Integration of GPS and GIS in Mapping of Secondary Schools in Akure South Local Government Area of Ondo State Nigeria

The study aims at integrating GPS and GIS in the Mapping of secondary schools in Akure South Local Government Area of Ondo State with a view to identify, map, and create a database for both private and government secondary schools within the study area. A total number of 56 schools were identified. Garmin Map 76CSX hand-held GPS was used in acquiring their positions (coordinate in Eastings and Northings) within the study area while the attribute datawas obtained from the ministry of education. The satellite image of the study area was downloaded from Google Earthwebsite. ArcGIS 10.1 was used for the production of the digital map while Microsoft Access 2007 was used in generating the database. In performing the query, the query builder in ArcView was used. The result of the database reveals that the number of secondary schools owned by the government and private individuals are 26 and 30 respectively, representing 45% and 54% respectively of the total secondary schools within the study area. The created database reveals that some schools have complete facilities with specific laboratories for each of the science subjects while others have incomplete equipment or lack specific laboratory facilities for practical subjects. Furthermore, the study reveals that there are more private schools than government owned secondary schools within the study area

Evaluation of Cocoyam-Soybean Flour Blends and Sensory Properties of the Amala Dumpling

Amala, a staple food among the Yoruba people of South West Nigeria, is mostly produced from yam. Since yam is known to be mostly carbohydrate and soybean is a legume with an appreciable quantity of protein, efforts have been made to prepare amala from the blends of cocoyam and soybean flours. The protein content of the flour blends ranged from 3.73% to 13.81%. In general, there was increase in the concentration of protein with increasing level of soy flour substitution. Unlike protein, the crude fibre content of the flour blends decreased with increasing supplementation of soy flour. Increase in oil content of the flour samples, with increasing addition of soy flour, predisposes the samples to shorter shell life and off flavor because of liability to rancidity. The lowest bulk density of 0.78 g/cm3 was recorded for sample A (100% cocoyam flour) and hence none of the flour blends could be considered as a complimentary infant substitute. In general, supplementation of cocoyam flour with soy flour enhanced the concentrations of protein, ash and dietary fibre. Therefore, it is hoped that consumption of cocoyam amala supplemented with soy flour, a cheap source of plant protein, will not only create dietary diversity, it will make more protein available for the consumers and thus help in alleviating the problem of protein energy malnutrition in developing regions of the world

The Role of Central Banks and Competition Policies in the Rescue and Recapitalisation of Financial Institutions During (and in the Aftermath of) the Financial Crisis

Recent years have witnessed a change in focus from considerations of factors which could impede competition, for example over-regulation, to the need to strike a balance between over-regulation and insufficient regulation – in order to provide the right level of safety for consumers (such that they are protected from risky investments). A driving force behind the need for deregulation over the past two decades has been the objective and desire to foster competition. Re-regulation thereafter assumed centre stage in some jurisdictions in response to the need to manage cross sector services' risks more efficiently. Rescue cases involving guarantees (contrasted with restructuring cases) during the recent Financial Crisis, have illustrated the prominent position which the goal of promoting financial stability has assumed over that of the prevention or limitation of possible distortions of competition which may arise when granting State aid. The importance attached to maintaining and promoting financial stability - as well as the need to facilitate rescue and restructuring measures aimed at preventing systemically relevant financial institutions from failure, demonstrate how far authorities are willing to overlook certain competition policies. However increased government and central bank intervention also simultaneously trigger the usual concerns – which include moral hazard and the danger of serving as long term substitutes for market discipline. An interesting observation derives from the relationship between State aid grants, competition, and the potential to induce higher risk taking levels. Whilst the need to promote and maintain financial stability is paramount, safeguards need to be implemented and enforced to ensure that measures geared towards the aim of sustaining system stability (measures such as lender of last resort arrangements and State rescues) do not unduly distort competition as well as induce higher risk taking levels. This paper will draw attention to safeguards which have been provided by the Commission where approval is considered for the grant of State aid to financial institutions whose problems are attributable to inefficiencies, poor asset liability management or risky strategies. Whether the distinction drawn by the Commission – with regards to the preferential grant of recapitalisation packages to fundamentally sound banks (which require less restructuring measures)is justified, will also be considered. How far central banks and governments should intervene and how far distortions of competition should be permitted ultimately depends on how systemically relevant a financial institution is

Marketing Strategy: A Tool for Library and Information Services Delivery by Academic Libraries in Southwest Nigeria.

Adoption of marketing concept into information oriented organizations such as academic libraries has become imperative especially with the proliferation of information technology where libraries are no longer seen as the sole custodian of knowledge. This study therefore aimed at investigating the need for marketing strategy as tool for library and information services delivery by academic libraries using the various technology driven facilities. The survey research design was adopted for the study. Stratified sampling technique was used to select 6 libraries from federal, state and private owned universities in South Western Nigeria. Total enumeration technique was used in selecting the sample size consisting of 148 librarians and library officers in the institutions. Data were gathered using questionnaire and the findings revealed that face to face approach and use of the notice boards are the most common methods used in these libraries. Though some marketing strategies are already in use, services like indexing and abstracting which is even an ancient strategy is giving way for new technologies. Likewise, database searching, network and rich site summary, and email alerts which are the commonest of all are yet to be fully embraced. It was revealed that adopting marketing strategies in service delivery has enhanced the image of these libraries and has boosted library professionals’ self actualization. However, challenges such as inadequate skills and lack of funds among others constitute threats to effective use of marketing strategies in library service delivery

Design and parallelisation of a miniature photobioreactor platform for microalgal culture evaluation and optimisation

Miniature photobioreactors (mPBr) represent a potential platform technology for the high-throughput, phototrophic cultivation of microalgae. This work describes the development and characterisation of a novel orbitally shaken twin-well mPBr, and its scale-out to a 24-well microplate format, suitable for optimisation of microalgae culture conditions. Fluid hydrodynamics, oxygen mass transfer coefficient (kLa) and light intensity distribution in the mPBr were first investigated as a function of orbital shaking frequency. High speed video analysis of the shaken wells indicated rapid fluid flow and good mixing while measured kLa values varied between 20 and 80 h−1. Light intensity variation across the scaled-out platform was in the range ±20 μmol m−2 s−1. The use of the mPBr platform was demonstrated for optimisation of conditions for the batch cultivation of Chlorella sorokiniana. Using a modified tris-base phosphate (TBP) medium, the highest biomass concentration and productivity achieved were 9.2 g L−1 and 2.5 ± 0.2 g L−1 d−1 respectively at 5% CO2 with a light intensity of 380 μmol m−2 s−1. In general, cell growth rate and yield increased with increasing shaking frequency (up to 300 rpm) while culture conditions had limited impact on pigment production. Overall, these results demonstrate the application of the mPBr for rapid optimisation of phototrophic culture conditions and establishment of high cell density cultures

A clinico-pathologic review of 56 cases of ossifying fibroma of the jaws with emphasis on the histomorphologic variations

Objective: This study aims at contributing to the definitive diagnosis of ossifying fibroma (OF) based on histomorphological features. The study also aims to determine some demographic features of OF, common sites of occurrence and to determine whether behavior correlates well with the histomorphological variations seen in the lesion.Materials and Methods: A total of 80 patients who were diagnosed either as cementifying fibroma CF, OF and cemento.ossifying fibroma (COF) of the jaws from the files of the Oral Pathology Department of the University of the Witwatersrand Dental School were retrieved and the histology slides of each case were reviewed with the most recent diagnostic criteria for OF and the authors additional criteria. A total of 56 cases that met the set criteria were analyzed.Results: The patients were clustered within the third and fourth decades of life (n = 39, 69.6%). Majority of the patients were black (83.93%), whereas the rest were whites (12.50%) and Asians (3.57%). There were 17 males (30.4%) and 39 females (69.6%), giving a male to female ratio of 1:2.3. Most of the lesions (70.3%) occurred in the mandible, involving the premolar molar region (56.7%). Scanty fibrous tissues in highly cellular lesions were found in 36 (64.3%) of the cases. There were globular, dystrophic or granular calcifications mixed with irregularly shaped trabeculae of lamellar or cellular woven bone or osteoid were found, in 36 (64.3%) cases. Conclusion: Demographic data, clinicoradiologic features, combined with histopathology will continue to be relevantin the definitive diagnosis of OF and in predicting its behavior. Highly aggr essive lesions with shorter duration in people below 15 years  were called juvenile OF and treated as such, while OF applies to other conventional ones.Key words: Clinical-features, histomorphology, jaws, ossifying fibrom

Response to “Dynamic Challenges Inhibiting Optimal Adoption of Kidney Paired Donation: Findings of a Consensus Conference” by Melcher et al.

Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/99040/1/ajt12345.pd

Perovskite solar cells: a deep analysis using current–voltage and capacitance–voltage techniques

Perovskite solar cells exhibiting~14–15% efficiency were experimentally measured using current–voltage (I–V) and capacitance–voltage (C–V) techniques in order to extract material and device properties, and understand the action of photovoltaic (PV) operation. Deep analyses were carried out on dark- and illuminated I–V curves, and dark C–V curves. Results were compared with those of graded bandgap solar cells fabricated on inorganic n-type window layers. These analyses according to a physicist’s point of view lead to understand the perovskite solar cell as a graded bandgap solar cell built on a p-type window layer. I–V and C–V results show very similar behaviour and the principle of PV action is identical. Once the stability issues with perovskites are solved, these devices have very high potential of producing next generation solar cells reaching at least mid-20% efficiency values

Speed Sensorless vector control of parallel-connected three-phase two-motor single-inverter drive system

This paper presents the characteristic behavior of direct vector control of two induction motors with sensorless speed feedback having the same rating parameters, paralleled combination, and supplied from a single current-controlled pulse-width-modulated voltage-source inverter drive. Natural observer design technique is known for its simple construction, which estimates the speed and rotor fluxes. Load torque is estimated by load torque adaptation and the average rotor flux was maintained constant by rotor flux feedback control. The technique’s convergence rate is very fast and is robust to noise and parameter uncertainty. The gain matrix is absent in the natural observer. The rotor speed is estimated from the load torque, stator current, and rotor flux. Under symmetrical load conditions, the difference in speed between two induction motors is reduced by considering the motor parameters as average and difference. Rotor flux is maintained constant by the rotor flux control scheme with feedback, and the estimation of rotor angle is carried out by the direct vector control technique. Both balanced and unbalanced load conditions are investigated for the proposed AC motor drive system. Experimental results presented in this paper show good agreement with the theoretical formulations