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Results: 1160
Abrupt intrinsic and extrinsic responses of southwestern Iberian vegetation to millennial-scale variability over the past 28 ka
A Cutmore, B Ausín, M Maslin, T Eglinton, D Hodell, F Muschitiello, L Menviel, N Haghipour, B Martrat, V Margari, PC Tzedakis
Nov 22, 2021
ABSTRACT: We present new high‐resolution pollen records combined with palaeoceanographic proxies from the same samples in deep‐sea cores SHAK06‐5K and MD01‐2444 on the southwestern Iberian Margin, documenting regional vegetation...
Synchronous volcanic eruptions and abrupt climate change ∼17.7 ka plausibly linked by stratospheric ozone depletion.
Joseph R McConnell, Andrea Burke, Nelia W Dunbar, Peter Köhler, Jennie L Thomas, Monica M Arienzo, Nathan J Chellman, Olivia J Maselli, Michael Sigl, Jess F Adkins, Daniel Baggenstos, John F Burkhart, Edward J Brook, Christo Buizert, Jihong Cole-Dai, TJ Fudge, Gregor Knorr, Hans-F Graf, Mackenzie M Grieman, Nels Iverson, Kenneth C McGwire, Robert Mulvaney, Guillaume Paris, Rachael H Rhodes, Eric S Saltzman, Jeffrey P Severinghaus, Jørgen Peder Steffensen, Kendrick C Taylor, Gisela Winckler
Oct 03, 2018
Glacial-state greenhouse gas concentrations and Southern Hemisphere climate conditions persisted until ∼17.7 ka, when a nearly synchronous acceleration in deglaciation was recorded in paleoclimate proxies in large parts of the...
Study of an overmoded structure for megawatt Ka-band extended interaction klystron
Yifan Zu, Xuesong Yuan, Xiaotao Xu, Qingyun Chen, Matthew T. Cole, Yong Yin, Hailong Li, Bin Wang, Lin Meng, Yang Yan
Oct 31, 2023
For most applications in the millimeter wave band, corresponding to Ka and higher-frequency bands, relatively high atmospheric absorption necessitates the use of high-power sources. Here, a new approach for projecting an...
Study of an overmoded structure for megawatt Ka-band extended interaction klystron
Yifan Zu, Xuesong Yuan, Xiaotao Xu, Qingyun Chen, Matthew T. Cole, Yong Yin, Hailong Li, Bin Wang, Lin Meng, Yang Yan
Oct 31, 2023
For most applications in the millimeter wave band, corresponding to Ka and higher-frequency bands, relatively high atmospheric absorption necessitates the use of high-power sources. Here, a new approach for projecting an...
A Carbon Nanotube-based Hundred Watt-level Ka-band Backward Wave Oscillator
Carbon nanotube (CNT) cold-cathodes hold much promise in a variety of millimeter-wave and terahertz vacuum electronic radiation devices due to their inherent near instantaneous temporal turn-on and near-ideal ideal field...
Backward wave oscillator (BWO) Carbon nanotube (CNT) cold cathode field emission (FE) high power millimeter-wave (MMW) radiation /dk/atira/pure/subjectarea/asjc/2500/2504 name=Electronic, Optical and Magnetic Materials /dk/atira/pure/subjectarea/asjc/2200/2208 name=Electrical and Electronic Engineering
A Carbon Nanotube-based Hundred Watt-level Ka-band Backward Wave Oscillator
Carbon nanotube (CNT) cold-cathodes hold much promise in a variety of millimeter-wave and terahertz vacuum electronic radiation devices due to their inherent near instantaneous temporal turn-on and near-ideal ideal field...
Backward wave oscillator (BWO) Carbon nanotube (CNT) cold cathode field emission (FE) high power millimeter-wave (MMW) radiation /dk/atira/pure/subjectarea/asjc/2500/2504 name=Electronic, Optical and Magnetic Materials /dk/atira/pure/subjectarea/asjc/2200/2208 name=Electrical and Electronic Engineering
Neuroarthropathy in diabetes
Charcot neuroarthropathy is a rare but serious complication of diabetes, causing progressive destruction of the bones and joints of the foot leading to deformity, altered biomechanics and an increased risk of ulceration....
J Mertens, RW Bowman, JCW Willis, A Robinson, D Cotton, R White, KA Seffen, JJ Baumberg
Oct 07, 2015
Poly (4-Vinylpyridine) Synthesis and Solution Properties
Warren L. Robinson, Jr.
Jan 01, 0001
This 28 page thesis reports the synthesis of poly (4-vinylpyridine) by cationic and free radical initiators, concentrated sulfuric acid and benzoylperoxide, respectively. The molecular weights of the various samples were...
Viscosity ionic strength Molecular Weight monomer purification cationic initiation free radical initiation Chemistry Physical Sciences and Mathematics
Published by: Ursinus College
Development of a ka-band circular waveguide TM01-rectangular waveguide TE10 mode converter
Qingyun Chen, Xuesong Yuan, Tongbin Yang, Jie Xie, Xiaotao Xu, Bin Wang, Hailong Li, Yong Yin, Matthew Cole, Lin Meng, Yang Yan
Mar 31, 2020
The output/input circuit is a core component in all high-power millimeter-wave (MMW) radiation sources, and its performance specifications and reliability directly impact upon the performance of the radiation source device....
Development of a ka-band circular waveguide TM01-rectangular waveguide TE10 mode converter
Qingyun Chen, Xuesong Yuan, Tongbin Yang, Jie Xie, Xiaotao Xu, Bin Wang, Hailong Li, Yong Yin, Matthew Cole, Lin Meng, Yang Yan
Mar 31, 2020
The output/input circuit is a core component in all high-power millimeter-wave (MMW) radiation sources, and its performance specifications and reliability directly impact upon the performance of the radiation source device....
The Ursinus Weekly, April 30, 1909
Ernest C. Wagner
Jan 01, 0001
Professor Robinson addresses students Arbor Day observed Students enjoy day of rest on athletic field Handel Choral Club YWCA fete Hone's pictures of the Yellowstone Death Dr. Ralfe addresses students Society notes ...
Ursinus College Collegeville Pennsylvania newspaper James Harvey Robinson baseball YMCA YWCA Schaff literary society Zwinglian literary society cultural history Higher Education Liberal Studies Social History United States History
Published by: Ursinus College
Impact of Self-Directed Learning and Educational Technology Readiness on Synchronous E-Learning
The coronavirus (COVID-19) has had severe global impacts in many aspects of education. Asian countries and regions have been the first responders to move entirely online since the epidemic started. The aim of this paper is...
Published by: IGI Global Scientific Publishing
Inference on modelling cross-sectional dependence for a varying-coefficient model
Bin Peng
Aug 01, 2016
In this note, I have studied a varying-coefficient model under cross-sectional dependence. The technique of Robinson (2011) is employed to mimic the dependence among cross-sectional data sets. The asymptotic normality is...
Winthrop to Host Day of Percussion April 4
Winthrop University
Jan 01, 0001
Events include clinics with She-e Wu, N. Scott Robinson and Omar Carmenates. This is the third time Winthrop has hosted the SCPAS Day of Percussion.
Published by: Winthrop University
Eagles Defeated Coastal Carolina to Win Big South Conference Championship
Winthrop University
Jan 01, 0001
The win nets the Eagles an automatic bid to the NCAA tournament. Senior Mantoris Robinson scored 14 points, and on defense kept Coastal's Joseph Harris to three points and one field goal.
Published by: Winthrop University
Inference on modelling cross-sectional dependence for a varying-coefficient model
Bin Peng
Aug 01, 2016
In this note, I have studied a varying-coefficient model under cross-sectional dependence. The technique of Robinson (2011) is employed to mimic the dependence among cross-sectional data sets. The asymptotic normality is...
A Neolithic expansion, but strong genetic structure, in the independent history of New Guinea.
Anders Bergström, Stephen J Oppenheimer, Alexander J Mentzer, Kathryn Auckland, Kathryn Robson, Robert Attenborough, Michael P Alpers, George Koki, William Pomat, Peter Siba, Yali Xue, Manjinder S Sandhu, Chris Tyler-Smith
Apr 02, 2019
New Guinea shows human occupation since ~50 thousand years ago (ka), independent adoption of plant cultivation ~10 ka, and great cultural and linguistic diversity today. We performed genome-wide single-nucleotide polymorphism...
Remobilization of dormant carbon from Siberian-Arctic permafrost during three past warming events.
Jannik Martens, Birgit Wild, Francesco Muschitiello, Matt O'Regan, Martin Jakobsson, Igor Semiletov, Oleg V Dudarev, Örjan Gustafsson
Oct 20, 2020
Carbon cycle models suggest that past warming events in the Arctic may have caused large-scale permafrost thaw and carbon remobilization, thus affecting atmospheric CO2 levels. However, observational records are sparse...
Human occupation of northern India spans the Toba super-eruption ~74,000 years ago.
Chris Clarkson, Clair Harris, Bo Li, Christina M Neudorf, Richard G Roberts, Christine Lane, Kasih Norman, Jagannath Pal, Sacha Jones, Ceri Shipton, Jinu Koshy, MC Gupta, DP Mishra, AK Dubey, Nicole Boivin, Michael Petraglia
Mar 16, 2020
India is located at a critical geographic crossroads for understanding the dispersal of Homo sapiens out of Africa and into Asia and Oceania. Here we report evidence for long-term human occupation, spanning the last ~80 thousand...
Effect of Knowledge Application and Knowledge Storage on Bank Performance Through Fintech Innovation
Yemeni banks are generally performing well in terms of their operations, but their performance needs to be enhanced and developed using knowledge management as there haven't been many studies done yet on them. This article...
Published by: IGI Global Scientific Publishing
Human occupation of northern India spans the Toba super-eruption ~74,000 years ago
Chris Clarkson, Clair Harris, Bo Li, Christina M. Neudorf, Richard G. Roberts, Christine Lane, Kasih Norman, Jagannath Pal, Sacha Jones, Ceri Shipton, Jinu Koshy, M. C. Gupta, D. P. Mishra, A. K. Dubey, Nicole Boivin, Michael Petraglia
Feb 24, 2021
Abstract: India is located at a critical geographic crossroads for understanding the dispersal of Homo sapiens out of Africa and into Asia and Oceania. Here we report evidence for long-term human occupation, spanning the last...
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