1,462,835 research outputs found
Advanced Recital: Charlotte Hwang and Rawslyn Ruffin, composition
No full textThis recital is given in partial fulfillment of the requirements for the Master of Music degreeMs. Hwang is a student of Arthur Gottschalk. Ms. Ruffin is a student of Paul Cooper.The Bug-A-Boo Song Cycle (Poems by Ogden Nash), Rawslyn Ruffin (1959) -- Brass Quintet, Charlotte Hwang (b. 1959) -- Variations on a Theme by R. F. T. Schlumberger, Rawslyn Ruffin -- Three Character Sketches, Poems by e. e. cummings, Charlotte Hwang -- Brass Quintet in Five Movements, Rawslyn Ruffin -- Perspicuity, Charlotte Hwang -- Fantasia/Bolero, Rawslyn Ruffi
Effect of debonding on natural frequencies and frequency response functions of honeycomb sandwich beams
No full textThe natural frequencies of honeycomb sandwich beams having debonding or delamination embedded between the face-layer laminates and the honeycomb core are studied herein. A theoretical analysis of the effect of the extent of debonding on the flexural stiffness and on the natural frequency is compared with experimental observations. In this analysis the free vibration of the delaminated sandwich beams is studied using the split sandwich beam model, and the equations of motion are set up for the undelaminated region of the sandwich beam and the delaminated region of the laminated beams. Finally, changes in the peaks and valleys of the frequency response functions (FRFs) due to delamination are examined. By using the modal parameter identification method [H.Y. Kim, W. Hwang, Compos. Struct., 2001 (in press)], the extent of delamination of the sandwich beams can be identified in terms of the natural frequencies and damping ratios of the debonded beams. Vibration testing was conducted on honeycomb sandwich beams with carbon/epoxy laminated composite faces and Nomex-aramid honeycomb core. Agreement between the predictions of the model and experimental results is good. (C) 2001 Elsevier Science Ltd. All rights reserved.X1155sciescopu
Fatigue life prediction of circular notched CFRP laminates
No full textFatigue life prediction and fatigue behavior of circular notched carbon fiber reinforced plastic laminates are presented. Point and average stress criteria proposed by Whitney and Nuismer are generalized to fatigue fracture criteria for notched laminates. Residual strength degradation model and the assumptions on the stress redistribution are introduced during the derivation of prediction equations. S-N curve, Basquin's relation, and Hwang and Han's fatigue life prediction equation (FLPE) 1 are chosen for evaluation of residual strength of unnotched laminates and six prediction equations are derived. Experiments are performed using carbon fiber reinforced plastic laminates. Presented prediction equations are reasonably close to experimental data and proposed approach is found to be suitable to predict fatigue life of notched composite laminates. (C) 1999 Published by Elsevier Science Ltd. All rights reserved.X1111sciescopu
Efficient Improvements on Hwang-Chen's Multi-Proxy Multi-Signature Schemes
No full textLyuu and Wu proposed a new insider attack to forge multi-proxy multi-signature in Hwang-Chen's scheme without clerks. On Hwang-Chen's scheme with clerks, they also proposed their improvement. Except the extra computation cost announced by Lyuu and Wu, the communication cost cannot be reduced in their scheme while the cost can be reduced in Hwang-Chen's scheme. Moreover, their improvement needs a center which is more trustworthy than the one in Hwang-Chen's scheme. To remove extra costs and overhead of trustworthy centers, two efficient improvements are proposed.中華民國資訊安全學會國內20050609~20050610紙本Y臺北市, 臺
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Retraction: Site‐specific recombination of nitrogen‐fixation genes in cyanobacteria by XisF–XisH–XisI complex: Structures and models, William C. Hwang, James W. Golden, Jaime Pascual, Dong Xu, Anton Cheltsov, Adam Godzik
Full text linkThe above article from the Proteins: Structure, Function, and Bioinformatics, published online on 1 September 2014 in Wiley Online Library as Accepted Article (http://onlinelibrary.wiley.com/doi/10.1002/prot.24679/full), has been retracted by agreement between William C. Hwang, James W. Golden, Jaime Pascual, Dong Xu, Anton Cheltsov, Adam Godzik, the Editor‐in‐Chief, Bertrand E. Garcia‐Moreno, and Wiley Periodicals, Inc. The retraction has been agreed because submission was made without agreement from co‐author Adam Godzik
Neutrons and antiprotons in ultrahigh-energy cosmic rays
No full textThe neutron fraction in the very high-energy cosmic rays near the Greisen-Zatsepin-Kuzmin (GZK) cutoff energy is analyzed by taking into account the time dilation effect of the neutron decays and also the pion photoproduction behaviors above the GZK cutoff. We predict a non-trivial neutron fraction above the GZK cutoff and a negligibly small neutron fraction below. However, there should be a large antiproton fraction in the high-energy cosmic rays below the GZK cutoff in several existing models for the observed cosmic-ray events above and near the GZK cutoff. Such a large antiproton fraction can manifest itself by the muon charge ratio mu(+)/mu(-) in the collisions of the primary nucleon cosmic rays with the atmosphere, if there is no neutron contribution. We suggest to use the muon charge ratio as one of the information to detect the composition of the primary cosmic rays near or below the GZK cutoff.Physics, NuclearPhysics, Particles & FieldsSCI(E)4ARTICLE3467-4712
Toward Understanding the Quark Parton Model of Feynmant
No full textThe quark parton model of Feynman, which has been used for analyses of high energy
physics experiments, invokes a set of parton distributions in the description of the nucleon
structure (the probability concept), contrary to the traditional use of wave functions in nuclear
and medium ener,7 physics for structural studies (the amplitude concept). In this paper, I first
review briefly how the various parton distributions of a nucleon may be extracted from high energy
physics experiments. I then proceed to consider how the sea distributions of a free nucleon at low
and moderate Q2 (e.g., up to 20 Ge?) may be obtained in the meson-baryon picture, a proposal
made by Hwang, Speth, and Brown. Using the form factors associated with the couplings of
mesons to baryons such as nNN, xNA, and KNA couplings which are constrained by the CCFR
neutrino data, we find that the model yields predictions consistent with the CDHS and Fermilab
E61S data on the sea-to-valence ratio. We also find that the recent finding by the New Muon
Collaboration (NMC) on the violation of the Gottfried sum rule can be understood quantitatively.
Finally, we consider, using the pion as the example, how valence quark distributions of a hadron
may be linked to the hadron wave function written in the light-cone language. Specifically, we
use the leading pion wave function that is constrained by the QCD sum rules, and find that, at Q*
= (0.5 Gev2, the leading Fock component accounts for about 40 % of the observed valence quark
distributions in the pion. The question of how to generate the entire valence quark distributions
from the valence quark distribution calculated from the leading Fock component is briefly
considered again using the specific proposal of Hwang, Speth, and Brown
Nanophysoderes dentiscutum Hwang & Weirauch 2017, comb. nov.
No full textNanophysoderes dentiscutum (Bergroth, 1906) comb. nov. Figs 10–11, 13; Appendix Physoderes dentiscutum Bergroth, 1906: 16. Diagnosis As in generic description. Material examined Holotype INDONESIA: ♀, Irian Jaya, W New Guinea, 4.24891° S, 135.79065° E, 285 m, 1869, Higgins leg. (UCR_ENT 00037370) (ISNB). Redescription As in generic description.Published as part of Hwang, Wei Song & Weirauch, Christiane, 2017, Uncovering hidden diversity: phylogeny and taxonomy of Physoderinae (Reduviidae, Heteroptera), with emphasis on Physoderes Westwood in the Oriental and Australasian regions, pp. 1-118 in European Journal of Taxonomy 341 on page 61, DOI: 10.5852/ejt.2017.341, http://zenodo.org/record/383279
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