Dissertations / Theses on the topic 'Tropics'
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鍾美芬 and Mei-fun Choong. "Patterns of herbivory in tropical fagaceae." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1997. http://hub.hku.hk/bib/B31235694.
Full textJin, Daeho. "The impact of ENSO on the extratropics." Fairfax, VA : George Mason University, 2008. http://hdl.handle.net/1920/3158.
Full textVita: p. 160. Thesis director: Ben P. Kirtman. Submitted in partial fulfillment of the requirements for the degree of Doctor of Philosophy in Climate Dynamics. Title from PDF t.p. (viewed July 18, 2008). Includes bibliographical references (p. 152-159). Also issued in print.
Spengler, Thomas. "Influence of the ambient flow upon Rossby wave propagation between the tropics and extra-tropics /." Zürich : ETH, 2008. http://e-collection.ethbib.ethz.ch/show?type=diss&nr=17932.
Full textBaimey, Hugues Kossi. "Scutellonema bradys as a pathogen of yam in Benin." Thesis, Pretoria : [s.n.], 2006. http://upetd.up.ac.za/thesis/available/etd-10252006-164955.
Full textSingh, Ashki. "The talking cure in the 'tropics'." Thesis, Queen Mary, University of London, 2018. http://qmro.qmul.ac.uk/xmlui/handle/123456789/33941.
Full textDaly, Benjamin. "Avian malaria in the montane tropics." Thesis, University of Oxford, 2013. http://ora.ox.ac.uk/objects/uuid:70284964-36b6-4135-98d4-4ec8d22c8b45.
Full textWylie, Lesley Louise. "Colonial tropes and postcolonial tricks : rewriting the tropics in the novela de la selva." Thesis, University of Cambridge, 2007. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.612756.
Full textChiconela, Domingos Rubão. "Geochemical exploration in tropical terrains with special reference to base metals." Thesis, Rhodes University, 1996. http://hdl.handle.net/10962/d1005565.
Full textMcGarry, Tessa Jane. "Designing marine protected areas in the tropics." Thesis, University of Cambridge, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.615631.
Full textWu, Zhaohua. "Thermally driven surface winds in the tropics /." Thesis, Connect to this title online; UW restricted, 1998. http://hdl.handle.net/1773/10075.
Full textMahone, Sloan. "The psychology of the tropics : conceptions of tropical danger and lunacy in British East Africa." Thesis, University of Oxford, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.432230.
Full textStader, Lulu D. "Breeding behaviour of a tropical bird : a study of the blue-throated Bee-eater (Merops viridis) using a relational database and DNA fingerprinting." Thesis, University of Stirling, 1994. http://hdl.handle.net/1893/11893.
Full textFrederick, Kaycee Loretta. "Anvil characteristics as seen by C-POL during the Tropical Warm Pool International Cloud Experiment (TWP-ICE)." Texas A&M University, 2006. http://hdl.handle.net/1969.1/4850.
Full text黃詩偉 and Sze-wai Wong. "Patterns and behaviors of global tropical cyclones." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2013. http://hdl.handle.net/10722/192994.
Full textpublished_or_final_version
Applied Geosciences
Master
Master of Science
Luizao, Regina C. C. "Soil biological studies in contrasting types of vegetation in central Amazonian rain forests." Thesis, University of Stirling, 1994. http://hdl.handle.net/1893/2274.
Full textHarmanto. "Evaluation net greenhouses for tomato production in tropics." [S.l.] : [s.n.], 2006. http://deposit.ddb.de/cgi-bin/dokserv?idn=979810124.
Full textMerkl, Nicole. "Phytoremediation of petroleum contaminated soils in the tropics." Weikersheim Margraf, 2005. http://deposit.ddb.de/cgi-bin/dokserv?id=2665062&prov=M&dok_var=1&dok_ext=htm.
Full textEdwards, Peter Martin. "Tropospheric oxidation from the Tropics to the Poles." Thesis, University of Leeds, 2011. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.540559.
Full textBuckles, Daniel J. (Daniel James) Carleton University Dissertation Sociology. "Cattle, corn and conflict in the Mexican tropics." Ottawa, 1989.
Find full textMcGlue, Michael Matthew. "LATE QUATERNARY PALEOLIMNOLOGY IN THE SOUTHERN HEMISPHERE TROPICS." Diss., The University of Arizona, 2011. http://hdl.handle.net/10150/204064.
Full textSuzuki-Parker, Asuka. "An assessment of uncertainties and limitations in simulating tropical cyclone climatology and future changes." Diss., Georgia Institute of Technology, 2011. http://hdl.handle.net/1853/41062.
Full textMurphy, Meaghan Thibault. "Biotic and abiotic controls on soil respiration in a biodiversity plantation in the tropics." Thesis, McGill University, 2005. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=97978.
Full textRosencrans, Matthew J. "Variability in global-scale circulations and their impacts on Atlantic tropical cyclone activity." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2006. http://library.nps.navy.mil/uhtbin/hyperion/06Jun%5FRosencrans.pdf.
Full textThesis Advisor(s): Patrick Harr, Tom Murphree. "June 2006." Includes bibliographical references (p.77-79). Also available in print.
張健緯 and Kin-wai Cheung. "Understanding and forecasting interannual variability of tropical cyclone activity in the Western North Pacific Ocean." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1998. http://hub.hku.hk/bib/B31215105.
Full textSaw, Bun Liong. "Infrared and passive microwave satellite rainfall estimate over tropics." Diss., Columbia, Mo. : University of Missouri-Columbia, 2005. http://hdl.handle.net/10355/4267.
Full textThe entire dissertation/thesis text is included in the research.pdf file; the official abstract appears in the short.pdf file (which also appears in the research.pdf); a non-technical general description, or public abstract, appears in the public.pdf file. Title from title screen of research.pdf file viewed on (December 19, 2006) Includes bibliographical references.
Žagar, Nedjeljka. "Dynamical aspects of atmospheric data assimilation in the tropics." Doctoral thesis, Stockholm University, Department of Meteorology, 2004. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-111.
Full textA faithful depiction of the tropical atmosphere requires three-dimensional sets of observations. Despite the increasing amount of observations presently available, these will hardly ever encompass the entire atmosphere and, in addition, observations have errors. Additional (background) information will always be required to complete the picture. Valuable added information comes from the physical laws governing the flow, usually mediated via a numerical weather prediction (NWP) model. These models are, however, never going to be error-free, why a reliable estimate of their errors poses a real challenge since the whole truth will never be within our grasp.
The present thesis addresses the question of improving the analysis procedures for NWP in the tropics. Improvements are sought by addressing the following issues:
- the efficiency of the internal model adjustment,
- the potential of the reliable background-error information, as compared to observations,
- the impact of a new, space-borne line-of-sight wind measurements, and
- the usefulness of multivariate relationships for data assimilation in the tropics.
Most NWP assimilation schemes are effectively univariate near the equator. In this thesis, a multivariate formulation of the variational data assimilation in the tropics has been developed. The proposed background-error model supports the mass-wind coupling based on convectively-coupled equatorial waves. The resulting assimilation model produces balanced analysis increments and hereby increases the efficiency of all types of observations.
Idealized adjustment and multivariate analysis experiments highlight the importance of direct wind measurements in the tropics. In particular, the presented results confirm the superiority of wind observations compared to mass data, in spite of the exact multivariate relationships available from the background information. The internal model adjustment is also more efficient for wind observations than for mass data.
In accordance with these findings, new satellite wind observations are expected to contribute towards the improvement of NWP and climate modeling in the tropics. Although incomplete, the new wind-field information has the potential to reduce uncertainties in the tropical dynamical fields, if used together with the existing satellite mass-field measurements.
The results obtained by applying the new background-error representation to the tropical short-range forecast errors of a state-of-art NWP model suggest that achieving useful tropical multivariate relationships may be feasible within an operational NWP environment.
Mukherji, Arnab. "Agrarian households in semi-arid tropics evaluating policy options /." Santa Monica, CA : RAND, 2007. http://www.rand.org/pubs/rgs_dissertations/RGSD216/.
Full textŽagar, Nedjeljka. "Dynamical aspects of atmospheric data assimilation in the tropics /." Stockholm : Meteorologiska institutionen, Univ, 2004. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-111.
Full textJol, Hamdan Bin. "Saprolite and soil fertility in the humid tropics (Malaysia)." Thesis, Imperial College London, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.309365.
Full textFröhlich, Jane. "Biodiversity of microfungi associated with palms in the tropics." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1997. http://hub.hku.hk/bib/B31236856.
Full textNyarko, George. "Flowering and seed production of cabbage for the tropics." Thesis, Nottingham Trent University, 2007. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.444651.
Full textTsukahara, Yoko. "Evaluation of crossbreeding for goat production in the tropics." Kyoto University, 2011. http://hdl.handle.net/2433/142345.
Full text0048
新制・課程博士
博士(農学)
甲第16147号
農博第1883号
新制||農||991(附属図書館)
学位論文||H23||N4617(農学部図書室)
28726
京都大学大学院農学研究科応用生物科学専攻
(主査)教授 廣岡 博之, 教授 祝前 博明, 教授 松井 徹
学位規則第4条第1項該当
Fröhlich, Jane. "Biodiversity of microfungi associated with palms in the tropics /." Hong Kong : University of Hong Kong, 1997. http://sunzi.lib.hku.hk/hkuto/record.jsp?B19672597.
Full textNewton, Richard. "Vertical profiling in the west Pacific warm pool." Thesis, University of Manchester, 2018. https://www.research.manchester.ac.uk/portal/en/theses/vertical-profiling-in-the-west-pacific-warm-pool(8c89d0ef-dc88-44d6-ad49-81cc34d5e662).html.
Full textKennish, Robin. "Seasonal patterns of algal availability, influences on diet selection and fitness of the tropical crab grapsus albolineatus." Thesis, Hong Kong : University of Hong Kong, 1995. http://sunzi.lib.hku.hk/hkuto/record.jsp?B17591533.
Full textHeaviside, Clare Helen. "Coupling of oceanic and atmospheric heat transport in the tropics." Thesis, Imperial College London, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.508323.
Full textTaylor, James. "The dynamical response to vertical heating structures in the tropics." Thesis, University of Reading, 2014. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.658006.
Full textWu, Zhongxiang. "The influence of SST on air temperature in the tropics." Thesis, Massachusetts Institute of Technology, 1996. http://hdl.handle.net/1721.1/57661.
Full textIncludes bibliographical references (leaves 227-234).
by Zhongxiang Wu.
Ph.D.
Silva, Rodrigo GregÃrio da. "Intensification of milk production in pastures in the humid tropics." Universidade Federal do CearÃ, 2011. http://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=7392.
Full textObjetivou-se com esse trabalho avaliar os efeitos da intensificaÃÃo da produÃÃo de leite, via nÃveis de intensificaÃÃo do sistema, em pastagens de capim-mombaÃa (Panicum maximum Jacq. cv. MombaÃa) no trÃpico Ãmido, durante o perÃodo das Ãguas. Os tratamentos consistiram de quatro nÃveis de intensificaÃÃo, determinados pela combinaÃÃo de nÃveis de adubaÃÃo e nÃvel de produÃÃo dos animais. Foram eles, na sequÃncia crescente de intensificaÃÃo: 1  adubaÃÃo com 400 kg de NÃha-1Ãano-1, com vacas de baixa produÃÃo; 2 adubaÃÃo com 800 kg de NÃha-1Ãano-1, com vacas de baixa produÃÃo; 3 adubaÃÃo com 400 kg de NÃha-1Ãano-1, com vacas de alta produÃÃo; 4 adubaÃÃo com 800 kg de NÃha-1Ãano-1, com vacas de alta produÃÃo. As vacas eram sem raÃas definidas, em mÃdia de terceira cria, com partos ocorridos em outubro/novembro de 2009. No inÃcio das avaliaÃÃes de produÃÃo de leite, encontravam-se com aproximadamente 110 dias de lactaÃÃo. O perÃodo experimental foi de 24 de dezembro de 2009 a 10 de maio de 2010. Para as medidas relacionadas à morfogÃnese e estrutura, foi utilizado o delineamento inteiramente casualizado, com medida repetida no tempo. Quatro tratamentos, com quatro ciclos e quatro repetiÃÃes (piquetes), avaliando a interaÃÃo entre tratamentos e ciclos. Para a avaliaÃÃo do comportamento dos animais, foi utilizado o delineamento inteiramente casualizado, com quatro tratamentos, oito perÃodos e quatro repetiÃÃes (animais), avaliando a interaÃÃo entre tratamentos e perÃodos. Na avaliaÃÃo da distribuiÃÃo de fezes, foi utilizada a anÃlise geoestatÃstica, com quatro tratamentos e trÃs repetiÃÃes (piquetes). Nas anÃlises de produÃÃo dos animais, foi utilizado delineamento inteiramente casualizado simples (placas de fezes, total de fezes, consumo de forragem e consumo total), com medidas repetidas no tempo (escore de condiÃÃo corporal e peso vivo) e com medidas repetidas no tempo, sendo o tempo medida de controle local (produÃÃo de leite por vaca, peso vivo, taxa de lotaÃÃo e produÃÃo de leite por hectare). O perÃodo de descanso utilizado foi o necessÃrio para que fosse possÃvel a expansÃo de 2,5 novas folhas e o resÃduo equivalente ao IAF residual 2,0. O maior fornecimento de nitrogÃnio nÃo proporcionou elevaÃÃo nas variÃveis TAlF, TAlH, TSFant e TSFpost. NÃo foram observadas diferenÃas entre tratamentos em funÃÃo dos tipos de animais. A TAlF segue, em parte, a disponibilidade de Ãgua oriunda da precipitaÃÃo. NÃo houve diferenÃa na TAlH em funÃÃo dos tratamentos. Esse efeito, sendo reflexo do perÃodo de descanso adotado (2,5 novas folhas à perfilho-1), reduziu o nÃvel de interceptaÃÃo da radiaÃÃo fotossinteticamente ativa para valores inferiores a 95%. A intensificaÃÃo apresenta pouco reflexo nas variÃveis estudadas (MSFT, MSFV, MSLV e MSCV). A altura prÃ-pastejo apresentou crescimento do primeiro para o segundo ciclo e posterior declÃnio atà o Ãltimo ciclo, sendo esse o que apresentou os menores valores, para todos os tratamentos. A elevaÃÃo da oferta de nitrogÃnio proporcionou maiores nÃveis de produÃÃo em determinados momentos, quando da oferta de Ãgua em nÃveis adequados. A disponibilidade de Ãgua influenciou a resposta da produÃÃo das pastagens ao longo dos ciclos. Houve relaÃÃo do teor de matÃria orgÃnica do solo e o desempenho produtivo das pastagens. Quanto ao comportamento dos animais, foi observado interaÃÃo entre os tratamentos e os perÃodos do dia, com exceÃÃo do âcomportamento urinandoâ que sà apresentou efeito de perÃodo. A adubaÃÃo influenciou positivamente no âcomportamento pastejandoâ, elevando o tempo gasto na expressÃo do mesmo. Para Outras atividades, o efeito foi negativo, diminuindo o tempo de deslocamento dos animais. A adubaÃÃo e a interaÃÃo a adubaÃÃo à suplemento proporcionaram maior tempo de utilizaÃÃo de sombra pelos animais. A utilizaÃÃo de alimento concentrado elevou o nÃmero de defecaÃÃes, com concentraÃÃo durante os perÃodos de maior permanÃncia no pasto. O perÃodo do dia influenciou o âcomportamento bebendoâ, causando maior consumo de Ãgua nos perÃodos de maiores temperaturas, assim como os tratamentos intermediÃrios apresentaram maiores consumos. No que se refere à distribuiÃÃo de fezes, os dados apresentaram coeficientes de assimetria positiva e de curtose platicÃrtica. Para o coeficiente de variaÃÃo verificou-se uma elevaÃÃo acentuada, com as Ãreas de descanso, apresentando maiores valores e piquetes com maior nÃvel de adubaÃÃo e menores valores. Os fatores climÃticos radiaÃÃo, temperatura e umidade relativa influenciaram significativamente na dispersÃo e localizaÃÃo das fezes. No que se refere ao grau de dependÃncia espacial (GDE), foi verificado classificaÃÃo, variando de moderado a forte. O alcance foi de 14,0 e 12,7 m para as Ãreas de descanso e piquetes, respectivamente. A adubaÃÃo e o fornecimento de concentrado influenciaram a deposiÃÃo e a perda de nitrogÃnio via fezes, elevando seus valores na medida em que se elevou o aporte nutricional. Observou-se heterogeneidade na deposiÃÃo das fezes, ocorrendo zonas de maior concentraÃÃo, como sombra, entrada de piquetes e malhadouro, mostrando picos de deposiÃÃo que chegaram a 1.051,2 kg de N à ha- à ano- e mÃdia variando de 148,8 a 210,7 kg de N à ha- à ano-Â. Houve crescimento das produÃÃes diÃrias e por Ãrea de leite, na medida em que intensificou o sistema. Com a intensificaÃÃo houve maior persistÃncia da lactaÃÃo, observado por meio da relaÃÃo obtida pela divisÃo do coeficiente angular pelo intercepto, resultando em percentual diÃrio de diminuiÃÃo da lactaÃÃo. A persistÃncia da produÃÃo dos animais respondeu diretamente à intensificaÃÃo do sistema, como reflexo da maior intensificaÃÃo (melhoria da dieta). A produÃÃo por Ãrea respondeu mais fortemente ao nÃvel de produÃÃo individual diÃria e segue comportamento quadrÃtico, de acordo com a distribuiÃÃo das chuvas. A produÃÃo fecal cresceu no sentido do maior nÃvel de intensificaÃÃo, resultando em maiores estimativas de consumo. O maior aporte de nutrientes (mais intensivo) possibilitou elevar os nÃveis de produtividade por animal, por Ãrea, em relaÃÃo à mÃo-de-obra e à produÃÃo total diÃria. A maior intensificaÃÃo possibilitou elevar as receitas, todavia elevou os custos totais mensais, apresentando melhor relaÃÃo nos nÃveis intermediÃrios de intensificaÃÃo. Na medida em que se elevou a Ãrea utilizada, o nÃvel menos intensivo apresentou margem bruta positiva. Os custos operacionais efetivos elevaram-se com a intensificaÃÃo dos sistemas. Jà os custos operacionais totais diminuÃram com a intensificaÃÃo, voltando a crescer no nÃvel mais intensivo. A alimentaÃÃo representou por volta de 70% dos custos operacionais efetivos. Os sistemas apresentaram-se inviÃveis no mÃdio-longo prazo, e no curto prazo, foram menos atrativos que o observado na amostra de produtores utilizada nesse estudo.
This study aimed at analyzing the intensification effects via different enhancement levels of the system of milk production in Mombasa grass pastures (Panicum maximum Jacq. cv. MombaÃa) in the humid tropics, during the water period. Treatments consisted of four enhancement levels, determined by combining fertilization levels and production level of the animals. Treatments were in increasing sequence of fertilization, as follow: 1Â Â fertilization with 400 kg of NÃha-1Ãyear-1, with low yield dairy cows; 2ÂÂ fertilization with 800 kg of NÃha-1Ãyear-1, with low yield dairy cows; 3ÂÂ fertilization with 400 kg of NÃha-1Ãyear-1, with high yield dairy cows; 4ÂÂ fertilization with 800 kg of NÃha-1Ãyear-1, with high yield dairy cows. It was used mixed breed cows, on average of third calving, and the births had occurred in October/November 2009. At the beginning of the evaluation of milk production, the cows had around 110 days of lactation. The experiment was conducted between December 24th, 2009 and May 10th, 2010. For the measures related to the morphogenesis and structure, we used a completely randomized design with repeated measurements over time. Four treatments, with four cycles, and four replicates (paddocks) were used to assess the interaction between treatments and cycles. To evaluate the behavior of the animals, we used a completely randomized design, with four treatments, eight periods and four replicates (animals) to evaluate the interaction between treatments and periods. In the evaluation of the distribution of feces, a geostatistical analysis was applied, with four treatments and three replicates (paddocks). In the analysis of animal production, a simple completely randomized design (feces patches, total feces, forage intake and total consumption), with repeated measures over time (body condition score and live weight) and with repeated measures over time; the time considered the measure of local control (milk yield per cow, live weight, stocking rate, and milk production per hectare). The rest period was the necessary to enable the expansion of 2.5 new leaves and the residue equivalent to the residual leaf area index 2.0 (residual LAI 2.0). The greater supply of nitrogen has not provided increase in the following variables: leaf elongation rate (TAlF), stem elongation rate (TAlH), anterior leaf senescence rate (TSFant) and posterior leaf senescence rate (TSFpost). There was no difference among treatments as a function of the type of animals. The TAlF partly had followed the availability of water from the rainfall. It was observed a variation in the organic matter content throughout the area, reflected in the ability to store water and nutrients, which influenced their availability to the pastures. No difference was detected in TAlH in function of treatments. This effect was a result of the rest period adopted (2.5 new leavesÃtiller-1), reducing the capture level of photosynthetically active radiation to values below 95%. The intensification has little consequence on studied variables (total forage dry mass, green forage dry mass, green leaf blade dry mass, and green stem dry mass). The pre-grazing height presented growth from the first to the second cycle and a subsequent decline until the last cycle, considering that this had the lowest values for all treatments. The increase in nitrogen availability promoted higher yield levels at certain moments, when water was supplied at suitable levels. Water availability influenced the yield response of pasture over the cycles. A relationship was verified between the soil organic matter content and yield performance of pastures. Regarding the animals behavior, it was registered interaction between treatments and day periods, except for urinating behavior that was only affected by the period. The fertilization had positive influence on the grazing behavior, increasing the time spent to expressing it. For the other activities the effect was negative, reducing the displacement time of animals. The fertilization and the interaction fertilization x supplement provided a longer use of shading by the animals. The use of concentrate feed increased the number of defecations, especially during the periods of longer permanence in the pasture. Day period influenced the drinking behavior, leading to a higher consumption of water in the periods with higher temperatures, as well as intermediate treatments presented higher consumption. In relation to the feces distribution, the data had coefficients of positive skewness and platicÃrtica kurtosis. For the coefficient of variation, we verified a great variation, with the rest areas presenting higher values, and paddocks with higher fertilization level presenting the lowest values. Climatic factors radiation, temperature and relative humidity have significantly influenced the dispersal and location of the feces. Regarding the degree of spatial dependence (GDE) it was verified classification ranging from moderate to strong, with higher proportion of GDE. The range was between 14.0 and 12.7m for rest areas and paddocks, respectively. The fertilization and supply of concentrate influenced the deposition and loss of nitrogen via feces, increasing its values to the extent that it increased the nutrient input. We observed heterogeneity in deposition of feces, with areas of higher concentration, as shadow, entrance of paddocks, and rest area, presenting peaks of deposition reaching 1,051.2kg NÃha-ÂÃyear-Â, and average varying between 148.8 and 210.7 NÃha-ÂÃyear-Â. There was increase in milk daily production and per area, as it intensified the system, via enhancement. With the intensification there was a greater persistence of lactation, observed through the relationship obtained by dividing the slope per intercept, resulting in a daily percentage of decrease in lactations. The persistence of animalsâ production responded directly to the system intensification, as a consequence of higher enhancement (improved diet). The production per area responded more strongly to the level of individual daily production and followed a quadratic trend, accompanying the rainfall distribution. The fecal production increased towards the highest level of enhancement, resulting in higher estimates of consumption. The greater input of nutrients (more intensive) allowed elevating the productivity levels per animal, per area, in relation to the labor and total daily production. The increase in area used for production improves the investment/production ratio, decreasing as enlarges the area. The greater enhancement enabled raising the revenues, but also raised the total monthly costs, presenting better relationship the intermediate levels of enhancement. To the extent that it has increased the area used, the lowest intensive level had a positive gross margin. The actual operating costs increased as the systems had been intensified. But the total operating costs decreased with the intensification, increasing again at the most intensive level. The feed represented around 70% of actual operating costs. Systems were unfeasible at medium-long terms, and at short term they were less attractive than observed in the sample of producers used in this study.
Filippaki, Argyro. "Tropics of trauma : affective representations in war narratives, 1917-2006." Thesis, University of Glasgow, 2017. http://theses.gla.ac.uk/7941/.
Full textBeucler, Tom(Tom George). "Interaction between water vapor, radiation and convection in the tropics." Thesis, Massachusetts Institute of Technology, 2019. https://hdl.handle.net/1721.1/121758.
Full textCataloged from PDF version of thesis.
Includes bibliographical references (pages 227-251).
The spatiotemporal variability of water vapor near the Equator remains poorly understood because convective organization simultaneously spans the cloud scale (~ 10km) and the planetary scale (~ 10, 000km). Spatiotemporal variability of tropical water vapor may result from internal instabilities of the atmosphere, arising from the interaction between water vapor, radiation and convection. The present work leverages the instability of radiative-convective equilibrium, the most fundamental state of the tropical atmosphere, to connect convective organization in cloud-permitting models with the observed variability of water vapor through common physical mechanisms. First, we propose a simple theory that explains when instability of radiative-convective equilibrium may occur: If the total atmospheric cooling decreases with column water vapor, then radiative-convective equilibrium may be unstable to the growth of moist and dry perturbations.
Secondly, we combine a linear response framework with the weak temperature gradient approximation to analyze the interaction between convection, radiation and water vapor at each level of the atmosphere. We find that convection may interact with radiation to trigger the growth of mid-tropospheric water vapor anomalies by transporting water vapor to the upper troposphere, where it can prevent lower-tropospheric water vapor from radiatively cooling to space. Thirdly, we turn to the spatial organization of water vapor anomalies and relate the evolution of the size of moist and dry regions to diabatic fluxes in twenty cloud-permitting simulations on large domains. Longwave radiation from ice clouds aggregates convection at larger scales, shortwave radiation aggregates convection at smaller scales, and surface enthalpy fluxes smooth out water vapor anomalies through their enthalpy disequilibrium component.
Finally, we relate the transient zonal variability of precipitable water to convective-aggregation mechanisms in realistic models and observations of the atmosphere. Radiative fluxes generate transient water vapor structures of planetary scales, while surface enthalpy fluxes and horizontal energy transport act to smooth out these structures, suggesting parallels between observations and idealized simulations of aggregated convection.
by Tom Beucler.
Ph. D.
Ph.D. Massachusetts Institute of Technology, Department of Earth, Atmospheric, and Planetary Sciences
Stanley, James. "Groundwater chemistry and microbiology in a wet-tropics agricultural catchment." Thesis, Queensland University of Technology, 2019. https://eprints.qut.edu.au/134265/1/James_Stanley_Thesis.pdf.
Full textFichtler, Esther, Gerhard Helle, and Martin Worbes. "Stable-Carbon Isotope Time Series From Tropical Tree Rings Indicate A Precipitation Signal." Tree-Ring Society, 2010. http://hdl.handle.net/10150/622616.
Full textWebb, David. "A geography of small-scale capture fishing and aquaculture in Limbon-Limbon and Pipindan, two fishing villages on Laguna de Bay, Philippines." Thesis, University of Cambridge, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.240070.
Full textHassler, Björn. "The large-scale stratospheric circulation in the Tropics : understanding the effect of gyroscopic pumping on the tropical meridional circulation." Thesis, University of Cambridge, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.619781.
Full textHendrix, Cullen Stevenson. "Leviathan in the Tropics? environment, state capacity, and civil conflict in the developing world /." Diss., Connect to a 24 p. preview or request complete full text in PDF format. Access restricted to UC campuses, 2008. http://wwwlib.umi.com/cr/ucsd/fullcit?p3307529.
Full textTitle from first page of PDF file (viewed July 22, 2008). Available via ProQuest Digital Dissertations. Vita. Includes bibliographical references (p. 203-220).
Amogne, Firew Tegegne. "Evaluation of alternative feed resources for ruminants under arid zones of the tropics and sub-tropics: the case of cactus pear (Opuntia ficus-indica) in Ethiopia /." Berlin : Köster, 2007. http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&doc_number=015824295&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA.
Full textForselius, Ellen. "The Good, The Bad and The Seascape : Possible Effects of Climate Change in Tropical People and Ecosystems in the Western Indian Ocean Using a Gender Perspective." Thesis, Stockholms universitet, Institutionen för naturgeografi och kvartärgeologi (INK), 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-96064.
Full textCampana, Mariana. "Potencial de resposta ao nitrogênio em pastos manejados intensivamente." Universidade de São Paulo, 2017. http://www.teses.usp.br/teses/disponiveis/74/74131/tde-21092017-095040/.
Full textNitrogen fertilization is a strategy used to improve the production and bromatological composition of forages. In intensively managed pastures the continuous use of fertilizers creates specific conditions in the system where the plant can change its responsiveness to nitrogen. Thus, the objective of this work was to verify the nitrogen response curve of intensively managed pastures and to measure the mineralizable organic N fraction through the Illinois Soil Nitrogen Test (ISNT) as a possible predictor of the fertilization response. Five pasture areas of the genus Megathyrsus syn Panicum were selected with different times of intensive management. In each area an N response curve experiment was implemented using the nutrient source the ammonium nitrate fertilizer at doses of 0, 50, 100 and 200 kg ha-1 of N cut-1 of the forage. The period of growth between the collections was of 28 days, being realized 3 samplings of the part of the pasture. Soil samples were collected in pre and post treatment. The ISNT levels found in pretreatment were higher than those normally reported for other crops in the tropics. The areas with the greatest intensification time presented NPH levels> 291 mg kg-1. Dry mass, N content, SPAD index and NDVI index increased with higher N doses. Areas with higher intensification times had a reduction in dry mass production when the highest nitrogen fertilizer dose was used. Crude protein levels varied from 15-22% and are well above those found in the literature for pastures of the genus Megathyrsus syn Panicum. Nitrogen use efficiency indexes were low, characterizing soil nitrogen dependence for these pasture management scenarios. Among the evaluated areas there was no absence of response to nitrogen fertilization. The ISNT and mineral N present in the soil were inversely related to the productive response of the pastures. This study shows the potential of using soil nitrogen rates to manage the nitrogen fertilization of intensive pastures.
Kirkman, Grant A. "The surface exchange of trace gases in the tropics and savannas." [S.l.] : [s.n.], 2001. http://ArchiMeD.uni-mainz.de/pub/2001/0085/diss.pdf.
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