Digital Commons Network^™

Potential Of Sequential Cropping In The Management Of Root-Knot Nematodes In Okra, A. N. Mweke, J. W. Kimenju, A. A. Seif, E. W. Mutitu, G. K. Mutua

All Peer-Reviewed Publications

The response of different crops to a mixed population of root-knot nematodes, Meloidogyne javanica and M. incognita and their potential as suppressants in sequential cropping systems was evaluated in greenhouse and field experiments. Crops rated as resistant were five maize cultivars, four sorghum cultivars, two millet varieties, guwar and two pigeonpea cultivars which had galling indices ranging between 1.4-3.6. cowpea cv. K80 was rated as moderately resistant with a galling index of 4 while greengram and cowpea cv. KKI were rated as susceptible with galling indices ranging from 5.6 to 7.4. Four crops namely sweetcorn, babycorn, maize cv. Pioneer (Ph3253) …

On The Impact Of Winter Conditions On The Dynamics Of An Isolated Population, Lev V. Nedorezov, E. V. Volkova, Alexandr M. Sadykov

All Peer-Reviewed Publications

This chapter is devoted to the analysis of single-species population dynamics models with overlapping and non-overlapping generations. Within the framework of all models it is assumed that there are no activities of individuals during the wintertime (as, for example, is the case for forest insect populations in the boreal zone), and changes in population size at these moments are described with a broken trajectory (“jump down”). Also, it is assumed that the fecundity of individuals is constant and that the quota of individuals surviving winter depends on the within-year population dynamics. The dynamics of the models, which are determined by …

Life History Of The Predatory Mite Phytoseiulus Fragariae On Tetranychus Evansi And Tetranychus Urticae (Acari: Phytoseiidae, Tetranychidae) At Five Temperatures, Geraldo José Nascimento De Vasconcelos, Gilberto José De Moraes, Ítalo Delalibera Júnior, Markus Knapp

All Peer-Reviewed Publications

Tetranychus evansi Baker and Pritchard and Tetranychus urticae Koch (Acari: Tetranychidae) are important pests of Solanaceae in many countries. Several studies have demonstrated that T. urticae is an acceptable prey to many predatory mites, although the suitability of this prey depends on the host plant. T. evansi, has been shown to be an unfavorable prey to most predatory mites that have been tested against it. The predator Phytoseiulus fragariae Denmark and Schicha (Acari: Phytoseiidae) has been found in association with the two species in Brazil. The objective of this work was to compare biological parameters of P. fragariae on T. …

Seasonal Variation In The Physical Characteristics Of The Copepod Calanus Finmarchicus (Gunnerus) Along The North Atlantic, A. A. Yusuf, L. Webster

All Peer-Reviewed Publications

Physical oceanographic changes such as the North Atlantic Oscillation, which manifested in the 1990s, are said to affect the seasonal/stage dependent, vertical migrations and life cycle of Calanus finmarchicus. C4-C6 stages of C. finmarchicus collected during spring and summer in 2002 from the Irminger Sea, Greenland Sea, Iceland shelf and the Raykjanes Ridge were analysed microscopically for their prosome and total body lengths and gravimetrically for dry weights. Dry weight ranged from 60 μg individual-1 in C4 to 326.6 μg individual-1 in C6 stages. Total body lengths showed an increase with sample stage and season (2.10 mm in spring C4 …

Concentration-Dependent Parsimonious Releaser Roles Of Gregarious Male Pheromone Of The Desert Locust, Schistocerca Gregaria, Edwin Rono, Peter G.N. Njagi, Magzoub O. Bashir, Ahmed Hassanali

All Peer-Reviewed Publications

The responses of (i) groups of crowd-reared mature males of desert locust, Schistocerca gregaria to a choice of two columns of air, one permeated with different concentrations of phenylacetonitrile (PAN), the major component of gregarious-phase male-produced pheromone, and the other untreated, and (ii) individual crowd-reared mature males of the insect to varying concentration gradients of PAN, were studied in two different types of arena. In the choice assay, locusts preferred to be within PAN-permeated air column at low relative doses of the pheromone, but away from PAN at high relative doses. In the second assay, individual locusts were arrested close …

Race-Specific Drugs: Regulatory Trends And Public Policy, Osagie K. Obasogie, David E. Winikoff

Faculty Scholarship

No abstract provided.

Chapel Service (April 29, 2008), Daniel Baer

ATS Chapel Services

No abstract provided.

Ua35/11 Arête December 2007, Honors College

Arête: Honors College at WKU Newsletter

No abstract provided.

God's Design And Phonemic Awareness, Jill A. Jones, Connie Mcdonald

Faculty Publications and Presentations

Phonemic awareness is the foundation for a child's literacy development. God's initial interation with man after creation, through the spoken word, bestows authority on oral language. Manipulation of language begins in infancy and continues throughout one's life. Teachers need to understand what phonemic awareness entails in order to develop and assess a child's development in this area.

Chapman Economic Forecast Sees Recession In 2008, Chapman University Media Relations

Chapman Press Releases 2003-2011

No abstract provided.

Capacitance-Voltage Studies Of Atomic-Layer-Deposited Mos Structrures On Gallium Arsenide And Other Iii-V Compound Semiconductors, Tian Yang

Department of Electrical and Computer Engineering Masters Theses

Si-based CMOS devices with traditional structure are approaching the fundamental physical limits. New device structures and materials must be explored to continue the trend of increasing electronic device speed and decreasing size at the same time. Recently, III-V compound semiconductors are considered as novel channel materials to replace Si due to their high electron mobilities. However, the main obstacle to implement III-V as novel channel materials for CMOS application is the lack of high-quality, thermodynamically stable insulators. Thus, systematic studies were carried out on atomic-layer-deposited (ALD) high-k dielectrics on GaAs and other III-V semiconductors. The experiment results show that interface …

Impeding And Facilitating Factors In The Implementation Of Lean Enterprise Methodology, Brian S. Leonard

Purdue Polytechnic Masters Theses

The field of lean enterprise has continued to grow since being introduced by the Toyota Corporation after World War II. In academia lean strategies are being introduced in order to prepare students for this new era in operating procedures. Currently, the majority of research in business and academia is focused on processes and methodology, but leadership strategies are yet to be fully examined.

According to Hamilton (2006) there are insufficient resources and research that contribute to understanding successful implementation strategies. Hamilton (2006) expresses concern of the lack of focus on leadership strategies and employee development in lean enterprise.

This qualitative …

Negotiating Matriarchy: The Discourse Of Single Mothers Taking Care Of Their Families On Small Incomes, Tonya Janiece Redman

Communication Theses - Archive

This study used ten in-depth interviews with single mothers on small incomes to analyze for discursive themes. Three theoretical frameworks of Symbolic Interactionism, Presentation of Self and Cognitive Dissonance were used to guide this analysis. The discourse of these mothers found a matriarchal framework with four discursive themes of centrality, solidarity, moral economy, and support. Centrality refers to the way these single mothers position themselves as provider, protector and nurturer. The theme of Solidarity refers to how mothers viewed their relationships with their children. Discursive matriarchy is characterized by a moral economy that emphasizes spending time and paying attention. Support …

Synthesis, Structure And Characterization Of Silver Doped Diamond Like Carbon Thin Films, Pankaj Jyoti Hazarika

Material Science and Engineering Theses - Archive

Diamond like carbon (DLC) films have gained grounds in the biomedical field as an inert, biocompatible, low friction and wear resistant coating and are widely used in heart valves, coronary artery stents, dental implants, knee prosthesis and other vascular devices. In addition, Ag nanoparticles/films can prevent the formation of biofilm on biomedical implants by degrading the metabolic activities like permeability and respiration and also impair DNA replicability. Thus, Ag-doped DLC (Ag-DLC) can serve as a multifunctional bio coating combining desirable antibacterial and physical/ mechanical characteristics. In the present study, Ag-DLC films were synthesized utilizing a hybrid Plasma CVD and Magnetron …

Synthesis And Characterization Of Ferromagnetic Nanoparticles, Kazuaki Yano

Material Science and Engineering Theses - Archive

Ferromagnetic nanoparticles and their bimagnetic nanoparticles with uniform size distribution have drawn great attention in the past decades because of their unique magnetic properties and potential applications in high density recording media, exchange-spring permanent magnets and biotechnology. In this thesis, synthesis and characterization of ferromagnetic nanoparticles (FePt, Sm-Co system) and bimagnetic nanoparticles (FePt/Fe3O4, FePt/Au) are reported. FePt nanoparticles with different sizes and compositions were successfully synthesized via chemical synthesis. FePt particle size was tuned to a range of from 3 nm to 8 nm with 1 nm accuracy by changing the surfactant to Pt precursor ratio. By optimizing the amount …

On The Near Field Mean Flow Structure Of Transverse Jets Issuing Into A Supersonic Freestream, Dean Anthony Dickmann

Mechanical and Aerospace Engineering Dissertations - Archive

The near field mean flow structure of transverse jets issuing from a surface into supersonic crossflow is examined using numerical methods and separation topology. The Navier-Stokes solver Falcon, developed at Lockheed Martin, was used to simulate the interaction between the jet and freestream over a flat plate and a generic missile body. The near field flow structure included a l bow shock upstream of the jet interacting with the approaching boundary layer that forms a pair of horseshoe vortices while another l- structure closer to the jet formed a second pair of horseshoe vortices. As the jet was turned downstream …

Methodologies For Automated Microassembly, Mohammad A. Mayyas

Mechanical and Aerospace Engineering Dissertations - Archive

The development of micromachining technologies has provided wide applications in micro sensing and actuation. However, most of the demonstrated devices are selectively constructed by fabrication processes that are limited to complexity, configuration, dimension, and material variation. The monolithic fabrication has limitations and does not allow the inclusion of multiple components of incompatible processes. Therefore, the construction of 3D microstructures by heterogeneous microassembly is an alternate manufacturing route. In deterministic, monitored or controlled microassembly there has been considerable research in developing, analyzing and applying distributed algorithms for sensor and sensorless based assembly processes. Meso-scale teleoperated work-cells supported by Nano manipulators have …

Thermal Enhancement Of Stacked Dice Replacing Wire Bonds With Through Silicon Vias At Location Of Die Pads, Venkata Chepuri Krishna Teja

Mechanical and Aerospace Engineering Theses - Archive

Through Silicon vias can offer quick time to market of circuits designed in a modular manner and can also be used to customize the product according to the needs of the customers. This gives a way to avoid both excess inventory risks and larger footprints. A through silicon via could be described as, a vertical component through which a backside interconnect for a pair of bonded wafers forming a wafer stack is ultimately cut into a number of stacked dice. Various embodiments have been patented [1, 2] but implementation of these architectures can be inhibited based on thermal, mechanical and …

Numerical Simulation Of Magnetohydrodynamics, Takahiro Sonoda

Mechanical and Aerospace Engineering Theses - Archive

Use of electromagnetic fields has been shown to be an effective way to control the behavior of electrically conducting fluids. Specifically, the modification of the boundary layer profile with electromagnetic fields can yield performance improvements such as reduced drag and improved heat transfer. Though this approach has been demonstrated computationally and experimentally with conducting liquids (i.e. seawater), application to aerodynamic devices operating in air has not seen the same success. Through the use of numerical simulation and eventually optimization, we hope to develop efficient designs that are effective for boundary layer control for low temperature conducting gases (non-thermal plasmas). The …

An Experimental Study On Thermal Bonding Effects Of Pmma Based Micro-Devices Using Hot Embossing, Varun Sood

Mechanical and Aerospace Engineering Theses - Archive

Basic configuration and functioning of various subsystems of a developed HEMM system for thermal bonding are discussed. The bond strength and micro channel geometry degradations dependence on controlled process parameters in thermal bonding using hot embossing has been investigated. The process parameters examined were bonding temperature, bonding or applied load and holding time. Polymeric substrates with different feature dimensions and thickness were embossed and bonded using hot embossing technology. The feature dimensions before and after bonding were examined to assess the geometry changes as functions of the bonding process. This assessment could provide guidance during the design phase of micro-fluidic …

Derivation Of The Dynamics Equations For Receiver Aircraft In Aerial Refueling, Jayme Lynn Waishek

Mechanical and Aerospace Engineering Theses - Archive

This thesis describes the derivation of a new set of nonlinear, 6--DOF equations of motion of a receiver aircraft undergoing an aerial refueling, including the effect of time-varying mass and inertia properties associated with the fuel transfer and the tanker's vortex induced wind effect. Since the center of mass of the receiver is time--varying during the fuel transfer, the equations are written in a reference frame that is geometrically fixed in the aircraft. Due to the fact that aerial refueling simulation and control deal with the position and orientation of the receiver relative to the tanker, the equations of motion …

Growth/Decline Of Employment Subcenter In Polycentric Regions: The Case Of The Dallas-Fort Worth Metropolitan Area, Maher Sayel Al-Shammari

Public Affairs Dissertations - Archive

This research is concerned with explaining the variation in growth rates among employment subcenters. The purpose of the study is to find answers to the question: What factors/variables contribute to the growth or decline of employment subcenters? More specifically, the study aims to 1) identify and describe employment subcenters in the Dallas-Fort Worth metropolitan area, and 2) explain the variation in their growth rate over a specified period of time through testing a set of variables extracted from related literature. A multiple regression analysis technique is employed to complete the empirical analysis. The DFW metropolitan area was chosen as a …

Factors Influencing The Relationship Between Nonprofit Child Care Providers And The Texas Department Of Family And Protective Services As A Predictor Of Policy Outcomes, Larry Watson

Public Affairs Dissertations - Archive

Over the past 30 plus years, there has been a shift in public administration responsibilities from providing direct services to the complex functions of contract management. Public administrators must now perform functions across jurisdictional lines to accomplish the purposes of the state (Frederickson & Smith, 2003). Public administrators can no longer be concerned only with the functions of government but must accomplish their work through the private and nonprofit sectors as well. The movement from the provision of direct services to the management of contracts is evident in Texas, where state legislators are working to privatize the state's child welfare …

Do Green Buildings Influence People's Lifestyle Decisions And Support For Environmental Policy?, Amanda L. Popken

Planning Theses - Archive

This thesis explores the possibility that experience with green buildings influences peoples' behavior in ways that help bridge the gap between, on one hand, public concern for the natural environment and on the other hand, willingness to adopt sustainable lifestyles and support pro-environmental policies. The study utilizes research on factors that influence behavior to construct a theoretical model in which these factors might be influenced by a person's experience in a green building. The study explores two specific possibilities of behavioral change: people may change their consumption habits to reflect a more sustainable lifestyle; people may change their political behavior …

Factors Influencing The Relationship Between Nonprofit Child Care Providers And The Texas Department Of Family And Protective Services As A Predictor Of Policy Outcomes, Larry Dan Watson

Public Affairs Dissertations - Archive

Over the past 30 plus years, there has been a shift in public administration responsibilities from providing direct services to the complex functions of contract management. Public administrators must now perform functions across jurisdictional lines to accomplish the purposes of the state (Frederickson & Smith, 2003). Public administrators can no longer be concerned only with the functions of government but must accomplish their work through the private and nonprofit sectors as well. The movement from the provision of direct services to the management of contracts is evident in Texas, where state legislators are working to privatize the state's child welfare …

Planning For Growth In Cities And Metropolitan Regions: An Empirical Study Of Impact Fees And Choice, Chi-Hyoung Park

Public Affairs Dissertations - Archive

This research examines what city factors relate to the likelihood of adopting impact fees by local governments within metropolitan regions using data from the U.S. Census Bureau. More and more cities are adopting different types of impact fees for financing public facilities and infrastructure to accommodate their cities' growth without full understanding of issues, public and private criticisms of impact fees, and the empirical information needed. This dissertation investigates a random sample of 278 cities out of 827 cities populations over 25,000 located within 97 MSAs to understand what variables within their settings relate to impact fee adoptions using five …

A Comparative Study Of Performance Measurement In Korean Local Governments Using Data Envelopment Analysis And Stochastic Frontier Analysis, Dong Jin Lim

Public Affairs Dissertations - Archive

This study examines efficiency as a key component of performance, applies new performance measurement techniques to the measurement of local government performance, and verifies theoretical debates on economic, financial, political, and environmental factors related to performance in local government. Improving performance and promoting efficiencies in local government are important issues in both academic and practical public administration. Despite the remarkable development of performance measurement in local government since the 1990s, empirical evidence is still limited on the extent of the utility and practicability of performance measurement in local government.

Results of this research are developed from a study of Korean …

Trends Of Vehicular Emissions For Clean Air Associates Precombustion Retrofit Device, Jaya Vani Nagireddi

Civil Engineering Theses - Archive

The research study objective was to find if there was any reduction in onboard exhaust emissions from a light duty passenger car (2007 Dodge Charger) with a Clean Air Catalytic Converter manufactured by Clean Air Associates, Inc. The research was conducted by the Civil and Environmental Engineering Department, University of Texas at Arlington as part of the North Central Texas Council of Governments Aftermarket Technology and Fuel Additive Research Program. Initially, emissions of pollutants were measured without the Clean Air Associates' retrofit device, called Baseline testing. A Horiba OBS-1300 On-Board System measured concentrations of the pollutants NOx, CO, CO2 and …

Modeling Unsaturated Soil Response Under Suction-Controlled Multi-Axial Stress States, Arthit Laikram

Civil Engineering Dissertations - Archive

In this research work, a novel suction-controlled true triaxial testing apparatus has been developed to test 3-in (7.5-cm) side, cubical specimens of unsaturated soil under controlled-suction states for a wide range of stress paths that are not easily achievable in a conventional cylindrical apparatus. The equipment is a mixed-boundary type of device, with the specimen seated on top of a high-air-entry ceramic disk and between five flexible (latex) membranes on the remaining sides of the cube. The new cell is an upgraded, more elaborate version of the one previously reported by Hoyos (1998), featuring two independent pore-air and pore-water pressure …

Suppressing Delta-I Noise In Mcml Circuits In Mixed Signal Environment, Ritesh Jayant Mehta

Electrical Engineering Theses - Archive

This work addresses the problem of simultaneous switching noise (SSN) in mixed signal environment. It is shown that the Metal Oxide Semiconductor Current Mode Logic (MCML) can be used to minimize the SSN. In short channel devices, Drain Induced Barrier Lowering (DIBL) effect causes the current mismatch problem. It is seen that this current mismatch problem aggravates SSN. Basic logic gates were designed using MCML topology at 5 Gbps. Parasitic model was introduced at power supply lines and substrate to study the behaviour of these logic gates in the presence of parasitics. Interpolation type delay cells were used to suppress …