Dissertations / Theses on the topic 'Wind direction'
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Claus, Jean M. "Wind direction effects on urban flows." Thesis, University of Southampton, 2011. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.560582.
Full textNielsen, Emil. "Real-time Wind Direction Filtering for Sailboat Race Tracking." Thesis, Linköpings universitet, Medie- och Informationsteknik, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-119976.
Full text彭運佳 and Wan-kai Pang. "Time series analysis of meteorological data: wind speed and direction." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1993. http://hub.hku.hk/bib/B30425979.
Full textPang, Wan-kai. "Time series analysis of meteorological data : wind speed and direction /." [Hong Kong] : University of Hong Kong, 1993. http://sunzi.lib.hku.hk/hkuto/record.jsp?B13456933.
Full textAbohela, Islam Mohamed Mahmoud Mohamed. "Effect of roof shape, wind direction, building height and urban configuration on the energy yield and positioning of roof mounted wind turbines." Thesis, University of Newcastle Upon Tyne, 2012. http://hdl.handle.net/10443/1686.
Full textMölders, Nicole. "On the influence of the geostrophic wind direction on the atmospheric response to landuse changes." Universitätsbibliothek Leipzig, 2016. http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-213350.
Full textUm zu untersuchen, ob die atmosphärische Antwort auf Landnutzungsänderungen sensitiv zur Richtung des geostrophischen Windes ist, wurden Simulationen durchgeführt, bei denen alternativ eine Landschaft mit und ohne Urbanisierung plus Tagebauten angenommen wurde. Die Simulationsergebnisse zeigen, daß - außer für Wolken- und Niederschlagspartikel - die täglichen Gebietsmittelwerte der Zustandsvariablen sich kaum für die beiden Landschaften unterscheiden. Trotzdem kann das lokale Wetter merklich über und im Lee der Oberflächen mit veränderter Landnutzung beeinflußt werden. Die signifikanten Differenzen in den Wolken- und Niederschlagspartikeln sind jedoch nicht an die unmittelbare Nähe der Landnutzungsänderungen gebunden. Generell treten die signifikanten Unterschiede bei den Wolkenund Niederschlagspartikeln, der Bodenfeuchte und der Vertikalkomponente des Windvektors auf. Letztere beeinflussen stark die Wolken- und Niederschlagsbildung durch die Wechselwirkung Wolkenmikrophysik-Dynamik. Die Ergebnisse zeigen außerdem, daß lokal der Grad der atmosphärischen Reaktion für die meisten Größen bei unterschiedlicher Richtung des geostrophischen Windes anders ausfällt. Die Differenzen der Gebietsmittelwerte der 24h-akkumulierten Evapotranspiration gleichen sich jedoch für alle Richtungen des geostrophischen Windes
Hibbert, Michael Patrick. "The development of a solid state wind velocity and direction indicator, suitable for data logging." Thesis, Cape Technikon, 1992. http://hdl.handle.net/20.500.11838/1117.
Full textThis thesis describes the development of a free standing, maintenance free anemometer which has no rotating parts. The principle of operation is based on the \-vind drag/force around a hollow P.V.c. pipe. The aim is to demonstrate how the strain occurring in the P.V.C. pipe, due to wind drag/force acting on it, can generate an electrical signal which can be mathematically manipulated to determine wind velocity and wind bearing.
Mölders, Nicole. "On the influence of the geostrophic wind direction on the atmospheric response to landuse changes." Universität Leipzig, 1998. https://ul.qucosa.de/id/qucosa%3A15076.
Full textUm zu untersuchen, ob die atmosphärische Antwort auf Landnutzungsänderungen sensitiv zur Richtung des geostrophischen Windes ist, wurden Simulationen durchgeführt, bei denen alternativ eine Landschaft mit und ohne Urbanisierung plus Tagebauten angenommen wurde. Die Simulationsergebnisse zeigen, daß - außer für Wolken- und Niederschlagspartikel - die täglichen Gebietsmittelwerte der Zustandsvariablen sich kaum für die beiden Landschaften unterscheiden. Trotzdem kann das lokale Wetter merklich über und im Lee der Oberflächen mit veränderter Landnutzung beeinflußt werden. Die signifikanten Differenzen in den Wolken- und Niederschlagspartikeln sind jedoch nicht an die unmittelbare Nähe der Landnutzungsänderungen gebunden. Generell treten die signifikanten Unterschiede bei den Wolkenund Niederschlagspartikeln, der Bodenfeuchte und der Vertikalkomponente des Windvektors auf. Letztere beeinflussen stark die Wolken- und Niederschlagsbildung durch die Wechselwirkung Wolkenmikrophysik-Dynamik. Die Ergebnisse zeigen außerdem, daß lokal der Grad der atmosphärischen Reaktion für die meisten Größen bei unterschiedlicher Richtung des geostrophischen Windes anders ausfällt. Die Differenzen der Gebietsmittelwerte der 24h-akkumulierten Evapotranspiration gleichen sich jedoch für alle Richtungen des geostrophischen Windes.
Schachterle, Gregory Dallin. "Improved Analysis Techniques for Scatterometer Wind Estimation." BYU ScholarsArchive, 2020. https://scholarsarchive.byu.edu/etd/9218.
Full textKunkee, David Bryan. "Polarimetric millimeter-wave thermal emission from anisotropic water surfaces : application to remote sensing of ocean surface wind direction." Diss., Georgia Institute of Technology, 1995. http://hdl.handle.net/1853/14689.
Full textLeishman, Natalie. "Model Sensitivity, Performance and Evaluation Techniques for The Air Pollution Model in Southeast Queensland." Thesis, Queensland University of Technology, 2005. https://eprints.qut.edu.au/16148/1/Natalie_Leishman.pdf.
Full textLeishman, Natalie. "Model Sensitivity, Performance and Evaluation Techniques for The Air Pollution Model in Southeast Queensland." Queensland University of Technology, 2005. http://eprints.qut.edu.au/16148/.
Full textJohnson, M. E., and n/a. "The application of statistics to the mesoscale study of wind speed and direction in the Canberra region." University of Canberra. Information Sciences, 1986. http://erl.canberra.edu.au./public/adt-AUC20060802.154807.
Full textViertel, René, Michael Wilsdorf, and Armin Raabe. "Ein Bewertungsverfahren für Schallimmissionen unter Einbeziehung des Atmosphärenzustandes." Universitätsbibliothek Leipzig, 2017. http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-223227.
Full textA procedure is described, which has been developed within the framework of a project for the Bundeswehr. This method provides a relatively simple way to include meteorological influences on the sound propagation for forecasting sound immission. Therefore, at first, different meteorological situations (differentiation regarding temperature, wind speed, wind direction) have been classified. For the different classes the spatial distribution attenuation of sound level have been calculated using a model of sound propagation SMART (Sound propagation model of the atmosphere using ray-tracing). The results are stored in a database. The analysis and evaluation of this forecasts as well as the access to the database is realized using the visualization tool MetaVIS (Meteorological attenuation visualization). Therewith fast forecasts of sound immission for present meteorological situations are enabled. Moreover, with this procedure a regionalization of an entire territory in areas with a similar sound climatology is possible. Such an estimation has been done by analysing maps of sound level attenuation for different atmospheric structures. As a result, a map for restructuring the consulting areas of the Bundeswehr, considering meteorological influences on the sound propagation, could be acquired
Leite, Gladeston da Costa. "AnÃlise de campos de ventos oceÃnicos em imagens SAR." Universidade Federal do CearÃ, 2011. http://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=7498.
Full textEsta tese introduz uma nova metodologia para determinar a direÃÃo do vento sobre a superfÃcie dos oceanos utilizando tÃcnicas de processamento das imagens de Radar de Abertura SintÃtica (SAR, do inglÃs Synthetic Aperture Radar). A literatura relacionada demonstra um crescente interesse no processamento dessas imagens para detecÃÃo de alvos, classificaÃÃo de regiÃes, extraÃÃo de campos de ventos, monitoramento de derrames de Ãleo, aplicaÃÃes geofÃsicas e meteorolÃgicas. A extraÃÃo de campos de ventos em imagens SAR à uma tarefa desafiadora devido à contaminaÃÃo das mesmas por um ruÃdo oriundo do sistema de aquisiÃÃo, denominado speckle, que dificulta tarefas de processamento e interpretaÃÃo das mesmas. Portanto, esta tese propÃe metodologias de extraÃÃo da direÃÃo do vento por transformada de Fourier, transformadas wavelets e mÃtodos baseados em textura. As transformadas wavelets utilizadas para esta tarefa sÃo Gabor, ChapÃu Mexicano e o algoritmo à trous. Com relaÃÃo à anÃlise de textura utilizada, esta se baseia na informaÃÃo espacial da matriz de co-ocorrÃncia dos nÃveis de cinza para estimar a direÃÃo de padrÃes lineares em imagens contaminadas com speckle. Os experimentos foram realizados em imagens de textura sintÃticas, imagens do Ãlbum de Brodatz e imagens SAR sintÃticas e reais. Foi observado que os mÃtodos propostos foram capazes de estimar direÃÃes de padrÃes lineares e extrair campos de streaks de vento visÃveis em imagens SAR reais. As principais contribuiÃÃes desta tese sÃo: o mÃtodo proposto para estimaÃÃo de direÃÃo de ventos na superfÃcie do oceano e a extensÃo de tÃcnica jà existente na literatura, possibilitando assim a estimaÃÃo da velocidade dos ventos na faixa de 4 a 10 m/s. Os melhores resultados obtidos nesta tese foram alcanÃados utilizando o mÃtodo proposto que combina transformada wavelet e anÃlise de textura.
This thesis introduces a new methodology to determine the wind direction over the ocean surface using image processing techniques on SAR (Synthetic Aperture Radar) images. Related literature demonstrates a growing interest in processing these images for target detection, region classification, wind field extraction, oil spill monitoring, geophysical and meteorological applications. Wind field extraction in SAR images is a challenging task due to contamination acquisition system by speckle noise, which makes difficult processing and interpretation tasks. Thus, this thesis proposes methods for wind direction estimation by applying image transforms, such as Fourier and wavelets and furthermore texture-based methods. The wavelet transforms used for this task are Gabor, Mexican Hat and the à trous algorithm. Concerning the texture approach, it is based on the co-occurrence matrix to estimate direction of linear patterns in speckled images. The experiments were performed on synthetic texture, Brodatz album, synthetic and real SAR images. It was observed that the proposed methods were able to estimate directions of linear patterns and extract wind fields from visible wind-induced streaks on SAR images. The main contributions of this thesis are: to propose methods for wind direction estimation on the ocean surface and to extend existing techniques in the literature in order to provide wind vector estimation in the range of 4 to 10 m/s. The best results of this tese were achieved with the proposed method that combines wavelet transform and texture analysis.
Viertel, René, Michael Wilsdorf, and Armin Raabe. "Ein Bewertungsverfahren für Schallimmissionen unter Einbeziehung des Atmosphärenzustandes." Universität Leipzig, 2007. https://ul.qucosa.de/id/qucosa%3A15573.
Full textA procedure is described, which has been developed within the framework of a project for the Bundeswehr. This method provides a relatively simple way to include meteorological influences on the sound propagation for forecasting sound immission. Therefore, at first, different meteorological situations (differentiation regarding temperature, wind speed, wind direction) have been classified. For the different classes the spatial distribution attenuation of sound level have been calculated using a model of sound propagation SMART (Sound propagation model of the atmosphere using ray-tracing). The results are stored in a database. The analysis and evaluation of this forecasts as well as the access to the database is realized using the visualization tool MetaVIS (Meteorological attenuation visualization). Therewith fast forecasts of sound immission for present meteorological situations are enabled. Moreover, with this procedure a regionalization of an entire territory in areas with a similar sound climatology is possible. Such an estimation has been done by analysing maps of sound level attenuation for different atmospheric structures. As a result, a map for restructuring the consulting areas of the Bundeswehr, considering meteorological influences on the sound propagation, could be acquired.
Wang, Weili. "Remote sensing of swell and currents in coastal zone by HF radar." Thesis, Toulon, 2015. http://www.theses.fr/2015TOUL0011/document.
Full textNearshore marine environment contains many complex processes, but the lack of high-resolution data over a large area during a long time is often the primary obstacle to further research. High-frequency (HF) radar is a mean of remote sensing which obtains continuous near-real time sea surface information over a large area. Thus the study of inversion of marine parameters from HF radar data is very meaningful. Thisthesis makes use of a 13-month-long dataset collected by two phased array HF radar to investigate the characteristics of the sea echo signals, study the data processing and inversion methods, compute sea surface parameters and evaluate the accuracy of radarinversion of swell parameters.The thesis refers to the ground wave HF radar, whose radio waves interact with ocean by Bragg resonance scattering. The development history and applications of HF radar is introduced. The basic theory of electromagnetic wave is reviewed. The principles of inversion of sea surface current, wind direction and swell parameters are described. The feasibility of the swell parameter inversion is investigated. Based on theoretical analysis and statistical studies of a large number of samples, the thesis proposes a series of methods on raw signal processing and quality control, including the determination of the noise level, data averaging in space and time, the proper identification of spectral peaks, the peak width threshold, etc. Respecting the characteristics of different physical processes, inversions of current and wind use spectra collected every 20 min; inversion of swell parameters uses one-hour averaged spectra. The statistics of qualified spectra for swell parameter calculations are presented for both stations. A set of efficient, with a reduced computational cost, automatic computing programs are developed to do the processing and derive marine parameters. Radial current velocities are derived from single radar station. Current vector fields are obtained by combination of both stations. One-year mean flow field in the Iroise Sea is shown, together with the computation of vorticity and divergence. A one-month SeaSonde radar dataset off Qingdao is studied. One-month mean flow pattern together with vorticity and divergence are presented.Relative wind direction with respect to radar look direction is measured through ratio of Bragg peaks amplitudes. Different empirical models are employed to derive radar-inverted relative wind direction. Results show reasonable agreement with model estimations. Different directional distribution models are used to measure the spreading factor for the Iroise Sea. The thesis focuses on the study of swell parameters. Results are validated by buoy and wave model (WAVEWATCH III) data. The assessments show that the accuracy of swell frequency is very good, the accuracy of swell significant waveheight is reasonable, and the accuracy of relative swell direction is low.Consistency of measurements by both radar stations is verified by comparison between the two. This also supports the use of double samples to do the inversion. Use of two radars not only further improves the accuracy but also solves the ambiguity of relative swell direction from single station and gives the absolute wave direction to a certain precision. The thesis proposes a constant relative directionmethod to derive swell significant waveheight, based on the studies of radar integral equation and the inverted results of relative swell direction. This proposal is demonstrated to improve the agreement of radar inversion and buoy/model provided significant waveheight and increases significantly the number of samples. The thesis investigates the accuracy of swell parameters obtained by HF radar. Contributions of random errors in radar observations are quantified. Comparing the differences between radar and buoy/model estimations gives assessments of the contribution of radar intrinsic uncertainty and contribution of other factors
Chesley-Preston, Tara Lea. "Patterns of natural avalanche activity associated with new snow water equivalance and upper atmospheric wind direction and speed in the mountains surrounding Gothic, Colorado." Thesis, Montana State University, 2010. http://etd.lib.montana.edu/etd/2010/chesley-preston/Chesley-PrestonT0510.pdf.
Full textPark, Jeonghwan. "Investigations of GNSS-R for Ocean Wind, Sea Surface Height, and Land Surface Remote Sensing." The Ohio State University, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=osu1512095954817037.
Full textDrbohlav, Lukáš. "Vyhodnocení spotřeby osobní lodi." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2012. http://www.nusl.cz/ntk/nusl-219883.
Full textHelmersson, Irene. "Uppskattning av vindklimat : – Implementering och utvärdering även metod för normalårskorrektion." Thesis, Uppsala universitet, Luft-, vatten och landskapslära, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-303977.
Full textEn vindturbin har en planerad livslängd på 20-25 år (Wizelius, 2007). Vid planering av en vindkraftspark behöver en estimering av medelvinden och energiutvinningen utföras för platsen man är intresserad av. På grund av stora fluktuationer av vindhastighet från år till år är det ur klimatologisk synpunkt inte tillräckligt att mäta under en kort period, exempelvis ett år. Det år man mäter kan ha ovanligt starka eller ovanligt svaga vindar och ge en icke representativ bild av vindklimatet på platsen. Samtidigt är det inte praktiskt eller ekonomiskt önskvärt att mäta under en längre tidsperiod. Istället kan den korta mätserie som insamlats korrigeras till ett normalår med hjälp av en långtidsreferens innan den används för att beräkna energiinnehållet. I princip går normalårskorrigering ut på att relatera den korta mätserien till en eller flera variabler i långtidsreferensen. Som långtidsreferensdata kan den geostrofiska vinden på platsen eller en lång mätserie från en närliggande plats användas. Om korrelationen mellan de två serierna är tillräckligt hög kan en normalårskorrigering göras med hjälp av relationen. Tidigare har man vid normalårskorrigering främst sett till relationen mellan vindhastigheterna för den uppmätta vinden och en referensvind. Syftet i detta arbete är att utvärdera en del av en algoritm för normalårskorrigering där hänsyn tas till fler variabler än endast vindhastighet. Samband som studeras är mellan uppmätt vindhastighet och geostrofisk vindhastighet, geostrofisk vindriktning och tid på året. För utvärderingen av algoritmen har två vinddataserier från Näsudden på Gotland använts för en period av 15 år med uppmätt vind på 75m och geostrofisk vind på 850hPa. Där den geostrofiska vinden fått representera långtidsreferensen och den uppmätta vinden för ett år i taget har relaterats till denna. Efter normalårskorrigeringen har den uppmätta vinden för 15 år fått representera vindklimatet på platsen som jämförelse. Enligt algoritmen har uppskattning av vindklimatet på Näsudden skapats i tre steg. Steg 1 är en uppskattning av vinden från sambandet för geostrofisk vindhastighet. Steg 2 är en korrektion av uppskattningen genom sambandet till geostrofisk vindriktning och steg 3 en korrektion av uppskattningen genom sambandet till tid på året. Efter vart steg skickas det aktuella estimatet vidare till nästa steg där det korrigeras med avseende på nästa samband. Slutsatserna från undersökningen visade att med den metod som använts ger normalårskorrigeringen med enbart sambandet till hastighet bäst uppskattning av den klimatologiska medelvinden. Standardavvikelsen för estimatet ger 5 % risk för mer än 0,436 m/s fel vid uppskattning av klimatologisk medelvind vilket är jämförbart med tidigare studier. Vidare överskattar införandet av vindriktningsberoendet den uppskattade medelvindhastigheten samt ökar osäkerheten. Även införandet av säsongsberoendet överskattar medelvindhastigheten ytterligare samt även osäkerheten.
Suzuki, Takeharu, and n/a. "Integrated, Intelligent Sensor Fabrication Strategies for Environmental Monitoring." Griffith University. School of Microelectronic Engineering, 2004. http://www4.gu.edu.au:8080/adt-root/public/adt-QGU20040813.131206.
Full textBeneděla, Pavel. "Meteostanice." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2013. http://www.nusl.cz/ntk/nusl-220133.
Full textSuzuki, Takeharu. "Integrated, Intelligent Sensor Fabrication Strategies for Environmental Monitoring." Thesis, Griffith University, 2004. http://hdl.handle.net/10072/367295.
Full textThesis (PhD Doctorate)
Doctor of Philosophy (PhD)
School of Microelectronic Engineering
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Caixeta, Daniel Ferreira. "Dispersão de machos de Diatraea saccharalis (Fabricius) (Leipdoptera: Crambidae) em cana-de-açúcar /." Jaboticabal : [s.n.], 2010. http://hdl.handle.net/11449/91389.
Full textBanca: José Alexandre Freitas Barrigossi
Banca: Leila Lucci Dinardo-Miranda
Resumo: A broca-da-cana, Diatraea saccharalis (Fabr.), é a uma das pragas mais importantes da cana-de-açúcar no Brasil. Para o sucesso na utilização de plantas geneticamente modificadas visando o controle deste inseto, faz-se necessário conhecer sua dispersão. Estudos da dinâmica de vôo também podem ajudar na compreensão do comportamento do inseto, e de suas interações ecológicas. O estudo da dispersão de D. saccharalis foi possível através da marcação, liberação e captura dos machos adultos. A marcação foi realizada por meio da incorporação de corante lipossolúvel à dieta das larvas. As armadilhas de feromônio foram dispostas nos talhões de cana-de-açúcar nos sentidos norte, sul, leste e oeste, circundando o ponto de liberação. Os resultados obtidos mostram que mais de 45 % dos machos marcados capturados permaneceram nas áreas mais próximas ao ponto de liberação. Fatores climáticos como a temperatura, umidade relativa, velocidade do vento e precipitação não interferem decisivamente na captura dos machos liberados e dos machos do campo. A direção do vento exerce um papel fundamental na dispersão de D. saccharalis, uma vez que a maioria dos insetos voou a favor do vento. O modelo mais adequado para explicar a relação entre a distância de vôo e o número de indivíduos capturados é dado por y = a2/(1+(2a1,8bx))2,6. Com isso, para o manejo de resistência de D. saccharalis em cultivos de cana-de-açúcar geneticamente modificada expressando proteínas de Bacillus thuringiensis Berliner, deve se manter no máximo 800 m de distância entre as áreas de refúgio
Abstract: The sugarcane borer, Diatraea saccharalis (Fabr.), is one of the most important sugarcane pests in Brazil. For a successful utilization of genetically modified crops aiming at the control of this insect, it is necessary to know its dispersal. Studies of flight dynamics can also help understand the insect's behavior and its ecological interactions. The study of D. saccharalis dispersal was possible through labeling, releasing and capturing adult males. Labeling was performed by incorporating oil soluble dyes into the larval diet. The pheromone traps were placed in a sugarcane field following the cardinal directions (North, South, East, West) around the release site. The results showed that more than 45 % of the labeled males were captured closer to the release site. Climatic factors such as temperature, relative humidity, wind speed and rain do not affect decisively in the release or wild males capture. The wind direction is important in D. saccharalis dispersal, once the majority of insects flew towards the wind. The most adequate model to explain the relationship between flight distance and number of captured insects is y = a2/(1+(2a1,8bx))2,6. Thus, for resistance management of D. saccharalis in genetically modified sugarcane expressing Bacillus thuringiensis Berliner proteins, the refugia sites should be kept at most 800 m apart
Mestre
Silva, Juliane Kayse Albuquerque da. "Caracterização do vento e estimativa do potencial eólico para a região de tabuleiros costeiros (Pilar, Alagoas)." Universidade Federal de Alagoas, 2007. http://repositorio.ufal.br/handle/riufal/859.
Full textCoordenação de Aperfeiçoamento de Pessoal de Nível Superior
Este trabalho teve como objetivo a caracterização do comportamento do vento (velocidade, direção, índice de turbulência e fator de rajadas), bem como fazer uma estimativa preliminar do potencial eólico para a região de tabuleiros costeiros próximo a Maceió. Foram utilizados os dados de vento coletados durante a realização do projeto MICROMA (Micrometeorologia da Mata Atlântica Alagoana) montado na Fazenda Vilanova, Pilar AL (9º36 12 S, 35º53 46 W, 170 m), no período de julho de 1996 a setembro de 1999. Os resultados mostraram que o vento no local é influenciado pelos fenômenos locais e os de grande escala. A velocidade (8,29 m) diminui no inverno e aumenta no verão, e, em ambas as estações, é bem maior durante o dia. Quase metade (46%) dos casos são ventos na faixa de zero até 2,0 m.s-1. A direção apresenta pouca variabilidade e o fluxo predominante é no sentindo oceano-continente (66%). A turbulência atmosférica é inversamente proporcional a velocidade do vento. O vento estimado para 75m em 99,5% dos casos foi superior a velocidade de partida dos aerogeradores (2,5 m.s-1). O valor médio estimado para o potencial eólico foi de 110,27±106,51 W.m-2 com maior ocorrência na faixa entre 50-100 W.m-2 (38,6%).
Caixeta, Daniel Ferreira [UNESP]. "Dispersão de machos de Diatraea saccharalis (Fabricius) (Leipdoptera: Crambidae) em cana-de-açúcar." Universidade Estadual Paulista (UNESP), 2010. http://hdl.handle.net/11449/91389.
Full textA broca-da-cana, Diatraea saccharalis (Fabr.), é a uma das pragas mais importantes da cana-de-açúcar no Brasil. Para o sucesso na utilização de plantas geneticamente modificadas visando o controle deste inseto, faz-se necessário conhecer sua dispersão. Estudos da dinâmica de vôo também podem ajudar na compreensão do comportamento do inseto, e de suas interações ecológicas. O estudo da dispersão de D. saccharalis foi possível através da marcação, liberação e captura dos machos adultos. A marcação foi realizada por meio da incorporação de corante lipossolúvel à dieta das larvas. As armadilhas de feromônio foram dispostas nos talhões de cana-de-açúcar nos sentidos norte, sul, leste e oeste, circundando o ponto de liberação. Os resultados obtidos mostram que mais de 45 % dos machos marcados capturados permaneceram nas áreas mais próximas ao ponto de liberação. Fatores climáticos como a temperatura, umidade relativa, velocidade do vento e precipitação não interferem decisivamente na captura dos machos liberados e dos machos do campo. A direção do vento exerce um papel fundamental na dispersão de D. saccharalis, uma vez que a maioria dos insetos voou a favor do vento. O modelo mais adequado para explicar a relação entre a distância de vôo e o número de indivíduos capturados é dado por y = a2/(1+(2a1,8bx))2,6. Com isso, para o manejo de resistência de D. saccharalis em cultivos de cana-de-açúcar geneticamente modificada expressando proteínas de Bacillus thuringiensis Berliner, deve se manter no máximo 800 m de distância entre as áreas de refúgio
The sugarcane borer, Diatraea saccharalis (Fabr.), is one of the most important sugarcane pests in Brazil. For a successful utilization of genetically modified crops aiming at the control of this insect, it is necessary to know its dispersal. Studies of flight dynamics can also help understand the insect’s behavior and its ecological interactions. The study of D. saccharalis dispersal was possible through labeling, releasing and capturing adult males. Labeling was performed by incorporating oil soluble dyes into the larval diet. The pheromone traps were placed in a sugarcane field following the cardinal directions (North, South, East, West) around the release site. The results showed that more than 45 % of the labeled males were captured closer to the release site. Climatic factors such as temperature, relative humidity, wind speed and rain do not affect decisively in the release or wild males capture. The wind direction is important in D. saccharalis dispersal, once the majority of insects flew towards the wind. The most adequate model to explain the relationship between flight distance and number of captured insects is y = a2/(1+(2a1,8bx))2,6. Thus, for resistance management of D. saccharalis in genetically modified sugarcane expressing Bacillus thuringiensis Berliner proteins, the refugia sites should be kept at most 800 m apart
De, Faria Luciano. "Airflow in the urban environment : an evaluation of the relationship between urban aspect ratios and patterns of airflow, wind velocity and direction in urban areas, and coefficient of pressure distribution on building envelopes." Thesis, Cardiff University, 2012. http://orca.cf.ac.uk/45307/.
Full textGreenland, Christopher. "Meteorologiska mätningar med drönare." Thesis, Uppsala universitet, Luft-, vatten och landskapslära, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-384951.
Full textThe aim of this report was to study how UAV:s can be applied in meteorological research and find out how good drones are at measuring meteorological parameters. A drone, also known as an UAV (Unmanned Aerial Vehicle) is a smaller unmanned aircraft that can fly autonomously or under remote control. Today, drones are used more frequently in meteorology, mostly due to the recent technological development. Examples of meteorological applications include measurements of wind speed and the amount of carbon dioxide in the air which can be used to analyze the lower parts of the atmosphere. In this project, the wind speed and its direction, the temperature and the relative humidity were measured at different heights. The measurements took place twice in Marsta which is a field station outside Uppsala. Then, the data from the drone was compared to the data from a weather tower at the instrumented station. The results showed that the drone’s wind profiles were relatively similar to the profiles according to the tower and the logarithmic wind profiles. For instance, during the first flight the drone estimated the wind speed to be 8.13 ± 1.33 m/s while hovering ten metres above the ground. The tower measured 8.41 ± 0.958 m/s at the same height. The drone’s estimations of the wind direction were sometimes accurate and sometimes not accurate. The temperature and relative humidity however was different by 1 ◦C and ten percentage units respectively.
Puhl, Patricia Roberta. "O campo de dunas transgressivo da barreira costeira holocênica no litoral norte do Rio Grande do Sul: possíveis controles do seu desenvolvimento." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2017. http://hdl.handle.net/10183/164334.
Full textIn the north coast of Rio Grande do Sul, to the north of Xangri-lá beach, the Holocene barrier is partially covered by the modern and relatively active phase of a transgressive dune field, while to the south of this balneario the dune field completely covers the barrier. This work contributed to the knowledge about this differentiated development behavior of the modern phase of the transgressive dune field on the holocene barrier. Time series of wind (direction and speed) and precipitation of meteorological stations located to the south and north of Xangri-lá were used, as well as simultaneous wind measurements using portable anemometers, immediately to the north and south of this balneario. Sand transport potentials were calculated for both meteorological stations. Historical records of the Tramandaí station (further south) indicated higher wind speeds and lower precipitation relative to the Torres station (further north). Due to the greater speed of the winds in Tramandaí, the potential of sand transport in this locality was higher than Torres, indicating the favor of the migration of the dunes in its proximities. The uneven developmental behavior of the modern phase of the transgressive dune field can then be related to the higher speed and frequency of the NNE, NE, ENE and E winds in Tramandaí (ie, south of Xangri-lá), as well as the lower precipitation also favors more efficient sand transportation south of Xangri-lá.
Filka, Tomáš. "Bezdrátová meteorologická stanice." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2017. http://www.nusl.cz/ntk/nusl-318177.
Full textKwon, Sun Hong. "Directional growth of wind generated waves." Diss., Virginia Polytechnic Institute and State University, 1986. http://hdl.handle.net/10919/49816.
Full textJacko, Róbert. "Energeticky soběstačný bezdrátový modul pro senzorické aplikace." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2014. http://www.nusl.cz/ntk/nusl-220606.
Full textAbu-hamdeh, Muthanna S. "Modeling of Bi-directional Converter for Wind Power Generation." The Ohio State University, 2009. http://rave.ohiolink.edu/etdc/view?acc_num=osu1259684130.
Full textLink, Adam John. "Identifying Potential Patterns of Wildfires in California in Relation to Soil Moisture using Remote Sensing." Bowling Green State University / OhioLINK, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=bgsu158646328387007.
Full textCaeiro, Olaio Valente Maria Antonia. "Effects of directional wind shear on orographic gravity wave drag." Thesis, University of Reading, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.325212.
Full textGuarino, Maria Vittoria. "Mountain wave breaking in atmospheric flows with directional wind shear." Thesis, University of Reading, 2017. http://centaur.reading.ac.uk/75850/.
Full textAyala, Monica. "Climate Variability from 1980 to 2018 and its Effect on Wind Directions, Wind Speeds, and Vog Dispersal in Hawaii." Digital Commons @ East Tennessee State University, 2020. https://dc.etsu.edu/etd/3776.
Full textMaysonet, Joel R. "Wine & Beer." Thesis, University of North Texas, 2005. https://digital.library.unt.edu/ark:/67531/metadc4951/.
Full textCochrane, Brian. "A faithful interpretation of an unfaithful translation : directing Wild Honey." Thesis, University of British Columbia, 2011. http://hdl.handle.net/2429/37729.
Full textLundmark, Linn. "(O)avsiktliga följder av vindkraft : - en tolkning av villkoret "avsiktligt" i artskyddsförordningen." Thesis, Uppsala universitet, Juridiska institutionen, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-265191.
Full textWuttke, Brian C. "A Model Describing the Effects of Equipment, Instruction and Director and Student Attributes on Wind-Band Intonation." Scholarly Repository, 2011. http://scholarlyrepository.miami.edu/oa_dissertations/564.
Full textKumar, Manoj. "In-situ monitoring of an Omni directional roof vent on a low slope single ply roof to identify most efficient porous underlayment for maximum pressure propagation." Thesis, Virginia Tech, 2006. http://hdl.handle.net/10919/33115.
Full textMaster of Science
Widmann, Thomas J. "The role of Dpp and Wingless signaling gradients in directing cell shape during Drosophila wing imaginal disc development." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2010. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-27123.
Full textMorphogenese in Tieren wird in hohem Maße von konzertierten Zellformveränderungen einzelner Zellen bewirkt. Es ist jedoch noch nicht hinreichend verstanden, wie Zellformveränderungen in sich entwickelnden Tieren reguliert und koordiniert werden. Hier zeigen wir, dass die zwei zueinander senkrecht stehenden Signalgradienten der Morphogene Dpp, eines TGF-β Homologs, und Wingless, eines Mitglieds der Wnt Familie, im sich entwickelnden Drosophila-Flügel Gewebe-Homöostase aufrechterhalten und Zellformveränderungen kontrollieren. Klone von Zellen, denen Dpp oder Wingless Signalaktivität fehlt, invaginieren von ihrer apikalen Seite her, verkürzen sich in apiko-basaler Richtung und extruieren im Folgenden auf der basalen Seite des Epithels, ohne es zu zerstören. Während der frühen Larvalentwicklung korreliert das Anschalten der Dpp und Wingless Signale mit der Zellformveränderung der Flügelscheibenzellen von kuboidal zu kolumnar. Gradienten in der apiko-basalen Länge von kolumnaren Zellen korrelieren während der späten Larvalentwicklung mit den Gradienten der Dpp und Wingless Signalaktivitäten. Zellen, die hohe Werte an Dpp und Wingless Signalen empfangen, sind am meisten elongiert und apikal konstringiert. Niedrige Werte von Dpp und Wingless Signalen korrelieren mit kürzerer und apikal weiterer Zellmorphologie. Dpp und Wingless Signale werden zellautonom gebraucht für die Aufrechterhaltung der elongierten Zellform von späten larvalen Flügelscheibenzellen. Die Überaktivierung dieser Signalwege führt zu vorzeitiger Zellverlängerung während der frühen Larvalentwicklung. Diese morphogenetischen Antworten auf Dpp und Wingless benötigen die Transkriptionsfaktor-Komplexe Mad beziehungsweise Tcf/β-catenin, was darauf hindeutet, dass sie durch Änderungen in der Genexpression vermittelt werden. Die morphogenetische Funktion von Wingless wird teilweise durch eines seiner Zielgene, Vestigial, vermittelt. Wingless Signale fördern die Anreicherung von E-cadherin an den Adherensverbindungen. Wir zeigen hier, dass E-cadherin gebraucht wird, um apiko-basale Zelllänge aufrechtzuerhalten. Dpp Signale kontrollieren die subzelluläre Verteilung der Aktivitäten der kleinen GTPase Rho1 und der regulatorischen leichten Kette von nicht-muskulärem Myosin II (MRLC). Eine Änderung in der Rho1 oder MRLC Aktivität hat weitreichende Auswirkungen auf die apiko-basale Zelllänge. Schließlich zeigen wir noch, dass eine Verringerung der Rho1 oder MRLC Aktivitäten die Zellverkürzung von Dpp-Signal kompromittierten Zellen rettet. Unsere Resultate identifizieren zellautonome Rollen für Dpp und Wingless Signale in der Förderung und Aufrechterhaltung der elongierten kolumnaren Zellform von Flügelimaginalscheibenzellen. Darüber hinaus suggerieren sie, dass Dpp und Wingless Signale die Zellform durch die Regulierung des Aktin-MyosinII/E-cadherin-Netzwerks kontrollieren
Widmann, Thomas J. "The role of Dpp and Wingless signaling gradients in directing cell shape during Drosophila wing imaginal disc development." Doctoral thesis, Technische Universität Dresden, 2009. https://tud.qucosa.de/id/qucosa%3A25235.
Full textMorphogenese in Tieren wird in hohem Maße von konzertierten Zellformveränderungen einzelner Zellen bewirkt. Es ist jedoch noch nicht hinreichend verstanden, wie Zellformveränderungen in sich entwickelnden Tieren reguliert und koordiniert werden. Hier zeigen wir, dass die zwei zueinander senkrecht stehenden Signalgradienten der Morphogene Dpp, eines TGF-β Homologs, und Wingless, eines Mitglieds der Wnt Familie, im sich entwickelnden Drosophila-Flügel Gewebe-Homöostase aufrechterhalten und Zellformveränderungen kontrollieren. Klone von Zellen, denen Dpp oder Wingless Signalaktivität fehlt, invaginieren von ihrer apikalen Seite her, verkürzen sich in apiko-basaler Richtung und extruieren im Folgenden auf der basalen Seite des Epithels, ohne es zu zerstören. Während der frühen Larvalentwicklung korreliert das Anschalten der Dpp und Wingless Signale mit der Zellformveränderung der Flügelscheibenzellen von kuboidal zu kolumnar. Gradienten in der apiko-basalen Länge von kolumnaren Zellen korrelieren während der späten Larvalentwicklung mit den Gradienten der Dpp und Wingless Signalaktivitäten. Zellen, die hohe Werte an Dpp und Wingless Signalen empfangen, sind am meisten elongiert und apikal konstringiert. Niedrige Werte von Dpp und Wingless Signalen korrelieren mit kürzerer und apikal weiterer Zellmorphologie. Dpp und Wingless Signale werden zellautonom gebraucht für die Aufrechterhaltung der elongierten Zellform von späten larvalen Flügelscheibenzellen. Die Überaktivierung dieser Signalwege führt zu vorzeitiger Zellverlängerung während der frühen Larvalentwicklung. Diese morphogenetischen Antworten auf Dpp und Wingless benötigen die Transkriptionsfaktor-Komplexe Mad beziehungsweise Tcf/β-catenin, was darauf hindeutet, dass sie durch Änderungen in der Genexpression vermittelt werden. Die morphogenetische Funktion von Wingless wird teilweise durch eines seiner Zielgene, Vestigial, vermittelt. Wingless Signale fördern die Anreicherung von E-cadherin an den Adherensverbindungen. Wir zeigen hier, dass E-cadherin gebraucht wird, um apiko-basale Zelllänge aufrechtzuerhalten. Dpp Signale kontrollieren die subzelluläre Verteilung der Aktivitäten der kleinen GTPase Rho1 und der regulatorischen leichten Kette von nicht-muskulärem Myosin II (MRLC). Eine Änderung in der Rho1 oder MRLC Aktivität hat weitreichende Auswirkungen auf die apiko-basale Zelllänge. Schließlich zeigen wir noch, dass eine Verringerung der Rho1 oder MRLC Aktivitäten die Zellverkürzung von Dpp-Signal kompromittierten Zellen rettet. Unsere Resultate identifizieren zellautonome Rollen für Dpp und Wingless Signale in der Förderung und Aufrechterhaltung der elongierten kolumnaren Zellform von Flügelimaginalscheibenzellen. Darüber hinaus suggerieren sie, dass Dpp und Wingless Signale die Zellform durch die Regulierung des Aktin-MyosinII/E-cadherin-Netzwerks kontrollieren.
Eisazadeh, Moghaddam Arash. "Pocket beach wave processes and current systems investigated via field and numerical modelling studies: A case study of Okains Bay." Thesis, University of Canterbury. Geography, 2015. http://hdl.handle.net/10092/10478.
Full textVillafañe, Roca Laura. "Experimental Aerothermal Performance of Turbofan Bypass Flow Heat Exchangers." Doctoral thesis, Universitat Politècnica de València, 2014. http://hdl.handle.net/10251/34774.
Full textVillafañe Roca, L. (2013). Experimental Aerothermal Performance of Turbofan Bypass Flow Heat Exchangers [Tesis doctoral no publicada]. Universitat Politècnica de València. https://doi.org/10.4995/Thesis/10251/34774
TESIS
Eric, MANIRAGUHA, NTAGWIRUMUGARA Etienne, and Nenad GLODIC. "UTILIZATION OF WIND POWER IN RWANDA: Design and Production Option." Thesis, KTH, Skolan för industriell teknik och management (ITM), 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-240659.
Full textI WISH TO PUBLISH MY THESIS
Nelson, Edward. "Hydropower in Scotland : linking changing energy and environmental agendas with sustainability outcomes." Thesis, University of Stirling, 2013. http://hdl.handle.net/1893/20282.
Full textSnyder, Mark Alan. "Long-Term Ambient Noise Statistics in the Gulf of Mexico." ScholarWorks@UNO, 2007. http://scholarworks.uno.edu/td/595.
Full text