A computational framework for analyzing and designing efficient flapping flight vehicles is presented. Two computational tools are considered: a Betz Criterion code proposed by Hall et. al., and an accelerated, unsteady, potential flow solver. The parameters considered in this paper are: the flapping frequency, the flapping amplitude in both up-down and forward-aft directions, and the addition ...

in this paper the effects of non-linearity of suspension on dynamic behavior of a railway wheelset has been studied. this wheelset has four degrees of freedom that with two constraints it has reduced to two degrees of freedom. vermeulen-johnson theory has been used to calculate contact forces between wheel and rail. in this study the creep coefficients have considered constant. any linearizatio...

in this paper, penetration of high velocity impact of 4340 steel and tungsten carbide projectiles with specific shapes in to ceramic armor that includes 10 mm alumina (95%) is considered analytically and simulated with ls-dyna software. bernoulli equation used to consider the penetration velocity in ceramics, shows that the penetration is better and easier by increasing projectile density. the ...

nationally representative sample of adults ]60 years in the United States, 2001 2002 Regan L. Bailey*, James L. Mills, Elizabeth A. Yetley, Jaime J. Gahche, Christine M. Pfeiffer, Johanna T. Dwyer, Kevin W. Dodd, Christopher T. Sempos, Joseph M. Betz and Mary Frances Picciano National Institutes of Health, Office of Dietary Supplements, Bethesda, MD, USA; National Institutes of Health, Eunice K...

2. Lockemann U, Püschel K, Schäfer A, Schneider V, Geserick G, Gillner G, Pietrzak T, Alcarez R, Varchmin-Schultheiß K, Birkholz M, Gabler W, Ramms M, Müller E, Jacob B, Springer E, Anschütz U, Hausmann R, Trübner K, Klöppel A, Roggendorf M, Brettel HF, Pollak S, Riße M, Kernbach-Wighton G, Weinke H, Kleiber M, Heinemann A, SanchezHenke M, Wischhusen F, Eidam J, Mattern R, Karhunen P, Wilske J,...

The contemporary competitive environment has been and continues to be driven by technological revolution, globalization, hypercompetition, extreme emphasis on price, quality, and customer satisfaction—with a resultant increasing focus on innovation (Hitt et al., 1998). These factors cause increased competitive complexity and dynamism, requiring an increasing emphasis on innovation as a strategi...

The previously characterized ( Rehm , H., and Betz, H. (1982) J. Biol. Chem. 257, 10015-10022) neuronal binding protein for the presynaptic neurotoxin beta-bungarotoxin (beta-BuTx) was solubilized from synaptic membrane fractions of chick brain using the nonionic detergent Triton X-100. 125I-beta-BuTx bound to the solubilized protein with a dissociation constant (KD) of 1.9 +/- 0.1 nM. This bin...

This paper proposes a revised version of the original Domain-Specific Risk-Taking (DOSPERT) scale developed by Weber, Blais, and Betz (2002) that is shorter and applicable to a broader range of ages, cultures, and educational levels. It also provides a French translation of the revised scale. Using multilevel modeling, we investigated the risk-return relationship between apparent risk taking an...