Results 121 to 130 of about 266,621 (357)

Ultrasonic characterization of the mechanical properties of polyester resin/ignimbrite stone powder composite mortars

open access: yesPolymer Composites, EarlyView.
Schematic diagram of the production and ultrasonic characterization of polyester resin/ignimbrite stone powder composite mortars. Abstract The elastic properties of Polyester Resin (PR)/Ignimbrite Stone Powder (ISP) composite mortars were determined by measuring ultrasonic wave velocities in the mortars. In the production of composite mortars, ISP with
Ahmet Cihat Ari, Imran Oral
wiley   +1 more source

Walkway Subgrade Stabilization Using Fly Ash [PDF]

open access: yes, 2013
The effectiveness of fly ash use in the stabilization of soil and the method that is used to test the strength of the subgrade soil with different amount of fly ash in order to stabilize the soil were studied.
A., Zulkiple, Leenaloshni, Joganathan
core  

Potential impacts of plant pests and diseases on trees and forests in the United Kingdom

open access: yesPLANTS, PEOPLE, PLANET, EarlyView.
The UK Plant Health Risk Register (PHRR) has so far identified 581 Plant Pests and Diseases (PPDs) that could invade the United Kingdom and affect 74 tree species. The combined effects of multiple invasions on trees are little understood and seldom considered.
Daniel P. Bebber   +3 more
wiley   +1 more source

Electrical charging of ash in Icelandic volcanic plumes [PDF]

open access: yesarXiv, 2014
The existence of volcanic lightning and alteration of the atmospheric potential gradient in the vicinity of near-vent volcanic plumes provides strong evidence for the charging of volcanic ash. More subtle electrical effects are also visible in balloon soundings of distal volcanic plumes.
arxiv  

UTILIZATION OF WASTE MATERIALS OF PRIDNEPROVSKA TPP [PDF]

open access: yes, 2018
Study the possibility of fly ashes full recycling of Pridneprovska Thermal Power Plant (PTPP) by their refining in industrially valuable products using gravity classification of dry ash from electrostatic precipitators and water-
PERKOV, Yevhen
core  

Enhanced Corrosion Testing and Analysis for Steel Rebars in Reinforced Concrete Bridge Decks Based on Effective Pre‐Cracking

open access: yesQuality and Reliability Engineering International, EarlyView.
ABSTRACT The degradation of concrete structures is a significant issue in the United States, with the corrosion of steel reinforcement being a primary contributor. Cracks in concrete intensify the corrosion process by allowing easier access for chloride ions from deicing salts, adversely affecting the lifespan of structures.
Zhanhang Li   +4 more
wiley   +1 more source

Interpretation of Past Kingdoms Poems to Reconstruct the Physical Phenomena in the Past: Case of Great Tambora Eruption 1815 [PDF]

open access: yesarXiv, 2016
In this paper I reconstruct the distribution of ash released from great Tambora eruption in 1815. The reconstruction was developed by analyzing the meaning of Poem of Bima Kingdom written in 1830. I also compared the effect of Tambora eruption and the Kelud eruption February 13, 2014 to estimate the most logical thickness of ash that has fallen in Bima
arxiv  

The influence of fly ash as substitute of cement in the durability of concrete [PDF]

open access: yes, 2008
Limitation of transport capacity through the concrete is one of the key points in the improvement of the material’s durability. The use of fly ash as an admixture to concrete is widely extended; a general consensus has been established due to the pore ...
Guerrero Bustos, Ana   +3 more
core   +1 more source

Evaluation of Human Impact on Sediment Dynamics in an Intensively Managed Agricultural Watershed Using Distributed Modeling

open access: yesRiver Research and Applications, EarlyView.
ABSTRACT By altering hydrological and geomorphological processes at watershed scales, humans have substantially influenced the movement of sediment on Earth's surface. Despite widespread recognition of human impacts on erosion and deposition, few studies have assessed the magnitude of change in watershed‐scale sediment fluxes before and after the ...
Mingjing Yu, Bruce L. Rhoads
wiley   +1 more source

Near real‐time monitoring of wading birds using uncrewed aircraft systems and computer vision

open access: yesRemote Sensing in Ecology and Conservation, EarlyView.
Developments in aerial survey methods and computer vision models allow for wildlife population monitoring over large areas. A key limitation to these approaches for active monitoring is the slow process of converting imagery into data. Near real‐time monitoring is crucial for management decisions and ecological forecasting.
Ethan P. White   +8 more
wiley   +1 more source

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