Palabras del Sr. Kofi A. Annan

Discurso del ex Secretario General de Naciones Unidas durante la conferencia pronunciada por José Luis Rodríguez Zapatero en el Museo del Prado el 16 de junio de 2008, organizada por el Real Instituto Elcano, con la colaboración de la Fundación CIDOB, la Fundación para las Relaciones Internacionales (FRIDE), el Instituto Complutense de Estudios Internacionales (ICEI) y el Instituto de Cuestiones Internacionales y de Política Exterior (INCIPE)

International joint venture with a government partner case study: copper mining in Zambia

Thesis (M.S.)--Massachusetts Institute of Technology, Sloan School of Management, 1972.Includes bibliographical references.by Kofi A. Annan [and] R. Anthony H. Aitken.M.S

The Impact of ICT on Teaching and Learning in Tertiary Institutions: A Case Study of Wisconsin International University College, Ghana

The frightening effect of the increasing spate of poor teaching and learning in recent times underscores management of tertiary institutions, lecturers and students concern for the integration of ICT into tertiary institutions. The study specifically aimed at evaluating the benefit of various ICT tools used by tertiary institutions and examines the challenges tertiary institutions face in terms of implementing ICT in teaching and learning. Another objective is to determine the role of lectures, administrators and students in integrating ICT into tertiary institutions. The research was conducted on lecturer’s administrators and students of Wisconsin International university College, Ghana and information was gathered through administration of structured questionnaires. Three null hypotheses were postulated and tested at 0.05 level of significance. Results from the study indicated that there is a positively high impact of ICT on teaching and learning in tertiary institutions in the sense that, broadband is a major factor in increasing collaboration between teachers; Interactive whiteboards make a difference to aspects of classroom interaction. motivate both lecturer students to use ICT.The findings also presented challenges, where students need to access computers in an easy way; recurrent technical problems; and the use of software applications require skills that have to be gotten. It was then recommended based on the findings of the study that, policy makers should include new competencies in the curricula and in assessment schemes, implement new forms of continuous professional development in a workplace environment and also Keywords: Information system in education, Teaching and Learning, Important of ICT

Effect of hot working characteristics on the texture development in AISI 430 and 433 ferritic stainless steel

The last seven hot rolling passes of the ferritic stainless steels (FSS) AISI 430 and AISI 433 (the latter an Al-added variant of 430) were simulated on Gleeble-1500D® and Gleeble-3800TM® thermo-mechanical simulators to investigate the effect of temperature, strain rate and inter-pass time on the development of texture in these steel grades and its subsequent influence on ridging. The compression tests were carried out over a wide range of strain rates (0.1 s-1 to 5 s-1, 25 s-1 and 50 s-1) and temperatures (1100 to 820 oC) with different inter-pass times (2 s, 10 s, 20 s and 30 s). The transition temperature from dynamic recrystallization (which may introduce a texture change) to dynamic recovery (in which no texture changes are expected) was determined by examining the relationship between the mean flow stress and the deformation temperature in multi-pass tests. Both macrotexture (XRD) and microtexture (EBSD) analyses were employed to characterise and study the texture present in these steels. It was found that the texture in the central layer of the compressed sample is a strong recrystallization-type. The through-thickness textural and microstructural banding was found to be responsible for ridging in these grades of stainless steels. Dynamic recrystallization which promotes the formation of the desired ã-fibre texture leading to high ductility, formability and eventually reduction or elimination of ridging, was found to occur in both AISI 430 and AISI 433 at high temperatures, low strain rates and longer inter-pass times with multi-pass testing. Generally AISI 433 has a stronger gamma texture developed than the AISI 430 when hot rolled under similar conditions, which leads to improved ductility and less ridging in AISI 433 than AISI 430.Dissertation (MSc)--University of Pretoria, 2012.Materials Science and Metallurgical Engineeringunrestricte