Correlation of low speed wind tunnel and flight test data for V/STOL aircraft

The XV-5B fan-in-wing aircraft and the Y0V-10 RCF rotating cylinder flap aircraft were subjected to wind tunnel tests. These tests were conducted specifically to provide for correlation between wind tunnel and inflight aerodynamics and noise test data. Correlation between aerodynamic and noise data are presented and testing techniques that are related to the accuracy of the data, or that might affect the correlations, are discussed

Correlation of wind-tunnel and flight-test aerodynamic data for five V/STOL aircraft

Correlation of wind tunnel and flight test aerodynamic data for five V/STOL aircraf

Using rewards and penalties to obtain desired subject performance

Operant conditioning procedures, specifically the use of negative reinforcement, in achieving stable learning behavior is described. The critical tracking test (CTT) a method of detecting human operator impairment was tested. A pass level is set for each subject, based on that subject's asymptotic skill level while sober. It is critical that complete training take place before the individualized pass level is set in order that the impairment can be detected. The results provide a more general basis for the application of reward/penalty structures in manual control research

Quasi-circular Orbits for Spinning Binary Black Holes

Using an effective potential method we examine binary black holes where the individual holes carry spin. We trace out sequences of quasi-circular orbits and locate the innermost stable circular orbit as a function of spin. At large separations, the sequences of quasi-circular orbits match well with post-Newtonian expansions, although a clear signature of the simplifying assumption of conformal flatness is seen. The position of the ISCO is found to be strongly dependent on the magnitude of the spin on each black hole. At close separations of the holes, the effective potential method breaks down. In all cases where an ISCO could be determined, we found that an apparent horizon encompassing both holes forms for separations well inside the ISCO. Nevertheless, we argue that the formation of a common horizon is still associated with the breakdown of the effective potential method.Comment: 13 pages, 10 figures, submitted to PR

W. H. Cook to Unknown (25 March 1862)

Rumors of advancements and retreats, his current location, the company\u27s health, mail route problems and supplieshttps://egrove.olemiss.edu/ciwar_corresp/1573/thumbnail.jp

Translanguaging identities: creating transnational space through flexible multilingual practices amongst Chinese university students in the UK

There are thousands of ethnic Chinese students from very different backgrounds in British universities today, a fact that has not been fully appreciated or studied from an applied linguistics perspective. For example, there are third- or fourth-generation British-born Chinese; there are students from China, Taiwan, Hong Kong and Singapore who have received whole or part of their primary and secondary education in Britain; and there are Chinese students who completed their schooling in their home countries. To add to the diversity of the Chinese student population, several distinctive varieties of Chinese are spoken as well as different varieties of English and other languages. In terms of their choice of language and social networks, the Chinese students have several options, including, for example, staying with their own language variety group (e.g. Cantonese, Mandarin); staying with their own region-of-origin group (e.g. British-born, Mainland Chinese, Taiwanese, Hong Kong); and creating new transnational and multilingual groupings. This article focuses on a group of Chinese university students who have chosen to create transnational and multilingual networks. Through analysis of narrative data and ethnographic observations, we explore issues such as their socio-cultural identification processes, the interactions between their linguistic and political ideologies; their multilingual practices and what they have learned from being part of this new social space

Relativistic stars in differential rotation: bounds on the dragging rate and on the rotational energy

For general relativistic equilibrium stellar models (stationary axisymmetric asymptotically flat and convection-free) with differential rotation, it is shown that for a wide class of rotation laws the distribution of angular velocity of the fluid has a sign, say "positive", and then both the dragging rate and the angular momentum density are positive. In addition, the "mean value" (with respect to an intrinsic density) of the dragging rate is shown to be less than the mean value of the fluid angular velocity (in full general, without having to restrict the rotation law, nor the uniformity in sign of the fluid angular velocity); this inequality yields the positivity and an upper bound of the total rotational energy.Comment: 23 pages, no figures, LaTeX. Submitted to J. Math. Phy

Black Hole Data via a Kerr-Schild Approach

We present a new approach for setting initial Cauchy data for multiple black hole spacetimes. The method is based upon adopting an initially Kerr-Schild form of the metric. In the case of non-spinning holes, the constraint equations take a simple hierarchical form which is amenable to direct numerical integration. The feasibility of this approach is demonstrated by solving analytically the problem of initial data in a perturbed Schwarzschild geometry.Comment: 13 pages, RevTeX forma