Results 51 to 60 of about 680,096 (228)

Prediction of the mechanical properties of granites by ultrasonic pulse velocity and Schmidt hammer hardness [PDF]

, 2007
The present work deals with the use of simple and economical non destructive techniques, ultrasonic pulse velocity and Schmidt hammer to predict the strength and elastic properties of granitic stones that are characteristic in ancient masonry ...
Vasconcelos, Graça, Lourenço, Paulo B., Pamplona, J., Alves, C. A. Simões   +3 more
core   +2 more sources

Paid‐free differentiation in freemium: Understanding the balance between discovery and cannibalization and its implications for paid product sales

Strategic Entrepreneurship Journal, EarlyView.
Abstract Research Summary Entrepreneurs in digital markets often introduce free versions of their paid products to boost their visibility. This freemium strategy involves a trade‐off between discovery and cannibalization. We study how feature‐based differentiation between the paid product and its free version shapes this trade‐off and its consequences ...
Joey van Angeren, Ksenia Podoynitsyna, Fred Langerak   +2 more
wiley   +1 more source

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

steel 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, Jannik Zuraszek, Ulrich Krupp, Rolf Schmidt, Hardy Mohrbacher, Alexander Gramlich   +5 more
wiley   +1 more source

Schmidt-Hammer Dating of Five Rock Slope Failures in the Westfjords of Iceland

, 2023
International audienceRock slopes failures (RSF) are numerous in Iceland, especially in the eastern, northern and northwestern regions, which correspond to Tertiary basaltic formations.
Portier, Émilie, Mercier, Denis, Decaulne, Armelle   +2 more
core   +2 more sources

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

The 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

Polytechnic 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 Abdulrahman Mohammed, Younis M. Alshkane   +1 more
doaj   +1 more source

Experimental analysis on partial replacement of cement with brick powder in concrete

Case Studies in Construction Materials, 2021
The aim of this research is to interrogate the feasibility of using Waste brick powder (WBP) successfully in concrete as a substitute of cement. The replacement levels were kept at 5% and 10%, compared to the reference concrete.
Rehan Arif, Anwar Khitab, Mehmet Serkan Kırgız, Raja Bilal Nasar Khan, Seemab Tayyab, Riaz Akhtar Khan, Waqas Anwar, Muhammad Tausif Arshad   +7 more
doaj   +1 more source

Vision language models for bridge inspections: A review of applications in image‐based damage documentation

Structural Concrete, EarlyView.
Abstract Automating bridge inspections requires more than detecting individual damage instances. It demands systems capable of describing, contextualizing, and interpreting damage in an inspection‐relevant manner. Conventional computer vision approaches, such as object detection and segmentation, primarily address visual recognition tasks and are ...
Rona Firdes Çelik, Ulas Bagci, Sylvia Kessler   +2 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)

Heritage
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, María Marta Sampietro-Vattuone, Elena Maestro-Zaldívar, Almudena Domínguez-Arranz   +3 more
doaj   +1 more source

Analysis of Impact Hammer Rebound to Estimate Rock Drillability

, 2000
In this paper, the piston rebound common to both the Schmidt Impact Hammer and downhole hammer drills has been analyzed and calculated by means of stress wave theory and the energy conservation law.
Santi, P., Li, X., Rupert, Gerald B., Summers, David A., Liu, D.   +4 more
core   +1 more source