Magnetism of Covalently Functionalized Carbon Nanotubes

We investigate the electronic structure of carbon nanotubes functionalized by adsorbates anchored with single C-C covalent bonds. We find that, despite the particular adsorbate, a spin moment with a universal value of 1.0 $\mu_B$ per molecule is induced at low coverage. Therefore, we propose a mechanism of bonding-induced magnetism at the carbon surface. The adsorption of a single molecule creates a dispersionless defect state at the Fermi energy, which is mainly localized in the carbon wall and presents a small contribution from the adsorbate. This universal spin moment is fairly independent of the coverage as long as all the molecules occupy the same graphenic sublattice. The magnetic coupling between adsorbates is also studied and reveals a key dependence on the graphenic sublattice adsorption site.Comment: final version, improved discussion about calculations and defect concentratio

Improving Textbook Learning with S4R: A Strategy for Teachers, Not Students

The purpose of this article is to introduce S4R, a reading study system designed to improve comprehending and remembering of information contained in a textbook. While S4R certainly can be utilized as a self-study method similar to those identified above, the focus here will be on S4r as it is used by the teacher in the classroom. The system will be briefly described, followed by initial research findings and implications for use

Forbidden transitions in the helium atom

Nonrelativistically forbidden, single-photon transition rates between low lying states of the helium atom are rigorously derived within quantum electrodynamics theory. Equivalence of velocity and length gauges, including relativistic corrections is explicitly demonstrated. Numerical calculations of matrix elements are performed with the use of high precision variational wave functions and compared to former results.Comment: 11 pages, 1 figure, submitted to Phys. Rev.

The Rise of the Bentley and Broad War Boys: Converting Nascent Automotive and Computer Technologies into Mainstream Sports

Although technology is an important aspect of every type of sport, only some sports are so dependent on technology that they could not exist without strong financial and technological contributions of other businesses seeing benefits in sponsoring teams. One such sport originated at the end of the 19th century: motorsports. Roughly a century later, another sport strongly dependent on technology started its rise: e-sports. To maintain interest in these sports, there continues to be a need to make the technology attractive to the general public. As e-sports’ popularity is soaring, it is of interest to reflect on which factors played a role in this rise in popularity, how they continue to influence e-sports’ popularity and to what extent they compare to early factors involved in raising the popularity of motorsports. The paper will show that, for both motorsports and e-sports, the real drivers to develop these technologies into mainstream sports did not arise from the athletes nor from industries directly benefitting from enhanced public exposure to these sports. Rather, media and other industries attempting to reach out to specific consumer communities and looking to remain modern were strongly involved in evolving both types of sports into their current popularity. Based on the effects of media portrayal of the popularity of motorsports throughout its history, the paper identifies several contemporary issues e-sports will need to resolve in order to maintain its popularity

The Rise of the Bentley and Broad War Boys: Converting Nascent Automotive and Computer Technologies into Mainstream Sports

Although technology is an important aspect of every type of sport, only some sports are so dependent on technology that they could not exist without strong financial and technological contributions of other businesses seeing benefits in sponsoring teams. One such sport originated at the end of the 19th century: motorsports. Roughly a century later, another sport strongly dependent on technology started its rise: e-sports. To maintain interest in these sports, there continues to be a need to make the technology attractive to the general public. As e-sports’ popularity is soaring, it is of interest to reflect on which factors played a role in this rise in popularity, how they continue to influence e-sports’ popularity and to what extent they compare to early factors involved in raising the popularity of motorsports. The paper will show that, for both motorsports and e-sports, the real drivers to develop these technologies into mainstream sports did not arise from the athletes nor from industries directly benefitting from enhanced public exposure to these sports. Rather, media and other industries attempting to reach out to specific consumer communities and looking to remain modern were strongly involved in evolving both types of sports into their current popularity. Based on the effects of media portrayal of the popularity of motorsports throughout its history, the paper identifies several contemporary issues e-sports will need to resolve in order to maintain its popularity

Money n\u27 Motion - Born to be Wild

There are intriguing parallels between motoring and personal investing: the romance, the thrilling movement, and the freedom; the banality, the enervating repetition, and the entrapment; the subconsciously seductive appeal of crashes that ends it all. Consequently, there are intriguing parallels between the automobile and accounting, without which the activities of motoring and personal investing, respectively, would be severely attenuated, if they were possible at all. And there are intriguing parallels between popular media and accounting education, which are responsible for the enculturation processes that perpetuate the beliefs that in motoring and personal investing, by means of automobiles and accounting, we can be independent, we can be free, we can take control of our lives, and we can rise above the barriers of our social classes. The historian George W. Pierson\u27s mobility thesis explains these parallels. Motoring is not merely a fruitful metaphor for personal investing, automobiles for accounting, and popular media for accounting education. Motoring and personal investing are just two among many manifestations of the mobility which is characteristically American. Physically and financially, Americans need to be in motion