Miracle-dz/UniFAR-FTUs huggingface dataset:
A network perspective on open source software development: team formation and community participation

In the past few years there has been a surge in self-organizing voluntary teams and online communities collaborating online to produce goods and services. Open source software development has been frequently identified as an example of new way of organizing production. However, despite the increasing prevalence of open source software development, much is yet to be understood about the dynamics of self-organizing production communities. In this dissertation, we investigate the self-assembly of open source project teams and members’ continued participation in open source user communities. The dissertation consists of two essays. The first essay entitled “Emergence of New Project Teams from Open Source Software Developer Networks: Impact of Prior Collaboration Ties” examines how open source project teams are formed and how individuals self-select into open source project teams. This essay focuses on how the collaborative network of developers influences their choice of newly-initiated projects to participate in. We empirically test the impact of prior collaborative ties with and perceived status of project members on the self-assembly of open source project teams. We find that a developer is more likely to join a project when he has developed strong collaborative ties with the project initiator. He is more likely to join a project when other developers with higher perceived status in the collaborative network have joined the project. In addition, projects that have attracted more developers into their teams are more likely to attract additional developers. In order for open source projects to sustain their development they need to be able to attract and more importantly retain participation of volunteer users and developers. Despite the studies that have examined the dynamics in information-sharing online communities, little research has been conducted to investigate participation continuance in online innovation communities such as open source project communities. In the second essay, we attempt to answer the following research questions: How do communication activities with other members in an innovation community influence an individual’s continued participation? How does an individual’s involvement in the innovation process impact his continued participation? We find that interactions with other community members do influence an individual’s return to the community. However, individual differences do exist in members’ continuance behavior; their level of involvement in the OSSD process has a direct influence on their continued participation in the project community. Overall, the findings suggest that the network that an individual is embedded in influences his choices and behavior in the context of open source software development. The open source collaboration network impacts developers’ choices of new projects to join during the self-assembly process of project teams. In the open source user community interactions between an individual and other community members directly affect his continued participation in the community.
Low angle estimation in MIMO radar

A low angle estimation method in the presence of the multipath for multiple-input multiple-output (MIMO) radar is proposed. The multipath signal model for MIMO radar is constructed with both transmitted multipath and received multipath signals being considered. To reduce the computational burden and retain estimation precision, the beam-space maximum likelihood algorithm is developed for angle estimation. This method overcomes multipath effects for low angle measurement, and only requires one one-dimension search procedure. Simulation results are presented to verify the effectiveness of the proposed method.
Operations management and advanced manufacturing technologies in SMEs

Purpose – Increased requirements for competitiveness, innovation, quality, flexibility and information processing capability has led a number of small and medium‐sized enterprises (SMEs) to implement advanced manufacturing technologies (AMT). Seeks to explore this.Design/methodology/approach – Using a contingency theory perspective, a survey study of 118 Canadian manufacturers was made to determine the performance outcomes of the “fit” or alignment between the critical success factors (CSFs) of operations management in SMEs and their level of proficiency in the use of AMT.Findings – It was found that while increased CSF and AMT assimilation levels directly impact operational performance in terms of increased productivity, cost reductions, flexibility, quality, and integration, a mismatch between the two significantly reduces performance. From an information processing view of the firm, it was also found that increased uncertainty in the SMEs' environment leads to increased CSF levels but not to increased .
Did Plant Patents Create the American Rose?

The Plant Patent Act of 1930 was the first step towards creating property rights for biological innovation: it introduced patent rights for asexually-propagated plants. This paper uses data on plant patents and registrations of new varieties to examine whether the Act encouraged innovation. Nearly half of all plant patents between 1931 and 1970 were for roses. Large commercial nurseries, which began to build mass hybridization programs in the 1940s, accounted for most of these patents, suggesting that the new intellectual property rights may have helped to encourage the development of a commercial rose breeding industry. Data on registrations of newly-created roses, however, yield no evidence of an increase in innovation: less than 20 percent of new roses were patented, European breeders continued to create most new roses, and there was no increase in the number of new varieties per year after 1931.
Investigating the language needs of undergraduatescience students in Libya

Although English for Specific Purposes (ESP) approach is widely applied in science to many non-native speakers around the world, higher education institutions in Libya are striving to remain competitive in on-going changes in the science field. There is an ever increasing demand for communication in English in study and in work places, and some institutions have taken steps to develop newer academic programs as a means to meet students’ needs. However, few studies have been carried out to customise ESP courses to suit the Libyan scientific environment. The primary focus of this study is to explore the language needs of undergraduate science students in Libya. The Needs Analysis Framework was used to investigate the extent of English use among computer science, chemistry and physics undergraduates. For this purpose, multiple-instruments were used including questionnaires, semi-structured interviews, classroom observations and teaching materials. The questionnaires were completed by 127 science students while the semi-structured interviews were conducted with 7 faculty members. The classroom observations were conducted with three classes namely Computer Science, Chemistry and ESP, and teaching materials were collected from each of these subjects. The study reveals that English language is generally needed in the science settings. Moreover, it plays a significant role in computer science in particular, as most of its discourses are conducted in English. However, it plays only a limited role in the teaching of Chemistry and Physics. The study suggests that collaboration between science disciplines and English teachers are needed in terms of the ESP programme if such programmes are to be successful.
Thermal comfort and indoor air quality in rooms with integrated personalized ventilation and under-floor air distribution systems

A comprehensive study comprising physical measurements and human subject experiments was conducted to explore the potential for improving occupants’ thermal comfort and indoor air quality (IAQ) using a personalized ventilation (PV) system combined with an under-floor air distribution(UFAD) system. The integrated PV-UFAD system, when operated at relatively high temperature of the air supplied from the UFAD system, provided comfortable cooling of the facial region, improved inhaled air quality, and decreased the risk of “cold feet,” which is often reported in rooms with UFAD alone. This article explores associations between the physical measurements and human responses in a room served with a PV-UFAD system. The experiments were conducted in a field environmental chamber served by two dedicated systems—a primary air-handling unit (AHU) for 100% outdoor air that is supplied through the PV air terminal devices and a secondary AHU for 100% recirculated air that is supplied through UFAD outlets. Velocity and temperature distribution in the chamber were measured. A breathing thermal manikin was used to measure the heat loss from 26 body segments and to determine the equivalent temperature. The responses of 30 human subjects were collected. The experiments were performed at various combinations of room air and PV air temperatures. The results reveal improved overall thermal sensation and decrease of cold feet complaints, as well as improved inhaled air quality (including perceived air quality) with PV-UFAD in comparison with the reference case of UFAD alone or mixing ventilation with a ceiling supply diffuser. Increase of predicted draft rating with the decrease of the local thermal sensation at the feet was identified. The manikin-based equivalent temperature determined for the face was positively correlated with thermal sensation at the face region. The measured inhaled air quality indices (personalized exposure effectiveness and personalized exposure index) were improved by decreasing PV supply air temperature. The perceived inhaled air freshness increased with the decrease of the inhaled air temperature and increase of facial velocity.
Wpływ sposobu przygotowania powierzchni na wytrzymałość połączeń klejowych blach ze stali odpornej na korozję

Technologia klejenia wykorzystywana jest do lączenia materialow o specyficznych wlaściwościach, z ktorych wykonywane są elementy o roznorodnych ksztaltach lub tez znajdujących sie w roznych miejscach konstrukcji. Za pomocą klejenia mozna lączyc elementy o niewielkich rozmiarach lub o skomplikowanych ksztaltach, czasami trudne do polączenia za pomocą innej technologii, z uwagi np. na brak dostepu lub ograniczenie miejsca w analizowanej konstrukcji. W niektorych przypadkach klejenie jest konkurencyjną metodą wykonywania polączen ze wzgledu na liczne zalety [1 − 4], wśrod ktorych mozna wymienic mozliwośc polączenia roznego rodzaju materialow, w tym m.in. mozliwośc unikniecia korozji elektrochemicznej, otrzymanie lzejszej konstrukcji w porownaniu z innymi technologiami, czy tez uzyskanie rownomiernego rozkladu naprezen (rys. 1) w porownaniu z innymi rodzajami polączen, np. nitowymi czy spawanymi [4].
Indigenous mentoring pilots project 2001-2004: National evaluation report

This project is a national evaluation of the Indigenous Mentoring Pilots Program. The project has a number of facets, including the development of an Evaluation Kit to assist individual projects in the evaluation of the program at specific sites, assessment of the impact of the program as a whole, examination of individual projects, and preparation of recommendations of models for mentoring indigenous students.
Quality Assurance for the Analytical Chemistry Laboratory

Analytical chemical results touch everyones lives can we eat the food? do I have a disease? did the defendant leave his DNA at the crime scene? should I invest in that gold mine? When a chemist measures something how do we know that the result is appropriate? What is fit for purpose in the context of analytical chemistry? Many manufacturing and service companies have embraced traditional statistical approaches to quality assurance, and these have been adopted by analytical chemistry laboratories. However the right chemical answer is never known, so there is not a direct parallel with the manufacture of ball bearings which can be measured and assessed. The customer of the analytical services relies on the quality assurance and quality control procedures adopted by the laboratory. It is the totality of the QA effort, perhaps first brought together in this text, that gives the customer confidence in the result. QA in the Analytical Chemistry Laboratory takes the reader through all aspects of QA, from the statistical basics and quality control tools to becoming accredited to international standards. The latest understanding of concepts such as measurement uncertainty and metrological traceability are explained for a working chemist or her client. How to design experiments to optimize an analytical process is included, together with the necessary statistics to analyze the results. All numerical manipulation and examples are given as Microsoft Excel spreadsheets that can be implemented on any personal computer. Different kinds of interlaboratory studies are explained, and how a laboratory is judged in proficiency testing schemes is described. Accreditation to ISO 17025 or OECD GLP is nearly obligatory for laboratories of any pretension to quality. Here the reader will find an introduction to the requirements and philosophy of accreditation. Whether completing a degree course in chemistry or working in a busy analytical laboratory, this book is a single source for an introduction into quality assurance.
Pulsation Effects on the Air Fuel Ratio of Carburetor Engines

A significant wavewise change of air fuel ratio in line with the engine speed having a long intake pipe was studied experimentally and theoretically. The results show the pulsewise change in fuel flow plays the dominant role in the wavewise change in the air fuel ratio. It is found that this pulsewise fluctuation of the fuel flow forms an oscillation wave with both the amplitude and frequency becoming larger according to the engine speed resulted by the phase change of the pulsation wave in the intake pipe according to the engine speed. A modified frequency ratio of gas vibration in the intake pipe to that of engine intake stroke is proposed to explain this pulsation effect on the fuel flow and an effective simulator for this phenomena is established.
Firms' contribution to open source software and the dominant skilled user

Free/libre or open-source software (FLOSS) is nowadays produced not only by individual benevolent developers but, in a growing proportion, by firms that hire programmers for their own objectives of development in open source or for contributing to open-source projects in the context of dedicated communities. A recent literature has focused on the question of the business models explaining how and why firms may draw benefits from such involvement and their connected activities. They can be considered as the building blocks of a new modus operandi of an industry, built on an alternative approach to intellectual property management. Its prospects will depend on both the firms' willingness to rally and its ability to compete with the traditional “proprietary” approach. As a matter of fact, firms' involvement in FLOSS, while growing, remains very contrasting, depending on the nature of the products and the characteristics of the markets. The aim of this paper is to emphasize that, beside factors like the importance of software as a core competence of the firm, the role of users on the related markets - and more precisely their level of skills - may provide a major explanation of such diversity. We introduce the concept of the dominant skilled user and we set up a theoretical model to better understand how it may condition the nature and outcome of the competition between a FLOSS firm and a proprietary firm. We discuss these results in the light of empirical stylized facts drawn from the recent trends in the software industry
Oxidative decolorization of a malachite green oxalate dye through the Photochemical Advanced Oxidation Processes

This report was aimed at an investigation of efficiency for Photochemical Advanced Oxidation Processes (UV photolysis, UV/H2O2, UV/TiO2, UV/H2O2/TiO2 and UV/H2O2/Fe2+ processes) to decolorize Malachite Green Oxalate (MGO) dye. Experimental runs were performed using laboratory scale photochemical reactor. About 98% decolorization was obtained with initial 100 ppm MGO dye in Photo-Fenton process under optimal conditions (60 ppm Fe2+ concentration, 12 mM of oxidant concentration, at pH 3.0 for 60 min). 97% decolorization was obtained using UV/H2O2/TiO2 process having [TiO2]o of 0.6 gm/L for similar reaction conditions. The percentage decolorization of MGO was in range of 94-95% for both UV/TiO2 and UV/H2O2 processes. Concentration of ferrous salt (60 ppm) was considered as an optimal value to carry out the UV/H2O2/Fe2+ process for MGO decolorization. Influence of oxidant (H2O2) and Fe2+ ions for oxidation of MGO was studied in Photo-Fenton process. Sulphate radical based AOPs was proved to be more effective in treating MGO dye with irradiation. Results indicate that decolorization efficiency by Photochemical AOPs for MGO dye in photochemical reactor were more efficient. Pseudo-first-order model of kinetics was noticed to be the best model fit to explain the decolorization of MGO dye solution.
Generic learning materials: developing academic integrity in your students

Academic integrity (AI) is of relevance across all academic disciplines, both from the perspective of the educator and the student. From the former perspective there is the need to increase the awareness of AI amongst the student population whilst monitoring and enforcing the rules and regulation regarding plagiarism within their institution. On the other hand, students need a full appreciation of the importance of AI and a clear recognition of the penalties for flouting the regulations in order to steer a successful passage through higher education and on into their professional career. By repurposing learning materials originally developed by the Pennsylvania State University (USA), the Universities of Southampton and Leeds (UK) have developed academic integrity guidelines to support students in their studies and provide an assessment of their understanding of AI concepts. This chapter describes the development of these learning activities and examines the technical and content issues of repurposing materials for three different institutions. It also reflects on the success of embedding the guidelines and assessment in geography programmes at two UK universities, examines the effect of using the online plagiarism detection service, Turnitin, to police plagiarism cases and summaries the lessons learnt in helping geography students to enhance their study skills.
PENGARUH CITRA MEREK, KUALITAS PRODUK TERHADAP KEPERCAYAAN SERTA KEPUTUSAN PEMBELIAN (Survei pada Pembeli Sepeda Motor Honda Vario pada PT Sumber Purnama Sakti di Kabupaten Gresik)

The objectives of research are the influence of variable Brand Image on variable Trust; the variable influence of Product Quality on variable Trust; the variable influence of variable Trust on variable Purchase Decision; the influence of variable Brand Image on variable Purchase Decision; and the influence of variable Product Quality on variable Purchase Decision. Type of research is explanatory research with quantitative approach. The sample is 118 respondents who buy Vario Honda motorcycle at PT. Sumber Purnama Sakti of Gresik Branch. Sampling technique is simple convenience sampling. Data collection method is questionnaire. Data analysis is path analysis and descriptive analysis. Based on result of research, it may be suggested that PT Astra Honda Motor as the producer of Honda motorcycle, including Vario Honda motorcycle, shall maintain brand image of company. Keywords: Brand Image, Product Quality, Trust, Purchase Decision Abstrak Penelitian ini bertujuan untuk mengetahui: pengaruh variabel Citra Merek terhadap variabel Kepercayaan; pengaruh variabel Kualitas Produk terhadap variabel Kepercayaan; pengaruh variabel Kepercayaan terhadap variabel Keputusan Pembelian; pengaruh variabel Citra Merek terhadap variabel Keputusan Pembelian; pengaruh variabel Kualitas Produk terhadap variabel Keputusan Pembelian. Jenis penelitian yang digunakan adalah penelitian penjelasan ( explanatory research ) dengan pendekatan kuantitatif. Sampel sebanyak 118 orang responden yang membeli sepeda motor Honda Vario di PT Sumber Purnama Sakti Cabang Gresik. Teknik pengambilan sampel menggunakan teknik simpel convenience sampling . Metode pengumpulan data yang digunakan dalam penelitian ini adalah menyebar kuesioner. Analisis data yang digunakan yaitu analisis jalur ( path analysis ) dan analisis deskriptif. Berdasarkan hasil penelitian ini maka disarankan agar pihak PT Astra Honda Motor sebagai produsen sepeda motor Honda khususnya sepeda motor Honda Vario sebaiknya mempertahankan citra merek perusahaan Kata Kunci : Citra Merek, Kualitas Produk, Kepercayaan, Keputusan Pembelian
The use of multiple choice tests for formative and summative assessment

This paper describes the use of multiple-choice tests as an essential part of the assessment for a third-year undergraduate course in computer science. Multiple-choice tests are yesterday's news - they have been used for student assessment for many years - but their implementation as presented here differs from the norm in several important respects, in particular their use for formative (as opposed to purely summative) reasons. This paper describes the intent of the tests, their format, and the regulations concerning them, discusses the advantages and disadvantages, and concludes that there are significant gains to be made for both educators and students from their appropriate deployment.
Building Classroom Discipline

The leading text in the field, this book analyzes the contributions of the leading authorities in discipline, to show how their theories and systems can be used by teachers to create structures of positive discipline. This text analyzes 18 models of school discipline developed by educational thinkers of the last half century and shows how they can be applied in realistic situations. A unique contribution of the text is that the theorists listed also coordinate with Professor Charles to ensure accuracy in the presentation of their models. Teachers are motivated to create a structure of positive discipline based on traditional and current disciplinary approaches. The models of discipline presented in this book include six historical approaches that can be studied for perspective and development. Beyond the historical models, eleven current "application" models reflecting current thought are included with chapter ending cases for each model. The same four cases are repeated to compare outcomes using the suggestions of different models. The final portion of the book presents a guide that helps users build their personal systems of discipline. Readers are guided though the process of designing systems of discipline suited to their particular needs. The book is user friendly and contains many pedagogical features.