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Dissertations / Theses on the topic 'Crown fire'

Author: Grafiati

Published: 7 July 2024

Last updated: 31 July 2025

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1

Page, Wesley G. "Bark Beetle-Induced Changes to Crown Fuel Flammability and Crown Fire Potential." DigitalCommons@USU, 2014. https://digitalcommons.usu.edu/etd/2081.

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Recent outbreaks of mountain pine beetle (Dendroctonus ponderosae Hopkins) in lodgepole pine (Pinus contorta Dougl. ex Loud. var. latifolia Engelm.) forests and spruce beetle (Dendroctonus rufipennis Kirby) in Engelmann spruce (Picea engelmannii Parry ex Engelm.) forests have affected vast areas across western North America. The highlevels of tree mortality associated with these outbreaks have raised concerns amongst fire managers and wildland firefighters about the effects of the tree mortality on fire behavior, particularly crown fire behavior, as crown fires hinder the ability of firefighte

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Botequim, Brigite Roxo. "Tools to support design of fire-resistant landscapes in Portuguese ecosystems." Doctoral thesis, ISA/UL, 2015. http://hdl.handle.net/10400.5/9257.

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Doutoramento em Engenharia Florestal e dos Recursos Naturais - Instituto Superior de Agronomia<br>Forests are a key element in the Portuguese landscape. Moreover, fire hazard is a central challenge at national context. How can appropriate management potentially change fire behaviour, fire damage and the difficulty of fire suppression? What are the causal relationships between fire proneness, stand structure and forest stand composition? The common objective of the doctoral research among the five studies is to address the above issues based on principles of creating fire-resistant forests, und

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Deane, McKenna Daniel C. "Managing for Multiple Objectives in Southwestern Forests: Evaluating the Trade-offs between Enhancing Mexican Spotted Owl Nest Habitat and Mitigating Potential Crown Fire." DigitalCommons@USU, 2018. https://digitalcommons.usu.edu/etd/6878.

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The Forest Inventory and Analysis (FIA), the United States’ forest census, measured sixty-six Mexican spotted owl nest stands in order gain insight into the structure and composition of the nest habitat of this threatened species. I used these data, along with the greater FIA database and the Forest Vegetation Simulator to explore questions surrounding the management of Mexican spotted owl habitat, specifically how to balance the objective of sustaining and enhancing nest habitat in face of increasing forest fire size and severity in the Southwest. My research consisted of three studies. The f

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Lacy, Philip Alan Physical Environmental &amp Mathematical Sciences Australian Defence Force Academy UNSW. "Burning Under Young Eucalypts." Awarded by:University of New South Wales - Australian Defence Force Academy. Physical, Environmental & Mathematical Sciences, 2009. http://handle.unsw.edu.au/1959.4/43663.

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Fuels management in eucalyptus plantations is essential to minimise the impact of wildfire. Prescribed burning has the potential to reduce the fuel hazard in plantations, but is not routinely conducted due to concerns relating to tree damage. Through a series of experimental burns, the issues of tree damage are addressed and minimum tree sizes are recommended that are capable of withstanding the effects of low to moderate intensity fires. Data was collected between 2005 and 2007 over six sites, two species, and three age classes. Tree response results came from multiple measurements of over 17

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Arantes, Carolina de Silvério. "O processo de nucleação em ambiente savânico do cerrado." Universidade Federal de Uberlândia, 2016. https://repositorio.ufu.br/handle/123456789/13286.

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Fundação de Amparo a Pesquisa do Estado de Minas Gerais<br>Nucleation process occurs naturally at savannic areas as of the changes promoted by scattered trees that facilitate the colonization of crown area by new individuals and species, including species typical of forest environment. This process can be influenced by several factors such as the physical characteristics of the nuclei, the species of nucleus and the response of nuclei and colonizers to fire. The aim of this study was to describe the nucleation process in savannic environment of Cerrado, from: the description of the environment

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Jamaladdeen, Rawaa. "Investigation on Wildfire Flashovers in the Mediterranean Climate Regions with Emphasis on VOCs Contributions." Electronic Thesis or Diss., Chasseneuil-du-Poitou, Ecole nationale supérieure de mécanique et d'aérotechnique, 2023. http://www.theses.fr/2023ESMA0015.

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Cette thèse apporte des réponses aux demandes de la communauté des pompiers d'étudier les facteurs probables responsables de l'intensification des régimes de feux de forêt jusqu'aux flashovers en utilisant des approches expérimentales numériques et thermochimiques. Le modèle numérique est un modèle de dispersion de gaz validant les données expérimentales des essais en soufflerie pour résoudre la controverse quant à savoir si les accumulations de composés organiques volatils (COV) dans des topographies confinées finissent par induire des incendies de forêt. Il comprend un front de feu se propag

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7

Gupta, Indra. "Use of crown length to define stem form : segmented taper equation /." Thesis, Connect to this title online; UW restricted, 1986. http://hdl.handle.net/1773/5593.

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Mårtensson, Charlie, and Jacob Brännström. "Simulating Effects of Agent Velocity Changes on Crowd Behavior During Fire Emergency Evacuations." Thesis, KTH, Skolan för elektroteknik och datavetenskap (EECS), 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-302345.

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Fire emergencies are both deadly and difficult to accurately model in real life. Computer-simulated crowds provide a way to observe the possible outcome of a fire emergency evacuation without endangering real human subjects. However, many previous studies in this area do not account for the fact that evacuating people will not move at a constant velocity, but rather speed up to attempt to evade danger. The aim of this study is to explore how agents increasing their velocity when in close proximity to a fire threat affects the results of a simulated emergency evacuation from a classroom environ

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Farrell, Bethany Megan. "Gems for Her Crown: The Stained Glass Drum Oculi of Santa Maria del Fiore." Master's thesis, Temple University Libraries, 2013. http://cdm16002.contentdm.oclc.org/cdm/ref/collection/p245801coll10/id/233293.

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Art History<br>M.A.<br>The literature on the stained glass windows installed in the eight oculi of the drum of Santa Maria del Fiore are mainly found in the monographs of the four artists that provided the cartoons--Donatello, Lorenzo Ghiberti, Paolo Uccello, and Andrea del Castagno. Few studies have focused on the program in its entirety. This thesis will attempt to provide a more thorough understanding of the program. Analysis of the primary documents reveals how the windows functioned as part of the building and its liturgical and public life. In particular, the central argument is that Don

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10

Jaganathan, Sivakumar. "ON THE INCORPORATION OF THE PERSONALITY FACTORS INTO CROWD SIMULATION." Doctoral diss., University of Central Florida, 2007. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/4113.

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Recently, a considerable amount of research has been performed on simulating the collective behavior of pedestrians in the street or people finding their way inside a building or a room. Comprehensive reviews of the state of the art can be found in Schreckenberg and Deo (2002) and Batty, M., DeSyllas, J. and Duxbury, E. (2003). In all these simulation studies, one area that is lacking is accounting for the effects of human personalities on the outcome. As a result, there is a growing emphasis on researching the effects of human personalities and adding the results to the simulations to make th

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11

Sheng, Jie. "Managing big data from the crowd : strategic firm engagement with online social interactions." Thesis, University of Bristol, 2018. http://hdl.handle.net/1983/0fffae64-51e3-4da2-83f6-e5fd7d4b1bcc.

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In today’s digital economy, information sharing has become common practice and significantly influences individuals’ behaviours and preferences. The interactive and participative environment fosters customer engagement in voicing and communicating in the virtual network. The sheer amount of user-generated content from online social interactions offers intriguing opportunities for businesses to develop sustainable competitive advantages; yet, how firms can create value by managing and capitalising on crowd voices remains an under-explored facet of big data research. This thesis discusses strate

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Bailo, Francesco. "The citizen-user and the crowd-mediated politics of the Five Star Movement." Thesis, The University of Sydney, 2017. http://hdl.handle.net/2123/17068.

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This thesis described the trajectory of the Italy’s Five Star Movement (M5S, 2005- 2014) from the perspective of the citizens who, as Internet users, participated in in the political enterprise. Citizen-users, enabled and empowered by Internet and mobile technologies, shaped and sustained the identity and evolution of the movement that became the M5S. The case study selected for this research, the M5S, is exceptional due to the magnitude of its success; but its features (Internet-centered and fluid ideology) are becoming more common among political organisations in Western democracies. The goa

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13

Johnson, Sheena. "Sustaining and enhancing the geographical character of place indicators for assessing geotourism in the Crown of the Continent /." Connect to resources online, 2008. http://ulib.iupui.edu/utility/download.php?file=AATMR37479.pdf&ipfilter=campus_cas.

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Thesis (M.E.Des.)--University of Calgary, 2008.<br>Title from screen (viewed on July 23, 2009). Faculty of Environmental Design, University of Calgary. Advisor: Michael Quinn. Includes bibliographical references (leaves 100-107).

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Martin, Sonia. "Human Perception: A comparative study in how others perceive me and how I perceive myself." Thesis, Linnéuniversitetet, Institutionen för psykologi (PSY), 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-41445.

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The purpose of the study was to see how you as a person perceive yourself in comparison to how others perceive you. For this particular study a comparison has been made between people living together and how they view themselves versus how their friends/spouses/partners/family members view them. The hypothesis was that there would be a difference between how the individual living with you perceives you and how you perceive yourself. Individuals tend to stretch the truth about themselves and they tend to see themselves in a more positive light than others might see them. The study was conducted

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Xu, Hongyuan. "Modelling photosynthetic CO₂ fixation in radiata pine clones with contrasting crown characteristics at age five at Dalethorpe, Canterbury, New Zealand." Thesis, University of Canterbury. Forestry, 2000. http://hdl.handle.net/10092/7502.

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A program was developed to simulate the individual tree photosynthesis of ten Pinus radiata D. Don clones at age 5, and a comparison was made between the clones at a given condition to estimate photosynthesis from leaf level to tree level. The model linked the sub-models of leaf level photosynthesis, crown shape, foliage area, foliage area density distribution, and light penetration probability within tree crowns together to estimate total net photosynthesis on individual tree level. This study was carried out at a radiata pine clonal experiment at the same site with the same treatment located

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Al-Haddad, Ala'A. "Characterisation and performance of fibre-reinforced composite restorations." Thesis, University of Manchester, 2015. https://www.research.manchester.ac.uk/portal/en/theses/characterisation-and-performance-of-fibrereinforced-composite-restorations(bdcc1685-a341-4b8a-9e4a-542467f4b321).html.

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In the modern era of metal-free minimally-invasive dentistry, there is a growing tendency toward using metal-free restorative alternatives that provide not only excellent aesthetics but also enable superior durability. Fibre-reinforced composite (FRC) is one cost-effective alternative that fulfils the requirements of aesthetics and durability, and offers favourable physico-mechanical properties. Many FRC applications are well-documented in the literature, such as crowns and fixed partial dentures (FPD); however, their clinical implementation is still limited, owing to the lack of significant k

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Karnazes, Alexander John Peter. "Three's a crowd in two-and-a-half-party systems : how third parties have undermined their own policy objectives in five post-war democracies." Thesis, University of British Columbia, 2014. http://hdl.handle.net/2429/46026.

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This study examines the manners in which third parties’ electoral results and shifts in policy have affected major parties’ policy positioning. I respond to the work of Adams and Merrill (2006) and of Nagel and Wlezien (2010) by analyzing two-and-a-half-party systems that contain a centrist or a non-centrist third party. The cases include parties elected by a variety of voting systems and with various political traditions. Ultimately, I find that, over the past half-century, third parties in Austria, Canada, Germany, Ireland, and Luxembourg have regularly undermined the policy objectives most

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18

Nolde, Michael [Verfasser]. "Development of a web-based fire danger forecasting system for Mediterranean landscapes using open source software and crowd-sourced weather data - the isle of Sardinia (Italy) as an example / Michael Nolde." Kiel : Universitätsbibliothek Kiel, 2013. http://d-nb.info/1042440255/34.

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19

Kinuthia, Wanyee. "“Accumulation by Dispossession” by the Global Extractive Industry: The Case of Canada." Thèse, Université d'Ottawa / University of Ottawa, 2013. http://hdl.handle.net/10393/30170.

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This thesis draws on David Harvey’s concept of “accumulation by dispossession” and an international political economy (IPE) approach centred on the institutional arrangements and power structures that privilege certain actors and values, in order to critique current capitalist practices of primitive accumulation by the global corporate extractive industry. The thesis examines how accumulation by dispossession by the global extractive industry is facilitated by the “free entry” or “free mining” principle. It does so by focusing on Canada as a leader in the global extractive industry and the spr

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20

Alexander, Martin Edward. "Crown fire thresholds in exotic pine plantations of Australasia." Phd thesis, 1998. http://hdl.handle.net/1885/9555.

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Fire managers in Australasia currently lack the basis that would permit them to objectively evaluate the potential for crown fire development in exotic pine plantations under any specified set of fuel, weather and topographic conditions. The existing crown fire initiation models all have inherent weaknesses or lack applicability, thereby rendering their utility questionable. A model that would enable them to predict the onset of crowning has been developed from a combination of physical insights and mathematical modelling coupled with relevant field and laboratory experiments. The six model in

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21

Ross, Christopher Schultz Kaye Jason P. "Labile C constrains soil respiration in ponderosa pine forests during short-term precipitation manipulation and long-term crown fire recovery." 2008. http://etda.libraries.psu.edu/theses/approved/WorldWideIndex/ETD-3100/index.html.

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22

Bondoso, Pedro Miguel Ribeiro Tomé Tavares. "Estudo das condições de transição de um fogo para as copas das árvores." Master's thesis, 2014. http://hdl.handle.net/10316/38881.

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Dissertação de Mestrado Integrado em Engenharia Mecânica apresentada à Faculdade de Ciências e Tecnologia da Universidade de Coimbra.<br>Este estudo foi realizado no âmbito dos fenómenos de comportamento extremo de fogo, em que se pretendeu analisar as condições envolvidas na transição de fogo de superfície para fogo de copas e criar um guia de determinação de um potencial de ocorrência de focos secundários. A análise da ocorrência de fogos de copas baseou-se na determinação da perda de massa média das árvores durante a queima e na medição das velocidades de escoamento convectivas, da tempera

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23

Wu, Chung-Chuo, and 吳崇碩. "Development of a Personalized Crowd Guidance Algorithm for Emergency Fire Evacuation with Crowd Streaming Capability." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/59a2ra.

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碩士<br>中華大學<br>資訊工程學系碩士班<br>101<br>Because of building become higher and more complicated, people may not know the environment states and have not enough information for evacuation, that cause people lost the prime time of emergency evacuation. In this thesis, we propose a Density Balance Evacuation Guidance base on Crowd Scatter Guidance (DBCS) algorithm for emergency evacuation to make up for fire escape equipment can improve the speed and evacuation effect. The DBCS algorithm has consider the environment states, the people states of mind, the state of evacuation path, and the diffusivity of

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24

Maguire, Douglas A. "Construction of regression models for predicting crown development in southwestern Oregon Douglas-fir /." 1986. http://hdl.handle.net/1957/10364.

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Chao-Chang, Liu, and 劉兆昌. "Studies on Crown Structure and Biomass of A China-Fir Plantation." Thesis, 2004. http://ndltd.ncl.edu.tw/handle/84147030037054007647.

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碩士<br>國立中興大學<br>森林學系<br>92<br>The purpose of this study was to discuss crown structure and biomass of mature China-fir (Cunninghamia lanceolata). The study area is location in the central part of Taiwan, at compartment no.111, Pa-Hsien-Sha working circle and Shyr-Wen-Shi demonstration zone. Data of this study were collected from stand and 16 sample trees of a mature China-fir plantation. This study is based on theory way, and use forest measure method and statistics software, to analysis the relationships of DBH and the other attributes, and characteristic of crown form and crown structure, an

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LO, PEI-HUA, and 羅培華. "Z-Level Contour Method Applied to Dental Crown Machining in Five-Axis Milling." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/68m7ka.

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碩士<br>國立中正大學<br>機械工程系研究所<br>105<br>In a dental CAD/CAM system, when milling the concave area of the inside surface of a tooth crown, the machining direction of the tool has to be adjusted constantly in order to avoid gauging or over-cutting. For some under-cut area, the tool also needs to be tilted to machine the under-cut area, otherwise the crown may not seat properly on the abutment due to interference. The purpose of this research is to establish a new 5-axis tool path generation algorithm. Based on the triangular mesh model, a hybrid C-Space and Centroid method is proposed to quickly sear

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Weiskittel, Aaron R. "Alterations in Douglas-fir crown structure, morphology, and dynamics imposed by the Swiss needle cast disease in the Oregon Coast Range /." 2003. http://hdl.handle.net/1957/10422.

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28

Moria, Kawther. "Computer vision-based detection of fire and violent actions performed by individuals in videos acquired with handheld devices." Thesis, 2016. http://hdl.handle.net/1828/7423.

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Advances in social networks and multimedia technologies greatly facilitate the recording and sharing of video data on violent social and/or political events via In- ternet. These video data are a rich source of information in terms of identifying the individuals responsible for damaging public and private property through vio- lent behavior. Any abnormal, violent individual behavior could trigger a cascade of undesirable events, such as vandalism and damage to stores and public facilities. When such incidents occur, investigators usually need to analyze thousands of hours of videos recorded us

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Schmidt, Matthias. "Prognosemodelle für ausgewählte Holzqualitätsmerkmale wichtiger Baumarten." 2001. http://hdl.handle.net/11858/00-1735-0000-0006-B0EC-5.

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