Determination of Aquifer Characteristics in Okija, Anambra State, Nigeria

Knowledge of hydraulic properties of groundwater aids economic and environmentally friendly exploitation of water resources in water-scare rural area such as Okija. In this study therefore, the aquifer constants are evaluated for Okija town in Ihiala Local Government Area of Anambra State, Nigeria to facilitate efficient and effective exploitation of the water resources in the area. The drawdown test involved pumping down the water level and monitoring the response of hydraulic head in the surrounding aquifer. The computation of formation constants is performed in three ways: Theis method, Cooper-Jacob method and Chow method. Model Selection Criterion (MSC was used to evaluate the discharge predictions from the three methods. The results show that transmissivity and storage coefficient for Theis method are 256. 37 m2/day and 146.67 m2/day; Cooper-Jacob method are 251.71 m2/day and 131 m2/day, and chow method are 2 67.87 m2/day and 146.67 m2/day respectively. This work represents a practical and novel approach to the determination of a key hydrogeological parameter for a highly transmissive aquifer. Keywords—.Aquifer constants, Theis method, Cooper-Jacob method, Chow method, Okij

Inverse Mapping of Polarised Optical Emission from Pulsars : Basic Formulation and Determination of Emission Altitude

We present an inverse mapping approach to determining the emission height of the optical photons from pulsars, which is directly constrained by empirical data. The model discussed is for the case of the Crab pulsar. Our method, using the optical Stokes parameters, determines the most likely geometry for emission including magnetic field inclination angle ($\alpha$), observers line of sight angle ($\chi$) and emission height. We discuss the computational implementation of the approach, along with any physical assumptions made. We find that the most likely emission altitude is at 20% of the light cylinder radius above the stellar surface, in the open field region. We also present a general treatment of the expected polarisation from synchrotron source with a truncated power law spectrum of particles.Comment: 17 pages 16 figures; accepted for publication in MNRA

Analisis Kemampuan Ekonomi Rumah Tangga Petani Karet di Sumatera Selatan

Issue of this research is: (1) There is factors influence applied to forming of capital for rejuvenation of rubber plantation, (2) Does farmer have allocation ability of the earnings to forming of capital for rejuvenation of rubber plantation, (3) Does the residue of earnings that is not consumed (real saving) can be applied to forming of capital for rejuvenation of rubber plantation, (4) Is there is source of other business to add earnings of farmer to forming of capital for rejuvenation of rubber plantation. Analytical method used is regression and hypothesis test. The result of this research is: (1) Partially, household earning, residue of earnings that is not consumed (real saving), formal education of farmer, old worked as farmer, and rubber plantation wide variable have positive and significance effects to forming of capital for rejuvenation of rubber plantation, (2) Partially, household expenditure variable have negative and significance effects for forming of capital to forming of capital for rejuvenation of rubber plantation, and (3) Partially, sum of member of adult families and ownership status of rubber plantation variable have no significance effects to forming of capital for rejuvenation of rubber plantation

Book Reviews

Reviews of the following books: Up River: The Story of a Maine Fishing Community by Olive Pierce; Yankee Correspondence: Civil War Letters Between New England and the Home Front edited by Nine Silber and Mary Beth Stevens

Chiral Transition of N=4 Super Yang-Mills with Flavor on a 3-Sphere

We use the AdS/CFT correspondence to perform a numerical study of a phase transition in strongly-coupled large-Nc N = 4 Super-Yang-Mills theory on a 3-sphere coupled to a finite number Nf of massive N = 2 hypermultiplets in the fundamental representation of the gauge group. The gravity dual system is a number Nf of probe D7-branes embedded in AdS_5 x S^5. We draw the phase diagram for this theory in the plane of hypermultiplet mass versus temperature and identify for temperatures above the Hawking-Page deconfinement temperature a first-order phase transition line across which the chiral condensate jumps discontinuously.Comment: 23 pages, 15 figures, minor corrections, reference added, nine figures improved, no change in results or conclusions; expanded discussion of fixing finite counterterms in section 3.3, figures updated, no changes to conclusion

Future energy

Energy resources have been a major focus for BGS over our 175 year history. In the past, our geologists searched for coal to keep the UK supplied with energy crucial for economic development. Coal mining subsequently declined and by the 1980s we were studying abandoned mines to try and resolve problems of subsidence, flooding as the dewatering pumps were switched off, and contaminated water discharging into rivers. More recently we have returned to our geological maps and archives of coal mine plans with a new energy source in mind — geothermal energy

Pre-K in Texas: A Critical Component for Academic Success

With funding from the Meadows Foundation and the Miles Foundation, researchers at CHILDREN AT RISK engaged in a study to examine how participation in Texas public PreKindergarten Pre-K1 is associated with performance on the 3rd Grade State of Texas Assessment of Academic Readiness (STAAR) Reading assessment. CHILDREN AT RISK tracked approximately 47,000 students from the 2010-2011 school year to the 2014-2015 school year.2 These students began public Pre-K in 2010 and completed 3rd grade in 2015. The study focused on five major independent school districts (ISD) in Texas (Austin ISD, Dallas ISD, Fort Worth ISD, Houston ISD, and San Antonio ISD) and 12 additional school districts surrounding these major metropolitan areas.3 The purpose of this report is twofold. The first purpose is to educate parents, policy makers, and the public about the association between Texas public Pre-K and 3rd grade STAAR Reading outcomes. Across campuses and students, this study examines the relationship between varying levels of public Pre-K participation and STAAR Reading scores by comparing 3rd grade STAAR Reading means among multiple sub-groups of economically disadvantaged students. The second purpose is to offer policy recommendations that will increase access to and improve the quality of the Texas public Pre-K program on behalf of parents, taxpayers, and—most importantly—children