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Articles 1 - 30 of 855
Full-Text Articles in Physical Sciences and Mathematics
Minerva 2010, The Honors College
Minerva 2010, The Honors College
Minerva
This issue of Minerva celebrates the 75th anniversary of Honors at the University of Maine! It includes an article on the college's 75th anniversary celebration; a look into the inaugural Center for Undergraduate Research (CUGR) symposium; and discussions on 2010 Honors Read, Persepolis, as well as 2011 Honors Read, The Omnivore's Dilemma. Other highlights include an article on Honors graduate and historian, Kristen Gwinn, and her book Emily Greene Balch: The Long Road to Internationalism.
On The Perfection Of Broccoli: Talking To Ed Brush, Lee Torda
On The Perfection Of Broccoli: Talking To Ed Brush, Lee Torda
Bridgewater Review
No abstract provided.
Oil And Gas Management In Nigeria: Lessons For Ghana, Omolara O. Akanji Mrs.
Oil And Gas Management In Nigeria: Lessons For Ghana, Omolara O. Akanji Mrs.
Bullion
This paper is to discuss the oil and gas management in Nigeria: Lessons for Ghana. The paper is structured into five parts with part 1 being the introduction while part 2 scoops the literature on the economics of natural resources and its management globally. Part 3 will situate the Nigeria's multifaceted crisis of oil and gas governance and all related issues. Part 4 will sieve out the lessons for Ghana while part 5 summarizes and concludes the paper.
Optimal Designs Approach To Portfolio Selection, Etukudo A. I.
Optimal Designs Approach To Portfolio Selection, Etukudo A. I.
CBN Journal of Applied Statistics (JAS)
In order to obtain the best tradeoff between risk and return, optimization algorithms are particularly useful in asset allocation in a portfolio mix. Such algorithms and proper solution techniques are very essential to investors in order to circumvent distress in business outfits. In this paper, we show that by minimizing the total variance of the portfolio involving stocks in two Nigerian banks which is a measure of risk, optimal allocation of investible funds to the portfolio mix is obtained. A completely new solution technique – modified super convergent line series algorithm which makes use of the principles of optimal designs …
Relationship Between Inflation And Stock Market Returns: Evidence From Nigeria, Omotor G. Douglason
Relationship Between Inflation And Stock Market Returns: Evidence From Nigeria, Omotor G. Douglason
CBN Journal of Applied Statistics (JAS)
The linkage between stock prices and inflation has been subjected to extensive research in the past decades and has arouse the interests of academics, researchers, practitioners and policy makers globally, particularly since the 1990s. The issue has been the apparent anomaly of the negative relationship between inflation and stock market returns as most studies in the industrialized economies have shown. This paper investigates this relationship using monthly and quarterly data of Nigeria for the period 1985 to 2008. The findings of this paper seem to suggest that stock market returns may provide an effective hedge against inflation in Nigeria.
Statistics For National Development, Sani I. Doguwa
Statistics For National Development, Sani I. Doguwa
CBN Journal of Applied Statistics (JAS)
Good statistics that has been collected according to agreed good practices are crucial as a tool for development. Gross domestic product (GDP) and other measures of economic activity such as Gross National Income (GNI) together with their individual components, show how the economy is responding to government policy and other influences. The balance of payments can demonstrate the requirement for policy adjustments and is also one of the indicators scrutinised by potential foreign investors in the country. Agricultural statistics clearly have implications for longer-term planning, particularly if they show a move away from the land into urban areas or a …
Monetary And Fiscal Policy Interactions In Nigeria: An Application Of A State-Space Model With Markov-Switching, Chuku V. Chuku
Monetary And Fiscal Policy Interactions In Nigeria: An Application Of A State-Space Model With Markov-Switching, Chuku V. Chuku
CBN Journal of Applied Statistics (JAS)
This paper uses quarterly data to explore the monetary and fiscal policy interactions in Nigeria between 1970 and 2008. As a preliminary exercise, the paper examines the nature of fiscal policies in Nigeria using a vector autoregression (VAR) model. The simulated generalized impulse response graphs generated from the VAR estimation provides evidence of a non-Ricardian fiscal policy in Nigeria. Further, the paper analyzes the interactions between monetary and fiscal policies by applying a State-space model with Markov-switching to estimate the time-varying parameters of the relationship. The evidence indicates that monetary and fiscal policies in Nigeria have interacted in a counteractive …
Is The Stock Market A Leading Indicator Of Economic Activity In Nigeria?, Alvan E. Ikoku
Is The Stock Market A Leading Indicator Of Economic Activity In Nigeria?, Alvan E. Ikoku
CBN Journal of Applied Statistics (JAS)
In an effort to address the lacuna in leading indicator studies of African economies and Nigeria in particular, this paper examines the causal relationships among stock market prices, real GDP and the index of industrial production in Nigeria, using quarterly data from 1984Q1 to 2008Q4. Granger causality tests indicate bidirectional causality between stock prices and GDP but no causality between stock prices and industrial production or between GDP and industrial production. Stock prices and GDP are found to be cointegrated, leading to the estimation of vector error correction models. Out-of-sample forecasts constructed with AR(1), ARIMA, structural ARIMA, and VEC models …
Factors, Preventions And Correction Methods For Non-Response In Sample Surveys, Godwin Nwanzu Amahi
Factors, Preventions And Correction Methods For Non-Response In Sample Surveys, Godwin Nwanzu Amahi
CBN Journal of Applied Statistics (JAS)
Missing survey data occur because of unit and item non-response. This is practically independent of the method of data collection. As a result of the bias that non-response sometimes introduces in survey estimates, identifying factors that promote it, and taking measures of prevention and correction methods are clearly necessary. The standard method to compensate for unit non-response is by weighting adjustment, while item non-responses are handled by some form of imputation. This paper reviews factors that give rise to nonresponse and the corresponding methods used for its prevention and control. It also discusses their properties.
Addressing The Problem Of Non-Response And Response Bias, Fabian C. Okafor
Addressing The Problem Of Non-Response And Response Bias, Fabian C. Okafor
CBN Journal of Applied Statistics (JAS)
Survey planners and analysts in Nigeria have devoted much more attention to sampling errors at the expense of nonsampling errors (non-response and response errors). Sampling error is the degree to which the sample estimate differs from the average value of the characteristic due to chance. The present discussion will be centered on non-sampling error, which may present serious deficiencies in the statistics and render the survey useless. According to Platek and Gray (1986), “Non-response has been generally recognized as important measure of the quality of data since it affects the estimates by introducing a possible bias in the estimates and …
New Exact Solutions Of Some Nonlinear Partial Differential Equations By The First Integral Method, Nasir Taghizadeh, Mohammad Mirzazadeh, Foroozan Farahrooz
New Exact Solutions Of Some Nonlinear Partial Differential Equations By The First Integral Method, Nasir Taghizadeh, Mohammad Mirzazadeh, Foroozan Farahrooz
Applications and Applied Mathematics: An International Journal (AAM)
The first integral method is an efficient method for obtaining exact solutions of nonlinear partial differential equations. The efficiency of the method is demonstrated by applying it for two selected equations. This method can be applied to nonintegrable equations as well as to integrable ones.
A Multivariate Latent Variable Model For Mixed – Data From Continuous And Ordinal Responses With Possibility Of Missing Responses, Ehsan B. Samani, M. Ganjali
A Multivariate Latent Variable Model For Mixed – Data From Continuous And Ordinal Responses With Possibility Of Missing Responses, Ehsan B. Samani, M. Ganjali
Applications and Applied Mathematics: An International Journal (AAM)
A joint model for multivariate mixed ordinal and continuous outcomes with potentially non-random missing values in both types of responses is proposed. A full likelihood-based approach is used to obtain maximum likelihood estimates of the model parameters. Some modified Pearson residuals are also introduced where the correlation between responses are taken into account. The joint modelling of responses with the possibility of missing values requires caution since the interpretation of the fitted model highly depends on the missing mechanism assumptions that are unexaminable in a fundamental sense. A common way to investigate the influence of perturbations of model components on …
Optimal Correction Of Infeasible System In Linear Equality Via Genetic Algorithm, S. Ketabchi, H. Moosaei, S. Fallahi
Optimal Correction Of Infeasible System In Linear Equality Via Genetic Algorithm, S. Ketabchi, H. Moosaei, S. Fallahi
Applications and Applied Mathematics: An International Journal (AAM)
This work is focused on the optimal correction of infeasible system of linear equality. In this paper, for correcting this system, we will make the changes just in the coefficient matrix by using l norm and show that solving this problem is equivalent to solving a fractional quadratic problem. To solve this problem, we use the genetic algorithm. Some examples are provided to illustrate the efficiency and validity of the proposed method.
Solving Fuzzy Linear Programming Problems With Piecewise Linear Membership Function, S. Effati, H. Abbasiyan
Solving Fuzzy Linear Programming Problems With Piecewise Linear Membership Function, S. Effati, H. Abbasiyan
Applications and Applied Mathematics: An International Journal (AAM)
In this paper, we concentrate on linear programming problems in which both the right-hand side and the technological coefficients are fuzzy numbers. We consider here only the case of fuzzy numbers with linear membership functions. The symmetric method of Bellman and Zadeh (1970) is used for a defuzzification of these problems. The crisp problems obtained after the defuzzification are non-linear and even non-convex in general. We propose here the "modified subgradient method" and "method of feasible directions" and uses for solving these problems see Bazaraa (1993). We also compare the new proposed methods with well known "fuzzy decisive set method". …
The Combined Effect Of Chemical Reaction, Radiation, Mhd On Mixed Convection Heat And Mass Transfer Along A Vertical Moving Surface, Navneet Joshi, Manoj Kumar
The Combined Effect Of Chemical Reaction, Radiation, Mhd On Mixed Convection Heat And Mass Transfer Along A Vertical Moving Surface, Navneet Joshi, Manoj Kumar
Applications and Applied Mathematics: An International Journal (AAM)
This paper discusses the effect of Chemical reaction, Radiation and MHD on laminar mixed convection boundary layer flow and heat and mass transfer on continuously moving vertical surface. The fluid viscosity is assumed to vary as an inverse linear function of temperature and local similarity solutions are obtained for the boundary layer equations subject to isothermally moving vertical surface with uniform speed. The system of non-linear partial differential equations developed in the process is finally transformed into a set of ordinary differential equations with the help of similarity transformations involved in the problem. This set of equations is for different …
Legal Research In An Electronic Age: Electronic Data Discovery, A Litigation Albatross Of Gigantic Proportions, Ahunanya Anga
Legal Research In An Electronic Age: Electronic Data Discovery, A Litigation Albatross Of Gigantic Proportions, Ahunanya Anga
The University of New Hampshire Law Review
[Excerpt] “The increase in e-discovery, e-discovery‘s impact on litigation, and the courts‘ unavoidable role in defining the limits of discovery led to the author‘s decision to develop this article. The availability, accessibility, and the ease of requesting electronic data, resulting in increased e-discovery under the Federal Rules of Civil Procedure, is an important issue that will affect the legal profession and its constituents in many ways for years to come. Part II of this article is an overview of Federal Rule of Civil Procedure 26(f). This part stresses that in recognizing the herculean task involved in e-discovery, courts expect that …
On The Characteristic Function Of Random Variables Associated With Boson Lie Algebras, Luigi Accardi, Andreas Boukas
On The Characteristic Function Of Random Variables Associated With Boson Lie Algebras, Luigi Accardi, Andreas Boukas
Communications on Stochastic Analysis
No abstract provided.
Cosine And Gaussian Transforms, Carlos Lizama, Rolando Rebolledo
Cosine And Gaussian Transforms, Carlos Lizama, Rolando Rebolledo
Communications on Stochastic Analysis
No abstract provided.
Markov Chains And Dynamical Systems: The Open System Point Of View, Stéphane Attal
Markov Chains And Dynamical Systems: The Open System Point Of View, Stéphane Attal
Communications on Stochastic Analysis
No abstract provided.
Characterization Of Unitary Processes With Independent Increments, Un Cig Ji, Lingaraj Sahu, Kalyan B Sinha
Characterization Of Unitary Processes With Independent Increments, Un Cig Ji, Lingaraj Sahu, Kalyan B Sinha
Communications on Stochastic Analysis
No abstract provided.
How To Differentiate A Quantum Stochastic Cocycle, J Martin Lindsay
How To Differentiate A Quantum Stochastic Cocycle, J Martin Lindsay
Communications on Stochastic Analysis
No abstract provided.
Robin Hudson's Pathless Path To Quantum Stochastic Calculus, David Applebaum
Robin Hudson's Pathless Path To Quantum Stochastic Calculus, David Applebaum
Communications on Stochastic Analysis
No abstract provided.
Quantum Filtering In Coherent States, John E Gough, Claus Köstler
Quantum Filtering In Coherent States, John E Gough, Claus Köstler
Communications on Stochastic Analysis
No abstract provided.
E-Semigroups Subordinate To Ccr Flows, Stephen J Wills
E-Semigroups Subordinate To Ccr Flows, Stephen J Wills
Communications on Stochastic Analysis
No abstract provided.
Transformation Of Quantum Lévy Processes On Hopf Algebras, Michael Schürmann, Michael Skeide, Silvia Volkwardt
Transformation Of Quantum Lévy Processes On Hopf Algebras, Michael Schürmann, Michael Skeide, Silvia Volkwardt
Communications on Stochastic Analysis
No abstract provided.
Quantum Quasi-Markov Processes, L-Dynamics, And Noncommutative Girsanov Transformation, V P Belavkin
Quantum Quasi-Markov Processes, L-Dynamics, And Noncommutative Girsanov Transformation, V P Belavkin
Communications on Stochastic Analysis
No abstract provided.