Multi-beam range imager for autonomous operations

For space operations from the Space Station Freedom the real time range imager will be very valuable in terms of refuelling, docking as well as space exploration operations. For these applications as well as many other robotics and remote ranging applications, a small potable, power efficient, robust range imager capable of a few tens of km ranging with 10 cm accuracy is needed. The system developed is based on a well known pseudo-random modulation technique applied to a laser transmitter combined with a novel range resolution enhancement technique. In this technique, the transmitter is modulated by a relatively low frequency of an order of a few MHz to enhance the signal to noise ratio and to ease the stringent systems engineering requirements while accomplishing a very high resolution. The desired resolution cannot easily be attained by other conventional approaches. The engineering model of the system is being designed to obtain better than 10 cm range accuracy simply by implementing a high precision clock circuit. In this paper we present the principle of the pseudo-random noise (PN) lidar system and the results of the proof of experiment

Under the Radar: The Role of Invisible Discourse in Understanding Class‐Based Privilege

Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/90533/1/j.1540-4560.2011.01739.x.pd

Salt Effects in the Solvolysis of Some Alkyl Chlorides in Different Solvent Systems

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Social Dominance Orientation and John Henryism at the Intersection of Race and Class

Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/92408/1/j.1467-9221.2012.00889.x.pd

Stopping Light All-Optically

We show that light pulses can be stopped and stored all-optically, with a process that involves an adiabatic and reversible pulse bandwidth compression occurring entirely in the optical domain. Such a process overcomes the fundamental bandwidth-delay constraint in optics, and can generate arbitrarily small group velocities for light pulses with a given bandwidth, without the use of any coherent or resonant light-matter interactions. We exhibit this process in optical resonator systems, where the pulse bandwidth compression is accomplished only by small refractive index modulations performed at moderate speeds. (Accepted for publication in Phys. Rev. Lett. Submitted on Sept. 10th 2003)Comment: 18 pages including 3 figures. Accepted for publication in Phys. Rev. Let

“We're Not Speaking Any More”: A Cross-Cultural Study of Intergenerational Cut-Offs

This study of individuals in the U.S. and Tamil Nadu, India, examines the reasons given for voluntary limitations on contact between adult children and their parents (“cut-offs”). We examine the possibly that these breeches occur as a solution to the problem of negative social relationships by looking at the different cultural contexts of the U.S. and India. We challenge Bowen's (1978) assertion that intergenerational cut-offs always occur in the vain attempt to promote differentiation and propose a system for categorizing the reasons given for cut-offs, and explore the research and practice implications of the findings. Although based on a limited sample, this paper provides an important contribution to this understudied aspect of interpersonal relationships.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/42985/1/10823_2004_Article_470241.pd