P.hD. INDUSTRIAL DESIGN S/N NAME THESIS TITLE YEAR REG NO ABSTRACT 1. Datiri, Yohanna Chumang An Investigation of the Suitability of Kerang And Miango Volcanic Ashes for the Production of Ceramic Bodies and Glazes 2011 PGS/20062007/302028 The study was inspired by the desire to investigate on more materials for ceramic production from the immediate environment. It targeted the utilization of the abundant volcanic ashes that are found in Kerang and Miango, both in Plateau State, Nigeria for the development of ceramic bodies and glazes. Basically, this study comprised field, laboratory and studio work. Importantly, theoretical framework was reviewed on the following areas: Sampling of ceramic materials, mixing (coning and quartering) of sampled materials, milling (beneficiating) ceramic materials, compounding ceramic bodies, determining of shrinkage values, determining of apparent porosity and water absorption, and glaze blending. Materials were beneficiated following prescribed schemes and laboratory analysis carried out to determine concentrations of elements in each of the samples under study. The XRay fluorescence spectrometric technique (XRF) was used for this purpose. The materials were tested for plasticity/particle size, shrinkage, and for porosity. The samples were processed in schemes adapted from ASTM C326-76 AREA FOR RESEARCH FURTHER and C373-72 on shrinkage, porosity and water absorption tests. Glazes were subsequently compounded through blending volcanic ashes of Kerang and Miango with volcanic cinders, tuff, volcanic glass and Jos feldspar in sixty six member triaxial test and in thirty six member quadrilateral tests to determine their suitability for glazes. 12000C was found to be the most suitable operational temperature for both ceramic bodies and glazes. The results of the property test revealed that volcanic ashes from Kerang and Miango had coarse particles which made volcanic ash to possess low plasticity especially for throwing purposes. When blended with Barkin Ladi Kaolin however, ratios 7:3 and 6:4 of volcanic ash to kaolin were found to be most suitable for ceramic body formation. 56 out of 138 blends, representing 41% of glazes mixed were found to be good, producing glazes with gloss, semi-matt and matt effects. The glazes are recommended to potters as they were found to be stable. 2. Umar, Abdullahi Danladi Adinoyi Studies on the Qualities of Alkaleri Kaolin in High – Fired Ceramics 2000 PG, 0484 The art and science of high - fired ceramics though closely associated with the construction of high temperature kilns is mostly associated with the mastery of materials science. Kaolin, a high temperature ceramics material is a common feature in the geology of Northern Nigeria. The Alkaleri kaolin deposit in the North - East of Nigeria having been quantified. deserves study to determine its suitability for high - fired ceramics. The samples were beneficiated and tested for physical and chemical properties as prescribed by ASTl'vl Standard C 326 - 76, C-325 - 81, C- 323 - 56, C - 343 - 72 with some modifications. Furthermore, both the Biaxial and Triaxial blends of each kaolin with other high temperature fluxes and stoneware clay were carried out to form bodies and glazes. The Chemical Analysis of the kaolin samples reveal that they are high in Alumina, high in Silica, low in impurities and have a high Loss of Ignition. The Sieve Analysis revealed the coarse nature of the kaolins. They also recorded a high percentage of sand and a low percentage of clay content. The physical tests also reveal the low plasticity of the kaolins. The kaolins recorded a linear shrinkage of between 12% - 13% and an Abscrption Rate of between 15.5% and 17.4%. the Rafin Makaranta Secondary Clay recorded an Absorption Rate of 1.39%. Strong bodies emerged from the Biaxial and Triaxial blends. The bodies recorded a linear shrinkage rate of between 9% and 13%, the China bodies recorded the highest linear shrinkage rate. The China bodies fused in firing and equally recorded the lowest Absorption Rate. The highest Breaking Strength was recorded by the China bodies. The refractories still open, absorbed the most and recorded the lowest breaking strength. The stonewares cast well in the mould while the China and Porcelain bodies presented some casting difficulties. Some of the glazes derived fit the bodies, others, crawled. An analysis of variance carried out confirmed the reliability of reporting in percentages at P ,0.001, P < 0.005 and P < 0.001 for the Absorption Rate and Shrinkage Rate data. 3. Wuritka, Enoch Gotring Investigation into the Qualities of Selected Metal Jewelries 2008 PGS/20002001/304040 The quality of various jewelries that are commonly used by women in Bauchi was investigated by determining the percentage concentration of metals present in them using X - ray fluorescence (XRF) spectrometric technique. Gold, copper, nickel, and nickel - silver, silver and brass jewelries were sampled from the different markets in Bauchi metropolis and were ground for XRF analysis. Hardness of jewelries was also determined using the Rockwell Hardness tester. The elemental percentage concentrations in the jewelries indicate copper to be in relatively high percentage of concentrations in the different jewelries than other metals. Calcium and some heavy metals occur in varying percentage concentrations in the different jewelries at low levels. The result of the hardness test showed gold, nickel - silver, copper and brass to be higher than Brass and nickel. The result of the hardness was correlated with the percent metal composition. The jewelries revealed positive correlation P s 0.05 in some metals. The presence of heavy metals in jewelries suggests potential health hazards associated with the use of such jewelries The role of dental jewelry on human health Investigation of the release if Au fir various alloys into sweat and saliva The use of Nickel related compounds on orthodontic therapy 4 Yusuf, Otaru Sadiq Exploitation and Adaptation of Biogas to Ceramic Kiln 2004 PG NO. 00016 'Appropriate technology' concept was adopted in constructing and adapting the 'floating-drum' (underground) biogas digester for firing ceramics. Following series of pilot biogas firings directly from the 2m3 floating drum (under ATP) and in existing 10 CF kerosene kiln, less than acceptable (maximum) temperature of 234°c was obtained. Thus, a 4.5 CF model kiln became necessary and, designed and built. This was followed by requisite compression of the biogas into pressure cylinders (between 10 & 28 bars). Subsequently, another series of regular firings, from the pressure cylinders, were conducted. A biscuit temperature of 90Qoc (with about 22m3 storable biogas) was recorded, using standard analogue pyrometer and pyrometric cone. Investigation on the use of processinfrastructure for scrub-and-use of biogas resource Exploitation and Adaptation of Biogas to downdraft and up-draft kiln 5. Ibrahim, Dije Bala Pollution Control in Nigerian Metal and JewelryIndustries 2004 PG. NO 00369 This study was motivated by both the national and international concerns over critical environmental pollution issues and the challenges to scholars, members of the academia and researchers to look into the possibility of controlling pollution within their locality for sustainable development. The Nigerian Metal and Jeweuery industries formed the area for this study with samples randomly selected from two clusters within the study area. Questionnaires/interview were administered and the chi-square method instrument was used to analyse data from the questionnaires. Results of laboratory analysis and information collected during inspection visits were used to further consolidate these findings. The end results have indicated significant correlation between the activities of metal and jewellery industries and environmental pollution in the study area. Consequently, it is concluded that the air, water and soil qualities of the study area were impaired and therefore it is recommended that the existing Nigerian environmental laws and regulations be enforced to ensure compliance by those industries with set standards to check further pollution and environmental degradation. 6. Bala, Bitrus Kaje Appraising the Availability, Usage and Impact of Non-Print Instructional Media in Nigerian Federal Universities of Technology 2010 PGS/20082009/304030 The study set out to appraise the Availability, Usage and Impact of Nonprint Instructional Media in Nigerian Federal Universities of Technology. Four out of the five Federal Universities of Technology were studied. An instrument for the study which was a questionnaire was designed in two sets, one for the lecturers, called 'Teachers Opinion Questionnaire (TOQ)'; and the other for the students called 'Students Opinion Questionnaire (SOQ)' was administered on the selected target population. The data collected was analysed and presented using simple percentages and bar charts to show the general information pictorially in terms of their bars after the data had been converted to percentages. A decision mean of 2.50 was used to decide on whether the factor existed or not, in answering the research questions. A ttest at 0.05 level of significance was used to test the hypotheses. The result of the analysis showed that the extent of familiarity (knowledge) of the non-print instructional media in the Federal Universities of Technology was not significant. The items were in common use (according to the literature reviewed) in most developed and some developing countries of the world. Where they were familiar with the items, the data showed that they were not available for use in the universities. The ones that were available and used in teaching had positive impact on the learning process of the students. Based on the findings, it was recommended that university administrations should make available non-print instructional media to both the staff and students, for effective teaching and learning purposes. Also the Federal Government should increase the budgetary allocation of universities to enable them acquire sufficient quantities of the non-print media for both teaching and learning processes by the teachers and students respectively. 7. Inuwa, Yusuf Mohammed An Assessment of Risk in BuildOperate-Transfer (BOT) Scheme for University Hostel Projects in Nigeria 2013 PGS/20042008/3060179 One of the newest financial schemes for environmental projects is the Build. Operate, and Transfer (BOT) concept, which is being used increasingly worldwide as a project delivery system by which governments obtain the infrastructure projects from private sector after a concession period free of charge. In the Nigerian environment, the concept have been adopted for the provision of students hostels in the Universities but up to now, promoters and investors haw had many fears toward the proposed projects. This study assesses the risks for implementing the BOT system in the Nigerian universities. The data used were collected from the selected Universities through the use of a combination of structured questionnaires and structured interviews with stakeholders and a follow up case study. Various statistical test procedures including Risk Rating Index. One factor analysis of variance b) ranks (Kruskal \\'allis test i. Delphi probability technique and Pareto analysis, were used in the research investigation. During the course of the work, it was discovered that conventional risk assessment: ~l;;!'r\.'~lChes Illel) not be effective in privatized infrastructure projects because of the fact that. ti~e: ha. e \ cr) long project lifecycle with many sector specific risk factors. From the result it \\ as discox ercd that the assessment of complex risks is often a difficult task when past data 011 similar risks are not available. Analyses of the identified risks shows that among the political risk subfactors, termination of concession by government and increase in taxes (specific) ius the highest risk rating index of 0.836 and 0.738 and were therefore rank I and :2 respectively and hence more severe. Similarly. in construction, cost overrun and increase in financing with RRI of 0.760 and 0.689 were respectively the most severe; operation has labour risk and change in cost of operation with RRI of 0.780 and 0.765 respectively as the most severe. Market and revenue risk have monopoly and insufficient tariff with RRI of 0.856 and 0.780 respectively as the most severe. Financial risk has insufficient evaluation of future inflation and fluctuation in foreign exchange rate with RRI of 0.780 and 0.745 respectively as the most severe. Legal risk has breach of financial agreements and title/lease of property with RRI of 0.620 and 0.610 respectively as the most severe. These findings were confirmed by the case study of Emerald hostel project. Finally. a risk probability and impact assessment framework is proposed which prox ides a systematic method to identify, assess and determine the relationship. importance of specific risks across BOT projects lifecycle.