Дисертації з теми "Degree programmes"
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1
Chin, Che-yan Hannah. "A study on the emergence and development of associate degree programmes in Hong Kong." Click to view the E-thesis via HKUTO, 2007. http://sunzi.lib.hku.hk/hkuto/record/B38283190.
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2
Poulter, Grace D. "The learner identities of older adults engaged in higher degree programmes." Thesis, University of Glasgow, 2017. http://theses.gla.ac.uk/8847/.
Повний текст джерелаАнотація:
Doctoral students are often popularly portrayed as early career researchers and/or academics, engaged single mindedly in esoteric research projects; in other words, they are perceived as boffins. However much this may have been true (or not) in the past, this is certainly not the case in the 21st century. New routes to doctoral qualification have proliferated in recent years and with this growth and diversification the learner identities of the participants engaged in doctoral programmes has also broadened and diversified. Adopting a case study approach, based upon the narratives of 15 professional doctorate students who entered the programme over the age of 40, this study aimed to critically explore the reality of learner identities of these older adults engaged in higher degree study. This qualitative study has explored in depth and detail, the motivational factors driving this student group to embark upon a professional doctorate in mid- to later-life. The identities of these candidates have also been explored through the rich, qualitative data collected in the one-to-one semi-structured interviews that formed the basis of the project. Five significant findings resulted from the analysis and discussion of the qualitative data. The first was that a strength of the particular doctoral programme examined in the case study was that it offered people in mid- to later-life educational opportunities that may have been denied to the, for various reasons, at an earlier stage in the life-cycle. A second finding was that the professional doctorate was attractive to professional people because it provided a staged entry into academia and allowed the professional experience and competences of the candidates to become an integral part of the admissions procedures. The third finding related to the diverse learner identities of the participants. The fourth finding suggests that postgraduate study in general, and doctoral study in particular, can be life enhancing and provide measures of inclusion and social justice that may have been denied to people in earlier life. The study concluded on the fifth finding, that the professional doctorate would be improved by being embedded more firmly in a work-based or workplace learning approach which would further support the strong professional identities of the project participants.
3
Khoury, Ogareet. "Investigating the translation competence of graduates of Bachelor degree programmes in Jordan." Thesis, Aston University, 2017. http://publications.aston.ac.uk/31551/.
Повний текст джерелаАнотація:
This thesis investigates perceptions of competence held by graduates, translator trainers, and employers. Previous research in Jordan had revealed that graduates struggle to secure a job in translation because translator training programmes do not prepare them sufficiently enough to meet the market requirements (Shunnaq, 2009; Yousef, 2004, Al-Hamad, 2014). This research takes these initial studies further by using the PACTE multi-componential translation competence model (2000, 2003, 2011). The study was conducted at two different phases in consequential procedures, combining quantitative and qualitative analyses. It revealed that while the graduates mildly agree on the development of their translation competence, the teachers and the employers disagree on this development and perceive several ‘core competences’ as lacking in graduates. The study contributes to translator pedagogy in Jordan by providing detailed data on the competences that are underdeveloped in graduates relating them to the suggestions of the teachers on what needs to be stressed in the curriculum. Furthermore, it unveils the competences that are required the most by the employers versus those that are lacking in graduates. Based on the findings, the curriculum design can be amended to ensure more efficient programmes and thus a better development of translator competence. This study also contributes to research into translation competence development by arguing that competence is not only a defined notion or a multi-componential model. Competence is a perception that is governed by a socio-cultural and academic context. In a context where the experts themselves are lagging behind in research and where the stakeholders are working out of sync, the concept of translation competence still seems to be basically determined by the bilingual competence. Furthermore, the study also contributes to translation pedagogy by revealing that when the students’ role is suppressed, the students show poor ability to assess their development, thus over-estimate themselves.
4
Chin, Che-yan Hannah, and 錢芷欣. "A study on the emergence and development of associate degree programmes in Hong Kong." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2007. http://hub.hku.hk/bib/B38283190.
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5
Penceliah, Soobramoney. "The applicability of market orientation to selected degree programmes at technikons in KwaZulu-Natal / by Soobramoney Penceliaharket orientation to selected degree programmes at technikons in KwaZulu-Natal / by Soobramoney Penceliah." Thesis, North-West University, 2003. http://hdl.handle.net/10394/59.
Повний текст джерелаАнотація:
Since 1994, a number of higher education policy documents detailing the scope for
transformation and restructuring of education have been published. Diminishing financial support
from government, coupled with greater public demand for improved services necessitate
technikons to become innovative higher education institutions. The marketing concept, the
underlying platform of market orientation, was developed for commercial organisations. It is
proposed that this marketing philosophy could be extended to technikons. Technikons can learn
from the private sector about improving their service delivery by using market orientation
principles and concepts. The purpose of this study was to theoretically and empirically examine
and evaluate the applicability of market orientation to business studies degree programmes at
technikons in KwaZulu-Natal.
The study examined the opinions and perceptions of programme managers and graduates of
business studies degrees from technikons in KwaZulu-Natal. The literature evaluated the
developments in market orientation theory and practice, described the types and other relevant
issues pertaining to higher education institutions in South Africa, and the intluence of the
marketing environment on technikons in KwaZulu-Natal. The research was conducted using a
stratified random sample for graduates, and due to the relatively small size of sampling frame for
programmemanagers, it was decided to send out questionnaires to all programme managers. The
data for this study has been obtained by the analysis of the responses to questionnaires that were
administered among graduates and programme managers of business studies degrees from
technikons in KwaZulu-Natal. Questionnaires were grouped into four constructs of market
orientation, viz. intelligence generation, intelligence dissemination, response design and response
implementation for both categories of respondents.
The analysis of the results revealed important findings. The perceptions of programme managers
and graduates on levels of market orientation for business studies degrees are reported. The
diierence in the constructs between males and females for both programme managers and
graduates are analysed. The discrepancies between programme managers and graduates
expectations of service quahty are reported. Specific recommendations have been made which
can improve the levels of market orientation at technikons for business studies degrees.Thesis (Ph.D. (Business Management))--North-West University, Potchefstroom Campus, 2004.
6
Northrop, Mary. "Foundation degree programmes in health: perspectives of leaders and contributors across the UK." Thesis, Anglia Ruskin University, 2016. https://arro.anglia.ac.uk/id/eprint/700995/1/Northrop_2016.pdf.
Повний текст джерелаАнотація:
Academics are at the forefront of the inception, design and delivery of Fds and therefore are responsible for ensuring the aims are met, but their views on the award and the delivery of curricula have not been sought. Foundation degrees (Fds) were introduced in 2000 and although courses have been evaluated, this has been from the employer or student perspective. Fds were created to meet a number of government agendas and were seen as unique, bringing together: life-long learning, widening participation, flexibility of delivery, employer engagement and work-experience.
This research uses a mixed methods methodology. This includes: collating curriculum documents to explore commonalities and differences, a questionnaire sent out to academics across the UK, and semi-structured interviews of course teams from three Further Education colleges and three universities.
Unexpected findings were that academics felt their own development had been enhanced through working with Fds. This had been transformative in relation to their career pathway or challenged them to develop their approaches to teaching. The other significant finding was that academics perceived Fd students as different or ‘other’ from those students on ‘traditional courses’. The students were described as hard working, motivated but also challenging and lacking self-confidence. A recurring theme was that Fds had provided a ‘second chance’. This led to discussions as to whether Fds are a bridge between a series of liminal states on a journey from affirmative to transformational learning. Other findings highlighted the complexity of developing and delivering Fds in collaboration with employers, other higher education providers and within institutions.
The research found that Fds are complex and have no specific identity but consist of a family of awards. They meet widening participation and employers’ needs, but are not fully understood. The research has significance not only for Fds, but also future courses that aim to widen participation, include employer engagement and enable students to develop skills for specific work settings. The academics’ perspective adds to the existing views of employers and students of Fds about whether they have been successful.
7
Northrop, Mary. "Foundation degree programmes in health : perspectives of leaders and contributors across the UK." Thesis, Anglia Ruskin University, 2016. http://arro.anglia.ac.uk/700995/.
Повний текст джерелаАнотація:
Academics are at the forefront of the inception, design and delivery of Fds and therefore are responsible for ensuring the aims are met, but their views on the award and the delivery of curricula have not been sought. Foundation degrees (Fds) were introduced in 2000 and although courses have been evaluated, this has been from the employer or student perspective. Fds were created to meet a number of government agendas and were seen as unique, bringing together: life-long learning, widening participation, flexibility of delivery, employer engagement and work-experience. This research uses a mixed methods methodology. This includes: collating curriculum documents to explore commonalities and differences, a questionnaire sent out to academics across the UK, and semi-structured interviews of course teams from three Further Education colleges and three universities. Unexpected findings were that academics felt their own development had been enhanced through working with Fds. This had been transformative in relation to their career pathway or challenged them to develop their approaches to teaching. The other significant finding was that academics perceived Fd students as different or ‘other’ from those students on ‘traditional courses’. The students were described as hard working, motivated but also challenging and lacking self-confidence. A recurring theme was that Fds had provided a ‘second chance’. This led to discussions as to whether Fds are a bridge between a series of liminal states on a journey from affirmative to transformational learning. Other findings highlighted the complexity of developing and delivering Fds in collaboration with employers, other higher education providers and within institutions. The research found that Fds are complex and have no specific identity but consist of a family of awards. They meet widening participation and employers’ needs, but are not fully understood. The research has significance not only for Fds, but also future courses that aim to widen participation, include employer engagement and enable students to develop skills for specific work settings. The academics’ perspective adds to the existing views of employers and students of Fds about whether they have been successful.
8
Abd, Wahab Alawiyah. "Designing an information infrastructure to support research degree programmes : identifying information and technology needs." Thesis, University of Newcastle upon Tyne, 2016. http://hdl.handle.net/10443/3149.
Повний текст джерелаАнотація:
Extensive previous research has shown that web-based technologies have the potential to improve and enhance the quality of learning both on campus and at a distance. However, most of these studies have focused on the application of web-based technologies to support either undergraduates or taught postgraduate programmes, particularly, the use of Virtual Learning Environment (VLE) system to complement module-based courses. Evidence from previous research on the use of VLE to support research students in the context of specific modules showed mixed results. Analysis of the VLE literature suggests that the system arranges courses based on academic calendar. Thus, students will not be able to access the system after the semester end. With postgraduate research, the processes of research are often incomplete even when students have graduated and they often seek to further the work through publication in journals. Therefore, using VLE alone would not possibly support the need of research student, particularly the support that they need throughout the stages of the research life cycle. Therefore, the main aim of this study is to investigate how a web portal could be designed to support the research students throughout the research life cycle. A conceptualised web portal design has been constructed through an extensive review of the web-based technologies, learning theories and research degrees literature. The conceptualised web portal design illustrates that the design is underpinned by adult learning theories and the theory of stages in socialisation development, which in turn inform the framework of this research study. This model was then validated and updated through four action research cycles. A web portal system was developed, using the prototyping method to demonstrate the application of the web portal design informed by the adult learning theories and theory of stages in socialisation development. The research findings suggest that action research and prototyping methodology is capable of designing a web portal that is able to support the needs of research students in the context of a life cycle approach. Furthermore, the study reveals that personalisation and customisation features have proved to be useful in providing relevant information to research students at each stage of the research students’ study. It was found that research students value dynamic content such as Really Simple Syndication (RSS) features for providing condensed, updated content relevant to their interests.
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Snell, Lauren. "A comparative study of the clinical competence of community service practitioners: degree and diploma nursing programmes." University of the Western Cape, 2013. http://hdl.handle.net/11394/8248.
Повний текст джерелаАнотація:
Magister Curationis - MCurAccording to Benner (2001 ), an individual moves through five stages: novice, advanced beginner, competent, proficient and expert. Competence is the measure or degree of a person's ability to cope with all aspects of the environment. It is expected that when an individual achieves competence, they possess the necessary knowledge, skills, abilities, attitudes and professionalism required to perform a certain function. The purpose of the study was to compare the perceptions of the Community Service Practitioners (Degree versus Diploma) regarding their clinical competence in providing nursing care and to establish and compare the perceptions of Professional Nurses regarding the clinical competence of the Community Service Practitioners they supervise (Degree versus Diploma) in providing nursing care. The null-hypothesis stated that there is no difference in the clinical competence of Community Service Practitioners who completed a Degree nursing programme as compared to those who completed a Diploma nursing programme leading to registration as a Professional Nurse (R425). The research methodology was quantitative, using a comparative, descriptive, cross-sectional design. The target population of the study included a sample of all Community Service Practitioners who worked in Regional Hospitals in the Western Cape and the Professional Nurses who supervised them. Convenience sampling was used to select the sample for this research and data were collected by means of a five-point Likert-scale questionnaire for the Professional Nurses supervising the Community Service Practitioners and a three-point Likert-scale questionnaire for the Community Service Practitioners. Data was organized and analyzed by using Statistical Package for Social Sciences (SPSS), Version 21. Descriptive statistics were used and findings were illustrated by means of descriptive tables and figures. The Mann-Whitney U test was used to calculate the null-hypothesis, which was retained. The results of the study indicated that there is no difference in the clinical competence, which included knowledge, skills and attitude, of Community Service Practitioners who completed an undergraduate Degree compared to those who completed a Diploma in nursing.
10
Forsman, Jonas. "Complexity Theory and Physics Education Research : The Case of Student Retention in Physics and Related Degree Programmes." Doctoral thesis, Uppsala universitet, Fysikundervisningens didaktik, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-259413.
Повний текст джерелаАнотація:
This thesis explores the use of complexity theory in Physics Education Research as a way to examine the issue of student retention (a university’s ability to retain its students). University physics education is viewed through the concepts of nestedness and networked interactions. The work presented in this thesis covers two main aspects from a complexity theory perspective: (1) institutional action to enhance student retention; and, (2) the role of students’ in-course interaction networks. These aspects are used to reframe student retention from a complexity theory perspective, as well as to explore what implications this new perspective affords. The first aspect is addressed by conceptualizing student retention as an emergent phenomenon caused by both agent and component interaction within a complex system. A methodology is developed to illustrate a networked visualization of such a system using contemporary estimation methods. Identified limitations are discussed. To exemplify the use of simulations of complex systems, the networked system created is used to build a simulation of an “ideal” university system as well as a Virtual world for hypothesis-testing. The second aspect is divided into two sections: Firstly, an analysis of processes relating to how students’ in-course networks are created is undertaken. These networks are divided into two relevant components for student retention – the social and the academic. Analysis of these two components of the networks shows that the formation of the networks is not a result of random processes and is thus framed as a function of the core constructs of student retention research – the social and academic systems. Secondly, a case is made that students’ structural positions in the social and academic networks can be related to their grade achievement in the course.
11
Mabunda, Pinkie L. "The policy and practice of work based learning degree programmes in England : implications and challenges for South Africa." Thesis, University of Nottingham, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.412117.
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Cui, Fengqiao (Vanessa). "The 'wicked' problem of employability development in HE degree programmes : experiences, understandings and peceptions of lecturers and students." Thesis, Liverpool John Moores University, 2014. http://researchonline.ljmu.ac.uk/4423/.
Повний текст джерелаАнотація:
For more than a decade, universities around the world have been placed with great responsibility to develop their students’ employability for political, economic and social reasons. Though many policies, research and practices have tried to address the issues and challenges employability development in HE faces, to date it remains a ‘wicked’ problem for higher education. Through a close up research framework, this study explored and examined the experiences, understandings and perceptions of lecturers, and students from two English Post 92 degree programmes, in an educational discipline, regarding employability and employability development. In order to illuminate some of the critical issues, in an attempt to understand ‘why employability development is so problematic to higher education’, this study took a reflexive phenomenological approach to look at how lecturers and students make sense of employability and employability development, through their own experiences. As well as looking at the two groups separately, it also compared their perceptions and understandings to highlight any dissonances they have, which are crucial to the complex and ‘wicked’ problem of employability development in their programmes. As lecturers and students hold diverse perspectives on employability in HE that is often in conflict, it was expected that there would be no “one size fits all” solution. In addition, this study found that employability has certainly added complexities to higher education. Certainly, it has led the students and lecturers to have complex issues within their roles and identities, in relation to employability development in their programmes and in HE in general. As such, this study reflexively examined those issues, and concludes that although employability development in HE will remain complex and ‘wicked’, through reflexive research and practices, vital issues relating to lecturers’ and students’ roles and responsibilities can be illuminated and solved.
13
Bamford, Jan Katherine. "Dealing with difference : developing an understanding of international postgraduate joint degree programmes in business in London and France." Thesis, University College London (University of London), 2014. http://discovery.ucl.ac.uk/10018343/.
Повний текст джерелаАнотація:
This thesis examines the student experience of international higher education through a case study of joint Masters degrees in business taught in two countries. The thesis explored how the ‘joint degree’ experience impacts on the way students undertake their learning and intercultural ‘negotiations’. The focus on cultural interaction, international mobility, relationality between students and the way students experience the learning environment as dimensions of their experience furthers an understanding of international higher education. The exploration of the individual students’ ‘lived reality’ demonstrates the complexity and limitations of such programmes of study as well as the importance of culture, being the fabric of meaning for individuals (Geertz, 1973) in relation to and as part of the educational experience of a joint degree. This overarching dimension of culture is given prominence in this work, not only in terms of the culture of the institutions that the students study in, but also in terms of the different national education systems, of which those institutions are part and more generally in terms of the different cultures that students have to negotiate as part of their experience. The research approach was through a case study method, relying on the use of mixed methods for data collection to provide a ‘thick’ description of the experiences of joint degrees and a triangulation of the findings for each data set. The thematic analysis of the data focussed on individuals’ construction of their reality in order to gain an understanding of that reality. The concept of ‘relationality’ is introduced to refer to the learning that occurs as a result of the recognition of the ‘other’. It denotes a learning environment where students learn with and from other students and as a result of their country mobility. As a consequence they develop their intercultural awareness. This relationality is seen as a cornerstone of the experience of joint degrees and is significant to the achievement of inter-cultural learning.
14
Haines, Kevin. "The situated language learning of international students taking degree programmes taught through English in the Netherlands : narrative interpretations." Thesis, University of Bristol, 2008. http://hdl.handle.net/1983/ca967bba-45d9-4b88-8b66-a0ecafe6c4e9.
Повний текст джерелаАнотація:
This dissertation reports my collation of the language learning narratives of international students taking degree programmes taught through English in the Netherlands. Narrative representations of the experiences of seven internationally-oriented students reveal learner perspectives of language acquisition beyond the formal classroom. Meanwhile,I have used personal narratives to represent my own interaction with participants and data, resulting in a portrayal of my growth from teacher into qualitative researcher. I record the learning experiences of the participants through Language Learning Histories (Murphey, Chen & Chen: 2004), semi-structured interviews and journal entries. This has enabled me to show how local participative practices have impacted upon language acquisition at different stages of the participants' educational lives. Narrative interpretations of the data provide a record of the identity work required for participants to achieve participation and negotiate agency in their core learning community (ICF) and other communities. The narratives of these learners are grounded in notions of situated learning. I use Communities of Practice (Wenger 1998) as the main conceptual framework during this investigation, discussing language acquisition in terms of participation in communities through legitimate peripheral participation (LPP) and mutual engagement. However, I also draw on perspectives from within the field of Second Language Acquisition (SLA), notably a heuristic understanding of Activity Theory (Lantolf & Favlenko 2001; Ivanic 2006). This research provides an example of how narrative interpretations of language learning experiences can provide an understanding of the impact of local educational practices on learner participation in and across communities. I conclude that there is a need for greater transparency and awareness of the relationship between language learning, identity work and participation.
15
Stoneley, Helen Elizabeth. "Fitness for purpose in vocational higher education : relationship between entry requirements and student attainment in occupational therapy degree programmes." Thesis, University of Sheffield, 2002. http://etheses.whiterose.ac.uk/14726/.
Повний текст джерелаАнотація:
This thesis explores the relationship between the level of entry requirements and subsequent student attainment on Occupational Therapy degree programmes. It questions the justification for the continued rise in the level of entry qualifications since the early 1990s. It also considers whether students' personal qualities should be seen as equally important when considering entry to a vocational programme. The thesis begins With a review of the evoiution of Occupational Therapy as a profession and considers the development of training courses from diploma through to degree validation. A range of literature is discussed in relation to the role of qualifications in education and training including degrees in the training of professionals and issues of professional competence. An empirical investigation, using quantitative and qualitative methods was conducted of the relationship between entry requirements and student attainment at an English university where an Occupational Therapy degree programme has been placed since 1991. A questionnaire survey provided details of the students' entry qualifications which were then considered alongside evidence of students' progress and attainment during the programme and their final degree classification. Interviews were conducted with lecturers at the university and employers of the new graduates. The findings of this thesis did not find any academic rationale to support the rise in entry qualifications. Rather, the results indicate that had the entry standards been strictly adhered to, a high percentage of students would not have been eligible to train. Furthermore, the thesis establishes that more importance should be given to the role of interviewing prospective students.
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Kajee, Farhana Amod. "Knowledge and knowers in Educational Leadership and Management (ELM) Master’s Programmes in South Africa." Thesis, Rhodes University, 2018. http://hdl.handle.net/10962/60698.
Повний текст джерелаАнотація:
This dissertation examines the knowledge and knower practices in the Master’s in Educational Leadership and Management (ELM) coursework programmes at South African public universities. This study was prompted by my growing awareness of problems and tensions in the field of ELM generally, and at the level of programme design of the M Ed degree in particular. Many of these had been identified by a national audit of coursework M Eds in ELM (CHE, 2010), and this study sought to find a way of theorising these with a view to improving both course design and teaching. To this end I employed Maton’s Legitimation Code Theory (LCT) which enables critical engagement with knowledge and knowers in programmes, how they are positioned, and how this positioning may be problematic. Hence my first research question sought to discover and critique what counted as knowledge in these programmes and why, while the second asked how knowers were positioned, and why this had come to be the case. LCT has its roots in the work of Bernstein and Maton, whose preoccupation with curriculum was/is driven by a sense of social justice: if we can understand how and why the curriculum is organised and presented in a particular way, it becomes possible to re-imagine teaching and learning, making it accessible to a broader, more inclusive body of learners. The study also drew on critical realism as an underlabourer. This philosophy provided a nuanced understanding of ontology, encouraging and enabling me, as researcher, to unearth causal mechanisms driving the status quo. Only seven South African universities currently offer the coursework option of a Master’s degree in ELM, compared to thirteen when the audit was conducted in 2010. Six of the universities agreed to take part in the study. Data was gathered through content analysis of the six course outlines and interviews with individual co-ordinators or academics centrally involved in the programmes. Through the development of a translation device I was able to establishing that a knower code was dominant in the programmes. Using this point as my departure, I interrogated the knowledge practices and found that different types of knowledge were being privileged across the programmes, with some having a practical/professional leaning and others a more academic/theoretical orientation. The resultant tension does, I argue, restrict knowledge building and helps to account for the fact that the field is generally considered to be under-theorised. The fact all of these programme are registered with the same national qualifications authority, ostensibly following the same national guidelines for Master’s degrees is worrying. The study attempts to find underlying, historically significant reasons for this unevenness. An analysis of the programmes revealed a leaning towards supportive pedagogical approaches. While all programmes promote a cultivated gaze their purposes are not always the same. While a hegemonic practices potential for opening counts as knowledge, cultivated gaze can enable transformation, it can also encourage that can impede real change and empowerment. The study has the up much needed debate on what is meant by a Master’s in ELM, what and what kinds of knower are envisaged.
17
Hendry, Jane. "The analysis and prediction of student progression through degree programmes : a cohort analysis of undergraduate students at the university of Cape Town." Master's thesis, University of Cape Town, 1998. http://hdl.handle.net/11427/17526.
Повний текст джерелаАнотація:
Bibliography: pages 85-87.A simplified cohort survival analysis was used to investigate the academic progression of first-time entering undergraduate students within four large bachelors' degree programmes at the University of Cape Town. The rates of graduation, academic exclusion and voluntary drop-out were quantified in relation to the matriculation authorities and prior matriculation performance of the students within each of the four cohorts. The results of the analyses served to identify specific areas of concern with regard to the internal efficiencies in student progression through each of the four degree programmes, and it is suggested that the availability of information of this type will be essential in the attainment of the institutional transformation goals set out in the 1997 White Paper on the transformation of higher education in South Africa. Significant relationships between the matriculation criteria and the final academic outcomes of students within each cohort were detected using log-near modelling. By means of multiple discriminant analysis, significant predictor variables of the final undergraduate academic outcomes within each cohort were identified. However, the relatively weak discriminatory powers of the multiple discriminant models and the poor predictive accuracy of the associated classification functions suggest the variables included in these analyses did not adequately explain the variability in the final undergraduate academic outcomes of students within the selected cohorts. The extent of the voluntary drop-out phenomenon within each of the cohorts was quantified in relation to matriculation criteria, and further analysis of the cohorts indicated that factors other than academic difficulty appeared to have prompted the greater proportion of the voluntary withdrawals. Those students who had dropped out voluntarily were therefore not included in either the log-linear models or the multiple discriminant analyses.
18
Ebrahim, Ashraf. "Open and distance learning in higher education in Egypt : an evaluation of the degree programmes of the Centre of Open Learning in Cairo University (COLCU)." Thesis, University of Bath, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.392067.
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Fehlner, Wendy Dawn [Verfasser], Gregor [Akademischer Betreuer] Falk, Wolfgang [Akademischer Betreuer] Hochbruck, Valentin [Akademischer Betreuer] Weislaemle, Gregor [Gutachter] Falk, Wolfgang [Gutachter] Hochbruck, and Valentin [Gutachter] Weislaemle. "Educating for Sustainable Tourism: an Analysis of Degree Programmes in Sub Saharan Africa and Implications for Reform / Wendy Dawn Fehlner ; Gutachter: Gregor Falk, Wolfgang Hochbruck, Valentin Weislaemle ; Gregor Falk, Wolfgang Hochbruck, Valentin Weislaemle." Freiburg : Pädagogische Hochschule Freiburg, 2020. http://d-nb.info/1214439403/34.
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Dobruská, Iva. "Současné trendy ve vzdělávání manažerů." Master's thesis, Vysoká škola ekonomická v Praze, 2008. http://www.nusl.cz/ntk/nusl-72273.
Повний текст джерелаАнотація:
This thesis charts the developments that have occurred in the field of managerial education specifically from the perspective of the current trends in educational programmes both in the Czech Republic as well as abroad. The theoretical section of the thesis consists of a pilot study aimed at the demand for educational and developmental programmes amongst a selected research sample of managers and also at an analysis of the supply offered by a sample of educational organisations located in the City of Prague. Based on the information that was gathered, certain conclusions were drawn and recommendations made for modifying the study programmes offered by the Faculty of Management of the University of Economics.
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Muehlhausen, Beth L. "Dual Degree Programs in Social Work and Divinity: Graduates' Experiences of Journey Companions." Connect to resource online, 2010. http://hdl.handle.net/1805/2208.
Повний текст джерелаАнотація:
Thesis (Ph.D.)--Indiana University, 2010.Title from screen (viewed on July 21, 2010). School of Social Work, Indiana University-Purdue University Indianapolis (IUPUI). Advisor(s): Margaret E. Adamek, Katharine V. Byers, Frank Caucci, Rebecca S. Sloan. Includes vitae. Includes bibliographical references (leaves 118-128).
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Zhang, Nan. "A critical evaluation of policies and programmes that mitigate the effects of free trade on unemployment a dissertation submitted to Auckland University of Technology in partial fulfillment of the requirements for the degree of Master of Business (MBus), 2008." Abstract. Full dissertation, 2008.
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23
Morgan, Lesleyann. "Captivated by learning : the study of an innovative organizational strategy for professional development." Thesis, Lancaster University, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.288871.
Повний текст джерела
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Salo, A. (Aleksi). "Geology of the Jaakonlampi area in the Siilinjärvi carbonatite complex." Bachelor's thesis, University of Oulu, 2016. http://urn.fi/URN:NBN:fi:oulu-201604091452.
Повний текст джерелаАнотація:
The objective of this work was to describe the lithology and structures of the Jaakonlampi area of the Siilinjärvi alkali complex, eastern Finland. The research area is located directly north of the currently mined Särkijärvi open pit of the Siilinjärvi apatite mine. A drilling project to increase the knowledge on the phosphorus-bearing mineralization in the Jaakonlampi area was commenced in 2014. The defined lithological units and structural model were based on field observations and Yara Siilinjärvi Mine’s geological database and employed in resource estimation on the Jaakonlampi area.
The Jaakonlampi area consists of carbonatite, silicocarbonatite, carbonate-glimmerite and glimmerite, with fenite xenolith-bearing margins in contact with metasomatically produced fenite halo. A regional NE-SW-trending shear zone affects the northern part of the Jaakonlampi area. The alkali complex is cut by Svecofennian mafic and intermediate dikes, with varying age and composition. A previously unknown felsic pegmatitic dike was identified from the northwest part of the Jaakonlampi area. Four deformation phases were identified in the study area. The use of structural geology gives the ore evaluation process a better control over the calculation parameters in different areas, as all the lithological domains are affected by regional and local faulting and shearing.
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Taipale, N. (Niilo). "Kannettavan XRF-analysaattorin käyttö biogeokemiallisessa malminetsinnässä." Bachelor's thesis, University of Oulu, 2016. http://urn.fi/URN:NBN:fi:oulu-201605251928.
Повний текст джерелаАнотація:
Biogeokemiallisen kartoituksen aineiston keräämisen menetelmät ovat vakiintuneet näytteiden keräämiseksi kasvien oksista, lehdistä, kaarnasta ja karikkeesta. Teknologian kehityksen myötä näytteet voidaan analysoida suoraan kentällä kannettavan XRF-analysaattorin avulla. XRFanalysaattori ei kuitenkaan kerro absoluuttisia pitoisuuksia, vaan tulokset kertovat, varsinkin biogeokemiallisessa näytteenotossa, alkuaineiden suhteista ja malminetsinnän kannalta mahdollisista anomalioista. Myös kannettavan XRF-analysaattorin kanssa aineiston keräämisessä on noudatettava tiettyjä toimintatapoja tuloksien yhdenmukaistamiseksi. Pyhäsalmella kesällä 2014 tehtyjen mittausten perusteella kehitettiin näitä toimintatapoja.
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Haanela, M. (Maria). "Kullan esiintyminen kuparikiisun yhteydessä Pahtavaaran kaivoksen Karoliina- ja Länsimalmeissa." Bachelor's thesis, University of Oulu, 2016. http://urn.fi/URN:NBN:fi:oulu-201606072400.
Повний текст джерелаАнотація:
Tässä työssä tutkitaan kullan ja kuparikiisun esiintymistä Pahtavaaran kaivoksen Karoliina- ja Länsi-malmeissa. Pahtavaaran kaivoksen malmit sisältävät yleisesti vähän kiisuja, mutta Karoliina- ja Länsi-malmit ovat tässä suhteessa poikkeuksia, sillä niissä esiintyy keskimääräistä enemmän rikkikiisua. Analysoitaessa on saatu samoista näytteistä jopa prosenttien kuparipitoisuuksia ja korkeita kultapitoisuuksia, ja halusin selvittää, esiintyykö näissä malmeissa kulta ja kuparikiisu yhdessä vai ei.
Tutkimiseen on käytetty mikroskooppia, joka on yhdistetty polarisaatio- ja malmimikroskooppi. Sillä tutkittiin valittuja kiillotettuja ohuthieitä ja kiillotettua kivinappeja. Näytteistä vain yhdestä löytyi näkyvää kultaa. Se on dolomiittijuonikivessä, jossa on noin 20 % kuparikiisua kuparikiisurakeen ja dolomiittimineraalin välissä.
Tutkimusten perusteella tulin siihen tulokseen, että vaikka kullan esiintyminen korreloi paikoin positiivisesti kuparikiisun esiintymisen kanssa, ne eivät suoraan liity toisiinsa. Todennäköisemmin kuparikiisun synty liittyy samaan prosessiin, joka on synnyttänyt kultaa sisältävät dolomiittijuonet.
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Joenpolvi, J. (Juho). "Itämeren muinaisrannat Suomessa." Bachelor's thesis, University of Oulu, 2018. http://urn.fi/URN:NBN:fi:oulu-201805091677.
Повний текст джерелаАнотація:
Muinaisrannoiksi nimitetään erilaisia rantavoimien eli aallokon ja jäiden liikkeiden aikaansaamia kerrostumia ja kulutusmuotoja, jotka ovat syntyneet meren tai järven pinnan tason ollessa maanpintaan nähden huomattavasti nykyistä korkeammalla. Suomessa muinaisrantojen synty liittyy erottamattomasti deglasiaation aikana alkaneeseen maankohoamiseen ja Itämeren kehitysvaiheisiin. Tämän tutkielman tavoitteena on esitellä Itämeren muinaisrantojen kerrostumis- ja kulutusmuodot sekä niiden syntyhistoria ja levinneisyys Suomen alueella. Työssä esitellään myös maamme muinaisrantojen ajoittamiseen soveltuvat menetelmät ja rannansiirtymismallit. Muinaisrantojen piirteiden kehittymiseen vaikuttivat paljolti rantavyöhykkeen sijainti ulappaan nähden, sen suojaisuus sekä pohjan jyrkkyys. Ympäristöönsä nähden korkeille mäille, jotka kohosivat saariksi keskelle merta ilman muiden pinnanmuotojen suojaa, syntyi merkittäviä rantamuodostumia. Myös ranta-alueen maaperän merkitys oli suuri muinaisrantojen syntyprosessissa. Selväpiirteisimmät rantavyöhykkeen kerrostumatyypit syntyivät lajittuneiden glasifluviaalisten muodostumien liepeille, mutta huuhtoutumalla syntyneitä muotoja jäi hyvin esiin etenkin moreenipeitteisiin mäkiin kivivöiden, huuhtoutumiskivikoiden ja moreenikalottien muodossa. Merkittäviä ja hyvin kehittyneitä muinaisrantoja syntyi varsinkin niissä vesivaiheissa, joissa vedenpinta pysyi suurin piirtein samoilla korkeuksilla riittävän pitkään antaen rantavoimille aikaa kuluttaa ja uudelleenkerrostaa maa-ainesta. Transgressiovaiheissa pinnan taso pysyi monesti regressiovaiheita pitempään paikoillaan, ja tästä johtuen niiden aikana muodostuneet muinaisrannat ovatkin usein paremmin kehittyneitä. Eri alueiden parhaiten erottuvat aallokon kulutusmerkit löytyvät tyypillisesti Itämeren ylimpien rantojen tasoilta. Eriasteisia muinaisrantoja syntyi kuitenkin kaikissa Itämeren vaiheissa, ja niitä on löydettävissä Itä- ja Pohjois-Suomen supra-akvaattisia alueita lukuunottamatta ympäri maata. Ensimmäiset muinaisrannat syntyivät Baltian jääjärvivaiheessa Ensimmäisen ja Toisen Salpausselän rinteisiin sekä niiden välimaastoon. Seuraavan, Yoldiamereksi kutsutun vaiheen rantamuodostumia löytyy paljonkin Etelä- ja Keski-Suomesta, mutta ne ovat yleensä heikosti kehittyneitä nopean maankohoamisen ansiosta. Erityisen selväpiirteisiä muinaisrantoja kerrostui tämän jälkeen Ancylustransgression aikana ympäri Länsi-Suomea, Pohjois-Pohjanmaata ja Lounais-Lappia. Samoin Litorinatransgression aikoihin kerrostui merkittäviä muodostumia laajoille alueille Etelä- ja Länsi-Suomeen, jolloin maankohoaminen oli jo hidastunut merkittävästi. Muinaisrantoja on syntynyt myös myöhemmin, nykyiseksi Itämereksi luokitellun vaiheen sisällä. Suomen oloissa eniten käytettyjä muinaisrantojen iänmääritysmenetelmiä ovat olleet merestä irti kuroutuneiden järvi- ja suoaltaiden pohjasedimenteistä tehdyt radiohiiliajoitukset, palynologiset havainnot ja piilevälajiston tutkimukset. Lustosavikronologia on ollut toinen erityisen hyödyllinen työkalu etenkin Baltian jääjärvivaiheen ajoituksissa. Myös paleomagnetismia sekä arkeologisia menetelmiä on hyödynnetty tutkimuksissa. Näiden menetelmien avulla tehtyjen ajoitusten pohjalta on voitu piirtää rannansiirtymiskäyriä, etäisyysdiagrammeja ja gradienttikäyriä, joilla vuorostaan pystytään matemaattisesti arvioimaan eri rantapintojen ikiä.
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Rantapirkola, T. (Tommi). "Turpeen energiakäytön kasvihuonevaikutus elinkaarinäkökulmasta." Bachelor's thesis, University of Oulu, 2017. http://urn.fi/URN:NBN:fi:oulu-201711223132.
Повний текст джерелаАнотація:
Suomen maapinta-alasta noin yksi kolmasosa on suomaata. Geologisten soiden yhteispinta-ala on 5,1 miljoonaa hehtaaria ja turpeen tuotantoon soveltuvaa teknisesti käyttökelpoista suopinta-alaa on 1,2 miljoonaa hehtaaria. Teknisesti käyttökelpoisten soiden turvevarojen energiasisältö on 1100 Mtoe eli 1100 miljoonaa öljytonnia vastaava energiamäärä, mikä on noin 36 kertainen Suomen vuotuiseen primäärienergian kulutukseen verrattuna.
Suuresta energiavarannosta johtuen turpeella on merkittävä osuus Suomen energiahuollossa. Suomessa tuotetusta sähköstä 4–5 % tuotetaan turve-energialla ja lämmöstä 15 %.
Turve luokitellaan hitaasti uudistuvaksi fossiiliseksi polttoaineeksi ja sen energiakäyttö tuottaa kasvihuonekaasupäästöjä ja siten vaikuttaa ilmaston lämpenemiseen samoin kuin muutkin fossiiliset polttoaineet. Turve-energian tuotantoketju on ajallisesti pitkä. Sen takia ilmastovaikutusten tarkastelu on suoritettava kaikki tuotantoketjun vaiheet kattavasti.
Tässä työssä on kirjallisuuslähteiden avulla kartoitettu eri turvetuotantoketjujen ilmastovaikutusta elinkaarinäkökulmasta säteilypakotetta apuna käyttäen. Turve-energian tuotannon ilmastovaikutusta verrataan kivihiilellä tuotetun energian ilmastovaikutukseen.
Tuloksena todetaan, että suopeltolähtöinen turvetuotantoketju aiheuttaa pienimmän ilmastorasituksen elinkaariajanjaksolla. Metsäojitettu suo lähtökohtana tuottaa lähes samansuuruisen ilmastokuormituksen kuin kivihiilellä tapahtuva energian tuotanto. Kuitenkin voidaan sanoa, että kaikki turvetuotantoketjut ovat ilmaston muuttumisen kannalta edullisempia kuin kivihiilipohjainen energian tuotanto.
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Hettula, J. (Jesse). "Pyhäsalmi volcanogenic massive sulfide deposit, central Finland." Bachelor's thesis, University of Oulu, 2017. http://urn.fi/URN:NBN:fi:oulu-201710253010.
Повний текст джерелаАнотація:
Pyhäsalmi mine is located in central Finland, at the eastern side of the Pyhäjärvi lake. The Pyhäsalmi deposit is polymetallic Zn-Cu VMS ore body with total reserve, mined and yet to be mined, of 58.3 Mt @ Cu 0.9 %, Zn 2.4 %, S 37.8 %, Au 0.4 g/t and Ag 14 g/t. At the end of 2013, 51 Mt of ore has been mined. The mine will be in operation until August of 2019.
The Pyhäsalmi deposit is hosted in a felsic-dominated bimodal Proterozoic succession. Local hydrothermal alteration is composed of sericite-quartz alteration, and intensifies when it is in close proximity with the upper ore body. The deep ore body is thrusted into unaltered metamorphosed hangingwall volcanic rock, thus separated from the alteration zone.
The Pyhäsalmi district and deposit has been subjected to four different tectonic phases (D1–D4) and intrusions accompanied by them. These tectonic processes have thrusted the deposit in upright position from the original position.
Basic theory of VMS formation processes can be used for modeling Pyhäsalmi deposit formation process, which in turn can benefit massive sulfide exploration.
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Mikhaylin, G. (Gleb). "Mississippi Valley Type ore deposits, the Laisvall Pb-Zn deposit and origin of Pb-Zn-bearing sandstone glacial erratic from the Raahe area." Bachelor's thesis, University of Oulu, 2018. http://urn.fi/URN:NBN:fi:oulu-201803221375.
Повний текст джерелаАнотація:
The Geological Survey of Finland collected zinc-, lead- and copper-bearing glacial sandstone boulders in 1970’s and 1980’s south of Raahe, Finland. The origin of these sandstones remains inconclusive. The petrographic analysis shows sphalerite, galena, pyrite and chalcopyrite as the main ore-bearing minerals in the matrix of the sedimentary rocks, associated with quartz, feldspar and calcite. Signs of a carbonate-cemented sediment and metal-rich fluid interaction suggest that mineralization was formed as part of a Mississippi Valley type deposit system. The main hypotheses suggest that the boulders were derived from the Laisvall MVT deposit of Sweden or from an unknown mineralization in the Bothnia Bay. The objective of this study was to make a literature review of the Laisvall deposit and analyze the compositional range of sphalerite in a sample from Raahe and compare it to the chemical characteristics of the Laisvall MVT deposit in Norwegian Caledonides, to determine the origin of Raahe glacial erratic sample. The second objective of the study was to assess the dependency of the color on the iron content of the sphalerite. The study is completed by optical microscopy and electron microprobe analysis (EPMA).
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Puumalainen, T. (Topias). "Lumivyöryjen aiheuttama eroosio ja kerrostumismuodot." Bachelor's thesis, University of Oulu, 2018. http://urn.fi/URN:NBN:fi:oulu-201805312075.
Повний текст джерелаАнотація:
Lumivyöryt ovat jyrkillä rinteillä esiintyviä, pääasiassa lunta kuljettavia massaliikuntoja, jotka voivat kuitenkin kuljettaa lumimassan seassa myös debristä kuten kiviä ja orgaanista ainesta. Lumivyöryt voidaan luokitella irto- ja laattalumivyöryihin. Irtolumivyöryt ovat pistemäisestä lähteestä irtoavia ja alaspäin kasvavia lumivyöryjä. Laattalumivyöryissä lumipeitteestä irtoaa yhtenäinen laatta, kun siihen kohdistuva leikkausjännitys ylittää lumikerroksen leikkauslujuuden. Lumivyöryt kykenevät sekä erodoimaan maanpintaa että kerrostamaan kuljettamaansa ainesta erilaisiksi maaperämuodoiksi.
Lumivyöryt aiheuttavat maanpinnan eroosiota edetessään lumettoman maanpinnan päällä tai lumivyörymassojen käsittäessä koko lumipeitteen. Tärkeimmät eroosiomekanismit ovat rakeiden törmäykset ja abraasio. Tiheästä aineksesta koostuvilla lumivyöryillä, kuten vesipitoisilla lumivyöryillä, on korkea eroosiopotentiaali. Lumivyöryjen aiheuttaman eroosion nopeus vaihtelee keskimäärin välillä 0–0,5 millimetriä vuodessa.
Eroosiomuodoista, joita lumivyöryt synnyttävät, suurimpia ovat lumivyörykraatterit (engl. impact craters, impact pits), jotka ovat halkaisijaltaan 20–100 metriä, ja syvyydeltään 1–5 metriä olevia kraattereita, joiden distaalipuolella on usein puolikaaren muotoinen valli (engl. impact mound). Lineaarisia lumivyöryjen synnyttämiä eroosiomuotoja ovat lumivyörykourut (engl. avalanche chutes, avalanche furrows) ja laahausjäljet. Lumivyörykourut ovat muutamia metrejä leveitä ja 1–3 metriä syviä U-muotoisia uria. Näissä kouruissa ja lumivyöryuralla yleisesti voi esiintyä erisuuruisia lumivyöryn kuljettamien klastien maanpintaan synnyttämiä laahausjälkiä.
Lumivyöryjen kuljettaman debriksen määrä vaihtelee hyvin suuresti. Lumivyöryjen kerrostamat sedimentit ovat lajittumattomia ja niiden kivet eivät ole suuntautuneita. Sedimenttien kerrostuminen siten, että perusmassa eli lumi sulaa muun aineksen ympäriltä aiheuttaa muun muassa klastien kerrostumista toistensa varaan, epävakaisiinkin asentoihin, ja pienten rakeiden sekä orgaanisen aineksen kerrostumista suurempien kivien ja lohkareiden päälle.
Lumivyöryt kerrostavat pysähtymisvyöhykkeelleen pitkittäisiä, alaspäin leveneviä lumivyörykeiloja (engl. avalanche boulder tongues). Yleisesti satoja metrejä pitkät ja kymmenistä satoihin metriä leveät keilat koostuvat sorasta ja sitä karkeammista rakeista. Lumivyöryuralla esiintyy suurten lohkareiden distaalipuolella katvevalleja (engl. debris shadow, debris tail), jotka ovat pituudeltaan 10–15 metriä ja korkeudeltaan 0–1 metriä, ja jotka voivat olla alkuperältään sekä eroosion että kerrostumisen tulosta. Pienempiä pitkittäisiä kerrostumismuotoja ovat ruoteet (engl. ribs) ja reunavallit (engl. levées).
Poikittaisia lumivyöryjen kerrostamia maaperämuotoja ovat törmäysharjanteet (engl. impact ramparts) ja pronival-muodostumat (engl. pronival ramparts, protalus ramparts). Törmäysharjanteet muodostuvat, kun lumivyöry törmää jokiuomaan singoten ja kerrostaen ainesta uoman distaalipuolelle poikittaiseksi harjanteeksi. Pronival-muodostumat ovat yleensä pysähtymisvyöhykkeellä esiintyviä matalia ja poikittaisia muodostamia, joita voivat synnyttää lumivyöryt, mutta myös muun muassa kivivyöryt ja solifluktio.
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Kukkonen, T. (Tommi). "Glasiomariiniset kerrostumissysteemit." Bachelor's thesis, University of Oulu, 2018. http://urn.fi/URN:NBN:fi:oulu-201805312084.
Повний текст джерелаАнотація:
Glasiomariiniset kerrostumissysteemit tarkoittavat ympäristöjä, joissa jään reuna päättyy mereen, ja joissa muodostuu geneettisesti yhtenäisiä litofasieskokonaisuuksia. Ympäristössä tapahtuu glasiaalivaikutteisia prosesseja, joiden tuloksena syntyy kerrostumia. Kerrostumissysteemit voidaan jakaa jääproksimaaliasemaan, joka sijaitsee lähellä jäätikön reunaa, ja jäädistaaliasemaan, joka sijaitsee kauempana jäätiköstä. Kerrostumissysteemien vaikutus ulottuu laajalti mannerreunuksen ympäristöön ja jopa meren abyssaalisille tasangoille asti. Kerrostumasukkessioiden muodostumiseen ja sedimenttisaantoon vaikuttavat merkittävästi alueelliset ilmasto-olosuhteet.
Glasiaalivaikutteisissa altaissa tapahtuvien merenpinnanvaihteluiden ja jäätikön aseman muutosten vuoksi merelliset allasrakenteet kokevat muutoksia. Muutokset voivat olla eustaattisia eli jäätikön kokoon liittyviä muutoksia, tai glasioisostaattisia eli jään painaman maan kuoren palautumiseen liittyviä muutoksia. Muutokset vaikuttavat myös altaan energiatasoihin, jotka puolestaan vaikuttavat sedimentaatioprosessien tehokkuuteen. Jäätiköstä irtoavilla jäämassoilla on merkittävä ympäristöä ja merenpohjaa muovaava vaikutus etenkin korkeilla leveysasteilla.
Glasiomariinisten prosessien ja kerrostumien sekä glasiaalisten sedimenttisukkessioiden tulkitseminen auttaa ymmärtämään aiempaa jäätiköitymishistoriaa ja menneitä ilmasto- ja paleoympäristöolosuhteita. Kerrostumisprosessien tulkinta on hankalaa, mutta glasiaalisedimentologinen tieto voi auttaa ratkaisemaan tulevaisuuden ympäristöongelmia laajenevilla urbaaneilla alueilla.
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Kylli, V. (Ville). "Outokummun alueen geologia." Bachelor's thesis, University of Oulu, 2018. http://urn.fi/URN:NBN:fi:oulu-201804171486.
Повний текст джерелаАнотація:
Outokummun kuparimalmi löydettiin Otto Trüstedtin toimesta siirtolohkaretutkimuksissa 1900-luvun alussa. Tutkimukset aloitettiin sen jälkeen, kun oli löydetty noin viiden kuutiometrin kokoinen kuparimalmilohkare jokiruoppausten yhteydessä. Malmi paikannettiin Kuopion ja Joensuun välille noin 50 km:n päähän lohkareen löytöpaikasta. Muodostuma asettuu arkeeisen ja proterotsooisen kallioperän väliselle sutuurivyöhykkeelle.
Outokummun alueen stratigrafia pohjautuu osin alueella tehtyistä kairauksista ja heijastusseismisistä kokeista saatuun tietoon. Syvän kairareiän poraaminen eli Outokumpu Deep Drilling Project sisällytettiin osaksi Venäjän ja Suomen valtioiden välisten kauppavelkojen sovittelua. Tästä seurauksena GTK pystyi palkkaamaan venäläiset NEDRA G.N.N.P. ja Machinoexport S.E. -yhtiöt vastaamaan kairauksista. Kairaustyö toteutettiin tarkoituksena selvittää Outokummun alueella aiemmin tehtyjen, seismisistä heijastuksista saatujen tulosten geologista luonnetta. Tärkeimmät heijastavat kohteet sijaitsivat 2–2,5 km:n syvyydellä. Kairareikä ulottuu kokonaisuudessaan 2516 metrin syvyydelle, josta ylimmät kaksi kilometriä ovat pääasiassa kiilleliusketta. Kiilleliuske voidaan jakaa ylempään ja alempaan ryhmään, joiden välille asettuu Outokummulle erikoislaatuinen ofioliittinen yksikkö, jota puolestaan ympäröi mustaliuske. Paikoittain kiilleliuskeen seassa esiintyy myös kloriitti-serisiittiliusketta sekä biotiittigneissiä. Pohjimmaisena kairasydämessä yli kahden kilometrin syvyydelle mentäessä kivi vaihtuu pegmatoidiryhmäksi koostuen pääasiassa pegmatiittigraniitista.
Outokummun malmin syntymalliksi Peltonen et al. (2008) ehdottavat kolmivaiheista prosessia, jonka alussa kuparimalmi muodostuu merellisessä ympäristössä. Tämän jälkeen yhtäaikaisesti tektonisen kuljetuksen aikana nikkeli sekoittuu kuparin kanssa voimakkaassa karbonaatio-silisifikaatiossa muodostaen Outokumpu-tyyppisen Cu-Co-Zn-Ni-Ag-Au-sulfidimuodostuman aikavälillä 1,95–1,88 miljardia vuotta sitten.
34
Hämäläinen, K. (Kati). "Happamat sulfaattimaat ja niiden aiheuttama kuormitus Suomen rannikkoalueilla ja Itämeren vesistöissä." Bachelor's thesis, University of Oulu, 2018. http://urn.fi/URN:NBN:fi:oulu-201805312082.
Повний текст джерелаАнотація:
Happamia sulfaattimaita edeltäneet sulfiittimaat ovat muodostuneet muinaisen Litorinameren alueelle noin 4000–8000 vuotta sitten. Maaperän hapettuessa sulfiittimaista muodostuu monimutkaisten kemiallisten reaktioiden seurauksena sulfaattimaita, joista alhaisen pH:n vuoksi lähtevät alkuaineet liikkeelle kuormittaen erityisesti vesistöjä. Happamat sulfaattimaat ovat yleinen ilmiö Suomen rannikkoseudulla ja erityisesti Pohjanmaan alueella. Ihmisen toiminta, esimerkiksi maanviljely, metsätalous ja kaivostoiminta, lisäävät happamuuden aikaan saamaa kuormitusta, minkä vuoksi ympäristöhaittoja on pyrittävä ehkäisemään erilaisilla menetelmillä.
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Kiuttu, L. (Lotta). "Ylivieskan gabrointruusio osana svekofennistä mafis-ultramafista magmatismia." Bachelor's thesis, University of Oulu, 2017. http://urn.fi/URN:NBN:fi:oulu-201711253171.
Повний текст джерелаАнотація:
Ylivieskan gabroperidotiitti-intruusio sijaitsee Kotalahden nikkelivyöhykkeellä Keski-Pohjanmaalla, noin viiden kilometrin päässä Ylivieskan kirkonkylästä. Intruusio koostuu pääosin kerroksellisesta gabrosta, mutta pitää sisällään myös kuppimaisen peridotiitti-intruusion sekä muita mafis-ultramafisia kivilajeja. Tutkielman tarkoituksena oli tutustua Ylivieskan intruusion gabro-osan petrografiaan Pyhäsalmi Mine Oy:ltä saatujen näytteiden avulla sekä tarkastella intruusiota osana synorogeenista mafis-ultramafista magmatismiä. Intruusio on tutkielman tulosten mukaan tyypillinen svekofenninen mafis-ultramafinen intruusio vastaten genetiikaltaan, petrografialtaan sekä mineralogialtaan muita svekofennisiä Ni-Cu esiintymiä sekä Kotalahti-tyypin intruusioita.
Polarisaatio- ja malmimikroskoopilla sekä röntgenmikroanalysaattorilla suoritettujen tutkimusten tuloksien perusteella Ylivieskan gabron kerroksellisesta osasta olevat näytteet koostuivat oliviinigabronoriitista, gabronoriitista sekä noriitista. Yhdessä näytteessä esiintyi Ylivieskan intruusiolle tyypillistä kumulusplagioklaasia. Pyrokseenin muuttumista amfiboleiksi oli havaittavissa kahdessa näytteessä. Molemmat näytteistä olivat myös mineralisoituneita sisältäen pääosin magneettikiisua, pentlandiittia, rikkikiisua sekä kuparikiisua.
Ylivieskan gabroperidotiitti-intruusiossa riittää paljon tutkittavaa myös jatkossa. Eri magmatyyppien ikiä ja keskinäisiä leikkaussuhteita ei ole pystytty arvioimaan luotettavasti. Gabron ja peridotiittimuodostuman väliset suhteet vaativat lisäksi vielä varmistamista. Mahdollisesti kontaminoituneet pyrokseniitit sekä primitiivisemmän tyypin peridotiitit ovat uusimman tutkimustiedon perusteella malminetsinnällisesti mielenkiintoisimpia jatkotutkimuskohteita. Jotta malmipotentiaalisemmat alueet voitaisiin rajata tarkemmin, täytyisi eri magmatyyppien erot tunnistaa paremmin.
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Sarajärvi, V. (Vesa). "Eteläisen Lapin ja Koillismaan jäätikkösyntyiset maaperämuodot ja niiden syntyolosuhteet." Bachelor's thesis, University of Oulu, 2018. http://urn.fi/URN:NBN:fi:oulu-201810042881.
Повний текст джерелаАнотація:
Tämä opinnäytetyö kuvaa Suomen glasigeenisiä maaperämuodostumia, ja niiden syntyolosuhteita. Esimerkkialueena ja esimerkkeinä on käytetty pääasiassa Koillismaan ja eteläisen Lapin alueilla Veiksel-jäätiköitymisen aikaan syntyneitä muodostumia. Ne edustavat hyvin vastaavia muodostumia koko Suomessa. Tarkastellulla alueella on runsaasti kaikkien Veiksel-jäätiköitymis- ja peräytymisvaiheiden tuloksena syntyneitä maaperämuodostumia, joita edustavat mm. alueen drumliinikentät ja kumpumoreenijonot, sekä Pudasjärveltä Hossaan ulottuva jäätikkökielekkeiden saumavyöhyke, jossa on runsaasti glasifluviaalisesta aineksesta koostuvia harju- ja kumpumuodostumia. Alueen moreenistratigrafia kuvastaa hyvin Veiksel-aikaisen jäätikön dynamiikkaa ja sitä tukevat alueella havaitut muodostumien morfologiset suuntaukset, sekä virtauskielekkeiden uurresuunnat.
Post- ja periglasiaalisten prosessien tuloksena syntyneet routa-, tuuli- ja aaltomuodostumat, sekä glasigeeniset meri- ja järvisedimentit on rajattu tarkemman tarkastelun ulkopuolelle, koska post- ja periglasiaaliset prosessit eivät ole vaatineet jäätikön välitöntä vaikutusta, eivätkä siten tässä yhteydessä katsota olevan glasigeenisiä.
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Juutinen, M. (Mitro). "Rautuvaaran rikastushiekka-altaan pintaosan rapautuminen." Bachelor's thesis, University of Oulu, 2018. http://urn.fi/URN:NBN:fi:oulu-201811153052.
Повний текст джерелаАнотація:
Rikastushiekka-allas on malminrikastuksessa syntyvän jätteen eli rikastushiekan läjitysalue ja loppusijoituspaikka. Altaat perustuvat ympäristön ja yleisen turvallisuuden huomioon ottamiselle, sillä rikastushiekka-altaisiin sijoitettava aines voi olla merkittäväkin haitta ympäristön eri osille, kuten pohjavedelle ja sitä kautta myös ihmisille. Jätteistä syntyvä uhka perustuu niissä oleviin haitta-aineisiin ja niiden käyttäytymiseen ympäristössä. Suurimman riskitekijän aiheuttaa kuitenkin rikastushiekoissa olevat herkästi hapen vaikutuksesta rapautuvat sulfidimineraalit, jotka rapautuessaan voivat tuottaa happamia valumavesiä. Rautuvaaran rikastushiekka-altaan pintaosan rapautumista tutkittiin osana Biopeitto-projektia.
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Repo, W. (Wille). "Rantamuodostumat." Bachelor's thesis, University of Oulu, 2018. http://urn.fi/URN:NBN:fi:oulu-201811153053.
Повний текст джерелаАнотація:
Rantojen monimuotoisuus johtuu rantaa muovaavista eroosiotekijöistä, joista tärkeimpiä ovat tuulten ohjaama aaltoenergia, rannan läheisyyden pintavirtaukset sekä vuorovesikanavat. Rantoja voidaan luokitella niiden sijaintiin mantereeseen nähden, sekä eri ominaisuuksien, kuten rannan sedimenttimateriaalin ja muodon perusteella. Rantakerrostumat ovat rannan prosessien tuloksia, ja niihin kuuluvat myös veden alla olevien rantavyöhykkeiden kerrostumat. Kerrostumien sedimenttikoostumukset vaihtelevat eri osissa rantaa riippuen aaltojen energiatasoista ja rannan kaltevuudesta. Myös vallitseva sää vaikuttaa aaltojen toimintaan, sillä esimerkiksi myrskyisellä säällä aallot kuljettavat usein sedimenttejä tavallista kauemmaksi mantereelle. Rannan maa-aineskerrokset muodostavat fasiessekvenssejä, jotka ovat pystysuuntaisia eli vertikaalisia leikkauksia rannan kerrosrakenteesta. Rantojen vertikaalileikkausten koostumukset ja muoto vaihtelevat riippuen rannalla vallitsevista rannalle sedimenttimateriaalia tuovista eroosiotekijöistä ja siitä, onko merenpinta korkealla eli transgressiivisessa tilassa, vai taantumatilassa eli regressiossa.
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Allonen, O. (Oona). "Arteesisen akviferin syntyyn ja veden laatuun vaikuttavat tekijät." Bachelor's thesis, University of Oulu, 2018. http://urn.fi/URN:NBN:fi:oulu-201812183293.
Повний текст джерелаАнотація:
Suomen talousvesien vedenotossa suositaan pohjavettä. Pohjaveden runsaan ja alati kasvavan käytön vuoksi on tärkeää tuntea pohjavesien muodostumiseen ja veden laatuun vaikuttavia maaperän ominaisuuksia. Tässä työssä esitellään yleisesti käytettyjä malleja, joilla veden ja pohjaveden liikettä maaperässä kuvataan. Lisäksi käydään läpi maapallon veden kiertokulkua, sillä on hyvä ymmärtää, mistä maaperään suotautuva vesi on peräisin ja mitkä tekijät, kuten sadanta ja haihdunta, vaikuttavat sen määrään ja määrän heittelyyn.
Akviferityypeistä esitellään ensin yleisellä tasolla vapaapintaisen ja salpautuneen akviferin ominaisuuksia. Sitten esitellään esimerkinomaisesti Säkylänharju-Virttaankankaan akviferialuetta, jota luonnehtii jäätikkövirtausten väliin kerrostunut hyvin vettä johtava harjuydin ja lieveosien vettä salpaavat hienorakeiset kerrostumat. Toinen esimerkkinä esitelty alue on Kurikassa sijaitseva Kuusistonloukon pohjavesialue. Kurikan akviferialueen arteesisen pohjaveden alueelta kerätyn näytesarjan maakerroksista määritellään vettä todennäköisesti salpaavat kerrokset määrittämällä näytteille vedenläpäisevyydet.
Pohjaveden laatuun vaikuttavista tekijöistä nostetaan esille geologisia ja hydrologisia tekijöitä. Maaperän ominaisuuksista mineraalikoostumus vaikuttaa dramaattisesti veden happamoitumisherkkyyteen. Raekoostumus vaikuttaa paitsi haitta-aineiden suodattumiseen myös siihen, kuinka paljon suoloja liukenee maaperästä pohjaveteen.
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Chan, Si-man, and 陳詩敏. "A case study of a sub-degree programme's development potential." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2013. http://hdl.handle.net/10722/198872.
Повний текст джерелаАнотація:
The sub-degree sector is expanding rapidly after the announcement of the Policy Address in 2000 by the former Chief Executive Mr. Tung Chee-hwa. Sub-degree is introduced in Hong Kong in order to build a diversified and flexible higher education system. Since then more and higher education institutions offer self-financing sub-degree programmes. It seems that sub-degree programmes are oversupplied in the market; and there is uncertainty in articulation and employment of the sub-degree graduates. This issue has stirred up much controversy among the community and causes for our greatest concern. In recent years, the number of full-time accredited self-financing local 4-year degree programmes offered by private institutions grows tremendously. With the recent growth of this new qualification, the average intakes of sub-degree programmes would somewhat be affected.
HKU SPACE Community College has been selected as a case study of this research. Students and staff in the Community College have been surveyed and interviewed. The study examines their views on the sub-degree programmes offered by the community colleges and the self-financing local 4-year degree programmes offered by the private institutions. From the findings of the research, it is evident that sub-degree is a valuable educational attainment in term of articulation and employment; and sub-degrees still have the development potential and will not be replaced by the self-financing local 4-year degrees offered by the private institutions.published_or_final_version
Education
Master
Master of Education
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Dyer, Hilary. "Learning to know, knowing to learn : the lived experiences of participants on a Doctor of Education programme." Thesis, University of Surrey, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.340405.
Повний текст джерела
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Wolf, Linda Eileen. "A Study of Socialization of Accelerated BSN Graduates." Kent State University / OhioLINK, 2007. http://rave.ohiolink.edu/etdc/view?acc_num=kent1182781854.
Повний текст джерела
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Maxwell, Judith Margaret, and judy maxwell@rmit edu au. "Contesting the Culture of the Doctoral Degree: Candidates' Experiences of Three Doctoral Degrees in the School of Education, RMIT University." RMIT University. Education, 2009. http://adt.lib.rmit.edu.au/adt/public/adt-VIT20091029.144203.
Повний текст джерелаАнотація:
This study is situated within a context of the changing role and value of the university, particularly in terms of a renewed focus on the importance of 'practical' research. It seeks to explore candidates' experiences of the culture of three doctoral research degrees in the School of education, RMIT University. The degrees in question are the Doctor of Philosophy by thesis, the Doctor of Philosophy by project and the Doctor of Education. The research sought to problematise and contest current understandings of doctoral candidates' experiences by highlighting complexities in the process and identifying differences and similarities between each of the three degrees. The main research question is 'How do candidates perceive the respective cultures of traditional, practice-based and professional doctoral education?' A nested, multiple-case study of the three doctoral modes was used to address three sub-questions, which focused on the norms and practices of candidates ; the extent to which their needs and expectations were met; and differences in their notions of research and practice. Differences and similarities between the degrees are analysed, leading to answers to the fourth sub-question which sought to identify what can be learned in terms of supervisor pedagogy and learning support. The research design was underpinned by a Bourdieuian epistemology and a critical theoretical perspective. Bourdieu's theory of practice with its conceptual tools of habitus, field, capital, agent and practice allowed analysis of candidates' experiences and the doctoral structures within which their practice resides through one critical lens. The data revealed many issues common to all doctoral programs. These include the importance of understanding the various habitus' and relative amounts of cultural capital of candidates, and the impact of a perceived lack of learning community. Other findings related to ambivalence regarding the types of cultural and social capital appropriate for do ctoral candidates not aiming to work in an academic environment where these are in conflict with the workplace. Three meta-themes were developed: tensions between and within the field; challenges to autonomous principles; and the importance of habitus and cultural capital in doctoral study. The study added to the literature aimed at increasing understanding of candidates' trajectories toward success in the doctoral field, thereby informing supervisor and learning support pedagogy. Five recommendations were proposed, aimed at producing a vibrant doctoral learning community with a deeper understanding of candidates' issues.
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Kovacevic, I. (Ivana). "Congestion control and spectrum sharing in multi-operator multi-hop wireless network." Master's thesis, University of Oulu, 2015. http://urn.fi/URN:NBN:fi:oulu-201503111139.
Повний текст джерелаАнотація:
Emergence of dramatic increase in applications provided by smart devices, such as smart phones, is no longer supported by traditional telecommunications systems such as wireless cellular systems. Arising challenges are ever increasing traffic demand, shortage of available spectrum and congestion over wireless systems. On the other hand, network resources such as spectrum and computational capability, are severely under-utilized. With regard to efficient use the available resources, promising trend is to develop heterogeneous networks (HetNets) such that different operators can share their excess capacities among themselves with the previous agreement. The most research done in spectrum sharing is focused only on the network access point. In this thesis work we extend the modelling of the spectrum sharing problem to include all links on the route for a given session. While this problem might have been analyzed from the point of view of route availability our control system is focused on queue management across the network that maintains predetermined spectra sharing rules at the session level of each operator. Addressing an issue of congestion over wireless system different congestion control mechanisms are presented and analyzed enabling a variety of options for managing traffic across the spectra sharing network. These models are generalized to include different pricing mechanisms. Two approaches are taken for analyzing pricing models with congestion control mechanism. First, network nodes are modeled as two-dimensional Markov processes. Since memoryless nature of Markov process imposes restrictions on analyzed system, in order to generalize analysis, averaged non-Markov models are introduced. Performance metric used for assessing different models is average packet dropping rate.
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Tiwari, K. (Kushal). "PAPR aware power allocation in OFDMA uplink." Master's thesis, University of Oulu, 2015. http://urn.fi/URN:NBN:fi:oulu-201505281714.
Повний текст джерелаАнотація:
This thesis investigates the power allocation scheme and essential design constraints to be considered in multicarrier systems particularly in the case of orthogonal frequency division multiple access (OFDMA) system in multiuser (MU) scenario. The compatibility between multicarrier system and multiple input multiple output (MIMO) system is exploited in designing the power allocation algorithm for a cellular network with multiusers. The multicarrier MIMO system facilitates dynamic resource allocation due to the decomposition of physical resources into multiple domains. The energy efficiency and interference management are the crucial aspects especially in uplink (UL) transmission. Limiting the power consumption of mobile terminals (MT) in uplink (UL) is inevitable due to the limited amount of available energy. Furthermore, the traditional multicarrier system introduces a dynamic peak power variation with respect to average power causing erroneous circuit behavior. This phenomenon is usually quantified as peak to average power ratio (PAPR). High PAPR drives the high power amplifier (HPA) into non-linear region to result in significant degradation in the system performance in terms of power efficiency. In this thesis an iterative power allocation algorithm is proposed to minimize the sum power and PAPR.
This thesis presents the power allocation strategy such that the PAPR is controlled during the power allocation (minimization) stage in frequency domain. The optimal power allocation is achieved by joint optimization of transmit power and receive beamformers (TX-RX) using convex optimization technique. The original problem is not jointly convex with respect to TX-RX. Therefore an iterative algorithm is proposed to optimize TX and RX alternatingly such that by calculating TX for given fixed set of RX and vice versa until convergence. The statistical approach is adopted to reduce the PAPR by actually minimizing the signal power variance (SPV) due to the fact that the large number of independent and identically distributed complex OFDMA symbols tends to follow Gaussian probability density function characterized by certain mean and variance. The non-convex constraints in the formulation are transformed into convex form using the successive convex approximation (SCA) with required change of variable (COV). The algorithm guarantees to maintain the user-specific quality of service (QoS) defined by the rate constraint.
Hence, equipped with the potentials of future generation technologies and using convex optimization as a tool, this thesis offers a sum power and PAPR minimization scheme for MU SIMO-OFDMA UL transmission.
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Jayasinghe, L. (Laddu). "Performance analysis of MIMO dual hop AF relay networks over asymmetric fading channels." Master's thesis, University of Oulu, 2014. http://urn.fi/URN:NBN:fi:oulu-201406061693.
Повний текст джерелаАнотація:
We analyze the performance of dual-hop multiple-input multiple-output (MIMO) amplify-and-forward (AF) relay systems by considering the source-to-relay and relay-to-destination channels undergo Rayleigh and Rician fading, respectively. Several MIMO techniques and practical relaying scenarios are considered to investigate the effect of such asymmetric fading on the MIMO AF relaying systems.
First, we investigate the performance of the optimal single stream beamforming on non-coherent AF MIMO relaying. We use tools of finite-dimensional random matrix theory to statistically characterize the instantaneous signal-to-noise ratio (SNR). The closed-form expressions of the cumulative distribution function, probability density function, and moments of SNR are derived and used to analyze the performance of the system with outage probability, bit error rate (BER), and ergodic capacity. Numerical simulations are carried out to investigate the effects of the Rician factor, rank of the line-of-sight (LoS) component, and the number of antennas at the nodes on the system performance. Additionally, the performance is compared with orthogonal space-time block-coding (OSTBC) based AF MIMO system.
Next, we investigate relay selection schemes for non-coherent dual-hop AF relaying with OSTBC over asymmetric fading channels. We propose two relay selection methods as optimal and sub-optimal schemes. The performance of proposed schemes are discussed with respect to the outage probability, BER and the ergodic capacity.
Finally, we study the effect of co-channel interference (CCI) and feedback delay on the multi-antenna AF relaying over asymmetric fading channels. Here, transmit beamforming vector is calculated using outdated channel state information due to the feedback delay from relay-to-source, and the relay node experience CCI due to frequency reuse in the cellular network. The performance is investigated using the outage probability, BER and ergodic capacity to analyze the effect of the Rician factor, CCI, feedback delay and number of antennas.
All these discussions are useful to evaluate the performance of AF MIMO systems in asymmetric fading channels. Our analysis suggests that having good LoS component increases the performance of the system for multiple-input-single-output (MISO) and single-input-multiple-output (SIMO) scenarios of relay-destination channel. Having good scattering component increases the performance for MIMO cases.
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Sultan, A. (Akmal). "Understanding the impact of spatial reuse on autonomous sensing order channel selection." Master's thesis, University of Oulu, 2016. http://urn.fi/URN:NBN:fi:oulu-201612103244.
Повний текст джерелаАнотація:
In wireless communication systems, there is a need to design efficient schemes in order to overcome the problem of spectrum scarcity. One technology to address the problem of spectrum scarcity is cognitive radio (CR), in which a network entity is able to adapt intelligently to the environment through observation, exploration and learning.
When multiple autonomous cognitive radios are searching for spectrum opportunities, they face competition from each other in order to access the available free channel. This will result in reduced throughput which occurs due to collision between cognitive radios, when they try to transmit in the same channel.
The purpose of this thesis is to study a smart adaptation scheme for efficient channel access which enable autonomous cognitive radios to improve their overall bandwidth efficiency in a distributed cognitive radio network with the help of spatial reuse.
An adaptive persistent strategy with efficient collision detection has been studied in this work for autonomous channel sensing order selection which enable distributed CRs to avoid collision and allow them to improve their overall system efficiency by increasing the average number of successful transmissions, especially, when number of available channels are less than the number of CRs competing to access these free channels.
The performance of the studied strategy is compared with random selection of sensing orders. Simulation results are presented, which indicate that the studied strategy with spatial reuse achieves the highest number of successful transmissions in a given time slot as compared to other strategies. Simulation results are also compared for the case with no spatial reuse and the results indicate that it degrades the system efficiency by reducing the average number of successful transmissions in a given time slot.
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Hadkhale, I. (Ishwor). "Faster than Nyquist signaling and analysis of Its performance under uncoded/coded transmission systems." Master's thesis, University of Oulu, 2015. http://urn.fi/URN:NBN:fi:oulu-201505281713.
Повний текст джерелаАнотація:
The future demand of increased transmission rate and bandwidth efficiency is of prime concern in the modern wireless communication systems. Faster than Nyquist signaling (FTN) is under the great interest of research to address this issue of high data rate, which is also a major requirement, for the fifth generation (5G) communication networks.
The data bits are transmitted at a rate higher than the conventional methods which are bounded by the Nyquist condition and the outputs are compared so as to analyze the benefits. Receiver processing techniques are implemented to achieve the high data rate with improved error performance at the lower decoding complexity.
Considering the bandwidth efficiency as a key factor, more data symbols are sent at the given time interval by reducing the time period for signal transmission. This ensures more data being transmitted. In the scenario of perfect Nyquist signaling, pulse designs were based on the principle of orthogonality. The signal pulse form h(t) is orthogonal with respect to shifts by nT, where T is the signaling interval. In the thesis, the time period is reduced to T < 1, which prompt more symbols to be transmitted. The pulses are no longer orthogonal. These non orthogonal FTN signals are accepted as a promising approach for the required solution of increased data rate.
FTN comes as a tradeoff between the high data rate achievement and error probability. Reduction of the time factor affirms good data rate but at the same time, cost of high error rate has to be paid. Efficient receiver processing techniques are designed to compensate between these two factors. Main obstacle due to the reduction of time period in FTN signaling is to tackle the unavoidable inter symbol interferences (ISI). Going beyond the Nyquist bound, as a consequence, results high ISI. This necessitates an effective receiver processing to overcome the ISI. Minimum mean square error (MMSE) detection algorithm is employed to equalize the received signals and analyze the performance of the FTN system.
Finally, the system portrayal is studied by processing the results under the implementation of turbo coding systems. The bit error rate (BER) characteristics are analyzed under these circumstances. Efficient encoding pattern and decoding algorithm helps in reducing the errors. Analysis of the simulation results show that the turbo code proficiency is improved by increasing the number of iterations. Performance indication is also related to the frame size or the interleaver size and the signal power. In other words, it comes as a trade-off between energy efficiency, bandwidth efficiency, complexity and error rates.
Furthermore, for the fair comparison of the performance analysis, transmission rates for turbo coded transmission systems under the conditions of Nyquist signaling and FTN signaling are made equivalent.
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Virk, M. (Muhammad). "Design and implementation of a multi-purpose Wireless Body Area Network." Master's thesis, University of Oulu, 2013. http://urn.fi/URN:NBN:fi:oulu-201306061569.
Повний текст джерелаАнотація:
A wireless body area network (WBAN) is a collection of miniaturized and energy efficient wireless sensor nodes which monitor human body functions and its surroundings. It has been observed that WBANs perform single application per network, computation and storage capacities are scarce and there is no or limited mobility support. Technically complex WBAN application solutions today, find refuge in processing computationally complex data external to WBANs, i.e., processing sensor data on a conventional PC which is impractical and clumsy. There is a strong need for WBAN platforms which can perform computationally complex tasks on their own having enough resources in terms of computation and memory but still consuming as low power as possible in order to prolong network uptime.
In this thesis work, an improved WBAN named multipurpose-BodyNet (MPBodyNet) is implemented. It has enough computational and memory resources and compact software solutions to achieve high performance and fidelity. MPBodyNet is a self-configuring, multipurpose WBAN which can perform multiple applications and user can switch between applications by a mere push of button. It supports mobility and it acts like an agent network to other networks. MP-BodyNet forms a hierarchy where low-capability networks are supported by higher-capacity networks.
Hardware used for MP-BodyNet has been designed by WSN-Team at Centre for Wireless Communications, University of Oulu and this thesis proposes two application scenarios. Senior citizen protection mode (SPM) deals with a very hot health care issue for elderly people and patients. An algorithm is proposed and implemented that can detect falls or if the subject/patient has fainted. In SPM, MP-BodyNet can generate alarms in case of emergency and events can be seen on a central server as well as a special alarm is generated to the user’s phone (android app.) which can in turn establish an emergency call automatically. Algorithmic efficiency achieved is 100%.
Silent communication mode (SCM) deals with a military hand signal/gesture recognition application. A quite complex pattern recognition algorithm has been proposed with two novelties in it i.e., a sampling process is introduced in the algorithm and the whole algorithmic processing is supposed to be done on the sensor node itself, no processing is supposed to be happening external to the WBAN. Algorithm for SCM is only presented here conceptually after rigorous research about the subject at disposal. It is not implemented in this thesis due to lack of time and is saved for future development. After a gesture would be recognized, an audio message mapped to the gesture will be heard over a headphone.
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Sethi, A. (Alok). "Self-interference channel and analog baseband cancellation for full duplex transceiver." Master's thesis, University of Oulu, 2013. http://urn.fi/URN:NBN:fi:oulu-201308311677.
Повний текст джерелаАнотація:
Full duplex (FD) radios are the next generation wireless paradigm to answer the growing demand of high capacity along with energy and spectrum efficient wireless transceivers. Given the colossal power difference between the transmit and receive signal, self-interference cancellation becomes one of the key challenge in the design of a FD radio. A model of self-interference channel is required to develop a robust cancellation mechanism. One of the key contribution of this thesis is to define the properties of the self-interference channel. Furthermore, an analog baseband cancellation mechanism for FD transceivers is also defined, which can be used as a cancellation stage before the signal goes to digital domain.
The self-interference channel was measured using ultra wide-band antennas (UWB). Narrow-band measurement technique i.e., a vector network analyzer (VNA) was used for the channel measurements. Spatial resolution of 4.3 cm was achieved. Measurements were done in variety of locations including an anechoic chamber with different antenna orientation. Antennas were mounted on an old laptop frame. Coherence bandwidth of the self-interference channel was found to be varying between 1 MHz and 10 MHz, effectively making it a frequency selective channel. The average amount of isolation was found to be around 40 dB irrespective of the antennas relative orientation. It was also observed that a major amount of power was transferred because of direct coupling between the antennas and this coupling was due of the frame on which antennas were mounted.
Using the defined analog baseband cancellation mechanism, an orthogonal frequency division multiplexing (OFDM) based transceiver was simulated using Matlab. The impact of different bit analog-to-digital converter (ADC), digital-to-analog converter (DAC), different training sequence length for the desired and the self-interference channel, were observed in the simulations. The simulations were performed for both 16 and 64 quadrature amplitude modulation (QAM). Training symbols were used in front of the data frame to estimate both the desired and self-interference channel and also to set the gain of variable gain amplifiers (VGA). The least square algorithm was used for the estimates. The self-interference power was set to −20 dBm and thermal noise floor was set to −81.68 dBm. It was found that a twelve bit ADC along with a sixteen bit DAC would provide a performance within 1.5 dB of theoretical performance.