Skip to main content

19 Result(s)

within J.M. Pearce Remove this filter

and

  1. Article

    Open Access

    Asymmetry in the discrimination of quantity by rats: The role of the intertrial interval

    In three experiments, rats were trained to discriminate between 20 and five (Exps. 1 and 2), or between 40 and five (Exp. 3), black squares. The squares were randomly distributed in the center of a white backg...

    R. A. Inman, R. C. Honey, G. L. Eccles, J. M. Pearce in Learning & Behavior (2016)

    Download PDF (728 KB) View Article

  2. No Access

    Article

    Innovation through collaboration: scaling up solutions for sustainable development

    The open collaborative philosophy employed in the success of open source (OS) software can be applied to hardware design. Specifically, the development of OS appropriate technologies (OSAT) can improve sustain...

    I. Zelenika, J. M. Pearce in Environment, Development and Sustainability (2014)

  3. No Access

    Article

    Distributed Recycling of Post-Consumer Plastic Waste in Rural Areas

    Although the environmental benefits of recycling plastics are well established and most geographic locations within the U.S. offer some plastic recycling, recycling rates are often low. Low recycling rates are...

    M. Kreiger, G. C. Anzalone, M. L. Mulder, A. Glover… in MRS Online Proceedings Library (2012)

  4. No Access

    Article

    Carrier Transport and Recombination In A-SI:H P-I-N Solar Cells in Dark and Under Illumination

    A study has been carried out on the forward bias dark current and the short circuit current -open circuit voltage characteristics of a-Si:H p-i-n solar cells over wide range of illumination intensities. Result...

    J. Deng, J. M. Pearce, V. Vlahos, R. J. Koval… in MRS Online Proceedings Library (2011)

  5. No Access

    Article

    Protocrystalline Si:H p-type Layers for Maximization of the Open Circuit Voltage in a-Si:H n-i-p Solar Cells

    We have revisited the issue of p-layer optimization for amorphous silicon (a-Si:H) solar cells, correlating spectroscopic ellipsometry (SE) measurements of the p-layer in the device configuration with light cu...

    R. J. Koval, Chi Chen, G. M. Ferreira, A. S. Ferlauto… in MRS Online Proceedings Library (2011)

  6. No Access

    Article

    Evolution of Crystallinity in Mixed-Phase (a+μc)-Si:H as Determined by Real Time Spectroscopic Ellipsometry

    The ability to characterize the phase of the intrinsic (i) layers incorporated into amorphous silicon [a-Si:H] and microcrystalline silicon [μc-Si:H] thin film solar cells is critically important for cell opti...

    A. S. Ferlauto, G. M. Ferreira, R. J. Koval, J. M. Pearce… in MRS Online Proceedings Library (2011)

  7. No Access

    Article

    Recombination in n-i-p (Substrate) a-Si:H Solar Cells with Silicon Carbide and Protocrystalline p-Layers

    A study was carried out on hydrogenated amorphous silicon (a-Si:H) n-i-p (substrate) solar cell structures with p-a-SiC:H and highly diluted p-Si:H layers grown with different dilution ratios R=[H2]/[SiH4]. The c...

    V. Vlahos, J. Deng, J. M. Pearce, R. J. Koval… in MRS Online Proceedings Library (2011)

  8. No Access

    Article

    Light Induced Defect Creation Kinetics in Thin Film Protocrystalline Silicon Materials and Their Solar Cells

    Using real time spectroscopic ellipsometry to characterize the microstructure and evolutionary growth of Si:H materials deposited with and without hydrogen dilution, phase diagrams were developed which clearly...

    C. R. Wronski, J. M. Pearce, R. J. Koval, X. Niu… in MRS Online Proceedings Library (2011)

  9. No Access

    Chapter and Conference Paper

    WHAT CAN WE LEARN FROM NATURAL ANALOGUES?

    The timescales needed for the geological storage of carbon dioxide (CO2) are potentially thousands of years. Therefore, before large-scale underground CO2 storage can take place, it will be necessary to demonstra...

    J. M. Pearce in Advances in the Geological Storage of Carbon Dioxide (2006)

  10. No Access

    Article

    The Nature of Native and Light Induced Defect States in i-layers of High Quality a-Si:H Solar Cells Derived from Dark Forward-Bias Current-Voltage Characteristics

    Results are presented on the defect state distributions in intrinsic a-Si:H layers with and without hydrogen dilution in p-i-n solar cells obtained directly from the analysis of dark forward-bias current-volta...

    J. Deng, M. L. Albert, J. M. Pearce, R. W. Collins… in MRS Online Proceedings Library (2004)

  11. No Access

    Article

    The Creation and Annealing Kinetics of Fast Light Induced Defect States created by 1 Sun Illumination in a-Si:H

    Preliminary results are presented on the kinetics of fast states at 25°C created by 1 sun illumination in protocrystalline hydrogen diluted a-Si:H films. The results are for the bulk properties of the a-Si:H f...

    M.L. Albert, J. Deng, X. Niu, J.M. Pearce, R.W. Collins… in MRS Online Proceedings Library (2004)

  12. No Access

    Article

    Characterization of the Bulk Recombination in Hydrogenated Amorphous Silicon Solar Cells

    Dark forward bias current, JD-V, characteristics offer a probe for characterizing carrier recombination and the defect states in the intrinsic layers of hydrogenated amorphous silicon (a-Si:H) solar cells. Detail...

    J. Deng, J. M. Pearce, V. Vlahos, R. W. Collins… in MRS Online Proceedings Library (2003)

  13. No Access

    Article

    Evolution of D0 and non-D0 Light Induced Defect States in a-Si:H Materials and Their Respective Contribution to Carrier Recombination

    A study has been carried out on the evolution of light induced defects in protocrystalline (diluted) a-Si:H films under 1 sun illumination. A room temperature reversal is observed in the photocurrents at 25 °C...

    J. M. Pearce, J. Deng, V. Vlahos, R. W. Collins… in MRS Online Proceedings Library (2003)

  14. No Access

    Article

    Comparison of Phase Diagrams for vhf and rf Plasma-Enhanced Chemical Vapor Deposition of Si:H Films

    Deposition phase diagrams are convenient for categorizing the evolution of the surface microstructure and phase with accumulated thickness for hydrogenated silicon (Si:H) films during plasma-enhanced chemical ...

    G. M. Ferreira, A. S. Ferlauto, J. M. Pearce… in MRS Online Proceedings Library (2003)

  15. No Access

    Article

    Contaminant Source Apportionment by Pimms Lead Isotope Analysis and Sem-Image Analysis

    By combining scanning electron microscopy (SEM) image analysis and laser ablation plasma ionisation multi-collector mass spectrometry (LA-PIMMS), high precision lead isotope analyses can be obtained from indiv...

    R.A.R. McGill, J.M. Pearce, N.J. Fortey, J. Watt… in Environmental Geochemistry and Health (2003)

  16. No Access

    Article

    Evolution of the Mobility Gap with Thickness in Hydrogen-Diluted Intrinsic Si:H Materials in the Phase Transition Region and Its Effect on p-i-n Solar Cell Characteristics

    Insights into the growth processes and evolution of microstructure in intrinsic hydrogenated silicon (Si:H) films obtained from real-time spectroscopic ellipsometry (RTSE) are extended to the characterization ...

    R. J. Koval, J. M. Pearce, A. S. Ferlauto, R. W. Collins… in MRS Online Proceedings Library (2000)

  17. No Access

    Article

    Numerical Modeling and Column Experiments to Simulate the Alkaline Disturbed Zone Around a Cementitious Radioactive Waste Repository

    In order to be able to describe the migration of an alkaline plume, coupled chemistry and flow computer models may be employed. A series of laboratory column experiments were conducted to test the capabilities...

    K. Bateman, P. Coombs, D. J. Noy, J. M. Pearce… in MRS Online Proceedings Library (1997)

  18. No Access

    Chapter and Conference Paper

    Pelvic Inflammatory Disease — An Overview

    Pelvic inflammatory disease (PID) is inflammation of the upper female genital tract. The disorder includes endometritis, sal**itis, sal**o-oophoritis together with spread as peritonitis and along the parac...

    J. M. Pearce in The Fallopian Tube (1994)

  19. No Access

    Article

    Uranium-mineralized micro-organisms associated with uraniferous hydrocarbons in southwest Scotland

    THE ability of microorganisms such as bacteria and fungi to concentrate uranium and other metals from solution has long been recognized (see, for example, refs 1–10), and has previously been applied to the eco...

    A. E. Milodowski, J. M. West, J. M. Pearce, E. K. Hyslop, I. R. Basham… in Nature (1990)