Activity Representation from Video Using Statistical Models on Shape Manifolds

Abstract :-
Activity recognition from video data is a key computer vision problem with applications in surveillance, elderly care, etc. This problem is associated with modeling a representative shape which contains significant information about the underlying activity. In this dissertation, we represent several approaches for view-invariant activity recognition via modeling shapes on various shape spaces and Riemannian manifolds. The first two parts of this dissertation deal with activity modeling and recognition using Continue reading Activity Representation from Video Using Statistical Models on Shape Manifolds

Active microring and microdisk optical resonators on indium phosphide

Abstract :-
Photonic or optical logic holds the promise of ultra-fast logic circuits with capability for speeds beyond what is possible using conventional silicon electronics. However, the jump from theory to practice has a high barrier set by critical issues such as integration, scalability and power requirements. Optical micro-resonator based schemes have the potential of addressing some of these issues. This thesis focuses on the development of active InGaAsP/InP microdisk and microring optical resonators to lower Continue reading Active microring and microdisk optical resonators on indium phosphide

Attenuation Behavior of Solid Dense Random Media at Microwave Frequencies

Abstract :-
To better understand scattering from nontenuous dense random media such as sea ice and snow, attenuation measurements have been performed on two different types of random media with ka values ranging from 0.5 to 0.7, and 1.5 to 2.1. The following paper describes, briefly, experimental results from wave propagation in plane slabs of finite thickness composed of: (1) a random distribution of identical, finite scatters; and (2) a random distribution of scatters with narrow size distribution. Continue reading Attenuation Behavior of Solid Dense Random Media at Microwave Frequencies

Error Correcting Codes for Cooperative Broadcasting

Error Correcting Codes for Cooperative Broadcasting

Abstract :-
This talk considers the design and implementation of error correcting codes for cooperative broadcasting in wireless networks. Focus is on the case of two cooperating sources transmitting two classes of information to a single receiver. This case was first introduced in the seminal work of Bergmans and Cover and referred to as “over the air mixing”. Two levels of protection are provided using two low-density parity-check (LDPC) codes combined using Plotkin’s |u|u+v|-construction. Continue reading Error Correcting Codes for Cooperative Broadcasting

3D Integration, Temperature Effects, and Modeling

3D Integration, Temperature Effects, and Modeling

Abstract :-
Practical limits to device scaling are threatening the growth of integrated circuit (IC) technology. A breakthrough architecture is needed in order to realize the increased device density and circuit functionality that future high performance ICs demand. 3D integration is being considered as this breakthrough architecture. In this thesis, the limits to scaling are noted and the feasibility of overcoming these limits using 3D integration is presented. Continue reading 3D Integration, Temperature Effects, and Modeling