Self-reconfiguring (SR) robots are modular systems that can autonomously change shape, or reconfigure , for increased versatility and adaptability in unknown environments. In this thesis, we investigate planning and control for systems of...
Manifolds (Mathematics) Geodesics (Mathematics) Space and time.
We investigate weak and strong refocusing of light rays in a space-time and related concepts. A strongly causal space-time ( X^ n +1 , g ) is emphstrongly refocusing at x ∈ X if there is a point y ≠ x such that all null-geodesics through y pass...
Continual improvements to clinical breast imaging technologies have led to ever earlier detections and increasingly accurate localizations of female breast cancers. While these advancements have certainly improved the prognoses of many patients,...
Information retrieval -- Mathematical models. ; Electronic information resource searching. ; Computer algorithms. ; Decision making -- Data processing. ; Mathematical optimization.
This thesis presents a unified method for simultaneous solution of three problems in Information Retrieval--metasearch (the fusion of ranked lists returned by retrieval systems to elicit improved performance), efficient system evaluation (the...
Friction severely limits performance in precise positioning systems. This thesis investigates one possible approach to counter friction related performance losses, friction cancellation. In this method a friction observer is used to estimate...
Two-phase flow -- Mathematical models. ; Gas dynamics -- Mathematical models. ; Kinetic theory of gases.
The kinetic theory based gas-dynamical computational method, due to (Prendergast and Xu, 1993: Xu and Prendergast, 1994) is generalized to two-phase flow computations. The Bhatnagar-Gross-Krook kinetic model is generalized to the case of two...
Pseudomonas aeruginosa is one of the model organisms used to study the developmental process of biofilm formation in Gram-negative bacteria. Recently, a genetic approach {O'Toole, 1998 #404} was taken to study biofilm formation in P. aeruginosa and...
Human behavior -- Mathematical models. ; Web usage mining. ; Internet users.
Whom we e-mail, where we browse, what we purchase, and the things we search for on the World Wide Web all leave identifiable traces of who we are as individuals. In today's technology focused landscape, cyberspace represents the new environment in...
Topological graph theory. Aperiodicity. Paths and cycles (Graph theory)
The condition ""every cycle has an entry"" first appeared in the literature in Kumjian, Pask, and Raeburn's paper on Cuntz-Krieger algebras of directed graphs, where it was called Condition (L). It provides a necessary condition for simplicity of...
Many retinal degenerative diseases result in blindness. The causes and clinical progression of these diseases are heterogeneous in nature. In many instances the genes involved are known, yet the molecular mechanisms leading to blindness still...
Loss of vascular smooth muscle cell function is a hallmark of vascular disease. Vascular smooth muscle cells become increasingly resistant to phenotypic modulation, apoptotic and senescent. Sirtuin 1 (SirT1) is a deactylase that regulates...
Candida albicans is a fungal species that naturally exists as a commensal member of the human microbiota, but can assume a pathogenic lifestyle and subsequently induce life-threatening systemic infections. The ability of the fungus to grow in...
Boundary integral methods have long been used to solve boundary value problems for elliptic partial differential equations with piecewise constant coefficients, since they have several numerical advantages over conventional volume discretization....
Networks that model relationships in the real world have attracted much attention in the past few years. The "link prediction problem" plays a central role in the network area. In this thesis, we explore the link prediction problem in a...
The heterochronic gene lin-14 affects certain somatic cell-fate choices during post-embryonic development in C. elegans. In lin-14 mutants, cells express stage-specific developmental programs, such as cell divisions or dauer entry, at inappropriate...
RUNX1 is a transcription factor regulating hematopoietic development. Study of the RUNX1 structure revealed two functional domains. The runt domain binds DNA and mediates interaction with CBFß. Sequences C terminal to the runt domain form the...
The present work examines the cognitive structure of the self-concept. Improving upon established measures of self-complexity (H -statistic), cognitive complexity of the self-concept is measured in terms of the number of self-aspects and the...
Rufous-crowned sparrow -- Effect of habitat modification on. ; Rufous-crowned sparrow -- California Southern. ; Fragmented landscapes -- California.
The Rufous-crowned Sparrow (Aimophila ruficeps ; RCSP) is a non-migratory, ground-nesting songbird that resides in southern California coastal sage scrub, which has been highly fragmented by urban development. RCSP's spatial pattern of abundance...
Coding theory. Characters of groups. Error-correcting codes (Information theory). Polynomials.
We introduce vector-valued character theory, a higher dimensional generalization of character theory. We then use vector-valued characters to extend the MacWilliams equivalence theorem for linear codes to a class of additive codes, called...
For a local field K, we study the affine buildings Ξ n and Δ n naturally associated to SL n ( K ) and Sp n ( K ), respectively. Since Sp n ( K ) is a subgroup of SL 2 n ( K ), we investigate properties of a natural embedding of Δ n in Ξ 2 n ....
One of the important challenges facing image-guided neurosurgery is the fact that the brain deforms significantly over the course of an operation during open-cranial procedures. This results in a loss of registration between the brain and the...
Results from a new apparatus that records high resolution FTIR spectra in parahydrogen under 3 K are reported. A modified two-stage closed cycle refrigeration system cools a novel chamber into which gaseous helium can be condensed. The sample...
This thesis considers the two special sensor networks for future sensor network design: mobile sensor networks and hybrid network of sensors and robots. To investigate two types of networks, we abstract two most important aspects that are ingrained...
We expect wireless body-area networks of pervasive wearable devices will enable in situ health monitoring, personal assistance, entertainment personalization, and home automation. As these devices become ubiquitous, we also expect them to...