scholarly journals Zero or not? Causes and consequences of zero‐flow stream gage readings

2020 ◽  
Vol 7 (3) ◽  
Author(s):  
Margaret A. Zimmer ◽  
Kendra E. Kaiser ◽  
Joanna R. Blaszczak ◽  
Samuel C. Zipper ◽  
John C. Hammond ◽  
...  
Keyword(s):  
Flow Stream ◽  
Zero Flow

Ordered subset expectation maximization algorithm for image reconstruction applied to zero-flow or low-flow mimicking brain phantom

2005 ◽  
Vol 25 (1_suppl) ◽  
pp. S678-S678
Author(s):  
Yasuhiro Akazawa ◽  
Yasuhiro Katsura ◽  
Ryohei Matsuura ◽  
Piao Rishu ◽  
Ansar M D Ashik ◽  
...  
Keyword(s):  
Image Reconstruction ◽  
Expectation Maximization ◽  
Expectation Maximization Algorithm ◽  
Low Flow ◽  
Brain Phantom ◽  
Zero Flow

Überwachung einer Schwangerschaft bei frühem Zero-flow in der fetalen Aorta

2005 ◽  
Vol 209 (S 2) ◽  
Author(s):  
AS Gast ◽  
M Goeckenjan-Festag ◽  
P Baier ◽  
S Kolay ◽  
C Sohn
Keyword(s):  
Zero Flow

Unsteady Flow Phenomena in Rotating Centrifugal Impeller Passages

1970 ◽  
Vol 92 (1) ◽  
pp. 65-71 ◽  
Author(s):  
E. Lennemann ◽  
J. H. G. Howard
Keyword(s):  
Unsteady Flow ◽  
Secondary Flow ◽  
Centrifugal Impeller ◽  
Bubble Flow ◽  
Hydrogen Bubble ◽  
Visualization Technique ◽  
Rotating Systems ◽  
Flow Phenomena ◽  
Relative Flow ◽  
Zero Flow

The phenomena of unsteady relative flow observed in a centrifugal impeller passage running at part capacity and zero flow are discussed. The mechanisms of passage stall for a shrouded and unshrouded impeller are investigated and a qualitative correlation is developed for the influence of secondary flow and inducer flow on the passage stall. The hydrogen bubble flow visualization technique is extended to higher velocities and rotating systems and provides the method for obtaining the experimental results.

scholarly journals Hydrological, Environmental and Taxonomical Heterogeneity during the Transition from Drying to Flowing Conditions in a Mediterranean Intermittent River

Biology ◽  
2021 ◽  
Vol 10 (4) ◽  
pp. 316
Author(s):  
Andy Banegas-Medina ◽  
Isis-Yelena Montes ◽  
Ourania Tzoraki ◽  
Luc Brendonck ◽  
Tom Pinceel ◽  
...  
Keyword(s):  
Ecosystem Services ◽  
Base Flow ◽  
Ephemeral Streams ◽  
Biogeochemical Processes ◽  
Flow Conditions ◽  
Intermittent Rivers ◽  
Terrestrial Biodiversity ◽  
Turn Over ◽  
Zero Flow ◽  
Intermittent River

Intermittent rivers and ephemeral streams (IRES) are increasingly studied because of their often-unique aquatic and terrestrial biodiversity, biogeochemical processes and associated ecosystem services. This study is the first to examine the hydrological, physicochemical and taxonomic variability during the dry-wet transition of an intermittent river in the Chilean Mediterranean Zone. Based on 30-years of river monitoring data and the TREHS tool, the hydrology of the river was characterised. Overall, the river shows a significant reduction in streamflow (−0.031 m3/s per year) and a substantial increase of zero flow days (+3.5 days per year). During the transition of hydrological states, variations were observed in the environmental conditions and invertebrate communities. During the drying phase, abundance, richness, and diversity were highest, while species turn-over was highest during base flow conditions. The disconnected pools and the flow resumption phases were characterised by high proportions of lentic taxa and non-insects, such as the endemic species of bivalves, gastropods, and crustaceans, highlighting the relevance of disconnected pools as refuges. Future climatic change scenarios are expected to impact further the hydrology of IRES, which could result in the loss of biodiversity. Biomonitoring and conservation programmes should acknowledge these important ecosystems.

Energy and environmental enhancement of power generation units by means of zero‐flow coolant strategy

2021 ◽  
Author(s):  
Saman Samiezadeh ◽  
Ali Qasemian ◽  
Ali Sohani ◽  
Abolfazl Rezaei ◽  
Roozbeh Khodaverdian ◽  
...  
Keyword(s):  
Power Generation ◽  
Zero Flow

On the uncapacitatedK-commodity network design problem with zero flow-costs

2004 ◽  
Vol 51 (8) ◽  
pp. 1149-1172 ◽  
Author(s):  
Ada Suk-fung Ng ◽  
Trilochan Sastry ◽  
Janny M.Y. Leung ◽  
X.Q. Cai
Keyword(s):  
Network Design ◽  
Design Problem ◽  
Network Design Problem ◽  
Zero Flow

Coronary zero flow pressure and intramyocardial pressure in transiently arrested heart

1990 ◽  
Vol 24 (5) ◽  
pp. 358-363 ◽  
Author(s):  
S. Satoh ◽  
Y. Maruyama ◽  
J. Watanabe ◽  
M. Keitoku ◽  
K. Hangai ◽  
...  
Keyword(s):  
Intramyocardial Pressure ◽  
Flow Pressure ◽  
Zero Flow
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