Results 131 to 140 of about 574,019 (245)

Precise positioning in real-time using GPS-RTK signal for visually impaired people navigation system [PDF]

, 2010
This thesis was submitted for the degree of Doctor of Philosophy and awarded by Brunel University, 24/9/2010.This thesis presents the research carried out to investigate and achieve highly reliable and accurate navigation system of guidance for visually ...
Al-Salihi, Nawzad Kameran
core   +1 more source

How Much Water Can Be Seasonally Buffered by China's Largest Floodplain Lake? A Refined Estimate From SWOT

Geophysical Research Letters, Volume 53, Issue 17, 16 September 2026.
Abstract Poyang Lake, China's largest floodplain lake, plays a crucial role in regional hydrology by seasonally regulating water to mitigate floods and sustain extensive wetland ecosystems. However, complex hydrodynamics and significant spatial hydraulic gradients often invalidate the traditional “flat‐water” assumption, making reliable estimation of ...
Lingyang Liu, Kai Liu, Jida Wang, Tan Chen, Pengfei Zhan, Yi Peng, Zhiqiang Tan, Chunqiao Song   +7 more
wiley   +1 more source

Interannual Variability of Compound Hot‐Dry Events Over the Tibetan Plateau

Journal of Geophysical Research: Atmospheres, Volume 131, Issue 17, 16 September 2026.
Abstract Associated with a warming tendency, a large variability of compound hot‐dry events (CHDEs) is evident in the Tibetan Plateau (TP), but the underlying mechanisms remain poorly understood. In this study, we analyze the interannual variability of summer CHDEs over the TP, identify the key large‐scale climate drivers, and reveal the dominant ...
Rongyun Pan, Tianjun Zhou, Kexin Gui, Lixia Zhang, Wenxia Zhang, Jie Jiang   +5 more
wiley   +1 more source

The sand grain and the butterfly. Instability in geodesy and geophysics

, 1997
The problems of convergence of series in celestial mechanics and of certain series in geodesy (Molodensky's series and spherical harmonics) show similar features, involving a curious instability. This is imaginatively expressed as the « butterfly effect»
Moritz, H.
core   +1 more source

Inverting vertical gravity anomaly gradients using multidirectional data from a mean sea surface model: the case of the Arabian Sea

Earth, Planets and Space
Advancements in satellite altimetry have significantly enhanced high-resolution mean sea surface (MSS) models, enabling the computation of high-resolution vertical gravity anomaly gradient (VGAG) models.
Ruichen Zhou, Xin Liu, Jinyun Guo, Cheinway Hwang, Yongjun Jia, Xiaotao Chang, Heping Sun   +6 more
doaj   +1 more source

Overcoming the Phase Discontinuity Problem in RIS Optimization: A Robust and Scalable Phase‐Aware Deep Regression Framework via Hybrid CNN–LSTM Architecture

Advanced Intelligent Systems, Volume 8, Issue 9, September 2026.
The phase discontinuity problem—where the cyclic nature of phase angles causes catastrophic errors near the ±π boundary—is a fundamental obstacle in learning‐based reconfigurable intelligent surface (RIS) optimization. A phase‐aware hybrid CNN–LSTM framework resolves this by decomposing phase predictions into sine–cosine components, mapping circular ...
Seda Savaşçı Şen, Ali Çalhan, Murtaza Cicioğlu, Oğuzhan Demiryürek   +3 more
wiley   +1 more source

Implications of a fuel spill in the Bering and Chukchi Seas for two sentinel marine species: A simulation study

Ecological Applications, Volume 36, Issue 6, September 2026.
Abstract Sea‐ice decline has opened Arctic shipping routes lengthening the maritime transit season. Along the Northern Sea Route (NSR), vessel traffic is projected to increase primarily from natural resource development‐related traffic. The NSR traverses the range of the Chukchi Sea (CS) polar bear (Ursus maritimus) subpopulation, and Pacific walrus ...
Susannah P. Woodruff, Ryan R. Wilson, Irina S. Trukhanova, Deborah P. French‐McCay, Matthew Frediani   +4 more
wiley   +1 more source

Seroprevalence of Lumpy Skin Disease and Livestock Owners’ Knowledge, Attitudes and Practices in Selected Districts of Kazakhstan

Veterinary Medicine and Science, Volume 12, Issue 5, September 2026.
A cross‐sectional study conducted in 12 districts across four regions of Kazakhstan assessed LSDV seropositivity in cattle and livestock owners’ knowledge, attitudes and practices. Serum samples from 338 cattle were tested by ELISA, and questionnaires were completed by 533 livestock owners. Animal‐level and herd‐level seroprevalence were 23.4% and 18.8%
Assylay Sarzhigitova, Lespek Kutumbetov, Kuandyk Zhugunissov, Raikhan Nissanova, Nazerke Kemalova, Aigul Kaliyeva, Sarsenbay Abdrakhmanov, Yerzhan Ospanov, Nadezhda Burambayeva, Arman Issimov, Gulmira Abulgazimova, Leila Kassymbekova   +11 more
wiley   +1 more source

Metagenomics Reveals Microbial Community Shifts Associated With Contrasting Anthropogenic Impacts in Freshwater Sources of A Coastal Protected Area in Southeastern Brazil

Water Environment Research, Volume 98, Issue 9, September 2026.
Metagenomics revealed distinct anthropogenic signatures in the microbiome of freshwater sources on Marambaia Island, supported by the Anthropogenic Impact Index (AII). Impacted sites showed lower microbial diversity, enrichment of fecal‐associated taxa, and 14 antimicrobial resistance genes, whereas conductivity, salinity, and turbidity explained 88.1%
Bruna Barbosa de Paula, Marize Pereira Miagostovich, Camille Ferreira Mannarino, André Vinicius Costa Ribeiro, Natália Maria Lanzarini, Carla Santos de Oliveira, Shênia Patrícia Corrêa Novo   +6 more
wiley   +1 more source

Toward an Improved Understanding of the Antarctic Coastal Zone and Its Contribution to Future Global Sea Level

Reviews of Geophysics, Volume 64, Issue 3, September 2026.
Abstract Understanding the coastal zone of the Antarctic Ice Sheet (AIS), where it interacts with the Southern Ocean and warmer air masses, is crucial for predicting Antarctica's influence on the global climate and sea level. This region has multiple tipping mechanisms that could trigger large, rapid, and potentially irreversible changes in the AIS ...
Kenichi Matsuoka, Geir Moholdt, Jennifer F. Arthur, Julien A. Bodart, Xiangbin Cui, Fausto Ferraccioli, René Forsberg, Vikram Goel, Tom A. Jordan, Felicity S. McCormack, Ruth Mottram, Hamish D. Pritchard, Calvin Shackleton, Kirsty J. Tinto, Fredrik Boberg, Marie G. P. Cavitte, Reinhard Drews, Pierre Dutrieux, Jörg Ebbing, Olaf Eisen, Hannes Eisermann, Alex S. Gardner, Chad A. Greene, Nicholas Holschuh, Stewart S. R. Jamieson, Byeong‐Hoon Kim, Naomi Krauzig, Bernd Kulessa, Carlton Leuschen, Jilu Li, Lu Li, Jonas Liebsch, Joseph A. MacGregor, Emma MacKie, Anirudha Mahagaonkar, Joséphine Maton, Mathieu Morlighem, Francisco Navarro, Peter D. Neff, Inès N. Otosaka, Frank Pattyn, Antonia Ruppel, Rebecca J. Sanderson, Hélène Seroussi, Andrew Shepherd, Matthew R. Siegfried, Thomas Slater, Arjen P. Stroeven, Michael Studinger, Thomas Teisberg, Ryan A. Venturelli, Jeremy P. Winberry, Chen Zhao, Lu An, Jonathan L. Bamber, Robin E. Bell, Robert G. Bingham, Johanna Brehmer‐Moltmann, Graeme Eagles, Jamin Greenbaum, Jorn Gronset, Won Sang Lee, Emmanuel Le Meur, Lenneke M. Jong, Katrin Lindbäck, Sven Lidström, Mareen Lösing, Masahiro Minowa, Mayuri Pandey, Yogesh Ray, Mirko Scheinert, Dustin M. Schroeder, Thorsten Seehaus, Kaian Shahateet, Daniel Steinhage, Xueyuan Tang, Drew Taylor, Hannah Verboncoeur, Junjun Yang, Duncan A. Young   +79 more
wiley   +1 more source