Article
Geology
Rebecca G. Englert, Age J. Vellinga, Matthieu J. B. Cartigny, Michael A. Clare, Joris T. Eggenhuisen, Stephen M. Hubbard
Summary: Submarine channels, like river channels, have the ability to transport sediment. However, their sediment transport and bed-form development are not well understood. A depth-resolved numerical model was used to test the role of flow parameters in controlling the formation of bed forms in submarine channels. It was found that the concentration of sediment in turbidity currents is the strongest predictor of upstream-migrating bed-form formation.
Article
Geology
Rebecca G. Englert, Stephen M. Hubbard, Matthieu J. B. Cartigny, Michael A. Clare, Daniel S. Coutts, Sophie Hage, John Hughes Clarke, Zane Jobe, D. Gwyn Lintern, Cooper Stacey, Daniela Vendettuoli
Summary: This study explores the formation and evolution of cyclic steps in deep-water sedimentary rocks through sedimentological and quantitative three-dimensional architectural analyses of modern and ancient datasets. It reveals similarities in deposit dimensions, facies, and architecture across different turbidite-dominated settings and timescales, shedding light on the stratigraphic expression of small-scale, sandy upslope-migrating bedforms on the seafloor.
Article
Geosciences, Multidisciplinary
Alexandre Normandeau, Patrick Lajeunesse, Jean-Francois Ghienne, Pierre Dietrich
Summary: High-resolution imagery of modern active turbidite systems reveals detailed information about the morphology and behavior of turbidity currents. This study presents a dataset obtained from an autonomous underwater vehicle with 30 cm-resolution, which provides new insights into the erosional and depositional processes associated with turbidity currents. The imagery shows the impact of basal layer erosion, the formation of plunge pools, and the influence of hydraulic jump troughs on flow paths. Additionally, small-scale scours suggest that weak flows follow local relief and explain the variability of flow indicators observed in outcrops.
GEOPHYSICAL RESEARCH LETTERS
(2022)
Article
Geosciences, Multidisciplinary
Zhuyuan Wu, Norihiro Izumi
Summary: In this study, a mathematical model is used to explain the formation of cyclic steps caused by long-runout turbidity currents, and the dimensions of the steps are determined based on the solution. The predictions are found to be reasonably consistent with field observations.
Article
Environmental Sciences
Peng Hu, Yue Li, Chenglin Gong, Wei Li
Summary: Based on previous quantitative studies, this research applied a numerical model to simulate the interaction of turbidity currents, sediment transport, and cyclic steps in the Rio Muni Basin off the West Africa margin. It found that smaller turbidity currents can produce cyclic steps through deceleration. Although the values of derived physical parameters differ quantitatively from previous estimations, their qualitative variation trends are basically the same.
INTERNATIONAL JOURNAL OF SEDIMENT RESEARCH
(2023)
Article
Geosciences, Multidisciplinary
Yufeng Li, Renhai Pu, Gongcheng Zhang, Xueqin Zhao, Yamo Li
Summary: This study uses 3D seismic data from the Beijiao sag of the southern Qiongdongnan basin to document the characteristics and evolution of small-scale unidirectionally upstream-migrating turbidite channels (UUMTCs). The results show that these UUMTCs are smaller in size compared to normal UDMTCs and are influenced by various factors such as sediment supply, sea level fluctuation, contour currents, and local slope configuration. The study provides insights into the formation and evolution of UUMTCs.
MARINE AND PETROLEUM GEOLOGY
(2022)
Article
Optics
Yiqun Ji, Chenxin Zeng, Fenli Tan, Anwei Feng, Jizhou Han
Summary: This paper investigates the impact of aperture stop position on vignetting and local aberrations in monocentric cascade imaging system (MCIS). By introducing aspheric surfaces on proper surfaces, an MCIS with uniform illumination and good image quality is achieved.
Article
Geology
Vittorio Maselli, Aaron Micallef, Alexandre Normandeau, Davide Oppo, David Iacopini, Andrew Green, Zhiyuan Ge
Summary: This study investigates the influence of tectonically controlled topography on deep-water sedimentary systems using 3-D seismic reflection data, showing that spatial variations in topography can lead to different bedforms in different regions. The research also demonstrates how active normal faulting triggers hydraulic jumps that impact flow velocity downstream, affecting the formation of bedforms.
Article
Geology
Yue Sun, Dawei Wang, Miquel Canals, Tiago M. Alves, Weiwei Wang, Yousheng Zhu, Yongpeng Qin, Fanchang Zeng, Yu Zheng
Summary: This study utilizes a high-resolution dataset to analyze the bedform sets in a submarine canyon in the South China Sea. The results reveal the presence of cyclic steps and furrow fields, providing insights into their formation and evolution.
Article
Engineering, Electrical & Electronic
Chia-Hsing Lin, Hao-Sheng Zhang, Chia-Ping Lin, Guo-Dung J. Su
Summary: In this study, a MEMS LiDAR system was designed and demonstrated, which combines a MEMS mirror and a wide-angle lens to achieve a small-sized LiDAR system with a large field-of-view. Through optical simulation and experimental demonstration, the functionality and performance of the system were validated, proving the feasibility of the proposed LiDAR system.
IEEE SENSORS JOURNAL
(2022)
Article
Multidisciplinary Sciences
Kevin Cronin, Shane Foley, Sean Cournane, Giuseppe De Vito, Eamonn Delahunt
Summary: The intra-rater reliability of static wide field of view ultrasound in quantifying the architectural characteristics of the hamstring muscles in male amateur athletes was assessed. The results showed that the architectural characteristics can be reliably quantified using static wide field of view ultrasound.
Article
Optics
Fu-Hao Chen, Byung-Ryool Hyun, Zhaojun Liu
Summary: Using thin-encapsulated self-emissive displays like OLEDs can widen the FOV and improve the user experience in LFD mobile applications. By aligning sub-pixels into a single column and using a moire-free parallax barrier, the spatial resolution and motion parallax of LFD can be enhanced significantly. The crosstalk effects caused by wide slits on the 3D image quality are also analyzed in the study.
Article
Optics
L. Liu, X. F. He, D. L. Yu, Z. B. Shi, J. Lu, F. Xia, D. L. Zheng, N. Zhang, X. X. He, Y. L. Wei, L. G. Zang, Z. C. Yang, L. W. Yan, Yi Liu, Q. W. Yang
Summary: The wide-angle view imaging system for HL-2M tokamak's first plasma consists of tangential view and downward-looking diagnostic, featuring a flexible optical structure and high spatial resolution.
Article
Geosciences, Multidisciplinary
Zachary T. Sickmann, John W. Snedden
Summary: The study utilized newly available two-dimensional and limited three-dimensional seismic data, combined with well and core data, to reveal the basin evolution model of the deep-water Neogene to recent southern Gulf of Mexico. The tectonic drivers such as dynamic uplift, transpression, and salt tectonics led to collapse of the basin margins and limited sediment transport into the deep basin. Additionally, the newly developed nearshore sediment systems affected sediment input into the deep basin.
Article
Engineering, Electrical & Electronic
Bing Zhang, Jian Ren, Tao Yin, Yan-Ting Liu, Ying Liu, Yingzeng Yin
Summary: This article presents a wide-beam dielectric resonator antenna (DRA) and its related phased array with wide-angle scanning. The wide-beam method improves scanning coverage and cross polarization discrimination (XPD) by utilizing dual magnetic currents (MCs) in the same direction. The theoretical analysis and experimental results prove the effectiveness of the wide-beam method in improving the beam scanning angle and stability of the antenna system.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2022)
Article
Geochemistry & Geophysics
C. K. Paull, S. R. Dallimore, D. W. Caress, R. Gwiazda, H. Melling, M. Riedel, Y. K. Jin, J. K. Hong, Y. -G. Kim, D. Graves, A. Sherman, E. Lundsten, K. Anderson, L. Lundsten, H. Villinger, A. Kopf, S. B. Johnson, J. Hughes Clarke, S. Blasco, K. Conway, P. Neelands, H. Thomas, M. Cote
GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS
(2015)
Article
Geography, Physical
B. MacLean, S. Blasco, R. Bennett, T. Lakeman, J. Hughes-Clarke, P. Kuus, E. Patton
QUATERNARY SCIENCE REVIEWS
(2015)
Article
Geochemistry & Geophysics
M. A. Clare, J. E. Hughes Clarke, P. J. Talling, M. J. B. Cartigny, D. G. Pratomo
EARTH AND PLANETARY SCIENCE LETTERS
(2016)
Article
Geography, Physical
B. MacLean, S. Blasco, R. Bennett, T. Lakeman, A. J. Pienkowski, M. F. A. Furze, J. Hughes Clarke, E. Patton
QUATERNARY SCIENCE REVIEWS
(2017)
Article
Geosciences, Multidisciplinary
J. L. Hizzett, J. E. Hughes Clarke, E. J. Sumner, M. J. B. Cartigny, P. J. Talling, M. A. Clare
GEOPHYSICAL RESEARCH LETTERS
(2018)
Article
Oceanography
Caroline Lavoie, Jose A. Jimenez, Miquel Canals, Galderic Lastras, Ben De Mol, David Amblas, Camino Liquete, Marc De Batist, John E. Hughes Clarke
CONTINENTAL SHELF RESEARCH
(2014)
Article
Geosciences, Multidisciplinary
G. Lastras, M. Canals, D. Amblas, C. Lavoie, I. Church, B. De Mol, R. Duran, A. M. Calafat, J. E. Hughes-Clarke, C. J. Smith, S. Heussner
Article
Geosciences, Multidisciplinary
Laura L. Brothers, Joseph T. Kelley, Daniel F. Belknap, Walter A. Barnhardt, Brian D. Andrews, Christine Legere, John E. Hughes Clarke
Article
Geosciences, Multidisciplinary
A. Normandeau, P. Dietrich, J. Hughes Clarke, W. Van Wychen, P. Lajeunesse, D. Burgess, J. -F. Ghienne
JOURNAL OF GEOPHYSICAL RESEARCH-EARTH SURFACE
(2019)
Article
Geosciences, Multidisciplinary
Sophie Hage, Matthieu J. B. Cartigny, Esther J. Sumner, Michael A. Clare, John E. Hughes Clarke, Peter J. Talling, D. Gwyn Lintern, Stephen M. Simmons, Ricardo Silva Jacinto, Age J. Vellinga, Joshua R. Allin, Maria Azpiroz-Zabala, Jenny A. Gales, Jamie L. Hizzett, James E. Hunt, Alessandro Mozzato, Daniel R. Parsons, Ed L. Pope, Cooper D. Stacey, William O. Symons, Mark E. Vardy, Camilla Watts
GEOPHYSICAL RESEARCH LETTERS
(2019)
Article
Geology
Rebecca G. Englert, Stephen M. Hubbard, Matthieu J. B. Cartigny, Michael A. Clare, Daniel S. Coutts, Sophie Hage, John Hughes Clarke, Zane Jobe, D. Gwyn Lintern, Cooper Stacey, Daniela Vendettuoli
Summary: This study explores the formation and evolution of cyclic steps in deep-water sedimentary rocks through sedimentological and quantitative three-dimensional architectural analyses of modern and ancient datasets. It reveals similarities in deposit dimensions, facies, and architecture across different turbidite-dominated settings and timescales, shedding light on the stratigraphic expression of small-scale, sandy upslope-migrating bedforms on the seafloor.
Article
Geosciences, Multidisciplinary
Alexandre Normandeau, Kevin MacKillop, Meaghan Macquarrie, Clark Richards, Daniel Bourgault, D. Calvin Campbell, Vittorio Maselli, Genevieve Philibert, John Hughes Clarke
Summary: This article discusses how iceberg gouging of continental slopes can lead to submarine landslides, even far from the iceberg source region. By analyzing an event in a Baffin Island fjord, it is shown that icebergs can affect the seafloor at depths greater than their keel depth, triggering submarine landslides. The findings suggest that icebergs from the Arctic, Greenland, and Antarctica can pose hazards thousands of kilometers away and impact continental slopes by initiating submarine landslides, particularly with increased iceberg discharge due to climate change.
Article
Geosciences, Multidisciplinary
John E. Hughes Clarke
Proceedings Paper
Engineering, Geological
John E. Hughes Clarke, Carlos R. Vidiera Marques, Danar Pratomo
SUBMARINE MASS MOVEMENTS AND THEIR CONSEQUENCES: 6TH INTERNATIONAL SYMPOSIUM
(2014)