David M. Smith

The ACTIVE cognitive training trial and predicted medical expenditures (2009)

Wolinsky, Fredric D, Mahncke, Henry W, Kosinski, Mark, Unverzagt, Frederick W, Smith, David M, Jones, Richard N, ...

Abstract Background Health care expenditures for older adults are disproportionately high and increasing at both the individual and population levels. We evaluated the effects of the three cognitive...

IGR J17544-2619 in depth with Suzaku: direct evidence for clumpy winds in a supergiant fast X-ray transient (2009)

Rampy, Rachel A., Smith, David M., Negueruela, Ignacio

We present the first direct evidence for dense clumps of matter in the companion wind in a Supergiant Fast X-ray Transient (SFXT) binary. This is seen as a brief period of enhanced absorption during...

Temporal Variations of Strength and Location of the South Atlantic Anomaly as Measured by RXTE (2009)

Fürst, Felix, Wilms, Jörn, Rothschild, Richard E., Pottschmidt, Katja, Smith, David M., Lingenfelter, Richard

The evolution of the particle background at an altitude of ~540 km during the time interval between 1996 and 2007 is studied using the particle monitor of the High Energy X-ray Timing Experiment on...

Final year School Projects: The Bristol ChemLabS Use of the Undergraduate Ambassador Scheme (2009)

Timothy G. Harrison, David M. Smith, Dudley E. Shallcross

As part of the final year of their undergraduate degree programmes, some chemistry students at the University of Bristol spend time in local primary or secondary schools working on chemistry or...

Using Multiple-Precision Arithmetic (2008)

David M. Smith

There are many different kinds of problems for which high precision calculation can be useful. The most common situation involves a computation that is numerically unstable, so that using double...

Supergiant Fast X-ray Transients and Other Wind Accretors (2008)

Negueruela, Ignacio, Torrejon, Jose Miguel, Reig, Pablo, Ribo, Marc, Smith, David M.

Supergiant Fast X-ray Transients are obviously related to persistent Supergiant X-ray Binaries. Any convincing explanation for their behaviour must consistently take into account all types of X-ray...

RHESSI Spectral Fits of Swift GRBs (2008)

Bellm, Eric C., Bandstra, Mark E., Boggs, Steven E., Hajdas, Wojtek, Hurley, Kevin, Smith, David M., ...

One of the challenges of the Swift era has been accurately determining Epeak for the prompt GRB emission. RHESSI, which is sensitive from 30 keV to 17 MeV, can extend spectral coverage above the...

A brief introduction to Oswald: Object Oriented Software for the Analysis of Longitudinal Data (2007)

David M. Smith

Many general statistical packages now contain facilities for the analysis of longitudinal data. However, these facilities are typically limited in scope and do not exploit the particular character of...

[Mathematics of Computing]: Mathematical Software-- Algorithm analysis, e#ciency, (2007)

David M. Smith

A collection of Fortran-90 routines for evaluating the Gamma function and related functions using the FM multiple-precision arithmetic package. Categories and Subject Descriptors: G.1.0 [Numerical...

Hysteresis of spectral evolution in the soft state of black-hole binary LMC X-3 (2007)

Smith, David M., Dawson, David M., Swank, Jean H.

We report the discovery of hysteresis between the x-ray spectrum and luminosity of black-hole binary LMC X-3. Our observations, with the Proportional Counter Array on the Rossi X-ray Timing Explorer,...

Supergiant Fast X-ray Transients: A common behaviour or a class of objects? (2007)

Negueruela, Ignacio, Smith, David M., Torrejon, Jose Miguel, Reig, Pablo

INTEGRAL monitoring of the Galactic Plane is revealing a growing number of recurrent X-ray transients, characterised by short outbursts with very fast rise times (~ tens of minutes) and typical...

Hippocampal place cells, context, and episodic memory (2006)

David M. Smith

ABSTRACT: Although most observers agree that the hippocampus has a critical role in learning and memory, there remains considerable debate about the precise functional contribution of the hippocampus...

Modeling the dependence between the number of trials and the success probability in binary trials (2005)

Faddy, Malcolm J., Smith, David M.

A model for binary trials based on a bivariate generalization of the Poisson process for both the number of successes and number of trials with the transition rates dependent on the accumulating...

Modeling the dependence between the number of trials and the success probability in binary trials (2005)

Faddy, Malcolm J., Smith, David M.

A model for binary trials based on a bivariate generalization of the Poisson process for both the number of successes and number of trials with the transition rates dependent on the accumulating...

Modeling the dependence between the number of trials and the success probability in binary trials (2005)

Faddy, Malcolm J., Smith, David M.

A model for binary trials based on a bivariate generalization of the Poisson process for both the number of successes and number of trials with the transition rates dependent on the accumulating...

Supergiant Fast X-ray Transients: A new class of high mass X-ray binaries unveiled by INTEGRAL (2005)

Negueruela, Ignacio, Smith, David M., Reig, Pablo, Chaty, Sylvain, Torrejon, Jose Miguel

INTEGRAL monitoring of the Galactic Plane is revealing a growing number of recurrent X-ray transients, characterised by short outbursts with very fast rise times (~ tens of minutes) and typical...

The optical counterpart to the peculiar X-ray transient XTE J1739-302 (2005)

Negueruela, Ignacio, Smith, David M., Harrison, Thomas E., Torrejon, Jose Miguel

The weak X-ray transient XTE J1739-302, characterized by extremely short outbursts, has recently been identified with a reddened star. Here we present spectroscopy and photometry of the counterpart,...

Modeling the dependence between the number of trials and the success probability in binary trials (2005)

Faddy, Malcolm J., Smith, David M.

A model for binary trials based on a bivariate generalization of the Poisson process for both the number of successes and number of trials with the transition rates dependent on the accumulating...

Modeling the dependence between the number of trials and the success probability in binary trials (2005)

Faddy, Malcolm J., Smith, David M.

A model for binary trials based on a bivariate generalization of the Poisson process for both the number of successes and number of trials with the transition rates dependent on the accumulating...

Modeling the dependence between the number of trials and the success probability in binary trials (2005)

Faddy, Malcolm J., Smith, David M.

A model for binary trials based on a bivariate generalization of the Poisson process for both the number of successes and number of trials with the transition rates dependent on the accumulating...

Modeling the dependence between the number of trials and the success probability in binary trials (2005)

Faddy, Malcolm J., Smith, David M.

A model for binary trials based on a bivariate generalization of the Poisson process for both the number of successes and number of trials with the transition rates dependent on the accumulating...

Modeling the dependence between the number of trials and the success probability in binary trials (2005)

Faddy, Malcolm J., Smith, David M.

A model for binary trials based on a bivariate generalization of the Poisson process for both the number of successes and number of trials with the transition rates dependent on the accumulating...

Modeling the dependence between the number of trials and the success probability in binary trials (2005)

Faddy, Malcolm J., Smith, David M.

A model for binary trials based on a bivariate generalization of the Poisson process for both the number of successes and number of trials with the transition rates dependent on the accumulating...

Gamma-Ray Line Observations with RHESSI (2004)

Smith, David M.

The Reuven Ramaty High Energy Solar Spectroscopic Imager (RHESSI) has been observing gamma-ray lines from the Sun and the Galaxy since its launch in February 2002. Here I summarize the status of...

GX 339-4: the distance, state transitions, hysteresis and spectral correlations (2004)

Zdziarski, Andrzej A., Gierlinski, Marek, Mikolajewska, Joanna, Wardzinski, Grzegorz, Smith, David M., Harmon, B. Alan, ...

We study X-ray and variability and distance of GX 339-4. We derive d>7 kpc, based on recent determination of the binary parameters. We study data from the Ginga/ASM, the CGRO/BATSE, and the RXTE/ASM,...

High-Resolution Spectroscopy of Gamma-Ray Lines from the X-Class Solar Flare of 23 July, 2002 (2003)

Smith, David M., Share, Gerald H., Murphy, Ronald J., Schwartz, Richard A., Shih, Albert Y., Lin, Robert P.

The Reuven Ramaty High Energy Solar Spectroscopy Imager (RHESSI) has obtained the first high-resolution measurements of nuclear de-excitation lines produced by energetic ions accelerated in a solar...

The Reuven Ramaty High Energy Solar Spectroscopic Imager observation of the 1809 keV line from Galactic 26Al (2003)

Smith, David M.

Observations of the central radian of the Galaxy by the Reuven Ramaty High Energy Solar Spectroscopy Imager (RHESSI) have yielded a high-resolution measurement of the 1809 keV line from 26Al,...

Leadership and professional competencies: Serving higher education in an era of change (2000)

Smith, David M

Higher education faced increasing pressures on many fronts during the 1990's. Fiscal problems grew as public funding decreased and students struggled to pay high tuition rates. The demographic...

Peak Shaving and Alternative Power: A Question of Economy, Quality of Life and Quality of Electricity. (1998)

Smith, David M.

The Navy will need to upgrade the utility infrastructure of its installations in the coming years. There are several factors that they will need to take into consideration, to include energy...

Compliance in an anti-hypertension trial: a latent process model for binary longitudinal data. (1998)

Smith, David M., Diggle, Peter J.

We propose an alternative to the method of generalized estimating equations (GEE) for inference about binary longitudinal data. Unlike GEE, the method is practicable when the data consist of long...

Multiple Precision Complex Arithmetic and Functions (1998)

David M. Smith

This paper describes a collection of Fortran routines for multiple precision complex arithmetic and elementary functions. The package provides good exception handling, flexible input and output,...

An evaluation of the development and utilization of visual art written assessments in Indian prairie school district #204 / (1998)

Smith, David M.

"The proposal was to evaluate and develop the visual art assessment at the second and fifth grade levels. This required an understanding and documentation of what had previously been accomplished......

Studies in the labor market for veterinarians / (1997)

Smith, David M.

Thesis (Ph. D.)--Michigan State University. Dept. of Economics, 1997.

A multiple-precision division algorithm (1996)

David M. Smith

Abstract. The classical algorithm for multiple-precision division normalizes digits during each step and sometimes makes correction steps when the initial guess for the quotient digit turns out to be...

A FORTRAN package for floating-point multiple-precision arithmetic (1991)

David M. Smith

FM is a collection of Fortran-77 routines which performs floating-point multiple-precision arithmetic and elementary functions. Results are almost always correctly rounded, and due to improved...

A Fortran Package For Floating-Point Multiple-Precision Arithmetic (1991)

David M. Smith

FM is a collection of Fortran-77 routines which performs floating-point multiple-precision arithmetic and elementary fuctions. Results are almost always correctly rounded, and due to improved...

LONG-TERM HEALTH EFFECTS IN HAMSTERS AND RATS EXPOSED CHRONICALLY TO MAN-MADE VITREOUS FIBRES (1987)

SMITH, DAVID M., ORTIZ, LAWRENCE W., ARCHULETA, RUBEN F., JOHNSON, NEIL F.

As part of a comprehensive inhalation study, groups of Osborne-Mendel rats and Syrian golden hamsters were exposed to several types of airborne man-made vitreous fibres (MMVF). Exposure protocols...

Rates of synthesis of actomyosin in atria and ventricles of the perfused working rat heart (1985)

SMITH, DAVID M, SUGDEN, PETER H

Actomyosin from hearts perfused in vitro with [U-14C] phenylalanine and the remaining plasma amino acids was purified by standard techniques. The rate of actomyosin synthesis was expressed relative...

Stiffness and damping of an inherently compensated gas-lubricated bearing of square geometry. (1973)

Smith, David M.

Thesis (M.S.)--Mississippi State University, 1973. Department of Mechanical Engineering.

Optimal Number of Stock Holdings in Mutual Fund Portfolios Based on Market Performance

Hany A. Shawky, David M. Smith

Among the decisions that most mutual fund portfolio managers make is the number of stocks to hold. We posit that there is an optimal number of stocks for each mutual fund, reflecting the trade-off...

Genetic Factors in Determining Bone Mass

Smith, David M., Nance, Walter E., Kang, Ke Won, Christian, Joe C., Johnston, C. Conrad

This investigation was undertaken to evaluate possible genetic determinants of bone mass with the premise that inheritance of bone mass could be of etiologic importance in osteoporosis.

Firing properties of dopamine neurons in freely moving dopamine-deficient mice: Effects of dopamine receptor activation and anesthesia

Robinson, Siobhan, Smith, David M., Mizumori, Sheri J. Y., Palmiter, Richard D.

To examine the regulation of midbrain dopamine neurons, recordings were obtained from single neurons of freely moving, genetically engineered dopamine-deficient (DD) mice. DD mice were tested without...

Ras Mutation Impairs Epithelial Barrier Function to a Wide Range of Nonelectrolytes

Mullin, James M., Leatherman, James M., Valenzano, Mary Carmen, Huerta, Erika Rendon, Verrechio, Jon, Smith, David M., ...

Although ras mutations have been shown to affect epithelial architecture and polarity, their role in altering tight junctions remains unclear. Transfection of a valine-12 mutated ras construct into...

Genetic Factors in Determining Bone Mass

Smith, David M., Nance, Walter E., Kang, Ke Won, Christian, Joe C., Johnston, C. Conrad

This investigation was undertaken to evaluate possible genetic determinants of bone mass with the premise that inheritance of bone mass could be of etiologic importance in osteoporosis.

Firing properties of dopamine neurons in freely moving dopamine-deficient mice: Effects of dopamine receptor activation and anesthesia

Robinson, Siobhan, Smith, David M., Mizumori, Sheri J. Y., Palmiter, Richard D.

To examine the regulation of midbrain dopamine neurons, recordings were obtained from single neurons of freely moving, genetically engineered dopamine-deficient (DD) mice. DD mice were tested without...

Ras Mutation Impairs Epithelial Barrier Function to a Wide Range of Nonelectrolytes

Mullin, James M., Leatherman, James M., Valenzano, Mary Carmen, Huerta, Erika Rendon, Verrechio, Jon, Smith, David M., ...

Although ras mutations have been shown to affect epithelial architecture and polarity, their role in altering tight junctions remains unclear. Transfection of a valine-12 mutated ras construct into...

Synthetic analogs of green tea polyphenols as proteasome inhibitors.

Smith, David M., Wang, Zhigang, Kazi, Aslamuzzaman, Li, Lian-Hai, Chan, Tak-Hang, Dou, Q. Ping

BACKGROUND: Animal, epidemiological and clinical studies have demonstrated the anti-tumor activity of pharmacological proteasome inhibitors and the cancer-preventive effects of green tea consumption....

Characterization of receptors for calcitonin gene-related peptide and adrenomedullin on the guinea-pig vas deferens

Poyner, David R, Taylor, Gillian M, Tomlinson, A Elaine, Richardson, Alan G, Smith, David M

The receptors which mediate the effects of calcitonin gene-related peptide (CGRP), amylin and adrenomedullin on the guinea-pig vas deferens have been investigated.All three peptides cause...

Characterization and distribution of prolactin releasing peptide (PrRP) binding sites in the rat – evidence for a novel binding site subtype in cardiac and skeletal muscle

Satoh, Fumitoshi, Smith, David M, Gardiner, James V, Mahmoodi, Mehdi, Murphy, Kevin G, Ghatei, Mohammad A, ...

Prolactin releasing peptide (PrRP) was recently purified from bovine hypothalamus and binds to the orphan receptor, UHR-1. We examined the distribution and kinetics of 125I-PrRP binding in rat...

Comparison of the expression of calcitonin receptor-like receptor (CRLR) and receptor activity modifying proteins (RAMPs) with CGRP and adrenomedullin binding in cell lines

Choksi, Tejal, Hay, Debbie L, Legon, Stephen, Poyner, David R, Hagner, Stefanie, Bloom, Stephen R, ...

The calcitonin receptor-like receptor (CRLR) and specific receptor activity modifying proteins (RAMPs) together form receptors for calcitonin gene-related peptide (CGRP) and/or adrenomedullin in...

The role of the 8-18 helix of CGRP8-37 in mediating high affinity binding to CGRP receptors; coulombic and steric interactions

Howitt, Stephen G, Kilk, Kalle, Wang, Yang, Smith, David M, Langel, Ulo, Poyner, David R

The role of individual residues in the 8-18 helix of CGRP8-37 in promoting high-affinity binding to CGRP1 receptors expressed on rat L6 and human SK-N-MC cells has been examined. The relative...

Convertible Debt Issuance and Market Completeness.

Broughton, John B, Smith, David M

Recent empirical evidence on option listings supports the notion that equity options help to span the market. This paper investigates the role of convertible debt in market completion. To the extent...

Pay and productivity differences between male and female veterinarians.

David M. Smith

The author uses data from annual wage surveys conducted in 1994 and 1995 by Medical Economics Research Group to study differences in pay and productivity between male and female veterinarians in the...

Pay and productivity differences between male and female veterinarians.

David M. Smith

The author uses data from annual wage surveys conducted in 1994 and 1995 by Medical Economics Research Group to study differences in pay and productivity between male and female veterinarians in the...

Social justice revisited

David M Smith

The author takes as his point of departure David Harvey's original formulation of territorial social justice and recognises the subsequent emergence of a politics of difference as central to the...

Units of Debt with Warrants: Evidence of the "Penalty-Free" Issuance of an Equity-Like Security

Billingsley, Randall S, Lamy, Robert E, Smith, David M

While units of debt with warrants are not structured as perfect substitutes for convertible bonds, there is reason to believe that firms view the two securities as viable alternative methods of...