Results 141 to 150 of about 7,242 (307)

Shape and Symmetry Determine Two-Dimensional Melting Transitions of Hard Regular Polygons [PDF]

, 2017
Joshua A. Anderson, James Antonaglia, Jaime A. Millan, Michael Engel, Sharon C. Glotzer   +4 more
openalex   +1 more source

Semiclassical inequalities for Dirichlet and Neumann Laplacians on convex domains

Communications on Pure and Applied Mathematics, EarlyView.
Abstract We are interested in inequalities that bound the Riesz means of the eigenvalues of the Dirichlet and Neumann Laplacians in terms of their semiclassical counterpart. We show that the classical inequalities of Berezin–Li–Yau and Kröger, valid for Riesz exponents γ≥1$\gamma \ge 1$, extend to certain values γ<1$\gamma <1$, provided the underlying ...
Rupert L. Frank, Simon Larson
wiley   +1 more source

Card-Based Protocols Using Regular Polygon Cards [PDF]

, 2017
Kazumasa Shinagawa, Takaaki Mizuki, Jacob C. N. Schuldt, Koji Nuida, Naoki Kanayama, Takashi Nishide, Goichiro Hanaoka, Eiji Okamoto   +7 more
openalex   +1 more source

Wetlands as environments of early human occupation: A new classification for freshwater palaeowetlands

The Depositional Record, EarlyView.
A new classification for inland freshwater palaeowetlands to be used in the field or core laboratory by sedimentologists, providing examples from the Guadix Basin (southern Spain). Abstract Present wetlands have proven to be delicate, biodiverse ecosystems, that are natural sinks for CO2 and act as good indicators for climate changes.
S. Pla‐Pueyo, E. H. Gierlowski‐Kordesch   +1 more
wiley   +1 more source

On m-ovoids of regular near polygons [PDF]

, 2017
John Bamberg, Jesse Lansdown, Melissa Lee   +2 more
openalex   +1 more source

Polygonal tepee structures of Arabia

The Depositional Record, EarlyView.
Tepee structures on Sheybarah Island form polygonal microbial cemented crusts in the intertidal. Radiocarbon dating suggests they formed in the Holocene and reflect minor sea‐level changes, highlighting their value as palaeoenvironmental indicators. Satellite surveys identified 126 polygonal features, including coral reefs that may have developed on ...
Pauline Falkenberg, Sarima Vahrenkamp, Elisa Garugleri, Alexander Petrovic, Kai Hachmann, Viswasanthi Chandra, Volker C. Vahrenkamp   +6 more
wiley   +1 more source

A novel construction approach for the pore structure model principally focuses on the controllable roundness of rock particles

Deep Underground Science and Engineering, EarlyView.
Particle rounding effects comparison of different methods: (a), (b), and (c) are the rounding results using the B‐spline curve method with different R; (d), (e), and (f) are the results of vertex rounding substitution method with different rounding radii.
Jiabin Dong, Ning Yang, Yi Jin, Ying Wu, Dandan Liu, Junling Zheng, Jingyan Zhao   +6 more
wiley   +1 more source

Climate and microbial community composition drive shifts in ecosystem function along three parallel elevational gradients

Ecography, EarlyView.
Mountains are home to steep elevational gradients in environmental factors, biodiversity and ecosystem functionality. Though these gradients are tightly connected, little is known about the relative contribution of environmental and biotic factors in driving elevational changes in ecosystem functionality.
Congcong Shen, Michael K. Borregaard, Marcell K. Peters, Xin Jing, Akira S. Mori, Xinyu Xu, Zhi‐Ming Zhang, Lin Zhang, Jonathan M. Adams, Baodong Chen, Guo‐Xin Sun, Li‐Mei Zhang, Yuan Ge   +12 more
wiley   +1 more source

Dual Billiards, Fagnano Orbits, and Regular Polygons

, 2009
Serge Troubetzkoy
openalex   +2 more sources

One-, Two-, and Three-Dimensional Supramolecular Assemblies Based on Tubular and Regular Polygonal Structures of Pillar[ n ]arenes [PDF]

, 2019
Shixin Fa, Takahiro Kakuta, Tada‐aki Yamagishi, Tomoki Ogoshi   +3 more
openalex   +1 more source