Results 21 to 30 of about 2,406,442 (245)

Embedded Ultrasonic Transducers for Active and Passive Concrete Monitoring

open access: yesSensors, 2015
Recently developed new transducers for ultrasonic transmission, which can be embedded right into concrete, are now used for non-destructive permanent monitoring of concrete. They can be installed during construction or thereafter.
Ernst Niederleithinger   +4 more
doaj   +1 more source

Influence of nanoparticle encapsulation and encoding on the surface chemistry of polymer carrier beads

open access: yesScientific Reports, 2023
Surface-functionalized polymer beads encoded with molecular luminophores and nanocrystalline emitters such as semiconductor nanocrystals, often referred to as quantum dots (QDs), or magnetic nanoparticles are broadly used in the life sciences as ...
Lena Scholtz   +8 more
doaj   +1 more source

Local Hydrogen Measurements in Multi-Phase Steel C60E by Means of Electrochemical Microcapillary Cell Technique

open access: yesMetals, 2023
By utilizing hydrogen as an eco-friendly energy source, many metals are exposed to gaseous (pressurized) hydrogen. High-strength steels with an ultimate tensile strength of 800 MPa and above are especially susceptible to hydrogen-induced fracturing, also
Jens Jürgensen, Michael Pohl
doaj   +1 more source

Fabrication and mechanical testing of a new sandwich structure with carbon fiber network core [PDF]

open access: yes, 2010
The aim is the fabrication and mechanical testing of sandwich structures including a new core material known as fiber network sandwich materials.
Amir Shahdin   +18 more
core   +2 more sources

Complexity of the behaviour of asphalt materials in cyclic testing [PDF]

open access: yes, 2017
This paper compares the results obtained in two types of cyclic tension-compression tests, a time sweep test, constant strain amplitude, and a strain sweep test, increasing strain amplitude every 5000 cycles, called EBADE (standing for the Spanish words ...
Botella Nieto, Ramón   +4 more
core   +2 more sources

Laboratory tools to quantify biogenic dissolution of rocks and minerals: a model rock biofilm growing in percolation columns

open access: yesFrontiers in Earth Science, 2016
Sub-aerial biofilms (SAB) are ubiquitous, self-sufficient microbial ecosystems found on mineral surfaces at all altitudes and latitudes. SABs, which are the principal causes of weathering on exposed terrestrial surfaces, are characterised by patchy ...
Franz eSeiffert   +6 more
doaj   +1 more source

Verbal analogy problem sets: An inventory of testing materials. [PDF]

open access: yes, 2020
Analogical reasoning is an active topic of investigation across education, artificial intelligence (AI), cognitive psychology, and related fields. In all fields of inquiry, explicit analogy problems provide useful tools for investigating the mechanisms ...
Holyoak, Keith J   +2 more
core  

Current situation of research on test methods for elastic modulus and Poisson’s ratio of single crystal superalloys

open access: yesJournal of Aeronautical Materials, 2019
In view of the anisotropic characteristics of elastic constants of single crystal superalloys and other materials, this paper summarizes two main existing testing methods for measuring elastic moduli and Poisson’s ratio of single crystal superalloys ...
ZHAO Pengtao, YU Huichen, HE Yuhuai
doaj   +1 more source

High-Purity Corundum as Support for Affinity Extractions from Complex Samples

open access: yesSeparations, 2022
Nonporous corundum powder, known as an abrasive material in the industry, was functionalized covalently with protein binders to isolate and enrich specific proteins from complex matrices.
Jule L. Völzke   +6 more
doaj   +1 more source

The unpredictably eruptive dynamics of spruce budworm populations in eastern Canada

open access: yesPopulation Ecology, EarlyView.
We examine historical population data for spruce budworm from several locations through the period 1930–1997, and use density‐dependent recruitment curves to test whether the pattern of population growth over time is more consistent with Royama's (1984; Ecological Monographs 54:429–462) linear R(t) model of harmonic oscillation at Green River New ...
Barry J. Cooke, Jacques Régnière
wiley   +1 more source

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