Bibliographies thématiques / Wet and Dry cycles / Thèses
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Thèses sur le sujet « Wet and Dry cycles »

Auteur : Grafiati
Publié le 9 mars 2023
Mis à jour le 10 mars 2023

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1

Olshansky, Yaniv, Robert A. Root, and Jon Chorover. "Wet–dry cycles impact DOM retention in subsurface soils." COPERNICUS GESELLSCHAFT MBH, 2018. http://hdl.handle.net/10150/627113.

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Transport and reactivity of carbon in the critical zone are highly controlled by reactions of dissolved organic matter (DOM) with subsurface soils, including adsorption, transformation and exchange. These reactions are dependent on frequent wet–dry cycles common to the unsaturated zone, particularly in semi-arid regions. To test for an effect of wet–dry cycles on DOM interaction and stabilization in subsoils, samples were collected from subsurface (Bw) horizons of an Entisol and an Alfisol from the Catalina-Jemez Critical Zone Observatory and sequentially reacted (four batch steps) with DOM ex
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Al-Hussaini, Osama. "Volume change behaviour of some geomaterials under combined influence of freeze-thaw and wet-dry cycles : an experimental investigation." Thesis, Cardiff University, 2017. http://orca.cf.ac.uk/110778/.

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Climate change has led to more extreme weather during the last decades. Seasonally hot weather regions have experienced harsh winters. Similarly, the global warming has contributed to raising the mean summer temperature in the cold regions. Geomaterials in various engineering applications are expected to experience such changes in the weather patterns and may undergo freezing, thawing, wetting and drying processes. This thesis presents an experimental study of the one-dimensional volume change behaviour of some geomaterials under the combined influence of freeze-thaw and wet-dry cycles. Labora
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O'Keefe, Sorche. "The recovery of soils after compaction : a laboratory investigation into the effect of wet/dry cycles on bulk density and soil hydraulic functions." Thesis, Cranfield University, 2009. http://dspace.lib.cranfield.ac.uk/handle/1826/4493.

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Van den Akker et al. (2003) stated that “European subsoils are more threatened than ever in history” in an editorial referring to the results of the European Union concerted action “Experiences with the impact of subsoil compaction on soil crop growth and environment and ways to prevent subsoil compaction”. Compaction of agricultural soils not only reduces yields but can lead to pollution of surface waters and the release of greenhouse gases. Understanding, therefore, how, and to what extent, subsoil compaction may be reversed seems of vital importance. The literature suggests that soils with
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4

Marchi, Fabio. "Effect of moisture susceptibility on different bituminous mastics." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2019. http://amslaurea.unibo.it/17619/.

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Moisture or water damage in asphalt mixtures can be defined as the loss of strength and durability, and an increase in stiffness leading to a more brittle behavior of materials and cause the adhesive failure at the binder-aggregate surface and/or cohesive failure within the binder or mastics. The performance and behaviour of asphalt mixtures are strictly dependent on the response of bituminous binders and mastics. The scope of this research is to acquire information on how moisture may affect rheological and chemical properties of different mastics made by different fillers. A neat bitumen and
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5

Foerster, Verena Elisabeth [Verfasser], Frank [Akademischer Betreuer] Schäbitz, and Olaf [Akademischer Betreuer] Bubenzer. "Late Quaternary climate variability in the source region of Homo sapiens. Dry-wet cycles in Chew Bahir, southern Ethiopia / Verena Elisabeth Foerster. Gutachter: Frank Schäbitz ; Olaf Bubenzer." Köln : Universitäts- und Stadtbibliothek Köln, 2014. http://d-nb.info/1071369873/34.

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6

Ji, Xiaoyan. "Thermodynamic properties of humid air and their application in advanced power generation cycles." Doctoral thesis, Stockholm : Department of Chemical and Engineering and Technology, Royal Institute of Technology, 2006. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-4129.

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7

BAJNI, GRETA. "STATISTICAL METHODS TO ASSESS ROCKFALL SUSCEPTIBILITY IN AN ALPINE ENVIRONMENT: A FOCUS ON CLIMATIC FORCING AND GEOMECHANICAL VARIABLES." Doctoral thesis, Università degli Studi di Milano, 2022. http://hdl.handle.net/2434/913511.

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The overarching goal of the doctoral thesis was thus the development of a systematic procedure capable to examine and enhance the role of geomechanical and climatic processes in rockfall susceptibility, performed with statistically based and Machine Learning techniques. To achieve this purpose, two case studies were analysed in the Italian Alps (Valchiavenna, Lombardy Region; Mountain Communities of Mont Cervin and Mont Emilius, Aosta Valley Region). For both case studies, Generalized Additive Models (GAM) were used for rockfall susceptibility assessment; for the Valchiavenna case study, a Ra
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8

Thouin, Hugues. "Transfert de polluants inorganiques dans un technosol de brûlage d’armes organo-arséniées soumis à un apport de matière organique et à des cycles de saturation/désaturation : expérimentation en mésocosme." Thesis, Orléans, 2016. http://www.theses.fr/2016ORLE2069/document.

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La destruction par brûlage de munitions chimiques de la Première Guerre Mondiale a provoqué une contamination importante de la partie supérieure du sol du site de la Place-à-Gaz par l’arsenic, le zinc, le cuivre et le plomb. Le traitement thermique a eu pour effet de minéraliser l’As des agents de guerre organoarséniés, et de former un assemblage minéral inattendu composé d’arséniates de Zn, Cu et Fe, et d’une phase amorphe riche en Fe, As, Zn, Cu et Pb. Ce matériel amorphe est la principale phase porteuse de l’As et des métaux dans la zone la plus polluée. Le site est sujet à des changements
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9

Cowan, Linda J. "The use of wet-to-dry dressings." [Gainesville, Fla.] : University of Florida, 2004. http://purl.fcla.edu/fcla/etd/UFE0008780.

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Thesis (M.S.N.)--University of Florida, 2004.<br>Typescript. Title from title page of source document. Document formatted into pages; contains 73 pages. Includes Vita. Includes bibliographical references.
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10

Susna, David. "Návrh chladícího okruhu pro odvod tepla z kondenzátoru parní turbíny." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2018. http://www.nusl.cz/ntk/nusl-378737.

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This thesis deals with the problems of wounding of low potential transferred from steam turbine condenser. First, in the theoretical part variations of steam condenser design are described. Then there is a description of variations of cooling cycles and possibilities of their operation range. In second part of the thesis there are two common cooler options chosen. Those are wet cooling tower with natural draft and dry chiller with forced draft. Two types of cooling liquid are chosen to be used for dry cooling. These are water and the other one is 50 % mixture of water and propylene glycol. Bas
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11

Villa, Katherine. "The use of wet-to-dry dressings for mechanical debridement." Honors in the Major Thesis, University of Central Florida, 2013. http://digital.library.ucf.edu/cdm/ref/collection/ETH/id/928.

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Clinical management of complex wounds is essential to promote wound healing. Prolonged healing time may lead to longer and more costly hospitalizations and poorer patient outcomes. The removal of nonviable, necrotic tissue via debridement is vital to the healing process. One of the most common debridement techniques, in the United States, is the use of wet-to-dry dressings. There are no defined guidelines or protocols for the timing of dressing changes and subsceequent debridement. The purpose of this study was to perform a review of literature to determine the rationale for the use of wet-to-
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12

Barclay, Jennifer Jayne. "Wet and dry troughs over Southern Africa during early summer." Master's thesis, University of Cape Town, 1992. http://hdl.handle.net/11427/21786.

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The synoptic scale structure of troughs transiting southern Africa in October and November is examined. Cases are chosen on the basis of an upper trough being present over southern Africa, and a minimum horizontal and vertical temperature change. Wet and dry troughs are differentiated by the extent and amount of interior rainfall produced. Once selected, a spatial and temporal framework was used on surface, upper-level synoptic maps and radiosonde sections. Individual and composite time-height and spatial sections are analysed for anomalies of temperature, geopotentials, kinematic, vorticity a
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13

Uren, Sally Clare. "The effects of wet and dry deposited ammonia on Calluna vulgaris." Thesis, Imperial College London, 1992. http://hdl.handle.net/10044/1/8895.

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Driejana, Ir. "Wet and dry deposition in the Derbyshire Peak District, Northern England." Thesis, Manchester Metropolitan University, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.390785.

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15

VILLELA, MARCOS JOSE REI. "TEMPERATURE BEHAVIOR ANALYSIS OF OIL PRODUCTION SYSTEMS: DRY AND WET COMPLETION COMPARISON." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2004. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=6084@1.

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PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO<br>Cerca de 50 por cento das reservas brasileiras de hidrocarbonetos estão localizadas na plataforma continental em lâminas de água superiores a mil metros. As temperaturas congelantes do fundo do mar tornam os problemas inerentes ao escoamento da produção de petróleo, ainda mais críticos. Entretanto, os desafios da garantia de escoamento, não são os únicos obstáculos para a produção de petróleo em águas ultra-profundas. Além dos aspectos relacionados à geologia e fatores econômicos, a decisão de desenvolvimento de um campo de petróleo
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16

Caldini, Nayara Nunes. "Use of bioflocs biomass wet and dry for feeding of Nile tilapia." Universidade Federal do CearÃ, 2015. http://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=14408.

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Conselho Nacional de Desenvolvimento CientÃfico e TecnolÃgico<br>This study consisted of two experiments. The first objective was to demonstrate the technical feasibility of separate BFT tank technology in juvenile cultivation of Nile tilapia, for monitoring quality variables of water and productive performance. The fish were fed different combinations of artificial food (balanced diet) and natural food (bioflocs biomass). As the supply of food decreased the tanks increased the biomass supply bioflocs. Bioflocs biomass was produced in an external tank 500 L, separately from the cultivation sys
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17

Kerr, Kent. "Sampling for Beryllium Surface Contamination using Wet, Dry and Alcohol Wipe Sampling." Washington, D.C. : Oak Ridge, Tenn. : United States. National Nuclear Security Administration ; distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy, 2004. http://www.osti.gov/servlets/purl/837587-M4P95G/native/.

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Thesis (M.S.); Submitted to Central Missouri State University, Warrensburg, MO (US); 17 Dec 2004.<br>Published through the Information Bridge: DOE Scientific and Technical Information. Kerr, Kent. NNSA Kansas City Site Office (US) NNSA Kansas City Site Office. 12/17/2004. Report is also available in paper and microfiche from NTIS.
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18

Goode, James Bruce. "Transitioning of spent advanced gas reactor fuel from wet to dry storage." Thesis, University of Leeds, 2017. http://etheses.whiterose.ac.uk/20585/.

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Upon removal from a reactor spent nuclear fuel is placed into water storage for a period of time since water provides both a decay heat sink and radiation shielding. In the UK this fuel has traditionally been reprocessed however the decision has been made that this will cease in 2018 in favour of an open fuel cycle and direct disposal to a degological disposal facility, although this is not expected to be available until 2075. Current experience with pond storage has found that fuel can be safely stored in caustic dosed ponds for at least 25 years and therefore the current plan is to extend wa
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19

Vaishampayan, Deep. "Dielectric Spectroscopy of Bisphenol A Epoxy Resin Aged in Wet and Dry Conditions." Thesis, Norwegian University of Science and Technology, Department of Electrical Power Engineering, 2009. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-9932.

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<p>This thesis presents the laboratory test data on Bisphenol A epoxy insulation.This thesis work deals with electrical, mechanical and thermal analysis of Bisphenol A epoxy resin. The main aim of this thesis work was to examine if dry and wet aging changes the glass transition temperature (Tg) of the epoxies and measure the impact on the complex permittivity under different ageing conditions namely dry and wet. During ageing the samples (epoxy discs and dog bones) were kept in water at 20°C, 45°C and 80°C both in dry and wet conditions for a period of one month. After the samples were removed
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Lodhia, Prashant Twomey Janet. "A macro level environmental performance comparison dry machining process vs wet machining process /." Diss., A link to full text of this thesis in SOAR, 2007. http://soar.wichita.edu/dspace/handle/10057/1146.

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Thesis (M.S.)--Wichita State University, College of Engineering, Dept. of Industrial and Manufacturing Engineering.<br>"May 2007." Title from PDF title page (viewed on Dec. 27, 2007). Thesis adviser: Janet Twomey. Includes bibliographic references (leaves 52-54).
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Lineton, Warran Boyd. "An investigation into dry and wet textile friction and lubrication in practical applications." Thesis, De Montfort University, 1999. http://hdl.handle.net/2086/10707.

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The lubrication of dry viscose fibres by a two component finish, and the lubrication of wet Iyocell fabric against metal, with various aqueous lubricant systems, has been studied. Secondary ion mass spectrometry (SIMS) was investigated as a means of providing direct chemical information from finished fibre surfaces. The composition and distribution of a two component finish applied to viscose fibres was determined successfully. When applying finish from a bath, the surface composition of the finished fibres was not controlled by the bath conditions. Increasing the concentration of finish in th
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22

Mahmoodabadi, Majid. "KOREAN ANTHRACITE COAL CLEANING BY MEANS OF DRY AND WET BASED SEPARATION TECHNOLOGIES." UKnowledge, 2015. http://uknowledge.uky.edu/mng_etds/18.

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Korean coals are typically high rank anthracite characterized by high ash content and difficult cleaning characteristics. The main objective of the study was to evaluate the feasibility of treating various size fractions within the coal using an assortment of physical coal cleaning technologies. Dry cleaning is preferred due to the friability of the coal. As such, three pneumatic processes were tested including Ore Sorting for the plus 10 mm material, Air Table Separation for 10 x 1 mm fraction and Tribo-electric Separator for - 1 mm fraction. The Dense Medium Cyclone is known to be one of the
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23

Anderson, Neil Raymond. "Evaluation of the performance characteristics of a hybrid (dry/wet) induced draft dephlegmator." Thesis, Stellenbosch : Stellenbosch University, 2014. http://hdl.handle.net/10019.1/96105.

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Thesis (MEng)--Stellenbosch University, 2014.<br>ENGLISH ABSTRACT: A novel induced draft hybrid (dry/wet) dephlegmator (HDWD) is introduced which can enhance the performance of dry air-cooled condenser systems and a model is developed to simulate its performance. The HDWD consists of two stages of cooling with the steam flow in series and the air flow in parallel through both stages. The first stage consists of downwardly inclined finned tube bundles, similar to conventional air-cooled condenser bundles, and the second stage comprises horizontal bare tube bundles of which the outer surfa
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Wenzl, Jennifer [Verfasser]. "Wet and dry model granulates under mechanical load : a confocal microscopy study / Jennifer Wenzl." Mainz : Universitätsbibliothek Mainz, 2014. http://d-nb.info/1049672674/34.

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Young, Garth William II. "Evaluation of Friction Stir Processing of HY-80 Steel Under Wet and Dry Conditions." Thesis, Monterey, California. Naval Postgraduate School, 2012. http://hdl.handle.net/10945/6892.

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This thesis describes the microstructural and mechanical property changes associated with Friction Stir Processing (FSP) of HY-80 steel under dry and underwater conditions. HY-80 is a low-carbon alloy steel that is used in a quenched and tempered condition and is highly susceptible to hydrogen assisted cracking associated with conventional fusion welding. FSW/P (400 RPM/ 2 IPM) was conducted using a polycrystalline cubic boron nitride tool having a pin length of 6.35 mm. Two sets of processing runs were completed on HY-80 plates, 6.35 mm in thickness, one dry and the other under seawater.
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CAC, FRANKY EDUARDO REYES. "METROLOGICAL ANALYSIS OF THE TRANSIENT BEHAVIOR OF A WET BULB AND DRY BULB PSYCHROMETER." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2005. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=6718@1.

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PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO<br>Este trabalho apresenta um estudo do comportamento transiente de um medidor de umidade tipo bulbo úmido e bulbo seco, assim como a determinação da umidade do ar em diferentes condições ambientais, que foram simuladas em laboratório. O psicrômetro do tipo bulbo úmido e bulbo seco é amplamente utilizado na indústria de ar condicionado, na monitoração da umidade em ambientes fechados, nas estações de meteorologia para a monitoração da umidade da atmosfera, e na prevenção das condições climáticas. Para o desenvolvimento do presente trabal
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Ho, Genevieve Edine. "Analysis of wet & dry weather bacterial concentrations within Kranji & Marina Catchments, Singapore." Thesis, Massachusetts Institute of Technology, 2011. http://hdl.handle.net/1721.1/66833.

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Thesis (M. Eng.)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, 2011.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (p. 75-79).<br>The Singaporean government's Public Utilities Board aims to open Kranji and Marina Reservoirs to the public for recreational use. Thus, the water bodies have to be safe from fecal contamination in order to protect the people's health during water-contact activities. Under the Singapore-MIT Alliance for Research and Technology (SMART) program, faculty and students from Nanyang Technological Uni
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Heyns, Johan Adam. "Performance characteristics of an air-cooled steam condenser incorporating a hybrid (dry/wet) dephlegmator." Thesis, Stellenbosch : Stellenbosch University, 2008. http://hdl.handle.net/10019.1/350.

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Thesis (MScEng (Mechanical and Mechatronic Engineering))--Stellenbosch University, 2008.<br>This study evaluates the performance characteristics of a power plant incorporating a steam turbine and a direct air-cooled dry/wet condenser operating at different ambient temperatures. The proposed cooling system uses existing A-frame air-cooled condenser (ACC) technology and through the introduction of a hybrid (dry/wet) dephiegmator achieves measurable enhancement in cooling performance when temperatures are high. In order to determine the thermal-flow performance characteristics of the wet section
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Falloon, S. S. "An experimental study of friction between wet and dry human skin and nonwoven fabrics." Thesis, University College London (University of London), 2014. http://discovery.ucl.ac.uk/1458878/.

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Many people who have urinary incontinence manage it with the use of absorbent hygiene products, such as pads. Long-term use of these products can lead to abrasion by friction between the topsheet (a nonwoven fabric) and the skin, and is exacerbated when the skin is wet. However, the nature and mechanisms of friction between skin and nonwovens are poorly understood, hindering progress to improve products. Most work on skin friction to date has involved the use of skin surrogates or real skin in the dry state only. Moreover, only a narrow range of different nonwoven fabrics have been investigate
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Kidanemariam, Mussie T. "Mechanisms for the wet and dry years over Eritrea during the summer rainfall season." Master's thesis, University of Cape Town, 2003. http://hdl.handle.net/11427/6978.

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Bibliography: leaves 54-57.<br>The economy of Eritrea depends on rain-fed agriculture, which is highly sensitive to seasonal and inter-annual variations of rainfall. Adequate amount of rainfall is required every year for adequate agricultural production and drinking water. Therefore, the distribution of seasonal rainfall in space and time is critical to the country's economy. Drought has great influence on the socio-economic aspect and livelihood of the rural population. Drought occurs in Eritrea due to anomalous regional atmospheric circulation. This study focuses on the summer rainy season o
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Broadley, Andrew. "Assessing the effect of water resource development on fisheries in the wet-dry tropics." Thesis, Griffith University, 2021. http://hdl.handle.net/10072/405635.

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The growing demand for freshwater resources has led to dam construction and water diversions in a majority of the world’s large rivers. The regulation of river flows, coupled with changes to land use in and around coastal areas, has far-reaching consequences not only for the ecology of rivers but also for fisheries in marine ecosystems. The challenges of quantifying the influence of regulated flows on marine fish stocks is complicated by our poor understanding of how flow induced processes interact over spatial and temporal scales throughout a species life history. The life history of the bana
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Leigh, Catherine. "Floodplain river function in Australia's wet/dry tropics, with specific reference to aquatic macroinvertebrates and the Gulf of Carpentaria." Thesis, Griffith University, 2009. https://eprints.qut.edu.au/119606/1/Leigh_2009_02Thesis.pdf.

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This thesis provides significant insight into our understanding of river function in highly seasonal systems. In north Australia’s vast wet/dry tropics, large rivers and associated wetlands are regarded among the continent’s most biologically diverse and ecologically healthy. Until recently however, research on the hydrology, biodiversity and function of Australian rivers has focussed on the south. My thesis investigates floodplain river function in Australia’s wet/dry tropics, more specifically in the Gulf of Carpentaria drainage division, and is the first to present a dynamic conceptual mode
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Guan, Lan. "Wet-milling of waxy wheat flours and characteristics of waxy wheat starch." Thesis, Manhattan, Kan. : Kansas State University, 2008. http://hdl.handle.net/2097/955.

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Benítez, Juan Manuel González. "Quantification of atmospheric water soluble inorganic and organic nitrogen." Thesis, University of Edinburgh, 2010. http://hdl.handle.net/1842/4635.

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The key aims of this project were: (i) investigation of atmospheric nitrogen deposition, focused on discrimination between bulk, wet and dry deposition, and between particulate matter and gas phase, (ii) accurate quantification of the contributions of dissolved organic and inorganic nitrogen to each type of deposition, and (iii) exploration of the origin and potential sources of atmospheric water soluble organic nitrogen (WSON). This project was particularly focused on the WSON fraction because, despite it being a potentially important source of bioavailable reactive nitrogen, a number of ques
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Schofield, Jamie Rae. "Electrocardiogram Signal Quality Comparison Between A Dry Electrode and A Standard Wet Electrode over a Period of Extended Wear." Cleveland State University / OhioLINK, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=csu1334707695.

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Sinsheimer, Peter. "Fashioning a greener shade of clean integrating pollution prevention into public policy : the case of professional wet cleaning /." Diss., Restricted to subscribing institutions, 2009. http://proquest.umi.com/pqdweb?did=1835200081&sid=1&Fmt=2&clientId=1564&RQT=309&VName=PQD.

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Baars, Holger. "Aerosol profiling with lidar in the Amazon Basin during the wet and dry season 2008." Doctoral thesis, Universitätsbibliothek Leipzig, 2012. http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-98757.

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Im Rahmen der vorliegenden Arbeit wurden die Eigenschaften von atmosphärischen Aerosolpartikeln im tropischen Regenwald des Amazonasgebietes bestimmt. Dazu wurden die Daten einer fast einjährigen Lidarmesskampagne ausgewertet und diskutiert. Die Messungen wurden mit einem automatischen Mehrwellenlängen-Polarisations-Raman-Lidar im zentralen Amazonasbecken nahe Manaus, Brasilien, im Zeitraum von Januar bis November 2008 durchgeführt. Somit konnten erstmalig optische und mikrophysikalische Aerosoleigenschaften im Amazonasgebiet während der Regenzeit (ca. Dezember-Mai) und Trockenzeit (ca. Juni-N
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Ankerfors, Caroline. "Polyelectrolyte complexes : Preparation, characterization, and use for control of wet and dry adhesion between surfaces." Doctoral thesis, KTH, Fiberteknologi, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-94138.

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This thesis examines polyelectrolyte complex (PEC) preparation, adsorption behaviour, and potential use for control of wet and dry adhesion between surfaces. PEC formation was studied using a jet-mixing method not previously used for mixing polyelectrolytes. The PECs were formed using various mixing times, and the results were compared with those for PECs formed using the conventional polyelectrolyte titration method. The results indicated that using the jet mixer allowed the size of the formed PECs to be controlled, which was not the case with the polyelectrolyte titration method, and a two-s
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Gitau, Wilson. "Diagnosis and predictability of intraseasonal characteristics of wet and dry spells over equatorial east Africa." Phd thesis, Université de Bourgogne, 2010. http://tel.archives-ouvertes.fr/tel-00794889.

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Most of Eastern Africa has arid and semi-arid climate with high space-time variability in rainfall. The droughts are very common in this region, and often persist for several years, preceded or followed by extreme floods. Most of the livelihoods and socio-economic activities however remain rain-dependent leading to severe negative impacts during the periods of occurrence of climate extremes. It has been noted that one extreme event was capable of reversing national economic growth made over a period of several years. Thus no sustainable development can be attained in eastern Africa without eff
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Makkawi, Yassir T. Makkawi. "Investigation of dry and semi-wet fluidized bed hydrodynamics utilizing twin-plane electrical capacitance tomography." Thesis, Heriot-Watt University, 2004. http://hdl.handle.net/10399/360.

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Thoithi, Wanjiru. "Assessing dry spell and wet day frequencies over southern Africa during the summer rainy season." Master's thesis, Faculty of Science, 2021. http://hdl.handle.net/11427/33990.

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Rainfall over southern Africa experiences substantial temporal and spatial variability which heavily impacts poor rural populations in the region that rely on rainfed agriculture for their livelihoods. Instead of totals, seasonal rainfall is better characterised by wet and dry events occurring within rainy seasons as knowledge of the frequency of such events is able to inform agricultural activity. Dry spells (pentads having <5 mm) and moderate wet days (10-30 mm) over southern Africa were assessed using high resolution (0.05◦) Climate Hazards group Infrared Precipitation with Stations (CHIRPS
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Alsaiari, Abdulmohsen Omar. "Augmentation of Jet Impingement Heat Transfer on a Grooved Surface Under Wet and Dry Conditions." Diss., Virginia Tech, 2018. http://hdl.handle.net/10919/98502.

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Array jet impingement cooling experiments were performed on flat and grooved surfaces with the surface at a constant temperature. For the flat surface, power and temperature measurements were performed to obtain convection coefficients under a wide range of operating conditions such as jet speed, orifice to surface stand-of distance, and open area percentage. Cooling performance (CP) was calculated as the ratio between heat transfer and fan power. An empirical model was developed to predict jet impingement heat transfer taking into account the entrainment effects. Experimental results showed
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Portugal, André Fernandes Vaz. "Validation of a FEM-based tool and implementation of tyres' dry and wet braking prediction." Master's thesis, Universidade de Aveiro, 2016. http://hdl.handle.net/10773/22755.

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Mestrado em Engenharia Mecânica<br>In the present document, a new explicit FEM-based software developed to optimize tyre pattern geometry is presented. The new software calculates forces and displacements in tyre tread components after applying a load and a longitudinal shear displacement. To overcome long meshing and calculation times, simplifications are made. In this work, the usability of the simplifications is checked and the new software is adjusted and validated through the use of other FEM-based software in the market (Abaqus). To perform the validation, models are created, reproducin
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Kayahan, Ahmet. "Compressibility Of Various Coarse-grained Fill Materials In Dry And Wet Loading Conditions In Oedometer Test." Master's thesis, METU, 2003. http://etd.lib.metu.edu.tr/upload/4/1052539/index.pdf.

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The use of coarse-grained fill materials has grown significantly in recent years especially on account of their use in dams and transportation networks. This study investigates compressibility of various coarse-grained fill materials in dry and wet loading conditions in oedometer test. Four materials were used in the experiments, which falls into GP, GW, GM and GC categories respectively. GP material is a weathered rock obtained from Eymir Lake region. This material was chosen especially to be able to investigate degradation and particle breakage due to compaction and compression. GW, GM and G
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Li, Chaoran [Verfasser], and J. [Akademischer Betreuer] Winter. "Wet and Dry Anaerobic Digestion of Biowaste and of Co-substrates / Chaoran Li. Betreuer: J. Winter." Karlsruhe : KIT-Bibliothek, 2015. http://d-nb.info/1068263415/34.

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Bostwick, LAURA. "Laboratory study of geosynthetic clay liner shrinkage when subjected to wet/dry cycles." Thesis, 2009. http://hdl.handle.net/1974/1919.

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Geosynthetic Clay Liners (or GCLs) are often used in conjunction with a geomembrane for landfills and heap-leach pads, where their function is to minimize leakage that may occur through holes in the geomembrane. GCLs are installed with overlapping panels and powdered bentonite placed between the overlaps to provide a better seal. Recent field exhumations of GCLs installed beneath a geomembrane left exposed to solar radiation have shown panel shrinkage; in some cases, this shrinkage was enough to leave exposed areas unprotected by the GCL. One hypothesized cause of this shrinkage is cyclic w
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Swanepoel, Wayne. "Wet compression versus dry compression in refrigeration cycles working with pure or non-azeotropic refrigerant mixtures for air-conditioners." Thesis, 2012. http://hdl.handle.net/10210/6097.

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M.Ing.<br>Wet compression versus dry compression in refrigeration cycles working with pure refrigerants or non-azeotropic mixtures is investigated in this paper. In total 34 pure refrigerants as well as 31 non-azeotropic binary mixtures are considered. This resulted in approximately 300 different mixtures being analysed. The pure refrigerants and refrigerant mixtures were analysed for one cooling application, namely that of spatial air conditioning at an evaporating temperature of 7°C, and a condensing temperature of 50°C. The investigation was conducted with cycle analyses calculating perform
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Su, Ken Yu Jen. "Effect of Laser Welding and Stretch Forming on the Corrosion Performance of Hot-Dip Galvanized Steel." Thesis, 2008. http://hdl.handle.net/10012/4088.

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The use of laser welding in the automotive industry in the past few decades has facilitated joining of hot-dip galvanized (HDG) steel sheets at high production rates and low cost. The recent development of tailor welded blanks (TWB) using laser welding allowed combinations of sheet grades and thicknesses to “tailor” the vehicle part for optimized design, structural integrity and crash performance but more importantly, reductions in weight. Welded blanks are further subjected to stamping or stretch forming prior to final assembly. Unfortunately, both welding and stretch forming cause the galvan
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Cheng, Fu-Pen, and 鄭福本. "The cyclic oxidation behavior of welded Ni-base superalloys at 950oC in dry and wet air." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/39852041160380415341.

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碩士<br>國立臺灣海洋大學<br>材料工程研究所<br>103<br>The cyclic oxidation behavior of three Ni-based¬-superalloy welds containing Hastelloy X (X), Incoloy 800H (800H), and Inconel 617 (617), in which each alloy contained the original substrate (M-SUB, where M could be X, 800H, or 617), the heat-affected zone (M-HAZ) and the melting zone (M-MZ) was studied at 950oC in dry/wet air. The results indicated that the oxidation kinetics of all the alloys in dry air followed a parabolic-rate law, indicating that diffusion is the rate-controlling step. In general, the steady-state oxidation rates of the M-HAZ regions ar
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Westfall, Erin. "Wet/Dry Mapping - 2008 Wet/Dry Poster." 2008. http://hdl.handle.net/10150/146073.

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