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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
71

The development of a framework for sustainable housing delivery in Lagos, Nigeria

Olagunju, Olatunji A. January 2014 (has links)
There is an estimated 16 million housing units shortfall in Nigeria and the government cannot meet the housing needs of Nigerians because of budgetary constraints and other competing needs. It is important to note that the leaders have failed on numerous occasions to tackle the key challenges associated with a lack of infrastructure development. The emphasis has been placed on the individual homeowners fulfilling all their own requirements. The aim of this research is to develop a framework that will aid sustainable housing delivery in Lagos one of the most challenged areas of Nigeria. A clearer picture of the housing environment in Lagos was documented based on critical literature reviews, analysis of the reasons why there is a deficiency in housing and its infrastructure delivery. The aim of the researcher was following the identification of the challenges to draw up a framework that would assist the relevant stakeholders namely the householders, developers and government in overcoming these and delivering further sustainable housing. The research was completed using a mixed method including qualitative and quantitative means of acquiring necessary information in the form of a detailed literature review followed by a questionnaire survey of 500 household respondents. A total of 496 sets of data were collected through the questionnaire survey and analysed using SPSS, Excel and selected statistical methods. Validation of the framework was done using focus group discussions with stakeholders. Interviews with key housing and government personnel were also held including an analysis of 5 case studies. The key findings are that 1) the market economy approach along with flexible, efficient economic instruments are key factors in enabling the construction industry to positively respond to sustainable development in terms of resource efficiencies and environmental protection in a developing economy like Nigeria. 2) The social and political barriers cannot be overcome without a meeting of wills amongst the stakeholders. 3) There needs to be transparency and the desire to achieve the objective so the monitors will be effective to counteract dissatisfied individuals that will come out of the bureaucratic woodwork. 4) There needs to be an urban redesign driven by stakeholders keen to see government policy align with sustainable housing objectives. Key recommendations from this research are that: 1) The government should partner with the private sector to provide enough homes for Nigerians. 2) The government should henceforth concentrate in outlining good policy framework for the sector providing much needed infrastructural and financial support that will encourage sustainability and systematic development of housing in the country. The framework developed in this research is envisaged to be contributory in road mapping the way and identifying key attributes and strategy for delivering sustainable housing in Lagos, Nigeria.
72

Storgatan 2.0 : A Concept to discuss redesign ideas for the main pedestrian street of Växjö

Vuori, Sanni January 2017 (has links)
Storgatan 2.0 is a study and design concept investigating the need for change of the main pedestrian street of the city of Växjö, in South Sweden. In order to propose a basis for discussions, and work as an inspiration for further renewal ideas, the design concept presents various, initial redesign visualisations of the site, Storgatan pedestrian street. The theoretical framework of this study leans on conducting urban studies with human-centred approach to city development. The exploratory research phase of the project was performed through several methods, including site observation, interview, and a survey for the local citizens. Also, relevant secondary research and necessary investigation of the context, Sweden, are part of the study. In the end, the project focuses on sorting and analysing the data, by using various visual thinking tools as a method. The outcome of the project is a proposal visualising the possibilities for Storgatan, based on the research results. The visualisations are not meant to provide detail-oriented final solutions, but defend the potential of Storgatan to become a stronger version of the main pedestrian street – an enjoyable, pedestrian-prioritised public place that is actively used and shaped by the citizens.
73

Redesign for Carbon Fiber : A feasibility study on composites in forestry harvesting heads

Karlsson, Simon, Marklund, Isabella January 2021 (has links)
Harvesting heads are an essential part of today’s forestry industry, enabling a high rate of tree felling from a single operator. Requirements for the forestry machine they are attached to are strongly linked to the weight of the harvesting head, providing an incentive to make the heads as light as possible. This can be done in various ways, of which one is switching the material to one that is lighter.This thesis examined the feasibility of producing the frame of a harvesting head in carbon fiber reinforced polymer. This was done through a redesign approach in several phases. The design and requirements of the existing harvesting head were detailed, the strengths and weaknesses of the material were studied, and topology optimization was utilized as a tool for better understanding the load paths and possible material placement. Concepts aimed at enabling production and use of the new frame while keeping features necessary for component attachment and function was then generated.The results showed a frame made largely from carbon fiber reinforced polymer, but with elements of steel, and with a total weight reduction of 45% compared to the original design. The conclusions of the thesis, within the established delimitations, is that a frame from this material is possible but complex to produce.
74

Rekonstrukce pohonu vysokotlakého vstřikovacího čerpadla s převodovým poměrem 1,5 / Redesign of High Pressure Injection Pump Drive with Gear Ratio 1,5

Šulc, David January 2013 (has links)
The master´s thesis focuses on the redesign of highpressure injection pump drive with gear ratio 0,5 to gear ratio 1,5. The injection pump will be used for diesel engine with four cylinders. The final solution was created by classic procedure. For the redesign were used softwares Autocad Inventor 2012 and ANSYS 14.
75

A Middle School's Journey from Improvement Required towards Professional Learning Communities

January 2019 (has links)
abstract: The focus of this research study was to better understand the development of a Professional Learning Community (PLC) culture within an urban middle school campus and to analyze if the intervention, intended to develop a campus PLC culture, had any positive or negative impact on student achievement. This mixed-methods research study utilized pre and post surveys and interviews with campus educators to delve into the perceptions of the development of a PLC culture within the middle school campus. Furthermore, student academic performance was explored through the analysis of state academic performance reports. The first significant finding of this study was that the results of the concurrent method of data analysis affirmed that, potentially because of this intervention during the 2018-2019 academic school year, the middle school of this study did commence the development of a professional learning community culture. The second significant finding was that based on the data analyzed of student performance for the three previous academic years, student achievement did increase academically when accounting all students and all contents. Furthermore, both math and English language arts had the lowest percentage of students not meeting grade level standards since 2016. Finally, the largest subpopulation within the school campus, English Learner students, demonstrated large gains at 23 percentage points over the last three years in the academic performance tier of approaching grade level or above. This increase in academic performance by the students did ultimately lead to the campus performance rating to increase positively, as measured by the state of Texas. / Dissertation/Thesis / Doctoral Dissertation Leadership and Innovation 2019
76

The Grand Tour

Hamrin, Kristoffer January 2021 (has links)
In my final architectural thesis I decided to travel through Italy for three months on a so called Grand tour to explore the rich history, culture & architecture. The Grand tour is also about finding my final thesis project by meeting and understanding certain  problems and issues that I encounter during the trip by speaking to locals.  The people we meet throughout the Grand Tour  decided every destination we go to next by signing our map. Where?San Sicario Bobsled CourseTurin, Winter Olympics 2006 The remains of the huge infrastructures and facilities that was built for the winter Olympics in Turin 2006 are left completely abandoned and are sitting as huge scare in the landscapes in the small village San sicario. The remaining structures are left completely without future plans and stand rotting. The Italian government deeming it is even too expensive to demolish. I am going to work to trying to redesign the olympic bobsled park that is located near San sicario. Is it possible to rethink and give the structures a new purpose? I redesigned and integrated a system of geodesic domes with a botanic garden and controlled climateall year around to facilitate a new work environment and living domes, a space where you could travel toand work digitally from.Since that alternative now is available and will remain after the pandemic is over. But also repurposingthe existing structures since they stand empty and still in fair condition.
77

Contribution au développement d’une méthode analytique pour l’identification des dépendances et la propagation des changements d’ingénierie en re-conception de produits / Contribution to the development of an analytical method for dependencies identification and engineering changes propagation for product re-design

Masmoudi, Mahmoud 12 May 2017 (has links)
La gestion des changements d’ingénierie, appelée aussi ingénierie du changement, est un domaine de recherche qui s’intéresse à l’étude des changements et des modifications apportés par les concepteurs industriels sur un produit durant l’une des phases de son cycle de vie. Ces changements peuvent exister dans le cadre de renouvellement d’un produit dans un but d’amélioration ou de reconception. Dans la littérature, plusieurs méthodes et outils ont été mis en place pour évaluer l’impact d’un changement en utilisant les dépendances existantes entre les éléments d’un produit, prédire de façon efficace la propagation du changement et évaluer ensuite ses conséquences possibles. Mais aucun d’entre eux n’a tenté de caractériser la relation de dépendance sous la forme d’une fonction polynomiale, en plus des caractérisations classiques par valeurs qualitatives et quantitatives. Nous proposons donc, une nouvelle méthode pour générer les variations possibles d’un changement, afin de modéliser ces variations par paire sous formule analytique, d’étendre les variations par paire aux variations de plusieurs variables et de vérifier formellement la cohérence des résultats obtenus. Visuellement, un graphe de dépendance est construit oú les noeuds représentent les éléments de produit et les arcs portent les fonctions qui les relient. Nos résultats montrent que cette caractérisation fonctionnelle de la dépendance est instructive et permet une propagation de changement et une évaluation efficace. Un modèle géométrique 2D d’un vélo est utilisé pour illustrer l’approche proposée. / Engineering Change Management, also known as Change Engineering, is the research domain that focuses on the study of changes and modifications brought by industrial designers on a product during one of the phases of its life cycle. These changes can exist in the case of product renewal for improvement or re-design. In the literature, several methods and tools have proposed to assess the change impact using the existing dependencies between the product components, predict effectively the change propagation and then evaluate its possible consequences. However, none of them attempted to characterize the dependency relationship in the form of a polynomial function in addition to the qualitative and quantitative values. Therefore, we propose, a new method to generate change variations, in order to model these variations in pairs with an analytical formula, expand the variations in pairs to changes in several variables and formally check the consistency of the results obtained. Visually, a dependency graph is constructed where nodes represent the components of product and edges are the functions that connect them. Our results show that this functional characterization of dependency allows an effective assessment of change propagation. A bike with 2-D geometric model is used to illustrate the proposed approach.
78

Structural Analysis and Redesign of a L90 Front Axle Casing

Berra Widén, Erik January 2023 (has links)
This thesis was commissioned by Volvo Construction Equipment (Volvo CE) to redesign the front axle casing of their L90 wheel loader to be more in line with their larger wheel loaders. The current L90 front axle casing consists of two parts bolted together in the middle. However, the current assembly process is cumbersome, and as such, Volvo CE wants to determine if a one-piece front axle casing can be implemented into their L90 wheel loaders. Volvo CE’s larger wheel loaders such as the L120 currently have a one-piece design for the front axle casing and can serve as template. This thesis aimed to determine if it was possible to create a one-piece axle casing for the L90 and provide an example of how it would look like. Additionally, the suggested design would need to meet all of Volvo CE’s performance requirements and be on par with the current L90 front axle casing.  The methodology used to develop the redesigned axle casing consisted of performing different finite element analyses (FEA) in Ansys Mechanical to evaluate the casing’s performance. The analysis was preformed using Volvo CE’s guideline and performance criteria in order to determine what areas in the redesigned axle required further adjustment. Additionally, the redesigned casing would be compared against the current L90 casing. This would determine if the redesigned axle could be realistically implemented into a L90 wheel loader.  Applying this methodology led to three different iterations of the axle casing design. Each design iteration following the first one led to improvements in the casing’s mechanical performance. The third and final iteration was able to meet all of Volvo CE’s static and fatigue requirements. The stresses for the redesigned axle casing are, on average, 13% lower than that of the current axle casing at key points around the casing’s ribs. However, the tolerances required to manufacture the redesigned axle casing where slightly higher than the current L90 casing. Nevertheless, the tolerances required to manufacture redesigned axle can be realistically met by a foundry. This thesis was able to provide a plausible redesign that can be implemented in Volvo CE’s current line of L90 wheel loaders.
79

Evaluation and Redesign of a Web Interface using Usability Heuristic Principles

Namburu, Sri Harsha, Teeparthi, Venkata Vamsi Krishna January 2023 (has links)
The main aim of this thesis project is to select and redesign a website which was originally designed without using the HCI design principles. The website “Atari best electronics” (https://www.best-electronics-ca.com/) was chosen and evaluated using usability heuristics. After finding the flaws in the website, it is redesigned using the HCI design principles using Google sites. The redesigned website is then surveyed using the System Usability Scale (SUS). The results of the survey are presented in the report. Background: The UI/UX of any website increases drastically if the website is designed with the HCI principles in mind. Most of the websites do not follow the design principles. This affects the reach and usage of the website. The users using these websites are very quick to quit. The websites can be designed/redesigned using the HCI designed principles and increase the user experience.  Objectives: The objective of this project is to evaluate the chosen website and redesign it by using HCI design principles and conduct survey to understand the user’s perspective on the redesigned website. Methods: This project uses two methods in order to get results and solution of the proposed research questions. The heuristic evaluation method helps us find the flaws in the website and lets us redesign the website using HCI design principles. The survey evaluation method helps us understand the user’s perspective on the redesigned website. Results: The website is redesigned using the HCI design principles and a survey questionnaire is shared, and the responses are collected, and the results are represented in the form of bar graphs. Based on the results of the survey, we find out whether or not the users liked using the redesigned website. Conclusion: Using HCI principles in designing/redesigning a website increases the usability of the website. After analyzing the survey, we understand that the user experience is greatly affected when a website is designed using HCI design principles.
80

Geometric Complexity based Process Selection and Redesign for Hybrid Additive Manufacturing

Joshi, Anay January 2017 (has links)
No description available.

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