Dissertationen zum Thema „Environmental communication and performativity“
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Sussfeld, Frédérique. „Entre expériences, récits et actions la communication du mouvement de la transition écologique traduit-elle un changement d’heuristique?“ Electronic Thesis or Diss., Aix-Marseille, 2021. http://www.theses.fr/2021AIXM0069.
The ecological transition is investing the field of environmental communication by mobilising two distinct communicational phenomena, documentary film and transitional civic initiatives revealing attitudes that renew the interconnection between our tradition and the living world. By letting our comprehension of the way species function broaden, the permaculture-inspired ecological transition would allow for another relation to others. In communication sciences, players of the transition movement would be focusing on the present in numerous countries, thus encouraging the creativity of its protagonists based on their abilities and ensuring that daily actions would build the world of tomorrow. Developed by individuals with increased capabilities on environmental issues, inclusive, this cultural movement would rely on different narrative structures composing a communication gathering facts and sensitive experiences. From a corpus of movies that marked a turning point in the field of ecological documentary films, and the observation of a new permaculture-based transition project, the research conducted in information and communication sciences using an inductive and anthropological method prioritises the study of processes set up by the protagonists as well as the narrative processes employed, allowing to access interpersonal and inter-groups communications showing how people integrate notions of culture, performativity and acculturation in their daily lives. In a context where environmental communication calls up notions of fear, catastrophe and anxiety is the communication around the transition movement showing a change in heuristics?
Hales, Robert. „People, power and the state : Performativity and the Traveston Crossing Dam“. Thesis, Griffith University, 2010. http://hdl.handle.net/10072/365617.
Thesis (PhD Doctorate)
Doctor of Philosophy (PhD)
School of Humanities
Arts, Education and Law
Full Text
Harper, Todd L. „The Art of War: Fighting Games, Performativity, and Social Game Play“. Ohio University / OhioLINK, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1283180978.
Boyes, Maria. „A decent writer: professional environmental communication among environmental managers“. Title page, table of contents and abstract only, 2004. http://hdl.handle.net/2440/37949.
Thesis (Ph.D.)--School of Humanities, 2004.
Kolar, Jasin, und Johan Persson. „Green Transportation External environmental communication“. Thesis, Kristianstad University College, Department of Business Administration, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:hkr:diva-4491.
Climate change is a hot topic today. It is important for companies to take
responsibility for the environment. For companies it is also important to
communicate their environmental efforts to its customers.
The aim of this study is to analyze how transportation companies communicate their
environmental efforts on the web. Europe’s largest transportation companies as well
as Asian and North American airlines are studied. Companies’ websites were
examined and evaluated on several criteria.
The study surprisingly showed that a lot of companies did not have any external
communication due to unavailable websites. There are significant geographical
differences in how companies communicate green.
Many transportation companies provide environmental information on their websites
however they need to be more convincing in doing so.
Brooks, Billy, David Blackley und Megan Quinn. „Appalachian Environmental Cancer Communication Workshop“. Digital Commons @ East Tennessee State University, 2011. https://dc.etsu.edu/etsu-works/3193.
He, Yin. „Immersive Storytelling for Environmental Communication“. Thesis, Linköpings universitet, Institutionen för datavetenskap, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-158200.
Steinweg, David A. „Improvisational Music Performance: On-Stage Communication of Power Relationships“. Scholar Commons, 2012. http://scholarcommons.usf.edu/etd/4407.
Magerøy, Marina. „The communication of environmental impacts through environmental product declarations“. Thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for energi- og prosessteknikk, 2011. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-15078.
Betermier, Katherine. „Organic: Designing Communication for Environmental Values“. Research Showcase @ CMU, 2011. http://repository.cmu.edu/theses/4.
Mahl, Beate. „Environmental Science Communication at Swedish universities“. Thesis, Umeå universitet, Sociologiska institutionen, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-180898.
de, Lima Ottoni Frederico. „Product-Oriented Environmental Management: : A System for Product Environmental Performance Communication“. Thesis, KTH, Industriell ekologi, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-55363.
Ramirez-Andreotta, Monica, Julia Brody, Nathan Lothrop, Miranda Loh, Paloma Beamer und Phil Brown. „Improving Environmental Health Literacy and Justice through Environmental Exposure Results Communication“. MDPI AG, 2016. http://hdl.handle.net/10150/621420.
Bugg, Samuel R. IV. „Internship with Environmental Quality Management, Inc. - Technical Communication and Environmental Compliance“. Miami University / OhioLINK, 2008. http://rave.ohiolink.edu/etdc/view?acc_num=miami1212758588.
Weber, Lydia, und Dominique Kuehn. „The Challenges of Internal Communication about Environmental Sustainability“. Thesis, Uppsala universitet, Företagsekonomiska institutionen, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-257380.
Sprada, Mira Beatriz. „Environmental communication, pro-environmental behavior, and ENGOs: Understanding motivation and strategy across nations“. Kent State University / OhioLINK, 2021. http://rave.ohiolink.edu/etdc/view?acc_num=kent1620042592120961.
Till, Anilla. „Conceptualising Nonviolent Environmental Communication : Examining NVEC features in an Environmental Social Change Campaign“. Thesis, Jönköping University, HLK, Medie- och kommunikationsvetenskap, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:hj:diva-53491.
Gordon, Shira D. „Environmental Interference and Seismic Communication in Wolf Spiders“. University of Cincinnati / OhioLINK, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1281459002.
Yang, Liuqing. „Biosocial reciprocity in environmental communication: a study of giant panda conservation communication in China“. Texas A&M University, 2005. http://hdl.handle.net/1969.1/4868.
Mills, Justin W. (Justin Wade) 1974. „Increasing design communication using virtual reality“. Thesis, Massachusetts Institute of Technology, 1999. http://hdl.handle.net/1721.1/80152.
Volle, Alexandre. „Information communication about environmental quality by markets and NGOs“. Thesis, Montpellier, 2019. http://www.theses.fr/2019MONTD028.
This thesis focuses on the question of the information transmitted to consumers by the markets and Non Governmental Organizations (NGOs) on the environmental quality of products. This work takes place in a context where, on one hand, consumers' awareness increase concerning this dimension, and on the other hand, firms increasingly display a social or environmental responsibility whose reality is often contested. The first paper investigates the role of price as a possible substitute channel of communication. The purpose is to examine how a green firm competing against a brown firm can solve the asymmetric information issue. For this purpose, we develop a simple vertically differentiated duopoly model where firms can signal their quality through prices. To represent an increasing pressure of the competition on the low-quality segment, we make the hypothesis that the brown good is sold at the marginal cost. The result is extreme: there do not exist any situations where the green firm can solve the asymmetric information issue. The second paper takes into account the informative role of NGOs concerning the type of firms. We are interested in how their informational behavior impacts the signaling strategy of firms. The interaction between the price signaling strategy of the firm and the information released by the NGO yield fruitful results concerning the path of green information.When consumers cannot verify corporate social goodwill, firms may be reluctant to uphold a pledge of social goodwill. We show how imperfect monitoring can mitigate this moral hazard problem. We augment the standard model of price signaling by allowing consumers to use the results of independent monitoring as a complementary source of information. Monitoring corrects for consumers' arbitrary beliefs. Before sending a price signal to consumers, firms pledge or not to invest in social goodwill.With no monitoring, firms do not abide by their pledges of social goodwill when they fail to send a credible signal via price.With monitoring, there exist equilibria in which a firm invests in social goodwill and succeeds in signaling its choice via price.It is worth mentioning that the hard evidence displayed by NGOs can be of two different natures. In this Chapter, the types of discovered evidence go in pairs with shaming and championing strategies. In this spirit, we endogenize the signaling choice of the NGO, which interacts with the signaling strategy of a firm. We seek to analyze the effect of these two different strategies on the equilibrium of signaling of the firm and the optimal informative behavior of the NGO.The technology choice here is exogenous, and the consumer is perfectly Bayesian according to the two different signals received. Either a proof discredits the firm, or a proof accredits the firm. We find that the shaming strategy reduces the signaling cost for the high type and can even restore the perfect information outcome. The championing strategy can make incentives for the market to reveal the truth disappear. Concerning the optimal informative behavior of the NGO, if the market reveals information, the NGO is indifferent between adopting a shaming strategy and adopting a championing strategy. When the market conceals information, the strategy depends on the difference between the shaming and championing efficiency and the distribution of the firm in the market
Nurhayati, Ratna. „An empirical study of corporate social and environmental communication“. Thesis, Curtin University, 2014. http://hdl.handle.net/20.500.11937/812.
RISCAZZI, PAOLA. „Nutritional, environmental optimization and sustainability communication of food productions“. Doctoral thesis, Università Cattolica del Sacro Cuore, 2013. http://hdl.handle.net/10280/1742.
The thesis begins with an analysis of the nutritional aspects of foods. In particular, the concept of balanced diet has been discussed, by referring to the principles of "mediterranean diet". Just from this food model, the “optimation” draws inspiration, a technique developed and used to plan meals consistent with specific nutritional standards (15/30/55 between protein, fat and carbohydrate on the total energy intake, typically Mediterranean). These food preparations have been tested through sensory analysis methods. The next step is the extension of "nutritional optimization" concept to the "environmental optimization” one, owing to the presumed lower environmental impact of the Mediterranean diet. LCA (Life Cycle Assessment) is the technique used to assess the environmental impact of various food products, such as frozen vegetables, cured meats, dairy products. A further step is the creation of a communication tool, a new environmental label, designed to be used by companies to communicate their environmental performance and therefore their commitment to continuous improvement, and by consumers to obtain more information on the environmental impact of the foods daily consumed, in order to increase their critical sense and make purchases in a conscious way.
RISCAZZI, PAOLA. „Nutritional, environmental optimization and sustainability communication of food productions“. Doctoral thesis, Università Cattolica del Sacro Cuore, 2013. http://hdl.handle.net/10280/1742.
The thesis begins with an analysis of the nutritional aspects of foods. In particular, the concept of balanced diet has been discussed, by referring to the principles of "mediterranean diet". Just from this food model, the “optimation” draws inspiration, a technique developed and used to plan meals consistent with specific nutritional standards (15/30/55 between protein, fat and carbohydrate on the total energy intake, typically Mediterranean). These food preparations have been tested through sensory analysis methods. The next step is the extension of "nutritional optimization" concept to the "environmental optimization” one, owing to the presumed lower environmental impact of the Mediterranean diet. LCA (Life Cycle Assessment) is the technique used to assess the environmental impact of various food products, such as frozen vegetables, cured meats, dairy products. A further step is the creation of a communication tool, a new environmental label, designed to be used by companies to communicate their environmental performance and therefore their commitment to continuous improvement, and by consumers to obtain more information on the environmental impact of the foods daily consumed, in order to increase their critical sense and make purchases in a conscious way.
Davis, Andrea M. „Dragging Identity: A Critical Ethnography of Nightclub Space(s)“. Bowling Green, Ohio : Bowling Green State University, 2008. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=bgsu1213893377.
Zwickle, Adam K. „Communicating Environmental Risks“. The Ohio State University, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=osu1397500693.
Brucker, David A. „Theorizing The Effects of Color, Environmental Space, Culture and Gender on Communication“. Wright State University / OhioLINK, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=wright1367586486.
Allard, Karin. „VARFÖR GÖR DE PÅ DETTA VISET? : Kommunikativa praktiker i flerspråkig undervisning med svenskt teckenspråk som medierande redskap“. Doctoral thesis, Örebro universitet, Institutionen för humaniora, utbildnings- och samhällsvetenskap, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:oru:diva-28637.
Johnson, Matthew. „An Ethnography of the Bay Area Renaissance Festival: Performing Community and Reconfiguring Gender“. Scholar Commons, 2010. http://scholarcommons.usf.edu/etd/3509.
Stoltenow, Petersen Kelsi K. „YouTube beauty vlogs: How social media blurs social boundaries“. The Ohio State University, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=osu1523368597591707.
Connelly, Heather. „Speaking through the voice of another : how can art practice be used to provoke new ways of thinking about the transformations and transitions that happen in linguistic translation?“ Thesis, Loughborough University, 2015. https://dspace.lboro.ac.uk/2134/17999.
Pietroforte, Roberto 1948. „Communication and information in the building delivery process“. Thesis, Massachusetts Institute of Technology, 1992. http://hdl.handle.net/1721.1/13097.
Hussein, Karim Mohie El Din 1972. „Communication facilitators for a distributed collaborative engineering environment“. Thesis, Massachusetts Institute of Technology, 1995. http://hdl.handle.net/1721.1/37787.
Includes bibliographical references (leaves 90-93).
by Karim Mohie El Din Hussein.
M.S.
Zelak, Katheryn Zelak. „An exploratory study of factors influencing zoo educator message communication“. The Ohio State University, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=osu1524048203458515.
Istvan, Laurence Bryce. „Communicating the arcane : a conceptual framework for environmental interpretation /“. Thesis, Connect to this title online; UW restricted, 1993. http://hdl.handle.net/1773/5552.
Bartock, Laura. „Walking the talk? Examining the practical application of models of science communication in long-term ecological research sites“. Thesis, State University of New York Col. of Environmental Science & Forestry, 2015. http://pqdtopen.proquest.com/#viewpdf?dispub=1596127.
Science communication research has developed theories about the way science communication operates in practice, but further investigation is needed to understand how well these models describe the practice of science communication on the ground. This thesis explores the relationship between theoretical models of science communication and the practice of science communication in long-term ecological research sites (LTERs). In particular, this exploratory study focuses on the deficit model, the dialogue model, and the participation model. I conducted semi-structured interviews to understand how science communication practitioners’ views about their work relate to established models of science communication. In particular, I asked about how they view their roles and responsibilities, how they view their audience(s), and how they view ethical considerations of their work. Results suggested that the dialogue model was the most dominant model. The deficit and participation models also appeared, though less frequently. Many practitioners are aware of the shortcomings of deficit model approaches to science communication, but may not have the resources or experience necessary to engage in the intensive public engagement activities of participation model approaches.
Ellis, Kimberly. „Mothers for the Environment| Spreading the Word Far and Wide on How to Take Better Care of our Environment“. Thesis, Prescott College, 2016. http://pqdtopen.proquest.com/#viewpdf?dispub=1605749.
This paper argues the importance of communicating messages to a general public about the important issues of the environmental state of the Earth, and it proposes that solutions need to be offered to help each individual act ecologically responsibly when using Earth’s natural resources. Further, this paper suggests that choosing an effective medium to engage in communication with a general public is crucial.
To this end, I asked two questions that formed the basis of my research: 1. What research or personal experiences suggest that there is an urgent need to communicate messages to a general public about the environmental state of the Earth? 2. Assuming the Earth is in a dire state and its environmental well-being is in jeopardy, through which medium of communication might one achieve the most widespread and significant impact in an effort to spread environmental messages?
I realized that the best way for the general public to become informed and guided is via short, dramatized films that take one environmental subject at a time, bring attention to an issue, and suggest a solution that each individual can exercise. A short film on fossil fuel use, specifically electricity, serves as the data section of my thesis, and I reflect on the making of that film in my conclusion.
Welden, Robert Foster. „Framing Human-Wildlife Conflict in the Intermountain West| Content Analysis of Daily Newspapers to Diverse Audiences“. Thesis, Colorado State University, 2018. http://pqdtopen.proquest.com/#viewpdf?dispub=10635671.
Connection to and appreciate for the natural world are directly linked to positive experiences participating in outdoor nature-based activities. These direct experiences have been declining over the past decade, causing concerns about the perceptions of nature by populations that don’t participate in nature-based activities. This study examines framing of media coverage about human-wildlife conflicts and its implications for perception building by those audiences with less experience in the natural world. Data were collected via daily newspapers across the Intermountain West from 2010 to 2015. Results demonstrated that there were significant differences between newspapers serving larger, more urban communities and smaller, more rural communities. Findings indicate that urban audiences are exposed to messages that discourage participation in the natural world. Messages regarding human-wildlife conflict in newspapers serving larger, more urban communities should be reframed to avoid negative perceptions of nature and to motivate connection to the natural world.
Rajiwade, Swapnil Shankar. „Assessment framework for wireless V2V communication-based ITS applications“. Thesis, Massachusetts Institute of Technology, 2011. http://hdl.handle.net/1721.1/70767.
Cataloged from PDF version of thesis.
Includes bibliographical references (p. 87-91).
Inter-vehicle communication enabled by wireless technology is an emerging area of Intelligent Transportation Systems (ITS). This technology has generated great interest among automobile manufacturers and ITS researchers alike because of its potential to improve safety and non-safety ITS applications by supporting data collection and dissemination at the individual vehicle level. A modelling framework based on a microscopic traffic simulator is presented in this thesis to explore the effects of wireless Vehicle-to-Vehicle (V2V) communication based ITS applications on traffic performance. Microscopic traffic simulators describe the interaction between drivers and infrastructure at individual vehicle level. The behaviour models in microscopic traffic simulators describe driving decisions like route choice, car-following and lane-changing. The existing behaviour model is extended to incorporate the effect of V2V communication based applications by tying information generated by the application to the behaviour model. A case study on a road network in Singapore with green light prediction application as the V2V communication application is implemented. The car-following model in MITSIMLab is modified to account for speed advisories generated by green light prediction application. The application shows gains in travel time savings and a smoother traffic flow as a result of the green light prediction. Higher improvements across penetration rates were observed at high demand levels. The incremental impact of the application on traffic performance tapers off at higher penetration rates. Drivers responding to the speed advisories also affect vehicles immediately following them. Hence the effective penetration rate of the application is higher than actual penetration rate. The results imply that the green light prediction application would reduce the average number of halts per trip by approximately 10% at existing travel demand. The current model can be extended to test other V2V based ITS applications and to couple with a wireless network simulator to represent wireless data flows more realistically.
by Swapnil Shankar Rajiwade.
S.M.
Jabbour, Imad W. „Simulation of models and algorithms for wireless communication systems“. Thesis, Massachusetts Institute of Technology, 2007. http://hdl.handle.net/1721.1/38950.
Includes bibliographical references (leaf 61).
The thesis presents a set of simulations of models and algorithms for wireless communication systems. The simulations are developed using graphical MATLAB interfaces, and cover the fundamentals of wireless channel modeling, the advantages and limitations of antenna beamforming in multiuser systems, and the underlying principles of OFDM. The thesis targets two types of audiences in particular: students and wireless industry professionals. For the former, it constitutes an excellent complement to lecture notes, and for the latter, it is an efficient way to review the key principles and technologies. In either case, the simulations provide an intuitive view of the addressed topics, thus allowing users to comprehend the basics of wireless channels and phenomena without delving into mathematical complexities.
by Imad W. Jabbour.
S.M.
Duberry, Jérôme. „Environmental governance and new ICTs : the impact of new information and communication technologies on global environmental governance“. Doctoral thesis, Universitat Pompeu Fabra, 2015. http://hdl.handle.net/10803/295839.
La tesis doctoral trata el impacto de la generalización de las nuevas tecnologías de la información y de la comunicación (TIC) sobre la gobernanza global del medio ambiente. El objetivo de la investigación es analizar la influencia de estas nuevas tecnologías sobre la legitimidad de los mecanismos de gobernanza global y sobre las capacidades de los actores globales no estatales –como parte de la sociedad civil global– implicados en estos procesos de política medioambiental . Después de definir el contexto en el cual emergen las nuevas TIC, la tesis desarrolla dos casos de estudio. El primero de ellos analiza la evolución del proceso de resoluciones y recomendaciones de la Unión Internacional para la Conservación de la Naturaleza (UICN) y permite ilustrar que el uso de las nuevas TIC mejora la participación en este proceso y la creación de consenso en torno a determinados valores. Por ello, el uso de las nuevas TIC tiene un impacto positivo sobre la legitimidad de este mecanismo de gobernanza global. El segundo caso analiza el uso de las nuevas TIC por parte de la UICN y demuestra que no tiene un impacto sustancial sobre las capacidades internas de esta organización. Sin embargo, sí cabe reseñar un impacto positivo pero limitado sobre las competencias externas de la UICN, de modo que mejora la capacidad de la organización para comunicar tan sólo con su audiencia tradicional.
Petersen, Sara, und Hilda Lundin. „The Pitfalls of Communicating the Implementation of Environmental Regulations“. Thesis, Linköpings universitet, Företagsekonomi, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-167717.
Walsh, Kelly. „COMMUNICATION CONSULTANTS AND PUBLIC PARTICIPATION PRACTICES: AN INTERNSHIP WITH ENVIRONMENTAL QUALITY MANAGEMENT, INC“. Miami University / OhioLINK, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=miami1399887095.
Thomas, Christopher Scott. „Engendering environmental justice: women's rhetorical collaboration for a more just and sustainable world“. Diss., University of Iowa, 2018. https://ir.uiowa.edu/etd/6308.
Seo, Wang-Jin. „Political ecology and environmental justice analysis of information and communication technology“. Access to citation, abstract and download form provided by ProQuest Information and Learning Company; downloadable PDF file, 273 p, 2010. http://proquest.umi.com/pqdweb?did=1993336291&sid=7&Fmt=2&clientId=8331&RQT=309&VName=PQD.
Mulligan, Jean A. „Toward proactive environmental risk communication, a look at Alberta's petroleum industry“. Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk2/tape17/PQDD_0010/MQ26776.pdf.
Fang, Weiwei. „Motivations and Engagement: Environmental Communication on SNS in China and Sweden“. Thesis, Uppsala universitet, Institutionen för informatik och media, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-189265.
Fraenkel, Elina. „The Greener Outdoors : The importance of environmental communication with the customer“. Thesis, Uppsala universitet, Institutionen för geovetenskaper, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-412605.
Cook, Michelle Elizabeth. „Environmental and social factors influence communication used during crayfish agonistic interactions“. Bowling Green State University / OhioLINK, 2008. http://rave.ohiolink.edu/etdc/view?acc_num=bgsu1212431269.
Almeida, Rodrigo Coelho. „A multi-technology network for environmental data gathering through opportunistic communication“. Master's thesis, Universidade de Aveiro, 2017. http://hdl.handle.net/10773/23783.
O conceito de Smart City surge da combinação do paradigma de Internet of Things (IoT) sobre contextos urbanos aliado à exploração de soluções de Tecnologias de Informação e Comunicação (TIC). O típico cenário de Smart City tem de lidar com desafios, tais como as elevadas quantidades de sensores e geradores de dados, dos quais alguns são colocados em dispositivos de grande mobilidade, visando a recolha e geração de todo o tipo de informações e levando ao aumento do número de dispositivos comunicantes. Esta dissertação foca o desenvolvimento e implementação de uma plataforma heterogénea de sonorização ambiental com o objectivo de servir de infraestrutura para aplicações no âmbito das Smart Cities. Esta pretende tirar proveito da utilização de múltiplas tecnologias de comunicação, nomeadamente tecnologias de longo e curto alcance. Para al em disto, visto que a plataforma visa ambientes urbanos, esta tira proveito de uma rede oportunista e tolerante a atrasos, Delay Tolerant Network (DTN), através de entidades m oveis que circulam pela cidade, nomeadamente bicicletas. Assim sendo, esta dissertação propõe: (1) o desenho e desenvolvimento da rede e dos seus constituintes; (2) uma extensão a um protocolo de controlo de acesso ao meio, Medium Access Control (MAC), para a tecnologia LoRa com o objectivo de o dotar compatível para ambientes de gateways múltiplas; (3) novas estratégias de encaminhamento para a rede tolerante a atrasos, tendo em consideração a topologia e as características apresentadas por esta. As avaliações realizadas permitiram concluir que o protocolo MAC para LoRa em ambientes de gateways múltiplas proposto contribui para um aumento da escalabilidade da rede, bem como para uma melhoria do seu desempenho. Relativamente às estratégias de encaminhamento propostas para a DTN, os testes realizados permitiram avaliar o impacto que cada estratégia tem sobre o comportamento da rede, nomeadamente a taxa de entrega dos pacotes de dados, a sobrecarga da rede, o número de pacotes transmitidos, entre outros. Com estes resultados foi possível perceber as in- suficiências que as funcionalidades propostas têm sobre a solução geral, e identificar as caraterísticas necessárias de uma solução escalável para a recolha de dados massivos num ambiente de IoT.
The Smart City concept is the combination of the Internet of Things (IoT) paradigm under an urban context with the exploitation of Information and Communication Technologies (ICT) solutions. The typical Smart City scenario has to deal with an extensive amount of sensors and data generators, some of them placed in high mobile devices, deployed to collect and generate all type of information which will increase the number of communicating machines. This dissertation focuses on the development and implementation of a heterogeneous environmental sensing platform to serve as an infrastructure for Smart City applications. It aims to take advantage of the use of multiple communication technologies, namely long and short range. Being within an urban environment, the platform bene ts from an opportunistic and Delay Tolerant Network (DTN) through mobile entities that travel over the city, such as bicycles. Therefore, this dissertation proposes: (1) the design and development of the network and its elements; (2) an extension to a LoRa Medium Access Control (MAC) protocol in order to endow it with capabilities to operate in multi-gateway environments; and lastly, (3) new forwarding strategies for the opportunistic network that takes into consideration the network topology. The performed evaluations showed that the proposed multi-gateway LoRa MAC protocol contributes to increase the LoRa network scalability, as well as its performance. The performed tests to the proposed DTN forwarding strategies evaluate the impact of each strategy on the network behavior, namely the delivery ratio, network overhead, number of transmitted packets, among others. As a result, it is possible to perceive which are the in- uences introduced by the proposed functionalities on the overall solution, and identify the characteristics of a scalable solution to collect massive data in an IoT environment.