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1
Rideout, Roxanne Sharon. « Partnerships in education : secondary/post-secondary collaboration / ». Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape3/PQDD_0035/MQ62419.pdf.
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Doubt, Lorna C. « A secondary guy, physically disabled teenagers in secondary schools ». Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp04/mq22300.pdf.
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Wong, Shiu-tao Stephen, et 黃紹滔. « Secondary school prototype ». Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2000. http://hub.hku.hk/bib/B31985531.
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Bolouri, H. « Secondary ion emission ». Thesis, University of Salford, 1985. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.353964.
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Kaouri, Katerina. « Secondary sonic boom ». Thesis, University of Oxford, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.409807.
Texte intégralRésumé :
This thesis aims to resolve some open questions about sonic boom, and particularly secondary sonic boom, which arises from long-range propagation in a non-uniform atmosphere. We begin with an introduction to sonic boom modelling and outline the current state of research. We then proceed to review standard results of gas dynamics and we prove a new theorem, similar to Kelvin's circulation theorem, but valid in the presence of shocks. We then present the definitions used in sonic boom theory, in the framework of linear acoustics for stationary and for moving non-uniform media. We present the wavefront patterns and ray patterns for a series of analytical examples for propagation from steadily moving supersonic point sources in stratified media. These examples elucidate many aspects of the long-range propagation of sound and in particular of secondary sonic boom. The formation of `fold caustics' of boomrays is a key feature. The focusing of linear waves and weak shock waves is compared. Next, in order to address the consistent approximation of sonic boom amplitudes, we consider steady motion of supersonic thin aerofoils and slender axisymmetric bodies in a uniform medium, and we use the method of matched asymptotic expansions (MAE) to give a consistent derivation of Whitham's model for nonlinear effects in primary boom analysis. Since for secondary boom, as for primary, the inclusion of nonlinearities is essential for a correct estimation of the amplitudes, we then study the paradigm problem of a thin aerofoil moving steadily in a weakly stratified medium with a horizontal wind. We again use MAE to calculate approximations of the Euler equations; this results in an inhomogeneous kinematic wave equation. Returning to the linear acoustics framework, for a point source that accelerates and decelerates through the sound speed in a uniform medium we calculate the wavefield in the `time-domain'. Certain other motions of interest are also illustrated. In the accelerating and in the manoeuvring motions fold caustics that are essentially the same as those from steady motions in stratified atmospheres again arise. We also manage to pinpoint a scenario where a `cusp caustic' of boomrays forms instead. For the accelerating motions the asymptotic analysis of the wavefield reveals the formation of singularities which are incompatible with linear theory; this suggests the re-introduction of nonlinear effects. However, it is a formidable task to solve such a nonlinear problem in two or three dimensions, so we solve a related one-dimensional problem instead. Its solution possesses an unexpectedly rich structure that changes as the strength of nonlinearity varies. In all cases however we find that the singularities of the linear problem are regularised by the nonlinearity.
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Svystun, Serhii, et Сергій Сергійович Свистун. « Secondary power supply ». Thesis, National Aviation University, 2021. https://er.nau.edu.ua/handle/NAU/50165.
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1.Rules of arrangement of electrical installations. The fourth edition, revised and supplemented - H .: Publishing House "Fort", 2011.— 736 p.
2.Handbook of rural electrician / Edited by Candidate of Technical Sciences VS Oiler. - 3rd edition, revised and supplemented. - Kyiv, Publishing House "Harvest", 1989. - 264 p.
3.Budishchev MS Electrical engineering, electronics and microprocessor technology. Textbook. - Lviv: Afisha, 2001. - 424 p.
4.DSTU 2843-94. Electrical engineering. Basic concepts. Terms and definitions. Valid from 1995-01-01. - Kyiv: Derzhspozhyvstandart Ukrainy, 1995. - 65 p.In the era of modern technologies, people can’t live without electronic devices, even a few days. At the moment, phones are commonplace, something we are used to. Every morning we get up and look at the charging rate of our smartphone. So let's analyze the simplest secondary power source - a phone charger.
В епоху сучасних технологій люди не можуть жити без електронних пристроїв, навіть кілька днів. На даний момент телефони - звична справа, до чого ми звикли. Щоранку ми встаємо і дивимось на швидкість зарядки нашого смартфона. Тож давайте проаналізуйте найпростіше вторинне джерело живлення - зарядний пристрій для телефону.
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Wong, Shiu-tao Stephen. « Secondary school prototype ». Hong Kong : University of Hong Kong, 2000. http://sunzi.lib.hku.hk/hkuto/record.jsp?B25947953.
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Callahan, Marguerite (Marguerite Louise). « Identification of the Competencies Needed by Secondary & ; Post Secondary Career Counselors to Initiate and Maintain Articulation of Secondary & ; Post Secondary Comprehensive Career Development Programs and Services ». Thesis, University of North Texas, 1997. https://digital.library.unt.edu/ark:/67531/metadc278803/.
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This study researched effect of selected demographic variables on the self-perceived competencies of career counselors at secondary and post secondary institutions in Texas. Demographic variables were years of service, educational level, type of institution, age of counselor, size of institution, and percentage of vocational enrollment. One hundred career counselors, fifty secondary and fifty post secondary career counselors were mailed copies of the Professional Needs Assessment and a Demographic questionnaire.
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Rickman, Richard Dale. « Secondary ion emission from ». Diss., Texas A&M University, 2004. http://hdl.handle.net/1969.1/520.
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Some collision cascades, induced by keV polyatomic projectiles, result in the emission of multiple secondary ions. Such co-emissions imply that the ejecta originate from molecules co-located within the nano-volume perturbed by a single projectile impact. The relevance for the chemical analysis of nano-domains depends on the effectiveness of the projectile to cause co-emission of two or more secondary ions. This research examines how projectile characteristics, i.e. the energy and number of constituent atoms in the projectile, influence multiple secondary ion emission, or "superefficient" events. In addition we examine the relevance of this technique for nanostructure investigation. Yields have been measured for multi-ion emission events as a function of projectile characteristics. The data show that some collision cascades are "superefficient". For example, in a four-ion emission event, the yield for the phenylalanine quasi-molecular ion is two orders of magnitude larger from Au4+ impacts than from equal velocity Au+ projectiles. Yields for the co-emission of two phenylalanine quasi-molecular ions from "super-efficient" events have been measured. This case is particularly productive in that the detection of two analytically significant ions is recorded from a single event. Large increases (one to two orders of magnitude) in co-emitted ion yields were observed with increasing projectile energy and complexity. Correlation coefficients were calculated for the co-emission of two Ph ions, their behavior suggests differences in emission pathways for bombardment by atomic and polyatomic projectiles. Finally, we use this methodology to investigate surface structural effects on the occurrence of "super-efficient" events. The results indicate that it is possible to distinguish between two phases of a chemical compound although the stoichiometry remains the same. These results confirm previous predictions concerning the chemical nature of these "super-efficient" events. Also shown is that they are sensitive to the surface nanoenvironment. This approach extends the technology of Secondary Ion Mass Spectrometry by providing a methodology for probing surface nano-domains at the sub100 nm level.
10
Pettersson, Karl. « Secondary Controlled Swing Drive ». Thesis, Linköping University, Linköping University, Fluid and Mechanical Engineering Systems, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-19032.
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The purpose of the thesis has been to design and simulate different concepts of a secondary controlled swing drive for a wheel excavator. Secondary control is a known technology in the field of hydraulics that offers precise positioning as well as the possibility of energy recuperation. Secondary control is today used in certain industrial applications and is rather unemployed in mobile machinery. An excavator moves high loads in cyclic motions which are ideal conditions for energy recuperating systems. A study of the potential of a secondary controlled swing drive is therefore interesting. The focus has been on testing different circuit architectures and emergency brake concepts.
The results of the design process have been three types of circuit architectures and two types of hydraulic safety concepts. The results of the simulation have shown that the open and closed circuit architecture have similar energy efficiency. The closed circuit with low pressure accumulator however offers the best controllability. At least 20% energy savings can be achieved by storing thekinetic energy when braking.
A hydraulic emergency brake must function, independent on the direction of rotation of the excavator during a failure. The first principle recognises the rotation direction and changes the swivel angle of the secondary unit so that a braking torque is created. In the second principle a pressure difference is built up over the secondary unit that always results in a braking torque. Simulationshave shown that the principle with recognition of the speed direction is the most effective safety concept.
11
Wood, Matthew J. « Protein secondary structure prediction ». Thesis, University of Nottingham, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.430525.
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Malardel, Sylvie. « Ordinary secondary frontal waves ». Thesis, University of Reading, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.282623.
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Santos, German R. « Studies on secondary instabilities ». Diss., Virginia Polytechnic Institute and State University, 1987. http://hdl.handle.net/10919/49885.
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Significant advances in understanding early stages of transitional flows have been achieved by studying secondary instabilities in selected prototype flows. These secondary instabilities can be modeled as parametric instabilities of the nearly periodic flow that consists of the prototype velocity profile and a superposed finite-amplitude TS-wave (wavelength λ). The generally three dimensional secondary instabilities are governed by a linearized system of partial differential equations with periodic coefficients which are reduced to an algebraic eigenvalue problem through the application of a spectral collocation method
Following Floquet theory, previous analysis looked for subharmonic (wavelength 2 λ) and fundamental (wavelength λ) types of solutions. We extend the Floquet theory to solutions having arbitrary wavelengths, hence including the previous solutions as special cases. Modes with wavelength in between the subharmonic and fundamental values are called detuned modes. Detuned modes lead to combination resonance which has been observed in controlled transition experiments. Knowledge of the bandwidth of amplified detuned or (combination) modes is very important for clarification of the selectivity of the early stages of transition with respect to initial disturbances.
We have selected two flows: the Blasius boundary layer flow and the hyperbolic-tangent free-shear flow as prototypes of wall bounded Hows and unbounded Hows, respectively. In the Blasius flow we have concentrated on studying detuned modes. We found the growth rates of modes slightly detuned from the subharmonic wavelength to be almost as large as the growth rate of the subharmonic itself. This result is consistent with both the broadband spectra centered at subharmonic frequency observed in the "biased" experiment of Kachanov & Levchenko, wherein only the TS frequency was introduced, and with the large band-width of resonance in the "controlled" experiments, wherein a TS wave and the detuned modes were introduced simultaneously.
In the free-shear flow, our goals were three-fold. The first was to investigate whether the Floquet analysis based on the shape assumption for TS waves would provide results consistent with results for the stability of Stuart vortices. Second, we aimed at revealing the effect of viscosity on these results. Finally, we wanted to evaluate a group of spectral methods for the numerical treatment of the flow in an unbounded domain. We have made a detailed analysis of subharmonic, fundamental, and detuned modes. Results display the basically inviscid, convective character of the secondary instabilities, and their broadband nature in the streamwise and spanwise directions. In the inviscid limit, and for neutral TS waves, a detailed comparison is made with the closely related study on stability of Stuart vortices by Pierrehumbert & Widnall. Good quantitative agreement is obtained. For a wide range of Reynolds numbers and amplitudes of the 2-D primary wave, results reveal that the most unstable subharmonic modes are two-dimensional (vortex pairing). On the other hand, the most unstable fundamental modes are three-dimensional, with short spanwise wavelengths. Detuned modes have characteristics in between, being most unstable in the two-dimensional or three-dimensional form depending on the detuning value.
Comparisons of our results for a superposed TS wave of constant amplitude with results obtained by numerical simulations suggested that the growth of the TS wave may have a significant effect on the secondary disturbance growth. To check this hypothesis, we have developed a numerical method that accounts for small variations in the TS amplitude. However, the results indicate that the discrepancies are due to other yet concealed effects.Ph. D.
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Kunz, Emily Ann Hales. « Secondary Mathematics Teachers' Mindsets ». BYU ScholarsArchive, 2020. https://scholarsarchive.byu.edu/etd/8691.
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Much research supports that student mindset influences how well students do in school and that teacher actions influence student mindset. Research has also shown that just because a teacher has a growth mindset, it does not imply that their students will also have a growth mindset. This research looks closer as to why a teacher's mindset does not correlate with their students' mindset by further examining teacher mindset and the connection between teacher mindset and teacher actions. In summary, teachers' mindsets do not directly influence student mindset for a few reasons: secondary mathematics teachers have different mindsets towards honors and regular students, while they have heard about mindset, they do not understand mindset deeply, and mathematics teachers do not know how to help their students develop a growth mindset.
15
Vurbic, Drina. « Mechanisms of Secondary Extinction ». ScholarWorks @ UVM, 2010. http://scholarworks.uvm.edu/graddis/237.
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Pavlov (1927) first reported that following appetitive conditioning of multiple stimuli, extinction of one CS attenuated responding to others which had not undergone direct extinction. Four experiments with rat subjects investigated potential mechanisms of this secondary extinction effect. Experiment 1 assessed whether secondary extinction would be more likely to occur with target CSs that have themselves undergone some prior extinction. Two CSs were initially paired with shock. One CS was subsequently extinguished before the second CS was tested. The target CS was partially extinguished for half the rats and not extinguished CS for the other half. A robust secondary extinction effect was obtained with the non-extinguished target CS. Experiment 2 investigated whether secondary extinction occurs if the target CS is tested outside the context where the first CS is extinguished. Despite the context switch secondary extinction was observed. Extinction of one CS was also found to thwart renewal of suppression to a second CS when it was tested in a neutral context. Experiment 3 examined whether secondary extinction can be attributed to mediated generalization caused by association of the CSs with a common US during conditioning. Rats received conditioning with three CSs and then extinction with one of them. Secondary extinction was observed with a shock-associated CS when the extinguished CS had been associated with either food pellets or shock, suggesting that secondary extinction is not US-specific and is thus not explained by this mediated generalization mechanism. Experiment 4 examined whether intermixing trials with the two stimuli during conditioning is necessary for secondary extinction to occur. Rats were either conditioned with intermixed trials as in Experiments 1-3, or with blocked trials of each CS presented in conditioning sessions separated by a day. Secondary extinction was observed only in the former condition. The results are consistent with the hypothesis that CSs must be associated with a common temporal context for secondary extinction to occur.
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English, Rebecca Maree. « Internationalising Australian Secondary Education ». Thesis, Griffith University, 2013. http://hdl.handle.net/10072/367966.
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This thesis presents the findings of a case study of international students who enrol in Australian secondary schools. Specifically, it focuses on the ways that staff in three schools and two international colleges position Eastern Asian international students through discourses of cultural difference. It draws together the Discourse Historical Approach to Critical Discourse Analysis with the work of Basil Bernstein and Pierre Bourdieu. The study finds that groups of students are positioned positively or negatively depending on their relationship to the dominant discourses of the Australian school.
Australian students, while rarely mentioned, were positioned positively. By contrast, the Eastern Asian international students were positioned negatively in relation to the privileged discourses of Australian schooling. These discourses reflected the cultural capital that was valued in the schools. In particular, the cultural capital of active and willing engagement in competitive sports and being rough, rugged and an ‘ocker’ were privileged at the schools. International students from Papua New Guinea, and a few
Eastern Asian students who behaved as ockers, were positioned positively because they realised cultural capital that was valued at the schools. By contrast, the students who were unable to be positioned through these discourses, because they did not realise cultural capital that was valued, were not viewed favourably. As a result, the data showed that there was a hierarchy of positions at the schools that were constructed in staff accounts. The analysis of data suggests that only some students are positioned favourably in Australian schools. The students who were already able to construct
privileged Australian school discourses were positioned positively.Thesis (PhD Doctorate)
Doctor of Philosophy (PhD)
School of Education and Professional Studies
Arts, Education and Law
Full Text
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English, Rebecca M. « Internationalising Australian secondary education ». Thesis, Griffith University, 2012. https://eprints.qut.edu.au/61416/1/Internationalising_Australian_Secondary_Education.pdf.
Texte intégralRésumé :
This thesis presents the findings of a case study of international students who enrol in Australian secondary schools. Specifically, it focuses on the ways that staff in three schools and two international colleges position Eastern Asian international students through discourses of cultural difference. It draws together the Discourse Historical Approach to Critical Discourse Analysis with the work of Basil Bernstein and Pierre Bourdieu. The study finds that groups of students are positioned positively or negatively depending on their relationship to the dominant discourses of the Australian school. Australian students, while rarely mentioned, were positioned positively. By contrast, the Eastern Asian international students were positioned negatively in relation to the privileged discourses of Australian schooling. These discourses reflected the cultural capital that was valued in the schools. In particular, the cultural capital of active and willing engagement in competitive sports and being rough, rugged and an ‘ocker’ were privileged at the schools. International students from Papua New Guinea, and a few Eastern Asian students who behaved as ockers, were positioned positively because they realised cultural capital that was valued at the schools. By contrast, the students who were unable to be positioned through these discourses, because they did not realise cultural capital that was valued, were not viewed favourably. As a result, the data showed that there was a hierarchy of positions at the schools that were constructed in staff accounts. The analysis of data suggests that only some students are positioned favourably in Australian schools. The students who were already able to construct privileged Australian school discourses were positioned positively. The data suggest that the majority of the Eastern Asian students were represented through negative discourses because they did not realise cultural capital that was valued at the schools. Findings of this study may assist schools to identify international students who may experience their Australian school education negatively. The findings may also contribute to assisting staff to better engage with international students.
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Nzuki, Charles Kyalo. « Kenya's Constituency Development Fund, Free Secondary Education Policy, and Access to Secondary Education ». Thesis, Walden University, 2017. http://pqdtopen.proquest.com/#viewpdf?dispub=10686052.
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The effects of the Constituency Development Fund (CDF) and the Free Secondary Education Policy (FSEP) on access to secondary school education in Kenya’s Yatta sub-county have not been adequately explored in available public policy literature. Hence, this qualitative multiple-case study was designed to understand the effects of the 2 policies on both enrollment and dropout among secondary school age children in Yatta. The study was conducted in 1 mixed-boarding secondary school and 1 secondary day school in Yatta. The study was built on an adapted Huisman and Smits’ theoretical model on dropout among students in developing countries. The data were gathered through semi-structured interviews with 14 purposefully selected participants: 2 principals, 2 deputy principals, and 10 parents whose children had benefited from the CDF bursary scheme. Interview data were inductively coded and then subjected to Braun and Clarke’s thematic analysis procedure, which aided in identification, analysis, and reporting of patterns (themes) in the data. Results showed that the CDF had contributed significantly to the improvement of enrollment with the establishment of new day schools that are more affordable, hence making secondary school education less costly and thus more available to low income families. The study’s findings also showed that student dropout had declined with both the CDF and FSEP. The positive social change implications of this study are that it provides evidence for advocacy among policy makers for increased allocation of resources to the education sector through the CDF and FSEP. Increased allocations will contribute to Kenya’s progress toward universal access to secondary education.
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Daniels, Holger von. « Private Equity Secondary Transactions : Chancen und Grenzen des Aufbaus eines institutionalisierten Secondary Market / ». Wiesbaden : Dt. Univ.-Verl, 2004. http://www.gbv.de/dms/zbw/391540912.pdf.
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Nzuki, Charles Kyalo. « Kenya's Constituency Development Fund, Free Secondary Education Policy, and Access to Secondary Education ». ScholarWorks, 2018. https://scholarworks.waldenu.edu/dissertations/4664.
Texte intégralRésumé :
The effects of the Constituency Development Fund (CDF) and the Free Secondary Education Policy (FSEP) on access to secondary school education in Kenya's Yatta sub-county have not been adequately explored in available public policy literature. Hence, this qualitative multiple-case study was designed to understand the effects of the 2 policies on both enrollment and dropout among secondary school age children in Yatta. The study was conducted in 1 mixed-boarding secondary school and 1 secondary day school in Yatta. The study was built on an adapted Huisman and Smits' theoretical model on dropout among students in developing countries. The data were gathered through semi-structured interviews with 14 purposefully selected participants: 2 principals, 2 deputy principals, and 10 parents whose children had benefited from the CDF bursary scheme. Interview data were inductively coded and then subjected to Braun and Clarke's thematic analysis procedure, which aided in identification, analysis, and reporting of patterns (themes) in the data. Results showed that the CDF had contributed significantly to the improvement of enrollment with the establishment of new day schools that are more affordable, hence making secondary school education less costly and thus more available to low income families. The study's findings also showed that student dropout had declined with both the CDF and FSEP. The positive social change implications of this study are that it provides evidence for advocacy among policy makers for increased allocation of resources to the education sector through the CDF and FSEP. Increased allocations will contribute to Kenya's progress toward universal access to secondary education.
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Li, Fung-yee, et 李鳳儀. « Implementing student self-assessment in a secondary four writing classof a local secondary school ». Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1998. http://hub.hku.hk/bib/B31944863.
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Sunley, Rosalind Clare. « Realising the spiritual dimension in secondary education : listening to the voice of secondary teachers ». Thesis, University of Bristol, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.430170.
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Li, Libing. « Strategies for secondary ion yield enhancements in focused ion beam secondary ion mass spectrometry ». Thesis, Imperial College London, 2010. http://hdl.handle.net/10044/1/11806.
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Cicek, Ibrahim. « Investigation Of Secondary School Students ». Master's thesis, METU, 2004. http://etd.lib.metu.edu.tr/upload/2/12605722/index.pdf.
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The purpose of the study was to investigate secondary school students&rsquoperformance on proof and attitude towards proof in geometry. The research was conducted on 367 10th grade students. The numbers of subjects were 94, 96, 90 and 87 from General High Schools (GHS), Anatolian High Schools (AHS), Science High Schools (SHS) and Private High Schools (PHS) respectively. The number of girls and boys were 142 and 225 respectively. To obtain the data of this study, the following measuring instruments were utilized: 1.Proof Performance in Geometry Test (PPGT)
2.Proof Attitude Scale in Geometry (PASG). They were developed by researchers. The results indicated that: 1.There were statistically significant differences among the mean scores of students enrolled in different school types with respect to performance on proof in geometry
2.There was no statistically significant difference between the mean scores of boys and girls with respect to performance on proof and attitude towards proof in geometry
3.There were no statistically significant differences among the mean scores of students enrolled in different school types with respect to attitude towards proof in geometry
4.There was statistically significant correlation between secondary school students&rsquo
performances on proof and attitude towards proof in geometry
5.While students in SHS got the highest scores from each question, students in GHS got the lowest scores
6. While most students in SHS perceived themselves as successful in geometry, most students in GHS perceived themselves unsuccessful.
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Cooper, David John. « Secondary liability for civil wrongs ». Thesis, University of Cambridge, 1996. https://www.repository.cam.ac.uk/handle/1810/251586.
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Ramaswamy, Alba Lalitha. « Laser ignition of secondary explosives ». Thesis, University of Cambridge, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.309149.
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O'Grady, Kevin. « Motivation in secondary religious education ». Thesis, University of Warwick, 2006. http://wrap.warwick.ac.uk/2848/.
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I show how my previous MA research indicated useful data regarding motivation in secondary school Religious Education (RE) but needed augmented theoretical and empirical substance to inform a general pedagogy (chapter 1): to this end I address issues of adolescent agency and identity (chapter 2) and creativity (chapter 3). Draft recommendations for an active, creative, existential and hermeneutical RE pedagogy result from these augmentations (chapter 2, revised in chapter 3). The heart of this thesis is a classroom-based empirical study designed to apply and assess my recommendations for RE practice. I argue action research and ethnographic strategies fit for my field study purposes (chapter 4). I then present and analyse my field study data, identifying categories of student motivation in RE, namely dialogue with difference, existential or ethical interest and personal significance. These categories are seen to be highly compatible with my earlier draft recommendations for RE practice (chapters 5, 6, 7 and 8). Next, I integrate my data into a critique of Andrew Wright’s religious literacy pedagogy, arguing that Wright’s oppositions of language to experience and intrinsic to pragmatic value are misleading, but conceding that his fundmental principles are sound and that his recent theory overcomes some earlier difficulties. This includes consideration of Ninian Smart’s phenomenological Religious Studies and John Dewey’s educational philosophy. I go on to re-affirm that dialogue with difference, existential or ethical interest and personal significance are basic to what motivates RE pupils. Therefore, effective RE requires hermeneutical learning, including attention to the development of pupils’ own ideas and values over time; action research indicates ways for teachers to handle this requirement (chapter 9).
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Poon, Wai-hoi Bobby, et 潘維凱. « Geometry reasoning of secondary students ». Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2009. http://hub.hku.hk/bib/B4439102X.
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McConaghy, Paul M. « Secondary hyperalgesia and postoperative pain ». Thesis, Queen's University Belfast, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.387878.
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Tsavalos, Alexander John. « Production of microalgal secondary carotenoids ». Thesis, Liverpool John Moores University, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.337891.
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Karikas, G. A. « Secondary metabolites of Ericaceae species ». Thesis, University of Manchester, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.377664.
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Martinez-Insua, Marta. « Secondary structure of synthetic oligopeptides ». Thesis, University of Strathclyde, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.248697.
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Wall, Johanna Martine. « Trauma-induced secondary cardiac injury ». Thesis, Queen Mary, University of London, 2018. http://qmro.qmul.ac.uk/xmlui/handle/123456789/43998.
Texte intégralRésumé :
Trauma-induced secondary cardiac injury (TISCI) represents an under recognised complication of severe injury with haemorrhage. A limited number of clinical studies have supported the development of adverse cardiac events, such as arrhythmia, in association with biomarker proven TISCI. Pre-clinical studies using small animal models have provided insights into potential mechanisms and key effector molecules involved in the development of TISCI, but there remains a general lack of understanding regarding the in vivo functional implications of this indirect cardiac injury resulting from trauma-haemorrhage. This project aimed to investigate the implications of cardiac injury on myocardial systolic function. A robust, translatable model of TISCI was developed, which reflected the cardiac biomarker profile identified in clinical studies and, for the first time, demonstrated a significant, dose-dependent rise in Heart-type Fatty Acid Binding Protein (H-FABP) in response to trauma-haemorrhage. Non-invasive echocardiography was used to determine the acute myocardial response to injury and haemorrhage and also to assess the response of the left ventricle to resuscitation after an antecedent 60-minute period of trauma-haemorrhage. The functional studies presented here have enabled real time visualisation of the impact of trauma-haemorrhage upon systolic left ventricular function over 1 to 6 hours, both with and without resuscitation. Having established the trends in in vivo systolic function over time, further studies were then conducted to test the combination of adenosine, lidocaine and magnesium (ALM) as a cardiovascular rescue agent in TISCI. ALM, as an adjunct to fluid resuscitation, has shown great promise as a therapeutic agent which improves haemodynamic outcomes, reduces the volume of resuscitation fluid required and favours survival in the murine model of TISCI.
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Stiles, Hugh Ninian. « Secondary reactions of pyrolytic tars ». Thesis, Imperial College London, 1987. http://hdl.handle.net/10044/1/46671.
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Francis, Andrew Frank. « Followership among secondary school teachers ». Thesis, University of Birmingham, 2016. http://etheses.bham.ac.uk//id/eprint/6760/.
Texte intégralRésumé :
Today, it is encouraging that followership is regarded as a factor within the leadership equation. However, research attention on followership overall is limited and within the field of education, its study remains firmly in the shadows. Indeed, a search for published followership-centric research carried out in this field revealed just 17 studies worldwide, with Thody’s contribution (2003) the sole point of reference within the UK. This study contributes to this limited body of research by exploring the followership of schoolteachers working in the secondary education sector. Using Gronn’s Career Model (1999) as a framework to understand why teachers follow, the study used biographical-style interviews (n=15) to reveal factors that have shaped the agency of schoolteachers, influencing their journeys to followership. In addition, the study administered Kelley’s (1992) Followership Questionnaire in order to understand how teachers follow (n=69). Factors found to influence why teachers follow included the role of parents, schooling and of key people and these findings align with research carried out on the career journeys of senior educational leaders. In addition, the combined insight drawn from the quantitative and qualitative data revealed a predominance of exemplary followership among the teachers. The study suggests that this approach to followership is dominant among teachers due to them being engaged in leadership practice, both within and beyond the classroom. Further, that teachers’ commitment to task, enhanced through working in a profession that enables them to satisfy important personal values and beliefs, also encourages the practice of exemplary followership.
36
Dickerson, Jeffrey Crawford. « Frequency domain secondary pulse estimation ». Thesis, Massachusetts Institute of Technology, 1995. http://hdl.handle.net/1721.1/36983.
Texte intégralRésumé :
Thesis (M. Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1995.Includes bibliographical references (leaves 44-45).
by Jeffrey Crawford Dickerson.
M.Eng.
37
Chan, Wilson John. « The Alewife secondary storage subsystem ». Thesis, Massachusetts Institute of Technology, 1994. http://hdl.handle.net/1721.1/34095.
Texte intégralRésumé :
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1994.Includes bibliographical references (leaves 41-42).
by Wilson John Chan.
M.S.
38
Brown, M. C. « Causation, colour and secondary qualities ». Thesis, University College London (University of London), 2012. http://discovery.ucl.ac.uk/1377108/.
Texte intégralRésumé :
This thesis examines Price and Menzies’ defence of an agential theory of causation by analogy with the dispositional theory of colour, and their claim that causation should be treated as a secondary quality. Exploration of the objections to their theory that Price and Menzies discuss shows that causation should not be treated as a secondary quality. These objections are that the agential theory of causation confuses metaphysics with epistemology, that it is unavoidably circular, that it cannot account for causation in cases where agential manipulation is impossible, and that it is unacceptably anthropocentric. It is argued that although understanding causation as a secondary quality is supposed by Price and Menzies to solve these problems, this understanding does not in fact provide adequate responses to the four objections, and hence that treating causation as a secondary quality is under-motivated. It is argued, however, that the analogy made between causation and colour is nevertheless useful, because an idea from a different theory of colour presents a better option for understanding causation. This alternative idea uses agency, but does not bring the disadvantage of making causation metaphysically dependent on agency. The alternative idea is built on the argument for selectionism about colour. It is ultimately argued that although causation is not a secondary quality, it may yet be a tertiary quality.
39
Davison, Angus. « DNA secondary structure in vivo ». Thesis, University of Edinburgh, 1994. http://hdl.handle.net/1842/13599.
Texte intégralRésumé :
Long DNA palindromes cannot be propagated in wild-type Escherichia coli. Either a replicon with a long DNA palindrome is so poorly replicated that it is available, or the palindrome itself is unstable so that it undergoes partial or complete deletion. The deleterious effect of long DNA palindromes is alleviated in strains mutant for sbsC and D: each mutation by itself is necessary and sufficient to allow the plating of a λ phage containing a long palindrome. In this thesis, the mechanism by which long DNA palindromes cause inviability is studied, and it is discussed whether inviability is a consequence of an unusual DNA structure. An analysis of the effects of palindromic central asymmetry on the propagation of a λ phage across a broad range of E. coli host strains is described. Palindromes carrying an 8bp asymmetry confer a less severe phenotype than do perfect palindromes, arguing that a centre-dependent pathway for palindrome-mediated inviability exists that is independent of the host strain. For further study, a set of long DNA palindromes with paired changes in the central sequence was constructed in bacteriophage λ. Identical palindrome centres were previously used by others to test the S-type model for cruciform extrusion in vitro. The plaque areas produced by the palindrome-containing λ phage were compared on an E. coli sbsC lawn. Central sequence changes had a greater effect upon the plaque area than peripheral changes, implying that the residual palindrome-mediated inviability in E. coli sbcC is centre-dependent and could be due to the formation of a cruciform structure. The results argue strongly that intrastrand pairing within palindromes is critical in determining their effects in vivo.
40
Baker, Cynthia Joanne. « Motivating Secondary Students to Write ». UNF Digital Commons, 1989. http://digitalcommons.unf.edu/etd/45.
Texte intégralRésumé :
This is a study which examines motivation and its implications for the secondary student writer. Included in the study is a synthesization of writing research with a multi-faceted curriculum. The study concludes by challenging teachers to acquire a theory of teaching writing based upon knowledge of research and instructional practices related to that theory.
41
Islam, Md Nasrul. « A Balanced Secondary Structure Predictor ». ScholarWorks@UNO, 2015. http://scholarworks.uno.edu/td/1995.
Texte intégralRésumé :
Secondary structure (SS) refers to the local spatial organization of the polypeptide backbone atoms of a protein. Accurate prediction of SS is a vital clue to resolve the 3D structure of protein. SS has three different components- helix (H), beta (E) and coil (C). Most SS predictors are imbalanced as their accuracy in predicting helix and coil are high, however significantly low in the beta. The objective of this thesis is to develop a balanced SS predictor which achieves good accuracies in all three SS components. We proposed a novel approach to solve this problem by combining a genetic algorithm (GA) with a support vector machine. We prepared two test datasets (CB471 and N295) to compare the performance of our predictors with SPINE X. Overall accuracy of our predictor was 76.4% and 77.2% respectively on CB471 and N295 datasets, while SPINE X gave 76.5% overall accuracy on both test datasets.
42
Yeo, Kei Choo Patricia. « Communication in Singapore secondary schools ». Thesis, University of Leicester, 2003. http://hdl.handle.net/2381/30835.
Texte intégralRésumé :
This study sought to gain some insights into the communication system in Singapore secondary schools, particularly the so-called 'neighbourhood schools', larger in number than the independent or the autonomous schools. The dearth of research on communication in Singapore schools makes it timely for this study to be undertaken, with electronic communication or e-mail, as a communication tool. This is probably the result of, among other factors, the implementation of the IT Masterplan in Education (Teo, 1997), and the concept of Thinking School, Learning Nation (TSLN, 1997), both national initiatives, which have shaped the communication process in schools, with attendant influences such as school organisation, communication climate and school culture (Refer to Table 7, p. 125). In this study, both quantitative and qualitative data were collected. 152 self-reporting questionnaires, (Appendix B), each with an introductory letter explaining the purpose and scope of the survey, were sent to teachers of three secondary schools. The principals consented to the administration of the questionnaire in their schools. Of these, 117 questionnaires were returned. However, two were incomplete, and thus, invalid. Findings were based on the responses in the remaining 115 questionnaires, which constituted 75.66% of the questionnaires sent out. The Statistical Package for the Social Sciences, SPSS, was used to generate the statistical tables, for frequency, correlations and, Analysis of Variance, ANOVA. The Cronbach alpha on the 185 items in the questionnaire was 0.97 and, for the standardized items, the reliability was 0.96. Qualitative data was gathered by means of person-to-person interviews, based on the Interview Schedule (Appendix C). Teachers' responses served as corroboration of the quantitative data gathered from the survey, and enhanced the research study on the communication climate in their schools. They also highlight how the national policy above has shaped, not only the culture, covered in the survey, but also the climate in which sharing and transfer of information take place, amidst a hierarchical organisational structure, with its authority vested mainly in the Principals and Vice-Principals. Grounded in this set-up is a highly work-oriented cultural ethos, envisioned with the ultimate 'value-addedness' in the performance of the pupils. Such is the communication climate and culture that information flows mainly downwards. Hence, message content would inherently be directives from school management - the Principals, Vice-Principals and the HODs to the teaching staff. Also highlighted was the use of the e-mail as a communication medium. While the younger teachers are computer-literate, the more senior experienced teachers voiced their concerns with IT-phobia, and see IT as a hindrance to communication. Organisational structure and IT-phobia are both issues to be managed for improvements to the communication process in Singapore schools.
43
Earle, Donald Maurice. « Art examination in secondary schools ». Thesis, University College London (University of London), 1986. http://discovery.ucl.ac.uk/10019626/.
Texte intégral
44
Masad, Jamal A. « Secondary instabilities of boundary layers ». Diss., Virginia Tech, 1990. http://hdl.handle.net/10919/37867.
Texte intégralRésumé :
Several aspects of the subharmonic instability of boundary layers are studied. First, the subharmonic instability of incompressible flows over a flat plate is investigated using the resonant triad model and the Floquet model. The primary wave is taken in the form of a two-dimensional (2-0) Tollmien-Schlichting (T-S) wave. The subharmonic wave is taken in the form of a three-dimensional (3-D) wave. Results from both models are presented and compared with the experimental data and numerical simulation. It is found that the results of the Floquet model are in good agreement with the experimental data and numerical simulation, whereas the results of the resonant triad model agree only qualitatively with the experimental data.
Second, the subharmonic instability of incompressible flows over a 2-0 hump is studied using the Floquet model. The mean flow over the hump is calculated by using interacting boundary layers, thereby accounting for viscid/inviscid interactions. The results show that increasing the hump height results in an increase in the amplification factors of the primary and subharmonic waves. When the hump causes separation, the growth rates of both the primary and subharmonic waves are considerably larger than those obtained in the case of no separation.
Third, the subharmonic instability of compressible boundary layers over a flat plate is studied using the Floquet model. Results are presented for adiabatic wall boundary conditions and subsonic, transonic, and supersonic flows. For supersonic flows results are presented for first- and second-mode primary waves. The effect of Mach number, spanwise wavenumber, primary-wave amplitude, Reynolds number, and frequency are studied.
Fourth, results for the effect of heat transfer on the subharmonic instability of a two-dimensional compressible boundary layer over a flat plate are presented for different Mach numbers. For supersonic flows results are presented for first- and second-mode waves. The effect of different levels of heat transfer on changing the features of the subharmonic compressible instability is evaluated.
Fifth, results for the effect of suction on the subharmonic instability of a two-dimensional compressible boundary layer over a flat plate are presented. It is found that when the primary wave is a first-mode merging with a second-mode, the subharmonic wave is strongly destabilized by suction.
Sixth, the effect of a bulge on the subharmonic instability of compressible boundary layers is studied. It is found that the effect of compressibility on reducing the growth rate of the disturbances weakens as the hump height increases.Ph. D.
45
Shanks, Sarah M. « Re:Visions : A Mother's Secondary Images ». Ohio University / OhioLINK, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1417785128.
Texte intégral
46
Sethi, Shipra. « Secondary microseisme Love wave generation ». Thesis, Université de Paris (2019-....), 2019. https://theses.md.univ-paris-diderot.fr/SETHI_Shipra_va2.pdf.
Texte intégralRésumé :
Le bruit sismique est l'oscillation continue de la Terre enregistrée à chaque station en l'absence de tremblement de terre. Il résulte de l'interaction entre l'atmosphère, les océans et la terre solide. Le signal dominant, appelé microséismes secondaires dans la bande de fréquences 0,1-0,3 Hz, a pour origine l'interaction non linéaire entre des ondes de gravité océaniques de même fréquence et de directions opposées. Les fluctuations de pression qui en résultent près de la surface de l'océan génèrent un signal sismique. Le signal dominant est constitué d'ondes de Rayleigh (R). Plusieurs études montrent également l'existence d'ondes de Love (L) mais le rapport d'amplitude L/R entre les ondes de Love et de Rayleigh varie en fonction de la zone étudiée. Le mécanisme de génération des ondes de Rayleigh dues à l'interaction de ces sources de bruit avec le fond marin est bien compris et modélisé. Cependant, le mécanisme de génération des ondes de Love reste mystérieux car une source dans l'océan ne peut pas générer de mouvement de cisaillement. Dans ce travail, nous montrons l'existence d'ondes de Rayleigh et Love enregistrées par le réseau de l'Alaska et de la Californie. Nous étudions ensuite l'effet de la pente océan-continentale sur l'amplitude du bruit sismique des microséismes secondaires et quantifions la conversion des ondes de Rayleigh et de Love. Pour ce faire, nous utilisons la méthode des éléments spectraux pour simuler numériquement le champ d'ondes sismiques dans les milieux 3D. L'objectif est de déterminer les facteurs qui ont une influence sur l'amplitude des ondes de Love enregistrées sur le continent dans la bande de fréquences 0,1-1 Hz. Ces facteurs sont a) l'épaisseur de l'océan, b) l'effet de site à la source, c) la présence d'une couche sédimentaire sous le fond océanique et d) l'angle de la pente océan-continent. Nous observons que des ondes de Love peuvent être générées à la frontière océan-continental, et que la variation de leur amplitude dépend de la fréquence. La plus forte amplitude des ondes de Love est enregistrée dans un modèle avec 6 km d'océan, 6 km de croûte et 10 km de manteau à des fréquences de résonance dans l'océan lorsque la source est loin de la côte. Cependant, à d'autres fréquences, les océans peu profonds et les sources proches de la frontière de la ocean-continent generent des ondes de Love d'amplitude maximale. En présence de sédiments, l'amplification de Love est plus élevée à des périodes plus courtes pour les deux sources. La réduction de l'angle de pente diminue l'amplitude de l'onde de Love. Pour les sources proches et éloignées de la frontière océan-continent, le rapport d'amplitude L/R varie fortement selon la fréquence et l'épaisseur de l'océan. Parmi tous les facteurs, les rapports d'amplitude L/R les plus élevés sont générés dans les sédiments lorsque la source est proche de la frontièreSeismic noise is the continuous oscillation of the Earth recorded at every station in the absence of earthquakes . The interaction of atmosphere, ocean waves and earth creates them. The dominant signal, called secondary microseisms in the frequency band 0.1-0.3 Hz have known to be formed due to the non-linear interaction between two oppositely traveling ocean gravity waves. The resulting pressure fluctuations close to the ocean surface generates a seismic signal which is dominantly Rayleigh waves (R). Many authors reported the observations of Love wave content (L) in the seismic signal. However the L/R amplitude ratio is shown to vary depending on the area investigated. The generation mechanism of Rayleigh waves due to these noise sources interacting with the sea-bottom is well understood and modeled. The explanation why Love waves are generated is unclear because the source in the ocean cannot generate shear motion. We have shown the existence of Rayleigh and Love waves recorded by the Alaska and California network. We then investigate the effect of ocean-continental slope boundary on the seismic noise amplitude of secondary microsiesm and quantify the Rayleigh-to-Love wave conversion. In order to do that, we use the spectral element method to numerically simulate the seismic wave field in 3D media. The primary focus of this study is on investigating several factors that can influence the seismic noise amplitude recorded on the continent in the frequency band 0.1-1 Hz. Those factors are a) the ocean-thickness, b) the source-site effect i.e., source close to the boundary and far from the boundary, c) the sedimentary layer beneath the sea-bottom and d) the effect of ocean-continental slope angle. We observe that Love waves can be generated at the ocean-continental boundary, however the amplitude change is frequency dependent. We observe energy in the transverse direction in a model that cannot generate Love waves as a result of conversion at the ocean-continental slope boundary. The strongest Love wave amplitude is recorded in a model with 6 km deep ocean at resonant frequencies in the ocean when the source is far from the coast. However at other frequencies, shallow oceans and source close to the boundary generates highest Love wave amplitude. In the presence of sediments, the amplification of Love waves is higher at shorter periods for both sources. The reduction in slope angle diminishes the Love wave amplitude. For both source close and far from the boundary, the L/R amplitude ratio vary strongly with frequency and ocean thickness. Among all the factors, highest L/R amplitude ratios are generated due to sediments when the source is close to the boundary
47
Välikangas, T. (Taru). « Secondary materials in water treatment ». Master's thesis, University of Oulu, 2017. http://urn.fi/URN:NBN:fi:oulu-201702071114.
Texte intégralRésumé :
In the World the availability of the clean drinking water is a serious problem. The appearance of this problem is different in developed and developing countries. Even though water treatment technologies are widely studied and improved, the developing countries do not have the same economic capacities to utilize the sufficient treatment methods. This thesis concentrates on the utilization of secondary materials in water treatment as adsorbents. These materials are potential for the low-cost treatment of water. For the testing of the secondary materials, two pollutants were chosen as model compounds: organic pharmaceutical diclofenac and inorganic arsenic As(V), since they have been recognized to be problematic in water treatment. Two industrial by-products were chosen as secondary materials to be tested as adsorbents. Sachtofer is a by-product from titanium dioxide TiO2 production and Red mud is a waste material originating from aluminium oxide Al2O3 production. Third material tested was sand from Brazil obtained via cooperation with the Federal Institute of Goias in Goiania, Brazil. In this thesis a commercial adsorbent CFH-12 (Kemira) was chosen as a reference material. The literature part of the thesis contains theoretical considerations on the utilization of adsorption in water treatment. In addition the effect of organic and inorganic impurities in water bodies are discussed in a general level. The experimental part of the thesis presents first the characterization results of the secondary materials. The specific surface areas (BET) were measured for all the secondary materials. The surface structures were studied with scanning electron microscopy (SEM). For some of the adsorbents, the pH of the point of zero charge was determined as well as the elemental composition with XRF. One part of this thesis concentrated on studying the effect of pre-treatment on the adsorption efficiency of the materials. In this case, the adsorption materials were washed with distilled water and treated with hydrochloric acid. The adsorption experiments were carried out as batch experiments. Diclofenac concentration during the experiments was analyzed with spectrophotometry and HPLC. The best removal, i.e. 16% of diclofenac was achieved with HCl-activated Brazilian sand. With Red mud the HCl-activated sample was the most effective with 8% removal. The HCl-activated Sachtofer removed only 4% of diclofenac. The change in the arsenic concentration during the experiments was analyzed by ICP-MS. With Sachtofer, all three pre-treated samples removed 100% of arsenic. All Red mud and Brazilian sand samples were able to remove arsenic in significant amount. Though, after HCl-activation, the removal of arsenic was higher giving 98% for Red mud and 100% for the Brazilian sand. The diclofenac removal was assumed to be difficult and the 16% removal was a quite good result. The problem seems to be too high pH. By adjusting pH to a lower level, the higher removal efficiency might be achievable. All arsenic removal results were promising, and with all the material samples the removal was higher than 90%. These results confirm that the secondary materials are potential adsorbents for in water treatment. With certain adsorbents, the removal was high even without any pre-treatment. This is economically interesting possibility that should be studied more, especially due to the possibility of improving the water treatment in developing countriesPuhtaan juomaveden puute on todellinen ongelma maailmassa. Se on ongelma jossa erityisesi kehittyvät ja kehittyneet maat ovat eriarvoisessa asemassa. Vaikka vedenpuhdistusprosesseja tutkitaan paljon ja ne ovat pitkälle kehittyneitä, ei kehittyvillä mailla ole välttämättä taloudellisia resursseja hyödyntää riittävää vedenpohditus tekniikkaa. Tässä työssä on tutkittu kierrätysmateriaalien hyötykäyttöä adsorbentteinä vedenpuhdistuksessa. Puhdistettaviksi malliaineeksi valittiin orgaaninen lääkeaine diklofenakki sekä epäorgaaninen arseeni As(V), koska niiden on havaittu aiheuttavan ongelmia nykyisissä vedenpuhdistusprosesseissa. Adsorptiomateriaaleina tässä työssä käytettiin teollisuuden sivutuotteina syntyneitä Sachtoferia joka on titaanidioksidin valmistuksen sivutuote, sekä punaliejua, joka alumiinioksidin valmistuksessa syntynyttä jätemateriaalia. Kolmantena materiaalina testattiin Brasilialaista -hiekkaa, jota saatiin tutkimustarkoituksiin yhteistyön kautta, Federal Institute of Goias, Goiania, Brasilia toimittamana. Työhön haluttiin valita myös yksi kaupallinen adsorptiomateriaali joka toimisi referenssimateriaalina, ja tämän vuoksi valitsimme adsorptiomateriaaliksi Kemiran CFH-12 -tuotteen. Työn kirjallisuus osiossa selvitetään adsorption teoriaa sekä sen hyödyntämistä vesienpuhdistuksessa. Myös orgaanisen ja epäorgaanisten haitta-aineiden vaikutuksia veden laatuun tarkastellaan yleisellä tasolla. Kokeellisen osan alussa työssä käytettyjen adsorbenttien ominaisuuksia tutkittiin erilaisilla menetelmillä, joilla arvioitiin materiaalien kykyä adsorboida malliaineita. Materiaaleille määritettiin mm. pH jossa materiaalin pintavaraus on nolla (point of zero charge). Lisäksi materiaaleille tehtiin BET-analyysi ominaispinta-alan selvittämiseksi ja niiden pintaa ja rakennetta tutkittiin elektronimikroskoopilla. Osalle aineista tehtiin myös alkuaineanalyysi. Työssä haluttiin myös tutkia vaikuttaisiko materiaalien esikäsittely adsorptiotehokkuuteen. Tämän vuoksi adsorptiomateriaaleja pestiin tislatulla vedellä sekä käsiteltiin suolahapolla. Adsorptiokokeet toteutettiin laboratoriomittakaavassa panoskokeina. Diklofenakin pitoisuutta seurattiin kokeen aikana spektrofotometrillä sekä HPLC analyysi menetelmällä. Paras tulos diklofenakin poistossa saatiin HCl -aktivoidulla Brasilialaisella hiekalla, jolloin poistuma oli 16 %. Punaliejulla käsitellyistä näytteistä paras poistuma, 8 %, saatiin myös HCl -aktivoidulla näytteellä. HCl -aktivoidulla Sachtoferilla poistuma oli vain 4 %. Arseenin pitoisuuden muutosta kokeen aikana analysoitiin ICP-MS menetelmällä. Kaikkilla kolmella Sachtofer -näytteellä arseenin poistuma oli 100 %. Kaikki punalieju ja Brasilialainen hiekka näytteet adsorboivat arseenia merkittävästi. Kuitenkin HCl -käsitellyillä näytteillä poistuma oli paras, punaliejulle 98 % ja Brasilialaiselle hiekalle 100 %. Diklofenakin poistamisen vedestä oletettiin olevan haastavaa, ja saavutettu 16 % poistuma oli hyvä tulos. Ongelmana diklofenakin poistossa oli todennäköisesti liian korkea pH ja mikäli pH:ta onnistutaan säätämään enemmän happamaksi, poistuma voisi olla korkeampi. Arseenin adsorptio kokeiden tulokset olivat todella lupaavia, ja kaikilla materiaaleilla poistuma oli vähintään 90 %. Näiden tulosten perusteella voidaan todeta että kierrätysmateriaalit ovat hyvin potentiaalinen vaihtoehto vedenkäsittelyadsorbenteiksi. Osa materiaaleista toimi arseenin poistossa tehokkaasti myös ilman esikäsittelyä. Tämä on taloudelliselta kannalta mielenkiintoinen tulos, jota tulisi tutkia lisää, erityisesti kehittyvien maiden vedenpuhdistuksen tehokkuuden parantamiseksi
48
Harwood, Cary P. « Optimizing secondary tailgate support selection ». Thesis, This resource online, 1996. http://scholar.lib.vt.edu/theses/available/etd-09182008-063231/.
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49
Zimmermann, Heinz. « Reversibility of secondary biliary cirrhosis / ». [S.l.] : [s.n.], 1997. http://www.ub.unibe.ch/content/bibliotheken_sammlungen/sondersammlungen/dissen_bestellformular/index_ger.html.
Texte intégral
50
Mophosho, Eunice Dorah. « Workload allocation in secondary schools ». Diss., University of Pretoria, 2014. http://hdl.handle.net/2263/45880.
Texte intégralRésumé :
The purpose of this study was to explore workload allocation, what informed workload
allocation in secondary schools and analyse documents relevant to educator workload.
A qualitative interpretive approach using a case study as a research design was used to
complete the study. Sixteen educators which consist of 6 heads of departments,
principal and 9 post level one educators were purposively sampled and interviewed
from different types of schools( rural, township and former model C schools).
The findings of the study suggested that, workload in the secondary schools under
study was allocated in a transparent and flexible manner. Educators were consulted and
their inputs were regarded imperative in decision making. Further, it was found that
experience, specialisation and qualifications informed workload allocation in schools.
During the analysis of data, themes such as educator reputation meaning their
competence, learner results and commitment emerged as factors that also informed
workload allocation in schools. Allocators considered factors like the number of
subjects, number of preparations and number of classes but ignored the number of
learners in classes when allocating work in schools. Therefore, the differences in terms
of number of learners would mean there was no equity in allocation of educators
because the number of learners affected marking of assessments, feedback to learner,
reaching gifted and not gifted learners, discipline in classrooms, timeous submissions of
marks, and regular control of learner books.
Majority of educators were allocated teaching time below the requirements as stipulated
in the Personnel Administration Measures (PAM) Government Gazette No. 24948 dated
21 February 2003. Therefore workload of most educators was manageable. The
majority of post level one educators were allocated teaching time below 85%. Only one
post level one educator from school A and B was allocated within the stipulated
teaching time as expected by the department and most educators were allocated below.
From the allocation of school C only 3 post level one educators out of a maximum of
twenty five paid by the government were allocated within the stipulated time. Allocation
changed throughout the year because promotions and redeployment of educators were
done at any time during the year.Dissertation (MEd)--University of Pretoria, 2014.
tm2015
Education Management and Policy Studies
MEd
Unrestricted