نتایج جستجو برای: tidal seal level variation

تعداد نتایج: 1373202  

Journal: :Remote Sensing 2023

Tidal flats provide ecosystem services to billions of people worldwide; however, their changing status is largely unknown. Several challenges in the fine extraction tidal using remote sensing techniques, including tide-level and water-edge line changes, exist at present, especially regarding spatial temporal distribution mangroves. This study proposed a method combination threshold segmentation...

Journal: :Estuaries and Coasts 2022

Abstract Small low-inflow intermittently closed estuaries are common in Mediterranean climates worldwide; however, despite their important contributions to ecosystem services and coastal resilience, dynamics have been less well studied relative classical (i.e., deeper, persistent freshwater inflow) estuaries. It is known that infragravity wave propagation into these can induce strong currents c...

2013
Fatima Wurie Olivier Le Polain de Waroux Matthew Brande Wesley DeHaan Katherine Holdgate Rishi Mannan Donald Milton Daniel Swerdlow Andrew Hayward Adam Hill Jonathan Nguyen-Van-Tam

The size and concentration of exhaled particles may influence respiratory infection transmission risk. We assessed variation in exhaled particle production between individuals, factors associated with high production and stability over time. We measured exhaled particle production during tidal breathing in a sample of 79 healthy volunteers, using optical particle counter technology. Repeat meas...

Journal: :Bio Systems 2000
S Abades C A Richardson R Otaíza

Patterns of tidal microgrowth bands present in acetate peels of shell sections of the Chilean mussel Semimytilus algosus from three tidal levels on a wave-exposed shore were analyzed for the presence of recurring periodicities using numerical tools derived from signal nonlinear analysis. Both chaotic and coherent structure were found within the microgrowth pattern record, with mussels from the ...

2011
Urs Baumann

In many cases it is necessary to judge the stability behavior of a specific compressor. This might be the OEM checking the feasibility of a proposed compressor layout or it might be the user judging one of his machines which causes troubles in operation. API 617 suggests a stability level I or level II analysis. The shortcoming of the level I analysis is that it considers only the global cross-...

ژورنال: فیزیک زمین و فضا 2020

Extracting the main cyclic fluctuations from sea level changes of the Persian Gulf and Oman Sea is vital for understanding the behavior of tides and isolating non-tidal impacts such as those related to climate and changes in the ocean-sea circulations. This study compares two spectral analysis methods including: Least Squares Spectral Analysis (LSSA) and Least Squares Harmonic Estimation (LSHE)...

2016
M. Cronin H. Gerritsen D. Reid M. Jessopp

Seals and humans often target the same food resource, leading to competition. This is of mounting concern with fish stocks in global decline. Grey seals were tracked from southeast Ireland, an area of mixed demersal and pelagic fisheries, and overlap with fisheries on the Celtic Shelf and Irish Sea was assessed. Overall, there was low overlap between the tagged seals and fisheries. However, whe...

Journal: :Biometrics 2009
Ken B Newman Carmen Fernández Len Thomas Stephen T Buckland

SUMMARY We compare two Monte Carlo (MC) procedures, sequential importance sampling (SIS) and Markov chain Monte Carlo (MCMC), for making Bayesian inferences about the unknown states and parameters of state-space models for animal populations. The procedures were applied to both simulated and real pup count data for the British grey seal metapopulation, as well as to simulated data for a Chinook...

Journal: :Anais da Academia Brasileira de Ciencias 2013
Tatiana F Maria Paulo Paiva Ann Vanreusel André M Esteves

We investigated if the differences in density and nematode communities of intertidal sediments from two Brazilian sheltered sandy beaches were related to environmental characteristics. The upper tide level (UTL) and the low tide level (LTL) of both beaches were surveyed in January (austral summer) and June 2001 (austral winter) during low-spring tides, by collecting samples of nematodes and sed...

2003
Tomoatsu Takahashi

At a time of drastic change in the environment surrounding financial institutions, administrative work centralization aimed at reducing the workload of the back office has propelled the introduction of cost-effective image processing systems geared toward centralized operations. Further, in an effort to prevent forgery, more and more institutions have done away with duplicate seals and are intr...

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