Results 121 to 130 of about 17,173 (240)

Design, fabrication, testing, and delivery of a solar energy collector system for residential heating and cooling [PDF]

open access: yes
A low cost flat plate solar energy collector was designed for the heating and cooling of residential buildings. The system meets specified performance requirements, at the desired system operating levels, for a useful life of 15 to 20 years, at minimum ...
Borzoni, J. T., Holland, T. H.
core   +1 more source

Mesoporous Carbon Thin Films with Large Mesopores as Model Material for Electrochemical Applications

open access: yesAdvanced Functional Materials, Volume 36, Issue 18, 2 March 2026.
Mesoporous carbon thin films possessing 70 nm mesopores are prepared on titanium substrates by soft templating of resol resins with a self‐synthesized poly(ethylene oxide)‐block‐poly(hexyl acrylate) block copolymer. A strategy to avoid corrosion of the metal substrate is presented, and the films are extensively characterized in terms of morphology ...
Lysander Q. Wagner   +9 more
wiley   +1 more source

Bending Behaviour and Failure Modes of Non-Glue-Laminated Timber Beams Composed of Wooden Dowels and Self-Tapping Screws

open access: yesBuildings
The purpose of this research is to compare the bending behaviour of non-glue-laminated timber beams and glulams by full-scale four-point bending tests.
Yu-Hsiang Yeh, Yi-Chi Yeh
doaj   +1 more source

Self-tapping screws as reinforcement for timber structures

open access: yes, 2009
Modern self-tapping and continuously-threaded woodscrews enable new methods for strengthening and joining timber and glulam construction elements. As these screws have a high axial strength and an excellent continuous bond to the wood they can be used similar to steel reinforcement in concrete construction.
TRAUTZ, Martin, KOJ, Christoph
openaire   +2 more sources

Hand tools: A complization [PDF]

open access: yes
Technical information is provided for recent developments in hand tools for assembly and disassembly application, for materials finishing, and for inspection, analysis, and testing.

core   +1 more source

Helical coaxial resonator RF filter [PDF]

open access: yes, 1969
Helical coaxial resonator RF ...
Maxwell, M. W.
core   +1 more source

Self‐Assembled Fluorescent Nanodiamond Layers for Quantum Imaging

open access: yesAdvanced Materials Interfaces, Volume 13, Issue 5, 4 March 2026.
We developed a simple, scalable method for coating surfaces with fluorescent nanodiamonds. By optimizing the coating process, we created uniform, dense layers that enable high‐resolution magnetic imaging using the nitrogen‐vacancy (NV) center in nanodiamonds. This approach enables the development of cost‐effective quantum‐sensing and imaging substrates
Katherine Chea   +8 more
wiley   +1 more source

Influence of screw angle and position on the extraction dynamics of Cross-Laminated Timber: an empirical analysis and comparative modeling study

open access: yesJournal of Asian Architecture and Building Engineering
The design of dowel-type fastener connections is crucial for the structural integrity of Cross-Laminated Timber (CLT) systems, with individual fastener anchorage capacity as a key factor. This study investigates the withdrawal performance of Self-Tapping
Jia Lei   +7 more
doaj   +1 more source

BOLTED TIMBER JOINTS WITH SELF-TAPPING SCREWS

open access: yesRevista EIA, 2007
The use of self-tapping screws with continuous threads in the joint area as a reinforcement to avoid splitting of timber members is studied. A theoretical model is developed to calculate the stress distribution around a pin-loaded hole in a timber joint, to predict brittle failure modes in bolted connections and to calculate the load in the reinforcing
openaire   +2 more sources

Reversible Metamorphosis of a Conjugated Polymer Induced by Photoexcitation

open access: yesAdvanced Photonics Research, Volume 7, Issue 3, March 2026.
Photon absorption in conjugated polymers induces a persistent, reversible transformation in their optoelectronic and structural properties. At elevated temperatures, photoexcitation alters the molecular conformations and (re)organization of polymer molecules within low‐viscosity matrices, resulting in a persistent “photomemory” effect with blue‐shifted
Solomon L. Joseph   +2 more
wiley   +1 more source

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