Dans un marché mondial, de nombreuses sociétés sont passées d’une stratégie d’entreprise centralisée où les produits sont conçus dans un lieu central et fabriqués dans les centres régionaux à une entreprise décentralisée, puis à une organisation répartie sur les régions. Le contexte Industriel de la thèse est GE Renewable Energy – Hydro solutions qui conçoit et fabrique des centrales d’énergie hydraulique. L’organisation GE hydro est dispersée sur 5 régions (Amérique du Nord, Amérique Latine, Europe, Chine et Inde). Chaque région est devenue une partie de cette organisation distribuée où sont conçues et fabriquées des turbines hydrauliques / générateurs. Cependant, de nouveaux défis ont surgis dans ce processus de développement de produits distribués : les besoins spécifiques à un marché, les différentes pratiques de travail, des différentes méthodes de conception, en plus des différences culturelles entre les régions.Afin de rationaliser ces différences, le développement de produits distribués comportait plusieurs objectifs. Par exemple, la standardisation des processus d'ingénierie, le développement des guides de conception commune pour les outils d'ingénierie, l'harmonisation des procédures de qualité et de résolution des problèmes. L’organisation Hydro a confié ces objectifs aux collectifs d'ingénierie virtuels qui sont dispersés dans toutes les régions.Notre recherche vise à étudier et à soutenir les collectifs d'ingénierie virtuels dans la co-création des standards techniques propres à l'entreprise. Les collectifs d'ingénierie virtuels impliquent des concepteurs, des ingénieurs industriels, des techniciens ainsi que les utilisateurs finaux. Ils devaient collaborer à distance afin de co-développer les standards techniques et plus tard de les adopter dans les projets des clients.Les collectifs d'ingénierie virtuels ont été au cœur de notre démarche de standardisation, la thèse a abordé les questions de recherche suivantes :1."Quel processus et plateforme collaboratifs de standardisation pourront permettre aux collectifs d'ingénierie de co-développer leurs standards à distance ?"2."Quelles sont les caractéristiques des différents types de collectifs virtuels qui conviennent respectivement au processus collaboratif de standardisation ?"3."Quel processus opérationnel doit être défini pour faciliter le travail des collectifs d'ingénierie virtuels dans une organisation gérée par projets ?"De la littérature, nous avons défini et différencié les types des collectifs d'ingénierie virtuels en tant que communautés de pratiques ou d'intérêt virtuelles, des équipes virtuelles et des réseaux d'apprentissage. Grâce à des observations et des réflexions autour de la pratique, nous avons développé et testé nos propositions. Les contributions principales de la thèse sont résumées telles que :1.Un modèle de processus collaboratif de standardisation pour co-développer les standards techniques à distance.2.HySPeC - une plateforme collaboratif de standardisation - pour répondre aux différentes exigences du processus collaboratif de standardisation.3.Un modèle dynamique pour caractériser les collectifs virtuels en fonction de leurs phases de développement.4.Un cadre des collectifs virtuels pour sélectionner, différencier et adapter les collectifs virtuels en fonction des objectifs du projet.5.Un processus opérationnel des collectifs virtuels pour faciliter l'adoption et la mise en œuvre des standards d'ingénierie dans les projets.La direction chez GE Hydro a considéré les propositions comme un facteur de succès pour co-développer les standards d'ingénierie à distance. Les différents types des collectifs virtuels peuvent s’adapter au processus de standardisation collaboratif et utiliser intuitivement les fonctionnalités de la plateforme collaborative. L'approche a également fourni un processus opérationnel pour faciliter l'intégration et le travail des collectifs d'ingénierie virtuels au sein de l'organisation hydro. / In a global economy, the conquest of exploring and acquiring new markets has led many companies to expand their business around the globe. Many companies adopted a strategy of shifting from a centralized company where products were designed and manufactured in one region to a decentralized company, and then to a distributed organization over the regions. Our thesis context is GE Renewable Energy – Hydro solutions that designs and manufactures hydraulic power plants. GE hydro organization is scattered over 5 regions (North America, Latin America, Europe, China and India). Each region became part of this distributed organization where they participated in the designing and the manufacturing of the hydraulic turbines/ generators. However, new challenges arose in this distributed product development process: specific market needs, different working practices, various design methods, multitude of design tools in addition to the cultural differences among the regions.In order to rationalize the regional differences, the distributed development of hydraulic turbines and generators entailed several objectives. For example, standardization of engineering processes, development of common design guides for engineering tools, harmonization of quality sheets and troubleshooting procedures. Hydro organization has entrusted these objectives to the virtual engineering collectives who are dispersed in all the regions.Our research aimed at studying and supporting the virtual engineering collectives in the co-creation of corporate engineering standards and guidelines. The virtual engineering collectives involved the designers, industrial engineers, technicians as well as the end-users. They had to remotely collaborate in order to co-develop the engineering standards and later on to adopt them in customer projects.Since the virtual engineering collectives were at the core of our standardization approach, the thesis addressed the following research questions:1- “which collaborative standardization process and platform could enable the engineering collectives to co-develop their standards at distance?”2- “what are the characteristics of the different virtual collectives’ types which suit respectively the collaborative standardization process?”3- “which operational process has to be defined to ease the work of the virtual engineering collectives within a project based management style?”From the literature, we defined and differentiated the virtual engineering collectives’ types as virtual communities of practice and/or interest, virtual teams and networks of learning. Through observations and reflections from the practice, we have developed and tested our propositions. The main thesis’ contributions are summarized as follows:1- The collaborative standardization process to co-develop the engineering standards at distance.2- HySPeC templates – the collaborative standardization platform - to respond to the different requirements of the collaborative standardization process.3- The virtual collectives’ dynamics (VCD) model to characterize the virtual collectives in function of their development phases.4- The virtual collectives’ framework (VCF) to select, differentiate and fit the virtual collectives in function of the project’s objectives.5- The virtual collectives’ operational process to facilitate the adoption and the implementation of the engineering standards in the customers’ projects.The top management at GE Hydro found the proposed collaborative standardization approach able to co-develop the engineering standards at distance. The different virtual collectives’ types can fit and adapt to the collaborative standardization process and intuitively use the collaborative platform’ functionalities. The approach also provided an operational process to facilitate the integration and the work of the virtual engineering collectives within the distributed hydro organization.

<p>Engineering students are expected to develop professional skills in addition to their technical knowledge as outcomes of accredited engineering programs. Among the most critical professional skills is the ability to work effectively in a team. Working effectively in teams has learning benefits and also provides an environment for developing other professional skills such as communication, leadership skills, and time management. However, students will develop those skills only if their teams function effectively.</p> <p>This dissertation includes three studies that together inform team formation and management practices to improve team dynamics. The first study investigates mixed-gender team dynamics to determine whether those teams are realizing their potential. The second study explores the relationship of individual psychological safety and students’ team member effectiveness and the moderating effects of team-level psychological safety. The third study explores self-rating bias among first-year engineering students and its relationship to student characteristics and dimensions of team-member effectiveness. </p> <p>Although mixed-gender teams had equal team dynamics with all-male teams, more team facilitation and training are needed to improve the experience of mixed-gender teams. Asian, Black, and Hispanic/Latino students, as well as students with lower GPA, report lower psychological safety, which is associated with lower team-member effectiveness. Team-level psychological safety moderated this effect for Asian and Hispanic/Latino students. Students’ effort in teams was associated with lower self-rating bias, likely an indication of greater self-awareness. Together, these studies and their findings contribute to a broader understanding that there are interrelationships among team composition, team dynamics, and team-member effectiveness, and that these relationships differ based on student characteristics such as race/ethnicity, gender, and prior knowledge. This work adds to the body of research demonstrating the importance of teaching students about effective teamwork, conducting regular peer evaluations of team functioning, and interpreting those peer evaluations carefully to avoid perpetuating any biases. This work also demonstrates the usefulness of psychological safety as an important indicator of marginalization.</p>

The desire to produce a learning environment which promotes student motivation, collaboration, and higher order thinking is common within the higher education system of today. Such learning environments also have the ability to address challenges’ Mechanical Engineering Technology (MET) students face entering the workforce. Through the vertical and horizontal integration of courses, this research presents how a scaffolded learning environment with a centralized theme of energy can increase motivation and conceptual retention within students. The integration of courses allows students to systematically translate their competency of concepts between energy based courses through experiential learning. The goal of this work is to develop a competency based learning model where students earn a professionally recognizable credential. The credential is earned through demonstrating their mastery of industry desired skills at a level that goes above and beyond the stock curriculum. The result is a more continuous curriculum that enhances multi-disciplinary problem solving while better preparing MET students for the workforce.

Quality drives customer satisfaction, improved business performance, and safer products. Reducing waste and variation is critical to the financial success of organizations. Today, it is common to see Lean and Six Sigma used as the two main strategies in improving Quality. As advancements in information technologies enable the use of big data, defect reduction and continuous improvement philosophies will benefit and even prosper. Predictive Quality Analytics (PQA) is a framework where risk assessment and Machine Learning technology can help detect anomalies in the entire ecosystem, and not just in the manufacturing facility. PQA serves as an early warning system that directs resources to where help and mitigation actions are most needed. In a world where limited resources are the norm, focused actions on the significant few defect drivers can be the difference between success and failure

<div> <p> Aircraft engines require lightweight efficient thermal management devices to improve engine performance at high pressure ratios. Acoustic streaming can provide a viable, lightweight solution to improve the heat exchanger capacity with a reduced drag penalty within engine heat exchangers. This project develops a test section that will experimentally characterize the effect of acoustic streaming on the unsteady heat flux and shear stress within a narrow channel. This is accomplished by careful selection of measurement techniques to monitor the steady and unsteady properties of the flow and iteratively designing the test section with CFD support to converge to an optimal test model. Using CFD support to revise each iteration reduces the experimental cost of developing an effective geometry. </p> <p> Pressure taps and K-type thermocouples are used to monitor the total inlet pressure and temperature as well as the wall surface pressure and temperature. Optical shear stress sensors are selected to monitor the unsteady wall shear stress. A thin film sensor array is designed for high frequency wall temperature measurements which serve the boundary condition for a 1-D heat flux analysis to determine the unsteady heat flux through the wall. The test model consists of two hollow Teflon airfoils that create a narrow channel within a larger flow area. The airfoils create three flow paths within the wind tunnel test section and the area ratio between the measured flow and the bypass flow controls the Mach number of within the measured flow channel. The acoustic waves drive acoustic streaming and are generated by a Rossiter Cavity with L/D =2 which produces pressure oscillations with dominant frequency of 8 kHz in a Mach 0.8 flow. </p> <p> The test geometry successfully achieves <a>Mach 0.8 flow and the 8 kHz signal </a><a href="https://purdue0-my.sharepoint.com/personal/mbutzen_purdue_edu/Documents/MS Thesis/Thesis Living Document.docx#_msocom_1">[BMJW1]</a> from the Rossiter cavity. The successful commissioning sets the stage for future experiments to determine the potential of acoustic streaming as a low weight modification to improve compact heat exchangers. </p> </div> <div><div><div><br> </div> </div> </div>

<p>This research proposes a model for equitable and accessible competency-based regulatory sciences education in sub-Saharan Africa. Access to safe, quality, and effective medical products in sub-Saharan Africa is contingent on strong National Medicines Regulatory Authorities (NMRA) and a strong, highly skilled workforce of regulatory scientists. The literature acknowledges that sub-Saharan Africa has a critical skilled workforce gap in regulatory scientists and an immediate need to develop strategies for sustained human capacity development in regulatory sciences. This need is significantly heightened because of rapidly evolving advances in health and medical product technologies. And as the continent moves towards regulatory harmonization and the deployment of the African Medicines Agency, the continent needs to have a skilled and portable workforce. First, using the framework synthesis type of systematic review of the literature and the survey of experts in regulatory sciences, the research developed a comprehensive competency framework (CF) to serve as the bedrock for developing a competency-based curriculum and training. Next, an online, fully asynchronous proof-of-concept (POC) competency-based regulatory sciences education (CBRSE) module was designed and deployed based on the learning sciences theories. The purposive sampling technique recruited seventeen (n = 17) participants from the Purdue Masters’ Biotechnology Innovation and Regulatory Sciences (BIRS) African cohort to engage in the POC module. The module was evaluated using an end-of-module survey (a modified Student Assessment of Learning Gains (SALG) instrument), indices of students’ engagement, and performance assessments. The CF has eighty-eight (n = 88) competence statements in five clusters, eighty-six (n = 86) of which were ranked as mandatory and two as supplementary competencies. Fourteen (n = 14) students completed the POC module. The triangulation of results from the end-of-module survey, indices of students’ engagement, and performance assessments show that the POC module assisted students in achieving the desired competencies. The research also shows that the dialectics component of the module was not a great enabler of students’ learning. Future researchers, developmental partners, and NMRA could use the competency framework and the CBRSE module’s model to develop education and continuous professional development training in sub-Saharan Africa. </p>

<p>Many industrial organizations invest heavily in modeling and simulation (M&S) to support the design process. The primary business motivation for M&S is as a cheaper and faster alternative for obtaining information towards a better understanding of system behavior or to help with decision making. However, M&S predictions are known to be inexact because models and simulations are mathematical approximations of reality. To ensure that models are applicable for their intended use, organizations must collect evidence that the M&S is credible. Verification, validation, and uncertainty quantification (VVUQ) are the established methods for collecting this evidence. Structured frameworks for building credibility in M&S through VVUQ methods exist in the scientific literature but these frameworks and methods are generally not well developed, nor well implemented in industrial environments. The core motivation of this work is to help make existing VVUQ frameworks more suitable for industry.</p> <p>As part of this objective, this work proposes a new credibility assessment that turns VVUQ results into an intuitive, numerical decision-making metric. This credibility assessment, called the Credibility Index, identifies the important aspects of credibility, extracts the relevant VVUQ results, and converts the results into an overall Credibility Index score (CRED). This CRED score is unique for each specific prediction scenario and serves as an easy-to-digest measure of credibility. The Credibility Index builds upon widely accepted definitions of credibility, well-established VVUQ frameworks, and decision theory.</p> <p>The Credibility Index has been applied to several prediction scenarios for two publicly available benchmark problems and one Rolls-Royce funded subsystem case; all examples relate to the aerodynamic design of turbine-engine compressors. The results from these studies show how the Credibility Index serves as a decision-making metric, supplements traditional M&S outputs, and guides VVUQ efforts. A product feedback study, involving model end-users in industry, compared the Credibility Index to three other established credibility assessments; the study provides evidence that CRED consistently captures all key aspects of information quality when informing end-users on the credibility of model predictions. Due to the industry partnership, this research already has multiple avenues of practical impact, including implementation of the structured VVUQ and credibility framework in an industrial toolkit and workflow. </p>

Upon IRB approval, a corpus of 1,192 texts consisting of three assignments written by a total of 1,736 first year engineering students was compiled, and 117 pedagogical materials were collected. Using an iterative quantitative-qualitative approach to written discourse analysis, instances of formulaic language (4- and 6-word sequences) were identified in the corpus; formulaic language was then coded for the rhetorical functions expected in problem statements as qualitatively identified in the pedagogical materials. Additionally, three discourse-based interviews were conducted with First-year Engineering Faculty. Interview data was coded for themes of effective communication and used to triangulate the findings from the corpus analysis.

<p>Moisture can significantly affect flexible pavement performance. As such, it is crucial to remove moisture as quickly as possible from the pavements, mainly to avoid allowing moisture into the pavement subgrade. In the 1990s the Indiana Department of Transportation (INDOT) adopted an asphalt pavement drainage system consisting of an open-graded asphalt drainage layer connected to edge drains and collector pipes to remove moisture from the pavement system.</p> <p>Over the intervening two decades, asphalt pavement materials and designs have dramatically changed in Indiana, and the effectiveness of the pavements drainage system may have changed. Additionally, there are challenges involved in producing and placing open-graded asphalt drainage layers. They can potentially increase costs, and they tend to have lower strength than traditional dense-graded asphalt pavement layers. </p> <p>Given the potential difficulties, the overall objective of this research was to evaluate the effectiveness of the INDOT’s current flexible pavement drainage systems given the changes to pavement cross-sections and materials that have occurred since the open-graded drainage layer was adopted. Additionally, the effectiveness of the filter layer and edge drains were examined.</p><p><br>Laboratory experiments were performed to obtain the hydraulic properties of field-produced asphalt mixture specimens meeting INDOT’s current specifications. The results were used in finite element modeling of moisture flow through pavement sections. Modeling was also performed to investigate the rutting performance of the drainage layers under various traffic loads and subgrade moisture conditions in combination with typical Indiana subgrade soils. The modeling results were used to develop a design tool that can assist the pavement designer in more accurately assessing the need for pavement drainage systems in flexible pavements.<br></p>

Following a grounded theory research model, the research uncovered and presented the state of debris recycling to a national association of demolition contractors to measure their willingness and attitudes towards the growing trend in the circular economy and adapting their business models to incorporate it into their own contracts. The first part was finding the deficiencies in the current model based on government reports and through interviews with county-level emergency managers. Second, successful businesses that already use the circular economy design in their operations were used as exemplars to emulate and their opinions and suggestions were discussed. The outputs of the emergency managers and the successful businesses was folded into the third phase of the research with surveys to the membership of the National Demolition Association (NDA) with multiple-choice, scalar questions and open-ended, opinion-heavy questions throughout. The findings were reported back to the head of the partnering organization, the NDA, to focus outreach, training, and policy advocacy concentration for the national organization as a whole, but to related and tangentially-connected industries to their own.