Log in

Relevant bibliographies by topics / Retention flow / Dissertations / Theses

To see the other types of publications on this topic, follow the link: Retention flow.

Dissertations / Theses on the topic 'Retention flow'

Author: Grafiati

Published: 4 June 2021

Last updated: 12 February 2022

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the top 50 dissertations / theses for your research on the topic 'Retention flow.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Browse dissertations / theses on a wide variety of disciplines and organise your bibliography correctly.

1

Svedberg, Anna. "Improvement of the retention-fromation relationship using three-component retention aid systems." Doctoral thesis, KTH, Fiberteknologi, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-96259.

Full text

APA, Harvard, Vancouver, ISO, and other styles

2

Al-Hashmi, Abdul-Aziz Rashid Mohammed. "Polymer retention during flow of polymer solutions through porous media." Thesis, Imperial College London, 2008. http://hdl.handle.net/10044/1/1372.

Full text

Abstract:

Polymer solution flow and retention through porous media is of interest to many applications in the oil industry such as drilling, water shut-off and enhanced oil recovery. Operators of mature oil and gas fields are faced with the problem of excessive water production (EWP), which can cause a premature abandonment of some oil and gas wells. It has been found that the injection of high molecular weight polymer solutions through the pay zones of the oil and gas wells would induce a sharp decrease of the water production without affecting the oil and gas production. This effect is called dispropo

APA, Harvard, Vancouver, ISO, and other styles

3

Srikongsri, Atitep. "A laboratory permeameter study of geotextile-soil retention in cyclic flow." Thesis, University of British Columbia, 2010. http://hdl.handle.net/2429/25029.

Full text

Abstract:

In the absence of an extensive body of laboratory and field data, empirical criteria for soil retention in dynamic or cyclic flow are not yet well-defined with reference to a margin of safety. A performance-based approach is taken in this study: the method of investigation involves laboratory tests on a total of seven geotextiles (needle-punched nonwoven and woven materials) and a total of four uniformly-graded soils (non-plastic fine sand and coarse silt). Filtration compatibility in unidirectional and cyclic flow reversal is evaluated using two rigid-wall permeameters: a small bench-mounte

APA, Harvard, Vancouver, ISO, and other styles

4

Zardava, Kiriaki. "Moisture retention and near saturated flow in Mechanically Biologically Treated (MBT) waste." Thesis, University of Southampton, 2012. https://eprints.soton.ac.uk/348825/.

Full text

Abstract:

The aim of this research is to understand the interactions between liquid and gas flow at high degrees of saturation, as this could have a significant effect on the effectiveness of landfill remediation by flushing. Particular attention is paid to two key parametric functions that are believed to control the simultaneous flow of leachate and gas in waste materials. These are the relationship between capillary pressure or suction and the degree of leachate saturation or volumetric moisture content, known as the moisture retention characteristic; and the relationship between unsaturated hydrauli

APA, Harvard, Vancouver, ISO, and other styles

5

Klute, Robert Cragg. "Enantiomeric separations by HPLC:temperature, mobile phase, flow rate and retention mechanism studies." Diss., Virginia Tech, 1993. http://hdl.handle.net/10919/38458.

Full text

Abstract:

The effects of changes in temperature, mobile phase composition, flow rate, and stationary phase upon the enantiomeric separation of several racemic mixtures are investigated. The changes in capacity factor (k'), selectivity (α), and efficiency (N) and enantiomeric resolution (R), are explored. Resolution is then shown to be controlled by the specific combination of chiral stationary phase (CSP), solute, mobile phase and temperature. The key to optimizing chiral resolution lies in understanding the retention mechanism(s) for a given CSP. The proposed retention mechanisms for the two CSP used

APA, Harvard, Vancouver, ISO, and other styles

6

Goulet, Richard Roger. "Mechanisms affecting metal retention by surface-flow wetlands in cold temperate climates." Thesis, University of Ottawa (Canada), 2001. http://hdl.handle.net/10393/9210.

Full text

Abstract:

The mechanisms affecting metal retention by surface-flow wetlands were investigated by relating variations in metal retention to variables such as hydraulic residence time, temperature (i.e. seasonal effects), phytoplankton biomass, photosynthesis and the presence of emergent vegetation. The importance of hydraulic residence time was investigated at the Monahan surface-flow wetland in Kanata, Ontario. This wetland retained metals best during summer and fall whereas during winter, the metal retention was significantly lower. The first-order removal model predicted Fe and Mn retention in the spr

APA, Harvard, Vancouver, ISO, and other styles

7

Klute, Robert Cragg. "Enantiomeric separations by HPLC : temperature, mobile phase, flow rate and retention mechanism studies /." This resource online, 1993. http://scholar.lib.vt.edu/theses/available/etd-06062008-171241/.

Full text

APA, Harvard, Vancouver, ISO, and other styles

8

Smith, Jennifer Claire. "Particle Retention in Suspension-Feeding Fish: Kinematics, Oral Flow Speed, and Particle Retention during Tilapia Suspension Feeding with Gill Rakers Intact vs Removed." W&M ScholarWorks, 2006. https://scholarworks.wm.edu/etd/1539626848.

Full text

APA, Harvard, Vancouver, ISO, and other styles

9

Waterhouse, Sara. "The retention testing of sterilising grade membranes with Pseudomonas diminuta." Thesis, Loughborough University, 1994. https://dspace.lboro.ac.uk/2134/13738.

Full text

Abstract:

Membranes with a pore size rating of 0.2μm are recommended for the sterilisation of liquids by filtration and are validated for this purpose by a retention test with Pseudomonas diminuta. Practices for retention testing were found to vary among the membrane manufacturers and only one type of commercial 0.2μm rated membrane was found to reliably retain P. diminuta. The retention for P. diminuta given by experimental grafted membranes was studied and was sometimes higher than that given by non-grafted membranes due to obstruction of the pores by graft material. The dimensions for individual cell

APA, Harvard, Vancouver, ISO, and other styles

10

Anyanwu, Ezechukwu John. "The Effect of Flow on the Development and Retention of Iron Sulfide Corrosion ProductLayers." Ohio University / OhioLINK, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1547118739941844.

Full text

APA, Harvard, Vancouver, ISO, and other styles

11

Dello, Sterpaio Patricia. "The impact of bacteria on the biophysics of water retention and flow in soil." Thesis, Abertay University, 2012. https://rke.abertay.ac.uk/en/studentTheses/2c3f3875-ea91-4ae1-a3e5-e44bc9e252e7.

Full text

Abstract:

Understanding soil structure, in particular the void spaces through which water, gases and solutes flow and in which organisms exist, is vital to a sustainable future on earth. The investigation of the structural behaviour of soil under different influences is fundamental to understanding and protecting the soil. This study has investigated the impact of bacteria on the biophysics of water retention and flow, aiming to elucidate the effect of three key components produced by the model organism, Pseudomonas fluorescens SBW25. Cellulose is an extracellular polysaccharide involved in the formatio

APA, Harvard, Vancouver, ISO, and other styles

12

Quinn, Ruth. "Evaluation of flow models and pollutant retention isotherms for their application to rain garden bioretention." Thesis, University of Greenwich, 2015. http://gala.gre.ac.uk/14319/.

Full text

Abstract:

The primary aims of this research was firstly to develop a computer modelling tool which could predict pollution retention in a rain garden and secondly to use the model and additional experiments to examine various aspects of rain garden design with respect to pollutant retention. Initially, the behaviour of all contaminants in urban runoff was examined including their retention and possible modelling methods. Heavy metals were then identified as the main focus of this project as this choice was the most beneficial addition to current research. The main factors affecting their retention were

APA, Harvard, Vancouver, ISO, and other styles

13

Weseman, Brian D. "The Effects of Retention Aid Dosage and Mechanical Energy Dissipation on Fiber Flocculation in a Flow Channel." Diss., Georgia Institute of Technology, 2004. http://hdl.handle.net/1853/7960.

Full text

Abstract:

Formation plays an important role in the end-use properties of paper products, but before formation can be optimized to achieve superior properties, an understanding about the causes of formation must be developed. Formation is caused by variations in the basis weight of paper that are results of fiber floc formation before and during the forming of the sheet. This project is a first step in a larger research program aimed at studying formation. By observing the effects that mechanical energy dissipation (in the form of turbulence) and retention chemical dosage have on floc formation, we may d

APA, Harvard, Vancouver, ISO, and other styles

14

Gillespie, William E. "Optimization of a retention pond design for nutrient trapping and peak flow reduction within an agricultural basin /." Available to subscribers only, 2006. http://proquest.umi.com/pqdweb?did=1203570501&sid=25&Fmt=2&clientId=1509&RQT=309&VName=PQD.

Full text

APA, Harvard, Vancouver, ISO, and other styles

15

Cheng, Hua. "Hydrodynamic control of retention in heterogeneous aquifers and fractured rock." Doctoral thesis, Stockholm : KTH Architecture and the Built Environment, 2005. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-496.

Full text

APA, Harvard, Vancouver, ISO, and other styles

16

Semião, Andrea J. C. "Removal of adsorbing estrogenic micropollutants by nanofiltration membranes in cross-flow : experiments and model development." Thesis, University of Edinburgh, 2011. http://hdl.handle.net/1842/5742.

Full text

Abstract:

Nanofiltration (NF) can be used in water and wastewater treatment as well as water recycling applications, removing micropollutants such as hormones. Due to their potential health risk it is vital to understand their removal mechanisms by NF membranes aiming at improving and developing more effective and efficient treatment processes. Although NF should be effective and efficient in removing small molecular sized compounds such as hormones, the occurrence of adsorption onto polymeric membranes results in performances difficult to predict and with reduced effectiveness and efficiency. This stud

APA, Harvard, Vancouver, ISO, and other styles

17

Anderson, Malin. "Dynamics of phosphorus transport and retention in a wetland receiving drainage water from agricultural clay soils." Thesis, Linköpings universitet, Ekologi, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-68773.

Full text

Abstract:

A constructed wetland (0.08 ha) receiving drainage water from a small agricultural catchment (22 ha) with clay soil, was investigated with respect to phosphorus dynamics and retention. The aim was to evaluate the function of the wetland with respect to phosphorus retention, and relate that to gross sedimentation as measured with sediment traps. Hydraulic load and phosphorus retention were estimated for 2003-2010 based on monitoring data. Furthermore, water quality dynamics was studied during three intensive sampling periods of 3-5 days during 2010. For each period, phosphorus retention was cal

APA, Harvard, Vancouver, ISO, and other styles

18

Ahsan, Mustafa. "An investigation into gas flow and retention characteristics of coal seams for enhanced coalbed methane recovery and carbon dioxide storage." Thesis, Imperial College London, 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.428132.

Full text

APA, Harvard, Vancouver, ISO, and other styles

19

Coleman, Brady S. "Impact of Biochar Amendment, Hydraulic Retention Time, and Influent Concentration on N and P Removal in Horizontal Flow-Through Bioreactors." Thesis, Virginia Tech, 2018. http://hdl.handle.net/10919/81880.

Full text

Abstract:

The advent of industrial, fertilizer-intensive agriculture during the 20th century has promoted export of anthropogenic nutrients, spurring degradation of ecosystem biodiversity and water quality. Exported nitrogen and phosphorus are recognized drivers of this deterioration, and require management. In the mid-1990s, denitrifying bioreactors (DNBRs), a subsurface, edge-of-field best management practice (BMP) that intercepts and treats agricultural drainage by supporting nitrate-attenuating denitrification with a saturated, carbon-filled substrate, were developed. Since then, their utility has e

APA, Harvard, Vancouver, ISO, and other styles

20

Forbes, Margaret G. "Phosphorus Retention and Fractionation in Masonry Sand and Light Weight Expanded Shale Used as Substrate in a Subsurface Flow Wetland." Thesis, University of North Texas, 2002. https://digital.library.unt.edu/ark:/67531/metadc3183/.

Full text

Abstract:

Constructed wetlands are considered an inefficient technology for long-term phosphorus (P) removal. The P retention effectiveness of subsurface wetlands can be improved by using appropriate substrates. The objectives of this study were to: (i) use sorption isotherms to estimate the P sorption capacity of the two materials, masonry sand and light weight expanded shale; (ii) describe dissolved P removal in small (2.7 m3) subsurface flow wetlands; (iii) quantify the forms of P retained by the substrates in the pilot cells; and (iv) use resulting data to assess the technical and economic feasibil

APA, Harvard, Vancouver, ISO, and other styles

21

Frampton, Andrew. "Stochastic analysis of fluid flow and tracer pathways in crystalline fracture networks." Doctoral thesis, KTH, Mark- och vattenteknik, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-11974.

Full text

Abstract:

Understanding groundwater flow systems and how these control transport is an essential part in assessing the suitability of subsurface environments as hosts for storage of toxic waste. Therefore it is important to be able to integrate knowledge obtained from field characterisation of the subsurface with methods which can be used to evaluate and predict possible impact on surrounding environments.In this thesis I investigate the characteristics of flow and transport in discrete fracture networks by analysing Eulerian and Lagrangian descriptions within a stochastic framework. The analysis is con

APA, Harvard, Vancouver, ISO, and other styles

22

BrandÃo, Waldo Hosternes Peixoto. "FormulaÃÃo MatemÃtica para CÃlculo de VariaÃÃo de ConcentraÃÃo em Escoamento EstacionÃrio." Universidade Federal do CearÃ, 2011. http://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=6323.

Full text

Abstract:

FundaÃÃo Cearense de Apoio ao Desenvolvimento Cientifico e TecnolÃgico<br>Esta pesquisa tem como objetivo principal equacionar uma variaÃÃo de concentraÃÃo entre o afluente e o efluente em um sistema biofÃsico ou fÃsico-quÃmico. O referencial teÃrico utilizado se embasou em uma equaÃÃo diferencial de escoamento estacionÃrio, envolvendo uma cinÃtica quÃmica e uma dispersÃo longitudinal, em que haja nÃmero de dispersÃo e eficiÃncia suficientemente baixo, relacionadas a reatores. As cinÃticas quÃmicas abordadas foram do tipo Monod, de primeira ordem, de uma ordem qualquer e uma criada semelhante

APA, Harvard, Vancouver, ISO, and other styles

23

Lee, Sherman. "The effect of acute cigarette smoke exposure on regional pulmonary blood flow, volume, red cell transit and polymorphonuclear leukocyte retention in the rabbit lung." Thesis, University of British Columbia, 1985. http://hdl.handle.net/2429/24840.

Full text

Abstract:

Regional pulmonary blood flow and volume was measured in ten rabbits anesthetized with pentobarbital (30 mg/kg). Tracheostomy was performed and catheters were placed into the jugular vein and carotid artery. The cardiac ⁹⁹mtc output was measured using the indicator-dilution technique using Tc labelled RBC followed by an injection of radiolabelled macroaggregates (MAA) to mark regional blood flow. Measurements were made both before and after either exposure to cigarette smoke (3 cigarettes for ten minutes at 4 puffs/minute) or sham exposure to air. The animals were sacrificed and the lungs w

APA, Harvard, Vancouver, ISO, and other styles

24

Mukwevho, Mukhethwa Judy. "The Use of Design Expert in Evaluating The Effect of pH, Temperature and Hydraulic Retention Time on Biological Sulphate Reduction in a Down-Flow Packed Bed Reactor." Diss., University of Pretoria, 2020. http://hdl.handle.net/2263/79624.

Full text

Abstract:

Biological sulphate reduction (BSR) has been identified as a promising alternative technology for the treatment of acid mine drainage. BSR is a process that uses sulphate reducing bacteria to reduce sulphate to sulphide using substrates as nutrients under anaerobic conditions. The performance of BSR is dependent on several factors including substrate, pH, temperature and hydraulic retention time (HRT). In a quest to find a cost effective technology, Mintek conducted bench-scale tests on BSR that led to the commissioning of a pilot plant at a coal mine in Mpumalanga province, South Africa. This

APA, Harvard, Vancouver, ISO, and other styles

25

Castagna, Salvatore. "Thermo hydraulic behaviour of unstaturated salt aggregates." Doctoral thesis, Universitat Politècnica de Catalunya, 2007. http://hdl.handle.net/10803/6246.

Full text

Abstract:

En el siglo pasado se ha desarrollado una nueva energía: la nuclear. Su aplicación comprende tanto el campo militar como el campo civil. Unos de los aspectos más interesantes es el uso de esta energía para la producción de electricidad de uso civil. <br/>El combustible nuclear es de larga duración: unas barras de uranio pueden llegar a producir energía eléctrica durante una década aproximadamente. Sin embargo, a mediados del siglo pasado se planteó el problema de los residuos nucleares. Este problema es muy complejo por que, aunque la duración del combustible sea de una década, el periodo de d

APA, Harvard, Vancouver, ISO, and other styles

26

Hughes, Kevin Lewis William. "Optimisation of methane production from anaerobically digested cow slurry using mixing regime and hydraulic retention time." Thesis, University of Exeter, 2015. http://hdl.handle.net/10871/18869.

Full text

Abstract:

AD is regarded as a sustainable technology that could assist the UK Government meet internationally agreed GHG emission targets by 2050. However, the mature status of the technology is based on expensive systems that rely on high energy feedstock to be profitable. Meanwhile, the natural biodegradation of cow slurry is a recognised contributor to climate change despite having a relatively low CH4 potential because of the large volumes produced. Economic mixing is essential to the cost-effectiveness of farm AD but techniques applied are not always appropriate as slurry is a shear thinning thixot

APA, Harvard, Vancouver, ISO, and other styles

27

Odstrčílek, Jonáš. "Studie variant nakládání s dešťovými vodami v obci Vendryně." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2012. http://www.nusl.cz/ntk/nusl-225368.

Full text

Abstract:

This master’s thesis deals with management of rain waters in urban area of village Vendryně. It contents study with several variants which are optimized for the local conditions and consequently evaluated . Another part of thesis deals with balance of rain water management for standardized household.

APA, Harvard, Vancouver, ISO, and other styles

28

Zárubová, Kamila. "Návrh protipovodňových opatření v povodí toku Březnice." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2014. http://www.nusl.cz/ntk/nusl-226856.

Full text

Abstract:

This thesis deals with the flood control. In particular, the design of a set of small water reservoirs with retention effect (polders) and their effect on flood flows. The work is divided into two parts, the first part refers to the bachelor thesis. In this thesis is description of the catchment, rainfall-runoff process and the evaluation of the ratio. That was got the necessary information for the design of polders. This is an abbreviated repetition of the contents of the thesis, which is a continuation of this work. The second part deals with the specific design of two reservoirs, including

APA, Harvard, Vancouver, ISO, and other styles

29

Herůfek, Marek. "Vývoj metody pro hodnocení retenčních vlastností vegetačních střech." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2016. http://www.nusl.cz/ntk/nusl-240252.

Full text

Abstract:

This diploma thesis deals with the development of methods for evaluating retention features of green roofs. For the purpose of this thesis, a rainfall simulator was designed and various types of precipitation were examined. The thesis is divided into two main parts: a theoretical part and a practical part. In the theoretical part, the importance of water retention on green roofs is discussed. In addition, a physical theory related to this topic is included and various rainfall simulators used for scientific experiments in the Czech Republic and abroad are described. The practical part deals wi

APA, Harvard, Vancouver, ISO, and other styles

30

Galuška, Martin. "Návrh malé vodní nádrže." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2016. http://www.nusl.cz/ntk/nusl-240195.

Full text

Abstract:

Thesis develops a simplified design of water management and construction solution in the area of Bezmerov. In the theoretical part basic functional objects are briefly described. Work itself is based on evaluation of landscape morphology from delivered countour lines and geological analysis and following design solution for dry retention water reservoir. For drawing part will be used programs PowerCivil – in which will be created direction solution for body of the dam, flooded area and their cross-sections and horizontal cuts. These will be further processed in program AutoCAD. Retention effec

APA, Harvard, Vancouver, ISO, and other styles

31

Tong, Fuguo. "Numerical modeling of coupled thermo-hydro-mechanical processes in geological porous media." Doctoral thesis, KTH, Teknisk geologi och geofysik, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-12009.

Full text

Abstract:

Coupled Thermo-Hydro-Mechanical (THM) behavior in geological porous media has been a subject of great interest in many geoengineering disciplines. Many attempts have been made to develop numerical prediction capabilities associated with topics such as the movement of pollutant plumes, gas injection, energy storage, geothermal energy extraction, and safety assessment of repositories for radioactive waste and spent nuclear fuel. This thesis presents a new numerical modeling approach and a new computer code for simulating coupled THM behavior in geological porous media in general, and compacted b

APA, Harvard, Vancouver, ISO, and other styles

32

Kamal, Majd. "Potential for low temperature district heating system : Integrating 4th generation district heating system with existing technology." Thesis, Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:mdh:diva-35816.

Full text

Abstract:

This project presents a feasibility study and an investigation of the potential for low temperature district heating system in Västerås. The investigation treats integrations possibilities for 4GDH (4th Generation District Heating) in Kungsängens area in Västerås, which is undergoing a large-scale building-up and construction. The study is conducted for the company Mälarenergi AB. The advantages of 4GDH technology are identified and analyzed, where energy effectiveness and economic benefits aspects were concluded. Problems with existing technology and higher cooling demand expectations drive

APA, Harvard, Vancouver, ISO, and other styles

33

Mauerová, Martina. "Zdravotně technické instalace v obytné budově." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2017. http://www.nusl.cz/ntk/nusl-265525.

Full text

Abstract:

This Diploma thesis deals with design sanitation installation in a residential building in Prague. The theoretical part is aimed at determining the calculation of flow in the sup-ply duct according to standards. The work also focuses on the alternative solutions of the given specialization. The computational part and project includes a proposal sani-tary and storm sewer, water supply system and their connection to the current pipes. It is a residential building with four overground floors and with two underground floors.

APA, Harvard, Vancouver, ISO, and other styles

34

Fantin-Cruz, Ibraim. "Efeitos da formação e operação de um reservatório de pequena regularização na alteração da qualidade da água e do regime hidrológico na planície de inundação do Pantanal." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2012. http://hdl.handle.net/10183/62108.

Full text

Abstract:

Sabe-se que a formação de reservatórios altera a qualidade e a quantidade da água de montante e jusante e que a direção e a magnitude das alterações dependem de suas características construtivas, operacionais, morfométricas, bem como do regime hidrológico e climático da região. Porém, a maior parte deste conhecimento foi fundamentada em pesquisas de reservatórios com grande capacidade de regularização, que fazem parte da realidade do Pantanal, uma região que vem sendo impactada por um número cada vez maior de reservatórios com pequena capacidade de regularização, levantando questionamentos sob

APA, Harvard, Vancouver, ISO, and other styles

35

Westgren, Jakob, and Markus Sandsjö. "IPO Underpricing – Can it be predicted? : A quantitative research study of Swedish IPOs 1997-2011." Thesis, Internationella Handelshögskolan, Högskolan i Jönköping, IHH, Företagsekonomi, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:hj:diva-18327.

Full text

Abstract:

When a company sells shares of their business to the public for the first time, it is called an Initial Public Offering, IPO. The IPO is usually conducted by the issuing firm to raise capital for their future growth. Before the IPO the information about the issuing company is often limited and the investment in an IPO is associated with risks. The investors who choose to invest in an IPO are therefore usually compensated with a discount on the shares and often experience a first day positive return. This first day positive return is the definition of underpricing. If the majority of the IPOs a

APA, Harvard, Vancouver, ISO, and other styles

36

Meurer, Ismael. "Método do Perfil Instantâneo em amostras de solo homogêneas e estratificadas." Universidade de São Paulo, 2018. http://www.teses.usp.br/teses/disponiveis/11/11140/tde-10102018-162922/.

Full text

Abstract:

O conhecimento das propriedades hidráulicas do solo referentes ao movimento da água é essencial para a solução de problemas que envolvem a poluição de mananciais e aquíferos, a conservação da água e o controle da erosão. Neste contexto, as propriedades hidráulicas do solo de maior importância são a curva de retenção da água no solo, a condutividade hidráulica e a difusividade hidráulica em função do conteúdo de água no solo. O método do perfil instantâneo é um dos métodos mais utilizados na determinação da condutividade hidráulica do solo não saturado, no entanto, a suposição do gradiente de p

APA, Harvard, Vancouver, ISO, and other styles

37

Kposowa, Kaitor. "The Financial Success of Franchise Film Sequels: An Exploration of the Relationship of Budget, Personnel Factors, and Reviews with Sequel Return on Investment." Ohio University / OhioLINK, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1429187596.

Full text

APA, Harvard, Vancouver, ISO, and other styles

38

Fokkema, Maaike. "Spårämnestillsatsers påverkan på biogasproduktionen vid anaerob rötning av avloppsslam : Behovet av spårämnen vid slamrötning på Karlstads reningsverk." Thesis, Karlstads universitet, Institutionen för miljö- och livsvetenskaper (from 2013), 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-68462.

Full text

Abstract:

Sverige har som mål att endast använda fossilfria bränslen inom fordonsflottan till år 2030. Ett av dessa fossilfria bränslen är biogas som bland annat produceras på Karlstads reningsverk, Sjöstadsverket. Sjöstadsverket planerar att bygga ut sin slammottagningsstation för att kunna ta emot mer slam. I samband med detta finns det ett intresse av att undersöka effektiviseringsmöjligheter inom biogasproduktionen. Ett vanligt förekommande sätt att öka biogasproduktionen är genom tillsatser av olika spårämnen. I detta arbete har därför tillsatser av spårämnena järn, kobolt, nickel och magnesium und

APA, Harvard, Vancouver, ISO, and other styles

39

El-Tayeb, El-Sayed Mohamed. "Rétention d'alpha-oléfinésulfonates de sodium dans un sable argilo-calcaire : étude expérimentale et modélisation du transport en présence de cations divalents et d'asphalte." Vandoeuvre-les-Nancy, INPL, 1994. http://www.theses.fr/1994INPL149N.

Full text

Abstract:

L’utilisation de tensioactifs de type alpha-oléfinésulfonate dans les procédés de récupération améliorée du pétrole apparait comme une solution à des gisements pétroliers possédant une eau de gisement moyennement salée contenant des cations divalents. L’optimisation du procédé passe par l'élaboration d'un modèle de transport traduisant l'évolution de la concentration du tensioactif, donc de son efficacité, lors de son transit au sein du milieu poreux que constitue le gisement. La modélisation s'est appuyée sur une méthode expérimentale reposant sur la chromatographie réactive, qui permet à par

APA, Harvard, Vancouver, ISO, and other styles

40

Pavlík, Ondřej. "Matematické modelování retenčních objektů městského odvodnění." Doctoral thesis, Vysoké učení technické v Brně. Fakulta stavební, 2014. http://www.nusl.cz/ntk/nusl-233818.

Full text

Abstract:

This work deals with the use of 3D mathematical models of fluid in water management practice. Using 3D mathematical model was assessed retention tank Jeneweinova, which is situated on a sewer network of the city of Brno and is an important object of urban drainage. Retention basin designed to keep overflow from CSO chambers to Svratka and Svitavský náhon during storm events. Retention tank Jeneweinova is suitable for the assessment, because tank was designed bassed the Master Plan drainage of Brno using 1D mathematical model. Another factor was the physical model, which was build in LVV Vin FA

APA, Harvard, Vancouver, ISO, and other styles

41

Handley, Junella. "RETAINING QUALIFIED TEACHERS THROUGH SCHOOL-BASED INDUCTION: A STUDY OF ELEMENTARY SCHOOLS IN TWO PUBLIC SCHOOL DISTRICTS IN FLO." Doctoral diss., University of Central Florida, 2007. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/4343.

Full text

Abstract:

The purpose of this study was to examine teacher induction strategies and effectiveness at the school level, specifically focusing on how the principal designed and implemented induction activities. It also investigated if the following factors influenced teacher retention: (a) number of instructional staff members, (b) number of first-year teachers, (c) number of second-year teachers, (d) number of third-year teachers, (e) principal's gender, (f) principal's age, (g) principal's highest degree earned, (h) principal's total years in education, (i) principal's years in an instructional position

APA, Harvard, Vancouver, ISO, and other styles

42

Liimatainen, H. (Henrikki). "Interactions between fibres, fines and fillers in papermaking:influence on dewatering and retention of pulp suspensions." Doctoral thesis, University of Oulu, 2009. http://urn.fi/urn:isbn:9789514292101.

Full text

Abstract:

Abstract Interactions between the components of papermaking suspensions (e.g. fibres, fillers, fines and polymers) have a remarkable effect on various unit processes in papermaking. The filterability of fibre suspensions, which is a crucial property for example in paper sheet forming and solid recovery, is also known to be depended on particle interactions. However, due to the complex nature of the interactions, the role of these phenomena in fibre suspension filtration is still not fully understood. The focus of this thesis was to find out how phenomena associated to fibre flocculation, fibre

APA, Harvard, Vancouver, ISO, and other styles

43

Sjökvist, Niclas. "Realizing a 32-bit Normally-Off Microprocessor With State Retention Flip Flops Using Crystalline Oxide Semiconductor Technology." Thesis, Linköpings universitet, Elektroniska komponenter, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-100812.

Full text

Abstract:

Power consumption is one of the most important design factors in modern electronic design. With a large market increase in portable battery-operated devices and push for environmental focus, it is of interest for the industry to decrease the power consumption of modern chips as much as possible. However, as circuits scale down in size the leakage current increases. This increases the static power consumption, and in future technologies the static power is expected to make up most of the overall power consumption. Power gating can decrease static power by isolating a circuit block from the powe

APA, Harvard, Vancouver, ISO, and other styles

44

Dussaussoy, Benjamin. "Application des tensioactifs biosourcés à la remédiation des sols pollués aux hydrocarbures." Thesis, Compiègne, 2021. http://www.theses.fr/2021COMP2605.

Full text

Abstract:

La compréhension du transport et des interactions de tensioactifs biosourcés en milieu poreux présente un grand intérêt dans les applications environnementales, en particulier pour le contrôle du procédé de dépollution des sols par lavage. L’objectif de ces travaux de thèse est d’étudier le rôle de l’hétérogénéité physique et de l’hydrodynamique du milieu ainsi que de l’impact des propriétés des molécules tensioactives sur les mécanismes de transport et de rétention des tensioactifs dans les milieux poreux saturés en vue de leur dépollution. Une démarche de sélection progressive des produits a

APA, Harvard, Vancouver, ISO, and other styles

45

Pineault, Isabelle. "Gas flow hydrodynamics in an oxygen delignification retention tower." Thesis, 1999. http://hdl.handle.net/2429/9318.

Full text

Abstract:

Gas flow hydrodynamics were characterized as a function of pulp suspension concentration in a laboratory-scale residence tower. Three kraft pulps were studied: never-dried brown stock (kappa 33), a fully bleached kraft pulp (88-89% brightness) that never had been dried, and a dried and reslurried fully bleached kraft pulp (88-89% brightness). The following experiments were performed to charaterize gas flow in pulp retention towers. First, gas flow in a narrow rectangular tower was characterised as a function of suspension mass concentration by calculating the bubble rising velocity. Thes

APA, Harvard, Vancouver, ISO, and other styles

46

"Assessment of flow conditions in a new vortex-type stormwater retention pond using a physical model." Thesis, 2016. http://hdl.handle.net/10388/ETD-2016-03-2459.

Full text

Abstract:

The stormwater retention pond is a best management practice used for the improvement of runoff water quality before it discharges into larger surface waterbodies. A vortex-type retention pond, called the Nautilus PondTM, is a new design approach for stormwater retention ponds that is expected to produce an internal flow pattern in the pond that is more conducive to removal of sediments from runoff. Since many existing stormwater retention ponds were originally designed only for flood control, most of the ponds are subject to large dead zones, severe short-circuiting and short retention times,

APA, Harvard, Vancouver, ISO, and other styles

47

Li, Guangquan Loper David E. "Laboratory simulation of solute transport and retention in a Karst aquifer." 2004. http://etd.lib.fsu.edu/theses/available/etd-11092004-221048.

Full text

Abstract:

Thesis (Ph. D.)--Florida State University, 2004.<br>Advisor: Dr. David E. Loper, Florida State University, College of Arts and Sciences, Geophysical Fluid Dynamics Institute. Title and description from dissertation home page (viewed Jan 14, 2005). Includes bibliographical references.

APA, Harvard, Vancouver, ISO, and other styles

48

WEN-CHI, CHEN, and 陳雯琦. "Elementary Students’ Self Efficiency to Flow Effect and Learning Retention : Three-Character Scripture Card Games." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/95008162082447694862.

Full text

Abstract:

碩士<br>國立臺灣師範大學<br>創造力發展碩士在職專班<br>98<br>The purpose of this piece of research is to discuss the effects on the Flow and the learning retention of students with individual self efficiency. The experiment-correlated method is applied on 209 students in the higher grades in primary schools, in order to understand and analyze the differences of flow experiences and learning retention through playing card games. Among all the 209 participants, 108 students play the three-character one continuous line game while the remaining 101 ones play the three-character heart attack game. Before any experimen

APA, Harvard, Vancouver, ISO, and other styles

49

Rodriguez-Pin, Elena. "Grain-scale mechanisms of particle retention in saturated and unsaturated granular materials." Thesis, 2010. http://hdl.handle.net/2152/ETD-UT-2010-12-2537.

Full text

Abstract:

The phenomenon of particle retention in granular materials has a wide range of implications. For agricultural operations, these particles can be contaminants transported through the ground that can eventually reach to aquifers, consequently contaminating the water. In oil reservoirs, these particles can be clays that get detached from the rock and migrate with the flow after a change of pressure, plugging the reservoir with the consequent reduction in permeability. These particles can also be traceable nanoparticles, introduced in the reservoir with the purpose of identifying bypassed oil. For

APA, Harvard, Vancouver, ISO, and other styles

50

White, William James. "Retention of sediment and phosphorus in forested streamside management zones of the Georgia Piedmont under simulated overland flow conditions." 2003. http://purl.galileo.usg.edu/uga%5Fetd/white%5Fwilliam%5Fj%5F200308%5Fms.

Full text

APA, Harvard, Vancouver, ISO, and other styles

We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!