Univ., Diss.--Gießen, 2003.

Text in English / The study investigated the usage of Open Access Institutional Repositories (OAIR) in university libraries in Ghana to develop a strategy on how the usage of OAIR in university libraries in Ghana may be enhanced. The study adopted the Technology Acceptance Model (TAM), which was then modified to fit the study. Accessibility, availability and visibility were proposed in addition to the conventional variables of TAM to improve the fit between the data and the theoretical model. Pragmatism paradigm, mixed methods research approach and convergent parallel mixed method design (survey and case study designs) was used for the study. Simple random sampling, stratified random sampling, purposive sampling techniques and the sample size converter were the sampling procedures and methods employed. A total of nine hundred and ninety-eight (998) respondents completed the questionnaires distributed, but for the qualitative phase twelve (12) OAIR managers were purposively selected. The questionnaire and interview guide were used as research instruments to gather relevant data for the study. Descriptive statistics (frequencies, percentages, means and standard deviation) and inferential statistics (multinomial logistic regression and CFA using SEM) were used as statistical tools to analyse quantitative data and thematic analysis was used to analyse qualitative data. The study revealed that there was a low level of OAIR usage in universities among academic staff, notwithstanding the high level of understanding of OAIR. This was evident in the number of research work uploaded onto the OAIR by the OAIR team. Inadequate advocacy, ICT connectivity, infrastructure, funding, power supply, insufficient technological skills, institutional repository policy, absence of incentives, institutional culture and politics and copyright issues were the challenges facing the usage of OAIR in university libraries in Ghana. The study concluded that advocacy, policies, software and staffing enshrined in an institutional guideline on OAIR would enhance OAIR usage. The study developed an OAIR Usage Model and OAIR User Manual, which would be very instrumental in the usage of OAIR in university libraries in Ghana. The model will enhance user satisfaction and intention to reuse the OAIR and making OAIR research outputs available, accessible and visible. The manual specifies the contents and documentsaccepted by the OAIR and ensuring the quality of documents archived. / Information Science / D. Litt. et Phil. (Information Science)

Bibliography: pages 170-189 / Relational discipleship is found to hold a great potential for church growth. The Methodist Church Ghana uses Small Groups, referred to in the Methodist tradition as the Bible Class as effective tool for relational discipleship for church growth. Bible Class has been used from the inception of the church for exponential growth of the church. However, the rate of growth in recent years have been below targets. This study explored the factors affecting the positive outcomes of the utilization of the Bible Class meetings as effective tool for relational discipleship and for church growth. This study explored the participants’ knowledge and use of the structural arrangements put in place to help pastors and leaders to foster relational discipleship towards church growth (the numerical and spiritual growth and commitment of the church members); and the leadership and discipleship styles employed by the pastors and class leaders in pursuance of the goal of the church. Five (5) Societies in the Accra Diocese of the Methodist Church Ghana located in Accra, the capital city of Ghana, were involved in the study. Mixed Method Research that combined both qualitative (in-depth interviews and Focus Groups) and quantitative (structured questionnaires) research methodologies were used to explore the perspectives about the structural arrangements put in place to help pastors and leaders to foster relational discipleship, leadership/discipleship styles of the leaders; the benefit and usefulness of the Bible Class as a relational discipleship tool; their participation in church programmes and activities and the challenges they faced. The qualitative research consisted of 20 in-depth interviews and eight (8) focus groups with some church members, ministers and church leaders. The focus group discussions revealed that church members knew about the structural arrangements put in place to assist leadership of the church to foster closer relationship with their members in pursuance of discipleship. The study also revealed there were many challenges associated with the participation in the Bible Class Meetings and other church programmes and activities. The Bible Class meeting was cited as having been put in place for discipleship making and could be used to strengthen relationship between the church leadership and members. The findings from the qualitative phase were tested at the quantitative stage. The quantitative research method employed structured questionnaires administered to 650 church members, ministers and church leaders. The participants comprised 419 (64%) females and 231 (36%) males. Their ages ranged between 18 and 79 years with the majority (55%) between 18 and 40 years. The participants completed the questionnaires by themselves at the premises of their churches. The response rate was 100%. Three hypotheses were tested. The findings of the research suggest that the extent to which pastors and church leadership directly get involved in the affairs of their members with the view to making disciples and monitoring their spiritual growth influences church members’ interest in church activities and commitment to the church. It was also noted that leadership’s participation in church activities encourages members’ participation in church activities and programmes. Similarly, pastors and lay leaders who utilized the Bible Class or Small Group to build relationships with their members had greater numbers of members attending small group meetings and that pastors’ involvement makes the church members perceive class meeting as beneficial. However, only Interpersonal Leadership Style of Discipleship was positively associated with knowledge about church activities and participation in church activities and programmes. The more members know about Church activities, the greater their participation in those activities. There was no association between the other discipleship styles (e.g. serving, testimonial, intellectual) employed by leaders to foster relational discipleship. The discussions and conclusion of this study were based on these three studies (In-depth Interview, Focus Groups Discussions and the Structured Questionnaire Survey). / Practical Theology / D. Phil. (Theology)

Libraries, particularly academic libraries implement technologies to enhance their services to promote teaching, learning and research. In this thesis the impact of information technologies (library technologies) on delivery of services at the Balme Library of the University of Ghana was evaluated. The researcher adopted the multi-methods approach to the research by using a semi-structured questionnaire to collect data from users (students) of the library and para-professional staff of the Balme Library of the University of Ghana who formed one group of the study. The interview was used to collect data form professional staff of the library who on the other hand formed the second group of the study. Responses of the data collected from the two groups formed the components of the study and data collected quantitatively were analysed using univariate analysis method and interpreted by the descriptive and inferential statistics method. The qualitative data, on the other hand, was analysed using the narrative analysis approach. The findings of the study reveal that a variety of IT facilities such as computers, internet, photocopiers, scanners, braille embossers, magnifiers for reading, reference management software, video conference facility, electronic theses, electronic databases, automated library system, electronic past questions and the library website are available at the library and are very accessible to all users (students) and staff of the library. Students and staff of the library have good IT skills to utilise those resources. The findings also reveal that the IT infrastructure had positive impacts on the delivery of library services ensuring that users received the appropriate services they needed at the right times and places The study found challenges of slow internet connectivity, unstable power supply, lack of IT skills, inadequate IT infrastructure among others and these hinder the maximum utilisation of IT in and out of the library and recommends periodic training of staff and users, proper maintenance of facilities, increase of internet bandwidth and better marketing of library services / Information Science / M. Inf. (Information Science)

Paradigms of housing policies in developing countries have undergone significant changes since the 1940s in the post-colonial era. The involvement of international development agencies such as the World Bank and the United Nations with their substantial financial and technical resources have engendered a conventional narrative of the hegemony of paradigms sponsored by these agencies. It is in this light that the “enabling principles” of housing policy emerged as the dominant policy discourse from the 1980s. This housing paradigm -“enabling shelter policies” –was actively promoted by the World Bank and the United Nations, acting through its housing agency the UN-Habitat, for adoption by developing countries to reform their housing sectors from the 1980s. One of the main instruments of the enabling principles was the withdrawal or contraction of the state from direct housing development in preference for private sector-led and community initiatives in housing development. Government involvement in direct development of housing was conceived to be an ineffective policy choice which had little geographic impact and therefore had to give way to a systematised approach to housing delivery. Ghana was one of the first African countries to adopt these principles for the reform of the housing sector in the country. Two decades later, it has been observed that the government was making housing policy choices that contradicted the ethos of the enabling principles. In particular it was observed that the state was re-engaging in direct housing development. In the light of the past conception of these activities as being defective policies, their re-emergence was characteristic of policy “reversionism”. This concept of policy reversionism is adopted from theories of theology and criminal justice (where it is known as recidivism) in which processes of reform or progression are reversed. The question explored by the thesis is why housing policy reversionism was emerging and what were the generating factors. The thesis draws on a critical realist perspective to deconstruct the conventional narratives about the homogenous state and the hegemony of international agencies such as the World Bank and the UN in the advancement of “unproblematic” enabling principles through which the housing sector reforms were designed and implemented. In doing so the thesis established the heterogeneity of the state driven by competition for domination by sectoral, intra-state as well as supra-state interests. In this process, hegemony becomes vulnerable to manipulation as these principles were translated or “indigenised”. Furthermore it is established that this nuanced perspective is further complicated by a dialectical relationship between the contexts of events and prevailing material conditions and the actions taken by policy agents. These complexities layered the housing policy sphere in ways that masked the primary motivations of class interests and political legitimisation underpinning the incidence of reversionism.

Malaria ist noch immer die häufigste parasitäre Erkrankung in den Tropen. Vor allem afrikanische Kinder < 5 Jahren sind betroffen. Die steigende Chloroquinresistenz ist für einen deutlichen Anstieg der Kindersterblichkeit verantwortlich. Mehrere Studien belegen, dass die Kombination von Chloroquin (CQ) mit Sulfadoxin-Pyrimethamin (SP) in Afrika bei niedriggradiger CQ-Resistenz die therapeutische Wirksamkeit erhöht und damit auch die Resistenzentwicklung gegenüber beiden Medikamenten verzögern kann. Bei 315 Kindern im Alter von 6-59 Monaten wurde von Nov. 2000 bis Nov. 2001 eine Studie zur Epidemiologie der Malaria und zum Therapieausgang von CQ und SP in Tamale/Nord-Ghana durchgeführt. Bei Vorliegen einer Malaria wurde mit CQ und SP behandelt und der Therapieausgang gemäß eines modifizierten WHO-Protokolls von 1996 ermittelt. Die Gesamtzahl der Malaria-Episoden im Zeitraum betrug 836. In der Regenzeit erkrankte mit 23,7% ein signifikant höherer Anteil der Kinder an Malaria als in der Trockenzeit mit 9,4%. Ein frühes Therapieversagen (ETF) wurde in 5% der Fälle beobachtet, ein spätes Therapieversagen (LTF) in 19,5% der Fälle. 211 Fälle (68,7%) hatten einen klinischen Therapieerfolg (ACR). Alter < 3 Jahren war ein unabhängiger Einflussfaktor für ETF und Gesamttherapieversagen. Eine hohe Parasitendichte war ein unabhängiger Einflussfaktor für LTF und Gesamttherapieversagen. Das Risiko, ein Gesamttherapieversagen (ETF + LTF) zu entwickeln, war in der Regenzeit um das 6-fache gegenüber der Trockenzeit erhöht. Bei allen erstmalig mit CQ und SP behandelten Fällen (n = 206) war der ACR (72,3%) statistisch grenzwertig höher als bei zweiter oder mehrfacher Behandlung (61,4%; n = 101). Bei den mehrfach therapierten Fällen bestand mit 27% gegenüber 16% bei den erstmalig therapierten Fällen ein signifikant höheres Risiko, ein LTF zu entwickeln. Die Erholung des Hb-Gehalts bei den erfolgreich therapierten Fällen betrug 0,6 g/dl und unterschied sich signifikant vom Hb-Anstieg (0,4 g/dl) bei Fällen mit LTF. Ein Vergleich des ACR der beschriebenen Studie mit einer zuvor durchgeführten CQ-Studie ergab keinen signifikanten Unterschied. Die Ergebnisse dieser Studie legen die Schlussfolgerung nahe, dass sich die Therapie aus CQ und SP wegen der hohen CQ-Resistenz und der sich rasch entwickelnden SP-Resistenz zumindest in Nordghana nicht eignet. / Malaria remains the most frequent parasite disease in the tropics. Especially African children under 5 years are at risk. The rising chloroquine resistance is the cause for a significant increase in childhood mortality. Several studies indicate that the combination of chloroquin (CQ) and sulfadoxine-pyrimethamine (SP) in Africa with low-grade CQ resistance increases the therapeutic efficacy and can thus slow down the development of resistance to both drugs. The epidemiology of malaria and the therapeutic outcome of CQ and SP was assessed in a cohort study of 315 children aged 6-59 months from November 2000-November 2001 in Tamale/Northern Ghana. In the case of malaria a combination therapy of CQ and SP was given and the therapeutic outcome was assessed in a modified WHO protocol. The total number of all malaria episodes in the observation period was 836. In the rainy season, the amount of the children with malaria was significantly higher than in the dry season (23,7% vs. 9,4%). Early treatment failure (ETF) was observed in 5% of the cases and late treatment failure (LTF) in 19,5%. 211 cases (68,7%) fulfilled the criteria for adequate clinical response (ACR). Age under 3 years was an independent predictor for ETF and overall therapeutic failure. High initial parasite density was an independent predictor for LTF and overall therapeutic failure. The risk of developing an overall therapeutic failure (ETF + LTF) was 6 times greater in the rainy season than in the dry sason. In all cases with the first treatment of CQ and SP (n = 206), the percentage of ACR (72,3%) was significantly greater than in cases treated twice or more (61,4%, n = 101). Cases with 2 or more treatments were at a significantly higher risk of developing a LTF than cases with one treatment (27% vs. 16%). The recovery of the hb levels in cases with successful treatment was 0,6 g/dl and was significantly different from the haemoglobin increase in cases with LTF. A comparison between the therapeutic success of CQ and SP with CQ alone did not show a significant difference. The results of this study indicate that the combination therapy of CQ and SP is no longer useful for treatment of uncomplicated malaria in Northern Ghana because of the high CQ resistance and the increasing resistance of SP.

Eine geringe Wertschätzung von Zwischenhändlern wie in vielen Entwicklungsländern ist auch in Ghana vorzufinden, was einerseits aus geschichtlichen Gründen aber auch aus Unwissenheit entsteht. Der Bereich der Zwischenhändler ist vorwiegend durch Frauen aus ruralen Gebieten betrieben, die Analphabeten und Autodidakten sind. Der Handel ist auf jeder Ebene organisiert, von den Kommunen über die Distriktstädte, die regionalen Hauptstädte und auch über die Grenzen des Landes hinaus. Die Händlerinnen organisieren damit den Warenfluss von den entlegenen Plätzen der Produktion oder aus dem Ausland, um es zu den Märkten mit der Nachfrage in den Ballungszentren und den großen städtischen Märkten zukommen zu lassen. Nichtsdestotrotz werden bei diversen Programmen der Entwicklungsorganisationen die Händler und vor allem Händlerinnen außen vor gelassen, die Konzentration und Aktivitäten wird auf die Produktion und teilweise auf die Handhabung nach der Ernte fokussiert. Der Wertschöpfungsketten-Ansatz verfolgt jedoch per definitionem alle Akteure in der Kette der Wertschöpfung, allein hierbei fehlen die Händler in der Umsetzung. Die Arbeit soll daher aufzeigen, welche Funktionen die Händlerinnen in den drei ausgewählten Fällen übernehmen und wie somit die Entwicklung von Wertschöpfungsketten optimiert werden und letztendlich die beteiligten Händlerinnen zu einer Verbesserung der Wertschöpfungskette beitragen können. / Trade is a widespread occupation for women in West Africa; such as petty traders that are involved with informal trade mainly. The case in Ghana is different as most of these traders are facing hostile treatment and harassment from many sides. Nevertheless, in development cooperation projects, rural economic development and development of its population is often targeted; whereas solely rural development projects have become projects to support value chains and its stakeholders. These value chains start at agricultural production, further on to processing and altering the raw product until its final condition for sale to the end consumer. The entire value chain deals with many diverse actors in rural and urban areas and also diverse areas of economies, such as micro and small enterprises, and other in private sector or public sector. Therefore, development cooperation dealing with value chain enhancement would address all actors. In Ghana, mainly production side and post-harvest management are dealt with and trade or intermediary trade is circumvented. Some projects openly state that they leave out traders from their interventions in value chains. Most prejudices of this type have derived from historical events and official institutions, also a lack of knowledge. Traders are by contrast those who are coordinating streams of goods from beyond borders to supply to domestic markets and vice versa, manage large quantities for export. The reason that women continue to work in trade is that they barely have alternatives.

A la suite du Congrès panafricain de Manchester (octobre 1945), puis de son indépendance en mars 1957, le Ghana a été jusqu'en 1966 le centre de dynamiques transnationales trouvant leur origine dans la transformation sociale et politique de l'espace franco-africain. Considérant que l'indépendance du Ghana était liée à la libération totale du continent africain, Kwame Nkrumah a travaillé à construire la jeune nation africaine en tant que porte-drapeau du panafricanisme et embryon d'une union d'États africains indépendants et affranchis des cadres hérités de la période coloniale. C'est dans ce but qu'il a tissé un réseau d'alliances politiques et accueilli nombre de militants et intellectuels francophones qui ont contribué à nourrir une réflexion sur la transformation des empires, le panafricanisme, le néo-colonialisme, la lutte armée et la Révolution africaine. La construction d'un appareil de propagande à même de produire et de diffuser un imaginaire panafricain mobilisateur tant à l'intérieur qu'à l'extérieur du pays a été l'une des principales réalisations de l'époque. Dans le même temps, de grandes difficultés ont été rencontrées dans l'organisation politique des populations migrantes originaires de l’espace franco-africain et résidant au Ghana. Devenu un carrefour de la Révolution africaine, le Ghana a été progressivement amené à devenir un laboratoire où se discutaient et se construisaient une praxis et une idéologie reposant sur l'analyse des conditions politiques issues des indépendances africaines. La jeune nation a ainsi offert un lieu favorable à l'observation et l'étude du croisement des dynamiques qui ont traversé les anciens empires britannique et français. / Following the Pan-African Congress in Manchester in October 1945 and then its independence in March 1957, until 1966, Ghana became the center of transnational dynamics, which had their roots in the social and political transformation of French Africa. Convinced that the independence of Ghana was linked to the total liberation of the African continent, Kwame Nkrumah worked towards building this young African nation as a standard bearer of Pan-Africanism and as the nucleus of a union of independent African States, which would be freed from the structures inherited from the colonial period. To this end, Ghana formed a number of political alliances, and provided shelter and work for many francophone militants and intellectuals who, in turn, contributed to the reflex ions on the transformation of empires, Pan-Africanism, neo-colonialism, armed struggle and the African Revolution. The establishment of a propaganda machine able to produce and to widen a Pan-African imagined community in order to mobilise inside as well as outside Ghana was one of the main realizations of the period. Meanwhile, there were great difficulties regarding the political organization of the migrant populations coming from French Africa and living in Ghana. As a crossroads of the African Revolution, Ghana was progressively pushed to become a testing ground where a praxis and an ideology based upon an analysis of the political conditions coming from the newly independent African states were being discussed and built. The young nation proved to be a place where the intersection of the dynamics, which crossed both the former French and British empires, can be observed and studied.

Les Trypanosomoses Animales Africaines (TAA) sont une contrainte majeure à la viabilité et à la durabilité des systèmes de production de bétail au Ghana. Sous la tutelle de la Campagne Pan-Africaine d'Eradication des Tsé-tsé et des Trypanosomoses (PATTEC), le Ghana collabore avec le Burkina Faso au sein d'un projet sous régional pour créer une zone libérée de glossines à leur frontière commune. Les objectifs de cette thèse sont de i) déterminer la situation initiale avant intervention en ce qui concerne le vecteur et la prévalence de la maladie dans la zone de lutte, ii) déterminer la structure des populations de glossines et ses conséquences sur la durabilité des efforts de lutte anti-vectorielle, iii) évaluer l'efficacité de la Pulvérisation Séquentielle d'Aérosols insecticides (SAT) pour contrôler les glossines riveraines et iv) évaluer les risques environnementaux associés à cette stratégie de lutte. Les résultats de l'enquête de base conduite dans la région nord-ouest du Ghana (zone d'étude) ont montré une large distribution de Glossina tachinoides alors que Glossina palpalis gambiensis était limitée à la limite sud de la zone d'étude. La prévalence parasitaire moyenne chez les bovins était de 2.5% (IC 95%: 1.06-5.77) et la prévalence sérologique de 19% (IC: 14.03-25.35). La densité apparente par piège et par jour (DAP) des glossines était de 8.7, 1.9 et 1.3 respectivement le long des rivières Volta noire, Kulpawn et Sissili. Une structuration génétique importante des populations de G. tachinoides a été observée entre sites d'étude d'un même bassin versant et entre bassins versants. Une densité locale de 0.48-0.61 glossines/m² a été inférée, ainsi qu'une distance de dispersion d'environ 11m par génération [IC 9 - 17]. Aucun biais de dispersion sexe-spécifique n'a été détecté. La dispersion observée était suffisante pour qu'une zone libérée de G. tachinoides puisse être ré-envahie par les populations mitoyennes des bassins versants adjacents.L'efficacité de la SAT à éliminer les espèces de glossines riveraines dans une section particulièrement difficile (canopée très dense et fortes densités de glossines) et l'efficacité ultérieure, un an après la SAT, d'une stratégie de lutte intégrée, ont également été testées. Les résultats montrent l'échec de l'éradication, attribué à une pénétration insuffisante des aérosols insecticides dans les galeries forestières denses. Toutefois, le taux de réduction global obtenu par la SAT fut important (98%) et la stratégie intégrée parvint à maintenir un niveau important de suppression des glossines. Enfin, une mesure de l'impact environnemental du projet a montré un impact non significatif de la deltaméthrine en aérosols sur les arthropodes aquatiques et terrestres non-ciblés. / African animal trypanosomosis (AAT) is a major constraint to viable and sustainable livestock production systems in Ghana. Under the umbrella of the Pan African Tsetse and Trypanosomosis Eradication Campaign (PATTEC), Ghana is collaborating with Burkina Faso in a sub-regional initiative aiming at creating tsetse-free areas across their common borders. The objective of this thesis was to conduct research to guide project implementation and specifically seeks to i) determine the pre-intervention vector and disease situation of the intervention area, ii) determine tsetse population structuring and the consequences on sustainable tsetse control efforts, iii) evaluate SAT for the control of riverine tsetse species in Ghana and iv) evaluate the environmental risk of the intervention programmes. Results of a baseline survey conducted in the Upper West Region (study area) indicated a wide-spread prevalence of Glossina tachinoides but Glossina palpalis gambiensis was limited to the southern edge of the study area. Average parasitological prevalence in cattle was estimated at 2.5% (95% CI: 1.06–5.77) and serological prevalence measured at 19% (95% CI: 14.03–25.35). The mean Index of Apparent Abundance (IAA) of tsetse was 8.7, 1.9 and 1.3 for samples taken along the Black Volta, Kulpawn and Sissili Rivers, respectively. Investigations of the G. tachinoides populations confirmed significant structuring within and between the three main river-basins of the study area, and indicated a local density of 0.48-0.61 flies/m² and dispersal distance that approximated 11 m per generation [CI 9 - 17]. No significant sex-biased dispersal was detected. However, the observed dispersal was deemed sufficient for a G. tachinoides-cleared area to be reinvaded from neighbouring populations in adjacent river basins. The potential of Sequential Aerosol Technique (SAT) to eliminate riverine tsetse species in a challenging subsection (dense tree canopy and high tsetse densities) and the subsequent efficacy of an integrated strategy, one year after the SAT operations, were also investigated. Results indicated failure to achieve elimination, attributed to insufficient penetration of insecticide aerosols in thick riverine forest galleries. However the overall reduction rate due to SAT was important (98%) and the subsequent integrated strategy maintained high levels of tsetse suppression. Finally an environmental impact assessment revealed no significant impact of deltamethrin aerosols on non-targeted aquatic and terrestrial arthropods.

Text in English / Advertising is a genre of mass media communication which unearths the exceptional qualities of products and services in a persuasive fashion. It is also a form of marketing communication through which business organizations inform the general public about new or improved commercial endeavors. Advertising in modern time comprises varied component parts (visual imagery, graphic and color designs, print and auditory techniques.); however, language plays an indispensable role in the transmission of the message. Language has an immense influence on human beings and the way they behave. The language of advertising influences the reasoning, thinking, feeling and the general attitude of the audience. Copywriters, like poets, choose their words carefully in order to achieve a particular rhetorical effect. They use language in such a way that they attract attention, arouse interest or desire and create need. Language forms an integral part of advertisements. The current study focused on persuasive elements in the English employed in advertisements in newspapers in Ghana. The study investigated the extent to which Aristotle’s three artistic proofs (logos, pathos and ethos), figures of speech and grammatical elements in the English of advertisements in the Ghanaian newspapers were employed by copywriters for persuasive effect. The current study was underpinned by three theories, namely, Aristotle’s Rhetorical Theory, Conventional Figurative Language Theory and the Standard Theory of Generative Grammar. These theories lent support to the three thematic trends of the study. The qualitative research design was employed given the interpretive nature of the analysis of the corpus. The current study did not involve human subjects as data sources because the corpus was from written documents. The purposive sampling method was employed owing to the subjective nature of the process of data collection. The qualitative content analysis approach was adopted as the analytical framework for the study. This made it possible for the coding of categories of the textual data based on the themes, patterns and trends that emerged. The findings of the research revealed that copywriters in the Ghanaian newspapers employed Aristotle’s three artistic proofs, figures of speech and grammatical elements in the English of advertisements for persuasive effect. / Linguistics and Modern Languages / D. Phil. (Language, Linguistics and Literature)