Stars with short orbital periods at the center of our Galaxy offer a powerful probe of a supermassive black hole. Over the past 17 years, the W. M. Keck Observatory has been used to image the galactic center at the highest angular resolution possible today. By adding to this data set and advancing methodologies, we have detected S0-102, a star orbiting our Galaxy's supermassive black hole with ...

using piezoelectric patches the stress concentration around a hole on a plate under tension is reduced and controlled. to attain the reduction in stress two placements for piezoelectric patches is investigated. the first location is top/bottom of the hole with compression induced strain and the second is left/right of the hole with tension induced strains to control the stress flow. the result ...

Heterogeneous cellular networks (HCNs) usually exhibit spatial separation amongst base stations (BSs) of different types (termed tiers in this paper). For instance, operators will usually not deploy a picocell in close proximity to a macrocell, thus inducing separation amongst the locations of pico and macrocells. This separation has recently been captured by modeling the small cell locations b...

Manish Mehta Group 5: Haptic Interface CIS II: Paper Critical Review Selected Paper The Benefit of Force Feedback in Surgery: Examination of Blunt Dissection. Christopher R. Wagner, Nicholas Stylopoulos, Patrick G. Jackson, and Robert D. Howe. Presence: Teleoperators and Virtual Environments 2007 16:3, 252-262 Project Background and Paper Relevance I am part of group 5, and our project is creat...

A new technique for filling narrow and high-aspect ratio nanoscale via holes by laser-assisted direct imprint has been proposed and developed. In the process, the filling material (e.g., metals or Si) is first deposited onto the nano-via holes by a deposition method that has a poor step coverage and hence fills the holes partially with voids. Then a mirror-flat transparent plate (mold) is press...

This study examines the effects of location inaccuracies on two static sensor deployment and reconfiguration algorithms, Coverage-Preserving Node Scheduling Scheme (CPNSS) and Optimal Geographical Density Control (OGDC) algorithms, developed by Tian et al. 2002 and Zhang and Hou (2003) respectively. For the purposes of examining the extent to which the deployment and reconfiguration algorithms ...

because of production process and constrains conditions, circular graphene sheet may be opposed to structural defect and pin hole, respectively. some of the defects and pin hole on a circular graphene sheet can be considered as an eccentric hole on the sheet. hence, analyzing behavior of circular graphene sheet with an eccentric hole is important. free vibration of an eccentric annular graphene...