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High-Speed Adaptive Interferometer For Optical Coherence-Domain Reflectometry Through Turbid Media, L. Peng, P. Yu, D. D. Nolte, M. R. Melloch Jan 2003

High-Speed Adaptive Interferometer For Optical Coherence-Domain Reflectometry Through Turbid Media, L. Peng, P. Yu, D. D. Nolte, M. R. Melloch

Department of Physics and Astronomy Faculty Publications

Two-wave mixing in a dynamic holographic film acts as the adaptive beam combiner in a short-coherence interferometer that performs optical coherence-domain reflectometry (OCDR) through turbid media. This approach combines the high spatial resolution and sensitivity of coherence-domain reflectometry with photorefractive quantum-well-based adaptive homodyne detection. A depth resolution of 28 p,m and penetration through 16 mean free paths in a turbid medium have been obtained in this adaptive OCDR application. (C) 2003 Optical Society of America.

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Holographic Optical Coherence Imaging Of Tumor Spheroids, P. Yu, M. Mustata, J. J. Turek, P. M. W. French, M. R. Melloch, D. D. Nolte Jan 2003

Holographic Optical Coherence Imaging Of Tumor Spheroids, P. Yu, M. Mustata, J. J. Turek, P. M. W. French, M. R. Melloch, D. D. Nolte

Department of Physics and Astronomy Faculty Publications

We present depth-resolved coherence-domain images of living tissue using a dynamic holographic semiconductor film. An AlGaAs photorefractive quantum-well device is used in an adaptive interferometer that records coherent backscattered (image-bearing) light from inside rat osteogenic sarcoma tumor spheroids up to 1 mm in diameter in vitro. The data consist of sequential holographic image frames at successive depths through the tumor represented as a visual video "fly-through." The images from the tumor spheroids reveal heterogeneous structures presumably caused by necrosis and microcalcifications characteristic of human tumors in their early avascular growth. (C) 2003 American Institute of Physics.

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High-Speed Wide-Field Coherence-Gated Imaging Via Photorefractive Holography With Photorefractive Multiple Quantum Well Devices, C. Dunsby, D. Mayorga-Cruz, I. Munro, Y. Gu, P. M. W. French, D. D. Nolte, M. R. Melloch Jan 2003

High-Speed Wide-Field Coherence-Gated Imaging Via Photorefractive Holography With Photorefractive Multiple Quantum Well Devices, C. Dunsby, D. Mayorga-Cruz, I. Munro, Y. Gu, P. M. W. French, D. D. Nolte, M. R. Melloch

Department of Physics and Astronomy Faculty Publications

The parallel pixel acquisition inherent in wide-field coherence-gated imaging techniques offers the possibility of high-frame-rate imaging and volumetric imaging, including through scattering media. We discuss photorefractive holography using sensitive, dynamic photorefractive multiple quantum well (PRQW) films as a promising approach and, after reviewing the factors that determine the sensitivity of this technique, we demonstrate that high-frame-rate wide-field coherence gated imaging is possible at 830 frames per second with PRQW devices using a non-intensified camera to record the diffracted signal.

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High-Speed Depth-Sectioned Wide-Field Imaging Using Low-Coherence Photorefractive Holographic Microscopy, C. Dunsby, Y. Gu, Z. Ansari, P. M. W. French, L. Peng, P. Yu, M. R. Melloch, D. D. Nolte Jan 2003

High-Speed Depth-Sectioned Wide-Field Imaging Using Low-Coherence Photorefractive Holographic Microscopy, C. Dunsby, Y. Gu, Z. Ansari, P. M. W. French, L. Peng, P. Yu, M. R. Melloch, D. D. Nolte

Department of Physics and Astronomy Faculty Publications

Low-coherence photorefractive holography has the potential to acquire wide-field coherence-gated images at frame rates approaching 1000 frames/s, including through scattering media. We present a quantitative analysis of the system optimization and limits of performance for coherence-gated imaging through scattering media using photorefractive holography and compare this performance to direct CCD detection. We show that, for high optical quality recording photorefractive multiple quantum well devices, photorefractive holography has the potential to provide a higher dynamic range than is possible with direct CCD-based detection. (C) 2003 Elsevier Science B.V. All rights reserved.

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Structure And Diffusion Time Scales Of Disordered Clusters, E. Cuansing, H. Nakanishi Jan 2003

Structure And Diffusion Time Scales Of Disordered Clusters, E. Cuansing, H. Nakanishi

Department of Physics and Astronomy Faculty Publications

The eigenvalue spectra of the transition probability matrix for random walks traversing critically disordered clusters in three different types of percolation problems show that the random walker sees a developing Euclidean signature for short time scales as the local, full-coordination constraint is iteratively applied. (C) 2002 Elsevier Science B.V. All rights reserved.

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A General Framework For Nonlinear Multigrid Inversion, Seungseok Oh, Adam B. Milstein, Charles A. Bouman, Kevin J. Webb Jan 2003

A General Framework For Nonlinear Multigrid Inversion, Seungseok Oh, Adam B. Milstein, Charles A. Bouman, Kevin J. Webb

Department of Electrical and Computer Engineering Technical Reports

A variety of new imaging modalities, such as optical diffusion tomography, require the inversion of a forward problem that is modeled by the solution to a 3-D partial differential equation. For these applications, image reconstruction is particularly difficult because the forward problem is both nonlinear and computationally expensive to evaluate. In this paper, we propose a general framework for nonlinear multigrid inversion that is applicable to a wide variety of inverse problems. The multigrid inversion algorithm results from the application of recursive multigrid techniques to the solution of optimization problems arising from inverse problems. The method works by dynamically adjusting …

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Ultrasound Detection Through Turbid Media, P. Yu, L. Peng, D. D. Nolte, M. R. Melloch Jan 2003

Ultrasound Detection Through Turbid Media, P. Yu, L. Peng, D. D. Nolte, M. R. Melloch

Department of Physics and Astronomy Faculty Publications

Optical coherence-domain reflectometry and laser-based ultrasound detection have been combined with the use of adaptive optics to detect ultrasound through turbid media. The dynamic hologram in a photorefractive quantum-well device performs as a coherence gate that eliminates multiply scattered background. Quadrature homodyne detection conditions are selected by the choice of center wavelength of the pulse spectrum, requiring no active stabilization or feedback. A depth resolution of 30 mum was achieved, with a pulse duration of nominally 120 fs for ultrasound detection through turbid media up to optical thicknesses of 11 mean free scattering lengths. (C) 2003 Optical Society of America.

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On Query Processing And Optimality Using Spectral Locality-Preserving Mappings, Mohamed F. Mokbel, Walid G. Aref Jan 2003

On Query Processing And Optimality Using Spectral Locality-Preserving Mappings, Mohamed F. Mokbel, Walid G. Aref

Department of Computer Science Technical Reports

No abstract provided.

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From The Editors, Neal Lerner, Elizabeth Boquet Jan 2003

From The Editors, Neal Lerner, Elizabeth Boquet

The Writing Center Journal

No abstract provided.

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Planning For Hypertexts In The Writing Center … Or Not, Michael A. Pemberton Jan 2003

Planning For Hypertexts In The Writing Center … Or Not, Michael A. Pemberton

The Writing Center Journal

No abstract provided.

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Information For The Authors Jan 2003

Information For The Authors

The Writing Center Journal

No abstract provided.

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Law, Media And Political Dissent: The Case Of The Faln, Yanira Reyes Dec 2002

Law, Media And Political Dissent: The Case Of The Faln, Yanira Reyes

Open Access Dissertations

Inspired on the works of scholars and activists that had denounced state repression of political activists in the United States, this research explores the theoretical proposal about the criminalization of political dissidence. The proposal of the criminalization of political dissidence is analyzed through the study of the case of Puerto Rican pro-independence organization Fuerzas Armadas de Liberaci6n Nacional, F.A.L.N. The subjects of this research were charged with seditious conspiracy and other charges. They claimed the status of prisoners of war and deny the jurisdiction of US courts over them. Affirming their right to fight for the independence of Puerto Rico, …

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Specialty Tomato Variety Observation Trial For Indiana, 2002, Elizabeth Maynard Dec 2002

Specialty Tomato Variety Observation Trial For Indiana, 2002, Elizabeth Maynard

Midwest Vegetable Trial Reports

The trial reported here is an extension of the specialty tomato trials conducted in Indiana in 2001. In that trial, 16 varieties were grown in replicated trials in two locations to evaluate their performance and suitability for the restaurant salad market. In this trial, the same 16 varieties plus an additional 17 varieties were grown in unreplicated plots for evaluation of yield and culinary quality.

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Specialty Tomato Variety Observation Trial For Indiana, 2002, Elizabeth Maynard Dec 2002

Specialty Tomato Variety Observation Trial For Indiana, 2002, Elizabeth Maynard

Purdue Fruit and Vegetable Research Reports

The trial reported here is an extension of the specialty tomato trials conducted in Indiana in 2001. In that trial, 16 varieties were grown in replicated trials in two locations to evaluate their performance and suitability for the restaurant salad market. In this trial, the same 16 varieties plus an additional 17 varieties were grown in unreplicated plots for evaluation of yield and culinary quality.

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Liksom's Short Story "We Got Married" And (Finnish) Identity Construction, Kimmo Jokinen Dec 2002

Liksom's Short Story "We Got Married" And (Finnish) Identity Construction, Kimmo Jokinen

CLCWeb: Comparative Literature and Culture

In his paper, "Liksom's Short Story 'We Got Married' and (Finnish) Identity Construction," Kimmo Jokinen proposes the validity of common belief today that a shift into a late-modern era is taking place. It has often been claimed in contemporary sociological debates that our "post-industrial" life has become more thoroughly imbricated with culture and signs and sociologists, in their analyses of contemporary life, are interested especially in stories people tell, hear, and read. Based on readers' survey data in Finland, Jokinen analyses the ways in which Rosa Liksom's short story "We Got Married" is being employed in identity construction. For Jokinen, …

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Performance Of Multi-Dimensional Space- Filling Curves, Mohamed F. Mokbel, Walid G. Aref, Ibrahim Kamel Dec 2002

Performance Of Multi-Dimensional Space- Filling Curves, Mohamed F. Mokbel, Walid G. Aref, Ibrahim Kamel

Department of Computer Science Technical Reports

No abstract provided.

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Reading Liksom's Short Story "We Got Married" In Post-Communist Bulgaria, Kornelia Slavova Dec 2002

Reading Liksom's Short Story "We Got Married" In Post-Communist Bulgaria, Kornelia Slavova

CLCWeb: Comparative Literature and Culture

Kornelia Slavova, in her paper "Reading Liksom's Short Story 'We Got Married' in Post-communist Bulgaria," discusses the intricate interrelations of texts and social practices in postcommunist Bulgaria by analysing Rosa Liksom's short story read by sixty readers. Further, Slavova proposes the study of the uses of stereotypes in fiction and their discursive hardening in extratextual practices at times of radical political and cultural change. With this notion, she focuses on two major stereotypical patterns concerning gender and the supranational opposition East/West. Slavova argues that the latter function as palimpsest structures on which earlier bipolar representations from the communist Cold-War era …

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Reading Liksom's Short Story "We Got Married" In Post-Communist Estonia, Malle Järve Dec 2002

Reading Liksom's Short Story "We Got Married" In Post-Communist Estonia, Malle Järve

CLCWeb: Comparative Literature and Culture

In her paper, "Reading Liksom's Short Story 'We Got Married' in Post-communist Estonia," Malle Järve discusses the reception of Rosa Liksom's text in post-communist Estonia. After gaining independence, Estonians became exposed to varieties of literature including avant-garde texts which did not fit easily with the expectations and rules of interpretation developed during Soviet rule. Based on data collected in 1993 and 1998, Järve focuses on the cultural repertoire (discourses, stereotypes, values, literary expectations, etc.) used by readers while constructing meaning to the text, perceived predominantly as foreign/Other. Järve's objective is an attempt to explain: 1) who/what the Other in the …

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Cultural Studies And Cultural Text Analysis, Urpo Kovala Dec 2002

Cultural Studies And Cultural Text Analysis, Urpo Kovala

CLCWeb: Comparative Literature and Culture

In his article, "Cultural Studies and Cultural Text Analysis," Urpo Kovala discusses the role of textual analysis in cultural studies. He begins with a sketch of different conceptions of textual analysis within cultural studies by pointing to differences in the concepts of text and context themselves. Next, Kovala explores the reasons for including textual analysis as a category and method in cultural studies and in humanities and social sciences scholarship generally. Finally, Kovala sketches briefly a model for the cultural analysis of text where his main point is that the argument about the incompatibility of cultural studies and textual analysis …

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Introduction To Cultural Text Analysis And Liksom's Short Story "We Got Married", Urpo Kovala Dec 2002

Introduction To Cultural Text Analysis And Liksom's Short Story "We Got Married", Urpo Kovala

CLCWeb: Comparative Literature and Culture

No abstract provided.

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Selected Bibliography Of Textual Analysis In Cultural Studies, Xianfeng Mou, Urpo Kovala Dec 2002

Selected Bibliography Of Textual Analysis In Cultural Studies, Xianfeng Mou, Urpo Kovala

CLCWeb: Comparative Literature and Culture

No abstract provided.

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Liksom's Short Stories And The Ironies Of Contemporary Existence, Chris Pawling Dec 2002

Liksom's Short Stories And The Ironies Of Contemporary Existence, Chris Pawling

CLCWeb: Comparative Literature and Culture

In his paper, "Liksom's Short Stories and the Ironies of Contemporary Existence," Chris Pawling examines Rosa Liksom's short stories in her volume One Night Stands. Pawling proposes that Liksom's texts can be understood as postmodern pastiches (Jameson) of different literary voices which in turn are couched in an "affect-less" prose that attempt to inhabit the mental universe of the narrator/protagonist without necessarily endorsing any aesthetic or ethical point of view. Liksom's fictional universe is populated by individuals who are alienated from the life of predictable routines and are searching for "action" in scenes of low life in late-night city bars. …

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Exploiting The Synergy Between Peer-To-Peer And Mobile Ad Hoc Networks, Y. Charlie Hu, Saumitra M. Das, Himabindu Pucha Nov 2002

Exploiting The Synergy Between Peer-To-Peer And Mobile Ad Hoc Networks, Y. Charlie Hu, Saumitra M. Das, Himabindu Pucha

Department of Electrical and Computer Engineering Technical Reports

We argue that there exists a synergy between peer-to-peer (p2p) overlay networks for the Internet and mobile ad hoc networks (MANET) connecting mobile nodes communicating with each other via multi-hop wireless links { both share the key characteristics of self- organization and decentralization, and both need to solve the same fundamental problem, that is, how to provide connectivity in a completely decentralized environment. We propose Dynamic P2P Source Routing (DPSR), a new routing protocol for MANETs that exploits the synergy between P2P and MANET for increased scalability. By integrating DSR and a topology-aware structured P2P overlay routing protocol, DPSR limits …

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Surviving The Era Of Digital Media, Edward Colleran Nov 2002

Surviving The Era Of Digital Media, Edward Colleran

Against the Grain

No abstract provided.

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Comparative Literature In An Age Of "Globalization", Lois Parkinson Zamora Sep 2002

Comparative Literature In An Age Of "Globalization", Lois Parkinson Zamora

CLCWeb: Comparative Literature and Culture

Lois Parkinson Zamora, in her paper "Comparative Literature in an Age of 'Globalization'," presents a definition of globalization and considers how its cultural and spatial displacements have, and might, change traditional disciplinary practices of comparative literature. Zamora discusses how contemporary Latin American writers dramatize and evaluate the forces of globalization in their fiction and she exemplifies her observations with texts by Carpentier, Borges, Paz, Fuentes, Puig, García Márquez, and Vargas Llosa. Further, the author proposes that the cultural specificity of fictions by contemporary Latin American writers may serve as an antidote to current processes of cultural homogenization.

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Performance Study On Two Distance Vector Routing Protocols For Mobile Ad Hoc Networks, Yi Lu, Weichao Wang, Yuhui Zhong, Bharat Bhargava Jul 2002

Performance Study On Two Distance Vector Routing Protocols For Mobile Ad Hoc Networks, Yi Lu, Weichao Wang, Yuhui Zhong, Bharat Bhargava

Department of Computer Science Technical Reports

No abstract provided.

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Towards A Map Of The Current Critical Debate About Latin American Cultural Studies, Julio Ortega Jun 2002

Towards A Map Of The Current Critical Debate About Latin American Cultural Studies, Julio Ortega

CLCWeb: Comparative Literature and Culture

In his paper, "Towards a Map of the Current Critical Debate about Latin American Cultural Studies," Julio Ortega surveys the shifting disciplinary, critical, and methodological paradigms used to study Latin American culture in both the United States and Latin America. Describing the post-theoretical period as a moment when grand analytical models are abandoned in favor of microanalyses, Ortega sees great potential in this new paradigm shift. In his paper, Ortega pays particular attention to the ways that the field of cultural studies has emerged and transformed in Latin American academic inquiry and he considers the disavowal of master critical models …

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Quality Of Service Provisioning For Composable Routing Elements, Seung Chul Han, Puneet Zaroo, David K.Y. Yau, Prem Gopalam, John C. S. Lui Jun 2002

Quality Of Service Provisioning For Composable Routing Elements, Seung Chul Han, Puneet Zaroo, David K.Y. Yau, Prem Gopalam, John C. S. Lui

Department of Computer Science Technical Reports

No abstract provided.

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A Case For Multi-Key Secure Video Proxy: Theory, Design And Implementation, Siu F. Yeung, John C.S. Lui, David K.Y. Yau Jun 2002

A Case For Multi-Key Secure Video Proxy: Theory, Design And Implementation, Siu F. Yeung, John C.S. Lui, David K.Y. Yau

Department of Computer Science Technical Reports

No abstract provided.

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Comparative Literature And Latin American Studies: From Disarticulation To Dialogue, Sophia A. Mcclennen Jun 2002

Comparative Literature And Latin American Studies: From Disarticulation To Dialogue, Sophia A. Mcclennen

CLCWeb: Comparative Literature and Culture

In her paper, "Comparative Literature and Latin American Studies: From Disarticulation to Dialogue," Sophia A. McClennen surveys the profound changes that characterize Latin American cultural studies today. McClennen reads these changes in light of recent transformations in the fields of comparative literature and cultural studies and suggests that scholars in these fields are now in a position to embark on productive dialogue and exchange. Before such interaction takes place, however, McClennen cautions, we should recall why there has historically been little intellectual exchange between comparatists and scholars of Latin American literature. Barriers to exchange between these areas have been: The …

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