609 research outputs found
Quantized fracture mechanics and related applications for predicting the strength of defective nanotubes
No full textNanoscale Weibull statistics
No full textIn this paper a modification of the classical Weibull statistics is developed for nanoscale applications. It is called nanoscale Weibull statistics. A comparison between nanoscale and classical Weibull statistics applied to experimental results on fracture strength of carbon nanotubes clearly shows the effectiveness of the proposed modification. A Weibull's modulus of similar to 3 is deduced for nanotubes. The approach can treat (also) a small number of structural defects, as required for nearly defect-free structures (e.g., nanotubes) as well as a quantized crack propagation (e.g., as a consequence of the discrete nature of matter), allowing to remove the paradoxes caused by the presence of stress intensifications
Strength of Nanostructures. Do materials become insensitive to flaws at nanoscale?: an answer based on Quantized Fracture Mechanics and Nanoscale Weibull Statistics
No full textNanoscale Weibull Statistics for nanofibers and nanotubes
No full textIn this paper a modification of the classical Weibull statistics is applied to nanostructures. A comparison is presented of "nanoscale" versus classical Weibull statistics in treating recent experimental results on the fracture strength of C nanofibers and nanotubes, and WS2 nanotubes. "Nanoscale" Weibull moduli of 3.8 for electrospun and then heat-treated carbon nanofibers, 2.7 for arc-discharge synthesized multiwalled carbon nanotubes, 1.8 for chemical vapor deposited multiwalled carbon nanotubes, and 3.0 for multiwalled WS2 nanotubes, are deduced
First Impressions of A. LaVonne Brown Ruoff as an Author
No full textIn January 1996 I enrolled in my first course in American Indian literatures. As a neophyte in the field, I searched for texts that could help me with the new concepts I was learning, ideas that would enhance my understanding of native authors and their works. One of the first books I purchased was American Indian Literatures: An Introduction, Bibliographic Review, and Selected Bibliography, by A. LaVonne Brown Ruoff (1990). A blurb on the back cover by SAIL summarizes my first impressions of the book, which I read from cover to cover, underlining, highlighting, and annotating: “The first thing likely to strike the reader upon opening LaVonne Ruoff’s new volume is the range, variety, and richness of American Indian Literatures. . . . Well conceived and well executed, [the book] will be welcomed by students and teachers who are approaching the subject for the first time.” As both student and teacher, I appreciated the comprehensive introduction that Ruoff provides in this work. For someone who was at the beginning of the learning curve, the book was a welcome resource. In fact, I kept hoping that she would eventually publish a new edition of this work, bringing it up to date with the wealth of publications that have followed since its first appearance
Telluride in the Film Festival Galaxy
No full textAbout the Book
For those who cherish art cinema, the Telluride Film Festival is America\u27s best known and most celebrated film festival. It is the quintessential cinephile film festival in the USA, and a destination festival prototype in the galaxy of festivals. It has been spoken and written about a lot in popular media, yet it has never been the subject of a monograph. This is the first study to explore Telluride\u27s multi-faceted contributions to the cultural life of the United States and beyond.
About the Author
Jeffrey Ruoff is a film historian, documentary filmmaker, and an associate professor of Film and Media Studies at Dartmouth College in New Hampshire, USA. In 2012, his anthology Coming Soon to a Festival Near You: Programming Film Festivals was published by St Andrews Film Studies. He produced and directed the documentary Still Moving: Pilobolus at Forty (2012) about the internationally renowned American dance company Pilobolus. In addition to writing academic articles and books Ruoff regularly publishes Op-Eds and reviews in popular newspapers and magazines.
About the Electronic Publication
This electronic publication of Telluride in the Film Festival Galaxy was made possible with the permission of the author. The University Press of New England created Kindle, EPUB and PDF files.
Rights Information
Creative Commons Attribution-NonCommercial License © Jeffrey Ruof
CHARGE REARRANGEMENT IN (HCN)2 AND (HCN)3***
No full text Work supported by NSF and PRF. R. S. Ruoff, T. Emilsson, C. Chuang, T. D. Kiots, and H. S. Gutowsky. Chem. Phys. Letters 138, 553 (1987). R.S. Ruoff, T. Emlisson. T. D. Kiots, C. Chuang, and H. S. Gutowsky, J. Chem. Phys., submitted. E. J. Campbell and S. G. Kukolich, Chem. Phys. 76, 225 (1983).Author Institution: Noyes Chemical Laboratory, University of IllinoisCharge rearrangement during cluster formation may be determined from its effects upon the dipole moments u and the electric field gradients of the monomeric units,provided that corrections can be made for their vibrational averaging. An isotopic substitution method has enabled us to obtain vibrational amplitudes in the linear and A dipole moment of 6.552(35) D has been reported for the dimer3 and we have found 10.6(2) D for the These lead to induced dipole moments Au of 0.703(3) D for the dimer and 1.75(10) D for the trimer. A similar analysis was made of . A mutual polarization model was used to predict the induced dipole moments from the four known electrical multipole moments of HCN and its bond polarizabilities. The results are 0.703 D for the dimer and 1.68 D for the trimer. The calculations give ratios of the dipoles induced in the C-N bonds which are essentially identical with the ratios of the experimental . Equations are derived for calculation of Au of an infinite H-bonded chain and are applied to HCN. The convergence of multipale expansions for the electric field due to a molecular charge distribution will be discussed. The mutual polarization model works so well on HCN dimer and trimer that any charge transfer between the HCN monomers seems likely to be very small or negligible
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