Results 81 to 90 of about 71,442 (339)

Overspeed correction scheme for dc motor using artifical intelligent approach [PDF]

open access: yes, 2013
The conventional PI, PD and PID controllers were used as a control strategy for various industrial processes from many years due to their simplicity in operation.
Bollah, Javadius
core  

A Tool for Prioritizing Gravel Augmentation Reaches for Sediment Starved Rivers

open access: yesRiver Research and Applications, EarlyView.
ABSTRACT Gravel augmentation is a widely used restoration technique used to improve habitat below dams, including salmonids spawning habitat. However, gravel augmentation can be cost‐prohibitive, and it is often unclear which stream segments have the highest potential to benefit spawning salmonids.
Patricia J. Wohner   +2 more
wiley   +1 more source

Actualization of prospects of thermal usage of groundwater of mines during liquidation [PDF]

open access: yesE3S Web of Conferences, 2019
The aim of the paper is justification of the economically efficient technological scheme for development of a thermal resource of “Stashkov” mine after its closure, ensuring the maintenance of a favorable energy and ecological-hydrogeological regime in ...
Sadovenko Ivan   +3 more
doaj   +1 more source

Eighth Grade Students' Understandings of Groundwater [PDF]

open access: yes, 2004
According to national standards, eighth graders should possess appropriate understandings regarding groundwater and its role in the hydrologic cycle. This article describes a study of eighth-grade students to determine what types of ideas eighth graders ...
Daniel Dickerson, Karen Dawkins
core   +1 more source

Development and Assessment of Fluorescent‐Dyed, Preserved Invasive Grass Carp (Ctenopharyngodon idella) Eggs as Surrogates for Live Eggs in Transport and Dispersal Control Experiments

open access: yesRiver Research and Applications, EarlyView.
ABSTRACT Invasive species such as grass carp (Ctenopharyngodon idella) pose substantial ecological threats to North American freshwater ecosystems. Understanding their early life stage behavior is critical for management efforts. From spawning to hatching, invasive carp eggs must remain suspended in the water column while drifting downstream for the ...
Henry F. Doyle   +8 more
wiley   +1 more source

Inter‐Annual Variation in Alpha and Beta Diversity of Benthic Macroinvertebrate Communities in Agricultural Ditches

open access: yesRiver Research and Applications, EarlyView.
ABSTRACT Ditches are essential elements of the agricultural landscape because of their role as habitat or refuge for aquatic species, especially in homogenized and intensively cultivated areas. However, data on the biodiversity associated with agricultural ditches, and its variation over time, are underrepresented in ecological research.
Michela Rappocciolo   +5 more
wiley   +1 more source

AR, CR and ARCR modeling for simulations and analyses of karst groundwater quality parameters [PDF]

open access: yesGeološki Anali Balkanskoga Poluostrva, 2018
Although an invisible component of the hydrologic cycle, groundwater generally takes precedence over other water resources in the area of drinking water supply.
Ristić-Vakanjac Vesna   +4 more
doaj   +1 more source

Evaporite-karst processes, landforms, and environmental problems [PDF]

open access: yes, 2008
Evaporite karst is widespread, but relatively unknown when compared with carbonate karst; this special issue addresses that lack of familiarity. Evaporite rocks have much higher solubilities and faster dissolution rates than carbonate rocks and they also
Cooper, Anthony   +2 more
core   +1 more source

Using Fine Sediment Monitoring to Quantify Sand Loading Over Time

open access: yesRiver Research and Applications, EarlyView.
ABSTRACT Riverine sand loading can lead to geomorphic change, impacting river processes like lateral migration and vertical aggradation or degradation. Yet many sediment monitoring programs track only fine sediment measurable as total suspended solids (TSS). Here, we assess the ability for TSS data to be used to determine sand loading.
Andrew P. Kasun, Karen B. Gran
wiley   +1 more source

The global hydrology education resource [PDF]

open access: yes, 2011
This article is a selective overview of a range of contemporary teaching resources currently available globally for university hydrology educators, with an emphasis on web-based resources.
Bardsley, W. Earl   +1 more
core   +1 more source

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