Results 61 to 70 of about 117,447 (292)

Cyclic surfaces accompanying non-ruled quadrics of rotation

Омский научный вестник, 2023
The paper considers the shaping of cyclic surfaces based on nonlinear rotation, in which the axis of rotation and the generatrix in the general case are three-dimensional smooth curves. As a tool for shaping surfaces of non-linear rotation, the method of
K. L. Panchuk, T. M. Myasoedova, E. V. Lyubchinov   +2 more
doaj   +1 more source

Calpain small subunit homodimerization is robust and calcium‐independent

FEBS Letters, EarlyView.
Calpains dimerize via penta‐EF‐hand (PEF) domains. Using single‐molecule force spectroscopy, we measured the strength and kinetics of PEF–PEF homodimer binding. The interaction is robust, shows a transient conformational step before dissociation, and remains largely insensitive to Ca2+.
Nesha May O. Andoy, Trina Dykstra‐MacPherson, Mathias A. Bell, Peter L. Davies, Ruby May A. Sullan   +4 more
wiley   +1 more source

Elastic Geometric Shape Matching

, 2021
In computational geometry, geometric shape matching (GSM) problems are among the classical and well-studied geometric optimization problems. In a conventional GSM problem, the pattern P and the model Q, both from a class S of geometric shapes, are given, along with a suitable distance measure d.
openaire   +3 more sources

Structural insights into an engineered feruloyl esterase with improved MHET degrading properties

FEBS Letters, EarlyView.
A feruloyl esterase was engineered to mimic key features of MHETase, enhancing the degradation of PET oligomers. Structural and computational analysis reveal how a point mutation stabilizes the active site and reshapes the binding cleft, expading substrate scope.
Panagiota Karampa, Konstantinos Makryniotis, Theofani‐Iosifina Sousani, Evangelos Topakas, Vangelis Daskalakis, Maria Dimarogona   +5 more
wiley   +1 more source

Metric and topo-geometric properties of urban street networks: some convergences, divergences and new results [PDF]

, 2009
The theory of cities, which has grown out of the use of space syntax techniques in urban studies, proposes a curious mathematical duality: that urban space is locally metric but globally topo-geometric.
Hillier, B., Park, H.-T., Turner, A., Yang, T.   +3 more
core  

Shaping bursting by electrical coupling and noise

, 2011
Gap-junctional coupling is an important way of communication between neurons and other excitable cells. Strong electrical coupling synchronizes activity across cell ensembles.
A Ghosh, A Longtin, A Lubotzky, A Sherman, A Sherman, AA Grace, B Bollobas, B Pfeuty, BW Connors, CB Muratov, CC Chow, D Klein, D Terman, DS Goldobin, E Lee, E Manica, EF Mishchenko, EM Izhikevich, G De Vries, Gao Juan, GD Smith, Georgi S. Medvedev, GS Medvedev, GS Medvedev, GS Medvedev, GS Medvedev, GS Medvedev, GS Medvedev, I Karatzas, J Rinzel, J Rubin, J Su, J White, JJ Collins, M Fiedler, M Usher, MG Pedersen, MI Freidlin, MI Freidlin, MV Day, N Kopell, P Hitczenko, P Sarnak, R Kuske, REL DeVille, RJ Butera, RZ Has’minskii, S Coombes, S Hoory, S Lim, S-N Chow, Svitlana Zhuravytska, T Lewis, TR Chay, TR Chay, W Xiao, XJ Wang, ZF Mainen   +57 more
core   +1 more source

VLT observations of the asymmetric Etched Hourglass Nebula, MyCn 18 [PDF]

, 2014
Context. The mechanisms that form extreme bipolar planetary nebulae remain unclear. Aims. The physical properties, structure, and dynamics of the bipolar planetary nebula, MyCn 18, are investigated in detail with the aim of understanding the shaping ...
Clyne, N., Lloyd, M., Matsuura, M., Meaburn, J., Redman, M. P., Singh, N.   +5 more
core   +2 more sources

A methionine‐lined active site governs carbocation stabilization and product specificity in a bacterial terpene synthase

FEBS Letters, EarlyView.
This study reveals a unique active site enriched in methionine residues and demonstrates that these residues play a critical role by stabilizing carbocation intermediates through novel sulfur–cation interactions. Structure‐guided mutagenesis further revealed variants with significantly altered product profiles, enhancing pseudopterosin formation. These
Marion Ringel, Carl P. O. Helmer, Shani Zev, Ronja Driller, Emily Buhr, Markus Reinbold, Renana Schwartz, Gabriel Foley, Mikael Boden, Daniel Garbe, Gerhard Schenk, Dan Thomas Major, Bernhard Loll, Thomas Brück   +13 more
wiley   +1 more source

Reflection of the Role of Geometry in Design of the Aghabozorg School-Mosque in Kashan [PDF]

Mathematics Interdisciplinary Research, 2019
‎Aghabozorg Mosque with massive brick dome and the tiled minaret is one of the most magnificent Islamic buildings in Kashan in the Qajar period‎. ‎The unique features of the architecture suggest the architects of this building‎, ‎in terms of the nature ...
Hamidreza Farshchi, Maliheh Ansari, Vahid Askari Kashan   +2 more
doaj   +1 more source

Development of technological equipment for autonomous testing of the shaping structure of the umbrella reflector

Космические аппараты и технологии, 2022
A shaping structure is element in most transformable reflectors to ensure the required accuracy of the reflective surface. An umbrella reflector shaping structure is a system of tensioned dimensionally stable cords in the open position.
A. V. Ivanov, K. A. Kushnir, V. O. Shevchugov, A. N. Klimov   +3 more
doaj   +1 more source