863 Works

Data from: The tree of life and a new classification of bony fishes

Ricardo Betancur-R., Adela Roa-Varon, Nancy I. Holcroft, W. Calvin Borden, Terry Grande, Kent Carpenter, Millicent Sanciangco, Chenhong Li, Dahiana Arcila, Jesus A Ballesteros, Guillermo Ortí, J. Andrés López, Matthew A. Campbell, Edward O. Wiley, Gloria Arratia, Guoqing Lu, Stuart Willis, Richard E. Broughton, Cureton II, James C, Feifei Zhang & Daniel J. Hough
The tree of life of fishes is in a state of flux because we still lack a comprehensive phylogeny that includes all major groups. The situation is most critical for a large clade of spiny-finned fishes, traditionally referred to as percomorphs, whose uncertain relationships have plagued ichthyologists for over a century. Most of what we know about the higher-level relationships among fish lineages has been based on morphology, but rapid influx of molecular studies is...
This data repository is not currently reporting usage information. For information on how your repository can submit usage information, please see our documentation.

Data from: Evolution of woody life form on tropical mountains in the tribe Spermacoceae (Rubiaceae)

Suman Neupane, Paul O. Lewis, Steven Dessein, Hunter Lee Shanks, Sushil Paudyal, Frederic Lens & Hunter Shanks
Spermacoceae are mainly an herbaceous group in the Rubiaceae. However, a few lineages are woody, and are found in a diverse range of habitat types. Three of the largest woody lineages (Arcytophyllum, Hedyotis, and Kadua) are characterized by their distribution in the moist tropical mountains, and have disjunct distribution patterns with respect to their closest relatives. In this study, we explore the cases of derived woodiness in these three lineages and their diversification dynamics in...
This data repository is not currently reporting usage information. For information on how your repository can submit usage information, please see our documentation.

Data from: Synthesis and characterization of azo-guanidine based alcoholic media naked eye DNA sensor

Ataf Ali Altaf, Uzma Hashmat, Muhammad Yousaf, Bhajan Lal, Shafiq Ullah, Alvin A. Holder & Amin Badshah
DNA sensing always has an open meadow of curiosity for biotechnologists and other researchers. Recently, in this field, we have introduced an emerging class of molecules containing azo and guanidine functionalities. In this study, we have synthesized three new compounds (UA1, UA6 and UA7) for potential application in DNA sensing in alcoholic medium. The synthesized materials were characterized by elemental analysis, FTIR, UV-visible, 1H NMR and 13C NMR spectroscopies. Their DNA sensing potential were investigated...
This data repository is not currently reporting usage information. For information on how your repository can submit usage information, please see our documentation.

Data from: Supplementing small farms with native mason bees increases strawberry size and growth rate

Lisa Horth & Laura A. Campbell
Pollination services, especially those of bees, play a vital role in agriculture. Declining honeybee populations require us to find alternative solutions for sustainable agriculture. Native bees are proving to be efficient pollinators. Mason bees (Osmia lignaria) provide valuable pollinator services for some woody orchard species, but their value as pollinators for herbaceous crops is largely untested. We assessed the effectiveness of O. lignaria supplementation on nine strawberry farms over two growing seasons. We specifically selected...
This data repository is not currently reporting usage information. For information on how your repository can submit usage information, please see our documentation.

Data from: Experimental demonstration of an Allee effect in microbial populations

RajReni B. Kaul, Andrew M. Kramer, Fred C. Dobbs & John M. Drake
Microbial populations can be dispersal limited. However, microorganisms that successfully disperse into physiologically ideal environments are not guaranteed to establish. This observation contradicts the Baas-Becking tenet: ‘Everything is everywhere, but the environment selects’. Allee effects, which manifest in the relationship between initial population density and probability of establishment, could explain this observation. Here, we experimentally demonstrate that small populations of Vibrio fischeri are subject to an intrinsic demographic Allee effect. Populations subjected to predation by...
This data repository is not currently reporting usage information. For information on how your repository can submit usage information, please see our documentation.

Data from: Wild acorn woodpeckers recognize associations between individuals in other groups

Michael A. Pardo, Emilee A. Sparks, Tejal S. Kuray, Natasha D. Hagemeyer, Eric L. Walters & Walter D. Koenig
According to the social intelligence hypothesis, understanding the cognitive demands of the social environment is key to understanding the evolution of intelligence. Many important socio-cognitive abilities, however, have primarily been studied in a narrow subset of the social environment—within-group social interactions—despite the fact that between-group social interactions often have a substantial effect on fitness. In particular, triadic awareness (knowledge about the relationships and associations between others) is critical for navigating many types of complex social...
This data repository is not currently reporting usage information. For information on how your repository can submit usage information, please see our documentation.

Data from: Causes of seasonal decline in reproduction of the cooperatively-breeding acorn woodpecker

Walter D. Koenig & Eric L. Walters
Clutch size and reproductive success decline seasonally in a wide range of temperate avian taxa. Two competing hypotheses have been proposed to explain such declines: the “timing” hypothesis, which states that conditions affecting reproduction decline intrinsically with date, and the “quality” hypothesis, which proposes that high-quality individuals or individuals in high-quality situations breed earlier. We contrasted the relative importance of these two hypotheses using a long-term dataset of the cooperatively-breeding acorn woodpecker (Melanerpes formicivorus) in...
This data repository is not currently reporting usage information. For information on how your repository can submit usage information, please see our documentation.

Data from: Artificial light at night confounds broad-scale habitat use by migrating birds

James D. McLaren, Jeffrey J. Buler, Tim Schreckengost, Jaclyn A. Smolinsky, Matthew Boone, E. Emiel Van Loon, Deanna K. Dawson, Eric L. Walters & E. Emiel Van Loon
With many of the world's migratory bird populations in alarming decline, broad-scale assessments of responses to migratory hazards may prove crucial to successful conservation efforts. Most birds migrate at night through increasingly light-polluted skies. Bright light sources can attract airborne migrants and lead to collisions with structures, but might also influence selection of migratory stopover habitat and thereby acquisition of food resources. We demonstrate, using multi-year weather radar measurements of nocturnal migrants across the northeastern...
This data repository is not currently reporting usage information. For information on how your repository can submit usage information, please see our documentation.

Data from: The contribution of marine aggregate-associated bacteria to the accumulation of pathogenic bacteria in oysters: an agent-based model

Andrew M. Kramer, J. Evan Ward, Fred C. Dobbs, Melissa L. Pierce & John M. Drake
Bivalves process large volumes of water, leading to their accumulation of bacteria, including potential human pathogens (e.g., vibrios). These bacteria are captured at low efficiencies when freely suspended in the water column, but they also attach to marine aggregates, which are captured with near 100% efficiency. For this reason, and because they are often enriched with heterotrophic bacteria, marine aggregates have been hypothesized to function as important transporters of bacteria into bivalves. The relative contribution...
This data repository is not currently reporting usage information. For information on how your repository can submit usage information, please see our documentation.

Data from: Gain-of-function experiments in bacteriophage lambda uncover residues under diversifying selection in nature

Rohan Maddamsetti, Daniel T. Johnson, Stephanie J. Spielman, Katherine L. Petrie, Debora S. Marks & Justin R. Meyer
Viral gain-of-function mutations frequently evolve during laboratory experiments. Whether the specific mutations that evolve in the lab also evolve in nature and whether they have the same impact on evolution in the real world is unknown. We studied a model virus, bacteriophage λ, that repeatedly evolves to exploit a new host receptor under typical laboratory conditions. Here we demonstrate that two residues of λ’s J protein are required for the new function. In natural λ...
This data repository is not currently reporting usage information. For information on how your repository can submit usage information, please see our documentation.

Parallel Process: An Empirical Investigation

Thomas E. Pollack
The purpose of the present study was to conduct an empirical investigation of parallel process. The study used a cross-sectional design in which 30 therapy relationships and the corresponding supervision relationships were studied. The therapist assessed the behavior manifested by the patient during a targeted therapy session. Following the subsequent supervision session, the supervisor assessed the behavior manifested by the supervisee during the supervision session. In addition, each of the triad participants (patient, therapist, supervisor)...
This data repository is not currently reporting usage information. For information on how your repository can submit usage information, please see our documentation.

The Effects of Nonlinear Damping on the Large Deflection Response of Structures Subjected to Random Excitation

Chunchu Bhavani Prasad
Effects of both nonlinear damping and large deflection stiffness are included in the theoretical analysis in an attempt to explain the experimental phenomena of aircraft panels excited at high sound pressure levels; that is the broadening of the strain response peak and the increase in modal frequency. Beams and symmetrically laminated plates subjected to acoustic excitation are considered in the analyses. The excitations are ergodic and Gaussian with zero mean. A polynomial containing both linear...
This data repository is not currently reporting usage information. For information on how your repository can submit usage information, please see our documentation.

The Effects of Wellness Activity Choices on Urban Employees' Psychological Mood States and Job Satisfaction

Ruth Porter Holland
This ex-post-facto study was designed to examine the effects of varied levels of physical activity participation choices on employees' mood states and job satisfaction. A six (group) x two (sex) x three (times) ANCOVA method analyzed the relationship of three independent variables (group, sex and repeated exercise sessions) to ten dependent psychological measures (seven mood states and three job satisfaction components). Comparisons by group, sex, and time were made to determine whether four treatment groups...
This data repository is not currently reporting usage information. For information on how your repository can submit usage information, please see our documentation.

The Role of GABA in Reproductive Neuroendocrine Systems

Robert Carter McRee
Local gamma-amino butyric acid (GABA) neurons in the hypothalamus can modulate the luteinizing hormone releasing hormone (LHRH) pulse generating system. Two animal models (intact and ovariectomized rats) were used to determine the nature of modulation of LHRH release by GABA. The experiment determined the release of LHRH, serotonin (5-HT), and 5-hydroxyindole acetic acid (5-HIAA) during two hormonal states with each model. In the intact rat the proestrus and estrus states were examined, and in the...
This data repository is not currently reporting usage information. For information on how your repository can submit usage information, please see our documentation.

Two Essays on IPO Earnings Management

Yong Sun
This dissertation includes two essays that study initial public offerings (IPO) earnings management. The first essay examines the underwriter's certification and monitoring roles in IPO earnings management; the second essay explores the relation between IPO earnings management and post-IPO institutional ownership. In the first essay, we investigate the certification role played by underwriters. We hypothesize that there is a negative relation between IPO earnings management and underwriter reputation and that there is a positive relation...
This data repository is not currently reporting usage information. For information on how your repository can submit usage information, please see our documentation.

Understanding the Digital Divide As It Relates to Electronic Commerce

Franklin D. Gaillard
There exists an electronic digital divide within the United States. This digital divide concerns access to the Internet and its corresponding technologies. The U.S. government is concerned about the digital divide because it appears that certain ethnic groups and income levels are being excluded from computer technologies and the Internet. These groups include African Americans and Hispanics, who are lagging the Caucasians significantly in gaining access to the Internet. For a while the gap between...
This data repository is not currently reporting usage information. For information on how your repository can submit usage information, please see our documentation.

Investigation of Display Issues Relevant to the Presentation of Aircraft Fault Information

Donald Mark Allen
The present study investigated the effects of different display, hypothesis presentation, information presentation, and parameter presentation styles on pilot performance. It was hypothesized that performance would be maximal using picture-based displays, presenting hypothesis information as a composite, showing only out-of-tolerance parameter information, and when parameter information was displayed as a bargraph. The results of the study indicated that pilot performance was best when employing picture- and text-based displays, when fault hypotheses were displayed as composites....
This data repository is not currently reporting usage information. For information on how your repository can submit usage information, please see our documentation.

Periodic Orbit Analytic Construction In The Circular Restricted Three-Body Problem

Jay Shriram Suryawanshi
This thesis investigates an approximate analytic construction of halo-type periodic orbits about the collinear equilibrium points in the circular restricted three-body problem. The research follows a parallel approach to the one used by Ghazy and Newman, but the initial assumptions and utilized functions are unique to this thesis. A suppositional base solution constructed using Jacobi elliptic functions and satisfying Jacobi's integral equation is at the core of the analytic construction framework. The locus of this...
This data repository is not currently reporting usage information. For information on how your repository can submit usage information, please see our documentation.

How do People React to Someone Who Has Recently Tested for HIV? An Experimental Study of the Effects of Sexual Orientation and HIV Status

Stacie A. Wilson
HIV/AIDS-related stigma remains prevalent in our society despite advances in medical treatment, and appears to be based on fear of the illness and negative attitudes toward gay individuals. Previous literature examining the phenomenon, enactment, and consequences of HIV/AIDS-related stigma has primarily been based on self-report measures examining participants' imagined reactions toward a person with HIV/AIDS (PWHA). The present study attempted to expand on the self-report findings and contribute uniquely to the literature by examining participants'...
This data repository is not currently reporting usage information. For information on how your repository can submit usage information, please see our documentation.

Two Essays on the Corporate Payout Behavior of Japanese and European Firms

Rahnuma Binte Ahsan
This dissertation investigates the corporate payout policies in Japanese and European firms in light of substitution and flexibility hypothesis of share repurchase. This study contributes to the literature in four folds-first, provides a comprehensive description of payout behavior in Japan and Europe for the period 1980-2006, second, examines the substitution hypothesis of share repurchase in these regions, third, provides three alternative measures of transitory earnings and fourth, examines the effect of transitory earnings on repurchase...
This data repository is not currently reporting usage information. For information on how your repository can submit usage information, please see our documentation.

Natural Language Human-Computer Dialogue: Menu-Based Natural Language and Visual Performance

Jeffrey John Hendrickson
The present study was conducted to determine design principles for menu-based natural language (MBNL) interfaces and to provide evidence for the nature of visual search processes with menu-based systems. The effects of window size, window activity, and query length were investigated. Window size was manipulated as a between-subjects variable with three levels representing a sixteen-item window size, an eight-item window size, and a four-item window size. Window activity was manipulated as a within-subjects variable with...
This data repository is not currently reporting usage information. For information on how your repository can submit usage information, please see our documentation.

A Comparison of Academic Outcomes in Courses Taught with Open Educational Resources and Publisher Content

Diane N. Ryan
The academic outcomes of retention, completion, persistence and final exam scores between courses taught with open educational resources (OER) and courses taught with publisher content (non-OER) were investigated in this mixed method sequential study. The perceptions and experiences of the instructors who taught the courses were also explored. The participants were 215 community college students enrolled in an online section of Introduction to Communication (CST 110), Western Civilization (HIS 111), Applied Calculus (MTH 270) or...
This data repository is not currently reporting usage information. For information on how your repository can submit usage information, please see our documentation.

Similitude of Mass Transfer Processes in Distorted Froude Model of an Estuary

Carvel Hall Blair
The project began with the design and construction of a hydraulic Froude model of the Lafayette River, a small well mixed estuary in Norfolk, Virginia. Horizontal scale is 1/540, vertical scale 1/12 yielding a vertical distortion of 45. Adjustment by roughness strips and screens produced close agreement of model-prototype tide heights, currents, and salinities in the deep reaches comprising 80% of the estuary volume. Some scale effect in velocity and tide height could not be...
This data repository is not currently reporting usage information. For information on how your repository can submit usage information, please see our documentation.

Unsteady Transonic Flow Over Slender Bodies

Cevdet Aydun
The unsteady transonic small disturbance equation for an oscillating slender body is obtained from the full potential equation in cylindrical coordinates by means of a perturbation analysis. The time-dependent body-boundary condition is reduced into a simpler form by matching the outer and inner flows. Also, a time-dependent pressure coefficient over the slender body is derived by means of a matching principle. The simplified form of the body-boundary condition is incorporated into the difference equations at...
This data repository is not currently reporting usage information. For information on how your repository can submit usage information, please see our documentation.

The 2H(e, e'p)n Reaction at High Four-Momentum Transfer

Hassan F. Ibrahim
This dissertation presents the highest four-momentum transfer, Q2, quasielastic (xBj = 1) results from Experiment E01-020 which systematically explored the 2H(e, e'p)n reaction ("Electro-disintegration" of the deuteron) at three different four-momentum transfers, Q2 = 0.8, 2.1, and 3.5 GeV2 and missing momenta, pmiss = 0, 100, 200, 300, 400, and 500 GeV including separations of the longitudinal-transverse interference response function, RLT, and extraction of the longitudinal-transverse asymmetry, ALT. This systematic approach will help to understand...
This data repository is not currently reporting usage information. For information on how your repository can submit usage information, please see our documentation.

Registration Year

  • 2013
    1
  • 2016
    3
  • 2017
    3
  • 2018
    3
  • 2019
    852

Resource Types

  • Text
    853
  • Dataset
    10

Affiliations

  • Old Dominion University
    863
  • University of Georgia
    2
  • University of Connecticut
    2
  • Cornell University
    2
  • University of Kansas
    1
  • George Washington University
    1
  • University of California, San Diego
    1
  • University of Alaska Fairbanks
    1
  • University of Delaware
    1
  • University of Gujrat
    1
  • Leiden University
    1
  • University of Oklahoma
    1
  • United States Geological Survey
    1
  • Sukkur IBA University
    1
  • University of Nebraska–Lincoln
    1