Physical Sciences and Mathematics Commons^™

The Overhaul Of U.S. Patent Law, Ron D. Katznelson

Ron D. Katznelson

No abstract provided.

Admissibility For Monomial Representations Of Exponential Lie Groups, Vignon Oussa

Vignon Oussa

No abstract provided.

Assessment Of Organic And Inorganic Phosphorus In Soils Derived From Cretaceous Sediments And Basement Complex Soils Of Guinea Savannah Of Kogi State, North Central Nigeria, Sunday I. Amhakhian, H H. Isitekhale, Charles I. Oyewole

Confluence Journal Environmental Studies (CJES), Kogi State University, Nigeria

A pot experiment was carried out using 20 surface soils (0-15cm depth) in 2008 to assess soil organic phosphorus and some fraction of inorganic phosphorus in other to know their availability in the soils of the studied area and also work have not been done in this areas in respect to organic and in-organic phosphorus. The experiment was conducted using 20 soils 10 from each geological formation (Cretaceous sediments and Basement complex soils), respectively. The mean organic phosphorus of 63.51 mgkg 1 soil was obtained for Cretaceous sediment soils and 158.54 mgkg 1 soil for the basement complex soils respectively. …

Development Of Functional Indices Of Facility Occurrence Towards The Distribution Of Social Services In Lagos Island Nigeria., Augustus O. Atubi

Confluence Journal Environmental Studies (CJES), Kogi State University, Nigeria

Proper coordination of transport and public facilities provision is vital to any balanced regional development strategy. The central aim of this study, therefore, is to find out what the relationship is between access to the transport network and the provision of functional indices of facility occurrence towards the distribution of social services in Lagos Island, Nigeria. In particular it seeks to find out areas that have below or above average level of facility occurrences relative to the level of accessibility. However, a pair wise correlation matrix of the eleven (11) variables employed in the index construction was carried out. The …

Basic R Matrix Operations, Joseph Hilbe

Joseph M Hilbe

No abstract provided.

Increasing Role Of Large Reservoirs In Sustaining Urban Water Supplies In India, Sacchidananda Mukherjee

Sacchidananda Mukherjee

Conference: 2011 World Water Week in Stockholm Duration: August 21-27, 2011 Venue: Stockholm International Fair, Stockholm, Sweden Organizer: Stockholm International Water Institute (SIWI) Theme: Responding to Global Changes: Water in an Urbanising World Workshop 5 (sub-theme): Water for Sustainable Urban Growth For abstract go to Page No. 185 at the Conference Abstract Volume Download from the following link: http://www.worldwaterweek.org/documents/Resources/Synthesis/Abstract-Volume-2011.pdf

Design Optimization Of An Lpg Thermal Cracker For Multiple Objectives, Reza Nabavi, G.P Rangaiah, A Niaei, D Salari

Seyed Reza nabavi

Ethylene and propylene, building blocks of the petrochemical industries, are mostly produced by steam cracking of hydrocarbons. In our recent work (Nabavi, Rangaiah, Niaei and Salari, Multiobjective Optimization of an Industrial LPG Thermal Cracker using a First Principles Model, Ind. Eng. Chem. Res. 2009, 48, 9523-9533), operation of an industrial liquefied petroleum gas (LPG) cracker was optimized for several sets of two and three objectives. In this work, optimization of an LPG cracker design is investigated for multiple objectives. The objectives considered are maximization of annual ethylene and propylene production, selectivity and run length, and minimization of severity and total …

Testing For Weak Form Market Efficiency In Indian Foreign Exchange Makret, Anoop Sasikumar

Anoop Sasikumar

This paper attempts to examine the weak form of market efficiency in the Indian foreign exchange market using a family of variance ratio tests. Monthly Nominal Effective Exchange Rate (NEER) data from April 1993-June 2010 were used for the analysis. NEER series was considered for the analysis as it is supposed to capture more information compared to the bilateral exchange rates. Three individual variance ratio tests as well as three joint variance ratio tests were used for the purpose of analysis. After analyzing the results from both individual and joint variance ratio test, it was concluded that Indian foreign exchange …

The Explosion In Mari, Cyprus, The Cost Of Power Shortages, And Policy Recommendations, Theodoros Zachariadis, Panos Pashardes, Nicoletta Pashourtidou

Theodoros Zachariadis

No abstract provided.

Concentration Oscillations In The Processes Of Unsaturated Compounds Oxidative Carbonylation. 1. Processes Of Acetylene And Phenylacetylene Oxidative Carbonylation (In Russian), Sergey N. Gorodsky, Katarina Novakovic

Sergey N. Gorodsky

This review describes the processes of oxidative carbonylation of acetylene and phenylacetylene, occurring in the oscillatory mode under conditions of homogeneous catalysis by palladium complexes.

Analytical Solutions For Nonlinear Lateral Sloshing In Partiallyfilled Elliptical Tankers, Hassan Askari

No abstract provided.

Identifying Unique Neighborhood Characteristics To Guide Health Planning For Stroke And Heart Attack: Fuzzy Cluster And Discriminant Analyses Approaches, Ashley Pedigo, William Seaver, Agricola Odoi

Agricola Odoi

Background: Socioeconomic, demographic, and geographic factors are known determinants of stroke and myocardial infarction (MI) risk. Clustering of these factors in neighborhoods needs to be taken into consideration during planning, prioritization and implementation of health programs intended to reduce disparities. Given the complex and multidimensional nature of these factors, multivariate methods are needed to identify neighborhood clusters of these determinants so as to better understand the unique neighborhood profiles. This information is critical for evidence-based health planning and service provision. Therefore, this study used a robust multivariate approach to classify neighborhoods and identify their socio-demographic characteristics so as to provide …

The Use Of Imputed Values In The Meta-Analysis Of Genome-Wide Association Studies., Shuo Jiao, Li Hsu, Carolyn Hutter, Ulrike Peters

Shuo Jiao

In genome-wide association studies (GWAS), it is a common practice to impute the genotypes of untyped single nucleotide polymorphism (SNP) by exploiting the linkage disequilibrium structure among SNPs. The use of imputed genotypes improves genome coverage and makes it possible to perform meta-analysis combining results from studies genotyped on different platforms. A popular way of using imputed data is the "expectation-substitution" method, which treats the imputed dosage as if it were the true genotype. In current practice, the estimates given by the expectation-substitution method are usually combined using inverse variance weighting (IVM) scheme in meta-analysis. However, the IVM is not …

Meta-Analysis Of New Genome-Wide Association Studies Of Colorectal Cancer Risk.

Shuo Jiao

Colorectal cancer is the second leading cause of cancer death in developed countries. Genome-wide association studies (GWAS) have successfully identified novel susceptibility loci for colorectal cancer. To follow up on these findings, and try to identify novel colorectal cancer susceptibility loci, we present results for GWAS of colorectal cancer (2,906 cases, 3,416 controls) that have not previously published main associations. Specifically, we calculated odds ratios and 95% confidence intervals using log-additive models for each study. In order to improve our power to detect novel colorectal cancer susceptibility loci, we performed a meta-analysis combining the results across studies. We selected the …

Urban Climate And Challenges Of Tropical Cities, B E. Omogbai

Confluence Journal Environmental Studies (CJES), Kogi State University, Nigeria

This study examines the nature of urban climate, features and the challenges on the developing tropical cities in the 21st century. It argues that the use of principles of urban climate would help in providing comfortable living conditions and problem immune working environments for the inhabitants of tropical cities. The findings reveal that owing to poor environmental planning, inadequate geotechnical landscape surveys prior to the development of urban infrastructures, and non-adherence to the principles of urban climate, challenges of landscape degradation, excessive flooding of the built infrastructures, heat-island effects, and collapse of buildings have emerged. Suggested measures to avert these …

Inequality, Communication And The Avoidance Of Disastrous Climate Change In A Public Goods Game, Alessandro Tavoni, Astrid Dannenberg, Giorgos Kallis, Andreas Loeschel

Alessandro Tavoni

International efforts to provide global public goods often face the challenges of coordinating national contributions and distributing costs equitably in the face of uncertainty, inequality, and free-riding incentives. In an experimental setting, we distribute endowments unequally among a group of people who can reach a fixed target sum through successive money contributions, knowing that if they fail they will lose all their remaining money with 50% probability. In some treatments we give players the option to communicate intended contributions. We find that inequality reduces the prospects of reaching the target, but that communication increases success dramatically. Successful groups tend to …

A New Approach For Solving Of Linear Time Varying Control Systems, Ali Vahidian Kamyad, Mehran Mazandarani

Mehran Mazandarani

This paper is concerned with the solution of Linear Time Varying [LTV] control systems. The concept of a solution for LTV systems is defined on the basis of finding the fundamental matrix corresponding to LTV control systems. There are some numerical methods such as Euler method and Taylor method for obtaining approximate solution of LTV system [LTVs], each of them has some limitations. In the recent years, other kinds of constructive approaches for the solution of LTVs are presented limited to the particular cases of it. In this paper, we introduced a new approach that we call it AVK approach …

Using R To Create Synthetic Discrete Response Regression Models, Joseph Hilbe

Joseph M Hilbe

The creation of synthetic models allows a researcher to better understand models as well as the bias that can occur when the assumptions upon which a model is based is violated. This article provides R code that can be used or amended to create a variety of discrete response regression models.

Effect Of Climate Variability And Climate Change On Crop Production And Water Resources In Cyprus, Adriana Bruggeman, Christos Zoumides, Stelios Pashiardis, Panos Hadjinicolaou, Manfred Lange, Theodoros Zachariadis

Theodoros Zachariadis

No abstract provided.

Detecting Changes In Landuse/Cover Of Umuahia, South-Eastern Nigeria Using Remote Sensing And Gis Techniques, Fanan Ujoh, Olarewaju Oluseyi Ifatimehin, Adams Ndalai Baba

Confluence Journal Environmental Studies (CJES), Kogi State University, Nigeria

Since 1991 when it became the capital city of Abia State, Umuahia has undergone tremendous transformation in its land use and land cover due to rapid urbanization. The main materials employed for this study are a land use map (1991) and Landsat ETM+satellite image (2007) of the study area. These, combined with field survey/checks, were brought into a GIS environment using ILWIS 3.2 Academic image classification software to map the land use/land cover and to estimate the rate of urban expansion and loss of rural land at the peri-urban fringes of Umuahia between 1991 and 2007. The study revealed significant …

The M81 Group Dwarf Irregular Galaxy Ddo165. Ii. Connecting Recent Star Formation With Ism Structures And Kinematics, John M. Cannon, Hans P. Most, Evan D. Skillman, Daniel R. Weisz, David Cook, Andrew E. Dolphin, Robert C. Kennicutt, Jr., Janice Lee, Anil Seth, Fabian Walter, Steven R. Warren

John Cannon

No abstract provided.

Finite-State Markov Chains Obey Benford’S Law, Arno Berger, Theodore P. Hill, Bahar Kaynar, Ad Ridder

Theodore P. Hill

A sequence of real numbers (xn) is Benford if the significands, i.e., the fraction parts in the floating-point representation of (xn), are distributed logarithmically. Similarly, a discrete-time irreducible and aperiodic finite-state Markov chain with transition probability matrix P and limiting matrix P* is Benford if every component of both sequences of matrices (Pn−P*) and (Pn+1−Pn) is Benford or eventually zero. Using recent tools that established Benford behavior for finite-dimensional linear maps, via the classical theories of uniform distribution modulo 1 and Perron–Frobenius, this paper derives a simple sufficient condition (“nonresonance”) guaranteeing that P, or the Markov chain associated with it, …

Applications Of Local Fractional Calculus To Engineering In Fractal Time-Space: Local Fractional Differential Equations With Local Fractional Derivative, Yang Xiao-Jun

Xiao-Jun Yang

This paper presents a better approach to model an engineering problem in fractal-time space based on local fractional calculus. Some examples are given to elucidate to establish governing equations with local fractional derivative.

A Short Introduction To Local Fractional Complex Analysis, Yang Xiao-Jun

Xiao-Jun Yang

This paper presents a short introduction to local fractional complex analysis. The generalized local fractional complex integral formulas, Yang-Taylor series and local fractional Laurent’s series of complex functions in complex fractal space, and generalized residue theorems are investigated.

Cavitation Modelling Based On Eulerian-Eulerian Multiphase Flow, Rachid Bannari Ph.D

Rachid BANNARI

Cavitation is a physical phenomenon encountered in the normal operation of hydraulic turbines. It can lead to loss in efficiency, vibrations and blade erosion damages. It is crucial to accurately predict cavitation development and evolution to make confident predictive results for hydraulic turbines in a cavitating regime. The cavity closure is a critical region that is characterized by its unsteady and unstable behavior. In this region, liquid and vapor are highly mixed and experienced a strong interaction between the cavity and the outer flow. Most of the published work is based on the mixture multiphase model. An important limitation of …

Gender Participation In The Management Of Tricycle Transport For Youth Empowerment And Sustainable Development In Kano State, Nigeria, Nuratu Muhammed

Confluence Journal Environmental Studies (CJES), Kogi State University, Nigeria

The research examined gender participation in the management of tricycle for youth empowerment and sustainable development in Kano state, Nigeria. Stratified random sampling technique was used to select samples of drivers(150), passengers (150) and owners/managers the female tricycle owners fell under this category and they numbered(65).All together a total of 365 samples were selected for the study. Data obtained from the primary data was analyzed using simple statistical techniques and chi square test to ascertain whether there was any significant differences in some of the variables tested. The results of the analysis revealed that the main difference was found in …

Modelling Of The Adsorption‐Catalytic Processes In The Multi‐Dispersed Bed, Sergey V. Zazhigalov, Natali A. Chumakova, Andrey N. Zagoruiko

Andrey N Zagoruiko

The simulation work is dedicated to the multidispersed adsorption-catalytic packing, consisting of comparatively large pellets (say, 5-10 mm) of the catalyst-adsorbent and of catalytically active micro-fibers with typical thickness of ~10 microns. During the heating at the regeneration stage the micro-fiber catalyst must be heated much more rapidly than adsorbent-catalyst, due to the much higher unit outer surface area improving the heat exchange. When the adsorbent-catalyst temperature is becoming high enough for partial desorption of chemisorbed VOC, the temperature of the micro-fibrous catalyst will be already as high as necessary one for complete oxidation of desorbed VOCs. This theoretical concept …

Process Of Combined Oxidation Of Co And So2 In Waste Gases Of Non‐Ferrous Smelters At Platinum Glass‐Fiber Catalyst, Sergey V. Vanag, Andrey N. Zagoruiko

Andrey N Zagoruiko

The work is dedicated to the development of the efficient catalyst for the oxidation of CO in presence of significant amounts of SO2. It was experimentally shown that the Pt/Zr-Si glas-fiber-based catalyst is capable to provide complete CO conversion in SO2 presence at temperatures less 300 С, at the same time showing high resistance to deactivation. Application of such catalyst in the reverse-process will allow to raise essentially efficiency of purification of waste metallurgical gases from SO2 under presence of significant amounts (up to 1-2% vol.) of CO.

A New Viewpoint To The Discrete Approximation: Discrete Yang-Fourier Transforms Of Discrete-Time Fractal Signal, Yang Xiao-Jun

Xiao-Jun Yang

It is suggest that a new fractal model for the Yang-Fourier transforms of discrete approximation based on local fractional calculus and the Discrete Yang-Fourier transforms are investigated in detail.

U.S. Cultural Involvement And Its Association With Co-Occurring Substance Abuse And Sexual Risk Behaviors Among Youth In The Dominican Republic, Elián P. Cabrera-Nguyen, Juan B. Peña

Elián P. Cabrera-Nguyen

We examined the relationship of US cultural involvement with substance abuse and sexual risk behavior profiles from our nationally representative sample of public high school students in the Dominican Republic. Using a novel methodological approach to control for selection bias, we examined explanations for the so-called Latino or Hispanic immigrant paradox. A latent class regression analysis with manifest and latent covariates found that US cultural involvement indicators were independent and robust predictors of increased risk of co-ocurring substance abuse and sexual risk behaviors. Implications for prevention efforts targeting risk behaviors among Latino/a adolescents in the US and abroad are considered.