604 research outputs found
Author Correction: Strong correlations and orbital texture in single-layer 1T-TaSe2
No full textIn the version of this Article previously published, co-author Ryan L. Lee was missing the middle initial. This has now been corrected in the online versions
[Comment on] Daniela F. Sieff, Laura Betzig, Lee Cronk, Alan G. Fix, Mark Flinn, Lisa Sattenspiel, Kathleen Gibson, D. Ann Herring, Nancy Howell, S. Ryan Johansson, Zdenĕk Pavlík, John W. Sheets, Eric Alden Smith, Eckart Voland, and Eva Siegelkow. (1990). "Explaining Biased Sex Ratios in Human Populations: A Critique of Recent Studies." Current Anthropology 31(1)
No full textPeer reviewedOpen peer commentary on an article in the same issue (p. 25-48, https://doi.org/10.1086/203801
2024-2025: Distinguished Visiting Author, Elisa Gonzalez
No full textStudent Fellows: Benjamin Harvey, Abigail Lebowitz, Aelan Lee, May Mastrantonio, Ryan Robertsonhttps://docs.rwu.edu/bermont-fellowship/1011/thumbnail.jp
2024-2025: Distinguished Visiting Author, Elisa Gonzalez
No full textStudent Fellows: Benjamin Harvey, Abigail Lebowitz, Aelan Lee, May Mastrantonio, Ryan Robertsonhttps://docs.rwu.edu/bermont-fellowship/1011/thumbnail.jp
Dynamics of the Wave-Driven Circulation in the Lee of Nearshore Reefs
No full textNearshore rocky reefs with scales of order 10–100 m are common along the world's coastline and often shape wave-driven hydrodynamics and shoreline morphology in their lee. The interaction of waves with these reefs generally results in either two or four-cell mean circulation systems (2CC and 4CC, respectively), with diverging flows behind the reefs and at the shoreline in the 2CC case and flows that diverge in the lee and converge at the shoreline in the 4CC case. By applying a phase-resolving wave-flow model to conduct a detailed analysis of mean momentum balances for waves interacting with nearshore reefs, we develop an understanding of the drivers of 2CC and 4CC flow dynamics and how they vary for different reef geometries and wave and water level conditions. The 2CC or 4CC patterns were primarily driven by alongshore pressure gradients toward the exposed (nonreef fronted) or reef-fronted beach. These alongshore pressure gradients were dependent on the cross-shore setup dynamics governed by the balance between pressure (i.e., related to the setup) and radiation stress gradients, and mean bottom stresses exerted on the water column. If shoreline wave setup in the lee of the reef was less than the exposed beach, a 4CC pattern developed with convergent flow at the shoreline in the lee of the reef; otherwise, a 2CC emerged with divergent flow at the shoreline. Across the parameter space investigated, reef roughness, distance to the shoreline, and beach slope were the three parameters most likely to change the flow patterns between 2CC and 4CC.</p
Parameterizing the Dust Around Herbig Ae/Be Stars: Multiwavelength Imaging, Radiative Transfer Modeling, and Near-Infrared Instrumentation
No full text150 p.Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 2008.In order to advance the imaging capabilities available for observations of Herbig Ae/Be stars, I have participated in the development of the WIYN High Resolution Infrared Camera. The instrument operates in the near-infrared (∼0.8 -- 2.5 mum), includes 13 filters, and has a pixel size of ∼0.1&inches;, resulting in a field of view of ∼3' x 3'. An angular resolution of ∼0.25&inches; is anticipated. I provide an overview of the instrument, and report performance results with an emphasis on detector characterization.U of I OnlyRestricted to the U of I community idenfinitely during batch ingest of legacy ETD
Parameterizing the Dust Around Herbig Ae/Be Stars: Multiwavelength Imaging, Radiative Transfer Modeling, and Near-Infrared Instrumentation
No full textIn order to advance the imaging capabilities available for observations of Herbig Ae/Be stars, I have participated in the development of the WIYN High Resolution Infrared Camera. The instrument operates in the near-infrared (∼0.8 -- 2.5 mum), includes 13 filters, and has a pixel size of ∼0.1&inches;, resulting in a field of view of ∼3' x 3'. An angular resolution of ∼0.25&inches; is anticipated. I provide an overview of the instrument, and report performance results with an emphasis on detector characterization.Made available in DSpace on 2015-09-25T20:03:08Z (GMT). No. of bitstreams: 2
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Previous issue date: 2008Embargo set by: Seth Robbins for item 81859
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Reason: Restricted to the U of I community idenfinitely during batch ingest of legacy ETDsRestricted to the U of I community idenfinitely during batch ingest of legacy ETDsU of I Only150 p.Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 2008
Structure of the polar electrojet antenna
No full textThesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2003.Includes bibliographical references (p. 153-156).This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.Field experiments were performed in Gakona, Alaska in August and November 2002. The ionospheric conductivity was periodically perturbed using amplitude-modulated radiation from the HAARP HF transmitter (1 MW power, 14 dB gain, 3.3-5.8 MHz carrier, 0.1-40 kHz modulation). The conductivity perturbations lead to perturbations to the natural flow of electrojet current in the lower ionosphere, resulting in ELF/VLF radiation at the modulation frequency. Measurements of the radiation, along with analytic and numerical models, suggest that a vertical loop with a scale size of 10 km is the dominant current structure excited during the experiments.by Ryan James Riddolls.Ph.D
The influence of submerged coastal structures on nearshore flows and wave runup
No full textEngineered and natural submerged coastal structures (e.g., submerged breakwaters and reefs) modify incident wave fields and thus can alter hydrodynamic processes adjacent to coastlines. Although submerged structures are generally assumed to promote beach protection by dissipating waves offshore and creating sheltered conditions in their lee, their interaction with waves can result in mean wave-driven circulation patterns that may either promote shoreline accretion or erosion. Here, we analyse the mean flow patterns and shoreline water levels (wave runup) in the lee of idealised impermeable submerged structures with a phase-resolved nonhydrostatic numerical model. Waves propagating over submerged structures can drive either a 2-cell mean (wave-averaged) circulation, which is characterised by diverging flows behind the structure and at the shoreline, or 4-cell circulation, with converging flows at the shoreline and diverging flows in the immediate lee of the structure. The numerical results show that the mode of circulation can be predicted with a set of relationships depending on the incoming wave heights, the structure crest level, and distance to the shoreline (or structure depth). Qualitative agreement between the mean flow and proxies for the sediment transport using an energetics approach suggest that the mean flow can be a robust proxy for inferring sediment transport patterns. For the cases considered, the submerged structures had a minimal influence on shoreline wave setup and wave runup despite the wave energy dissipation by the structures due to alongshore wave energy fluxes in the lee. Consequently, these results suggest that the coastal protection provided by the range of impermeable submerged structures we modelled is primarily due to their capacity to promote beach accretion.Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.Environmental Fluid Mechanic
Method development and generation of profiles for selected phenolics from apple cultivars used for processed products
No full textProfiles of selected phenolic constituents of 2 apple cultivars, Northern Spy and Ida Red, commonly used for processed products Were compared. Although chlorogenic acid was the principal phenolic in both cultivars, there were significant quantitative differences. A new solid-phase extraction (SPE) and high-performance liquid chromatographic (HPLC) separation using polymeric resins was developed for this experiment. Quantification was by ultra-violet (UV) absorbance using a diode array detector. The performance of this new method was compared with that of a published liquid-liquid extraction (LLE) method, based on linearity of detector response, limits of detection, reproducibility of analysis, and recoveries from spiked apple samples.PT: J; CR: *SAS I INC, 1999, SAS ONL DOC VERS 8 AGBOREGBE T, 1990, J SCI FOOD AGR, V51, P215 AMIOT MJ, 1992, J FOOD SCI, V57, P958 AMIOT MJ, 1993, ACTA HORTIC, V343, P67 ANDRADE PB, 1998, J AGR FOOD CHEM, V46, P968 AWAD MA, 2000, SCI HORTIC-AMSTERDAM, V83, P249 BILYK A, 1988, J LIQ CHROMATOGR, V11, P2829 BURDA S, 1990, J AGR FOOD CHEM, V38, P945 CILLIERS JJL, 1990, J FOOD SCI, V55, P1458 COSETENG MY, 1987, J FOOD SCI, V52, P985 ESCARPA A, 1999, J CHROMATOGR A, V830, P301 JAWORSKI AW, 1987, J AGR FOOD CHEM, V35, P257 LEE CY, 1987, AM J ENOL VITICULT, V38, P277 LEE HS, 1996, HDB FOOD ANAL, V1, P821 LEE HS, 2000, FOOD ANAL HPLC, P775 LISTER CE, 1994, J SCI FOOD AGR, V64, P155 MACHEIX JJ, 1990, FRUIT PHENOLICS, P1 MARQUES L, 1995, ENZYMATIC BROWNING I, P90 MARTINEZ MV, 1995, TRENDS FOOD SCI TECH, V6, P195 MATHEIS G, 1984, J FOOD BIOCHEM, V8, P137 MCRAE KB, 1990, J SCI FOOD AGR, V50, P329 MURATA M, 1995, J JPN SOC FOOD SCI, V42, P820 OSZMIANSKI J, 1990, AM J ENOL VITICULT, V41, P204 PEREZILZARBE J, 1991, Z LEBENSM UNTERS FOR, V192, P551 PODSEDEK A, 2000, EUR FOOD RES TECHNOL, V210, P268 SINGLETON VL, 1986, PHYTOCHEMISTRY, V25, P2127 SPANOS GA, 1990, J AGR FOOD CHEM, V38, P1572 SPANOS GA, 1992, J AGR FOOD CHEM, V40, P1478 TOMASLORENTE F, 1992, J AGR FOOD CHEM, V40, P1800 VAMOSVIGYAZO L, 1981, CRC CRIT REV FOOD SC, V15, P49 WALKER JRL, 1995, ENZYMATIC BROWNING I, P8 WHITAKER JR, 1995, ENZYMATIC BROWNING I, P2 WILSON EL, 1981, J SCI FOOD AGR, V32, P257 ZAWISTOWSKI J, 1991, OXIDATIVE ENZYMES FO, P217; NR: 34; TC: 0; J9: J FOOD SCI; PG: 8; GA: 615PDSource type: Electronic(1
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