Results 1 to 10 of about 152,318 (298)

The Complexity of Folding Self-Folding Origami

open access: yesPhysical Review X, 2017
Why is it difficult to refold a previously folded sheet of paper? We show that even crease patterns with only one designed folding motion inevitably contain an exponential number of “distractor” folding branches accessible from a bifurcation at the flat ...
Menachem Stern   +2 more
doaj   +3 more sources

Hybrid Poly(hydroxy urethane)s: Folded-Sheet Morphology and Thermoreversible Adhesion [PDF]

open access: yesACS Omega, 2019
Anitha Sukumaran Nair   +4 more
doaj   +2 more sources

Shear retrofitting with manually made NSM FRP sheets (MMFRP) of RC beams

open access: yesJournal of Engineering and Applied Science, 2022
This paper presents an experimental study to evaluate the effectiveness of the proposed carbon manually made fibre-reinforced polymer (MMFRP) folded sheet for shear strengthening of nine RC beams using near-surface mounted (NSM) method, in addition to an
Mohamed G. Abdelmohaymen, Hamed M. Salem
doaj   +1 more source

Study of a terahertz folded waveguide oscillator with sheet electron beam

open access: yesAIP Advances, 2021
High power vacuum electronic devices of the millimeter wave to terahertz regime are attracting extensive interest due to their potential applications in science and technologies.
Fengying Lu   +4 more
doaj   +1 more source

Epithelial sheet folding induces lumen formation by Madin-Darby canine kidney cells in a collagen gel. [PDF]

open access: yesPLoS ONE, 2014
Lumen formation is important for morphogenesis; however, an unanswered question is whether it involves the collective migration of epithelial cells. Here, using a collagen gel overlay culture method, we show that Madin-Darby canine kidney cells migrated ...
Sumire Ishida   +6 more
doaj   +1 more source

The Effects of Charged Amino Acid Side-Chain Length on Diagonal Cross-Strand Interactions between Carboxylate- and Ammonium-Containing Residues in a β-Hairpin

open access: yesMolecules, 2022
The β-sheet is one of the common protein secondary structures, and the aberrant aggregation of β-sheets is implicated in various neurodegenerative diseases. Cross-strand interactions are an important determinant of β-sheet stability.
Jing-Yuan Chang   +8 more
doaj   +1 more source

Many dissimilar NusG protein domains switch between α-helix and β-sheet folds

open access: yesNature Communications, 2022
Folded proteins are composed of secondary structures, α-helices and β-sheets, that are generally assumed to be stable. Here, the authors combine computational prediction with experimental validation to show that many sequence-diverse NusG protein domains
Lauren L. Porter   +7 more
doaj   +1 more source

EXTRACTION OF ICE SHEET LAYERS FROM TWO INTERSECTED RADAR ECHOGRAMS NEAR NEEM ICE CORE IN GREENLAND [PDF]

open access: yesThe International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2016
Accumulation of snow and ice over time result in ice sheet layers. These can be remotely sensed where there is a contrast in electromagnetic properties, which reflect variations of the ice density, acidity and fabric orientation. Internal ice layers are
S. Xiong, J.-P. Muller
doaj   +1 more source

Parametric Creative Design of Building Free-forms Roofed with Transformed Shells Introducing Architect’s and Civil Engineer’s Responsible Artistic Concepts

open access: yesBuildings, 2019
The article concerns a parametric description of unconventional building forms roofed with folded sheeting transformed elastically into shells. The description supports the designer in the search for attractive forms and a rational use of materials.
Jacek Abramczyk, Aleksandra Prokopska
doaj   +1 more source

Research on Mechanical Properties of V-Type Folded Core Sandwich Structures

open access: yesAerospace, 2022
A folded core is a three-dimensional configuration formed by folding a flat sheet of paper. Similar to foam and honeycomb, folded cores are widely used in aerospace as the cores for sandwich structures due to their excellent mechanical properties and ...
Zehao Cui, Zhijin Wang, Feng Cao
doaj   +1 more source

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