Physical Sciences and Mathematics Commons^™

Transforming Self-Rated Health And The Sf-36 Scales To Include Death And Improve Interpretability, Paula Diehr

Paula Diehr

BACKGROUND: Most measures of health-related quality of life are undefined for people who die. Longitudinal analyses are often limited to a healthier cohort (survivors) that cannot be identified prospectively, and that may have had little change in health. OBJECTIVE: To develop and evaluate methods to transform a single self-rated health item (excellent to poor; EVGGFP) and the physical component score of the SF-36 (PCS) to new variables that include a defensible value for death. METHODS: Using longitudinal data from two large studies of older adults, health variables were transformed to the probability of being healthy in the future, conditional on …

Relativistic Effects On Interchannel Coupling In Atomic Photoionization: The Photoelectron Angular Distribution Of Xe, Oliver Hemmers, S. T. Manson, M. M. Sant'anna, P. Focke, H. Wang, I. A. Sellin, Dennis W. Lindle

Environmental Studies Faculty Publications

Measurements of the photoelectron angular-distribution asymmetry parameter β for Xe 5s photoionization have been performed in the 80–200 eV photon-energy region. The results show a substantial deviation from the nonrelativistic value of β=2 and provide a clear signature of significant relativistic effects in interchannel coupling.

Canadian Cooperative Wildlife Health Centre, Volume 8-1, Summer 2001

Canadian Cooperative Wildlife Health Centre: Newsletters and Publications

Raptor Carcasses Needed for Assessment of Lead Exposure: CWS and CCWHC cooperative project
Radio-telemetry for Detecting and Understanding Disease
Update on West Nile Virus in North America
French heartworm in red fox and domestic dogs in Newfoundland
Raccoon Rabies Reaches New Brunswick
Neurological Disease in Moose in Nova Scotia
Brain Abscesses in White-tailed Deer
Suspected predation by ravens on nesting painted turtles
Marine Mammals in British Columbia
Chronic Wasting Disease in free-ranging mule-deer in Saskatchewan

Web Spoofing 2001, Yougu Yuan, Eileen Zishuang Ye, Sean Smith Dartmouth College

Computer Science Technical Reports

The Web is currently the pre-eminent medium for electronic service delivery to remote users. As a consequence, authentication of servers is more important than ever. Even sophisticated users base their decision whether or not to trust a site on browser cues---such as location bar information, SSL icons, SSL warnings, certificate information, response time, etc. In their seminal work on web spoofing, Felten et al showed how a malicious server could forge some of these cues---but using approaches that are no longer reproducible. However, subsequent evolution of Web tools has not only patched security holes---it has also added new technology to …

Santa Clara Magazine, Volume 43 Number 1, Summer 2001, Santa Clara University

Santa Clara Magazine

2 - 150TH ANNIVERSARY MEMORIES In honor of SCU's sesquicentennial year, alumni reflect on their Bronco experiences.

4 - "SHEN FU" LEARNED THE GRACE OF ANGER By Tennant Wright, S.J. A friend shares his memories of Philip Oliger, S.J., who taught him that "passion is the sign that we are alive."

14 - WINGING IT By Adam Breen. Professor Bill Stover is a volunteer pilot for The Flying Doctors, a humanitarian group that brings free basic health and dental care to underprivileged communities in Mexico.

18 - SAVING GRACE By Elizabeth Kelly Gillogly '93. Santa Clara University's 150 years come …

Characterization Of Near-Surface Traps In Semiconductors: Gan, David C. Look, Z-Q. Fang

Physics Faculty Publications

We present a simple a criterion, based on deep-level transient spectroscopy peak heights S(V_r) at two or more values of reverse bias V_r, to unequivocally determine whether or not a particular semiconductor trap is of bulk or near-surface nature. Moreover, we present an expression for S(V_r) with fitting parameters ϕ_B, the Schottky barrier height; δ, the trap penetration depth; and N_T, the trap density. Application of the method to a thick, high-quality, epitaxial GaN layer, reveals two common traps which penetrate only 2700±300 Å into the …

Semantic Operators And Fixed-Point Theory In Logic Programming, Anthony K. Seda, Pascal Hitzler

Computer Science and Engineering Faculty Publications

We consider rather general operators mapping valuations to (sets of) valuations in the context of the semantics of logic programming languages. This notion generalizes several of the standard operators encountered in this subject and is inspired by earlier work of M.C. Fitting. The fixed points of such operators play a fundamental role in logic programming semantics by providing standard models of logic programs and also in determining the computability properties of these standard models. We discuss some of our recent work employing topological ideas, in conjunction with order theory, to establish methods by which one can find the fixed points …

Proposed Model Storm Water Ordinance For Kent County Townships And Municipalities, Annis Water Resources Institute

Environmental Guidebooks and Model Ordinances

AN ORDINANCE to provide for the regulation and control of storm water runoff; to provide for storm water permits and the procedures and standards for the issuance thereof; to provide for payment or reimbursement of costs and expenses incurred by the Township/Municipality associated with storm water permits and the consideration thereof; to establish standards and requirements for the protection of floodways and for the control of soil erosion and sedimentation; to adopt other provisions for the establishing, maintaining and protection of drains and drainageways; to provide regulations for the inspection, sampling and monitoring of storm water and other discharges; to …

Intrasteric Inhibition Of Atp Binding Is Not Required To Prevent Unregulated Autophosphorylation Or Signaling By The Insulin Receptor, Mark Frankel, Ararat J. Ablooglu, Joseph W. Leone, Elena Rusinova, J. B. A. Ross, Robert L. Heinrikson, Ronald A. Kohanski

Chemistry and Biochemistry Faculty Publications

Receptor tyrosine kinases may use intrasteric inhibition to suppress autophosphorylation prior to growth factor stimulation. To test this hypothesis we made an Asp1161Ala mutant in the activation loop that relieved intrasteric inhibition of the unphosphorylated insulin receptor (IR) and its recombinant cytoplasmic kinase domain (IRKD) without affecting the activated state. Solution studies with the unphosphorylated mutant IRKD demonstrated conformational changes and greater catalytic efficiency from a 10-fold increase in kcat and a 15-fold-lower K_{m ATP} although K_{m peptide} was unchanged. Kinetic parameters of the autophosphorylated mutant and wild-type kinase domains were virtually identical. The Asp1161Ala mutation increased the …

Anatomy Of A Community-Level Fiscal Impact Model: Fit-4-Nh., Tracey L. Farrigan, John M. Halstead, Martin L. Shields, Douglas E. Morris, Edmund F. Jansen Jr

Natural Resources & the Environment

Abstract: This paper describes the development of a fiscal impact tool for New Hampshire communities (HT -4-NH). FIT -4-NH belongs to a family of computergenerated fiscal impact assessment models designed to estimate the impacts to local government revenues and expenditures that result from economic changes. In the past, work in this area has centered on the completion of countylevel models for the midwestern states. FIT-4-NH is unique in that it was designed for rural community-level use in the northern New England region of the country.

Moving Icons, Detection And Distraction, Lyn Bartram, Colin Ware, Tom Calvert

Center for Coastal and Ocean Mapping

Simple motion has great potential for visually encoding information but there are as yet few experimentally validated guidelines for its use. Two studies were carried out to look at how efficiently simple motion cues were detected and how distracting they were in different task contexts. The results show that motion outperforms static representations and identify certain types of motions which are more distracting and irritating than others.

On Circulant Best Matrices And Their Applications, S. Georgiou, C. Koukouvinos, Jennifer Seberry

Faculty of Informatics - Papers (Archive)

Call four type 1(1,-1) matrices, x₁,x₂,x₃,x₄; of the same group of order m (odd) with the properties (i) (X_i-I)^T = -(X_i-I), i=1,2,3, (ii)X^T₄ = X₄ and the diagonal elements are positive, (iii) X_iX_j = X_jX_i and (iv) X₁X^T₁ + X₂X^T₂+X₃X^T₃ +X₄X^T₄ = 4mI_m, best matrices. We use a computer to give, for the first time, all inequivalent best matrices …

Seagrass Species - Are They Spectrally Distinct?, S. K. Fyfe, A. G. Dekker

Faculty of Science - Papers (Archive)

The spectral reflectance of 3 species of seagrass was measured in different habitats at 3 estuaries in southeastern Australia during each of the 4 seasons of 2000. Seagrass species were spectrally distinct regardless of whether the leaves were fouled by epibionts even though spatial and temporal variability in reflectance was observed within each species. The visible wavelengths that penetrate water fortunately coincide with the regions of maximum absorption by plant photosynthetic and accessory pigments. Mapping of benthic plants to species level is possible using a hyperspectral sensor that has narrow bands centred on pigment-related spectral features in the visible, e.g. …

Morphological And Physiological Effects Of Mechanical Trauma To The Spinal Cord, Steven Teoh, Yinlong Sun

Department of Computer Science Technical Reports

No abstract provided.

Cost Optimal Record/Entity Matching, V. S. Verykios, Ahmed K. Elmagarmid, G. V. Moustakides

Department of Computer Science Technical Reports

No abstract provided.

Query Indexing And Velocity Constrained Indexing: Scalable Techniques For Continuous Queries On Moving Objects, Sunil Prabhakar, Y. Xia, D. Kalashnikov, Walid G. Aref, Susanne E. Hambrusch

Department of Computer Science Technical Reports

No abstract provided.

Record Matching: Past, Present And Future, M. Cochinwala, S. Dalal, Ahmed K. Elmagarmid, V. S. Verykios

Department of Computer Science Technical Reports

No abstract provided.

Scwds Briefs: Volume 17, Number 2 (July 2001)

Southeastern Cooperative Wildlife Disease Study: Publications

• West Nile virus (WNV) recently was detected in wild birds found dead in Florida and Georgia.
• The cause of avian vacuolar myelinopathy (AVM) remains undetermined despite extensive diagnostic and research investigations conducted since the disease was first recognized as a significant cause of eagle mortality in 1994.
• The spread of foot-and-mouth disease (FMD) that began in the United Kingdom in February 2001 has slowed dramatically.
• A test of the animal disease emergency management system was conducted July 9-12, 2001, by the U.S. Department of Agriculture's Animal and Plant Health Inspection Service (APHIS) and the states of …

Responses Of Three Coral Communities To The 1997–98 El Niño–Southern Oscillation: Galápagos Islands, Ecuador, Joshua S. Feingold

Marine & Environmental Sciences Faculty Articles

One deep (13–15 m depth) and two shallow water (1.5 and 7 m) coral communities in the Galápagos Islands, Ecuador were monitored for tissue response (bleaching, paling, morbidity) and secondary responses during and after elevated temperature stress associated with the 1997–98 El Niño–Southern Oscillation (ENSO) event. Between March and May 1998, the fungiid coral Diaseris distorta paled and bleached (up to 88.0% of all individuals bleached) at 13–15 m depth. The small branching colonial coral, Psammocora stellata, paled (79.2% of all colonies) with very little bleaching (11.1%), also at 13–15 m depth. However, by May 1998 colonies of this …

Broadcasting Indexed Multidimensional Data, Susanne E. Hambrusch, Chuan-Ming Liu, Walid G. Aref, Sunil Prabhakar

Department of Computer Science Technical Reports

No abstract provided.

Local Polariton Modes And Resonant Tunneling Of Electromagnetic Waves Through Periodic Bragg Multiple Quantum Well Structures, Lev I. Deych, Alexey Yamilov, Alexander A. Lisyansky

Physics Faculty Research & Creative Works

We study analytically defect polariton states in Bragg multiple quantum well structures and defect-induced changes in transmission and reflection spectra. Defect layers can differ from the host layers in three ways: exciton-light coupling strength, exciton resonance frequency, and interwell spacing. We show that a single defect leads to two local polariton modes in the photonic band gap. These modes cause peculiarities in reflection and transmission spectra. Each type of defect can be reproduced experimentally, and we show that each of these plays a distinct role in the optical properties of the system. For some defects, we predict a narrow transmission …

A Theoretical Study Of The Effects Of Insulators On Electron Transport Through Electrostatic Tube Lenses, T. G. Anderson, B. G. Birdsey, S. M. Woeher, Mark A. Rosenberry, Timothy J. Gay

Timothy J. Gay Publications

Using the computer program SIMION 6, we have studied the effects of spurious insulator charging on the trajectories of electrons through electrostatic tube lenses. We considered lens elements with flat ends, spaced a distance g apart, whose inner diameter D=10g. For the standard cases of drift tubes, two-element lenses, and einzel lenses, we found that charging effects are eliminated if t/g>3.5, where t is the distance between the lens inner diameter and the charged spacing insulator.

Statistical Inference For Simultaneous Clustering Of Gene Expression Data, Katherine S. Pollard, Mark J. Van Der Laan

U.C. Berkeley Division of Biostatistics Working Paper Series

Current methods for analysis of gene expression data are mostly based on clustering and classification of either genes or samples. We offer support for the idea that more complex patterns can be identified in the data if genes and samples are considered simultaneously. We formalize the approach and propose a statistical framework for two-way clustering. A simultaneous clustering parameter is defined as a function of the true data generating distribution, and an estimate is obtained by applying this function to the empirical distribution. We illustrate that a wide range of clustering procedures, including generalized hierarchical methods, can be defined as …

Mitochondrial Gene Rearrangements Confirm The Parallel Evolution Of The Crab-Like Form, C. L. Morrison, A. W. Harvey, S. Lavery, K. Tieu, Y. Huang, C. W. Cunningham

VIMS Articles

The repeated appearance of strikingly similar crab-like forms in independent decapod crustacean lineages represents a remarkable case of parallel evolution. Uncertainty surrounding the phylogenetic relationships among crab-like lineages has hampered evolutionary studies. As is often the case, aligned DNA sequences by themselves were unable to fully resolve these relationships. Four nested mitochondrial gene rearrangements—including one of the few reported movements of an arthropod protein-coding gene—are congruent with the DNA phylogeny and help to resolve a crucial node. A phylogenetic analysis of DNA sequences, and gene rearrangements, supported five independent origins of the crab-like form, and suggests that the evolution of …

High-Temperature Magnetic Properties Of Mechanically Alloyed Smco 5 And Yco5 Magnets, I.A. Al-Omari, Ralph Skomski, R.A. Thomas, D. Leslie-Pelecky, David J. Sellmyer

David Sellmyer Publications

The high-temperature coercivity of mechanically alloyed and subsequently annealed RCo₅ (R=Sm and Y) is studied. The annealed materials have the hexagonal CaCu₅ structure with 2 : 17 (or 1 : 7) regions as a minor phase. High-temperature magnetic measurements showthat the coercivities of materials decrease with increasing temperature fromroom-temperature to 873 K, but that the temperature coefficient of the coercivity of YCo₅ is much smaller than that of SmCo₅. This behavior is explained in terms of the intrinsic temperature variation of the magnetocrystalline anisotropy.

Coercivity Of Titanium-Substituted High-Temperature Permanent Magnets, Jian Zhou, Ralph Skomski, David J. Sellmyer

David Sellmyer Publications

The temperature dependence of the coercivity of Sm–Co based magnets is investigated by magnetization measurements and model calculations. The Zr-free titanium-substituted Sm–Co material exhibits a positive temperature coefficient dH_{c/dT of the coercivity (TCC) above room temperature, a reasonable hysteresis-loop shape, and an appreciable coercivity of 12.3 kOe at 500 C for the nominal composition Sm(Co6.2Cu0.8Ti0.3). The samples were produced by heat-treating the disordered 1 : 5 alloy commonly referred to as the TbCu7 (or 1 : 7) phase. X-ray diffraction analysis shows that, upon annealing at 1165 C, …}

Grain-Boundary Micromagnetism, Ralph Skomski, H. Zeng, David J. Sellmyer

David Sellmyer Publications

Continuum and layer-resolved calculations are used to investigate the spin structure in the vicinity of grain boundaries. Reduced exchange in the grain-boundary region gives rise to a quasidiscontinuity of the magnetization and yields a perturbation which decays exponentially inside the grains. An effective intergranular exchange is obtained as a micromagnetically well-defined function of the grain-boundary exchange, and it is discussed how grain boundaries affect the hysteresis loops of nanostructures.

A New Approach To Understanding Canid Populations Using An Individual-Based Computer Model: Preliminary Results, William C. Pitt, Frederick F. Knowlton, Paul W. Box

United States Department of Agriculture Wildlife Services: Staff Publications

Ensuring the welfare of wild canid populations depends upon the ability to integrate species biology, the environmental aspects upon which those populations depend, and the factors controlling species abundance. Toward this end, we developed an individual-based computer model using Swarm to mimic natural coyote populations. Swarm is a software platform that allows the user to describe individual behaviors for all individuals, link those behaviors in each concurrent time step, and assemble behaviors and objects in a hierarchical framework. Our model stands apart from previous modeling efforts because it relies on field data and explicitly incorporates behavioral features, such as dominance …

Aspects Of Minimality In Abelian Groups, Seosamh Ó Hógáin

Doctoral

This thesis investigates those abelian groups which are minimal with respect to certain quasi-orders defined on Abk, the category of abelian groups of a given infinite cardinality k. Six such quasi-orders are defined and groups which are minimal with respect to these quasi-orders are called either quasi-minimal, with the associated concepts of purely and directly quasi-minimal groups, or simple minimal with the corresponding associated groups. A complete characterisation is derived for the quasi-minimal groups and, assuming GCH, for the purely quasi-minimal groups. Moreover, it is shown that the direct quasi-minimality of a group may be undecidable in ZFC. In the …

The Probe, Issue 217 – July/August 2001

The Probe: Newsletter of the National Animal Damage Control Association

NADCA's Future Mission -- Art Smith, NADCA Treasurer, editor INTERACTIONS
The Wildlife Society Position Statement on Feral and Free-Ranging Domestic Cats
Feral Dog Trapping Primer -- Dave Pauli, Humane Society of the United States
The first case of hantavirus pulmonary syndrome (HPS), a rodent-borne viral infection, known to occur in New England has recently been confirmed.
NWRC Research Program Manager Announced: Dr. James Russell Mason is the new Program Manager for the Center's Mammal Research Program.
What causes albino individuals to occur and does this condition occur within all vertebrate species?
ORV'S (off-Road Vehicles) May Exacerbate Hantavirus Infection

Wildlife and …