Search
Results: 469
Bayesian Spatial Modelling with R-INLA
The principles behind the interface to continuous domain spatial models in the R- INLA software package for R are described. The integrated nested Laplace approximation (INLA) approach proposed by Rue, Martino, and Chopin (2009)...
Bayesian Spatial Modelling with R-INLA
The principles behind the interface to continuous domain spatial models in the R- INLA software package for R are described. The integrated nested Laplace approximation (INLA) approach proposed by Rue, Martino, and Chopin (2009)...
Going off grid
This paper introduces a new method for performing computational inference on log-Gaussian Cox processes. The likelihood is approximated directly by making novel use of a continuously specified Gaussian random field. We show that...
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...
Going off grid
This paper introduces a new method for performing computational inference on log-Gaussian Cox processes. The likelihood is approximated directly by making novel use of a continuously specified Gaussian random field. We show that...
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
Stochastic asymmetry properties of 3D gauss-lagrange ocean waves with directional spreading
In the stochastic Lagrange model for ocean waves the vertical and horizontal location of surface water particles are modeled as correlated Gaussian processes. In this article we investigate the statistical properties of wave...
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....
Stochastic asymmetry properties of 3D gauss-lagrange ocean waves with directional spreading
In the stochastic Lagrange model for ocean waves the vertical and horizontal location of surface water particles are modeled as correlated Gaussian processes. In this article we investigate the statistical properties of wave...
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....
Non-traditional stochastic models for ocean waves
We present two flexible stochastic models for 2D and 3D ocean waves with potential to reproduce severe and non-homogeneous sea conditions. The first family consists of generalized Lagrange models for the movements of individual...
Non-traditional stochastic models for ocean waves
We present two flexible stochastic models for 2D and 3D ocean waves with potential to reproduce severe and non-homogeneous sea conditions. The first family consists of generalized Lagrange models for the movements of individual...
Comments on
Finn Lindgren
Mar 01, 2015
Large spatial data sets require innovative techniques for computationally efficient statistical estimation. In this comment some aspects of local predictor selection are explored, with a view towards spatially coherent field...
Comments on
Finn Lindgren
Mar 01, 2015
Large spatial data sets require innovative techniques for computationally efficient statistical estimation. In this comment some aspects of local predictor selection are explored, with a view towards spatially coherent field...
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
Construction projects as mechanisms for knowledge integration
The aim of this research is to study knowledge integration (KI) when diffusing a systemic innovation. The objectives are to understand what mechanisms are used, and when and what their effects are in terms of knowledge...
Spatial models generated by nested stochastic partial differential equations, with an application to global ozone mapping
A new class of stochastic field models is constructed using nested stochastic partial differential equations (SPDEs). The model class is computationally efficient, applicable to data on general smooth manifolds, and includes...
Diffusion of a systemic innovation
Purpose: The purpose of this paper is to identify factors that influence the diffusion of a systemic innovation in the Swedish construction sector. The focus is on high-rise multi-storey timber housing; the development of which...
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...
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...
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...
|
|< |
< |
1 |