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Rozprawy doktorskie na temat „Infrastructures de connectivité”

Autor: Grafiati
Data publikacji: 28 września 2024
Data aktualizacji: 31 lipca 2025

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1

Girardet, Xavier. "Paysage & [et] infrastructures de transport : modélisation des impacts des infrastructures sur les réseaux écologiques." Phd thesis, Université de Franche-Comté, 2013. http://tel.archives-ouvertes.fr/tel-01069242.

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Le développement d'infrastructures linéaires de transport conduit, à toutes les échelles, à une artificialisation du territoire et au morcellement du milieu naturel. La fragmentation du paysage est un processus spatial qui s'accompagne d'une diminution progressive de la connectivité entre les différents éléments nécessaires au bon déroulement des processus écologiques. Ainsi, le maintien d'un bon niveau de connectivité entre les habitats naturels, s'il est compatible avec les activités humaines, est devenu un enjeu majeur pour la préservation de la biodiversité. En mobilisant des méthodes empr
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Remon, Jonathan. "Connectivité fonctionnelle en paysage fragmenté : apport des données génétiques et démographiques pour étudier l'impact multi-spécifique des infrastructures linéaires de transport." Thesis, Toulouse 3, 2018. http://www.theses.fr/2018TOU30327.

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La mise en place des réseaux de continuités écologiques dans les paysages nécessite l'estimation de la connectivité fonctionnelle, particulièrement lorsque ces paysages sont fragmentés par les Infrastructures Linéaires de Transport (ILT). Dans ce contexte, des suivis génétiques et démographiques ont été réalisé sur quatre espèces terrestres dans un paysage fragmenté par six types d'infrastructures en Dordogne, France. Les résultats ont montré qu'une part importante de la variabilité génétique (38 %) est expliquée par les ILT, qui agissent majoritairement comme des barrières à la dispersion. Ce
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Pelay, Johan. "Garantir la cohérence applicative lors des changements de configuration réseau : étude de cas sur la connectivité dans les Software Defined Infrastructures." Thesis, Rennes 1, 2020. http://www.theses.fr/2020REN1S001.

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Des solutions de vérification efficaces nous semblent indispensables afin d’assurer la continuité des services en place et le déploiement de nouveaux services dans les réseaux 5G. Cette problématique ne se limite pas aux techniques de vérification, nos travaux portent aussi sur la formalisation des besoins d'un service réseau complet. Nous avons travaillé sur un langage de programmation facilitant la vérification dans les contrôleurs SDN. Puis nous avons défini des contrats de comportement réseau afin de clarifier les propriétés à vérifier pour assurer le bon fonctionnement d'un service. Enfin
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Da, Piedade Sano Adéola Camille. "Essays on the competitiveness and export performance of African economies." Electronic Thesis or Diss., Université Clermont Auvergne (2021-...), 2024. http://www.theses.fr/2024UCFA0053.

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Avec une population dépassant les 1,4 milliard d'habitants, faisant ainsi de l'Afrique le deuxième continent le plus peuplé au monde après l'Asie, la contribution de ce continent au commerce mondial demeure modeste. La littérature économique identifie divers facteurs contribuant à la marginalisation des nations africaines dans le commerce mondial, notamment un déficit de compétitivité. S'appuyant sur la littérature existante et reconnaissant l'absence de solution universelle, cette thèse explore, à travers ses trois chapitres, les voies qu'offrent la compétitivité prix et hors prix pour une me
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Bliss-Ketchum, Leslie Lynne. "The Impact of Infrastructure on Habitat Connectivity for Wildlife." PDXScholar, 2019. https://pdxscholar.library.pdx.edu/open_access_etds/4832.

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While roads can present weak to complete barriers to wildlife, depending on the animal and traffic volume, mitigations such as under-crossings and green bridges on highways at least partially increase the permeability of the landscape to some of these species. The few studies evaluating the effectiveness of these structures for at least three years typically focused on a single species. Here, we monitored the crossing structure under Boeckman Road, in Wilsonville Oregon, for wildlife activity across summer seasons for ten years, since construction of the road and subsequent opening to traffic.
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Bormpoudakis, Dimitrios. "Green infrastructure and landscape connectivity in England : a political ecology approach." Thesis, University of Kent, 2016. https://kar.kent.ac.uk/56639/.

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'Conservation is about people, not just animals' argued Prince William in a letter to The Financial Times , written to gather support for ending ivory poaching and trading. This truism is often repeated by conservationists; we are frequently reminded that what we do - as humans - influences nature 'out there'. Nevertheless, conservation science often hesitates to interrogate what we do as organised human societies. Time and again, that leads to somewhat simplifying analyses of humanity's enormous power in shaping the whole Earth System -currently argued to surpass the power of geological force
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Abdullah, Nayeem Mohammad. "Development of distributed generation infrastructure for microgrid connectivity to operational power systems." FIU Digital Commons, 2010. http://digitalcommons.fiu.edu/etd/1099.

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Distributed Generation (DG) from alternate sources and smart grid technologies represent good solutions for the increase in energy demands. Employment of these DG assets requires solutions for the new technical challenges that are accompanied by the integration and interconnection into operational power systems. A DG infrastructure comprised of alternate energy sources in addition to conventional sources, is developed as a test bed. The test bed is operated by synchronizing, wind, photovoltaic, fuel cell, micro generator and energy storage assets, in addition to standard AC generators. Connect
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Mahmoud, Noha Gamal El-Din Abdel Hamid Hassan. "Green infrastructure in a Middle Eastern environment : promoting social-ecological connectivity in Greater Cairo." Thesis, University of Sheffield, 2011. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.554214.

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This thesis explores different meanings and practices of green infrastructure (GI). In particular. it examines the scope for GI in the Greater Cairo Region (GCR) of Egypt. In a number of countries. especially in North America and Europe, the nature of GI is increasingly \\e11 established and there have been some successful attempts at implementation. However practice in Egypt appears to be encountering a number of problems. These are principally associated with the aridity of the country (although it has a long tradition of irrigation from the Nile). weaknesses of planning and implementation p
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Cantone, Carolina. "Modelling sediment connectivity in Swedish catchments and application for flood prediction of roads." Thesis, KTH, Mark- och vattenteknik, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-190612.

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Climate changes are predicted to increase precipitation intensities and occurrence of extreme rainfall events in the near future. Scandinavia has been identified as one of the most sensitive regions in Europe to such changes; therefore, an increase in the risk for flooding, landslides and soil erosion is to be expected also in Sweden. An increase in the occurrence of extreme weather events will impose greater strain on the built environment and major transport infrastructures such as roads and railways. This research aimed to identify the risk of flooding at the road-stream intersections, cruc
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Ahlmer, Anna-Klara. "Integrating remotely sensed hydrologic parameters into an index of sediment connectivity." Thesis, KTH, Hållbar utveckling, miljövetenskap och teknik, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-235791.

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The expected increase in precipitation and temperature in Scandinavia, and especially short-time heavy precipitation, will increase the frequency of flooding. Urban areas are the most vulnerable, and specifically, the road infrastructure. The accumulation of large volumes of water and sediments on road-stream intersections gets severe consequences for the road drainage structures. The need for a tool to identify characteristics that impacts the occurrence of flooding, and to predict future event is thus essential. This study integrates the spatial and temporal soil moisture properties into the
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11

Mudali, Pragasen. "Topology control for wireless mesh networks and its effect on network performance." Thesis, University of Zululand, 2017. http://hdl.handle.net/10530/1565.

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A thesis submitted to the Faculty of Science and Agriculture in fulfilment of the Degree of Doctor of Philosophy in the Department of Computer Science at the University of Zululand, 2017<br>InfrastructureWireless Mesh Networks (I-WMNs) are increasingly used to provide network connectivity and Internet access to previously under-served areas in the developing world. It is common for some of these deployments to be battery-powered due to a lack of electrical infrastructure in the targeted areas. Thus, the energy-efficiency of these networks gains additional importance. Topology Control (TC) has
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Ribaudo, Dalila. "Transportation Infrastructures, Location and Productivity. A micro-geography approach." Doctoral thesis, Urbino, 2021. http://hdl.handle.net/11576/2682958.

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Baker, John Garrett. "Ecological Infrastructure: A Framework for Planning and Design: "Addressing Landscape Connectivity and Wildlife Resources for Interstate Highway Systems"." Thesis, Virginia Tech, 2005. http://hdl.handle.net/10919/32990.

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For the last century, automobiles and the roads they require have been a dominant force shaping the modern American landscape. An unrivaled interstate highway system connects major metropolitan areas and is the basis of our transportation infrastructure. Unfortunately, many roadways were not planned or designed with wildlife in mind. As long linear features in the landscape, interstates can function as landscape barriers and cause significant impacts to adjacent wildlife populations. While an aggressive transportation system is being carried out, researchers have only marginally demonstrat
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14

Vancells, Guérin Xavier. "Buits infraestructurals : estratègies operatives pel projecte de la ciutat contemporània." Doctoral thesis, Universitat Politècnica de Catalunya, 2015. http://hdl.handle.net/10803/328721.

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The aim ofthis thesis is to create an analytical framework to understand the specificity and potential of these areas from a critical view of the current extensive growth model operating on the territory, which is performing strategic areas that can offer instrumental knowledge useful for the project in the contemporary city. As an alternative to the reductionism or the lack of flexibility and excessive spatial determinism that often characterize this type of spaces, thes thesis proposes an alternative vision based on a carfeul reading of the specific elements and its resources (the specificit
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Håkansson, Martin, and Tom Åkerström. "Business Ecosystem for Cellular Connectivity in Manufacturing Factories : - A case study to investigate how infrastructure developing telecom companies can establish a viable buisness ecosystem for cellular connectivity in manufacturing factories." Thesis, KTH, Skolan för industriell teknik och management (ITM), 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-264195.

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Manufacturers have begun to realize that in order to have factories which are adapted to the contemporary conditions required for having state of the art manufacturing, the fixed network cables should be replaced by wireless communication with higher capacity. Cellular connectivity has this ability, but to be able to deliver it to manufacturing factories, they would benefit from establishing a suitable ecosystem design for the technology. The purpose of this research paper is to investigate how infrastructure developing telecom companies can work to establish this business ecosystem for cellul
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Conficconi, Michele. "Analysis of time-sensitive networking technologies for the design of a unified communication infrastructure for Industrial Automation and IoT connectivity." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2018.

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Industrial automation solutions have traditionally been differentiated and separated from one another by different incompatible and non-interoperable standards used for communication between devices. As a result, customers have often found themselves locked into proprietary ecosystems. Vendors have had to develop multiple versions of essentially the same product to support these ecosystems. Over the past few years a new driver has arisen to further bolster this device and system integration push: the Industrial Internet of Things (IIoT), which can be defined as the connection of devices throug
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17

Lawrence, Molly. "Experiential Graphic Design: Generating Urban Renewal by Improving Safety and Connectivity in Bicycle Pathways." Kent State University / OhioLINK, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=kent1460734967.

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Munim, Ziaul Haque, and Hans-Joachim Schramm. "The impacts of port infrastructure and logistics performance on economic growth: the mediating role of seaborne trade." SpringerOpen, 2018. http://dx.doi.org/10.1186/s41072-018-0027-0.

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Considering 91 countries with seaports, this study conducted an empirical inquiry into the broader economic contribution of seaborne trade, from a port infrastructure quality and logistics performance perspective. Investment in quality improvement of port infrastructure and its contribution to economy are often questioned by politicians, investors and general public. A structural equation model (SEM) is used to provide empirical evidence of significant economic impacts of port infrastructure quality and logistics performance. Furthermore, analysis of a multi-group SEM is performed by dividing
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Suárez, Pradilla Mónica Marcela. "Efectos de la construcción de la autovía orbital B-40 en la estructura urbana policéntrica de la Región Metropolitana de Barcelona (RMB)." Doctoral thesis, Universitat Politècnica de Catalunya, 2016. http://hdl.handle.net/10803/403881.

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The aim of this research is to analyze the impact of the orbital motorway B-40 or fourth belt Barcelona in the polycentric urban structure of the Barcelona Metropolitan Region or (BMR). The changes discussed in this research are the result of distance variation between the different urban centers of the MRB and the transformation of mobility patterns. Infrastructure B-40 was initially called by roads planners as Fourth Ring Road Barcelona, later in the territorial it changed to a typology of orbital motorway and designated B-40. The name of B-40 Motorway corresponds to its ability to bind dif
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Bishop, O. J. "A multi-scale exploration into the spatial patterns of a three dimensional Urban Tree Infrastructure (UTI) : integrating landscape connectivity, network resilience, and social deprivation." Thesis, University of Salford, 2015. http://usir.salford.ac.uk/36119/.

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A functionally connected urban tree infrastructure (UTI) contributes to ecosystem function, resilience, and the provision of Ecosystem Services (ES). Variation in tree height is an important attribute influencing movement of passerines, habitat quality and landscape patterns. UTI provided ES are particularly beneficial in the most deprived areas of a city. Presented in this thesis is an exploration into the social-ecological shape of a UTI using a holistic, multi-scale and dimensional, landscape approach. The potential landscape connectivity of a UTI in the City of Salford, UK was quantified a
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Brandon, Jana, and Maria Lehtinen. "No Man is an Island : A Case Study of the Oresund Region from a Hub Perspective." Thesis, Linköpings universitet, Företagsekonomi, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-62257.

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Background: The world of today is immensely interconnected. Over the past decades, national economies have been de-bordered and the promoting of the flows of goods, people, capital and services across the borders is evident, as opposed to when flows only moved within national economies. Former vertical structures of old nations have been replaced by a horizontal flow structure in a complex and intertwined global economy. Attracting flows is essential for the growth and survival of cities. Hubs functions as important connection points for these flows and are therefore highly important. Research
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Zhu, Xiaoyang. "Building a secure infrastructure for IoT systems in distributed environments." Thesis, Lyon, 2019. http://www.theses.fr/2019LYSEI038/document.

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Le principe de l'Internet des objets (IdO) est d'interconnecter non seulement les capteurs, les appareils mobiles et les ordinateurs, mais aussi les particuliers, les maisons, les bâtiments intelligents et les villes, ainsi que les réseaux électriques, les automobiles et les avions, pour n'en citer que quelques-uns. Toutefois, la réalisation de la connectivité étendue de l'IdO tout en assurant la sécurité et la confidentialité des utilisateurs reste un défi. Les systèmes IdO présentent de nombreuses caractéristiques non conventionnelles, telles que l'évolutivité, l'hétérogénéité, la mobilité e
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Van, Der Werf Steven Martijn. "Architecture and performance of multi-hop wireless ad-hoc routing protocol (MultiWARP)." Thesis, Curtin University, 2010. http://hdl.handle.net/20.500.11937/1989.

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In recent years, a great deal of attention has been given to wireless connectivity solutions that are capable of establishing wireless ad-hoc networks between mobile nodes. Whilst most of these networks are formed using a combination of fixed and mobile infrastructure, completely infrastructure-less networks are thought to become more commonplace in the future. Moreover, this type of network structure seeks to utilise multi-hop connectivity between mobile nodes rather than the traditional single-hop connectivity established between fixed access points.The initial configuration phase and subseq
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Spendlove, George Bradley. "Security Analysis and Recommendations for CONIKS as a PKI Solution for Mobile Apps." BYU ScholarsArchive, 2018. https://scholarsarchive.byu.edu/etd/8829.

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Secure mobile apps, including end-to-end encrypted messaging apps such as Whats-App and Signal, are increasingly popular today. These apps require trust in a centralized key directory to automatically exchange the public keys used to secure user communication. This trust may be abused by malicious, subpoenaed, or compromised directories. A public key infrastructure (PKI) solution that requires less trust would increase the security of these commonly used apps.CONIKS is a recent PKI proposal that features transparent key directories which publish auditable digests of the public keys they presen
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Crombette, Pauline. "Contribution des technologies satellitaires Pléiades à l'étude des trames vertes urbaines : entre maintien des connectivités écologiques potentielles et densification des espaces urbains." Thesis, Toulouse 2, 2016. http://www.theses.fr/2016TOU20032/document.

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En milieu urbain, la concurrence entre les enjeux de préservation de la biodiversité et de la densification du territoire est particulièrement développée. Dans une optique d’aide à la décision, une meilleure connaissance des zones les plus conflictuelles est requise. Face au constat d’insuffisance et d’inadéquation des données et des méthodes nécessaires à la cartographie des Trames vertes urbaines, notre travail s’intègre en premier lieu dans une démarche technique. Celle-ci est centrée sur la mise en place d’une méthode de traitement d’images satellitaires Très Haute Résolution Spatiale Pléi
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Lindgren, Jessica. "Small remnant habitats : Important structures in fragmented landscapes." Doctoral thesis, Stockholms universitet, Institutionen för naturgeografi, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-148653.

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The world-wide intensification of agriculture has led to a decline in species richness due to land use change, isolation, and fragmentation of natural and semi-natural habitats in agricultural and forestry landscapes. As a consequence, there is a current landscape management focus on the importance of green infrastructure to mitigate biodiversity decline and preserve ecosystem functions e.g. pollination services and pest control. Even though intensification in agriculture has been ongoing for several hundreds of years, remnant habitats from earlier management practices may still be remaining w
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Olivier, Vanessa. "Managing mobile learning in a higher education environment / Olivier V." Thesis, North-West University, 2011. http://hdl.handle.net/10394/7297.

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The aim of this study is to conduct a thorough theoretical study on mobile learning (mlearning) in order to achieve the primary objective of the study which is to develop a general framework to implement and manage mobile technologies in a higher education environment. The focus of the literature study was to research the state of mobile technologies and their relevance to teaching and learning. The literature study investigate the implications of mobile technologies for students, lecturers and thus for the institution and provided an overview of frameworks found in literature with the emphasi
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Pratte, Stephen. "Transportation infrastructure and regional development in northern Manitoba: realities and prospects." 2012. http://hdl.handle.net/1993/5244.

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The relationship between transportation and economic development is well documented. Two requirements indispensable to this relationship are access (ability to reach a place) and connectivity (relationship of the place to others). The interaction of people and markets via transportation infrastructure facilitates trade and increased social interaction; all vital for development. This thesis examines the nature of access and connectivity of the multi-modal transport network (i.e. road, rail, water and air modes) of Northern Manitoba, a study area characterized by many small communities distri
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Carne, RJ. "Green infrastructure and green infrastructure planning : a review of concepts and practices with particular reference to Berlin, Germany." Thesis, 2016. https://eprints.utas.edu.au/23816/1/Carne_whole_thesis.pdf.

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This study aims to clarify the nature and characteristics of green infrastructure and green infrastructure planning; to identify general planning principles for green infrastructure; and to formulate pertinent research questions with respect to green infrastructure planning. A literature review and Berlin case study are employed to achieve these aims. While there are numerous definitions of green infrastructure, it is generally considered to comprise a network of green spaces and water features. Two key characteristics of green infrastructure are identified viz. multifunctionality and conne
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Jones, Matthew C. "Bridging the Gap: Community-Oriented Transit Development." 2014. https://scholarworks.umass.edu/masters_theses_2/23.

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The bedroom community has become a prevalent and oft-criticized part of the modern architectural landscape. These suburban towns have continually grown radially outward from major cities across the nation since the end of the Second World War. While these suburbs have served to fulfill housing needs and wants of society, pressure to develop has often forced this growth to occur at a much more rapid rate than a traditional community. This rapid development has led to poorly implemented infrastructure, especially with regard to walkability and public transportation, which has fallen short of mee
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Abad, Crespo Lorena Cristina. "Validating a bike network analysis score based on open data as a connectivity measure of urban cycling infrastructure adapted for European Cities." Master's thesis, 2019. http://hdl.handle.net/10362/67511.

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Dissertation submitted in partial fulfilment of the requirements for the Degree of Master of Science in Geospatial Technologies<br>Cycling has been considered a viable option to generate a modal shift from fossil dependent transportation modes. In this framework, measurements and tools that aid connected bicycle infrastructure planning have been developed. This is the case of the Bicycle Network Analysis score, a connectivity measure adapted for the U.S. It is based on the Levels of Traffic Stress methodology and computed mainly with OpenStreetMap data. Its aim is to quantify how well the
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Jospe, Alexandra C. "Aquatic Barrier Prioritization in New England Under Climate Change Scenarios Using Fish Habitat Quantity, Thermal Habitat Quality, Aquatic Organism Passage, and Infrastructure Sustainability." 2013. https://scholarworks.umass.edu/theses/1129.

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Improperly designed road-stream crossings can fragment stream networks by restricting or preventing aquatic organism passage. These crossings may also be more vulnerable to high flow events, putting critical human infrastructure at risk. Climate change, which will require access to suitable habitat for species persistence, and is also predicted to increase the frequency and magnitude of extreme floods, underscores the importance of maintaining stream connectivity and resilient infrastructure. Given the large number of road-stream crossings and the expense of replacement, it is increasingly imp
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Osei-Asiamah, Joel. "An investigation of teaching and learning methods in information technology : a case study at a selected high school in Kwa-Zulu-Natal." Diss., 2019. http://hdl.handle.net/10500/26464.

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The Information Technology (IT) as subject taught in South African secondary schools is considered to be a very perplexing subject. The IT as a subject has four learning outcomes which are E-Communication (weight 10%), Social and Ethical Issues (weight 10%), Hardware and Systems Software (weight 20%) and Programming and Software Development (weight 60%). The Programming and Software Development enjoys the highest weight as outcome of IT and it is believed to be the main cause of the difficulty of IT. The number of Grade 9 learners willing to offer IT as a subject in Grade 10 is decreasin
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