Digital Commons Network^™

A Structure-Preserving Modified Exponential Method For The Fisher–Kolmogorov Equation, Jorge E. Macıas-Dıaz, Stefania Tomasiello

Applied Mathematics & Information Sciences

In this work, we propose an exponential-type discretization of the well-known Fisher’s equation from population dynamics. Only non-negative, bounded and monotone solutions are physically relevant in this note, and the discretization that we provide is able to preserve these properties. The method is a modified explicit exponential technique which has the advantage of requiring a small amount of computational resources and computer time. It is worthwhile to notice that our technique has the advantage over other exponentiallike methodologies that it yields no singularities. In addition, the preservation of the properties of non-negativity, boundedness and monotonicity are distinctive features of our …

Steady Thermosolutocapillary Instability In Fluid Layer With Nondeformable Free Surface In The Presence Of Insoluble Surfactant And Gravity, Razihan Allias, Mohd Agos Salim Nasir, Seripah Awang Kechil

Applied Mathematics & Information Sciences

Steady thermosolutocapillary instabilities in a horizontal thin fluid layer with deformable free surface and uniform temperature at the bottom boundary in the presence of insoluble surfactant and gravity force are examined. The surface tension at the free surface is assumed to be linearly dependent on temperature and concentration gradients. The linear stability theory and the Galerkin method are used to obtain the closed form solutions. The effects of the controlling parameters, namely the Rayleigh number, Biot number, Lewis number, and elasticity parameter on the onset of Marangoni convection are analyzed. The results show that the gravitational force acts as destabilizer …

Analysis Of Statistical And Structural Properties Of Complex Networks With Random Networks, S. Vairachilai, M. K. Kavitha Devi, M. Raja

Applied Mathematics & Information Sciences

Random graphs are extensive, in addition, it is used in several functional areas of research, particularly in the field of complex networks. The study of complex networks is a useful and active research areas in science, such as electrical power grids and telecommunication networks, collaboration and citation networks of scientists,protein interaction networks, World-Wide Web and Internet Social networks, etc. A social network is a graph in which n vertices and m edges are selected at random, the vertices represent people and the edges represent relationships between them. In network analysis, the number of properties is defined and studied in the …

On The Distribution Of The Ratio Of Two Hyper-Erlang Random Variables, Therrar Kadri, Khaled Smaili, Seifedine Kadry

Applied Mathematics & Information Sciences

The distribution of ratio of two random variables has been studied by several authors especially when the two random variables are independent and come from the same family. In this paper, the exact distribution of the ratio of two independent Hyper- Erlang distribution is derived. However, closed expressions of the probability density, cumulative distribution function, reliability function, hazard function, moment generating function and the rth moment are found for this ratio distribution and proved to be a linear combination of the Generalized-F distribution. Moreover, the particular case, the ratio of two independent Hyper-Exponential distribution is examined.

Global Stability Of A Delayed Hiv-1 Model With Saturations Response, Nigar Ali, Gul Zaman, M. Ikhlaq Chohan

Applied Mathematics & Information Sciences

In this article, an HIV-1 infection dynamical model with saturation response including two continuous delays is presented. One delay represents the latent period between the time of contact of virus particles with targeted cells and the time of entering into the cells. While the other delay is used for the period of production of new virions that release from the infected cells. The basic reproduction number R0 is investigated and proved that if R0 ≤ 1, the infection-free equilibrium is globally asymptotically stable. However, if R0 > 1, then an infected equilibrium occurs which is globally asymptotically stable. The analytical and …

Sumudu Computation Of The Transient Magnetic Field In A Lossy Medium, Fethi Bin Muhammad Belgacem, Eman H. Al-Shemas, Rathinavel Silambarasan

Applied Mathematics & Information Sciences

This research article aims at treating the transverse electromagnetic wave propagation in lossy media, labeled TEMP. Following the trail of works by Hussain and Belgacem, and Belgacem et al. towards getting the transient electric field solution of Maxwell’s equations, here we seek Sumudu transform based solution for transient magnetic field. Moreover, we feature connected interesting shifting properties of the Sumudu transform, some found useful in solving this very particular problem. Furthermore, we establish new analytico-numerical results, and exhibit graphical profiles of Sumudued ramp, gaussian pulse, and finite sinusoidal functions.

Non-Linear Heat And Mass Transfer Of Second Grade Fluid Flow With Hall Currents And Thermophoresis Effects, Nabil T. M. El-Dabe, A. Refaie Ali, A. A. El-Shekhipy, G. A. Shalaby

Applied Mathematics & Information Sciences

A mathematical model analysis has been developed to investigate the effect of thermophoresis on unsteady flow of non- Newtonian fluid with heat and mass transfer through a porous medium over a permeable infinite vertical plate. The considered non- Newtonian fluid follows a second grade model and is stressed by a uniform strong magnetic field; so the Hall currents are taken into consideration. The problem is modulated mathematically by a system of coupled non-linear partial differential equations which pertaining to describe the continuity, momentum, energy and concentration. These equations involve the effects of thermal radiation, heat generation, thermal diffusion(Soret), viscous dissipation …

Note On A Picard-Like Method For Caputo Fuzzy Fractional Differential Equations, Stefania Tomasiello, Jorge E. Macıas-Dıaz

Applied Mathematics & Information Sciences

A Picard-like approach which has been used to solve a class of Volterra integro-differential equations, is extended in this manuscript to solve fuzzy fractional differential equations. Such technique uses quadrature rules and Picard’s iterations in the fuzzy context. In spite of this, it is conceived to become a non-recursive scheme, in terms of operational matrices, in the linear regime. Some properties of the method are thoroughly discussed, and some numerical examples are provided in order to illustrate the effectiveness of the approach.

Implementation Of Fuzzy And Adaptive Neuro-Fuzzy Inference Systems In Optimization Of Production Inventory Problem, Ahmed Abdel-Aleem, Mahmoud A. El-Sharief, Mohsen A. Hassan, Mohamed G. El-Sebaie

Applied Mathematics & Information Sciences

Most of the earlier studies in the inventory control and management make assumption that the manufacturing system is reliable and does not fail. However, in the real industrial applications, there is no completely reliable manufacturing system; Machine failure occur and the production does not resume before repair. In this paper we will study and analyze the optimal lot size in a real production system which is not completely reliable. To obtain the optimal production quantity. Fuzzy Inference System (FIS) and Adaptive Neuro-Fuzzy Inference System (ANFIS) have been used for modeling and simulation. This approach combines the advantages of rule-base fuzzy …

2017-2018 Operating Budget, Morehead State University. Budget & Financial Planning Office.

Morehead State University Operating Budgets Archive

2017-2018 Operating Budget of Morehead State University.

Does A Grill Menu Redesign Influence Sales, Nutrients Purchased, And Consumer Acceptance In A Worksite Cafeteria?, Maya Vadiveloo, Vasanti S. Malik, Donna Spiegelman, Walter C. Willett, Josiemer Mattei

Nutrition Faculty Publications

Worksite cafeterias are compelling venues to improve diet quality through environmental changes.

We conducted a pre-post study to evaluate how a cafeteria-initiated grill menu redesign influenced sales, revenue, and nutrient content of foods purchased. Secondly, we evaluated consumer opinions about menu changes to inform practices for worksite environment interventions. Monthly sales data (2012-2015) were used to compute gross sales and revenue of entrées and side dishes pre-post menu changes. Alternative protein sources replaced red meat; nutrient composition and nutrients purchased were compared using Food Pro software. Consumer responses were queried using online surveys; open-ended responses were analyzed using NVivo. Differences …

Physical Therapy 2017, Nova Southeastern University

Health Professions Divisions Course Catalogs and Course Descriptions

No abstract provided.

Strategic Person And Organization Development: Implications Of Imago Dei For Contemporary Human Resource Management, Richard H. Jonsen

Rohrer College of Business Departmental Research

This paper examines and compares the foundational assumptions of contemporary scholarship and practice on strategic human resource management to those embedded in emerging Christian faith-based approaches to business. An alternative ecumenical, biblically based set of assumptions for a Christian approach to strategic human resource management — or strategic person and organization development — is developed, along with corresponding set principles for future scholarship and practice.

Global Asymptotic Stability For Discrete Single Species Population Models, A. Bilgin, Mustafa Kulenovic

Mathematics Faculty Publications

We present some basic discrete models in populations dynamics of single species with several age classes. Starting with the basic Beverton-Holt model that describes the change of single species we discuss its basic properties such as a convergence of all solutions to the equilibrium, oscillation of solutions about the equilibrium solutions, Allee’s effect, and Jillson’s effect. We consider the effect of the constant and periodic immigration and emigration on the global properties of Beverton-Holt model. We also consider the effect of the periodic environment on the global properties of Beverton-Holt model.

Assessment Of Disease Lesion Removal As A Method To Control Chronic Montipora White Syndrome, Silvia Beurmann, Christina M. Runyon, Patrick Videau, Sean M. Callahan, Greta S. Aeby

Research & Publications

Coral colonies in Ka–ne‘ohe Bay, Hawai‘i (USA), are afflicted with the tissue loss disease chronic Montipora white syndrome (cMWS). Here we show that removal of chronic disease lesions is a potential method to slow the progression of cMWS in M. capitata. Over the 24 wk observation period, treatment colonies lost almost half the amount of tissue that was lost by control colonies. The percentage of tissue loss at each sampling interval (mean ± SEM; treatment: 1.17 ± 0.47%, control: 2.25 ± 0.63%) and the rate of tissue loss per day (treatment: 0.13 ± 0.04%, control: 0.27 ± 0.08%) were both …

Identification And Characterization Of Fungal Isolates From Land-Applied Sewage Sludge, Vaille Swenson, Hope L. Juntunen, R Honour, R C. Hale, Michael Gaylor, Patrick Videau

Research & Publications

Approximately eight million dry tons of sewage sludge is generated in the U.S. each year, with more than half of that now land-applied as the primary method of disposal. Despite the proliferation of this practice, little is known about the microbial constituents of these noxious materials. To address this knowledge gap, we isolated and characterized fungi present in archived samples of land-disposed sewage sludge collected from the Snoqualmie National Forest (Washington State). Sludge samples were resuspended in sterile water and 15 fungal isolates were selected and purified on sabouraud dextrose agar plates supplemented with 50 mg/L of chloramphenicol. Fungal morphology …

Casco Bay Climate Change Vulnerability Summary Report, Casco Bay Estuary Partnership, Natural Choices, Waterview Consulting

Publications

The Casco Bay region is vulnerable to seven important climate stressors highlighted by the US Environmental Protection Agency: warmer summers; warmer winters; warmer waters; increased drought; increased storminess (evident in higher total precipitation, frequency and intensity); sea level rise; and ocean acidification (US EPA 2014). These climate stressors do not operate in isolation. Compounding their impacts are factors such as population growth, habitat fragmentation and destruction, and resource depletion that can further tax ecosystems and species.

The Hetz Gene Regulates Heterocyst Formation In Anabaena Sp. Strain Pcc 7120, Patrick Videau, Vaille Swenson, Michael Gaylor, S M. O'Hanlon, L M. Cozy

Research & Publications

To form a complex multicellular organism, stem cells must differentiate into each cell/tissue type along proper spatiotemporal scales. The study of differentiation and organismal development has historically been conducted in prokaryotes due to their genetic and morphological simplicity. Anabaena sp. strain PCC 7120 is a multicellular filamentous cyanobacterium that differentiates a morphologically distinct secondary cell type, the heterocyst, in response to a lack of combined environmental nitrogen. Heterocysts are regularly spaced along filaments and fix atmospheric dinitrogen to maintain organismal viability in its absence. Previous work suggested that the hetZ gene is involved in heterocyst differentiation, but the insertional mutants …

Pacs Viewbook 2017-2018, Program In Audiology And Communication Sciences

PACS News

No abstract provided.

Scaling Up The Self, Scaling Down The World: Self-Objectification And The Politics Of Carbon Offsets And Personalised Genomics, Joshua Reno

Anthropology Faculty Scholarship

Two global initiatives, the Genographic Project and the Carbon Lottery, share an ambition to make abstract, global processes—human evolution and climate change—comprehensible and engaging to non-specialists. Despite their differences, they both do so by means of self-objectifications that scale up the selves of participants and scale down complex, spatio-temporal models of human-world relations. Based on the author’s auto-ethnographic experience as a participant in both initiatives, it is argued that carbon calculators and personalised genomics involves a pragmatics of scale that evaluates and compares users on the basis of their relative expression of, or deviation from, a standard. Furthermore, this is …

The Anti-Sepsis Activity Of The Components Of Huanglian Jiedu Decoction With High Lipid A-Binding Affinity, Guirong Chen, Yubin Xu, Jing Jing, Brianna Mackie, Xinchuan Zheng, Xu Zhang, Jing Wang, Xuetao Li

Medicinal Chemistry Publications

Huanglian Jiedu Decoction (HJD), one of the classic recipes for relieving toxicity and fever, is a common method for treating sepsis in China. However, the effective components of HJD have not yet been identified. This experiment was carried out to elucidate the effective components of HJD against sepsis. Thus, seven fractions from HJD were tested using a biosensor to test their affinity for lipid A. The components obtained that had high lipid A-binding fractions were further separated, and their affinities to lipid A were assessed with the aid of a biosensor. The levels of LPS in the blood were measured, …

Detection Of Trends In The 7-Day Sustained Low-Flow Time Series Of Irish Rivers, Ahmed Nasr, Michael Bruen

Articles

A combination of statistical hypothesis testing methods (Mann-Whitney, Mann-Kendall and Spearman’s rho) and visual exploratory analysis were used to investigate trends in Irish 7-day sustained low-flow (7SLF) series possibly driven by changes in summer rainfall patterns. River flow data from 33 gauging stations covering most major Irish rivers were analysed, after excluding catchments where low flows are influenced by significant human interventions. A statistically significant increasing trend in the 7SLF series was identified by all three tests at eight gauging stations; in contrast, a statistically significant decreasing trend was identified by all three tests at four stations. The stations with …

Momentum: Research & Innovation For Fall 2017, University Of Rhode Island

Publications (Research and Economic Development)

The Fall 2017 issue of Momentum: Research & Innovation, a periodical focused on research at the University of Rhode Island.

Can Neuroscientific Studies Be Of Personal Value?, Andrew Mullins

Philosophy Papers and Journal Articles

This essay reflects on the ability of neuroscientific data to be of personal value and to enrich our lives by offering insight into our capacities for self management and choice. The theory of cognitive dualism proposed by Roger Scruton seeks to preserve rationality and allow for freedom of will, but he appears reluctant to engage with the data accruing in neural studies. I contrast this approach with a Thomistic hylomorphic approach to the philosophy of mind that is founded on participation in being. It offers the potential to draw on neurobiological knowledge for insights into rationality, motivation, and eudaimonia. …

A Gratitude Intervention In A Christian Church Community, Jens Uhder, Mark R. Mcminn, Rodger K. Bufford, Kathleen Gathercoal

Faculty Publications - Doctor of Psychology (PsyD) Program

This field experiment examined the effects of a gratefulness intervention in the context of a Christian church congregation. Two Christian congregations with comparable demographic and socio-economic characteristics were enrolled and assigned to the experimental and comparison conditions. The gratitude intervention was developed collaboratively with church leaders. Though within-subject effects were found for psychological well-being, spiritual well-being, life satisfaction, positive and negative affect, daily spiritual experiences, and favorable views of psychology and interdisciplinary collaboration, the comparison group showed similar increases to the intervention group. Thus, the effects of the gratitude intervention were supported within but not across groups. No significant changes …

Silver Nanoparticles And Drug Resistant Bacteria, Aliza Eisig

The Science Journal of the Lander College of Arts and Sciences

The scientist who discovered penicillin and its use as an antibiotic, Alexander Fleming, also raised concerns about bacterial resistance. As he predicted, in the twenty first century, the overwhelming use of antibiotics has led to both drug- and multi-drug resistant bacteria. This paper attempts to investigate the antibacterial potential of silver nanoparticles against drug resistant bacteria. By using Touro's online library database, the efficacy of silver nanoparticles as a potential antibacterial agent was comprehensively researched. Using transmission electron microscopy and the disk diffusion method, silver nanoparticles have been found to exert bactericidal effects by adsorbing to the cell surface and …

Research And Creative Activity, July 1, 2016-June 30, 2017: Major Sponsored Programs And Faculty Awards For Research And Creative Activity, University Of Nebraska-Lincoln, Office Of Research And Economic Development, University Of Nebraska-Lincoln

Office of Research and Economic Development: Publications

Introduction by Steve Goddard, Interim Vice Chancellor for Research and Economic Development, University of Nebraska-Lincoln:

This booklet highlights successes in research, scholarship and creative activity of the University of Nebraska–Lincoln faculty during the fiscal year July 1, 2016-June 30, 2017.

It lists investigators, project titles and funding sources on major grants and sponsored program awards received during the year; fellowships and other recognitions and honors bestowed on our faculty; books published by faculty; performances, exhibitions and other creative activity by our faculty; and intellectual property licenses and patents issued for the products of Nebraska research.

This booklet is an impressive …

2017 Nebraska Water Monitoring Programs Report, Marty Link, Ryan Chapman

Nebraska Department of Environmental Quality: Reports

The Nebraska Department of Environmental Quality (NDEQ) is charged with monitoring, assessing, and to the extent possible, managing the state’s water resources. The purpose of this work is to protect and maintain high quality water and encourage or execute activities to improve poor water quality. Monitoring is done on nearly 17,000 miles of flowing rivers and streams, more than 134,000 acres of surface water in lakes and reservoirs, as well as the vast storage of groundwater in Nebraska’s aquifers.

Lifelines Winter 2017, Southern Adventist University

Lifelines - Biology Department Newsletter

The Winter 2017 issue of Lifelines contains articles on life-long learning, taskforce work at Shenandoah Valley Academy, an alumni spotlight, and a pictorial directory of the 2017 biology and allied health graduates.

Developing Student Leaders In Campus Outdoor Recreation Programs: An Appreciative Inquiry, Dan Sandberg, Bruce Martin, Andrew Szolosi, Sherry Early Phd

Leadership Studies Faculty Research

Campus outdoor recreation programs can play an integral role in developing student leaders. In this study, we sought a better understanding of the shared positive elements exemplary outdoor programs are using to develop their student leaders. The study was designed using a collec­tive case study methodology and the theoretical lens of the Leadership Identity Development (LID) model. Representatives from five exemplary outdoor programs were interviewed with an appreciative inquiry approach. Five common themes emerged from the data: (a) Institutional Support, (b) Transformative Experiences, (c) Meaningful Culture, (d) Facilitative Structures, and (e) the Keys to the Castle: Authentic Leadership Opportunities. Themes …