Dissertations / Theses: 'Comparison of waxes'

1

Šmatelka, Jakub. "Optimalizace technologie voskových modelů ve firmě Alucast." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2014. http://www.nusl.cz/ntk/nusl-231529.

Full text

Abstract:

This diploma thesis deals with the problem of wax patterns manufacturing in investment casting technology (lost wax process). This technology is very sensitive to the exact execution in each phase of the whole process, from concept design up to the final casting expedition. During most operations, dimensional changes occur, which is affecting the accuracy of the final casting. No matter how big these changes are, but especially if they occur with the least variance. One of the first phases in this technology is making wax patterns. There are several ways of making the wax patterns and this thesis is describing two different methods used in the Alucast foundry. One is based on using “soft waxes” enabling using low pressure machines, the other one on the “hard waxes” where the injection machine with higher presses is being used (SOM). These two above mentioned technologies are compared in this work.

APA, Harvard, Vancouver, ISO, and other styles

2

Liu, James Cheng. "Comparison of measured and transformed directional wave spectra using a linear refraction model." Thesis, Monterey, California : Naval Postgraduate School, 1990. http://handle.dtic.mil/100.2/ADA247157.

Full text

Abstract:

Thesis (M.S. in Meteorology)--Naval Postgraduate School, December 1990.
Thesis Advisor(s): Thornton, Edward B. Second Reader: Williams, Roger T. "December 1990." Description based on title screen as viewed on March 31, 2010. DTIC Identifier(s): Linear Refraction Model. Author(s) subject terms: Ocean Waves, Directional Spectra, Wave Refraction. Includes bibliographical references (p. 82-83). Also available in print.

APA, Harvard, Vancouver, ISO, and other styles

3

Bruce, Matthew F. "A comparison and study of the Born and Rytov expansions." Thesis, This resource online, 1993. http://scholar.lib.vt.edu/theses/available/etd-11102009-020128/.

Full text

APA, Harvard, Vancouver, ISO, and other styles

4

Podo, Smardie D. "Comparison of layering effects in the propagation of transient planar stress waves." Thesis, Georgia Institute of Technology, 1993. http://hdl.handle.net/1853/18378.

Full text

APA, Harvard, Vancouver, ISO, and other styles

5

Newyear, Karl D. "A comparison of theory with laboratory and field observations of wave propagation in grease ice /." Thesis, Connect to this title online; UW restricted, 1997. http://hdl.handle.net/1773/11057.

Full text

APA, Harvard, Vancouver, ISO, and other styles

6

Syk, Niklas. "The profitability of investing in a university degree : a comparison between wages and educations." Thesis, Jönköping University, JIBS, Economics, 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:hj:diva-949.

Full text

Abstract:

Sweden has during the past decades increased the number of university students. This increase has made some jobs to increase its requirements on their new recruits. This means that highly educated people have to get jobs that they are overqualified for. With an increase in the number of educated people it is possible that wages decreases. This thesis investigates if today’s wages are high enough to finance educations that jobs require. The empirical work is a comparison of wages in five jobs that require a university degree, which are: civil engineer, business administration, law, nurse, and high school teacher. These five wages will be compared to the wage of a manufacturing worker, without an education. The goal is to calculate if a person with a university degree will earn a greater aggregate income than someone without a degree at the age of 65. Further, the possible change in the expected utility of a business administration degree, due to the introduction of the new educational system (the Bologna declaration) will be analyzed. The result shows that three out of the five jobs observed generates an income greater than the compared job that does not require an education.

Sverige har under de senaste årtionden ökat antalet högskolestudenter markant. Denna ökning har bidragit till att vissa arbeten nu kräver en högre utbildning och högre krav på nyanställda. Detta leder till att högutbildade personer måste söka arbeten där man är överkvalificerad. Med en större tillgång på högutbildade finns möjligheten att lönerna sjunker. Denna uppsats utreder om dagens löner är tillräckligt höga för att finansiera de studier som krävs för respektive yrke. Den empiriska undersökningen är en jämförelse mellan löner i fem yrken som kräver en högskoleutbildning, vilka är: civilingenjör, företagsekonom, jurist, sjuksköterska och gymnasielärare. Dom här fem yrken kommer att jämföras mot lönen för en fabriksarbetare, som inte kräver någon utbildning. Målet är att se om de högutbildade kommer att ha en högre aggregerad inkomst vid 65 års ålder. Det kommer också att göras en undersökning om introduktionen av det nya högskolesystemet (Bologna deklarationen), kommer att ha för påverkan på förtjänsten av en högskoleexamen. Resultatet visar att tre av de fem examinerade yrken genererar en inkomst högre än det jämförda yrket utan utbildning.

APA, Harvard, Vancouver, ISO, and other styles

7

Oh, Eunjin. "Wage returns for post-secondary education : a comparison for selected programs by levels of education and industry type /." free to MU campus, to others for purchase, 2000. http://wwwlib.umi.com/cr/mo/fullcit?p9988688.

Full text

APA, Harvard, Vancouver, ISO, and other styles

8

Rizzo, Clarissa. "Comparison between Global Hydrological Models and observations: trend and drought analysis in England and Wales." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2019.

Find full text

Abstract:

Global hydrological models (GHMs) have been widely used in scientific studies to describe the hydrological cycle at large scale. Many improvements have been made to these models, e.g., to include human influences, such as reservoir operations, water uses and land cover changes. Given these enhancements, the question is now how well these models can reflect trends and drought characteristics found in streamflow observations in relatively small catchments, where flow might be altered by different (local) human influences. To answer this question, this study compares discharge simulated data from six different GHMs with observations in 189 gauging stations around England and Wales. A common characteristic of the considered catchments is their relatively small size (10-10000 km2) and part of the challenge consists in studying the ability of the models to describe hydrological conditions and human influences at such small scale. The selected catchments consist of a mix of catchments with near-natural flow as well as catchments with different human influences, such as groundwater abstraction and reservoir management. For all catchments, discharge trends and drought event characteristics have been determined for both observed and modelled time series and the outcomes have been compared. Results show that GHMs (especially the course-resolution ones) simulate catchments areas larger than the observed ones. This overestimation influences simulated streamflow and impacts on the results of the trend and drought analyses. The identified trends and drought characteristics, in fact, vary among GHMs and from GHMs to observations. It is evident the impact of groundwater abstraction emerging in the most affected regions, whereas the influence of the other human activities on drought characteristics is not so clear.

APA, Harvard, Vancouver, ISO, and other styles

9

Louwers, Petrus Rudolfus Cornelis. "A comparison of two citizen initiatives in contrastingflood risk management systems,the Netherlands and Wales." Thesis, Blekinge Tekniska Högskola, Institutionen för fysisk planering, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:bth-10507.

Full text

Abstract:

This master thesis analyses two citizen initiatives; the flood action plan of LLanddowror, Wales and the mount plan of the Overdiepse Polder, the Netherlands. It uses the collaboration theory, the ladder of citizen participation, cross-scale interaction and community resilience to explain the role of citizens in flood risk management. The aim of this research is to see how governments facilitate citizens and if culture and context influence the roles of governments and citizens. The Welsh system is bottom-up with an increasing role for market and civil society to take responsibilities. Citizens generally insure themselves against flood damage. The Welsh system has enhanced community engagement and creating awareness is important. Dealing with big strategic issues seems to be difficult. The Dutch flood governance is more top-down which means less room for citizen initiatives. Citizens are not insured for flood damage since the government profiles itself responsible for floods therefore awareness amongst citizens is low. The Dutch system has benefits when dealing with large scaled projects but has issues with creating awareness as well as engaging citizens in water development. Assumingly there are opportunities for both countries to learn from each others’ way of dealing with flood risk management and citizen engagement.

APA, Harvard, Vancouver, ISO, and other styles

10

Asabere, Philip. "COMPARISON OF DISPERSION CURVES ACQUIRED USING MULTICHANNEL ANALYSIS OF SURFACE WAVES WITH VARIOUS STRIKER PLATE CONFIGURATIONS." Master's thesis, Temple University Libraries, 2016. http://cdm16002.contentdm.oclc.org/cdm/ref/collection/p245801coll10/id/368445.

Full text

Abstract:

Civil Engineering
M.S.C.E.
There is growing appreciation and research regarding geophysical methods to evaluate near surface soil properties in geotechnical engineering. Geophysical methods are generally non-destructive test (NDT) methods that do not necessitate traditional sampling of soils. Instead, they rely on application of input signals and deduction of soil properties from the measured response of the domain. Geophysical methods include various seismic, magnetic and nuclear techniques applied at the surface and/or subsurface within boreholes. Surface seismic methods, which include Multichannel Analysis of Surface Waves (MASW), are increasing in usage for geotechnical engineering purposes to evaluate stiffness properties of soils. MASW typically involves using a hammer to impact a base plate (also referred to as a striker plate) to transmit surface waves into the ground. These waves propagate through the underlying soils at a site and are received by an array of geophones placed on the ground surface. The manner in which the waves propagate is primarily influenced by soil stiffness, particularly against shear. Therefore, the signals recorded during an MASW survey can be analyzed to estimate the shear stiffness of the soils at a site, a parameter that is extremely important for seismic-related engineering purposes (e.g., site amplification, liquefaction, etc.). Aluminum plates are routinely used in a large number of MASW studies as a striker plate to couple the energy from a sledgehammer blow to the underlying soil layers. Various researchers have postulated that the material make-up of the striker plate has an effect on the frequency of the generated waves and, for that matter, the depth achieved with a typical MASW survey. For example, a less stiff material such as ultra-high-molecular-weight (UHMW) polyethylene is often recommended to increase low frequency energy of the input surface wave relative to aluminum. However, very limited research work has been performed in this area to systematically ascertain the effects of modifications to the striker plate material. Due to the limited direct research related to striker plates, MASW was utilized in this study to measure the dispersion curve resulting from MASW at various sites in the Philadelphia metropolitan area. Different striker plate configurations were used during testing to systematically quantify their effects on typical MASW results. The proposed striker base plate configurations included a one (1.0) inch thick aluminum plate, a one (1.0) inch thick aluminum plate over additional rubber mats of varying thickness, and multiple ultra-high-molecular-weight (UHMW) polyethylene plates of various thicknesses. The purpose of this testing was to examine the performance of each configuration, particularly at the low frequency range of the dispersion results. Also efforts were made to qualitatively access the durability of the configurations with respect to long term exposure to impact load.
Temple University--Theses

APA, Harvard, Vancouver, ISO, and other styles

11

Ordoyno, Hannah. "Access to knowledge and the formation of lawyer-identity : a Bernsteinian comparison of undergraduate law degrees at two UK universities of different status." Thesis, University of Nottingham, 2016. http://eprints.nottingham.ac.uk/31342/.

Full text

Abstract:

In order to investigate students’ success and experience at university, this thesis compared students’ access to knowledge through the curriculum, teaching and learning (pedagogy) in Law undergraduate degrees at two UK universities of different status: a higher status ‘pre-1992’ Russell Group University (‘Global’) and a lower status ‘post-1992’ university, which is a member of the Million + Group (‘Local’). Lower-status universities recruit more students from unrepresented groups: students from ethnic minorities; those with disabilities; those who have been in local authority care; mature students; and, students from lower socio-economic groups. These students are often judged to be at a further disadvantage because their universities’ positions in higher education league tables gives the impression that the universities they are attending offer a lower standard of education than the higher status universities. This research focuses upon students’ experiences, at different universities, during their degree and, as such, contributes to the limited body of research about factors which affect student retention and success in higher education. This research built on a three-year ESRC-funded research project entitled ‘Pedagogic Quality and Inequality in University First Degrees’ (2008-2012) which used a theoretical framework drawn from the sociologist Basil Bernstein to analyse curriculum and pedagogy in sociology-related social science disciplines in four universities in different positions in higher education league tables. This study employed the same broad conceptual framework and some of the methods of the ESRC project for a smaller-scale study exploring how access to knowledge plays out in the discipline of law in two different status universities. The research presented here was a longitudinal comparative case study of an undergraduate Law degree. At each university, curriculum documents for seven core modules were analysed to highlight the similarities and differences in curriculum content and pedagogical processes; two tutorial sessions were observed in consecutive years and tutors (4) interviewed before and after the tutorial; six students (12 students) were recruited and interviewed during each year of their degree course (three times altogether). A biographical life grid was completed during the first year of the students’ course to provide a biography of each student. Despite the Law Society dictating a core curriculum for a qualifying law degree, the degrees were differently classified and framed. The main differences that emerged are expressed as three dichotomies (1) vocational/academic: Local offered ‘practical insights’ by including in the curriculum practical, work-based modules and learner centred teaching and has strong links with the legal profession. It offered a greater variety in assessment methods and more contact time (2) formal/informal relations: relationships between staff and students at Local were more informal and friendly than at Global where a clear, formal hierarchy between staff and students exists (3) independence/dependence: Global expected more independence of its students than Local where they were guided through material. Students at Local appeared to have higher levels of confidence when contributing to taught sessions and when using their legal knowledge in a professional environment, and project a sense of belonging within their departments and with other legal scholars. Students and staff at Local projected an identity as ‘future lawyers’ and vocational education, placements and acceptance onto professional legal training courses were highly regarded. In contrast to this, students, and particularly staff, at Global projected an identity as ‘academic, critical thinkers’ which does not relate to actual practice- vocational training and placements are extra-curricular, post-graduate concerns. Only one of the students at Global chose to pursue a career in law. In conclusion, I argued that students at Global and Local were being advantaged and disadvantaged by different elements of the pedagogy and curriculum.

APA, Harvard, Vancouver, ISO, and other styles

12

Ozanne, Francoise. "Performance of a Boussinesq model for shoaling and breaking waves : a comparison with large scale laboratory data." Thesis, University of Plymouth, 1998. http://hdl.handle.net/10026.1/471.

Full text

Abstract:

In this thesis, a nonlinear model predicting hydrodynamics data for waves shoaling and breaking on a beach is reproduced and extensively tested with laboratory data. The model is based on the 1D Boussinesq equations as derived by Madsen et al. (1991) and Madsen and Sorensen (1992), with the free surface elevation and the depth-integrated velocity as variables. It allows slowly varying bathymetries and contains additional high order terms to improve the frequency dispersion for shorter wave periods, and thus also to improve the shoaling properties of the model. Wave breaking is modelled using the concept of a surface roller as formulated by Schäffer et al. (1993). It is assumed that bottom friction is negligible. A large scale laboratory experiment (Supertank), designed in particular to obtain data to test the validity of wave propagation models, provides the wave and current data. Wave evolution over a complex bathymetry is examined for 4 cases. The data include conditions for long and short waves, and regular and irregular waves. During the model evaluation, emphasis is put on the study of parameters of importance to sediment transport, including (orbital) velocity, undertow and wave shape prediction. The latter encompasses velocity and elevation skewness, kurtosis and asymmetry. It is found that, despite an overestimation of the depth-averaged horizontal velocity in some cases, the predicted velocity moments and undertow are in good agreement with the data. Using a bispectral analysis, it is shown that the nonlinear transfers of energy amongst the low order harmonics are well reproduced, but that errors are introduced in the treatment of the high order super-harmonics. As a result, the short waves tests are found to yield better results than those for long waves. A sensitivity analysis on the free parameters introduced in the simulation of wave breaking is carried out. It appears that the results are mostly sensitive to the critical xv avve fi-ont slope OB , and in particular that the elevation and velocity skewness and kurtosis predictions are very sensitive to this parameter.

APA, Harvard, Vancouver, ISO, and other styles

13

Alshahrani, Mohammed A. "Police powers, legal rights and pre-trial procedures in Saudi Arabia : a comparison with England and Wales." Thesis, University of Hull, 2005. http://hydra.hull.ac.uk/resources/hull:5606.

Full text

Abstract:

The exercise of police powers is subject to rules and guidelines, and the event of police powers has occasioned considerable controversy since the inception of the 'new police'. On the one hand, the police clearly need powers to stop people on the street if they are suspected of a crime, to enter people's houses if they suspect that they are hiding stolen goods or firearms and to arrest people they suspect of a crime. They need to be able to interview suspects in the police station and may have to hold suspects in cells. On the other hand, individual citizens need to be able to carry on with their everyday lives without risking being stopped on the streets, having their homes ransacked by the police and being arrested and taken to the police station. Suspects must be protected from torture, brutality and the extraction of false confessions. Special protection may be afforded to vulnerable groups such as the young and mentally ill. Legislation on police powers, therefore, must balance conflicting needs. Saudi Arabia the Stop, Arrest, Detention and Custody Regulation (SADC) was set up in 1983. The regulation provided powers relating to stop and search, arrest, detention. interviewing, and the investigation of crimes It seeks to protect suspects from the abuse of such powers by granting to suspects certain rights and protections. In practice, however, the balance between the use of the powers and suspects' rights is different. The police appear to exceed their powers as they provided and the safeguards are ignored. Therefore, the question is, how do the pre-trial procedures work in practice? No research has been done to examine the pre-trial process in practice in Saudi Arabia. Data collection for the study as carried out using three methods: questionnaire, observation and documentary data from police files. In this research variations have been found between the official regulation and actual police practice.

APA, Harvard, Vancouver, ISO, and other styles

14

Im, Jeong Sook. "Comparison of the Korteweg-de Vries (KdV) equation with the Euler equations with irrotational initial conditions." The Ohio State University, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=osu1281472399.

Full text

APA, Harvard, Vancouver, ISO, and other styles

15

Medvedev, Alexander S., Hiromu Nakagawa, Chris Mockel, Erdal Yiğit, Takeshi Kuroda, Paul Hartogh, Kaori Terada, et al. "Comparison of the Martian thermospheric density and temperature from IUVS/MAVEN data and general circulation modeling." AMER GEOPHYSICAL UNION, 2016. http://hdl.handle.net/10150/614739.

Full text

Abstract:

Newly released Imaging Ultraviolet Spectrograph/Mars Atmosphere and Volatile EvolutioN (IUVS/MAVEN) measurements of CO2 density in the Martian thermosphere have been used for comparison with the predictions of the Max Planck Institute Martian General Circulation Model (MPI-MGCM). The simulations reproduced (within one standard deviation) the available zonal mean density and derived temperature above 130 km. The MGCM replicated the observed dominant zonal wave number 3 nonmigrating tide and demonstrated that it represents a nonmoving imprint of the topography in the thermosphere. The comparison shows a great dependence of the simulated density and temperature to the prescribed solar flux, atomic oxygen abundances and gravity wave effects, with the former two being especially important in the thermosphere above 130 km and the latter playing a significant role both in the mesosphere and thermosphere.

APA, Harvard, Vancouver, ISO, and other styles

16

Ali, Z. "The application of the Mareva injunction in England, Wales, Malaysia, Singapore, Australia and New Zealand : a legal comparison." Thesis, Swansea University, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.635748.

Full text

Abstract:

A Mareva injunction which was, in 1999, renamed as a freezing order, is a type of interlocutory injunction. It was created in 1975 with the purpose of restraining a debtor from dissipating his assets until a judgement is made against him. Since then, Mareva injunction has been progressively developing and adopted to differing degrees by other jurisdictions. This thesis will focus on the development of the Mareva injunction and the main impacts that the development has caused on the scope and fundamental acceptance of this injunction in England and Wales. In comparison, its acceptance and practice in Malaysia, Singapore, Australia and New Zealand, will be discussed in order to identify similarities and differences, whereby the main difference can be seen in the application of the worldwide Mareva injunction.

APA, Harvard, Vancouver, ISO, and other styles

17

Plessis, J. K. "An exploration and comparison of parents' and children's attitudes to mathematics in English medium schools in South Wales." Thesis, Swansea University, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.638542.

Full text

Abstract:

Children’s attitudes to mathematics are complex and multifaceted in nature and influenced by wider socio-cultural factors. Parents are one such important socio-cultural influence. It has often been stated that parents are children’s first teachers and home is their first school. Consequently, parents may exert, even if unwittingly, a substantial influence on their children’s attitudes towards mathematics (Cockcroft, 1982). Hence, this study explores and compares the inter-related and multifaceted nature of the parents’ and children’s attitudes to mathematics using social, cognitive and motivational variables. This thesis uses the review of literature to construct a Unified Model of Attitudes to Mathematics (UMAM) to facilitate an insight into the intra- and inter-related nature of student and parent variables. Self-efficacy provided a central interpretative and integrative theoretical framework for explaining the nature and relationships between variables. Self-efficacy beliefs are people’s judgements of their “capabilities to organise and execute the courses of action required to produce given attainments” (Bandura, 1997, p.3). Thus, it was hypothesised that self-efficacy variables would serve a predictive and mediational role. This study was largely exploratory and was conducted using a two-phase sequential mixed-methods design. During the first phase as analytic, relational survey was used to explore and compare children’s (n = 794) and parents’ (n = 225) attitudes using quantitative methods. During the second phase, qualitative semi-structured group interviews were conducted with parents (n = 34) to help clarify, illustrate and elaborate quantitative relationships between parent variables and their latent structure. The results suggest that self-efficacy variables were most substantially related to the remaining variables for both parents and children. Many relationships between variables lost much of their predictive utility when self-efficacy variables were controlled. Analyses suggested that parent and student variables were related and that self-efficacy variables influenced a number of these relationships. An exploration of the latent structure of parents and children’s variables suggested some degree of similarity. Both parents and children’s attitudes appeared to decline as children progress from Year 7 to Year 10. A number of small gender differences were reported. Therefore, there was some evidence supporting the UMAM posited in this thesis. The impact of parents’ self-efficacy on parental involvement, and recommendations for facilitating parent involvement are discussed.

APA, Harvard, Vancouver, ISO, and other styles

18

Cave, Emma. "Killing or injuring the foetus born alive : a comparison of criminalisation measures in the US and England and Wales." Thesis, Coventry University, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.393657.

Full text

APA, Harvard, Vancouver, ISO, and other styles

19

Bateman, Ian J. "An economic comparison of forest recreation, timber and carbon fixing values with agriculture in Wales : a geographical information systems approach." Thesis, University of Nottingham, 1996. http://eprints.nottingham.ac.uk/11312/.

Full text

Abstract:

The research examines the financial and economic viability of transferring land presently under agricultural use into multipurpose farm-forestry in Wales. Three woodland benefit streams are examined in detail: the value of open-access recreation; the production of timber and; the net carbon storage generated by afforestation. Modelling of the spatial variability determining the production of these benefits is enhanced by the novel application of a geographical information system(GIS). Monetary evaluation of non-market recreation benefits is achieved by reference to both the contingent valuation and travel cost methods with prior studies being reviewed and new work presented. By contrast carbon storage benefits are valued purely by reference to the existing literature. Both of these analyses yield social values whereas our study of timber production produces both shadow and market valuations. Our GIS-based methodology is also applied to the modelling of agricultural values for the two major farm sectors (mainly sheep and mainly milk production) of the study area. Again both social and financial values are calculated. By comparison of the various values estimated across the above analyses we estimate both the financial and social values associated with potential transfers of land from conventional agriculture into farm-forestry. The financial values generated by our analysis support the present low levels of conversion out of agriculture. However, the social values estimated suggest that the present situation constitutes a significant market failure, particularly in the mainly sheep farming sector where cost benefit analysis suggests that substantial net social benefits could be generated through conversions into multi-purpose woodland.

APA, Harvard, Vancouver, ISO, and other styles

20

Alkharashi, Suliman Abdullah. "Human rights in the stage of criminal investigation : a comparison between law and practice in Saudi Arabia and England and Wales." Thesis, University of Sussex, 2015. http://sro.sussex.ac.uk/id/eprint/56824/.

Full text

Abstract:

This thesis is a comparative study of the pre-trial procedures of England and Wales and Saudi Arabia. Its aim is to show how the pre-trial procedures of Saudi Arabia could be re-designed in order to conform to both the standards set by international human rights and the norms of Shari'ah law and argues that there is much common ground between the two. It addresses the human rights relevant to pre-trial procedures and explores in-depth how these are expressed in international human rights legislation and in the current legislation of England and Wales with particular reference to the Police and Criminal Evidence Act (1984). They are contrasted with the relevant articles of the Code of Criminal Procedure 2001 (CCP) of Saudi Arabia. Individual rights such as the right to liberty, the right silence, the right to privacy, the right to bail and the right to an effective remedy are examined in depth and relevant case law is cited throughout. The history of pre-trial procedures and regulations in England and Wales and Saudi Arabia is explored in order to understand how these have developed into what exists today. The former is traced from the Norman period to the present day and the latter from the pre-Islamic era of the Arabian Peninsula. The actual practice of these procedures is explored comparatively through a fieldwork project involving semi-structured interviews with police officers and lawyers in England and police officers, police officers, prosecutors and lawyers in Saudi Arabia. The thesis ends with a thorough examination of how pre-trial procedures in Saudi Arabia could be regulated and monitored so as to bring them in line with the standards required by international human rights legislation and international practice and with the demands of Islamic law.

APA, Harvard, Vancouver, ISO, and other styles

21

Cowperthwaite, P. S., E. Berger, V. A. Villar, B. D. Metzger, M. Nicholl, R. Chornock, P. K. Blanchard, et al. "The Electromagnetic Counterpart of the Binary Neutron Star Merger LIGO/Virgo GW170817. II. UV, Optical, and Near-infrared Light Curves and Comparison to Kilonova Models." IOP PUBLISHING LTD, 2017. http://hdl.handle.net/10150/626064.

Full text

Abstract:

We present UV, optical, and near-infrared (NIR) photometry of the first electromagnetic counterpart to a gravitational wave source from Advanced Laser Interferometer Gravitational-wave Observatory (LIGO)/Virgo, the binary neutron star merger GW170817. Our data set extends from the discovery of the optical counterpart at 0.47-18.5 days post-merger, and includes observations with the Dark Energy Camera (DECam), Gemini-South/ FLAMINGOS-2 (GS/F2), and the Hubble Space Telescope (HST). The spectral energy distribution (SED) inferred from this photometry at 0.6 days is well described by a blackbody model with T approximate to 8300 K, a radius of R approximate to 4.5 x 10(14) cm (corresponding to an expansion velocity of v approximate to 0.3c), and a bolometric luminosity of L-bol approximate to 5 x 10(41) erg s(-1). At 1.5 days we find a multi-component SED across the optical and NIR, and subsequently we observe rapid fading in the UV and blue optical bands and significant reddening of the optical/ NIR colors. Modeling the entire data set, we find that models with heating from radioactive decay of Ni-56, or those with only a single component of opacity from r-process elements, fail to capture the rapid optical decline and red optical/NIR colors. Instead, models with two components consistent with lanthanide-poor and lanthanide-rich ejecta provide a good fit to the data; the resulting "blue" component has M-ej(blue) approximate to 0.01 M-circle dot and v(ej)(blue) approximate to 0.3c, and the "red" component has M-cj(red) approximate to 0.04 M-circle dot and v(cj)(red) approximate to 0.1 c. These ejecta masses are broadly consistent with the estimated r-process production rate required to explain the Milky Way r-process abundances, providing the first evidence that binary neutron star (BNS) mergers can be a dominant site of r-process enrichment.

APA, Harvard, Vancouver, ISO, and other styles

22

Dietzen, Gregory C. "Acoustic scattering from sand dollars (Dendraster Excentricus) : modeling as high aspect ratio oblate objects and comparison to experiment." Thesis, Online version of original thesis, 2008. http://hdl.handle.net/1912/2499.

Full text

APA, Harvard, Vancouver, ISO, and other styles

23

Yakhina, Gyuzel. "Experimental study of the tonal trailing-edge noise generated by low-reynolds number airfoils and comparison with numerical simulations." Thesis, Lyon, 2017. http://www.theses.fr/2017LYSEC008/document.

Full text

Abstract:

Le bruit tonal rayonné au bord de fuite des profils à faible nombre de Reynolds est un phénomène observé sur les ailes de drones ou micro-drones qui sont utilisés partout dans la vie quotidienne. La diminution de ce bruit va augmenter la survivabilité et l'efficacité des appareils dans le domaine militaire. De plus, cela va augmenter le champ des applications civiles et minimiser la pollution par le bruit. La réduction efficace du bruit est indispensable et, par conséquent, une compréhension complète du processus de rayonnement du bruit tonal du profil est nécessaire. Malgré le fait que des essais dédiés aient été réalisés depuis les années 70, il reste beaucoup de détails à expliquer. Le travail présenté est dédié à une étude expérimentale et analytique du bruit tonal. C'est une partie de collaboration entre l'Ecole Centrale de Lyon et Embry- Riddle Aeronautical University. Le but est de réaliser une caractérisation exhaustive des paramètres acoustiques et aérodynamiques du bruit tonal de bord de fuite d'un profil et de produire une base de données qui pourra être utilisée pour valider les simulations numériques réalisées dans le futur. Le profil symétrique NACA-0012 ainsi que le profil asymétrique SD7003 ont été testés pour une série d'angles d'incidence (de -10° à 10°) dans la soufflerie anéchoïque à jet ouvert de l'Ecole Centrale de Lyon pour des nombres de Reynolds modérés (0.6x105 < Rec < 2.6x105). Les mesures de pression aux parois et de pression acoustique en champ lointain pour différentes configurations ont permis d'observer une structure en escalier de la signature du bruit, de déterminer quelle face du profil a produit le bruit et de distinguer le rôle de la boucle de rétroaction. Des techniques supplémentaires de post-traitement comme l'analyse temps-fréquence ont montré l'existence de plusieurs régimes (un régime de commutation entre deux états, un régime d'une seul fréquence et un régime à plusieurs fréquences) de l'émission de bruit. L'analyse de bi-cohérence a montré qu'il y a des couplages nonlinéaires entre les fréquences. Une étude par l'anémométrie à fil chaud et par des techniques de visualisation de l'écoulement a montré que la formation d'une bulle de décollement est une condition nécessaire mais pas suffisante pour la génération du bruit. De plus, la localisation de la bulle est aussi importante et elle doit être suffisamment proche du bord de fuite. En outre, l'analyse de stabilité linéaire des résultats de simulations numériques a montré que des ondes de Tollmien-Schlichting sont transformées en ondes de Kelvin-Helmholtz dans la zone du décollement. Une prédiction analytique de l'amplitude des fréquences pures émises dans le champ lointain a été effectuée sur la base du modèle d'Amiet en supposant que le champ de pression pariétal est bidimensionnel. Les mesures de pression proches du bord de fuite du profil ont été prises comme données d'entrée. Les amplitudes prédites sont globalement en accord avec les mesures acoustiques. Après l'analyse de tous les résultats la description suivante du processus de rayonnement de sons purs peut être proposée. Les ondes de Tollmien-Schlichting qui se développent initialement dans la couche limite se transforment en ondes de Kelvin-Helmholtz le long de la couche de cisaillement de la bulle de décollement. Au bord de fuite du profil elles sont converties en ondes acoustiques qui forment un couplage fort avec les instabilités de couche limite plus en amont de l'écoulement, pilotant elles-mêmes le déclenchement de ces instabilités
The tonal trailing-edge noise generated by transitional airfoils is a topic of interest because of its wide area of applications. One of them is the Unmanned Air Vehicles operated at low Reynolds numbers which are widely used in our everyday life and have a lot of perspectives in future. The tonal noise reduction will increase the survivability and effectiveness of the devices in military field. Moreover it will enlarge the range of civil use and minimize noise pollution. The effective noise reduction is needed and therefore the complete understanding of the tonal noise generation process is necessary. Despite the fact that investigation of the trailing-edge noise was started since the seventies there are still a lot of details which should be explained. The present work is dedicated to the experimental and analytical investigation of the tonal noise and is a part of the collaboration project between Ecole Centrale de Lyon and Embry-Riddle Aerospace University. The aim is to conduct an exhaustive experimental characterization of the acoustic and aerodynamic parameters of the trailing-edge noise and to produce a data base which can be used for further numerical simulations conducted at Embry-Riddle Aerospace University. A symmetric NACA-0012 airfoil and a slightly cambered SD7003 airfoil at moderate angles of attack (varied from -10° à 10°) were tested in an open-jet anechoic wind tunnel of Ecole Centrale de Lyon at moderate Reynolds numbers (0.6x105 < Rec < 2.6x105). Measurements of the wall pressure and far-field acoustic pressure in different configurations allowed to observe the ladder-type structure of the noise signature, to determine which side produced tones and to distinguish the role of the acoustic feedback loop. Additional post-processing techniques such as time-frequency analysis showed the existence of several regimes (switching regime between two tones, one-tone regime and multiple-tones regime) of noise emission. The bicoherence analysis showed that there are non-linear relationships between tones. The investigation of the role of the separation area by hot-wire anemometry and flow visualization techniques showed that the separation bubble is a necessary but not a suficient condition for the noise generation. Moreover the location of the bubble is also important and should be close enough to the trailing edge. Furthermore the linear stability analysis of accompanying numerical simulation results showed that the Tollmien-Schlichting waves transform to the Kelvin-Helmholtz waves at the separation area. An analytical prediction of the tone levels in the far-field was done using Amiet's model based on the assumption of perfectly correlated sources along the span. The wall-pressure measurements close to the trailing edge were used as an input data. The comparisons of the predicted levels and measured ones showed a good agreement. After analysis of all results the following description of the tonal noise mechanism is proposed. At some initial point of the airfoil the Tollmien-Schlichting instabilities start. They are traveling downstream and continued to Kelvin-Helmholtz waves along the shear-layer of the separation bubble. These waves reach the trailing edge, scatter from it as acoustic waves, which move upstream. The acoustic waves amplify the boundary layer instabilities at some frequencies for which the phases of both motions match and creates the feedback loop needed to sustain the process

APA, Harvard, Vancouver, ISO, and other styles

24

Driffield, Nigel L. "Wages and labour productivity in the foreign owned sector of the UK : a comparison with domestically owned firms and implications for UK manufacturing." Thesis, University of Reading, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.317633.

Full text

APA, Harvard, Vancouver, ISO, and other styles

25

Davies, Sarah J. "The radiochemical evolution of the Devonian Orcadian Basin, NE Scotland and comparison with coeval clastic systems from Wales, Norway and the Clair Field." Thesis, University of Leicester, 1993. http://hdl.handle.net/2381/35012.

Full text

Abstract:

This thesis examines the radiochemistry of the Devonian sediments of the Orcadian Basin, NE Scotland, the Hornelen Basin, SW Norway, together with the SW Wales. A detailed study of the radiochemistry linked to standard sedimentological and geochemical techniques has permitted the utility of portable gamma-ray spectrometry to be assessed. There are no systematic stratigraphic changes in the relative abundances of K, U, Th or in the ratios Th/K and Th/U for either lacustrine or non-lacustrine sediments of the Devonian Orcadian Basin. Spatial radioelement variations related to lithology and source chemistry are more important for characterising the basin infill. Palaeoenvironmental reconstructions, combining sedimentology and radiochemistry, are presented for stages in the evolution of the northern Orcadian Basin. Differing K abundances from the Sandwick lacustrine sequence indicate separation of two depositional areas by a buried basement ridge. The different provenance of the southern and northern marginal fans in the Hornelen Basin, Norway, is reflected by Th and K. Provenance links between the basement and the marginal breccias of the Turriff Basin could be characterised radiochemically and were distinct from the main Lower Old Red Sandstone sediments derived from the Strichen granite. Gamma-ray characteristics linking basement and sediments elsewhere in the Orcadian Basin were less conclusive, implying that the local basement was a minor contributor to the sediment budget. Uranium enrichment is associated with (i) sediments in close proximity to Caledonian granitic basement and (ii) lacustrine intervals. U enrichment is a product of both syndepositional fixation in algal sediments and limited later mobilisation, predominantly restricted to the vicinity of the basement with the greatest concentration along synsedimentary faults. U (5 ppm) and Th (8 ppm) abundances define the zone of mineralisation associated with algal sediments. Lacustrine intervals were correlated using U only for widespread lacustrine conditions; as lacustrine intervals become marginal, U concentrations decrease and correlations are speculative. Lacustrine laminites are geochemically distinguished from sandflat sediments having higher Zr, Y, Cr, Nb, V and SiO2 contents.

APA, Harvard, Vancouver, ISO, and other styles

26

Zhang, Junbo. "EMPIRICAL COMPARISON OF THREE SIGNAL PROCESSING METHODS: ADAPTIVE PERIODOGRAM TECHNIQUE, MORLET WAVELET TRANSFORM, AND ADAPTIVE WINDOWED FOURIER TRANSFORM AND THEIR APPLICATION ON GRAVITY WAVES." Oxford, Ohio : Miami University, 2006. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=miami1145385180.

Full text

APA, Harvard, Vancouver, ISO, and other styles

27

Hansson, Göran. "Såld spannmål av kyrkotionden : Priser i Östergötland under Sveriges stormaktstid." Doctoral thesis, Umeå University, Economic History, 2006. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-796.

Full text

Abstract:

The thesis presents annual price series for rye and barley in Östergötland during the period 1592-1735. Prices of wheat, oats, animal products, building materials, iron, nails, horse shoes and horse shoe nails from about the mid-17th century up to 1735 are also presented and analysed. New data has been excerpted from four hospitals and about fifty parishes in Östergötland. Prices from other provinces have also been excerpted for the study. This nes data is compared to already published prices from Sweden´s capital and from several provinces in central parts of the western national region of Sweden of that time. This area constituted Sweden´s core region. By linking the studies results to previous research, a description is made of the price developments for rye, butter and tallow up to 1775, that is, during Sweden´s period of great power and age of freedom. A principal result for the roughly 150 years primarily covered by the thesis is that it was chiefly the prices of rye and barley, the most important food at the time, that fluctuated in twelve cycles. Periodically there were large fluctuatons. The price cycles for corn (half rye, half barley) had an average amplitude of somewhat more than 100 % and a duration of 11 years on average. The prices were on average higher further north in the country. The causes of the price fluctuations are complex. During the major part of the period studied, Sweden was at war or in armistice period, which occupied a large part of the male population. Politically, increasingly great power was gradually concentrated to the king and autocracy was introduced, culminating at the end of Charles XII´s regency. The peasantry was burdened by high taxes and other onuses. After the middle of the 17th century the country was no longer self-subsistent but largely dependent on corn import. The production of foddstuffs decreased, partly through a smaller part of the country´s resources beeing used for production, and partly due to bad harvests. Recurrent epidemics reduced the population even up to the early 18th century.

APA, Harvard, Vancouver, ISO, and other styles

28

Allen, Michael James. "An Evaluation of Seasonality through Four Delineation Methods: A Comparison of Mortality Responses and the Relationship with Anomalous Temperature Events." Kent State University / OhioLINK, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=kent1405326473.

Full text

APA, Harvard, Vancouver, ISO, and other styles

29

Bome-Mannathoko, Naledi Betsi. "Characterisation of Staphylococcus aureus from South West Wales : comparison of SCCmec-orfX amplification methods and genotyping of clinical isolates including Panton-Valentine Leukocidin-positive strains." Thesis, Swansea University, 2010. https://cronfa.swan.ac.uk/Record/cronfa42540.

Full text

Abstract:

Methicillin-resistant Staphylococcus aureus is a leading cause of hospital infections world-wide. Consecutive S. aureus wound isolates (n=561) were collected from PHW Microbiology ABM Laboratory, Swansea (PHW-ABM); 137 (24.4%) were mecA-positive; 424 (75.6%) were mecA-negative using real-time PCR. Audit revealed that 15 (10.9%) mecA-positive strains were not reported as MRSA. Genotyping was performed using pulsed-field gel electrophoresis (PFGE), spa typing and SCCmec typing. MRSA predominantly belonged to EMRSA-15 (89.1% >) and EMRSA-16 (5.8%) clones. All S. aureus strains were included in an evaluation of three SCCmec-orfX PCR assays. The assays had high diagnostic sensitivity (>95%) and specificity (> 94% >) but false negative and false positive results were obtained. A deletion at the SCCmec-orfX right junction was proposed as the probable cause of false negative results. SCCmec-associated loci ccrAB1, ccrAB4, ccrC, and dcs were detected in four false positive MSSA, respectively. MALDI Biotyper mass spectrometry was evaluated for identification of S. aureus. Nineteen (3.4%) of the PHW-ABM wound isolates were Panton Valentine-Leukocidin (PVL)-positive S. aureus. The molecular epidemiology of these and PVL-positive S. aureus (n=61) from Specialist Antimicrobial Chemotherapy Unit, Cardiff (SACU) was investigated using mecA and arginine catabolic mobile element PCRs, PFGE, spa and SCCmec typing. The PHW-ABM strains were predominantly MSSA belonging to the CC159 (n=5; 26.3%), CC275 (n=4; 21.1%) and CC005 (n=2; 10.5%) spa-BURP clusters, affiliated to the ST121, ST30 and ST22 lineages. Within the SACU cohort the USA300 clone (n=16; 26.2%) was predominant, other genotypes included: t044- MRSA-IVc (n=5; 8.2%); t002-MRSA-IVc (n=3; 4.9%) and t127-MRSA-IVa (n=2; 3.3%), affiliated to the European (ST80), USA800 (ST5) and USA400 (ST1) clones. Susceptibility testing demonstrated statistically significant differences between the SACU and PHW-ABM cohorts for oxacillin 57%/5% >, gentamicin 2%/16%, and tetracycline 10% >/42% resistance (p < 0.05). These observed differences highlight the importance of including unselected strains in addition to referred reference laboratory isolates in epidemiological investigations.

APA, Harvard, Vancouver, ISO, and other styles

30

Haddon, Rosalind Anne Wade. "Fourteenth century fine glazed wares produced in the Iranian world, and comparisons with contemporary ones from the Golden Horde and Mamlūk Syria/Egypt." Thesis, SOAS, University of London, 2011. http://eprints.soas.ac.uk/14697/.

Full text

APA, Harvard, Vancouver, ISO, and other styles

31

Wisthaler, Verena. "Immigration and collective identity in minority nations : a longitudinal comparison of stateless nationalist and regionalist parties in the Basque Country, Corsica, South Tyrol, Scotland and Wales." Thesis, University of Leicester, 2016. http://hdl.handle.net/2381/38751.

Full text

Abstract:

This PhD thesis evaluates the nexus between Stateless Nationalist and Regionalist Parties’ (SNRPs) constructions of minority nations’ identity and immigration. A longitudinal comparison (1992 – 2012) of the Basque Country, Corsica, South Tyrol, Scotland and Wales first explores the impact immigration has on the parties’ construction of the minority nations’ identity. Secondly, I examine if and under which conditions SNRPs consider migrants and migration-generated diversity to constitute an integral part of the minority nations. The dissertation relies on a qualitative analysis of SNRPs’ discourses on immigration, their construction of the migrant as ‘wanted’ or ‘unwanted,’ and their discourse and policies on migrant-integration. Finally, the thesis offers an innovative explanation of the diverse approaches to immigration and the construction of the nation confronted with immigration by SNRPs in the selected minority nations. I argue that, on the one hand, robust political-institutional relations between the state and the minority nation and, on the other, robust and conflict-free societal relations between the community claiming to belong to the minority nation and the state majority living within the minority nation have a significant impact on the SNRPs’ approach to immigration. Societal cleavages, which divide the receiving society in the minority nations are shown to impact the SNRPs’ framing of the minority nation’s identity. Parties instrumentalize the discourse on immigration to differentiate themselves as far as possible from their national governments’ approach to immigration and hence to strengthen their strategic interests for the territory, which usually overlap with demands for further devolution or secession. Thus, most SNRPs develop a particular form of instrumental nationalism which facilitates the construction of an identity based on civic and territorial markers. Such a framing of the minority nation’s identity allows the inclusion of migration-generated diversity, either through multicultural recognition or assimilation, but is constructed against the traditional ‘significant other’, namely the central state.

APA, Harvard, Vancouver, ISO, and other styles

32

Mohr, Matthias. "Mesoscale Simulations of Atmospheric Flow in Complex Terrain." Doctoral thesis, Uppsala University, Department of Earth Sciences, 2003. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-3461.

Full text

Abstract:

The MIUU mesoscale model was further developed, in order to include information on large-scale atmospheric fields from global or regional atmospheric climate- and weather-prediction models. For this purpose, a new lateral boundary condition was developed and implemented into the model. The new lateral boundary condition is a combination of two existing conditions, namely the flow relaxation scheme and the tendency modification scheme.

Tests indicated that an optimum lateral boundary configuration would be obtained with moderate to strong flow relaxation at higher levels, small flow relaxation at lower levels (within the atmospheric boundary layer), upstream advection at the outermost 4 grid points, and 6% horizontal grid stretching starting at a substantial distance from the lateral boundaries. The flow relaxation coefficients should be specified carefully, in order to minimize the reflection of all kinds of waves at the lateral boundaries.

The summer thermal low in the mean-sea-level pressure field over North America is traditionally analyzed over the northern end of the Gulf of California. The position of this low is influenced by the application of the so-called plateau correction in obtaining mean-sea-level pressure values from highly elevated stations in North America. A model study indicated that the low should be located approximately 450 km to the north and somewhat to the east of the above location.

A statistical comparison of model results from two mesoscale models against upper-air and surface measurements from several sites was carried out. Statistical methods, however, give only an insufficient picture of overall model performance. A comparison between predicted and measured tracer concentrations could be used to better evaluate the overall performance of different models.

Sound propagation in the atmosphere was predicted in a mountain valley using a mesoscale atmospheric model together with a sound propagation model. This suggests that forecasts of sound propagation should be possible in future.

APA, Harvard, Vancouver, ISO, and other styles

33

Sorby, Janet, and n/a. "ASCIS subject headings and student terminology : the relationship between the subject headings used in manual school library catalogues in New South Wales and the subject access terms generated by NSW Higher School Certificate syllabus documents, textbooks and examination questions." University of Canberra. Communication, 1989. http://erl.canberra.edu.au./public/adt-AUC20050516.152713.

Full text

Abstract:

The present study was undertaken to investigate the concerns of secondary school teacher-librarians, that the subject headings set down by the Australian Schools Catalogue Information Service (ASCIS) do not cover topics in senior sourses of study. NSW HSC Economics was chosen to test this perception. Terms were extracted from three textual sources (syllabus, textbook and examination papers) and checked against the subject headings in the ASCIS Subject Headings List. A comparison was made between terms which matched exactly, those which were only partially matched and those which had no match. The linguistic complexity of the term (single-word or multi-word) and the number of textual sources using the term were also taken into account. The results showed a varying degree of match between textual terms and subject headings. Single-word terms found in more than one textual source were much more likely to be found in the subject headings than those from only one textual source. Multi-word terms were found less frequently than single-word terms, but were also more likely to be found when they came from more than one textual source. There was a large number of partial matches in this group, and these were found to be more general in concept than the textual terms. Most of the terms were found, but the general nature of the partial matches and the lack of adequate cross references may cause problems in subject analysis and retrieval.

APA, Harvard, Vancouver, ISO, and other styles

34

MacRae, Elizabeth A. "A comparison between prosecutorial decision-making in Scotland and England and Wales : an analysis of the workings of prosecution offices in the Fiscal Service and the Crown Prosecution Service." Thesis, University of Cambridge, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.363911.

Full text

APA, Harvard, Vancouver, ISO, and other styles

35

van, Gaalen Joseph F. "Longshore Sediment Transport From Northern Maine To Tampa Bay, Florida: A Comparison Of Longshore Field Studies To Relative Potential Sediment Transport Rates Derived From Wave Information Study Hindcast Data." Scholar Commons, 2004. https://scholarcommons.usf.edu/etd/1280.

Full text

Abstract:

This paper examines the regional longshore sediment transport pattern of the seaward coast of the United States and Gulf of Mexico from northern Maine to Tampa Bay, Florida. From previous studies it is known that along the coast there are variations in direction of sediment transport known as nodal zones as well as variations in sediment transport rate. Wave Information Study (WIS) hindcast data for the interval 1976 through 1995 (United States Army Corps of Engineers, 2003) provide a spatially continuous model of the regional longshore current directions in the study area. In chapter one, all available published field studies of longshore current direction and sediment transport directions and rates are compiled to create a description of the direction and, whenever possible, magnitude of longshore transport. A detailed compilation of regional and local published studies are provided in tables. An interpretation of sediment transport rates and directions is provided in eight regional maps of the study area. In chapter two the results of the literature compilations are compared with gross and net potential sediment transport directions and rates modeled using WIS hindcast data. The WIS deep-water wave characteristics are used to predict the directions and rate of longshore sediment transport at local outer coast positions using the method of Ashton et al. (2003a). The WIS-derived transport directions, including nodal zones, generally agree with the published field studies, although there are a few local inconsistencies particularly near inlets, shoals and irregular bathymetry. Trends in longshore transport rates, such as increases and decreases in gross transport rates are well represented by the WIS-derived potential transport rates. The discrepencies between the published field studies and WIS results are apparently primarily due to assumptions in the WIS model, such as assuming shore-parallel bathymetric contours.

APA, Harvard, Vancouver, ISO, and other styles

36

Schreiner, Anne [Verfasser], and Joachim [Gutachter] Saur. "A Model for Dissipation of Solar Wind Turbulence with Damping by Kinetic Alfvén Waves: Comparison with Observations and Implications for the Dissipation Process in the Solar Wind / Anne Schreiner ; Gutachter: Joachim Saur." Köln : Universitäts- und Stadtbibliothek Köln, 2017. http://d-nb.info/113762423X/34.

Full text

APA, Harvard, Vancouver, ISO, and other styles

37

Pelikánová, Radka. "Česko - Slovensko: vývoj obou zemí po rozdělení společného státu." Master's thesis, Vysoká škola ekonomická v Praze, 2013. http://www.nusl.cz/ntk/nusl-165091.

Full text

Abstract:

International comparison is very popular area of statistics, which is used to examine differences in many fields of science. This thesis seeks to apply the concepts of International comparison to the Czech Republic and the Slovak Republic. Though it has been 20 years since Czech and Slovak Republic separated from each other yet, rivalry exists between the two countries. Particularly, the socio-economic factors contributing to this rivalry have been of interest to economists. To further explore this rivalry, this master thesis aims to describe the difference in evolution of demographic, economic and social indicators that characterize development of countries and standard of living of its population. This paper consists of four main chapters. The first chapter outlines the introduction to time series and describes methods used in the following chapters for analysis of indicators. The second chapter briefly defines monitored indicators in terms of their objectivity, methodology and comparability in both countries. The third chapter analyzes the evolution in time and directly compares the values of indicators. The fourth chapter analyzes the average and median wages in greater detail. These indicators were chosen for analysis as they largely affect the standards of living in both countries. From the perspective of comparison method it is not straightforward to determine that one country has better results in all indicators than the other. Yet, here are two main broad conclusions. First, the notional "scores" are similar for demographic indicators. Second, Czech Republic has better social and economic indicators results then Slovak Republic. The analysis of trend models of average and median wage found that the social gap is widening in both countries. However, after converting to the same exchange rate, it is clear that the wage level is better in Czech Republic then in Slovak Republic.

APA, Harvard, Vancouver, ISO, and other styles

38

Le, Merle Eva. "Étude des propriétés physiques des vagues océaniques à partir d'observations par radar aéroporté à ouverture réelle." Electronic Thesis or Diss., Université Paris-Saclay (ComUE), 2019. http://www.theses.fr/2019SACLV084.

Full text

Abstract:

La compréhension et la prévision des vagues relèvent d’un enjeu économique et sociétal d’une part, notamment pour la navigation, les activités pétrolières et côtières, et d’un enjeu climatique d’autre part car les vagues participent aux échanges entre l’océan et l’atmosphère. Ces échanges se font par le biais de processus physiques complexes. L’observation des vagues par les instruments in situ et par télédétection a permis d’améliorer la représentation des vagues dans les modèles. Cependant, l'amélioration des concepts instrumentaux et l’amélioration de la représentation des processus physiques liés à l’évolution des vagues dans les modèles nécessitent de poursuivre des travaux de recherche en physique de la mesure par télédétection radar de la surface océanique. Le radar SWIM, à bord de la mission CFOSAT, est un nouveau concept dédié à la mesure des spectres de vagues. Ce système permet de fournir des informations détaillées sur les vagues à l’échelle globale. Afin de préparer la mission CFOSAT, un radar aéroporté a été développé par le CNRS-LATMOS avec le soutien du CNES. Ce radar, dénommé KuROS, utilise un principe et une géométrie de mesure comparables à ceux relatifs au radar SWIM. Les objectifs de cette thèse sont doubles : d’une part comprendre les performances et les limites du radar aéroporté KuROS, et d’autre part caractériser l’apport de l’information spectrale observée à moyenne échelle par un tel concept. La première partie de la thèse traite de la comparaison des paramètres spectraux des vagues mesurées par KuROS, lors de deux campagnes de mesure, avec des données issues de modèles de vagues. On montre en particulier que les situations pour lesquelles la longueur d’onde des vagues est inférieure à 200 m et leur hauteur significative est inférieure à 4 m sont les plus appropriées à la mesure des spectres de vagues par KuROS. Un simulateur a ensuite été développé afin de quantifier les performances des mesures en fonction de l’état de la surface marine et de la géométrie d’observation. Les résultats de ce simulateur, comparés aux observations, nous permettent de confirmer les conditions dans lesquelles les paramètres spectraux sur les vagues issus de KuROS sont obtenus avec une bonne précision et de préciser quels sont les facteurs qui impactent le plus la dégradation de la précision de mesure dans certaines conditions d’état de mer
Understanding and forecasting waves is very important for economic and societal issues because they have an impact on the navigation, oil industry and littoral activities. Moreover, waves are the principal actor in air sea exchange processes which have an important impact on climate. Wave observations with in situ measurements and remote sensing observations allow to improve the representation of wave physical processes in the models. However, improvement of instrumental concept and the improvement of the wave representation in the models still need to pursue the work in the understand of the radar measurement over oceans. The SWIM radar, onboard the CFOSAT mission, is a new concept dedicated to the measurement of wave spectra at the global scale. This system provides detailed information about waves (height, frequency, direction, spread…). In order to prepare the CFOSAT mission, the CNRS-LATMOS developed an airborne radar with the help of the French space agency (CNES). This radar named KuROS uses measurement geometry and principle similar to the ones of SWIM. The objective of the thesis is twofold: firstly, to characterize and understand the performances and the limits of the KuROS airborne radar and secondly, to identify the complementary information provided by the spectral measurements of waves at the regional scale in the study of wave physics and modelling. The first part of the thesis is about the comparison of the wave parameters measured by KuROS during two field campaigns with data from wave models. We show that conditions with wavelengths lower than 200 m and significant wave heights lower than 4 m are the most appropriated situations for the wave spectrum measurements with KuROS. A simulator has been developed in order to evaluate the measurement performances with respect to the sea surface state and the observation geometry. The results of the simulations, compared to the observations, allow us to confirm in which conditions wave spectral parameters are obtained with a good accuracy with KuROS and to specify the factors which impact the most the measurement accuracy in some sea state conditions

APA, Harvard, Vancouver, ISO, and other styles

39

Tomkinson, John. "Les femmes devenues mères durant leur adolescence en France et en Angleterre-Galles : trois temps d'un comportement reproductif "hors norme"." Thesis, Strasbourg, 2018. http://www.theses.fr/2018STRAG005/document.

Full text

Abstract:

Ce travail de doctorat en démographie met l'accent sur l'entrée très précoce dans la maternité dans une perspective comparative entre deux pays proches sur le plan socioéconomique, mais qui se distinguent sur le plan de la fécondité, surtout pendant la période de l'adolescence – la France et l'Angleterre-Galles. Il explore les maternités adolescentes en tant que comportement reproductif « hors norme » et tente de placer ces maternités « non désirées » dans le contexte de la transition vers l’âge adulte. Nous offrons une vue longitudinale de cette problématique en décrivant « trois temps » de la vie d’une mère adolescente :- Le temps d’« avant maternité » où le fait de devenir mère adolescente est fonction de trois probabilités : celle d’avoir des rapports sexuels, celle de recourir à un (des) moyen(s) contraceptif(s) et celle de recourir à l’IVG en cas de grossesse ;- Le temps de la maternité. Quelles sont les situations de vie de ces mères adolescentes au moment de la naissance de leurs enfants ? - Le temps d’« après-maternité ». Comment varient les parcours génésiques, conjugaux, professionnels et résidentiels des femmes en fonction de leur âge à l’entrée dans la maternité ?
This thesis in demography focuses upon very early entries into motherhood in a comparative perspective between two countries similar in socioeconomic terms but differing vastly in terms of fertility, especially during adolescence - France and England and Wales. It explores adolescent maternities as an “uncommon” reproductive behaviour and aims to place these un-“unintended” births in the context of the transition to adulthood. We offer a longitudinal view of this phenomenon by describing three “periods” in the life of an adolescent mother:- The period “before maternity” where becoming an adolescent mother is a function of three probabilities: of having sexual intercourse, of using contraception and of having an abortion in case of a pregnancy;- The period of the maternity. What are the characteristics and life conditions of adolescent mothers at the time of birth ?- The period “after maternity”. How do the reproductive, conjugal, professional and residential trajectories of mothers vary in function of their age at first birth ?

APA, Harvard, Vancouver, ISO, and other styles

40

Hee, Sonke. "Computational Bayesian techniques applied to cosmology." Thesis, University of Cambridge, 2018. https://www.repository.cam.ac.uk/handle/1810/273346.

Full text

Abstract:

This thesis presents work around 3 themes: dark energy, gravitational waves and Bayesian inference. Both dark energy and gravitational wave physics are not yet well constrained. They present interesting challenges for Bayesian inference, which attempts to quantify our knowledge of the universe given our astrophysical data. A dark energy equation of state reconstruction analysis finds that the data favours the vacuum dark energy equation of state $w {=} -1$ model. Deviations from vacuum dark energy are shown to favour the super-negative ‘phantom’ dark energy regime of $w {< } -1$, but at low statistical significance. The constraining power of various datasets is quantified, finding that data constraints peak around redshift $z = 0.2$ due to baryonic acoustic oscillation and supernovae data constraints, whilst cosmic microwave background radiation and Lyman-$\alpha$ forest constraints are less significant. Specific models with a conformal time symmetry in the Friedmann equation and with an additional dark energy component are tested and shown to be competitive to the vacuum dark energy model by Bayesian model selection analysis: that they are not ruled out is believed to be largely due to poor data quality for deciding between existing models. Recent detections of gravitational waves by the LIGO collaboration enable the first gravitational wave tests of general relativity. An existing test in the literature is used and sped up significantly by a novel method developed in this thesis. The test computes posterior odds ratios, and the new method is shown to compute these accurately and efficiently. Compared to computing evidences, the method presented provides an approximate 100 times reduction in the number of likelihood calculations required to compute evidences at a given accuracy. Further testing may identify a significant advance in Bayesian model selection using nested sampling, as the method is completely general and straightforward to implement. We note that efficiency gains are not guaranteed and may be problem specific: further research is needed.

APA, Harvard, Vancouver, ISO, and other styles

41

Lin, Yin-Cheng. "Characterizing Vs profiles by the SASW method and comparison with other seismic methods." Thesis, 2007. http://hdl.handle.net/2152/3079.

Full text

APA, Harvard, Vancouver, ISO, and other styles

42

Lin, Yin-Cheng 1972. "Characterizing Vs profiles by the SASW method and comparison with other seismic methods." 2007. http://hdl.handle.net/2152/13266.

Full text

APA, Harvard, Vancouver, ISO, and other styles

43

Cranfill, Mary Rhonda. "Colonial ceramic wares comparison based on mineralogical, petrological and compositional data /." 2006. http://purl.galileo.usg.edu/uga%5Fetd/cranfill%5Fmary%5Fr%5F200605%5Fms.

Full text

APA, Harvard, Vancouver, ISO, and other styles

44

Cardoso, João Ricardo Dias. "A comparison between geometric properties and central moments to detect P300 waves." Master's thesis, 2018. http://hdl.handle.net/10451/35288.

Full text

Abstract:

Tese de mestrado, Informática, Universidade de Lisboa, Faculdade de Ciências, 2018
Brain-Computer Interfaces (BCI) are a way to communicate without using any mus- cle movement, using only signals generated by the brain and collected using Electroen- cephalogram (EEG). This kind of applications are appropriate for people with physical disabilities since they cannot use devices like the mouse or the keyboard. One of the paradigms of the BCI applications is the P300. This is a signal that happens when we identify or recognize something that we are waiting for. A practical application of these BCIs are the Spellers that contain letters and allow users to write. The Spellers light the letters randomly, leading to the generation of P300 signals when the desired letters are highlighted. There are several methods for detecting the P300, but most of them require training and calibration prior to use to achieve acceptable success rates. Some even need to be calibrated for each user before they can be used. With this work we intend to develop two new methods to detect the P300 signal and compare them to find the best. The first one uses physical features of the signal (geometric shape) and the second uses regions of the signals, described with central moments. For both methods we intend that they do not need individual training. To do this, we studied the existing approaches to detect P300, and analyzed some Spellers. For the creation of the first method, we described the signals using a set of geometric properties. We also conducted tests to find the best classifier and created an EEG signal pre-processing pipeline allowing our method to use signals from different record devices. For the creation of the second method we conducted the same steps, however we chose a set of regions of the signal to describe the signal and in each of these regions we used central moments to describe them. Finally, we conducted an exper- imental evaluation to compare our methods with others. The results showed that between our methods the best one is the central moments method, since it showed in almost all users accuracies above 90% for 2 datasets. However, the geometric models had close ac- curacies but not enough to overtake the central moments model. In the last dataset, from which we had the accuracy of the Stepwise Linear Discriminant Analysis (SWLDA) from the authors, none of our methods had an average accuracy value above 80%. However, the central moments model, presented results above 80% for two users and in the rest of the users presented accuracy values close to the results of the SWLDA.

APA, Harvard, Vancouver, ISO, and other styles

45

CHIU, LIU TSUNG, and 劉仲秋. "Comparison of characteristics of waves near the coasts of Longdon and kueisan Island." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/32565025693876047503.

Full text

Abstract:

碩士
國立臺灣海洋大學
海洋環境資訊學系
95
Abstract Wind and wave data, measured by the buoy stations located off the Longdon and Kuisan Island at the northeast coast were obtained. Wind speed and direction, significant wave height and significant wave period were analyzed. The results of analysis indicated that the wind and wave climates in the two stations are different, and their differences also depend on the season. In the summer the wind at London was in the SSW direction with mean speed of 5.5m/s and in the NNE with 8.2m/s in the winter. The summer wind at Kuisan was in the SSE direction at 6.1m/s. The wind conditions at Kuisan are similar to that of London in the winter. Waves measured in summer showed that the two locations had the same mean significant wave height of 0.8m. In the winter the wave height at Longdon was 1.7m, about twice as large as in the summer, and 1.1m at Kueisan. The winter waves at Longdon had a mean significant period of 6.2s, which was higher than the 5.9s measured at Kuisan. In the summer, the wave period at Longdon was 5.8s and 5.5s at Kueisan. This study also compared the wave conditions predicted by the Central Weather Bureau. It was found on average the predicted wave in Beaufort scale were 2-3 scales higher than observed. This study also examined the wind and wave relationship. It was found that by using a second-degree regression the regression coefficient were all less than that given by Ochi (1982) for fully developed sea, indicating that the waves measured at these two location were not fully developed. The results also showed that at zero wind there were waves present at these two locations. Second-degree regressions with zero wind wave height were conducted. It was found that, in the summer the wind wave relationships were identical for the two locations. In the winter, the wave height at Longdon was 1.1m with zero wind, while it was 0.4m at Kueisan. The winter waves at the two locations had different wind and wave relationships.

APA, Harvard, Vancouver, ISO, and other styles

46

Gumble, Jason Ethan. "Complete anisotropic analysis of three component seismic data related to the marine environment and comparison to nine component land seismic data." Thesis, 2006. http://hdl.handle.net/2152/2874.

Full text

APA, Harvard, Vancouver, ISO, and other styles

47

Májková, Tereza. "Effects of minimum wages: do regional data tell a different story?" Master's thesis, 2017. http://www.nusl.cz/ntk/nusl-357640.

Full text

Abstract:

This thesis examines the effects of an increase of minimum wage level on unemployment, employment, disposable income and risk of poverty. We contribute to the existing literature by directly comparing results resulting from two similar datasets, one working with national, one with regional data. We use different sets of explanatory variables to see whether they affect the results of the estimation. On national level, our results confirm positive effect of minimum wages on employment of adults and on disposable income - but these findings were not confirmed on regional level. With respect to the regional perspective, the results are however subject to substantial uncertainty and are prone to substantial sensitivity to empirical specification. We attribute this uncertainty mainly to the quality of the data - small number of observations together with large heterogeneity. JEL Classification E02, E24, J08, J30 Keywords minimum wages, employment effect, disposable income, risk of poverty, panel data, NUTS 2 regions, comparison Author's e-mail majkovat@gmail.com Supervisor's e-mail jaromir.baxa@fsv.cuni.cz

APA, Harvard, Vancouver, ISO, and other styles

48

Cole, Janine. "Determining the best apparent resistivity versus frequency definition for a magnetotelluric sounding : a comparison between two statistical techniques." Diss., 2001. http://hdl.handle.net/2263/29641.

Full text

APA, Harvard, Vancouver, ISO, and other styles

49

Hsin-YunChang and 張馨云. "Comparison of Experimental Measurements and Numerical Simulations for Vertical Axis Wind Turbine Wakes in an Open-Jet Wind Tunnel." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/58z89p.

Full text

Abstract:

碩士
國立成功大學
工程科學系
106
Energy made human life progress, and science technology advanced faces an issue which the energy consumption increased. Using the renewable energy is a method for solving the problem of energy scarcity, the wind power generation has more interest in the countries around the world. The wind turbines are according to their structures divided into vertical axis wind turbine (VAWT) and horizontal axis wind turbine (HAWT). The HAWT has commonly applied in open space and that the high efficiency at high wind speed. However, the VAWT has unlimited potential in power generation which the advantage is not a lot of restrictions on the site and the flow direction. The research relevant the VAWT is mostly about the analysis and comparison of its performance characteristics. The wake characteristics are also important for wind energy development. In this study, comparison of experimental measurements and numerical simulations for vertical axis wind turbine wakes in an open-jet wind tunnel which the wind turbine model is an airfoil NACA9412 four-blade VAWT. The two kinds of experimental measuring instruments in the experiment which are the cobra probe and the hot wire probe for comparing the result between different measurement instruments. In the CFD simulation part, the transient Navier-Stokes equations are solved using the Large Eddy Simulation (LES). We use the SIMPLE algorithm in the split solver and the coupled algorithm in the coupled solver for solve and compare the wake characteristics. The results were analyzed normalized time-averaged velocity of streamwise and spanwise, the turbulence intensity for streamwise and spanwise, and momentum flux at the horizontal plane. The spectrum analysis with data collected using the cobra probe and the hot-wire probe shows the expected slope of -5/3 to indicate the inertial subrange, which increases the reliability of the data measured in this experiment. In order to develop the wind energy and accurate VAWT models that though the VAWT wake compaction of the measuring experiment and the CFD simulation.

APA, Harvard, Vancouver, ISO, and other styles

50

Leslie, Ian. "A comparison of the methods of engineering seismic refraction analysis and generalized linear inversion for deriving statics and shallow bedrock velocities /." 1994. http://collections.mun.ca/u?/theses,90676.

Full text

APA, Harvard, Vancouver, ISO, and other styles

Dissertations / Theses on the topic 'Comparison of waxes'

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