SOLAR-POWERED WATER PUMPING SYSTEM FOR CATTLE WATERING IN MUBI CATTLE MARKET

I.U. Haruna¹, W. Ibrahim²

¹ Department of Mechanical Engineering, Federal Polytechnic Mubi, Adamawa State, Nigeria

²Department of Mechanical Engineering Technology, Federal Polytechnic KauraNamoda, Zamfara State

Email: heldabuk@yahoo.com; wadaasy@gmail.com

ABSTRACT

Cattle like other creatures require water supply for survival.The shortage of water supply for cattle in Mubi cattle market is a thing of concern for all and sundry. This inadequate water supply in the cattle market apart from directly affecting the health of the animals, it also affects the cattle marketers from economic standpoint. Instead of relying on the supply of water by water tankers and truck pushers, this paper attempts to design a solar-powered water pumping system for cattle watering in the market. The average daily water requirement by the cattle is obtained from daily number of cows in the market for two years. A deep well jack pump with 75-volt dc motor is used. The worksheet employed in this design reveals that an average pumping rate of 2405 1litres/hr of water can be produced by71 Modules of 917 Watts. This technology can go a long way in addressing the inadequate water supply in the cattle market and in any other cattle market having similar problem.

Keywords: Solar, Pump, Water, Cattle, Worksheet

EFFICIENCY OF ORDINARY LEAST SQUARES IN REGRESSION MODELS WITH AUTOCORRELATED DISTURBANCES IN A CLASSICAL LINEAR STATISTICAL MODEL

Bartholomew A Uchendu; Uzoma Phillip Uche & Duruojinkeya Prisca

Department of Maths/Statistics

Federal Polytechnic, Nekede, Owerri, Nigeria

E-mail: uchendubartholomewahoo.com

ABSTRACT

The illustrative values of the asymptotic efficiency for the selected values of ρ and λ shows that, when ρ and λ are both positive, it is clear that ρ is the dominant parameter. Efficiency declines from 90 percent to about, 10 percent as ρ rises from 0.2 to 0.9, with variations in λ having relatively minor effect. The diagonal entries are equal to those in the first row of table (2) since if λ = 0 or if ρ = λ, the efficiency measure simplified to (1 – ρ²)/(1 + ρ²). Looking at the left hand side of the table, the efficiencies are symmetrical across the first row where the x_t series are random. The remaining rows show that λ now exerts a much stronger effect and that the combination of a positive λ and negative ρ can moderate the dramatic declines in efficiency shown in the right – hand side of the table. These calculations are of course, only illustrative, but, they indicate the possibility of a serious loss in efficiency if Ordinary Least Squares is applied in the context of auto correlated disturbances.

Keywords: Efficiency, Ordinary Least Squares, Auto correlated disturbances.

VORTEX PATTERN OF VARYING REYNOLD’S NUMBER WITH FIXED ASPECT RATIO, AND VICE VERSA IN A LID DRIVEN SQUARE CAVITY

Aliyu A. Baba¹, Bello Zubairu² & Sunday Ayigun³

¹Department of Mechanical Engineering, Federal Polytechnic, Mubi, Adamawa State

  ² Department of Chemical Engineering, Federal Polytechnic, Mubi, Adamawa State

  ³Department of Science Laboratory Technology, Federal Polytechnic, Mubi. Adamawa State

E-mail: adamuldam@yahoo.com; adamuldam@gmail.com

ABSTRACT

The simulation of flow for laminar fluid in lid driven square cavity was conducted by employing a code that run in MATLAB and in the first simulation, a fixed value of the Reynold’s number of 600 was maintained, it was observed from the figures and results that as the aspect ratios were varied (increased) from 0.3, 0.4 and 0.6, the vortex tends to increase in number of streamlines closing the spaces between each other and widening to occupy the bottom right. However, in the second simulation, where the aspect ratio of 0.2 was maintained and varying different Reynolds numbers of 400, 500 and 600, the vortex formed also increases and becoming too close to one another as the Reynold’s number increases, thereby indicating that the pressure coefficient inside the lid square cavity is controlled by the aspect ratio as well as the Reynold’s number.

Keywords: lid driven square cavity, Reynold’s number, Aspect ratio, Vortex.

THEORETICAL INVESTIGATION OF AN IMPACT OF LEFT-HANDED MATERIALS IN SURFACE PLASMON AND PROPAGATION LENGTH

¹E. W. Likta, ²O. W. Olosaji & ²A. M. Tijjani

¹Department of Physics, University of Maiduguri, Maiduguri, Borno State

²Department of Physics, Abubakar Tafawa Balewa University, Bauchi

E-Mail: emmalikta2014@gmail.com

Correspondence: ¹E. W. Likta

ABSTRACT

The goal of this paper is to obtain a theoretical investigation of surface plasmons of geometry. The studied shows the effect of LHM on the surface Plasmon propagation length. A Left-Handed Material layer excite surface plasma with lower energy dissipation rate allow longer propagation distance has been achieved. 

Keywords: Surfaceplasma, LHM layer,Maxwell’s equations, propagation and electric field

ASSESSMENT OF CONTRACTORS’ LEVEL OF COMPLIANCE WITH THE BUILDING INSURANCE POLICY IN JOS PLATEAU STATE

I.M. Oyemogum¹ ;  D. O. Adeagbo ¹  ; F.S. Chindo1 & E.A. Rugu ^{2 1}Department of Building, University of Jos, Jos         

²Department of Quantity Surveying, University of Jos, Jos\

Email:egooye@yahoo.co.uk, adeagbod1@yahoo.com; ruguezekiel@yahoo.com

Corresponding Author: I.M. Oyemogum¹

ABSTRACT

Construction projects are complex, dynamic in nature and executed under varying degrees of risk. In view of the foregoing, the provision of building insurance services is generally considered important.  However, there is a record of non-compliance with the building insurance policy. This study therefore, aims to assess the level compliance with the building insurance policy section 64 with the view of reducing the clients/financiers’ risk. In pursuing this objective, a questionnaire survey was adopted and the data was analysed using descriptive statistics, relative importance index (RII) and weighted average. The findings for the study revealed the major external risk factors in construction to be financing conditions, economic policies and standards. For the internal risk factors the study revealed poor control, errors in construction and design errors/omission. Also, on the level of compliance with the building insurance policy, the study revealed a willingness by contractors to comply with the building insurance policy however, with particular types of projects such as complex and expensive projects.  Further findings of the research show that, raising cost of premiums, high collateral demands by insurance companies, complex policy language and lack of knowledge on insurance are the main challenges hampering compliance with the building insurance policy. The study concludes that contractors are willing to comply with the building insurance policy however, with particular types of projects such as complex, expensive and unfamiliar projects. The study recommends that the insurance policy be review to cover for complex, expensive and unfamiliar projects, also to make building insurance policy a compulsory requirement for contract documents and education of key stakeholders.