Results 51 to 60 of about 6,338 (225)

Multiproxy Chronologies of the Hurd Rock Glacier (Livingston Island, South Shetland Islands, Maritime Antarctica): Between the Late‐Stage Stabilization and Flow Deceleration

open access: yesPermafrost and Periglacial Processes, EarlyView.
ABSTRACT The Hurd Rock Glacier, located on Livingston Island (South Shetland Islands archipelago, Maritime Antarctica), is a tongue‐shaped feature composed of angular boulders, displaying transverse ridges and furrows, and featuring lobate structures, which are more prominently developed in its frontal sector.
Rosana Menéndez‐Duarte   +5 more
wiley   +1 more source

HIGH SELECTIVE OIL SHALE MINING; pp. 305–325 [PDF]

open access: yesOil Shale, 2013
Several extraction technologies have been used for mining oil shale in Estonia. The quality and properties of the raw material for fuel and oil depend directly on the initial geological properties of the mineral resource.
VIVIKA VÄIZENE   +5 more
doaj   +1 more source

A correlation between Schmidt hammer rebound numbers with impact strength index, slake durability index and P-wave velocity

open access: yes, 2011
The main objective of this study was to establish statistical relationship between Schmidt hammer rebound numbers with impact strength index (ISI), slake durability index (SDI) and P-wave velocity.
Sharma, Pramod   +5 more
core   +1 more source

Education for Problems of Sustainable Development

open access: yesSustainable Development, EarlyView.
ABSTRACT The Cynefin framework for decision‐making categorizes problem environments into simple (known knowns), complicated (known unknowns), complex (unknown unknowns), and chaotic (unknowables). Simple and complicated problem environments enable best and good solutions, but complex and chaotic problem environments require emergent and novel solutions.
Abbas Ziafati Bafarasat
wiley   +1 more source

Establishing a refined deglacial chronology for the Cairngorms mountains using Schmidt Hammer exposure-age dating [PDF]

open access: yes, 2019
Recent work by Tomkins et al. (2018a) provides a revised Schmidt Hammer age-calibration curve for the British Isles based on 54 granite surfaces. Schmidt Hammer Exposure Dating (SHED) presents an opportunity to elucidate the dynamics of former glaciers ...
Tonkin, Toby Nicholas; id_orcid
core   +2 more sources

Determine the Compressive Strength of Calcium Silicate Bricks by Combined Nondestructive Method

open access: yesThe Scientific World Journal, 2014
The paper deals with the application of combined nondestructive method for assessment of compressive strength of calcium silicate bricks. In this case, it is a combination of the rebound hammer method and ultrasonic pulse method.
Jiri Brozovsky
doaj   +1 more source

Tensile Strength Modeling of Limestone Rocks in Sulaymaniyah City, Iraq Using Simple Tests

open access: yesPolytechnic Journal, 2019
Tensile strength of rocks is one of the mechanical properties of intact rock that is a significant parameter for designing geotechnical structures includes dam foundations and tunnels.
Diyari Abdalrahman Mohammed   +1 more
doaj   +1 more source

Phase Transformation Behavior of Continuously Cooled Fe–C–V–(Mo) Alloys

open access: yessteel research international, EarlyView.
Additions of vanadium and molybdenum microalloying are shown to reshape phase transformations in clean low‐carbon steels. By tracking microstructural shifts during continuous cooling, the work uncovers the correlation between transformation kinetics, ferrite morphology, and hardness.
Anastasiya Tselikova   +5 more
wiley   +1 more source

Geological and Geomorphological Context and Characterization of Constructive Materials from the Iberian–Roman Archaeological Site at La Vispesa (NE Spain)

open access: yesHeritage
La Vispesa is an archaeological settlement occupied from the First Iron Age to the Imperial Roman Period. The objectives of this study were to (i) perform a geomorphological characterization of the site; (ii) place it in its regional context; (iii ...
José Luis Peña-Monné   +3 more
doaj   +1 more source

176— Comparison of Using a Schmidt Hammer to Evaluate Strength of Rock to Conventional Methods

open access: yes, 2020
A Schmidt hammer is a device designed to test the strength of concrete. More recently, the hammer has been used as a preliminary measure of rock strength.
Feldman, Austin, Savoie, Joseph
core   +1 more source

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