Article
Chemistry, Multidisciplinary
Vishnu Verman Rajasekaran, Emad Elramadi, Isa Valiyev, Prodip Howlader, Michael Schmittel
Summary: We demonstrate the locomotion capabilities of a biped on a tetrahedral track using chemical fuel, cooperative binding, and kinetic selectivity. The biped's movement is enabled by the binding of its dibenzyl amine feet to zinc porphyrin units and the subsequent protonation and binding to dibenzo 24-crown-8 sites, forming pseudorotaxane linkages.
CHEMICAL COMMUNICATIONS
(2023)
Article
Multidisciplinary Sciences
Anderson Antunes da Costa Moraes, Manuela Brito Duarte, Eduardo Veloso Ferreira, Gizele Cristina da Silva Almeida, Andre dos Santos Cabral, Anselmo de Athayde Costa e Silva, Daniela Rosa Garcez, Givago Silva Souza, Bianca Callegari
Summary: This study aims to validate the performance of an ultra-light sensor in measuring anticipatory postural adjustments (APAs) during step initiation, compared to a smartphone and a kinematic system. The results show that the temporal measurements obtained from the sensor and smartphone have high correlation with the kinematic system. However, caution should be exercised when using the ultra-light sensor for amplitude measurements, as further research is needed.
Article
Geochemistry & Geophysics
Chengyuan Zhang, Qunming Wang, Ping Lu, Yong Ge, Peter M. Atkinson
Summary: This article proposes a fast and slow changes constrained spatio-temporal subpixel mapping (FSSTSPM) method to enhance subpixel mapping (SPM) by utilizing temporal information from time-series images. The FSSTSPM method is validated using synthetic datasets and real datasets, and the results demonstrate its superiority, especially in the presence of proportion errors.
IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING
(2022)
Article
Biochemistry & Molecular Biology
Clara E. Green, Joseph Clarke, Roy Bicknell, Alice M. Turner
Summary: The expression of miR-181b-3p, miR-429, and miR-23c is increased in endothelial cells of COPD patients, with over-expression of miR-181b-3p associated with reduced sprouting. miR-429 is also overexpressed in lung cancer and exhibits a reduction in tubular formation.
Article
Mathematics, Interdisciplinary Applications
Xiujing Han, Jin Song, Yong Zou, Qinsheng Bi
Summary: This study reports the effects of a small perturbation of excitation frequency on fast-slow oscillations, revealing that a small perturbation of excitation frequency may complicate the vector field of the fast subsystem, leading to complex bifurcation behaviors and finally giving rise to complex fast-slow oscillations.
CHAOS SOLITONS & FRACTALS
(2022)
Review
Medicine, General & Internal
Yoshiaki Minakata, Yuichiro Azuma, Seigo Sasaki, Yusuke Murakami
Summary: Objective measurement methods using accelerometers are widely used for evaluating physical activity (PA) and sedentary behavior (SB) in patients with chronic obstructive pulmonary disease (COPD). However, there are several problems in objectively evaluating PA and SB, such as the variability of indicators depending on activity type and intensity, and the influence of environmental and methodological factors. Adjusting for these factors is important when evaluating PA or SB, especially in intervention studies.
JOURNAL OF CLINICAL MEDICINE
(2023)
Article
Chemistry, Analytical
Christian Leppin, Arne Langhoff, Hanna-Friederike Poggemann, Alexander Simon Goedde, Diethelm Johannsmann
Summary: Using fast EQCM technology, zwitterionic electrolytes were studied for changes in resonance frequency and bandwidth. Two processes were observed: a fast double layer recharging process, and a slower process related to molecule rearrangement after changing net charge, affecting viscosity and QCM response. Concentrated protein solutions showed different behavior due to viscoelasticity.
Article
Mathematics, Applied
Ludovic Righetti, Jonas Buchli, Auke Jan Ijspeert
Summary: This paper investigates the process of transforming oscillators into adaptive frequency oscillators through an adaptation mechanism and demonstrates the fast-slow dynamics involved. The study shows that the input signal forces the dynamics to jump between stable and unstable invariant slow manifolds, resulting in exponential convergence of frequency adaptation.
SIAM JOURNAL ON APPLIED DYNAMICAL SYSTEMS
(2021)
Article
Neuroimaging
Jingjing Yu, Wenjing Wang, Dechang Peng, Juan Luo, Huizhen Xin, Honghui Yu, Juan Zhang, Lan Li, Haijun Li
Summary: Abnormal local spontaneous brain activity has been observed in patients with chronic obstructive pulmonary disease (COPD) during the resting state. The study explored intrinsic neural activity changes in different frequency bands, demonstrating that COPD patients exhibited more widespread alterations in intrinsic brain activity in the slow-5 band than in the slow-4 band. Furthermore, the abnormal intrinsic brain activity in different frequency bands was associated with PaCO(2) in COPD patients.
BRAIN IMAGING AND BEHAVIOR
(2021)
Article
Neurosciences
Qianwen Li, Wenjia Zhu, Xinmei Wen, Zhenxiang Zang, Yuwei Da, Jie Lu
Summary: The study found that the local activity and network functional connectivity in the PSMA region can explain disease severity differently in fast and slow progression groups of ALS patients.
HUMAN BRAIN MAPPING
(2022)
Article
Mathematics, Interdisciplinary Applications
Xiujing Han, Qinsheng Bi
Summary: This paper reports sliding fast-slow dynamics related to classic relaxation oscillations in the slowly forced Duffing system with frequency switching. It demonstrates different sliding behaviors in fast-slow oscillations when the oscillation trajectory slides along the frequency-switching threshold for some time. The study reveals six different patterns of sliding fast-slow oscillations and their dynamical mechanisms.
CHAOS SOLITONS & FRACTALS
(2023)
Article
Biology
Daniel Powell, Sara A. Haddad, Srinivas Gorur-Shandilya, Eve Marder
Summary: Researchers have found that neuronal circuits in crabs can maintain coupling oscillations at different temperatures, demonstrating the adaptability of nervous systems to temperature changes. The integer coupling between the fast and slow rhythms within the stomatogastric ganglion of crabs can be conserved even when the temperature changes, indicating the robustness of neural circuits to temperature variations.
Article
Geosciences, Multidisciplinary
Hemant Khatri, Richard G. Williams, Tim Woollings, Doug M. Smith
Summary: Climate model hindcasts reveal the impacts of the North Atlantic Oscillation on the North Atlantic subpolar ocean, showing both fast and slow responses to a single winter NAO event. The fast response occurs over winter-spring seasons and is driven by changes in wind stress and heat flux anomalies, while the slow response persists for 3-4 years and is characterized by the redistribution of surface temperature anomalies.
GEOPHYSICAL RESEARCH LETTERS
(2022)
Article
Meteorology & Atmospheric Sciences
Herve Douville, A. John
Summary: Projected changes in global to regional precipitation are highly model-dependent, influenced by fast atmospheric adjustments and slower ocean-mediated responses to increasing greenhouse gas concentrations. The Cloud Feedback Model Intercomparison Project aims to understand the relative influence of these factors. Results show that uniform sea surface temperature warming dominates changes in precipitation intensity, while wet day frequency shapes geographical distribution and interannual variability. Further investigation and model comparisons within CFMIP are needed to better understand these complex dynamics.
Article
Cardiac & Cardiovascular Systems
Akio Yamamoto, Hiroyuki Nakamoto, Takumi Yamaguchi, Hideki Sakai, Masahiro Kaneko, Shingo Ohnishi, Teruaki Nishiuma, Kaku Sawada, Yusuke Iwata, Satoshi Osawa, Kumiko Ono, Akira Ishikawa
Summary: The novel respiratory monitor with wearable sensors achieved the target accuracy in both young adults and patients with COPD during the 6MWT. The total breathing frequencies were measured, and the monitor showed higher frequency in COPD patients compared to young adults. The agreement between the strain sensors and capnometer was within the acceptable range, indicating the reliability of the monitor.
RESPIRATORY MEDICINE
(2021)
