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Critical assessment of leadership skills in developmental local government: a case study of Buffalo City Municipality in the Eastern Cape

- Mnyatheli, Mbeko Bandla Sizasomzi

Authors: Mnyatheli, Mbeko Bandla Sizasomzi
Date: 2011-01
Subjects: Leadership , Municipal government , Buffalo City (South Africa)
Language: English
Type: Master's theses , text
Identifier: http://hdl.handle.net/10353/26175 , vital:64950
Description: This study seeks to examine the nature and role of leadership, in pursuit of a suitable leadership for a Developmental Local Government environment. The aim of this study is to describe the nature of leadership, particularly in local government, and in public organization in general. The study begins by teasing out the various concepts and terminology attendant with leadership in this environment. The study further reviews relevant literature as basis for understanding and goes on to interrogate the general theories on leadership with a view to choose the best practice in leadership of a developmental local government. Central to its quest for answers, is the drive from the constitutional mandate, a developmental local government imposed to municipality by the constitution of the Republic of South Africa, (1996) arising out of the need to transform the South African local government from an erstwhile policy of racial segregation to a new democratic political dispensation fostering equity and access to services and resources for all citizens. The challenge for the new leadership therefore is how to deal, speedily with the huge disparities and socio-economic backlogs? What kind of leadership and what level of knowledge, skills and competencies are required and how soon can public goods and services be delivered to the satisfaction of the communities it serves? ‘Analysis of variance’ was used to analyse and interpret data collected. Literature on the difference between transactional and transformational leadership formed the basis of the findings. Finally, findings and conclusions were drawn. On the bases of these, recommendations for Buffalo City Municipality were presented. , Thesis (MPA) -- Faculty of Management and Commerce, 2011
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Date Issued: 2011-01

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Evaluation and comparison of rural and industrial brick masonry units for sustainabile low cost housing

- Maweza, Elijah Loyiso

Authors: Maweza, Elijah Loyiso
Date: 2011-01
Subjects: Masonry
Language: English
Type: Master's theses , text
Identifier: http://hdl.handle.net/10353/24923 , vital:63676
Description: The lack of adequate housing for the rural population of South Africa is experienced in every community. The South African government has drawn policies, strategies and required standards that must govern the provision of housing to the people. One of the required standards of housing is that the walls be constructed in such a way that they are able to adequately resist water penetration into any part of the building where it would be detrimental to the health of the occupants or the lifespan of the building. This research took the investigation of the characteristics of bricks that increase or reduce water absorption by bricks as the main objective. The investigation looked first at the raw materials of bricks, the soils and clay. The particle size related soil fractions were investigated because particle sizes are directly linked to the porosity of the bricks. Porosity describes the percentage of pores that are in the bricks, which show the extent to which bricks can internally accommodate moisture. Soil mineralogy was also discussed because as bricks are fired, the changes that they undergo affect the mineralogy of the bricks. The manufacturing procedures (brick moulding and firing) as reported from literature are briefly discussed in chapter 2. The effect of heat on clays is also discussed in order to explain the changes that occur as a result of firing. The porosity and the sorptivity of bricks were the relevant brick properties that are discussed. The methods employed to investigate the characteristics of bricks as discussed in chapter 3 were as follows: (i) Winning and preparation of raw materials. (ii) Particle size analysis. (iii) Water and carbon content in newly formed rural and industrial bricks. (iv) The firing procedures and temperature distribution investigation. (v) The chemical composition of rural and industrial bricks. (vi) Porosity. (vii) The Neutron Radiography equipment and operations. (viii) Sorptivity. With these investigations it was discovered that the quality of the bricks can be improved by: (i) Selecting and preparing the raw materials. This can be done by considering the soil types and reducing the soil particle sizes by sieving and grinding. (ii) Moulding the bricks properly by thoroughly working the soil, reducing the water content and increasing compaction. (iii) Drying the bricks using the sun and the exhaust heat from the kilns that are firing bricks at the time. (iv) Adopting brick firing techniques that produce the desired bricks more efficiently. , Thesis (MSc) -- Faculty of Science and Agriculture, 2011
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Date Issued: 2011-01

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Functionalized Ru(II) polypyridines and phthalocyanines: Potential dyes for dye-sensitized solar cells(DSSCs)

- Adeloye, Adewale Olufunsho https://orcid.org/0000-0003-1736-5738

Authors: Adeloye, Adewale Olufunsho https://orcid.org/0000-0003-1736-5738
Date: 2011-01
Subjects: Phthalocyanines , Dye-sensitized solar cells
Language: English
Type: Doctoral theses , text
Identifier: http://hdl.handle.net/10353/24365 , vital:62645
Description: This study describes the design, synthesis, characterization and preliminary investigation of the solar-to-electrical energy conversion efficiency of ruthenium(II) functionalized polypyridine and phthalocyanine complexes with extended π-conjugation. Polypyridinyl functionalized with anthracene, 2,3-dimethylacrylic acid and 1-methoxy-1-buten-3-yne were synthesized and characterized by infrared, UV-Vis, photoluminescence, 1H and 13C NMR and elemental analysis. The functionalized polypyridine molecules were used to synthesize various ruthenium(II) homoleptic/heteroleptic and/or heteronuclear complexes and their photophysical and electrochemical properties evaluated. The preliminary results of the solar-to-electrical conversion efficiencies of some synthesized Ru(II) polypyridyl complexes were presented in chapter 5. It was found out as expected that the ruthenium(II) polypyridine complexes containing either heteronuclear polypyridine ligands or their thiocyanate analogues of the types [Ru(L1)2L2(PF6)2], [RuL1(L2)2(PF6)2] and [RuL1L2(NCS)2], showed better photophysical properties (red-shifted metal-to-ligand charge-transfer (MLCT) transitions concomitant with enhanced molar extinction coefficients), luminescence and interesting electrochemical redox properties than those containing homonuclear ligand types [Ru(L1)3(PF6)2]. The ruthenium(II) anthracenyl functionalized phthalocyanine complexes which were obtained by electrophilic aromatic substitution reactions in the peripheral positions gave good solubility properties in various organic solvents and also showed interesting near infrared absorption and electroredox characteristics. Cyclic and square wave voltammetries of these complexes revealed major redox processes and the numbers of electron(s) transfer were determined by chronocoulometry. It was established that a mono- and/or multi-electronic transfer reactions can occur in the various ruthenium(II) complexes. The photophysical properties of some complexes showed them to be better and promising candidates in the design of chemosensors, organic light emitting diodes (OLEDs) and as photosensitizers, while their redox-active natures make them potential mediators in electron-transfer for various photochemical processes. However, due to low surface concentration and/or adsorption of some tested complexes on TiO2 semiconductor nanocrystalline particle, low currents were generated and the highest solar-to- electrical conversion efficiency recorded in this study was 0.10 percent. , Thesis (PhD) -- Faculty of Science and Agriculture, 2011
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Date Issued: 2011-01

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Functionalized Ru(II) polypyridines and phthalocyanines: Potential dyes for dye-sensitized solar cells(DSSCs)

- Adeloye, Adewale Olufunsho https://orcid.org/0000-0003-1736-5738

Authors: Adeloye, Adewale Olufunsho https://orcid.org/0000-0003-1736-5738
Date: 2011-01
Subjects: Phthalocyanines , Dye-sensitized solar cells
Language: English
Type: Doctoral theses , text
Identifier: http://hdl.handle.net/10353/24343 , vital:62638
Description: This study describes the design, synthesis, characterization and preliminary investigation of the solar-to-electrical energy conversion efficiency of ruthenium(II) functionalized polypyridine and phthalocyanine complexes with extended π-conjugation. Polypyridinyl functionalized with anthracene, 2,3-dimethylacrylic acid and 1-methoxy-1-buten-3-yne were synthesized and characterized by infrared, UV-Vis, photoluminescence, 1H and 13C NMR and elemental analysis. The functionalized polypyridine molecules were used to synthesize various ruthenium(II) homoleptic/heteroleptic and/or heteronuclear complexes and their photophysical and electrochemical properties evaluated. The preliminary results of the solar-to-electrical conversion efficiencies of some synthesized Ru(II) polypyridyl complexes were presented in chapter 5. It was found out as expected that the ruthenium(II) polypyridine complexes containing either heteronuclear polypyridine ligands or their thiocyanate analogues of the types [Ru(L1)2L2(PF6)2], [RuL1(L2)2(PF6)2] and [RuL1L2(NCS)2], showed better photophysical properties (red-shifted metal-to-ligand charge-transfer (MLCT) transitions concomitant with enhanced molar extinction coefficients), luminescence and interesting electrochemical redox properties than those containing homonuclear ligand types [Ru(L1)3(PF6)2]. The ruthenium(II) anthracenyl functionalized phthalocyanine complexes which were obtained by electrophilic aromatic substitution reactions in the peripheral positions gave good solubility properties in various organic solvents and also showed interesting near infrared absorption and electroredox characteristics. Cyclic and square wave voltammetries of these complexes revealed major redox processes and the numbers of electron(s) transfer were determined by chronocoulometry. It was established that a mono- and/or multi-electronic transfer reactions can occur in the various ruthenium(II) complexes. The photophysical properties of some complexes showed them to be better and promising candidates in the design of chemosensors, organic light emitting diodes (OLEDs) and as photosensitizers, while their redox-active natures make them potential mediators in electron-transfer for various photochemical processes. However, due to low surface concentration and/or adsorption of some tested complexes on TiO2 semiconductor nanocrystalline particle, low currents were generated and the highest solar-to-electrical conversion efficiency recorded in this study was 0.10 percent. , Thesis (PhD) -- Faculty of Science and Agriculture, 2011
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Date Issued: 2011-01

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