Integrated digital avionics to improve aircraft environmental control systems

Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/77327/1/AIAA-46929-196.pd

Unexpected effects of third-order cross-terms in heteronuclear spin systems under simultaneous radio-frequency irradiation and magic-angle spinning NMR

We recently noted [R. K. Harris, P. Hodgkinson, V. Zorin, J.-N. Dumez, B. Elena, L. Emsley, E. Salager, and R. Stein, Magn. Reson. Chem. 48, S103 (2010)10.1002/mrc.2636] anomalous shifts in apparent 1H chemical shifts in experiments using 1H homonuclear decoupling sequences to acquire high-resolution 1H NMR spectra for organic solids under magic-angle spinning (MAS). Analogous effects were also observed in numerical simulations of model 13C,1H spin systems under homonuclear decoupling and involving large 13C,1H dipolar couplings. While the heteronuclear coupling is generally assumed to be efficiently suppressed by sample spinning at the magic angle, we show that under conditions typically used in solid-state NMR, there is a significant third-order cross-term from this coupling under the conditions of simultaneous MAS and homonuclear decoupling for spins directly bonded to 1H. This term, which is of the order of 100 Hz under typical conditions, explains the anomalous behaviour observed on both 1H and 13C spins, including the fast dephasing observed in 13C{1H} heteronuclear spin-echo experiments under 1H homonuclear decoupling. Strategies for minimising the impact of this effect are also discussed

U.S. Representative John S. Monagan Radio Program with Guest William M.\u27Fishbait\u27 Miller

Radio program of U.S. Representative John S. Monagan of Connecticut with guest William M. Fishbait Miller, Doorkeeper of the U.S. House of Representatives: origin of Miller\u27s nickname; Pascagoula, Mississippi; Doctor of Law degree from Atlanta Law School in Georgia; history and responsibilities of the Doorkeeper; recycling program; John F. Kennedy; Winston Churchill; Charles De Gaulle; Madame Chang Kai-Chek; Queen Elizabeth; John McCormack; Sam Rayburn; freshmen members; service as Sergeant at Arms at the Democratic National Conventions; and Paul Douglas and Estes Kefauver at the Chicago Democratic National Convention

Faster pairings on special Weierstrass curves

This paper presents efficient formulas for computing cryptographic pairings on the curve y 2 = c x 3 + 1 over fields of large characteristic. We provide examples of pairing-friendly elliptic curves of this form which are of interest for efficient pairing implementations