Article
Multidisciplinary Sciences
Lia Siegelman, William R. Young, Andrew P. Ingersoll
Summary: Vortex crystals are structures formed by like-signed vortices in solid-body rotation, embedded in a background of weaker vorticity. It has been discovered that these crystals can form from the free evolution of randomly excited two-dimensional turbulence on an idealized polar cap, and they exhibit long-lasting stability.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2022)
Article
Environmental Sciences
Keshao Liu, Tandong Yao, David A. Pearce, Nianzhi Jiao, Yonghui Zeng, Bixi Guo, Yongqin Liu
Summary: The Tibetan Plateau, known as 'the Third Pole', has the highest number of high-altitude lakes in the world, sharing environmental features with polar regions. Despite similar environmental conditions, the spatial distribution of bacterial communities in the lakes showed distinct patterns, with evidence of dispersal limitation. Climatic variables and dispersal limitation were both important in controlling the spatial distribution of bacterial communities across regions.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Geosciences, Multidisciplinary
M. E. Landis, J. L. Whitten
Summary: Based on the analysis of geological units and surface features, we found multiple geological units and no evidence linked to the postulated subglacial lake locations. This contradicts the interpretation of the MARSIS basal radar reflector as subglacial lakes.
GEOPHYSICAL RESEARCH LETTERS
(2022)
Article
Microbiology
Jasmin L. Millar, Elizabeth A. Bagshaw, Arwyn Edwards, Ewa A. Poniecka, Anne D. Jungblut
Summary: Cryoconite holes, containing water and microbe-mineral aggregates, are hotspots of microbial diversity on glacial surfaces. They form in various conditions and locations, impacting their structure and community composition. The bacterial and microalgal communities in Arctic and Antarctic cryoconite holes show clear divisions, with regionally distinct microbial communities adapted to differing conditions within the cryosphere.
FRONTIERS IN MICROBIOLOGY
(2021)
Article
Geochemistry & Geophysics
Bram Vaes, Leandro C. Gallo, Douwe J. J. van Hinsbergen
Summary: Paleomagnetic poles used to compute apparent polar wander paths (APWPs) are strongly dispersed, with paleopoles derived from sedimentary rocks or datasets underrepresenting paleosecular variation (PSV) being more dispersed and frequently displaced. The number of sites used to calculate a paleopole is arbitrary, and smaller tectonic displacements require larger paleomagnetic datasets.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2022)
Article
Engineering, Aerospace
Hong Gan, Chengxuan Zhao, Guangfei Wei, Xiongyao Li, Guojun Xia, Xiao Zhang, Jingjing Shi
Summary: The lunar polar regions have continuous illumination and shadowed regions that can trap water and volatiles, making them important areas for future exploration. However, investigating these areas poses challenges due to complex terrain, dynamic lighting, and electric-field environment. China's Chang'E-7 mission aims to explore the Moon's south polar region in 2026 and one of its goals is to drill samples for in situ analysis. This study analyzes the engineering constraints of polar conditions and creates a 3D model of CE-7's lunar rover to study the charging effects under different environmental conditions. The results provide important implications for minimizing charging effects during lunar polar region exploration.
Article
Meteorology & Atmospheric Sciences
Yuta Hozumi, Takuo T. Tsuda, Keisuke Hosokawa, Yoshiaki Ando, Hidehiko Suzuki, Takeshi Murata, Takuji Nakamura
Summary: Using data from the Geostationary-Earth-Orbit satellite Himawari-8, the horizontal movement of polar mesospheric clouds (PMCs) was studied, revealing large oscillations and spectral peaks at periods of 12, 14.8, and 24 hours. The mean zonal velocity during the northern summer season of 2018 was approximately 8 m/s westward. This indicates that the horizontal movements of PMC observed by Himawari-8 are mainly driven by wind advection.
JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
(2021)
Article
Geochemistry & Geophysics
Radoslaw Zajdel, Krzysztof Sosnica, Grzegorz Bury, Rolf Dach, Lars Prange, Kamil Kazmierski
Summary: An empirical model of sub-daily polar motion (PM) based on multi-GNSS processing incorporating GPS, GLONASS, and Galileo observations has been derived, showing that the combined multi-GNSS solution delivers the best estimates and consistency with external geophysical and empirical models.
JOURNAL OF GEODESY
(2021)
Article
Multidisciplinary Sciences
Tamar Szoke, Nitsan Albocher, Sutharsan Govindarajan, Anat Nussbaum-Shochat, Orna Amster-Choder
Summary: TmaR, a previously unannotated protein in E. coli, localizes to the cell pole when phosphorylated on a tyrosine residue and controls the subcellular localization and activity of Enzyme I (EI) by binding and polar sequestration. The absence of TmaR leads to detrimental effects on cell survival in mild acidic conditions and affects the ability of cells to enter stationary phase, demonstrating the importance of TmaR in regulating cellular processes.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2021)
Article
Geosciences, Multidisciplinary
Bram Vaes, Douwe J. J. van Hinsbergen, Suzanna H. A. van de Lagemaat, Erik van der Wiel, Nalan Lom, Eldert L. Advokaat, Lydian M. Boschman, Leandro C. Gallo, Annika Greve, Carl Guilmette, Shihu Li, Peter C. Lippert, Leny Montheil, Abdul Qayyum, Cor G. Langereis
Summary: Apparent polar wander paths (APWPs) calculated from paleomagnetic data provide a quantitative paleogeographic framework for studying the evolution of Earth's interior, surface, and atmosphere. This study introduces a new method to calculate the global APWP using site-level paleomagnetic data, which incorporates spatial and temporal uncertainties. The new global APWP shows smaller uncertainties and follows the same trend as previous pole-based APWPs. Data density allows for higher-resolution APWPs in certain time intervals, but not for the entire 320-0 Ma time span. This method has the potential to significantly improve the quality and resolution of the global APWP.
EARTH-SCIENCE REVIEWS
(2023)
Article
Computer Science, Artificial Intelligence
Fengli Yang, Yue Zhao, Xuechun Wang
Summary: This study investigates the pole-polar properties of central catadioptric sphere or line images and proposes a camera calibration algorithm based on the generalized eigenvalue decomposition. The algorithm can effectively recover the pole and polar of the image of absolute conic and the modified image of absolute conic. Furthermore, it is also applicable to paracatadioptric sensors.
INTERNATIONAL JOURNAL OF COMPUTER VISION
(2023)
Article
Business, Finance
Imed Chkir, Hatem Rjiba, Fatma Mrad, Afef Khalil
Summary: This study investigates the relationship between social trust and corporate social responsibility, and finds that social trust is a crucial factor in explaining cross-country variations in CSR activities. The findings are robust to controlling for other factors.
FINANCE RESEARCH LETTERS
(2023)
Article
Astronomy & Astrophysics
P. M. Streeter, S. R. Lewis, M. R. Patel, J. A. Holmes, K. Rajendran
Summary: The northern polar vortex on Mars shows a high degree of interannual repeatability in its structure and evolution, except during large dust storms. The seasonal timing of these storms seems to be the key factor determining their impacts on the polar vortex.
Review
Neurosciences
Koji Ishikuro, Noriaki Hattori, Hironori Otomune, Kohta Furuya, Takeshi Nakada, Kenichiro Miyahara, Takashi Shibata, Kyo Noguchi, Satoshi Kuroda, Yuji Nakatsuji, Hisao Nishijo
Summary: Transcranial direct current stimulation is a noninvasive technique that modulates neuronal excitability by applying a weak current to the scalp. It has potential uses in neuro-rehabilitation, improving motor functions and other outcomes.
Article
Business, Finance
Chin-Wen Hsin, Shu-Cing Peng
Summary: This study shows that firms with higher social capital and trust, as indicated by their environmental and social performance, have better stock price efficiency. The findings remain robust even when alternative approaches to address the endogeneity concerns are used in a sample of 45 countries. This relationship is mainly driven by a firm's engagement with third parties and society as a whole, which help regulate the firm's information environment after considering other influences. Furthermore, the positive impact of environmental and social performance is further influenced by the firm's associated macro-level trust and social capital, as represented by cultural and institutional factors in the market.
INTERNATIONAL REVIEW OF FINANCIAL ANALYSIS
(2023)
