Deformable vehicle wheel Patent

Resilient vehicle wheel for lunar surface trave

Bread board float zone experiment system for high purity silicon

A breadboard float zone experimental system has been established at Westech Systems for use by NASA in the float zone experimental area. A used zoner of suitable size and flexibility was acquired and installed with the necessary utilities. Repairs, alignments and modifications were made to provide for dislocation free zoning of silicon. The zoner is capable of studying process parameters used in growing silicon in gravity and is flexible to allow trying of new features that will test concepts of zoning in microgravity. Characterizing the state of the art molten zones of a growing silicon crystal will establish the data base against which improvements of zoning in gravity or growing in microgravity can be compared. 25 mm diameter was chosen as the reference size, since growth in microgravity will be at that diameter or smaller for about the next 6 years. Dislocation free crystals were growtn in the 100 and 111 orientations, using a wide set of growth conditions. The zone shape at one set of conditions was measured, by simultaneously aluminum doping and freezing the zone, lengthwise slabbing and delineating by etching. The whole set of crystals, grown under various conditions, were slabbed, polished and striation etched, revealing the growth interface shape and the periodic and aperiodic natures of the striations

Quantum phase estimation algorithm in presence of static imperfections

We study numerically the effects of static imperfections and residual couplings between qubits for the quantum phase estimation algorithm with two qubits. We show that the success probability of the algorithm is affected significantly more by static imperfections than by random noise errors in quantum gates. An improvement of the algorithm accuracy can be reached by application of the Pauli-random-error-correction method (PAREC).Comment: 5 pages, 5 figures. Research avilable at http://www.quantware.ups-tlse.fr

Kondo effect of Co adatoms on Ag monolayers on noble metal surfaces

The Kondo temperature $T_K$ of single Co adatoms on monolayers of Ag on Cu and Au(111) is determined using Scanning Tunneling Spectroscopy. $T_K$ of Co on a single monolayer of Ag on either substrate is essentially the same as that of Co on a homogenous Ag(111) crystal. This gives strong evidence that the interaction of surface Kondo impurities with the substrate is very local in nature. By comparing $T_K$ found for Co on Cu, Ag, and Au (111)-surfaces we show that the energy scale of the many-electron Kondo state is insensitive to the properties of surface states and to the energetic position of the projected bulk band edges.Comment: 4 pages, 3 figure

Local pressure-induced metallization of a semiconducting carbon nanotube in a crossed junction

The electronic and vibrational density of states of a semiconducting carbon nanotube in a crossed junction was investigated by elastic and inelastic scanning tunneling spectroscopy. The strong radial compression of the nanotube at the junction induces local metallization spatially confined to a few nm. The local electronic modifications are correlated with the observed changes in the radial breathing and G-band phonon modes, which react very sensitively to local mechanical deformation. In addition, the experiments reveal the crucial contribution of the image charges to the contact potential at nanotube-metal interfaces

Threat Detection From phenotypic Facial Features

Previous research has demonstrated people\u27s ability to accurately and quickly make snap judgments of trustworthiness from viewing individuals\u27 faces (Todorov, Pakrashi, & Oosterhof, 2009; Willis & Todorov, 2006). The study of how human beings make meaningful predictions from phenotypic facial features about trustworthiness, among other traits, warrants additional scrutiny and investigation. Further, other research suggests the facial width to height ratio (fWHR) is a more specific indicator used by human beings to gauge, often accurately gauge, trustworthiness with some accuracy. As such, past research found participants rated people with larger fWHRs as less trustworthy and more aggressive (Carré & McCormick, 2008; Stirrat & Perrett, 2010). The present study had four major aims. The study\u27s first aim was to extend the current literature to explore whether faces of the FBI\u27s Ten Most Wanted Fugitives (FBI) would have larger fWHRs than faces of Nobel Peace Prize or Order of Canada (NPP/OoC) recipients. The study\u27s second aim was to replicate previous research exhibiting participants\u27 ability to accurately discern less trustworthy individuals (i.e., the FBI\u27s Ten Most Wanted Fugitives) from more trustworthy individuals (i.e., Nobel Peace Prize or Order of Canada recipients). The third aim of the study was to replicate fWHR viii findings to test the inverse relationship between fWHR and trustworthiness ratings. Finally, the fourth aim of the study entailed investigating whether participants endorsing psychopathic traits were more attracted to individuals who, arguably, have greater psychopathic traits (i.e., FBI\u27s Ten Most Wanted Fugitives). Results yielded mixed support for the above aims. The present study did not uncover a significant difference in fWHRs between the FBI\u27s Ten Most Wanted Fugitives and Nobel Peace Prize or Order of Canada recipients. Additionally, results did not indicate an inverse relationship between fWHR and trustworthiness ratings. However, results supported participants’ ability to accurately and reliably discern the FBI\u27s group from NPP/OoC recipients. Further, results revealed differences among psychopathy groups. Participants with the highest psychopathy scores endorsed significantly higher attractiveness and truthfulness ratings than participants with the lowest psychopathy scores, regardless of picture type

Effects of simplifying assumptions on optimal trajectory estimation for a high-performance aircraft

When analyzing the performance of an aircraft, certain simplifying assumptions, which decrease the complexity of the problem, can often be made. The degree of accuracy required in the solution may determine the extent to which these simplifying assumptions are incorporated. A complex model may yield more accurate results if it describes the real situation more thoroughly. However, a complex model usually involves more computation time, makes the analysis more difficult, and often requires more information to do the analysis. Therefore, to choose the simplifying assumptions intelligently, it is important to know what effects the assumptions may have on the calculated performance of a vehicle. Several simplifying assumptions are examined, the effects of simplified models to those of the more complex ones are compared, and conclusions are drawn about the impact of these assumptions on flight envelope generation and optimal trajectory calculation. Models which affect an aircraft are analyzed, but the implications of simplifying the model of the aircraft itself are not studied. The examples are atmospheric models, gravitational models, different models for equations of motion, and constraint conditions