Dissertations / Theses on the topic 'Oyo State'

The purpose of this study was to identify the curricula emphases of home economics in Oyo state secondary schools, and to analyze the relationship between subject matter emphasis and selected aspects about teaching and the teacher. Sixty-two home economics teachers in Oyo state, Nigeria, responded to a mailed survey asking them to indicate the degree of emphasis given to 50 topics in five subject matter areas of home economics: Human Development and the Family, Home Management and Family Economics, Foods and Nutrition, Textiles and Clothing, and Housing. The most taught subject matter area was Foods and Nutrition followed by Home Management and Family Economics, Textiles and Clothing, Human Development and the Family, and Housing. A similar rank order was observed for subject matter competence and for preference for teaching subject matter. Scores on the topics within each subject matter area, however, indicated that all of these topics and the subject matter areas were moderately emphasized in the curriculum. The philosophical views of home economics as homemaking education; home economics as household management and home economics as cooking and sewing exist concurrently. Multiple regression analysis was used to examine the relationship between the above five subject matter areas and selected aspects about teaching and the teacher. The results of the multiple regression analysis indicated no significant relationship. Some of the problems facing home economics as a subject in the secondary schools were lack of laboratory space, equipment, finance, and shortage of home economics teachers. Collaborative curriculum development and local co-operative responses may offer the means to overcome the shortage of resources for programs in specific locales. Further research in the form of case studies of successful home economics programs could be informative in understanding better the necessary components which should be fostered in strengthening home economics programs.
Education, Faculty of
Curriculum and Pedagogy (EDCP), Department of
Graduate

The nonuse of community correction in the Nigeria criminal justice system has led to increased recidivism, contributed to prison congestion, introduced the risk of prison victimization, and lacked the provision of a rehabilitative structure for nonviolent offenders. The purpose of this phenomenological research study was to explore Nigerian judges’ use of alternatives to incarcerations for nonviolent offenders. Dolinko retributive punishment theory provided the theoretical framework for this study. Ten participant judges comprised the study sample from a purposeful and criterion random sampling method. Data were collected from participants through structured interviews and were coded manually, sorted, and analyzed using the Saldana data coding process framework. According to study findings, judges were inclined to use alternatives to incarceration for nonviolent offenders. Also, community correction could reduce overcrowding in prisons and provide the opportunity for self-improvement for nonviolent offenders supervised in the community. The implications for positive social change include a better understanding and implementation of community corrections for Nigeria judiciary and policymakers and the use of alternatives to incarceration for nonviolent offenders, which would improve rehabilitation, reformation, and reintegration of offenders into society.

Magister Public Health - MPH
Ensuring that routine health information systems provide good quality information for informed decision making and planning in health systems remain a major priority in several countries and health systems. The lack of use of health information or use of poor quality data in health care and systems results in inadequate assessments and evaluation of health care and result in weak and poorly functioning health systems. The Nigerian health system like in many developing countries has challenges with the building blocks of the health system with a weak Health Information System. Although the quality of data in the Nigerian routine health information system has been deemed poor in some reports and studies, there is little research based evidence of the current state of data quality in the country as well as factors that may influence data quality in routine health information systems. This study explored the data quality of routine health information generated from health facilities in Oyo State, Nigeria, providing the state of data quality of the routine health information. This study was a cross sectional descriptive study taking a retrospective look at paper based and electronic data records in the National Health Management Information System in Nigeria. A mixed methodology approaches with quantitative to assess the quality of data within the health information system and qualitative methods to identify factors influencing the quality of health information at the health facilities in the district. Assessment of the quality of information was done using a structured evaluation tool looking at completeness, accuracy and consistency of routine health statistics generated at these health facilities. A multistage sampling method was used in the quantitative component of the research. For the qualitative component of the research, purposive sampling was done to select respondents from each health facility to describe the factors influencing data quality. The study found incomplete and inaccurate data in facility paper summaries as well as in the electronic databases storing aggregate information from the facility data.

In the context of international agendas to transform African States from a state of corruption to good governance, Oyo State’s transformation in 2011 provides an apparent fairy tale case study. For eight years, the state was synonymous with violence and ‘godfatherism’, but Governor Abiola Ajimobi’s election in 2011 brought the promise of transformation, in line with the Lagos Model, based on the highly celebrated example of nearby Lagos State. This thesis draws on six months of in-depth qualitative fieldwork in Ibadan, the capital of Oyo State, to show how the Lagos Model in Oyo State leveraged international conceptions of good governance to pursue a political strategy of autonomy from central government, whilst building on long-held progressive political ideas in Yorubaland. However, the Lagos Model faced competition from populist opposition, who drew on the failings of the Lagos Model to meet popular conceptions of good governance. Key themes in popular conceptions of good governance are: progress, legitimate leadership and economic benefits. This thesis analyses the tensions within the Lagos Model’s response to these themes and uses empirical material to reveal how these tensions play out in practice. The ways in which Ajimobi was required to respond to numerous competing conceptions of good governance complicates the initial theoretical framing of a binary between corruption and good governance.

Background Nigeria, with a population growth rate (2000-2005) of 2.5% and with 5% of the total population aged 60 years and above, has the potential for a rapid growth rate of the older population in coming years.1 The implication of this in a country with large population as reported by the National Population Census 2006, limited number of health care professionals and care homes, is difficulty in meeting the various needs of the elderly, hence, the importance of identifying the palliative care needs of the elderly. Aim The study was set out to assess the palliative care needs of and provision of care to elderly patients seen in the selected clinics of the University College Hospital, Ibadan, Oyo state, Nigeria. Objectives 1. To describe characteristics of elderly patients seen in the selected clinics. 2. To explore the current use of the hospital palliative care team in the care of geriatric patient. 3. To explore the current use of the hospital palliative care team in the care of geriatric patient. Methods A descriptive cross-sectional study was conducted over a 3-month period using an interviewer administered questionnaire after full consent was given by participants. The questionnaire was a combination of the Africa Palliative Care Outcome Scale (APCA-POS), the Edmonton Symptom Assessment Scale (ESAS) and Hope Spiritual Assessment Tool. Demographic information regarding gender, age, nationality, abode and referral to the Care Centre was obtained. Scaled questions from selected tools were ticked with respect to physical, psychosocial and spiritual needs and expectations of palliative care. The validated data collection tools (APCA-POS, ESAS, HOPE) were used in the questionnaire. Ethical approval was obtained from the relevant organizations. Data was analysed using IBM SPSS statistics 21. Results 424 participants completed the questionnaire and most patients (330; 77.8%) were recruited from the geriatric wards with a 2:1 female to male ratio. Most participants fell in the 60 -69 year-old age group. The most common symptom was pain in 240 patients with moderate pain in single or multiple areas. A high percentage (45.8%) were moderately worried about their disease condition and only 66 out of 422 freely discussed this feeling with their family members. Other symptoms observed were nausea, vomiting, constipation and loss of appetite. Conclusion The study showed the palliative care needs of the elderly and calls for collaboration between the palliative care team and the physicians in the geriatric unit for better management of the needs of the elderly.

The quantity of solid waste generated in Nigeria has increased at an alarming rate over the decades with lack of efficient and sustainable waste management in most cities of the country. This can be attributed to incessant increase in population, expansion of urban areas, industrialization and consumption rates. This study focuses on the ancient city of Ibadan and used Ibadan North Local Government as the case study. There are many environmental and sanitation problems in Ibadan due to improper waste management by the stakeholders involved. The result and analysis of the situation reveals that there are indications that most residents are ignorant of waste handling methods irrespective of their educational and economic status coupled with poor management of waste and lack of good environmental policy. The study analyzes options for adopting Integrated Solid Waste Management (ISWM) which comprises of waste hierarchy. Activities of Oyo State Solid Waste Management Authority (OSSWMA), Ibadan North Local Government (IBNLG) and Private Refuse Contractors (PRCs) in terms of technical know-how, financial capacity and waste equipment are not adequate to meet the tasks. In order to overcome these challenges, this research work discusses if and how Integrated Solid Waste Management can be implemented.

Philosophiae Doctor - PhD
Cancer is a major public health concern in both developed and developing countries; it accounts for 13% of all deaths globally, of which 70% occur in middle- and low-income countries. In Nigeria, over 10 000 cancer deaths and 250 000 new cases of cancer are recorded yearly. Breast cancer is the second most common cancer worldwide, after lung cancer. It is the most common type of cancer diagnosed in women and the most common cause of death worldwide. Late detection and diagnosis of breast cancer leads to high mortality rate. In Nigeria certain cultural taboos are associated with breast cancer, which lead to poor information dissemination to women in rural communities. Breast self-examination (BSE) provides an inexpensive method for early detection of breast tumours. Knowledge and awareness about Breast Self-Examination are critical to promote consistent practices when the people concerned are empowered with the needed information to acquire the knowledge and skills which will inform practice of any health issue. In Nigeria it was reported that the number of women at risk of breast cancer increased progressively from 24.5 million in 1990 to about 40 million in 2010. This number is projected to rise to over 50 million by 2020, should the trend continue unabated. The current study explored the understandings of breast cancer and prevention, with particular emphasis on BSE practice among rural women, and developed an empowerment programme to promote uptake of this practice in a rural community in a south-western state of Nigeria. The study was framed in the Health Belief Model and Kieffer’s empowerment process. Participatory action research was used as study design and approach; and utilized both qualitative and qualitative methods. The sample for quantitative phase comprised 345 women aged 20 to 60 years, selected from 5 communities using a cross-sectional procedure. Data gathering instrument was a questionnaire. Summative statistics were calculated using the SPSS program. The sample for qualitative phase comprised of 95 women who were selected from the respondents to the quantitative phase. The data was collected through focus group discussion. The qualitative data was subjected to thematic analysis. Three themes that emerged for qualitative analysis which are: knowledge/awareness of BSE, practice and appeal for intervention, and misconception and fear. The survey results showed that a large proportion of the respondents (75.1% and 76.5%) had low levels of knowledge about BSE and did not practice BSE. Also, about 77% of the respondents expressed one form of barrier or another to BSE practice. However, despite these inadequacies, 87% of the respondents were ready and willing to improve their health if empowered with the right information and motivation. The empowerment program informed by the quantitative and qualitative phases and the stages of change with the full participation of the women. The program consisted of hands-on physical demonstrations, BSE pamphlets, and mnemonic songs were identified media of disseminating knowledge and practice of BSE. These media became the platforms for the empowerment programme developed for the women. A day was also set aside, just as is done for immunisation, for BSE practice and other women’s health issues to promote the prevention of breast cancer in the community. The “Physical demonstration” intervention resulted in an increase in the correct BSE practice from 23.5% at the beginning of the study, to 85.3% post the intervention. The “other intervention” resulted in 80% to 94.7% of participating women being able to practice correct physical step-by-step performance of BSE. The participatory approach contribute to a high levels of participation by women in Iddo local Government which led to the increase in the correct Breast Self–Examination as stated above.

One of the oldest traditional crafts that provided employment for a significant proportion of the Nigerian population and practised specially by the Oyo Yoruba, is dressmaking by hand. The introduction of colonial rule and sewing machine in the region in early nineteenth century, not only revolutionised the art of dressmaking, but it also created a new and non-traditional craft: tailoring--the art of making clothes with the aid of a sewing machine. Over the years, dressmaking by hand has given way to tailoring, and tailoring has gradually become a dominant industry in the field of informal sector activities in Oyo State. The objectives of the study are (1) to describe the evolution and spatial diffusion of informal tailoring industry in the Oyo State metropolitan system, (2) to measure and explain the pattern of spatial variations of the diffusion, and (3) to explain the role of colonial and post colonial systems in the development and spatial diffusion of the industry in the state. It is hoped that from the evidence presented in the study, we can speculate on what spatial and historical structures that promote or hinder the development of informal tailoring activity, at least in the Nigerian metropolitan areas. The study area is Yorubaland, where the bulk of the population is Yoruba. The observation units at the inter urban level are sixteen selected centres, consisting of eleven divisional and five non-divisional headquarter towns. The intra urban observation units are the forty-five administrative wards and sub-wards of the Ibadan metropolitan area. In order to reconstruct and explain the historical and geographical evolution of the informal tailoring industry in colonial and post colonial Oyo State, the author adopted a multi data source approach principally to provide supplementary information. A historical geographical approach is adopted in the discussion on the relationship between the colonial and post colonial economic and spatial structures and the development and diffusion of tailoring industry. Also, in tracing the impact of these colonial structures on the tailoring development, emphasis is placed on a descriptive approach. To test the hypotheses on the relationship between the spatial diffusion of informal tailoring industry and urban hierarchy in Oyo State, a probability of location model is designed and used. Based on the probability of location index, the actual and the expected patterns of diffusion and development, in time and space, of the informal tailoring industry, are compared. The relevance of the variables included in the construction of the probability of location model is tested, using Spearman's Rank-Order Correlation method. (Abstract shortened by UMI.)

Glycogen stored in liver and muscles are the main energy source during hatching of poultry. Turkey embryos are very sensitive to perturbations in energy metabolism because they have a wider hatching window than chicken embryos. Mortality of turkey embryos during late-term incubation is high relative to chickens, and many surviving hatchlings have compromised vitality. In ovo feeding (IOF) improves the energy status and gut development of perinatal poultry by supplementing the amnion with nutrients, which is then orally consumed by the embryo prior to hatch. A survey of amnion and embryonic development was done to determine the best time, maximum volume and solution characteristics for IOF. Several IOF formulations containing combinations of carbohydrates, proteins and enteric modulators were tested in turkey eggs, with emphasis on comparing hydrolyzed soy protein to egg white. IOF was found to improve energy status at hatch, but subsequent growth performance results were inconsistent. Therefore, further studies were designed to better understand late-term turkey embryo metabolism, using a customized focused oligonucleotide microarray. A gene expression survey using this array was performed on liver, pectoral muscle, hatching muscle, duodenum, and ileum of turkey embryos from 20 days of incubation until hatch. The embryos were found to switch from yolk fat to carbohydrate-based metabolism around 22 days of incubation, and potential substrates were identified to be tested in ovo. A nutritive solution containing metabolic co-factors was then formulated and tested in a subsequent IOF experiment. At hatch, poults treated with this latest IOF formulation exhibited better quality scores and more symmetric legs than controls. Gene expression patterns of liver, pectoral muscle, hatching muscle, duodenum and ileum confirmed IOF favored skeletal development of poults. This dissertation research clearly demonstrated that in ovo feeding technology can enhance energy status and advance the development of hatchlings, resulting in superior poult quality.

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Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
Dissertacao (Mestrado)
IPEN/D
Instituto de Pesquisas Energeticas e Nucleares - IPEN/CNEN-SP
FAPESP:06/52787-0

The available data examining the influence of rotational grazing on rodent responses are limited. This study investigated how rotational livestock grazing practices influence small mammal rodent abundances and species diversity. We looked for evidence of variation in the occurrence and/or numbers of certain rodent species among three plant community types (grassland, shrubland, grass-shrub mix), managed with or without grazing. We used Sherman live traps over a total of eight trapping sessions. We totaled 486 trapnights for each of the six plant community and grazing management combinations. The three plant community types were identified by visual cover. Out of the eight different species we captured, only Peromyscus maniculatus (North American deermouse) and Reithrodontomys megalotis (western harvest mouse) had sufficient captures to be analyzed for differences in abundance. Using all eight species to calculate the Shannon’s diversity index for each plot, we found evidence that rodent species diversity is less in grassland habitats than in shrubland habitats or grassland/shrubland mixed habitats (p

Šiame darbe ištirta sergančiųjų 2-ojo tipo cukriniu diabetu gyvenimo kokybė ir emocinė būsena, atsižvelgiant į ligonio (lytis, amžius, kūno masės indeksas, išsilavinimas, socialinė grupė, šeiminė padėtis, žalingi įpročiai (rūkymas) ir ligos (cukrinio diabeto trukmė, komplikacijos, gydymo būdas, hipertenzija, mitybos įpročių ir fizinio aktyvumo pokyčiai nustačius cukrinį diabetą) veiksnius. Įvertintas gyvenimo kokybės ryšys su ligonio ir su ligos veiksniais. Išanalizuoti depresijos ir nerimo ryšiai su ligonio (lytis, amžius, kūno masės indeksas, išsilavinimas, socialinė grupė, šeiminė padėtis, žalingi įpročiai (rūkymas) ir su ligos veiksniais (cukrinio diabeto trukmė, komplikacijos, gydymo būdas, hipertenzija, mitybos įpročių ir fizinio aktyvumo pokyčiai nustačius cukrinį diabetą).
Quality of the life and emotional state of patients with type 2 diabetes depending on the factors of the patient (gender, body mass index, education, social group, marital status and harmful habits (smoking) and on the factors of the disease (duration of the diabetes, complications, treatment method, hypertension, changes of nutritional habits and physical activity after determination of DM) was analyzed. Also relation between quality of the life and factors of the patient (gender, body mass index, education, social group, marital status and harmful habits (smoking) and the factors of the disease (duration of the diabetes, complications, treatment method, hypertension, changes of nutritional habits and physical activity after determination of DM) was evaluated. Relation between depression, anxiety and factors of the patient (gender, body mass index, education, social group, marital status and harmful habits (smoking) and factors of the disease (duration of the diabetes, complications, treatment method, hypertension, changes of nutritional habits and physical activity after determination of DM) was analyzed.

 

I denna studie har jämförelse gjorts mellan Interacoustics Eclipse och GSI Audera i samband med Auditory Steady-State Respons (ASSR) mätningar.

Syftet med studien var att undersöka ASSR som metod, att utvärdera dess tillförlitlighet i jämfö­relse med tonaudiometri för personer med normal hörsel och personer med hörsel­nedsätt­ning. Avsikten var dessutom att undersöka om elektrod­placering­ på örsnibb eller på mastoid påverkade mät­resultatet, försökspersonens upplevelse av instrumen­­t­ens ljudstimuli, om de estimerade ASSR-värdena påverkades av att mättillfället påbörjades eller avslutades med Interacoustics Eclipse samt undersöka tiden för mätningarna.

En experimentell studie genomfördes. Mätningarna som utfördes var tonaudiometri och ASSR, den senare uppmättes med Interacoustics Eclipse och GSI Audera på (n=20) vuxna med normal hörsel och (n=4) vuxna med hörselnedsättning.

För personer med normal hörsel påvisades en god överensstämmelse mellan estimerade ASSR-värden och tonaudiometri för Interacoustics Eclipse, något sämre överensstämmelse för GSI Audera. Genomsnittlig mättid för båda instrumenten var ca 40 min. Resultaten visade att elektrodplaceringen inte har någon påverkan på ASSR-värden för Interacoustics Eclipse. Hälften av försökspersonerna upplevde att Interacoustics Eclipse hade ett behagligare ljudstimuli att slappna av till och den andra hälften upplevde GSI Audera som behagligast. De estimerade ASSR-värdena påverkades minimalt beroende på om mättillfället påbörjades eller avslutades med Interacoustics Eclipse.

 

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O projeto de doutorado tem como objetivo estudo e montagem de um sistema laser que gere feixe laser de comprimento de onda sintonizável continuamente, com intervalo espectral na região infravermelho (IV) próximo e médio. O trabalho foi dividido em três partes: (i) laser de Nd:YAG @1064nm, (ii) aplicação deste sobre uma cavidade ressonante OPO e (iii) simulação de cavidades laser em anel. O laser de Nd:YAG foi montado e aprimorado a partir de outro laser desenvolvido anteriormente, o qual foi transformado em fonte polarizada pela inserção de um elemento óptico no seu interior. Em comparação com o laser não polarizado, ele apresentou potência de saída com valores relativamente altos, com um máximo de 30W, e melhora do fator de qualidade do feixe de M2<1,3 mais próximo do valor ideal igual a 1 e assim próximo do modo TEM00, adequado para aplicações de transferência de energia. A aplicação do laser Nd:YAG polarizado sobre uma cavidade OPO linear (meio ativo: cristal de Niobato de Lítio dopado 5%MgO:LiNbO3 com alternância de polarização, conhecido pela sigla PPLN) foi bem sucedida, por ter sido observado seu funcionamento pela geração em seu meio ativo dos feixes (λS, λC) sinal e complementar sintonizados continuamente, mostrando que valores de potência e fator de qualidade foram adequados e suficientes para ser testado em um OPO. Foi mensurada na saída potencia de 1W para o feixe complementar, onde a eficiência de inclinação da curva mostrou valores de 20,8% e 23,4% para bombeio pulsado (temperaturas do cristal TC=100°C/150°C), e o valor de 11,1% (TC=150°C) para bombeio contínuo. A aplicação da técnica knife-edge no feixe complementar (TC=150°C/rede periódica do cristal Λ0=31,59m/ λC=2470nm) resultou em fator de qualidade do feixe de M2=5,75(165). Foi realizada simulação numérica, visando estudo e planejamento de duas cavidades em anel simétricas, com sintonização contínua dos feixes de interesse na saída. A primeira contém um cristal PPLN como meio ativo, onde ocorre Oscilação Paramétrica, gerando feixe na região espectral do IV médio. A segunda cavidade possui dois cristais, que são PPLN e Triborato de Lítio (LiB3O5 conhecido pela sigla LBO), onde ocorrem na ordem Oscilação Paramétrica e Geração de Segundo Harmônico, gerando feixe na região espectral entre visível e IV próximo. Foram obtidos dois conjuntos de valores de dimensões para as cavidades, usando base teórica e condições de contorno apropriadas ao realizar os cálculos necessários, fixadas as informações sobre os respectivos componentes ópticos, onde o feixe de bombeio @1064nm focalizado no centro do cristal PPLN possui valor de cintura de feixe pouco maior que 50 μm. O laser de Nd:YAG @1064nm polarizado desenvolvido possui montagem simples e custo baixo de seus componentes, reduzindo o custo do sistema laser final onde foi aplicado, comparado com outros sistemas laser sintonizáveis. Deseja-se estudar o desenvolvimento destes para um modelo de frequência única, usando-o como fonte de bombeio para geração de feixes com largura de linha estreita, visando aplicação em espectroscopia.
Tese (Doutorado em Tecnologia Nuclear)
IPEN/T
Instituto de Pesquisas Energéticas e Nucleares - IPEN-CNEN/SP

Oro är ett allmänmänskligt fenomen som kan vara både till nytta och skada för oss. Syftet med denna studie var att undersöka om det finns någon skillnad mellan högoroare respektive lågoroare vad gäller vilken funktion oron fyller (Worry Automatic Thought Questionnaire) och orosinnehåll (Student Worry Scale), undersöka eventuella könsskillnader samt jämföra ett mått på frekvens och intensitet i den allmänna oron (Penn State Worry Questionnaire) med ett allmänt ångestmått (Beck Anxiety Inventory). Undersökningsdeltagarna utgjordes av 40 psykologistudenter och 70 polisstudenter och könsfördelningen var jämn. Signifikant samband mellan totalpoäng på PSWQ och totalpoäng på BAI erhölls. Högoroare oroade sig signifikant mer av vidskepliga skäl, för att undvika eller förhindra något ont från att hända, i förberedande syfte, för att få motivation samt som distraktion från mer emotionella saker, jämfört med lågoroare. De oroade sig signifikant mer än lågoroare över akademiska krav, arbetet, personliga relationer och vad andra tycker om dem. Högoroande kvinnor oroade sig signifikant mer än högoroande män över hälsoaspekter och vad andra tycker om dem. Lågoroande kvinnor oroade sig signifikant mer än lågoroande män över akademiska krav. Avsaknaden av flera signifikanta könsskillnader tros delvis bero på för få undersökningsdeltagare.

Le traitement de l'information quantique, en particulier celui utilisant les centres colorés du diamant et la manipulation cohérente des ions de terre rare incorporés dans des matrices solides (Pr3+, Eu3+) et la spectroscopie à ultra-haute résolution, nécessitent des sources accordables ayant une faible largeur de raie. Or, dans la gamme rouge-orange (570-635 nm) où les diodes lasers font défaut et les lasers solides restent très peu développés, les lasers à colorants sont actuellement les seules sources de rayonnement cohérent disponibles. En revanche, ce type de laser est assez complexe et difficile à stabiliser au niveau du kHz à cause des bruits à haute fréquence générés par le jet de colorant.Pour répondre aux besoins des expériences citées ci-dessus, cette thèse vise à proposer une alternative "tout solide" aux lasers à colorants en explorant différentes possibilités pour la construction d'une source stable émettant dans l'orange-rouge. Dans ce but, nous avons proposé deux solutions:1. La première consiste à développer des oscillateurs paramétriques optiques. Dans cette voie, nous avons développé un OPO simplement résonant à doublage de fréquence intra-cavité et stabilisé en frequence au niveau du kHz.2. La deuxième consiste en un laser à base de fluorures dopés au Pr3+pompé par diode.

In der vorliegenden Arbeit wird erstmals das QQDS-Magnetspektrometer für die höchstauflösende Ionenstrahlanalytik leichter Elemente am Helmholtz-Zentrum Dresden-Rossendorf umfassend vorgestellt. Zusätzlich werden sowohl alle auf die Analytik Einfluss nehmenden Parameter untersucht als auch Methoden und Modelle vorgestellt, wie deren Einfluss vermieden oder rechnerisch kompensiert werden kann. Die Schwerpunkte dieser Arbeit gliedern sich in fünf Bereiche. Der Erste ist der Aufbau und die Inbetriebnahme des QQDS-Magnetspektrometers, der zugehörige Streukammer mit allen Peripheriegeräten und des eigens für die höchstauflösende elastische Rückstoßanalyse entwickelten Detektors. Sowohl das umgebaute Spektrometer als auch der im Rahmen dieser Arbeit gebaute Detektor wurden speziell an experimentelle Bedingungen für die höchstauflösende Ionenstrahlanalytik leichter Elemente angepasst und erstmalig auf einen routinemäßigen Einsatz hin getestet. Der Detektor besteht aus zwei Komponenten. Zum einen befindet sich am hinteren Ende des Detektors eine Bragg-Ionisationskammer, die zur Teilchenidentifikation genutzt wird. Zum anderen dient ein Proportionalzähler, der eine Hochwiderstandsanode besitzt und direkt hinter dem Eintrittsfenster montiert ist, zur Teilchenpositionsbestimmung im Detektor. Die folgenden zwei Schwerpunkte beinhalten grundlegende Untersuchungen zur Ionen-Festkörper-Wechselwirkung. Durch die Verwendung eines Magnetspektrometers ist die Messung der Ladungszustandsverteilung der herausgestreuten Teilchen direkt nach einem binären Stoß sowohl möglich als auch für die Analyse notwendig. Aus diesem Grund werden zum einen die Ladungszustände gemessen und zum anderen mit existierenden Modellen verglichen. Außerdem wird ein eigens entwickeltes Modell vorgestellt und erstmals im Rahmen dieser Arbeit angewendet, welches den ladungszustandsabhängigen Energieverlust bei der Tiefenprofilierung berücksichtigt. Es wird gezeigt, dass ohne die Anwendung dieses Modells die Tiefenprofile nicht mit den quantitativen Messungen mittels konventioneller Ionenstrahlanalytikmethoden und mit der Dickenmessung mittels Transmissionselektronenmikroskopie übereinstimmen, und damit falsche Werte liefern würden. Der zweite für die Thematik wesentliche Aspekt der Ionen-Festkörper-Wechselwirkung, sind die Probenschäden und -modifikationen, die während einer Schwerionen-bestrahlung auftreten. Dabei wird gezeigt, dass bei den hier verwendeten Energien sowohl elektronisches Sputtern als auch elektronisch verursachtes Grenzflächendurchmischen eintreten. Das elektronische Sputtern kann durch geeignete Strahlparameter für die meisten Proben ausreichend minimiert werden. Dagegen ist der Einfluss der Grenzflächendurchmischung meist signifikant, so dass dieser analysiert und in der Auswertung berücksichtigt werden muss. Schlussfolgernd aus diesen Untersuchungen ergibt sich für die höchstauflösende Ionenstrahlanalytik leichter Elemente am Rossendorfer 5-MV Tandembeschleuniger, dass die geeignetsten Primärionen Chlor mit einer Energie von 20 MeV sind. In Einzelfällen, wie zum Beispiel der Analyse von Bor, muss die Energie jedoch auf 6,5 MeV reduziert werden, um das elektronische Sputtern bei der notwendigen Fluenz unterhalb der Nachweisgrenze zu halten. Der vierte Schwerpunkt ist die Untersuchung von sowohl qualitativen als auch quantitativen Einflüssen bestimmter Probeneigenschaften, wie beispielsweise Oberflächenrauheit, auf die Form des gemessenen Energiespektrums beziehungsweise auf das analysierte Tiefenprofil. Die Kenntnis der Rauheit einer Probe an der Oberfläche und an den Grenzflächen ist für die Analytik unabdingbar. Als Resultat der genannten Betrachtungen werden die Einflüsse von Probeneigenschaften und Ionen-Festkörper-Wechselwirkungen auf die Energie- beziehungsweise Tiefenauflösung des Gesamtsystems beschrieben, berechnet und mit der konventionellen Ionenstrahlanalytik verglichen. Die Möglichkeiten der höchstauflösenden Ionenstrahlanalytik werden zudem mit den von anderen Gruppen veröffentlichten Komplementärmethoden gegenübergestellt. Der fünfte und letzte Schwerpunkt ist die Analytik leichter Elemente in ultradünnen Schichten unter Berücksichtigung aller in dieser Arbeit vorgestellten Modelle, wie die Reduzierung des Einflusses von Strahlschäden oder die Quantifizierung der Elemente im dynamischen Ladungszustandsnichtgleichgewicht. Es wird die Tiefenprofilierung von Mehrschichtsystemen, bestehend aus SiO2-Si3N4Ox-SiO2 auf Silizium, von Ultra-Shallow-Junction Bor-Implantationsprofilen und von ultradünnen Oxidschichten, wie zum Beispiel High-k-Materialien, demonstriert
In this thesis the QQDS magnetic spectrometer that is used for high resolution ion beam analysis (IBA) of light elements at the Helmholtz-Zentrum Dresden-Rossendorf is presented for the first time. In addition all parameters are investigated that influence the analysis. Methods and models are presented with which the effects can be minimised or calculated. There are five focal points of this thesis. The first point is the construction and commissioning of the QQDS magnetic spectrometer, the corresponding scattering chamber with all the peripherals and the detector, which is specially developed for high resolution elastic recoil detection. Both the reconstructed spectrometer and the detector were adapted to the specific experimental conditions needed for high-resolution Ion beam analysis of light elements and tested for routine practice. The detector consists of two compo-nents. At the back end of the detector a Bragg ionization chamber is mounted, which is used for the particle identification. At the front end, directly behind the entrance window a proportional counter is mounted. This proportional counter includes a high-resistance anode. Thus, the position of the particles is determined in the detector. The following two points concern fundamental studies of ion-solid interaction. By using a magnetic spectrometer the charge state distribution of the particles scattered from the sample after a binary collision is both possible and necessary for the analysis. For this reason the charge states are measured and compared with existing models. In addition, a model is developed that takes into account the charge state dependent energy loss. It is shown that without the application of this model the depth profiles do not correspond with the quantitative measurements by conventional IBA methods and with the thickness obtained by transmission electron microscopy. The second fundamental ion-solid interaction is the damage and the modification of the sample that occurs during heavy ion irradiation. It is shown that the used energies occur both electronic sputtering and electronically induced interface mixing. Electronic sputtering is minimised by using optimised beam parameters. For most samples the effect is below the detection limit for a fluence sufficient for the analysis. However, the influence of interface mixing is so strong that it has to be included in the analysis of the layers of the depth profiles. It is concluded from these studies that at the Rossendorf 5 MV tandem accelerator chlorine ions with an energy of 20 MeV deliver the best results. In some cases, such as the analysis of boron, the energy must be reduced to 6.5 MeV in order to retain the electronic sputtering below the detection limit. The fourth focus is the study of the influence of specific sample properties, such as surface roughness, on the shape of a measured energy spectra and respectively on the analysed depth profile. It is shown that knowledge of the roughness of a sample at the surface and at the interfaces for the analysis is needed. In addition, the contribution parameters limiting the depth resolution are calculated and compared with the conventional ion beam analysis. Finally, a comparison is made between the high-resolution ion beam analysis and complementary methods published by other research groups. The fifth and last focus is the analysis of light elements in ultra thin layers. All models presented in this thesis to reduce the influence of beam damage are taken into account. The dynamic non-equilibrium charge state is also included for the quantification of elements. Depth profiling of multilayer systems is demonstrated for systems consisting of SiO2-Si3N4Ox-SiO2 on silicon, boron implantation profiles for ultra shallow junctions and ultra thin oxide layers, such as used as high-k materials

Education plays prominent role in the development of nations considering that the progress of nations depends on the capability of its workforce which is informed by the quality of education offered its citizenry. Program for international students‟ assessment revealed the need to improve upon the quality of education across nations. This need was corroborated by the unimpressive performance of the secondary schools learners in Egbeda local Government of Oyo State. Ironically, secondary schools management in the local government have been found to have very little discretionary powers in the administration of their schools – a situation that could have contributed to the poor performance of the learners. The study thus focussed on the effect of school autonomy on learners‟ performance in Egbeda Local Government secondary schools of Oyo State, Nigeria. Cross-sectional survey research design was adopted for the study. The population comprised 72 Principals, 158 Vice Principals and 125 Heads of Departments from the 72 schools covered by the study. Thirty schools were excluded from the study for not meeting selection criteria of ten years of establishment. Sample size of 355 was purposively selected for the study. Response rate was 97.7%. Data were analysed using descriptive and inferential statistics. Findings revealed that school autonomy dimensions have statistically significant effect on learners‟ work quality (F5, 341 = 221.357, Adj. R2 = 0.761, p < 0.05); school autonomy dimensions have statistically significant effect on learners‟ affective performance (F5, 341 = 66.085, Adj. R2 = 0.492, p < 0.05); school autonomy dimensions have statistically significant effect on learners‟ character formation (F5, 341 = 553.982, Adj. R2 = 0.889, p < 0.05); school autonomy dimensions have statistically significant effect on learners‟ personal development (F5, 341 = 104.177, Adj. R2 = 0.599, p < 0.05); school autonomy dimensions have statistically significant effect on learners‟ social development (F5, 341 = 45.928, Adj. R2 = 0.394, p < 0.05). The study concluded that school autonomy affected learners‟ performance. The study recommended that education authorities should make policy provisions that will enhance school autonomy in both private and public secondary schools in the Egbeda Local Government of Oyo State to improve learners‟ performance.
Educational Management and Leadership
Ph. D. (Education Management)

This thesis is an attempt to fill the gap in our knowledge about rural poverty and what it means to be poor. It has grown out of concerns that a lot has been said and written about poverty, yet poor people’s own understanding of their poverty is hardly ever included in policy and programs designed to reduce poverty. The rural poor are particularly marginalised in terms of voice as they are often represented by mere statistical figures. (For complete abstract open document)

A research report submitted to the Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, in partial fulfillment of the requirements for the degree of Masters in Epidemiology (Implementation Science) Johannesburg, November 2017.
Performance management (PM) has been shown to improve organisational performance and tuberculosis case detection rate. Despite the utilisation of PM within the tuberculosis and leprosy control programme (TBLCP) in Nigeria, the country’s tuberculosis case detection rate is amongst the poorest globally. This research therefore aimed to examine the fidelity with which PM is being implemented within the TBLCP. A mixed method approach was adopted, where quantitative questionnaires and semi-structured interviews were conducted. Quantitative data was primarily analysed using summary statistics and differences were assessed using the Wilcoxon Sign Rank test. Thematic analysis of the qualitative data was done. TBLCP staffs are responsive to PM but adherence is poor in the standards setting and implementation component of the PM system. The major reasons for the identified gaps were lack of local stakeholder involvement, lack of budget implementation and inadequate human resources. Implementation strategies need to be developed to address the gaps in the early stages of the PM process. If the identified gaps can be bridged, PM implementation will be optimised.
LG2018

Given the general poor state of health care and the devastating effect of user fee, the National Health Insurance Scheme (NHIS) was instituted as a health financing policy with the main purpose to ensure universal access for all Nigerians. However, since NHIS became operational in 2005, only members of scheme are able to access health care both in the public and in private sectors, representing about 3% of Nigerian population. The thesis therefore examines the design and implementation policy of NHIS in Oyo state, Nigeria. Key design issues conceptual framework guides the analysis of data. The framework identifies three health interrelated financing functions namely revenue collection, risk pooling and purchasing. Data was collected from the NHIS officials, employees of the Health Maintenance Organisations (HMOs) and the Health Care Providers (HCPs) using key informant interview. In addition, in-depth interview and semi structure questionnaire were used to gather data from the enrolees and the nonenrolees. Empirical findings show that NHIS is fragmented given the existence of several programmes. In addition, there is no risk pooling neither redistribution of funds in the scheme. Revenue generated through contributions from the enrolees was not sufficient to fund health care services received by the beneficiaries because of the small percentage of the Nigerian population that the scheme covers. Further findings indicate that enrolled federal civil servants have not commenced monthly contribution to the NHIS. They pay 10% as co-pay in every consultation while federal government as an employer subsidised by 90%. Majority (76.8%) of the respondents agreed that they were financially protected from catastrophic spending. However, the overall benefit package was rated moderate because of exclusion of some priority and essential health care needs. Although above half (57%) of the respondents concurred that HMOs are accessible, in the overall, (47.6%) of the respondents were not satisfied with their services. In the case of the HCPs, majority (61.9%) of the respondents claimed that there is no excessive waiting time for consultation. Furthermore, (64.3%) rated their interpersonal relationship with the HCPs to be good. However, more than half of the respondents (54%) disagreed on availability of prescribed drugs in NHIS accredited health facilities. For the nonenrolees, findings show that most of the respondents (72.9%) were willing to enrol, but significant proportion (47.5%) indicated financial constraint as impediment to enrolment.
Sociology
D. Phil. (Sociology)

This research examined the reasons for the differences in the academic performance of school learners, and makes reference to economic, social and cultural capital theory in explaining educational imbalances in society. Many researchers have conducted studies on the factors contributing to the academic performance of learners at various levels of schooling have been undertaken. These researchers have come to the conclusion that the academic performance of learners is affected by numerous factors, namely, gender, age, learners' schooling, family’s socio-economic status, residential area of learners, the medium of instruction in schools, tuition trends, hours spent on studying on a daily basis and accommodation in hostels (Petersen, 2010:15). There is a popular saying in south-western Nigeria, that “if the parents’ financial status is good, the reflection of it will show in the child”. This study is focused on the academic performance of learners at the secondary school level and investigates the influence of economic, social and cultural capital on their academic performance. This study aims to determine which factors contribute to the poor academic performance of rural secondary school learners in south-western Nigeria and then, based on the findings of the research undertaken to make recommendations regarding what could be done to improve the academic performance of these learners. The mixed-methods approach of combining both qualitative and quantitative approaches to accomplish the aims of the research were used. The population consisted of four secondary schools, four school principals, 16 teachers, 40 parents and 120 learners. According to the results of this research, we can see that the social, cultural and economic capital of parents is a powerful determinant with regard to motivating their children’s education.
Educational Studies
D. Ed. (Socio-Education)

Extreme poverty is the most devastating problem facing the human race, because it condemns nearly half of the world‘s population to hunger, disease and oppression-often with little or no hope for the future. The human beings made in the image of God are tragically prevented from realizing their God given potentials because of poverty. The reality of poverty can be overwhelming, but we must understand that this age old adversary can be defeated. According to the famous maxim ―If you give a man a fish, he will eat for a day, but if you teach a man how to fish, he will eat for a lifetime‖. Therefore, the best way to fight poverty is to empower the people to shape their own future-to treat the causes of poverty and not just the symptoms (Stearns: 2010, 300) Key
Christian Spirituality, Church History & Missiology
D. Th. (Missiology)

In the absence of a cure and/or vaccine, the best approach to HIV is to focus on prevention. However, preventative measures that are presently available in Nigeria do not target persons with intellectual disability despite their vulnerability to HIV infection. This study sought to compare the HIV knowledge, attitudes, and sexual practices of mildly/moderately intellectually impaired learners (IIL) and mainstream learners (ML) in Nigeria; to explore the contextual factors informing these, as well as both groups‗ exposure to HIV education. It also tested the relevance of the I-Change Model in predicting sexual abstinence among learners with intellectual disability. Findings can assist in developing tailored HIV prevention education for Nigerian learners with intellectual impairment. This cross-sectional, comparative study utilised mixed methods to investigate HIV knowledge, attitudes, and sexual practices among mildly/moderately IIL and ML in Nigeria. Mildly/moderately IIL (300) and ML (300) within the age range of 12-19 years in special and regular schools completed a questionnaire based on the I-Change Model. Focus group discussions and in-depth interviews were used with learners to explore contextual factors informing their HIV knowledge, risk perception, sexual behaviours and access to HIV education and services. Key informant interviews were used as independent sources of the same information with their teachers. Learners with intellectual impairment were less aware of HIV/AIDS than their non-disabled peers (p < 0.001), had lower HIV knowledge scores (p < 0.001) and lower HIV risk perception scores (p < 0.001). Sexual experience was reported by 79 (26.3%) of the IIL sample compared to 48 (16.0%) of the ML sample (p = 0.002). Girls with intellectual disability were 3.71 times more likely to report a history of sexual abuse than non-disabled girls (p = 0.041). Inconsistent condom use with casual partners (p < 0.001) and non-use of condoms during the last sexual activity (p < 0.001) was higher in IIL. The I-Change Model was most effective in predicting sexual abstinence among IIL, particularly regarding factors related to motivation and intention. Intellectually impaired learners were more vulnerable to HIV infection due to neglect, poverty, sexual abuse/exploitation, stigmatisation, pressure from non-disabled peers, denial of HIV education, and inaccessible HIV-related services. Teachers only provided them with sexuality and HIV education when sexual activity was suspected and/or from age 18. The content of such education comprised mainly warnings, misinformation and corporal punishment to instil fear and desexualise them. Thus, this group of learners was limited in the way they experienced and expressed their sexuality. Unlike with their non-disabled peers, teachers attributed sexual activity among IIL solely to natural urges without emotional involvement. Contrary to teachers‘ opinions, some IIL were involved in symbiotic, loving relationships with their II peers. In addition, those that were not yet in such relationships expressed the desire to find non-discriminatory partners in the future. They explored their sexuality through intimate relationships, sexual intercourse, peeping at the opposite sex, pornography, and masturbation. Condoms were less available to IIL than ML, and they lacked the self-efficacy to use them. They were also less available to II girls than II boys. Female learners with intellectual impairment often had older sexual partners due to sexual abuse/exploitation, unlike their non-disabled peers, who embarked on such relationships for financial/material gains. The findings of this study indicated that IIL were sexual beings, just like their non-disabled peers, and at higher risk of HIV infection than the latter. Stigma and discrimination are the root causes of all the disadvantages/barriers that IIL experience in accessing HIV information, education and related services. Therefore, there is the need to put stigma reduction strategies in HIV response to safeguard the health of IIL. In addition, there is a need for the development of a gender-sensitive, tailored sexuality and HIV/AIDS educational format for learners with intellectual disability in Nigeria.
Thesis (Ph.D.)-University of KwaZulu-Natal, Durban, 2011.

Many Christian faith-based preschools in the Oyo State of Nigeria are realising that spiritual development is an essential part of young children’s natural growth and should be given due attention. Accordingly, activities at preschools should be geared to support young children’s spiritual development. In conjunction with the administrators, the preschool teachers at Christian faith-based schools are charged with the responsibility of attending to the spiritual development of young children in their care. This research study examined factors affecting the spiritual development of young children in the Oyo State of Nigeria by employing a qualitative method with phenomenological research design. The research highlighted realities via developmental theories regarding the spiritual development of young children; government’s stand on the spiritual development of young children; how spiritual development of young children is facilitated in an early childhood setting; the benefits of spiritual development during early childhood; and the implications of spiritual development for practice in the Oyo State of Nigeria. Data were gathered through semi-structured interviews, observation of practices and document analyses of the records of four preschools. All were purposefully selected, including the twenty teachers and four administrators. The results of the research revealed that all the pre-school teachers who showed interest in fostering spirituality in young children should gain experience, understanding and training in best practices. It was also found that although the Nigerian government has policies and curricula for early childhood education (ECE), these do not include spirituality or faith-based teaching. Further, to exacerbate the situation, the government does not monitor and evaluate the implementation of policies and ECE curricula. This study discovered that preschool teachers have a general understanding of how to enhance the spiritual development of young children by drawing on their own (i.e. the preschool teachers’) personal spiritual development processes, which should be complemented by formal training. The benefits of spiritual development in young children include the inculcation of sound moral values, feelings of joy, academic excellence, unity and development in the community, the development of committed future leaders and the promotion of national peace. The research study recommends that the government of Nigeria intervene in early childhood education by providing financial support and formal training for preschool teachers in the area of spiritual development of young children and by motivating administrators and preschool teachers to be more cooperative and creative in including spiritual development in their school’s curriculum.
Early Childhood Education

In der vorliegenden Arbeit wird erstmals das QQDS-Magnetspektrometer für die höchstauflösende Ionenstrahlanalytik leichter Elemente am Helmholtz-Zentrum Dresden-Rossendorf umfassend vorgestellt. Zusätzlich werden sowohl alle auf die Analytik Einfluss nehmenden Parameter untersucht als auch Methoden und Modelle vorgestellt, wie deren Einfluss vermieden oder rechnerisch kompensiert werden kann. Die Schwerpunkte dieser Arbeit gliedern sich in fünf Bereiche. Der Erste ist der Aufbau und die Inbetriebnahme des QQDS-Magnetspektrometers, der zugehörige Streukammer mit allen Peripheriegeräten und des eigens für die höchstauflösende elastische Rückstoßanalyse entwickelten Detektors. Sowohl das umgebaute Spektrometer als auch der im Rahmen dieser Arbeit gebaute Detektor wurden speziell an experimentelle Bedingungen für die höchstauflösende Ionenstrahlanalytik leichter Elemente angepasst und erstmalig auf einen routinemäßigen Einsatz hin getestet. Der Detektor besteht aus zwei Komponenten. Zum einen befindet sich am hinteren Ende des Detektors eine Bragg-Ionisationskammer, die zur Teilchenidentifikation genutzt wird. Zum anderen dient ein Proportionalzähler, der eine Hochwiderstandsanode besitzt und direkt hinter dem Eintrittsfenster montiert ist, zur Teilchenpositionsbestimmung im Detektor. Die folgenden zwei Schwerpunkte beinhalten grundlegende Untersuchungen zur Ionen-Festkörper-Wechselwirkung. Durch die Verwendung eines Magnetspektrometers ist die Messung der Ladungszustandsverteilung der herausgestreuten Teilchen direkt nach einem binären Stoß sowohl möglich als auch für die Analyse notwendig. Aus diesem Grund werden zum einen die Ladungszustände gemessen und zum anderen mit existierenden Modellen verglichen. Außerdem wird ein eigens entwickeltes Modell vorgestellt und erstmals im Rahmen dieser Arbeit angewendet, welches den ladungszustandsabhängigen Energieverlust bei der Tiefenprofilierung berücksichtigt. Es wird gezeigt, dass ohne die Anwendung dieses Modells die Tiefenprofile nicht mit den quantitativen Messungen mittels konventioneller Ionenstrahlanalytikmethoden und mit der Dickenmessung mittels Transmissionselektronenmikroskopie übereinstimmen, und damit falsche Werte liefern würden. Der zweite für die Thematik wesentliche Aspekt der Ionen-Festkörper-Wechselwirkung, sind die Probenschäden und -modifikationen, die während einer Schwerionen-bestrahlung auftreten. Dabei wird gezeigt, dass bei den hier verwendeten Energien sowohl elektronisches Sputtern als auch elektronisch verursachtes Grenzflächendurchmischen eintreten. Das elektronische Sputtern kann durch geeignete Strahlparameter für die meisten Proben ausreichend minimiert werden. Dagegen ist der Einfluss der Grenzflächendurchmischung meist signifikant, so dass dieser analysiert und in der Auswertung berücksichtigt werden muss. Schlussfolgernd aus diesen Untersuchungen ergibt sich für die höchstauflösende Ionenstrahlanalytik leichter Elemente am Rossendorfer 5-MV Tandembeschleuniger, dass die geeignetsten Primärionen Chlor mit einer Energie von 20 MeV sind. In Einzelfällen, wie zum Beispiel der Analyse von Bor, muss die Energie jedoch auf 6,5 MeV reduziert werden, um das elektronische Sputtern bei der notwendigen Fluenz unterhalb der Nachweisgrenze zu halten. Der vierte Schwerpunkt ist die Untersuchung von sowohl qualitativen als auch quantitativen Einflüssen bestimmter Probeneigenschaften, wie beispielsweise Oberflächenrauheit, auf die Form des gemessenen Energiespektrums beziehungsweise auf das analysierte Tiefenprofil. Die Kenntnis der Rauheit einer Probe an der Oberfläche und an den Grenzflächen ist für die Analytik unabdingbar. Als Resultat der genannten Betrachtungen werden die Einflüsse von Probeneigenschaften und Ionen-Festkörper-Wechselwirkungen auf die Energie- beziehungsweise Tiefenauflösung des Gesamtsystems beschrieben, berechnet und mit der konventionellen Ionenstrahlanalytik verglichen. Die Möglichkeiten der höchstauflösenden Ionenstrahlanalytik werden zudem mit den von anderen Gruppen veröffentlichten Komplementärmethoden gegenübergestellt. Der fünfte und letzte Schwerpunkt ist die Analytik leichter Elemente in ultradünnen Schichten unter Berücksichtigung aller in dieser Arbeit vorgestellten Modelle, wie die Reduzierung des Einflusses von Strahlschäden oder die Quantifizierung der Elemente im dynamischen Ladungszustandsnichtgleichgewicht. Es wird die Tiefenprofilierung von Mehrschichtsystemen, bestehend aus SiO2-Si3N4Ox-SiO2 auf Silizium, von Ultra-Shallow-Junction Bor-Implantationsprofilen und von ultradünnen Oxidschichten, wie zum Beispiel High-k-Materialien, demonstriert.
In this thesis the QQDS magnetic spectrometer that is used for high resolution ion beam analysis (IBA) of light elements at the Helmholtz-Zentrum Dresden-Rossendorf is presented for the first time. In addition all parameters are investigated that influence the analysis. Methods and models are presented with which the effects can be minimised or calculated. There are five focal points of this thesis. The first point is the construction and commissioning of the QQDS magnetic spectrometer, the corresponding scattering chamber with all the peripherals and the detector, which is specially developed for high resolution elastic recoil detection. Both the reconstructed spectrometer and the detector were adapted to the specific experimental conditions needed for high-resolution Ion beam analysis of light elements and tested for routine practice. The detector consists of two compo-nents. At the back end of the detector a Bragg ionization chamber is mounted, which is used for the particle identification. At the front end, directly behind the entrance window a proportional counter is mounted. This proportional counter includes a high-resistance anode. Thus, the position of the particles is determined in the detector. The following two points concern fundamental studies of ion-solid interaction. By using a magnetic spectrometer the charge state distribution of the particles scattered from the sample after a binary collision is both possible and necessary for the analysis. For this reason the charge states are measured and compared with existing models. In addition, a model is developed that takes into account the charge state dependent energy loss. It is shown that without the application of this model the depth profiles do not correspond with the quantitative measurements by conventional IBA methods and with the thickness obtained by transmission electron microscopy. The second fundamental ion-solid interaction is the damage and the modification of the sample that occurs during heavy ion irradiation. It is shown that the used energies occur both electronic sputtering and electronically induced interface mixing. Electronic sputtering is minimised by using optimised beam parameters. For most samples the effect is below the detection limit for a fluence sufficient for the analysis. However, the influence of interface mixing is so strong that it has to be included in the analysis of the layers of the depth profiles. It is concluded from these studies that at the Rossendorf 5 MV tandem accelerator chlorine ions with an energy of 20 MeV deliver the best results. In some cases, such as the analysis of boron, the energy must be reduced to 6.5 MeV in order to retain the electronic sputtering below the detection limit. The fourth focus is the study of the influence of specific sample properties, such as surface roughness, on the shape of a measured energy spectra and respectively on the analysed depth profile. It is shown that knowledge of the roughness of a sample at the surface and at the interfaces for the analysis is needed. In addition, the contribution parameters limiting the depth resolution are calculated and compared with the conventional ion beam analysis. Finally, a comparison is made between the high-resolution ion beam analysis and complementary methods published by other research groups. The fifth and last focus is the analysis of light elements in ultra thin layers. All models presented in this thesis to reduce the influence of beam damage are taken into account. The dynamic non-equilibrium charge state is also included for the quantification of elements. Depth profiling of multilayer systems is demonstrated for systems consisting of SiO2-Si3N4Ox-SiO2 on silicon, boron implantation profiles for ultra shallow junctions and ultra thin oxide layers, such as used as high-k materials.