The '5 lei coin' problem of Titeica is generalized to circles of arbitrary radii.

Article discussing studies of the relationship between the Stieltjes sums and the elementary symmetric sums.

Book chapter on the prediction of partition coefficients and permeability of drug molecules in biological systems with Abraham model solute descriptors derived from measured solubilities and water-to-organic solvent partition coefficients.

In this paper, the authors show using scanning tunneling microscopy, spectroscopy, and ab initio calculations that several intercalation structures exist for Na in epitaxial graphene on SiC(0001). Intercalation takes place at room temperature and Na electron-dopes the graphene. It intercalates in-between single-layer graphene and the carbon-rich interfacial layer. It also penetrates beneath the interfacial layer and decouples it to form a second graphene layer. This decoupling is accelerated by annealing and is verified by direct Na deposition onto the interface layer. The authors' observations show that intercalation in graphene is fundamentally different than in graphite and is a versatile means of electronic control.

Article discussing research on charge transfer equilibria in ambient-exposed epitaxial graphene on (0001) 6 H-SiC.

In this article, the authors study a set of cooperatively interacting units at criticality, and prove with analytical and numerical arguments that they generate the same renewal non-Poisson intermittency as that produced by blinking quantum dots.

Article discussing research on cooperation and neural systems and bridging complexity and periodicity.

Article on the activation of water on the TiO2 (110) surface.

This article discusses complex materials for molecular spintronics applications.

This article discusses cooperation-induced topological complexity and the emergence of intelligence.

Article discussing the criticality of transition processes in neurophysiology.

Article discussing the dynamic networking and dynamic networks in complex research on psychophysics, psychology, and neurophysiology.

Article discussing phonon engineering in nanostructures and controlling interfacial thermal resistance in multilayer-graphene/dielectric heterojunctions.

This article discusses electric field induced phase transitions in polymers.

This article discusses multiple coexisting intercalation structures of sodium in peitaxial graphene-SiC interfaces.

Article describing the discovery of argon, helium, and other inert gases by Lord Rayleigh, Sir William Ramsay, and other collaborators. Ramsay also characterized the noble gases and classified them within the structure of the Periodic Table of Elements.

Front cover of the fall 2012 issue of The Hexagon, which features an image of the "ring of fire" that occurred during the annular eclipse on May 20, 2012. The photograph was taken in Brownfield, Texas a few minutes before sunset. The inside cover contains a table of contents, a staff list, an editorial, and details about the cover photograph.

El Espejo literary journal contains writing by Spanish students at the University of North Texas including essays in Spanish literature and linguistics and creative pieces such as poetry and short stories.

Article discussing theories on the evaluation of philosophy and philosophers and the peer review process.

Article discussing research on biocultural ethics as a way to overcome biocultural homogenization.

This article discusses integrating ecology and environmental ethics.

Article on the functional assessment of the Medicago truncatula NIP/LATD protein demonstrating that it is a high-affinity nitrate transporter.

This paper accompanies a poster presentation on the anti-diabetic and cholesterol-lowering effects of common and cassia cinnamon (Cinnamomum verum and C. aromaticum).

This article is in response to an authors' reply to 'Use of prior odds for missing persons identifications.' This response is to the reply by Alex Biedermann, Franco Taroni, and Pierre Margot.