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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.
81

An initial study to determine a friction-factor model for ground vegetation /

Kenney, Peter Martin. January 2009 (has links)
Dissertation (Ph.D.)--University of Toledo, 2009. / Typescript. "Submitted in partial fulfillment of the requirements for the degree of Doctor of Philosophy in Engineering." Bibliography: leaves 51-53.
82

Holocene fire and climate in rangeland ecosystems of Southwestern Idaho

Nelson, Nathan Alfred. January 2009 (has links)
Thesis (M.S.)--Boise State University, 2009. / Title from t.p. of PDF file (viewed Mar. 29, 2010). Includes abstract. Includes bibliographical references (leaves 81-91).
83

Forest succession and tree dispersion patterns on a Connecticut traprock ridge : ten years after fire at Onion Mountain /

Groff, Cyd Roman. January 2000 (has links)
Thesis (M.A.)--Central Connecticut State University, 2000. / Thesis advisor: Kim A. Wilson. " ... in partial fulfillment of the requirements for the degree of Master of Arts in Biology." Includes bibliographical references (leaves 56-62).
84

A 1200-year record of forest fire history from macroscopic charcoal preserved in lake sediment, south-central Yukon Territory /

Marcantonio, Richard V. O. January 1900 (has links)
Thesis (M. Sc.)--Carleton University, 2007. / Includes bibliographical references (p. 88-98). Also available in electronic format on the Internet.
85

Three enabling technologies for vision-based, forest-fire perimeter surveillance using multiple unmanned aerial systems /

Holt, Ryan Samuel, January 2007 (has links) (PDF)
Thesis (M.S.)--Brigham Young University. Dept. of Electrical and Computer Engineering, 2007. / Includes bibliographical references (p. 79-82).
86

Post-fire recovery of carbon and nitrogen in sub-alpine soils of South-eastern Australia /

Shrestha, Hari Ram. January 2009 (has links)
Thesis (MForSc)--University of Melbourne, Dept. of Forest and Ecosystem Science, 2009. / Typescript. Includes bibliographical references (p. 113-140)
87

Vegetation and soil microbial communities three years after wildfire in spruce-fir forests of northwestern Wyoming /

Hooke, Jennifer Suzanne. January 1900 (has links)
Thesis (M.S.)--Oregon State University, 2005. / Printout. Includes bibliographical references. Also available on the World Wide Web.
88

Spatially explicit inter-temporal forest management decision under the risk of fire /

Konoshima, Masashi. January 1900 (has links)
Thesis (Ph. D.)--Oregon State University, 2007. / Printout. Includes bibliographical references (leaves - ). Also available on the World Wide Web.
89

Condições que potencializam a propagação de incêndios florestais e a emissão de poluentes gasosos para a atmosfera /

Amaral, Simone Simões. January 2017 (has links)
Orientador: João Andrade de Carvalho Junior / Coorientadora: Maria Angélica Martins Costa / Banca: Luiz Fernando Costa Nascimento / Banca: Silvio Jorge Coelho Simões / Banca: Turíbio Gomes Soares Neto / Banca: Cristiane Aparecida Martins / Resumo: Apesar das novas tecnologias de gerenciamento e combate aos incêndios, o fogo em florestas ainda ocorre em grande escala, causando danos ao meio ambiente e à sociedade. Os danos causados pelo fogo são dependentes de fatores como combustível, clima e topografia do terreno. Para minimização e controle dos efeitos causados pelo fogo é importante o estudo de tais fatores. Assim, o objetivo deste trabalho foi analisar a condição que potencializa a propagação do fogo e a emissão de poluentes gasosos. O estudo da condição que potencializa o fogo e suas emissões foi realizado para biomassas de florestas plantadas. Os principais fatores, que afetam o fogo e suas emissões, foram avaliados através de experimentos de laboratório. Os fatores de controle avaliados foram: espécie, percentual de liteira, carga de combustível, irradiância solar, umidade relativa, velocidade do vento e inclinação do terreno. Estes experimentos foram planejados e analisados utilizando a matriz L18 da metodologia de Taguchi. O dispositivo de queima foi adaptado, para que o estudo pudesse ser realizado. As emissões também foram quantificadas para floresta nativa (biomassa da Amazônia), com experimentos conduzidos em campo e em laboratório. Para os níveis dos fatores estabelecidos, em laboratório, a condição encontrada que potencializou a propagação do fogo e a emissão de poluentes gasosos foi a queima de Eucalyptus sp., com aproximadamente 30 % de liteira, carga de 2,5 kg de combustível, nível mínimo de umidade ... (Resumo completo, clicar acesso eletrônico abaixo) / Abstract: Despite the new technologies of management and fire fighting, fire in forests still occurs on a large scale, causing damage to the environment and society. The damages caused by the fire are dependent on factors such as fuel, weather, and topography of the land. To minimize and control the effects caused by fire is important the study of such factors. Thus, the objective of this work was to analyze the condition that enhances the spread of fire and the emission of gaseous pollutants. The study of the condition that enhances the fire and their emissions was conducted for biomasses of planted forests. The main factors, which affect the fire, were evaluated through laboratory experiments. The control factors evaluated were: specie, percentage of litter, fuel load, irradiance, relative humidity, wind speed and inclination. These experiments were designed and analyzed using the matrix L18 of Taguchi methodology. The burning device was adapted, so that the study could be performed. The emissions were also quantified to native forest (Amazon biomass), with experiments conducted in the field and in the laboratory. For the levels of the established factors, the condition found that enhanced the spread of fire and the emission of gaseous pollutants was: Eucalyptus sp. burning, with approximately 30% litter, 2.5 kg of fuel load, minimum relative humidity (40%), wind velocity of 3.5 m/s and inclination of 30°. The maximum irradiance (1kW/m2 ) potentiated the gaseous emissions, whose emission factor values were 1,495 ± 62 g/kg for CO2, 71.52 ± 4.33 g/kg for CO, 1.96 ± 0.78 g/kg for NO and 14.75 ± 3.55 g/kg for UHC. Experiments conducted with irradiance at level 1 enhanced the spread of fire. When the results of the Amazon biomass burning were compared, field burning presented higher emissions per hectare, for partially oxidized compounds / Doutor
90

The immediate and long term (1 year) effects of a natural forest fire (May 1972) on soil invertebrates of Black spruce (Picea marina Mill) humus at Mt. Tremblant, Quebec.

Jones, Mona Theresa January 1976 (has links)
No description available.

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