could moderate the relationships between them. Also, it was argued at the theoretical level that activeness, efficiency, likelihood of task completion, and time for task completion mediate the relationship between attractiveness and software/support quality. On the side of attractiveness' causes, it was proposed and tested that five open software projects' characteristics (license type, intended audience, type of project and project’s life-cycle stage) impact attractiveness directly. Additionally, these projects' characteristics were argued to influence projects' levels of activeness, efficiency, likelihood of task completion, and time for task completion (and so an empirical evaluation of their associations was performed). The empirical tests of all these relationships between constructs were carried out using Structural Equation Modeling with Maximum Likelihood on three samples of over 4,600 projects each, collected from the largest repository of open source software, Sourceforge.net (a repeated cross-sectional approach). The results confirmed the importance of attractiveness, suggesting a direct influence on projects' dynamics, as opposed to the moderated-by-task complexity indirect paths first proposed. Furthermore, all four projects' characteristics studied were found to significantly influence projects' attractiveness, activeness, efficiency, likelihood of task completion, and time for task completion (with the exception of license type and time for task completion). Besides providing a statistical test of these propositions, this study discovered the direction of the influence of each project characteristic on projects' attractiveness, activeness, efficiency, likelihood of task completion and time for task completion. Lastly, conclusions, limitations, and future directions are discussed based on these findings.

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Pomahač, Lukáš. "Vybrané nástroje projektového managementu - analýza a praktická aplikace." Master's thesis, Vysoká škola ekonomická v Praze, 2011. http://www.nusl.cz/ntk/nusl-85300.

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The main goal of the theses is the analysis and selection of open-source, web-based project management tools for support of project management. The theoretical chapter focuses on basic project management definitions and functions. The methodological chapter briefly describes multi-criteria decision-making and other methods used in the practical section. The practical chapter includes a short summary of the IQUAP Czech Republic, Ltd. Company, then research on available project management tools, two round multi-criteria evaluation of the selected tools, selection and pilot testing of the final tool TeamLab, evaluation of the pilot testing by using questionnaires. The main benefit of the theses is the analysis and evaluation of the project management tools in relation to the utilization within practice.

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Santos, Carlos. "Open source software projects' attractiveness, activeness, and efficiency as a path to software quality : an empirical evaluation of their relationships and causes /." Available to subscribers only, 2009. http://proquest.umi.com/pqdweb?did=1879096191&sid=2&Fmt=2&clientId=1509&RQT=309&VName=PQD.

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Thesis (Ph. D.)--Southern Illinois University Carbondale, 2009. "Department of Management." Keywords: Business strategy, Open source software, Software community, Software development, Software quality, Structural equation modeling. Includes bibliographical references (p. 119-124). Also available online.

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Alm, Anton, and Joakim Björling. "Prestandautvärdering av firmwares baserade på öppen källkod för routrar/brandväggar på MIPS-arkitektur : Jämförelse mellan Open-WRT, DD-WRT och Tomato firmware." Thesis, Linnéuniversitetet, Institutionen för datavetenskap (DV), 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-36007.

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Den här undersökningen jämför prestanda hos tre olika firmwares som är baserade på öppen källkod. DD-WRT, Open-WRT samt Tomato Firmware för MIPS-arkitektur. Testerna följer två RFC som beskriver hur en prestandaanalys av ett nätverk ska genomföras. De sammanfattade resultaten pekar på en vinnare som presterat generellt bättre genom alla tester och det var Tomato firmware. Dessa resultat är hämtade från tre olika tester: genomströmningstest, svarstidstest och test med samtidiga sessioner. Undersökningen visar också att prestandan rent generellt är väldigt jämlik över alla firmwares i de olika testerna. En viktig aspekt är att det finns ingen överlägsen vinnare, vilket beror på, till exempel, hur konsekventa resultaten varit. Detta hänger även ihop med en möjlig slutsats där firmwaresen presterar olika bra beroende på vilken typ av uppgift det gäller. Som fortsatt arbete rekommenderas prestanda och funktionsanalys av liknande verktyg som varje firmware innehåller. Även en undersökning gällande gränssnittet för varje firmware skulle vara intressant. This investigation compares the performance of three different open-source firmwares. DD-WRT, Open-WRT and Tomato Firmware with MIPS architecture. The test follows two RFC that describes the process of how to perform a performance analysis of network interconnected devices. The summarized results show a winner which has generally performed better throughout all the tests and this was Tomato firmware. These results are gathered from three different tests, which is throughput, latency and concurrent sessions test. The survey also shows that the performance in general is very equal across all firmwares in the various tests. An important aspect is that there are no outstanding winner, which depends on for example how consistent the results have been. This also concerns a possible conclusion where the firmwares perform various well depending on the type of task involved. As further work on this investigation we recommend a performance and function analysis of the tools that the firmware contains. Although a survey of the interface for each firmware would be interesting.

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Musasa, Mutombo Mike. "Evaluation of embedded processors for next generation asic : Evaluation of open source Risc-V processors and tools ability to perform packet processing operations compared to Arm Cortex M7 processors." Thesis, KTH, Skolan för elektroteknik och datavetenskap (EECS), 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-299656.

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Nowadays, network processors are an integral part of information technology. With the deployment of 5G network ramping up around the world, numerous new devices are going to take advantage of their processing power and programming flexibility. Contemporary information technology providers of today such as Ericsson, spend a great amount of financial resources on licensing deals to use processors with proprietary instruction set architecture designs from companies like Arm holdings. There is a new non-proprietary instruction set architecture technology being developed known as Risc-V. There are many open source processors based on Risc-V architecture, but it is still unclear how well an open-source Risc-V processor performs network packet processing tasks compared to an Arm-based processor. The main purpose of this thesis is to design a test model simulating and evaluating how well an open-source Risc-V processor performs packet processing compared to an Arm Cortex M7 processor. This was done by designing a C code simulating some key packet processing functions processing 50 randomly generated 72 bytes data packets. The following functions were tested: framing, parsing, pattern matching, and classification. The code was ported and executed in both an Arm Cortex M7 processor and an emulated open source Risc-V processor. A working packet processing test code was built, evaluated on an Arm Cortex M7 processor. Three different open-source Risc-V processors were tested, Arianne, SweRV core, and Rocket-chip. The execution time of both cases was analyzed and compared. The execution time of the test code on Arm was 67, 5 ns. Based on the results, it can be argued that open source Risc-V processor tools are not fully reliable yet and ready to be used for packet processing applications. Further evaluation should be performed on this topic, with a more in-depth look at the SweRV core processor, at physical open-source Risc-V hardware instead of emulators. Nätverksprocessorer är en viktig byggsten av informationsteknik idag. I takt med att 5G nätverk byggs ut runt om i världen, många fler enheter kommer att kunna ta del av deras kraftfulla prestanda och programerings flexibilitet. Informationsteknik företag som Ericsson, spenderarmycket ekonomiska resurser på licenser för att kunna använda proprietära instruktionsuppsättnings arkitektur teknik baserade processorer från ARM holdings. Det är väldigt kostam att fortsätta köpa licenser då dessa arkitekturer är en byggsten till designen av många processorer och andra komponenter. Idag finns det en lovande ny processor instruktionsuppsättnings arkitektur teknik som inte är licensierad så kallad Risc-V. Tack vare Risc-V har många propietära och öppen källkod processor utvecklats idag. Det finns dock väldigt lite information kring hur bra de presterar i nätverksapplikationer är känt idag. Kan en öppen-källkod Risc-V processor utföra nätverks databehandling funktioner lika bra som en proprietär Arm Cortex M7 processor? Huvudsyftet med detta arbete är att bygga en test model som undersöker hur väl en öppen-källkod Risc-V baserad processor utför databehandlings operationer av nätverk datapacket jämfört med en Arm Cortex M7 processor. Detta har utförts genom att ta fram en C programmeringskod som simulerar en mottagning och behandling av 72 bytes datapaket. De följande funktionerna testades, inramning, parsning, mönster matchning och klassificering. Koden kompilerades och testades i både en Arm Cortex M7 processor och 3 olika emulerade öppen källkod Risc-V processorer, Arianne, SweRV core och Rocket-chip. Efter att ha testat några öppen källkod Risc-V processorer och använt test koden i en ArmCortex M7 processor, kan det hävdas att öppen-källkod Risc-V processor verktygen inte är tillräckligt pålitliga än. Denna rapport tyder på att öppen-källkod Risc-V emulatorer och verktygen behöver utvecklas mer för att användas i nätverks applikationer. Det finns ett behov av ytterligare undersökning inom detta ämne i framtiden. Exempelvis, en djupare undersökning av SweRV core processor, eller en öppen-källkod Risc-V byggd hårdvara krävs.

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Fink, Caleb D. "Developing, Evaluating, and Demonstrating an Open Source Gateway and Mobile Application for the Smartfarm Decision Support System." DigitalCommons@CalPoly, 2018. https://digitalcommons.calpoly.edu/theses/1880.

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The purpose of this research is to design, develop, evaluate, and demonstrate an open source gateway and mobile application for the SmartFarm open source decision support system to improve agricultural stewardship, environmental conservation, and provide farmers with a system that they own. There are very limited options for an open source gateway for collecting data on the farm. The options available are: expensive, require professional maintenance, are not portable between systems, improvements are made only by the manufacturer, limited in customization options, difficult to operate, and data is owned by the company rather than the farmer. The gateway is designed to send data to the cloud from remote SmartFarm Data Acquisition (DAQ) nodes, collect measurement data from remote SmartFarm DAQ nodes, provide a means of wirelessly programming remote SmartFarm DAQ nodes, and a tool that provides data analysis and insight from remote SmartFarm DAQ nodes. It is evaluated to work with 900MHz radios, SmartFarm DAQ nodes, and costs $35. Its setup takes 4 steps and ~20 minutes installation time, does not require maintenance, can utilize Wi-Fi, Bluetooth, and other wireless protocols, and software can port to other systems. The gateway measured data rate of 93.4Mbit/s internet upload speed, passing a range of 252 to 1592 bytes of data from a remote node to the cloud, consumes 2.8 Watts, with a software efficiency of 25% CPU usage, a measurement efficiency of 1 message every 15 seconds, can provide data analysis with the cloud service tool, and it can wirelessly program remote DAQ nodes. The goal of the mobile app is educating farmers, academia, and community members, of farming sustainably today, and for the future. The app is used as a tool to aid people in farming sustainably, teaching agricultural stewardship, and teaching environmental conservation. The app is evaluated with adaptation of 85.1%, frequency of use at 0.12 respondents/minute, and 22 respondents said they find the SmartFarm DSS as beneficial. By developing, evaluating, and demonstrating the gateway and mobile app, the SmartFarm decision support system is a viable option for improving agricultural stewardship and retaining farmers’ ownership of their data.

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Sjögren, Eric. "Evaluating Voice over IP phone implementation on a freescale Cortex A9 processor running Linux using open source SIP and WebRTC." Thesis, Umeå universitet, Institutionen för datavetenskap, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-128405.

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Voice over IP (VoIP) is a methodology that refers to the delivery of multimedia and voice sessions over an Internet connection and it provides an alternative to regular voice calls using phone lines, usually referred to as the Public Switched Telephone Network (PSTN). Web Real-Time Communication (WebRTC) is an API denition for browser-to-browser VoIP applications; the denition acts as a foundation for applications using voice, video, chat, and P2P le sharing in a browser environment without the need of either internal or external plugins. To allow WebRTCto make calls to non-WebRTC VoIP applications, a initiation protocol (which is not included in the WebRTC implementation looked at here, i.e., the one released by Google) is needed. One such protocol is the Session Initiation Protocol (SIP), which is the standard protocol used for initialising, changing and terminating interactive sessions for multimedia today; it is particularly known for its use in VoIP applications. In this thesis, we evaluate the possibility of the creation of a WebRTC implementation using SIP (this type of implementation is referred to as WebRTC-SIP) that runs on an ARM A9 processor architecture. The evaluation is split into two steps. The first step consists of analysingand performing tests of the Linux audio drivers on an ARM platform. The tests are used to determine how a WebRTC-SIP application could affect the audio drivers on such a platform. The second step involves implementation of a WebRTC VoIP application using SIP in a browse renvironment. The measurements done on the audio drivers show that they can cope with the CPU load created by a WebRTC-SIP application. Based on this and the knowledge gained from implementing such an application for use in a browser, two theoretically possible implementation methods are presented. The first solution builds on the WebRTC-SIP application done in step two, which utilises the support of WebRTC that is built into many browsers to power the application. The second solution is a application which uses a WebRTC to SIP gateway to allow it to set up calls to non-WebRTC applications.

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Pearce, Michael Bruce. "Development and evaluation of a secure web gateway with messaging functionality : utilizing existing ICAP and open-source tools to notify and protect end users from Internet security threats." Thesis, University of Canterbury. Computer Science and Software Engineering, 2010. http://hdl.handle.net/10092/5457.

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Secure web gateways aim to protect end user systems against web based threats. Many proprietary commercial systems exist. However, their mechanisms of operation are not generally publicly known. This project undertook development and evaluation of an open source and standards based secure web gateway. The proof of concept system developed uses a combination of open source software (including the Greasyspoon ICAP Server, Squid HTTP proxy, and Clam Antivirus) and Java modules installed on the ICAP server to perform various security tasks that range from simple (such as passive content insertion) to more advanced (such as active content alteration). The makeup of the proof of concept system and the evaluation methodology for both effectiveness and performance are discussed. The effectiveness was tested using comparative analysis of groups of self-browsing high interaction client honey pots (employing a variety of security measures) and recording different system alteration rates. Performance was tested across a wide range of variables to determine the failure conditions and optimal set up for the components used. The system developed met the majority of the goals set, and results from testing indicate that there was an improvement in infection rates over unprotected systems. Performance levels attained were suitable for small scale deployments, but optimization is necessary for larger scale deployments.

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Balac, J. M. (Juho-Mikko). "Introducing usability activities into open source software development:impacts of contributed usability evaluations to the community and existence of HCI and OSS philosophies: case Concrete5." Master's thesis, University of Oulu, 2016. http://urn.fi/URN:NBN:fi:oulu-201605221865.

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Usability is one of the software quality attributes and plays an important role in information systems success, technology acceptance and adoption models. Usability is a product of user interaction design and can be evaluated using usability testing and inspection methods. The usability of open source software (OSS) systems has had a poor reputation. The reasons for poor usability are cultural and software engineers have designed software for their own needs and for tech-savvy users, and thus, usability is not the primary objective. Also, usability experts do not participate much to OSS development. Sometimes they are not welcome or it is difficult to show their merits without contributing code. However, usability of OSS product is getting better as user- centred movement has been closing the gap between users and programmers. The aim of this thesis is to examine the impacts usability evaluations to an open source software community and to find out the existence of core human-computer interaction and open source software philosophies during the project. The research method used in this study is longitudinal interpretive case study and the research material consists of usability evaluation project material, email correspondence with the community and publicly available information provided by the community and its members. The attitudes of the target open source software community towards usability and usability activities were mainly positive. After the first contribution, a project leader asked for more activities and after contributing three sets of activities for different versions of the software, the project leader rated them as beneficial. Furthermore, most of the core human computer interaction (HCI) and OSS philosophies existed. The characteristics of HCI philosophy found during the usability project were that usability specialists were user representatives in informative and consultative roles, knowing the user, speaking for the user in the development and sticking with the user focus. The following characteristics of OSS philosophy were found: the selection of the target community was based on one usability specialist scratching his own itch, the software was seen as a communal resource, collaboration was voluntary, interaction with the community was loose, usability specialists acted as bug reporters and designers gaining merit and reputation through contributing to the community. This thesis contributes to the existing literature of introducing usability activities into open source software development by examining a new case study. Compared to the prior research, a new instantiation of OSS philosophy characteristic, “scratching your own itch” was found.

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K, C. Sandeep. "Platform Independent Connections to Internet of Things." Thesis, Mittuniversitetet, Avdelningen för informations- och kommunikationssystem, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:miun:diva-24787.

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In the past few years, technology has been changing by leaps and bounds, within which a new topic has emerged as Internet of Things. These things serve as sensors/actuators, connected to the Internet and enabled to communicate with each other simultaneously in a P2P distributed manner. The sensors/actuators sense and generate contextual data in their surroundings in order to enable real-time context-aware behavior that make them more personalized and intelligent. This contextual information may be useful for human purposes like environment monitoring, home surveillance, elderly care, safety, security surveillance, etc. Moreover, smart mobile devices with incredible features have become hugely popular, the use of the Internet of Things would be much handier using smartphones to interact with sensors and also to generate information with its decorated sensors. The main aim of this thesis work is to create an extension for an add-in layer of the Internet of Things (SensibleThings Platform) architecture that adds functionalities like querying UCI value within the platform, connecting different mobile devices regardless of programming language, which has been done using the REST protocol. Furthermore, the intention is to build a P2P connection between the Java coded SensibleThings platform to a non-Java platform, i.e. iOS, by creating an Objective-C library to support dissemination of contextual information between the discrete platform in a distributed manner using JSON. Two servers have been created using Apache web server and sockets to connect with the Objective-C library to compare the performance of extension and library. The thesis work also presents the implementation of the extension and an Objective-C library, integrated to create proof-of-concept applications by developing an iOS application and Mac OS desktop application that can easily interact with the SensibleThings platform by requests through the REST protocol and getting the UCI value in JSON message format. Moreover, to know the best possible solution for the SensibleThings platform, a hybrid application has also been developed by using PhoneGap and JQueryMobile within XCode, which is compared with the iOS web app, and an evaluation of mobile applications using extension and library with two servers has also been performed. According to the results between the web server and sockets, the sockets act scalable and more stable than the web server when interacting with the SensibleThings platform; when comparing between the iOS and Mac app for performance, there is not much difference. The results also suggest that a hybrid app would be a better solution for the SensibleThings platform; it could be developed with less effort and be useful for a variety of mobile devices, which might be the best solution for the IoT in the future. Lastly, the conclusions includes possible future work to be supplemented, to make the IoT better in future.

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Acosta, Roberto S. M. Massachusetts Institute of Technology. "Open source hardware." Thesis, Massachusetts Institute of Technology, 2009. http://hdl.handle.net/1721.1/55201.

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Thesis (S.M.)--Massachusetts Institute of Technology, System Design and Management Program, 2009. Cataloged from PDF version of thesis. Includes bibliographical references (p. 82-83). Open source software development models have created some of the most innovative tools and companies in the industry today modifying the way value is created and businesses developed. The purpose of this thesis is to analyze open source hardware in its current state and its potential impact at several stages of the value chain. Existing examples of open source hardware at different stages of the value chain are analyzed in terms of their innovation and potential impact to existing players in the value chain. An Ethernet framer is develop through the use of traditional development and benchmarked against a design developed based on open source hardware cores. The research concludes with an examination of business models established around open source hardware. by Roberto Acosta. S.M.

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Jakobson, Fredrik. "Open source routing software : A comparative study of open source software routers." Thesis, Högskolan i Skövde, Institutionen för informationsteknologi, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:his:diva-9520.

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As the performance of PCs is increasing it is of great interest to use these cheap devices as routers,which traditionally consisted of more expensive and customized hardware for that purpose. Thesoftware was also traditionally proprietary and thereby costly, but as the open source communityhas grown there have been development of open source solutions that can perform the task ofacting as a router. However as there are so many solutions out there, it can be hard for the potentialusers to choose which particular solution to use, without having to put in too much work intogetting a fully functional router solution. This study achieved this purpose by benchmarking themost popular open source software routers, in terms of performance and scalability as well asproviding a brief analysis of their basic security features. The routers that were studied wasClearOS, Untangle NG Firewall and IPFire, and after the study was complete IPFire was consideredthe superior with ClearOS as the second and Untangle as third and last.

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Ježek, Jiří. "Open Source implementace IMS." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2020. http://www.nusl.cz/ntk/nusl-413075.

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The diploma thesis deals with open source implementations of IMS technology. The theoretical part describes the functioning of IMS and its architecture, including the protocols used, the process of registration and connection establishment, as well as potential security threats to IMS systems. Two open source IMS projects were selected, Open IMS Core and Project Clearwater, on which the work is focused. In its next part, the diploma thesis deals with the description of selected open source IMS projects, this part also includes a description of the implemented security of both projects and a detailed procedure of system installation with any necessary configuration. In its practical part, the diploma thesis focused on performance testing of selected projects using the Abacus 5000 hardware tester. First, initialization tests were performed, which verified the possibility of communication between the tester and the tested projects. Subsequently, it was possible to perform performance testing of selected projects. In performance testing, emphasis is placed on system stability, performance in the area of call set-up speed and response time of SIP messages and speed of user registration in the network, at different load levels. The systems have been tested for both call set-up and user registration. Part of the testing is also the implementation of the flood DoS inviteflood attack and the system's response to the increasing intensity of the attack. The last chapter is devoted to the comparison of selected IMS projects, where the test results are clearly presented. This chapter is partly based on publicly available information, such as the technical documentation of individual projects and possibly publicly available mailing lists. Part of the diploma thesis is also a laboratory task in which the student tries to work with Open IMS Core. The laboratory task focuses on the process of creating a user and his registration in the IMS network, establishing a call between individual users and internal routing in IMS networks. The task focuses mainly on signaling processes within the implemented tasks.

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Li, Zhuoxuan. "Open source hardware entrepreneurship." Thesis, Massachusetts Institute of Technology, 2020. https://hdl.handle.net/1721.1/127724.

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Thesis: Ph. D., Massachusetts Institute of Technology, Department of Mechanical Engineering, 2020 Cataloged from PDF of thesis. Includes bibliographical references (pages 136-145). Having overturned the traditional producer-led, in-house production model of software, open source entered the physical world and started to change physical products' development and commercialization process. Will open source diversify the hardware world as it did in software 20 years ago? Since mid-2000, engineer entrepreneurs were observed to have purposefully chosen to abandon the intellectual properties of their products and licensed the design under open source licenses. As a consequence, public are allowed to participate to the product design processes from an early phase and interact with firms in an open, transparent way. It is reasonable to consider this extreme openness as a high risk move for hardware startup-level firms, who are normally resource-scarce, capital-intense and loosely organized. Then, the research questions come as how open source hardware firms generate profit and manage risks? Can open source model be a sustainable hardware development model in an entrepreneurial setting? Using data collected from 66 open source hardware firms over 4 years across 21 countries, the research questions were answered with a series of four research projects. In brief, the success of open source model in entrepreneurial activities is a result of dynamic design of organizational openness and community governance mechanism according to firm's business model and community's social needs, so that firms are able to exploit community value brought by being open and mitigate risks associated. Open source hardware entrepreneurship can serve as an extreme application of open innovation and user innovation theories in hardware venture creation, and we hope to use this work as a pilot study for the emerging socio-technological phenomenon. by Zhuoxuan Li. Ph. D. Ph.D. Massachusetts Institute of Technology, Department of Mechanical Engineering

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Nilsson, Mats. "Open Source Business Models." Thesis, Blekinge Tekniska Högskola, Avdelningen för programvarusystem, 2002. http://urn.kb.se/resolve?urn=urn:nbn:se:bth-3950.

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This thesis is describing a business strategy of how to license a software product. The licenses discussed in this thesis are called open source licenses. The open source licenses have gained much attention lately by companies such as Microsoft, IBM, and Sun Microsystems. The reason for this is that some products considered being open source software are very widely used. These products include the most popular web server, the Apache web server, with more than 60% market share. 25% of the installed operating systems that are running Apache and other web servers are installed with Linux as operating system, which is also considered as open source software. These are only two examples of popular products that are considered as open source software products. These products are choices for many people and companies when choosing software to use, for example NASA. Open source licenses are called open in the way that the software is shipped not only in binary form, but also with the source code that can be modified and recompiled to suit the buyer’s need better. Apache web server and the Linux operating system are free for download, install, run and modify to suit your needs. In this thesis I will discuss whether these licenses can increase the chance of developing a successful product or not, in terms of market shares. Affärsmodeller kring öppen källkod diskuteras i denna magisteruppats. Det finns ett flertal programvaror byggd på öppen källkod som kan betraktas som framgångsrika om man avser antal användare eller hur stora marknadsandelar produkterna har. Diskussionen i magister uppsatsen kretsar därför om man kan öka sina chanser att utveckla framgångsrika produkter genom att använda sig av öppen källkod främst ur ett företags perspektiv som har vinstintresse. Mats Nilsson Kabelgatan 13D 414 57 Göteborg

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Turull, Torrents Daniel. "Open Source Traffic Analyzer." Thesis, KTH, Telekommunikationssystem, TSLab (stängd 2012-01-01), 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-38322.

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Proper traffic analysis is crucial for the development of network systems, services and protocols. Traffic analysis equipment is often based on costly dedicated hardware, and uses proprietary software for traffic generation and analysis. The recent advances in open source packet processing, with the potential of generating and receiving packets using a regular Linux computer at 10 Gb/s speed, opens up very interesting possibilities in terms of implementing a traffic analysis system based on open-source Linux. The pktgen software package for Linux is a popular tool in the networking community for generating traffic loads for network experiments. Pktgen is a high-speed packet generator, running in the Linux kernel very close to the hardware, thereby making it possible to generate packets with very little processing overhead. The packet generation can be controlled through a user interface with respect to packet size, IP and MAC addresses, port numbers, inter-packet delay, and so on. Pktgen was originally designed with the main goal of generating packets at very high rate. However, when it comes to support for traffic analysis, pktgen has several limitations. One of the most important characteristics of a packet generator is the ability to generate traffic at a specified rate. Pktgen can only do this indirectly, by inserting delays between packets. Moreover, the timer granularity prevents precise control of the transmission rate, something which severely reduces pktgen’s usefulness as an analysis tool. Furthermore, pktgen lacks support for receives ide analysis and statistics generation. This is a key issue in order to convert pktgen into a useful network analyser tool. In this paper, improvements to pktgen are proposed, designed, implemented and evaluated, with the goal of evolving pktgen into a complete and efficient network analysis tool. The rate control is significantly improved, increasing the resolution and improving the usability by making it possible to specify exactly the sending rate. A receive-side tool is designed and implemented with support for measurement of number of packets, throughput, inter-arrival time, jitter and latency. The design of the receiver takes advantage of SMP systems and new features on modern network cards, in particular support for multiple receive queues and CPU scheduling. This makes it possible to use multiple CPUs to parallelize the work, improving the overall capacity of the traffic analyser. A significant part of the work has been spent on investigating low-level details of Linux networking. From this work we draw some general conclusions related to high speed packet processing in SMP systems. In particular, we study how the packet processing capacity per CPUdepends on the number of CPUs. This work consists of minimal set of kernel patches to pktgen.

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Du, Preez Jacobus Andries. "Novells open source evolution a case study in adapting open source business strategies /." Pretoria : [s.n.], 2006. http://upetd.up.ac.za/thesis/available/etd-03102006-171345.

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Möller, Steffen. "Open-source-Software : eine multiperspektivische Analyse der Implementierung von Open-source-Software in Unternehmen /." Göttingen : Cuvillier, 2006. http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&doc_number=014916224&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA.

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Westin, Andreas. "Open Source i svenska folkbibliotek." Thesis, Umeå University, Sociology, 2006. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-848.

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Syftet med uppsatsen är att sammanställa vad Open Source är och försöka kartlägga hur användningen av Open Source-program ser ut på de svenska folkbiblioteken.Jag tittar även på vilka Open Source-program som kan vara aktuella för ett bibliotek att titta närmare på. Resultatet visar att Open Source inte används i någon större utsträckning men att man är positivt inställd till rörelsen. Några få program har börjat användas men man är orolig för hur supporten fungerar för Open Source-program, sen verkar biblioteken inte ha någon större kontroll över vilka program som faktiskt används utan är styrda av de regler som kommunens IT-avdelning har satt upp.

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Leon, Fernandez Oscar. "Renovating an Open Source Project." Thesis, Växjö University, School of Mathematics and Systems Engineering, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:vxu:diva-5503.

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Renovate a program is always a hard work and full of problems. It requires a good knowledge of the old program and research and investigation. RECODER is a tool for supporting static metaprogramming of Java program sources. This tool has been patches over and over again since the new versions of Java were coming out. Because of that the code starts to be dirty and with a lot of patches. In order to clean up the implementation the code should be renovated.In this thesis, we present the changes that were introduced to the grammar and the implementation of the new parser for RECODER using a different technology. RECODER

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Haustein, Mario. "Open-Source-Tools für Amateurastronomen." Universitätsbibliothek Chemnitz, 2009. http://nbn-resolving.de/urn:nbn:de:bsz:ch1-200901933.

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Bekanntlich gibt es für fast jede erdenkliche Aufgabe ein Open-Source-Programm. Bis auf einige Ausnahmen ist das Angebot an Software für Amateurastronomen allerdings recht unübersichtlich. Der Vortrag soll deshalb eine Übersicht über verschiedene Software-Projekte geben, die für Astrofotografie und astronomische Beobachtungen nützlich sind. Einfache Demonstrationen werden die Einsatzmöglichkeiten dieser Programme verdeutlichen und sollen dazu anregen, den Nachtimmel selbst mit Feldstecher und Kamera zu erkunden.

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Rosenfall, Thomas. "Open Source Vendors’ Business Models." Doctoral thesis, Linköpings universitet, Industriell marknadsföring och industriell ekonomi, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-76737.

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It may seem controversial that open-source software (OSS), i.e. software created by voluntary contributions that is available to use, change, and distribute for free, can be utilized for business purposes. Yet, for some firms, commercial OSS software products are the primary source of revenue. In this thesis, these companies are referred to as OSS vendors. Although some OSS vendors have existed for more than thirty years, how they conduct their business has not been extensively studied. Business models as a concept has been widely used in the information and communications technology (ICT) industry, often when describing firms working with OSS. In that context business models often refer to the offering, i.e. the products the firm offers to its customers and how revenues are collected. However, in academia the business model concept has evolved in a broader sense encompassing several fields and into a rich theoretical field itself. This thesis aims to further the understanding on how OSS vendors conduct their business, by using a business model framework, which has been constructed from business model and management theories. This framework was used to study OSS vendors to investigate the configurations of their business models. A cross-case analysis of four carefully selected OSS vendors searched for generic patterns in these configurations. Furthermore, the cases were also studied regarding sustainability and profitability. Two generic business model configurations were found, community immersion and community utilization. OSS vendors found configured according to the community immersion business model are deeply involved with, but also dependent on, the main community project that provides the software for the offering. OSS vendors found configured according to the community utilization business model are not dependent on the OSS project to provide their commercial offerings. Rather, the communities are used in marketing providing brand benefits, a base for recruitment, and in lesser degree functioned as quality assurance. Two of the four studied companies were found to be profitable and sustainable; one operating according to the community immersion business model and the other according to the community utilization business model. The other two companies studied, observed to operate according to the community utilization business model, did not achieve profitability during the time of the study. The findings should further the understanding of how profitable OSS vendors’ business models could be configured, and thus provide practitioners with an understanding on how different business model configurations can affect their strategies and overall business.

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Fleischmann, Ino David. "Open Source and Living Systems." Doctoral thesis, Universitat Jaume I, 2017. http://hdl.handle.net/10803/405428.

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The dissertation investigates the approach of open source hardware and its potential for a “post-growth” transformation of society, which, from an environmentalist perspective, seems necessary. Hereby it elaborates the paradigm shift attached to the idea of open source, compares them with living systems in nature and practically contributes to the open source movement in the field of rural electrification. By doing so, it compares renewable energy technologies for rural electrification from the perspective of open source applicability. The practical output hereby is the design of an open source licensed hydro power turbine, called “Pico Cross Flow”. The dissertation covers the hydraulic and mechanical design as well as the manufacturing of a prototype and the testing at the hydrodynamic laboratory of the University of Viena La disertación investiga la idea de “open source hardware” (hardware de código abierto) y su potencial para una transformación social de "post-capitalismo", la cual, desde una perspectiva ambientalista, parece necesaria. Se elabora el cambio de paradigma asociado a las ideas de código abierto, se compara con los sistemas vivos en la naturaleza y prácticamente contribuye al movimiento de fuente abierta (open source) en el campo de la electrificación rural. El resultado práctico es el diseño de una turbina hidroeléctrica licenciado código abierto, denominada "Pico Cross Flow". La parte práctica de la disertación abarca el diseño hidráulico y mecánico, así como la fabricación de un prototipo y las pruebas en el laboratorio hidrodinámico de la Universidad de Viena.

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Allmann, Ivonne [Verfasser]. "Open Source Compliance / Ivonne Allmann." Baden-Baden : Nomos Verlagsgesellschaft mbH & Co. KG, 2019. http://d-nb.info/1183471742/34.

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