Digital Commons Network^™

Gender Differences In The Relative Age Effect Among Us Olympic Development Program Youth Soccer Players, John Vincent, Francis D. Glamser

Faculty Publications

A large body of research has shown that a disproportionate number of elite youth male soccer players competing in age-segmented competition are born early in the selection year. The advantage of being born early in a cohort has been termed the "relative age effect''. Although there has been an exponential growth in women's soccer, few studies have examined the relative age effect in female youth soccer. This study compared the relative age effect of 1344 female and male youth soccer players considered by the US Olympic Development Program (ODP), in 2001, to be the most talented soccer players born in …

Homogeneous Products Of Conjugacy Classes, Edith Adan-Bante

Faculty Publications

Let G be a finite group and a ∈G. Let a ^G ={g ⁻¹ a g | g ∈ G} be the conjugacy class of a in G. Assume that a ^G and b ^G are conjugacy classes of G with the property that C _G (a)=C _G (b). Then a ^G b ^G is a conjugacy class if and only if [a,G]=[b,G]=[ab,G] and [ab,G] is a normal subgroup of G.

The Structure Of Β-Carbonic Anhydrase From The Carboxysomal Shell Reveals A Distinct Subclass With One Active Site For The Price Of Two, Michael R. Sawaya, Gordon C. Cannon, Sabine Heinhorst, Shiho Tanaka, Eric B. Williams, Todd O. Yeates, Cheryl A. Kerfeld

Faculty Publications

CsoSCA (formerly CsoS3) is a bacterial carbonic anhydrase localized in the shell of a cellular microcompartment called the carboxysome, where it converts HCO^-₃ to CO₂ for use in carbon fixation by ribulose-bisphosphate carboxylase/oxygenase (RuBisCO). CsoSCA lacks significant sequence similarity to any of the four known classes of carbonic anhydrase (α, β, γ, or δ), and so it was initially classified as belonging to a new class, ϵ. The crystal structure of CsoSCA from Halothiobacillus neapolitanus reveals that it is actually a representative member of a new subclass of β-carbonic anhydrases, distinguished by a lack of active site …

Cytochrome P4501a Is Induced In Endothelial Cell Lines From The Kidney And Lung Of The Bottlenose Dolphin, Tursiops Truncatus, Rita Anne Garrick, Bruce R. Woodin, Joanna Y. Wilson, Bobby L. Middlebrooks, John J. Stegman

Faculty Publications

Marine mammals respond to the presence of polycyclic and planar halogenated aromatic hydrocarbons (PAH or PHAH) with the induced expression in endothelium of cytochrome P4501A1, regulated through the aryl hydrocarbon receptor (AHR) transcription factor. Physiological responses in other animals, such as edema and inflammation indicate that the endothelium may be compromised by exposure to AHR agonists, which are ubiquitous in the marine environment. In other mammals and fish the cellular and molecular consequences of exposure to AHR agonists have been elucidated in cultured endothelial cells. We have cultured and characterized cetacean endothelial cells (EC) and used them in induction studies. …

Zonal Patterns Of Delta C-13, Delta N-15 And Po-210 In The Tropical And Subtropical North Pacific, Min Chen, Laodong Guo, Qiang Ma, Yusheng Qiu, Run Zhang, E Lv, Yipu Huang

Faculty Publications

Nitrogen fixation process may supply a significant fraction of bioavailable nitrogen to surface waters, increase the oceanic sequestration of atmospheric CO2, and alter the distribution of geochemical parameters. We report a zonal pattern of delta N-15 and delta C-13 in particulate organic matter (POM), and ratios of particulate Po-210 to dissolved Po-210 along a transect through the subtropical and tropical North Pacific. Both N-15 and Po-210 signals indicated an enhanced N-2 fixation in the northwestern subtropical North Pacific. The eastward decrease of N-2 fixation along this transect testified the role of aeolian Fe and P in controlling marine N-2 fixation. …

William Faulkner's Southern Knights: 'Sir Gawain And The Green Knight', Sir Galwyn Of Arthgyl, And Gavin Stevens, Lorie Watkins Fulton

Faculty Publications

No abstract provided.

Satellite Ocean Color Assessment Of Air-Sea Fluxes Of Co2 In A River-Dominated Coastal Margin, Steven E. Lohrenz, Wei-Jun Cai

Faculty Publications

Quantification of the contributions of river-influenced margins to regional CO2 fluxes is difficult due to the high degree of spatial and temporal variability in these regions. We describe an algorithm for assessment of surface water partial pressure of CO2 (pCO(2)) from MODIS imagery in the northern Gulf of Mexico. Principal component analysis and multiple regression were used to relate surface pCO(2) to environmental variables (T, S, chlorophyll). Subsequent retrieval of corresponding products from MODIS-Aqua L1B data permitted the assessment of regional distributions of pCO(2). An area of low pCO(2) was evident in the vicinity of the Mississippi River delta, consistent …

Identification Of New Members Of Hydrophobin Family Using Primary Structure Analysis, Kuan Yang, Youping Deng, Chaoyang Zhang, Mohamed O. Elasri

Faculty Publications

Background

Hydrophobins are fungal proteins that can turn into amphipathic membranes at hydrophilic/hydrophobic interfaces by self-assembly. The assemblages by Class I hydrophobins are extremely stable and possess the remarkable ability to change the polarity of the surface. One of its most important industrial applications is its usage as paint. Without detailed knowledge of the 3D structure and self-assembly principles of hydrophobins, it is difficult to make significant progress in furthering its research.

Results

In order to provide useful information to hydrophobin researchers, we analyzed primary structure of hydrophobins to gain more insight about these proteins. In this paper, we presented …

An Empirical Investigation Of The Minority Interest And Marketability Discounts In Valuation Of Closely Held Stock For Estate And Gift Tax Purposes, Ted D. Englebrecht, Mary M. Anderson, Otto Martinson

Faculty Publications

The discounts for lack of marketability and minority interest are crucial in reducing the value of transferred interests of closely held companies for estate and gift tax purposes. Because the current highest marginal estate and gift tax rate is 49%, there is a strong inducement for CPAs, Attorneys, Investment Bankers, Financial Planners, and others who value these transfers to accurately gauge the judicially allowed discounts for lack of marketability and minority interests in the valuation of closely held stock. This study examines the relationship between Tax Court determined values for lack of marketability and minority discounts to closely held stock …

Nomenclatural Innovations In Neotropical Salicaeeae, Mac H. Alford

Faculty Publications

Macrothumia M. H. Alford is described as a new genus of Salicaceae based on Neosprucea kuhlmannii Steamer from Brazil. The deciduous perianth, papillate leaf teeth, presence of receptacular disk glands, and analyses of plastid DNA data Suggest that the new genus is more closely related to Ahernia Merrill and Pleuranthodendron. L. O. Williams than to Banara Aublet or Neosprucea Sleuruer. The monotypic genus Aphaerema Miers of Brazil and Argentina is transferred to Abatia Ruiz & Pavon, based on analyses of plastid DNA sequences and on the lack of morphological discontinuities between the genera. Because the name Abatia spicata (Turczaninow) …

Parallelization Of Multicategory Support Vector Machines (Pmc- Svm) For Classifying Microarray Data, Chaoyang Zhang, Peng Li, Arun Rajendran, Youping Deng, Dequan Chen

Faculty Publications

Background: Multicategory Support Vector Machines (MC-SVM) are powerful classification systems with excellent performance in a variety of data classification problems. Since the process of generating models in traditional multicategory support vector machines for large datasets is very computationally intensive, there is a need to improve the performance using high performance computing techniques.

Results: In this paper, Parallel Multicategory Support Vector Machines (PMC-SVM) have been developed based on the sequential minimum optimization-type decomposition method for support vector machines (SMO-SVM). It was implemented in parallel using MPI and C++ libraries and executed on both shared memory supercomputer and Linux cluster …

Maldi-Tof Baseline Drift Removal Using Stochastic Bernstein Approximation, Joseph Kolibal, Daniel Howard

Faculty Publications

Stochastic Bernstein (SB) approximation can tackle the problem of baseline drift correction of instrumentation data. This is demonstrated for spectral data: matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF) data. Two SB schemes for removing the baseline drift are presented: iterative and direct. Following an explanation of the origin of the MALDI-TOF baseline drift that sheds light on the inherent difficulty of its removal by chemical means, SB baseline drift removal is illustrated for both proteomics and genomics MALDI-TOF data sets. SB is an elegant signal processing method to obtain a numerically straightforward baseline shift removal method as it includes a …

Baseline Mapping Of Phragmites Australis (Common Reed) In Three Coastal Mississippi Estuarine Basins, Mark S. Peterson, Melissa L. Partyka

Faculty Publications

Over the last two decades, the northern Gulf of Mexico has undergone tremendous growth and development that has resulted in extensive and ongoing habitat modification. We had the opportunity to survey the main channels and bayous of three coastal estuarine basins for the presence and coverage of the invasive Phragmites australis (common reed). The occurrence and area of P. australis was highly variable among the lower Pascagoula River, Back Bay of Biloxi, and St. Louis Bay basins, with the largest amount of coverage (0.489 km(2)) found within the lower Pascagoula River basin and the smallest in Back Bay of Biloxi …

Taxometric Investigation Of Ptsd: Data From Two Nationally Representative Samples, Joshua J. Broman-Fulks, Kenneth J. Ruggiero, Bradley A. Green, Dean G. Kilpatrick, Carla Kmett Danielson, Heidi S. Resnick, Benjamin E. Saunders

Faculty Publications

Current psychiatric nosology depicts posttraumatic stress disorder (PTSD) as a discrete diagnostic category. However, only one study has examined the latent structure of PTSD, and this study suggested that PTSD may be more accurately conceptualized as an extreme reaction to traumatic life events rather than a discrete clinical syndrome. To build on the existing literature base, the present research examined the latent structure of posttraumatic stress reactions by applying three taxometric procedures (MAXEIG, MAMBAC, and L-Mode) to data collected from large nationally representative samples of women (ns = 2684 and 3033) and adolescents (n = 3775). Results …