David B. Joyce

ORCID: 0009-0001-9227-7407
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About
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Research Areas
  • Silicon and Solar Cell Technologies
  • Electron and X-Ray Spectroscopy Techniques
  • Advanced Surface Polishing Techniques
  • Solid State Laser Technologies
  • Advanced Electron Microscopy Techniques and Applications
  • Laser Material Processing Techniques
  • Photovoltaic Systems and Sustainability
  • X-ray Spectroscopy and Fluorescence Analysis
  • Chalcogenide Semiconductor Thin Films
  • Advancements in Photolithography Techniques
  • Calibration and Measurement Techniques
  • Marine and coastal plant biology
  • Photocathodes and Microchannel Plates
  • International Maritime Law Issues
  • Laser-Matter Interactions and Applications
  • Particle Detector Development and Performance
  • Optical Coatings and Gratings
  • Legal and Constitutional Studies
  • CCD and CMOS Imaging Sensors
  • History of Science and Natural History
  • Advanced MRI Techniques and Applications
  • Cardiovascular Function and Risk Factors
  • Silicon Effects in Agriculture
  • Surface Roughness and Optical Measurements
  • Laser-Plasma Interactions and Diagnostics

GT Advanced Technologies (United States)
2015

University of Miami
2004

Crystal Research (United States)
2003

University of California, Los Angeles
1995

University Hospitals of Cleveland
1989

10.1016/s0927-0248(02)00051-x article EN Solar Energy Materials and Solar Cells 2002-08-26

Developments in direct electron detector technology have played a pivotal role enabling high-resolution structural studies by cryo-EM at 200 and 300 keV. Yet, theory recent experiments indicate advantages to imaging 100 keV, energies for which the current detectors not been optimized. In this study, we evaluated Gatan Alpine detector, designed operation Compared K3, demonstrated significant DQE improvement these energies, specifically ∼ 4-fold Nyquist single-particle experiments, datasets...

10.1016/j.jsb.2024.108108 article EN cc-by Journal of Structural Biology 2024-06-28

ABSTRACT Developments in direct electron detector technology have played a pivotal role enabling high-resolution structural studies by cryo-EM at 200 and 300 keV. Yet, theory recent experiments indicate advantages to imaging 100 keV, energies for which the current detectors not been optimized. In this study, we evaluated Gatan Alpine detector, designed operation Compared K3, demonstrated significant DQE improvement these voltages, specifically ~4-fold Nyquist single-particle experiments,...

10.1101/2024.02.14.580363 preprint EN cc-by-nd bioRxiv (Cold Spring Harbor Laboratory) 2024-02-18

The growth of the photovoltaic industry will be limited by availability silicon feedstock. Currently, feedstock supplies are scraps and surplus from microelectronics industry. A program has been initiated to produce solar grade (SoG) upgrading metallurgical (MG) using pyrometallurgical techniques in liquid state followed directional solidification. This approach is based on earlier results when all impurities, including B P, were reduced <1 ppm level. It intended analyze data, undertake...

10.1063/1.57941 article EN AIP conference proceedings 1999-01-01

10.4229/24theupvsec2009-2cv.1.42 article EN World Conference on Photovoltaic Energy Conversion 2009-11-18

A simple refining process of blowing moist gases over molten silicon removed high segregation impurities, especially B and P, reduced other impurities. Using this with heavily B-doped (Hi-B) scrap from the electronic industry will double feedstock available to PV short term. When is followed by directional solidification, it can be used for upgrading metallurgical grade (MG) produce solar (SoG) silicon. For long term, total processing in an MG production plant result $10/kg SoG feedstock.

10.1109/pvsc.2002.1190534 article EN 2003-10-31

We surveyed the marine gobies of Malapascua island (Philippines), surrounding islets and nearby Monad shoal. found 59 species in 19 genera, including 2 undescribed genus Trimma , 3 geographic 6 depth range expansions. Furthermore we describe a new type mimicry between goby Koumasetta hectori cardinalfish Apogon nigrofasciatus . The comparison versus shoal fauna showed lesser richness shrimp-associated at This likely reflects fact that hydrodynamic features environment play dominant role...

10.1101/006049 preprint EN cc-by-nc-nd bioRxiv (Cold Spring Harbor Laboratory) 2014-06-06

The most attractive approach to upgrade metallurgical-grade (MG) silicon is chemically refine impurities, especially boron (B) and phosphorus (P), in the molten state followed by directional solidification. problematic impurity B as it has highest segregation coefficient. A simple refining process of blowing gas through melt was developed reduce MG effectively, been scaled up charge sizes 150 kg. reduction maintained with increase confirmed using on B-doped at ten times concentration....

10.1109/pvsc.2000.915750 article EN 2002-11-11

Magneto-rheological finishing (MRF) imprinting techniques have been applied to Ti:sapphire crystals compensate for submillimeter distortions, thereby, improving the transmitted wavefront and increasing availability of large aperture parts.

10.1364/assp.2008.we15 article EN Advanced Solid-State Photonics 2008-01-01

We report on a technique to study the Lorentz effect compensation in muon end-cap cathode strip chambers detectors with solenoidal magnetic fields like GEM and CMS. The method utilizes pulsed UV laser for depositing track-like ionization chamber volume specially designed rotating anode wire frame. optimal angle was measured be 26.6±0.5° 3.4 T field using M1 magnet of RD5 experiment at CERN. results are good agreement simulations.

10.1016/0168-9002(95)00749-0 article EN cc-by-nc-nd Nuclear Instruments and Methods in Physics Research Section A Accelerators Spectrometers Detectors and Associated Equipment 1995-12-01

10.4229/24theupvsec2009-2cv.1.46 article EN World Conference on Photovoltaic Energy Conversion 2009-11-18

Abstract TEM image acquisition is subject to limitations in resolution imposed by the physics of position-sensitive detection process. existing on-line digital cameras consists scintillation, transfer and photon a CCD. Scintillator governed primarily incident beam energy. Material parameters affect only weakly. Some improvement can be made with thin transmission scintillator. Still, backscatter electrons from below form noisy background. Optical also has an important effect on overall camera...

10.1017/s1431927600030622 article EN Microscopy and Microanalysis 2001-08-01
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