Digital Commons Network^™

Performance Analysis Of Common Detectors For Shaped Offset Qpsk And Feher's Qpsk, Tom Nelson, Michael D. Rice, Erik Perrins

Faculty Publications

Sponsorship: US Air Force Grant FA9302-05-C-0001. A detector architecture capable of detecting both shaped offset quadrature phase shift keying (SOQPSK-TG) and Feher's quadrature phase shift keying (FQPSK-JR) is developed and analyzed. Both modulations are embodied as fully interoperable modulations in the Interrange Instrumentation Group (IRIG) standard IRIG-106. It is shown that the common detector achieves near optimal bit error rate performance without knowledge of which modulation is used by the transmitter. The detection techniques are based on a common trellis-coded modulation representation and a common continuous phase modulation (CPM) representation for these two modulations. In addition the common pulse amplitude …

Open Access Federation For Library And Information Science, Anita Coleman, Joseph Roback

Faculty Publications

Self-archiving, the practice of depositing one's works in an OAI-compliant archive, is a key strategy for innovating scholarly communication and achieving open access. DL-Harvest, a subject service for Library and Information (LIS), based on the aggregation of OAI-PMH compliant metadata from both institutional and disciplinary digital repositories, including dLIST, is described. Additionally, results from two studies that explored LIS journal publishers' stances towards self-archiving as expressed in copyright transfer agreements (CTAs) and the scholarly communication behaviors of LIS scholars, with regard to self-archiving and searching, are presented and some implications for the development of federated subject services are highlighted.

Spectra Of High-Redshift Type Ia Supernovae And A Comparison With Their Low-Redshift Counterparts, I. M. Hook, D. A. Howell, G. Aldering, R. Amanullah, M. S. Burns, A. Conley, S. E. Deustua, R. Ellis, S. Fabbro, V. Fadeyev, G. Folatelli, G. Garavini, R. Gibbons, G. Goldhaber, A. Goobar, D. E. Groom, A. G. Kim, R. A. Knop, M. Kowalski, C. Lidman, S. Nobili, P. E. Nugent, R. Pain, C. R. Pennypacker, S. Perlmutter, P. Ruiz-Lapuente, G. Sainton, B. E. Schaefer, E. Smith, A. L. Spadafora, V. Stanishev, R. C. Thomas, N. A. Walton

Faculty Publications

We present spectra for 14 high-redshift (0.17 < z < 0.83) supernovae, which were discovered by the Supernova Cosmology Project as part of a campaign to measure cosmological parameters. The spectra are used to determine the redshift and classify the supernova type, essential information if the supernova are to be used for cosmological studies. Redshifts were derived either from the spectrum of the host galaxy or from the spectrum of the supernova itself. We present evidence that these supernovae are of Type Ia (SNe Ia) by matching to spectra of nearby supernovae. We find that the dates of the spectra relative to maximum light determined from this fitting process are consistent with the dates determined from the photometric light curves, and, moreover, the spectral time sequences for SNe Ia at low and high redshift are indistinguishable. We also show that the expansion velocities measured from blueshifted Ca H and K are consistent with those measured for low-redshift SNe Ia. From these first-level quantitative comparisons we find no evidence for evolution in SN Ia properties between these low- and high-redshift samples. Thus, even though our samples may not be complete, we conclude that there is a population of SNe Ia at high redshift whose spectral properties match those at low redshift. © 2005. The American Astronomical Society. All rights reserved.

An Analysis Of Seawinds-Based Rain Retrieval In Severe Weather Events, David G. Long, Jeffrey R. Allen

Faculty Publications

The Ku-band SeaWinds scatterometer estimates near-surface ocean wind vectors by relating measured backscatter to a geophysical model function for the near-surface vector wind. The conventional wind retrieval algorithm does not explicitly account for SeaWinds' sensitivity to rain, resulting in rain-caused wind retrieval error. A new retrieval method, termed "simultaneous wind/rain retrieval," that estimates both wind and rain from rain-contaminated measurements has been previously proposed and validated with Tropical Rain Measuring Mission data. Here, the accuracy of rains retrieved by the new method is validated through comparison with the Next Generation Weather Radar (NEXRAD) in coastal storm events. The rains detected …

More Than Fun And Games: Reconsidering The Virtues Of Strategic Management Simulations, Ken E. Zantow, Dave S. Knowlton, David C. Sharp

Faculty Publications

We look at the relationship between business simulations and the educational theory of generative learning using the framework developed by Wittrock (1974, 1990, 1992). Our findings reveal opportunities for generative learning that occur at all phases of the simulation process. Awareness of these opportunities prepares faculty to get the most from the strategic decision-making simulations. and may assist them in defining the contribution associated with their use. We suggest areas for additional research.

Are Specific Language Impairment And Dyslexia Distinct Disorders?, Hugh W. Catts, Suzanne M. Adlof, Tiffany Hogan, Susan Ellis Weismer

Faculty Publications

Purpose - The purpose of this study was to determine whether specific language impairment (SLI) and dyslexia are distinct developmental disorders.

Method - Study 1 investigated the overlap between SLI identified in kindergarten and dyslexia identified in 2nd, 4th, or 8th grades in a representative sample of 527 children. Study 2 examined phonological processing in a subsample of participants, including 21 children with dyslexia only, and 43 children with SLI only, 18 children with SLI and dyslexia, and 165 children with typical language/reading development. Measures of phonological awareness and nonword repetition were considered.

Results - Study 1 showed limited but …

Modeling Microwave Emissions Of Erg Surfaces In The Sahara Desert, David G. Long, Haroon Stephen

Faculty Publications

Sand seas (ergs) of the Sahara are the most dynamic parts of the desert. Aeolian erosion, transportation, and deposition continue to reshape the surface of the ergs. The large-scale features (dunes) of these bedforms reflect the characteristics of the sand and the long-term wind. Radiometric emissions from the ergs have strong dependence on the surface geometry. We model the erg surface as composed of tilted rough facets. Each facet is characterized by a tilt distribution dependent upon the surface roughness of the facet. The radiometric temperature (Tb) of ergs is then the weighted sum of the Tb from all the …

Synergies Sparked: A Research Agenda For Practicing Professionals, Anita Coleman

Faculty Publications

This is a presentation (of 50 slides) at the University of California, Irvine sponsored by the Libraries' Department of Education and Outreach and by the LAUC-I (Librarians Association of the University of California, Irvine) Professional Development Committee. The title is picking up on the 2005 ASIS&T Annual Conference theme of Sparking Synergies: Bringing Research and Practice Together. Coleman discusses her research agenda which spans both sides of the information coin - she tries to examine representations of information and information usage in a unified program of inquiry. The research goal is to expand and integrate knowledge about uses and users …

Development And Validation Of The Theistic Spiritual Outcome Survey, P. Scott Richards, Timothy B. Smith, Marion Schowalter, Michael E. Berrett, Randy K. Hardman

Faculty Publications

We developed the Spiritual Outcome Scale (SOS) to measure the spiritual outcomes of psychotherapy from a theistic spiritual perspective. A 17-item version of the SOS was found to have adequate reliability and validity in a sample of college students. Three factors emerged from the analyses that corresponded to subscales labeled Love of God, Love of Others, and Love of Self. Correlations with measures of psychological outcomes were statistically significant. In subsequent analyses, the SOS was administered over an 8-week period to a sample of inpatient women with eating disorders and to two samples from inpatient psychological clinics in Germany. The …

Dlist, Anita Coleman

Faculty Publications

This is a presentation at the ASIS&T 2005 Annual Meeting session on Progress in the Design and Evaluation of Digital Libraries: Implications for Research and Education (moderator: Kyung-Sun Kim). The presentation discusses the creation, design, and management of dLIST, an open access archive for the Information Sciences, and the affiliated DL-Harvest, an open access aggregator and federated search engine. As an Eprints-based open access archive, dLIST is a digital repository but it is a cross-institutional and interdisciplinary repository built on the concept of "sustainable information behaviors." Elements such as openness, transparency, information quality and interoperability are critical components along with …

Multiple Bromodomain Genes Are Involved In Restricting The Spread Of Heterochromatic Silencing At The Saccharomyces Cerevisiae Hmr-Trna Boundary, Nithya Jambunathan, Adam W. Martinez, Elizabeth C. Robert, Nneamaka B. Agochukwu, Megan E. Ibos, Sandra L. Dugas, David Donze

Faculty Publications

The transfer RNA gene downstream from the HMR locus in S. cerevisiae functions as part of a boundary (barrier) element that restricts the spread of heterochromatic gene silencing into the downstream region of chromosome III. A genetic screen for identifying additional genes that, when mutated, allow inappropriate spreading of silencing from HMR through the tRNA gene was performed. YTA7, a gene containing bromodomain and ATPase homologies, was identified multiple times. Previously, others had shown that the bromodomain protein Bdf1p functions to restrict silencing at yeast euchromatin- heterochromatin boundaries; therefore we deleted nonessential bromodomain-containing genes to test their effects on heterochromatin …

Successful Island Reintroductions Of New Zealand Robins And Saddlebacks With Small Numbers Of Founders, Sabrina S. Taylor, Ian G. Jamieson, Doug P. Armstrong

Faculty Publications

Populations established with a small number of founders are thought to have a high risk of extinction due to Allee effects, demographic stochasticity, inbreeding and reduced genetic variation. We tested whether the initial number of birds released was related to persistence in reintroductions of saddlebacks (Philesturnus carunculatus) and robins (Petroica australis) to New Zealand offshore islands. Data were analysed for 31 populations that had been observed for at least 3 years since reintroductions. The numbers released ranged from 5-188. Most of the populations (26) survived and grew, including five from less than 15 founders, and four out of the five …

A Context-Sensitive Structural Heuristic For Guided Search Model Checking, Eric G. Mercer, Neha Rungta

Faculty Publications

Software verification using model checking often translates programs into corresponding transition systems that model the program behavior. As software systems continue to grow in complexity and size, exhaustively checking a property on a transition graph becomes difficult. The goal of guided search heuristics in model checking is to find a counterexample to the property being verified as quickly as possible in the transition graph. The FSM distance heuristic builds an interprocedural control flow graph of the program to estimate distance to a possible error state. It ignores calling context and underestimates the true distance to the error.

Nursing Education And Service Collaboration: Making A Difference In The Clinical Learning Environment, Sheri P. Palmer, Amy Harmer Cox, Lynn Clark Callister, Vickie Johnsen, Geraldine Matsumura

Faculty Publications

This article focuses on innovative collaborative steps that were identified in recent research conducted by these authors on the relationship between academia and service. These steps are currently being implemented in the hope of improving the important role that the critical environment plays in student nurses' education. Few factors in nursing education are as important as the clinical environment in which students do their training. This article elaborates on these steps and offers practical suggestions for improving the relationship between academia and service.

Asynchronous Ds-Ss Cdma Random Spreading Code Correlation Statistics In The Presence Of Timing Error, David W. Matolak

Faculty Publications

We quantify the effect of timing tracking errors upon 2nd order correlation statistics of random binary spreading codes and, in so doing, fill a gap in the literature. Using a Gaussian model for timing tracking error, new expressions for autocorrelation statistics are derived. For crosscorrelations, we show that a zero mean Gaussian timing error has no effect upon 2nd order crosscorrelation statistics.

Social Utility Functions-Part Ii: Applications, Wynn C. Stirling, Richard L. Frost

Faculty Publications

Social utilities account for agent preferences and, thus, can characterize complex interrelationships, such as cooperation, compromise, negotiation, and altruism, that can exist between agents. Satisficing game theory, which is based on social utilities, offers a framework within which to design sophisticated multiagent systems. Key features of this approach are: a) an N-agent system may be represented by a 2N-dimensional Bayesian network, called a praxeic network; b) the theory accommodates a notion of situational altruism (a willingness to defer to others in a controlled way if so doing would actually benefit others under the condition that others wish to take advantage …

Economic Globalization And Civil War, Katherine Barbieri, Rafael Reuveny

Faculty Publications

No abstract provided.

Terahertz Studies Of The Dielectric Response And Second-Order Phonons In A Gase Crystal, B. L. Yu, F. Zeng, V. Kartazayev, R. R. Alfano, K. C. Mandal

Faculty Publications

No abstract provided.

Exploiting The Quantum Zeno Effect To Beat Photon Loss In Linear Optical Quantum Information Processors, Federico M. Spedalieri, Hwang Lee, Marian Florescu, Kishore T. Kapale, Ulvi Yurtsever, Jonathan P. Dowling

Faculty Publications

We devise a new technique to enhance transmission of quantum information through linear optical quantum information processors. The idea is based on applying the Quantum Zeno effect to the process of photon absorption. By frequently monitoring the presence of the photon through a quantum non-demolition (QND) measurement the absorption is suppressed. Quantum information is encoded in the polarization degrees of freedom and is therefore not affected by the measurement. Some implementations of the QND measurement are proposed. © 2005 Elsevier B.V. All rights reserved.

Semiconductor Nanowire Laser And Nanowire Waveguide Electro-Optic Modulators, Andrew B. Greytak, Carl J. Barrelet, Yat Li, Charles M. Lieber

Faculty Publications

Electric field modulation of visible and ultraviolet nanoscale lasers consisting of single CdS or GaN nanowires has been achieved using integrated, microfabricated electrodes. Modulation of laser emission intensity is achieved with no detectable change in the laser wavelength. The devices can also be operated below the lasing threshold to modulate the intensity of light propagating within the nanowire waveguide. Studies of the electric field dependence in devices of varied geometry indicate that modulation is due to an electroabsorption mechanism. These findings expand opportunities for multicolor, nanowire-based photonic devices and circuits.

Some Reflections On The Symposium: Judging, The Classical Legal Paradigm And The Possible Contributions Of Science, Christina E. Wells

Faculty Publications

One theme running through the many excellent contributions to this symposium involves the myriad influences on judicial decision-making. As Professor Wrightsman notes, Supreme Court Justices' personal characteristics may affect their ability to influence colleagues and, consequently, the outcome of Supreme Court decisions. Professor Ruger observes that judges have both attitudinal and jurisprudential preferences that may change over time, affecting legal outcomes differently as time passes. Professor Sisk similarly notes that judges' personal values and experiences influence their decision-making. These observations are consistent with those of numerous other scholars, who find wide-ranging and diverse influences on the judicial resolution of legal …

Revelations From The Blackmun Papers On The Development Of Death Penalty Law , Martha Dragich

Faculty Publications

Professor Dragich uses the Blackmun papers to augment our understanding of Justice Blackmun's "evolution" on the question of capital punishment. Though the evolution was gradual, she finds that the case of Warren McCleskey seems to have deeply affected Justice Blackmun.

The Aba/Aals Sabbatical Site Inspection: Strangers In A Strange Land, R. Lawrence Dessem

Faculty Publications

At some point in their deanships, most law school deans will host a sabbatical site inspection of their law school by the American Bar Association (ABA) and the Association of American Law Schools (AALS). Virtually all deans also will have the opportunity to serve as a representative of the ABA or AALS on a team inspecting another law school. In this article I will discuss these site visits from the dean's perspective.

Inspiration And Science, Jo Ann Davidson

Faculty Publications

No abstract provided.

Descriptive Adequacy Vs. Psychological Reality: The Case Of Two Restrictions On Spanish Stress Placement, Scott M. Alvord, Timothy L. Face

Faculty Publications

This paper examines two supposed restrictions on Spanish stress placement: 1) the heavy penult condition, which prohibits stress leftward of the penultimate syllable if the penultimate syllable is heavy, and 2) the three-syllable window condition, which prohibits stress other than on one of the final three syllables of a word. While these two conditions are clearly descriptively adequate generalizations about the lexicon, this study sets out to determine whether they are psychologically real restrictions, serving as constraints that prohibit words that violate them. The results of a perception study indicate that neither of these conditions is a psychologically real restriction …

Recruitment And Retention Of Emergency Medical Technicians: A Qualitative Study, P. Daniel Patterson, Janice C. Probst, Katherine H. Leith, Sara J. Corwin, M. Paige Powell

Faculty Publications

Emergency medical technicians (EMTs) are critical to out-of-hospital care, but maintaining staff can be difficult. The study objective was to identify factors that contribute to recruitment and retention of EMTs and paramedics. Information was drawn from three focus groups of EMT-Basic, EMT-Intermediate, and EMT-Paramedic personnel recruited from participants at an annual conference. Thoughts and feelings of EMTs and paramedics were investigated using eight questions designed to explore entry into emergency medical services, what it is like to be an EMT or paramedic, and the EMT educational process. Data were analyzed at the group level for common themes using NVivo. For …

Through The Eyes Of A Teacher Andrea Luxton’S Worldview, Beverly Matiko

Faculty Publications

No abstract provided.

Collaboration, Anita Coleman

Faculty Publications

This is a presentation (15) slides at the 2005 ASIS&T Annual Meeting, Charlotte, N.C. on October 31, session on Collaboration in Digital Libraries: Luminous Ideas from Health Informatics, Academic Libraries, and Historical Archives 

Acoustic And Spectral Characteristics Of Young Children’S Fricative Productions: A Developmental Perspective, Shawn L. Nissen, Robert Allen Fox

Faculty Publications

Scientists have made great strides toward understanding the mechanisms of speech production and perception. However, the complex relationships between the acoustic structures of speech and the resulting psychological percepts have yet to be fully and adequately explained, especially in speech produced by younger children. Thus, this study examined the acoustic structure of voiceless fricatives /f, s, b/ produced by adults and typically developing children from 3 to 6 years of age in terms of multiple acoustic parameters durations, normalized amplitude, spectral slope, and spectral moments. It was found that the acoustic parameters of spectral slope and variance commonly excluded from …

Book Ownership And Authorial Identity: Reconstructing The (Im)Personal Library Of Arthur Hugh Clough, Patrick G. Scott

Faculty Publications

Describes the different evidence that survives for the personal libraries owned by two Victorian poets, Alfred Tennyson and Arthur Hugh Clough, and discusses the ways in which such book-ownership is (and is not) usable as evidence about the author's thought and writing. This paper was originally presented at the North American Victorian Studies Association Conference, Charlottesville, VA, October 1, 2005.