Digital Commons Network^™

Perceptual Paths To Accurate Production Of L2 Vowels: The Role Of Individual Differences, Wendy Baker-Smemoe, Pavel Trofimovich

Faculty Publications

This study investigated whether individual differences in learners’ age of arrival (AOA) and length of residence (LOR) in a country where a second language (L2) is spoken determine the relationship between L2 perception and production. In the first experiment, 40 Korean learners of English and 10 native English speakers participated in vowel perception and production tasks in English. Results demonstrated that the relationship between perception and production depended on learners’ AOA, not LOR. In the second experiment, the same Korean learners of English participated in a vowel perception task in which they judged the accuracy of their own production of …

Principles Of U.S. Family Law, Vivian E. Hamilton

Faculty Publications

What explains U.S. family law? What are the origins of the current chaos and controversy in the field, the home of some of the most vituperative debates in public policy? To answer these questions, this Article identifies and examines family law's foundational principles. It undertakes a conceptual analysis of the legal practices that govern families. This analysis has yet to be done, and its absence hamstrings constructive thought on our family law. The Article develops a typology that conceptualizes U.S. family law and exposes its underlying principles. First, it identifies the significant elements, or rules, of family law. Second, it …

New Orleans, The Chesapeake, And The Future Of Environmental Assessment: Overcoming The Natural Resources Law Of Unintended Consequences, Erin Ryan

Faculty Publications

No abstract provided.

Detector Dogs And Probable Cause, Richard E. Myers Ii

Faculty Publications

No abstract provided.

Response Of Plethodon Cinereus To Chemical Cues From Different Numbers Of Conspecifics, Loren M. Hurst, Geoffrey R. Smith

Faculty Publications

No abstract provided.

The University Library: The Center Of A University Education?, Patricia A. Frade, Allyson Washburn

Faculty Publications

During 2001-2002, a formal study was conducted jointly by Brigham Young University's Office of Planning and Assessment (OPA) and the Harold B. Lee Library (HBLL) to determine the value of the library to the university community. The study described in this paper was undertaken at a time when some experts were predicting the demise of the academic library, and university administrators were questioning the need for new building, budget, and personnel requests. This paper will present a description of the study and its results, a comparison of similar data collected two years later, and a description of two new student …

Mi Mama Es Bonito: Acquisition Of Spanish Gender By Native English Speakers, Scott M. Alvord, Lisa Griebling Mccowen

Faculty Publications

For an adult, learning a second language can be a complex and demanding task. Differences between one’s native language and the target language can contribute to the complexity of the task. One significant way in which languages can differ is the system of gender. The difference between gender in English and Spanish provides a challenge for adult native English speakers learning Spanish as a second language. The aim of the current study is to examine gender marking on a variety of tasks by adult NS of English as beginning learners of Spanish, with hopes that such examination will provide insight …

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 …

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) …

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 …

“Scientific Explorers: A Review Of Literature On Lewis And Clark’S Ethnography, Botany, And Zoology.”, Jay H. Buckley, Julie Harris Adams

Faculty Publications

WHEN MERIWETHER LEWIS and William Clark returned to St. Louis in 1806, they had just completed a difficult and dangerous two-and-a-half-year journey through the West. Citizens of St. Louis hailed them as heroes, celebrating the captains as courageous explorers, expert frontiersmen, and skilled military leaders. But when Lewis and Clark embarked on their journey in 1804 to explore the Missouri and Columbia rivers and find a viable waterway to the Pacific, plus examine the possibilities for a potentially lucrative fur trade, they carried another important commission from President Thomas Jefferson: to describe in detail the natural world through which they …

Where The Cardinals Come To Sing, Scott Moncrieff

Faculty Publications

No abstract provided.

Quantification Of Doxorubicin Concentration In Rat Tissues Using Polymeric Micelles In Ultrasonic-Drug Delivery, William G. Pitt, Beverly Roeder, Bryant J. Staples

Faculty Publications

The triblock copolymer, Pluronic P105, has been found to be an ideal ultrasonically activated drug delivery vehicle because it forms micelles with hydrophobic polypropylene oxide cores that sequester hydrophobic drugs (Fig. 1). These micelles release their contents upon the application of low frequency ultrasound [1]such that drugs can be released specifically at the ultrasonicated region (Fig. 2). Such ultrasonically controlled release has been effective against cancer cells in vitro [2] and in vivo [3]. The purpose of this research is to assess the use of these novel polymeric micelles in ultrasonically-activated Doxorubicin® (DOX) delivery to tumors. This cancer therapy involves …

Mathematically Modeling The Effects Of Counting Factor (Cf) In Dictyostelium Discoideum, J. C. Dallon, W. Jang, R. H. Gomer

Faculty Publications

Size regulation is a crucial feature in many biological systems, with misregulation leading to dysplasia or hyperplasia. The recent discovery of counting factor (CF) in Dictyostelium discoideum will lead to a greater understanding of how the system regulates the size of a group of cells. In this paper we mathematically model the known effects of CF using two different models: a cellular automata model and a discrete continuum hybrid model. With the use of these models we are able to understand how modulation of adhesion and motile forces by CF can facilitate stream breakup. In addition, the modelling suggests a …

Use Of Thermally Induced Higher Order Modes Of A Microcantilever For Mercury Vapor Detection, Gregory P. Nordin, Michael A. George, Ashwini R. Kadam

Faculty Publications

We demonstrate the use of thermally induced higher order modes of a microcantilever as an alternate detection technique by studying Au-Hg interactions. The first four thermally induced flexural modes - i.e., the fundamental and first three higher order modes - have been examined for two different Au coatings. In the first case, 50 nm thick Au is sputter deposited along the entire length of a rectangular Si microcantilever. In the second case the Au is confined to a 30 µm length at the tip of the Si microcantilever. In both cases the microcantilever spectral response and deflection has been studied …

Learning Competent Fathering: A Longitudinal Analysis Of Marital Intimacy And Fathering, Kay Bradford, Alan J. Hawkins

Faculty Publications

Although scholars have documented many links between marital relationships and parenting, these associations are not commonly explained in terms of behavior that is learned or achieved over time. This paper examines the idea that good fathering – conceptualized here as competent fathering – is the result of a developmental process, and that a loving, committed relationship between parents creates a context in which traits supportive of caring fathering are likely to be learned and practiced. After setting the stage conceptually, we provide a modest initial test of this hypothesis to discern the associations between three components of marital intimacy (emotional …

Analysis Of Sunflower Shells By X-Ray Photoelectron Spectroscopy, Guilin Jiang, Ghaleb A. Husseini, Larry Lin Baxter, Matthew R. Linford

Faculty Publications

Determining the chemical structure and composition of biomass fuels using x-ray photoelectron spectroscopy (XPS) can provide fundamental knowledge of their structures that is useful in understanding and predicting their combustion behavior. Sunflower shells are an example of an agricultural residue (byproduct of food and feed production) of potential interest for biomass combustion. The XPS spectra of sunflower shells provide both its elemental composition and indications of its bonding. Traditional fuel analyses of this fuel are also provided. These include: ultimate analysis — the elemental composition of the overall fuel (C, H, N, S, and O); chlorine analysis — reported here …

Research Article| December 30 2005 Analysis Of Shea Nut Shells By X-Ray Photoelectron Spectroscopy, Guilin Jiang, Ghaleb A. Husseini, Larry Lin Baxter, Matthew R. Linford

Faculty Publications

Determining the chemical structure and composition of biomass fuels using x-ray photoelectron spectroscopy (XPS) can provide fundamental knowledge of their structures that is useful in understanding and predicting their combustion behavior. Shea nut shells are an example of an agricultural residue (byproduct of food and feed production) of potential interest for biomass combustion. The XPS spectra of shea nut shells provide both its elemental composition and indications of its bonding. Traditional fuel analyses of this fuel are also provided. These include: ultimate analysis — the elemental composition of the overall fuel (C, H, N, S, and O); chlorine analysis — …

Analysis Of Sawdust By X-Ray Photoelectron Spectroscopy, Guilin Jiang, Ghaleb A. Husseini, Larry Lin Baxter, Matthew R. Linford

Faculty Publications

Determining the chemical structure and composition of biomass fuels using x-ray photoelectron spectroscopy XPS can provide fundamental knowledge of their structures that is useful in understanding and predicting their combustion behavior. Sawdust is an example of a forest product residue byproduct of paper and lumber production of potential interest for biomass combustion. The XPS spectra of sawdust provide both its elemental composition and indications of its bonding. Traditional fuel analyses of this fuel are also provided. These include: ultimate analysis — the elemental composition of the overall fuel C, H, N, S, and O; chlorine analysis — reported here as …

Analysis Of Sugar Beet Pulp By X-Ray Photoelectron Spectroscopy, Guilin Jiang, Ghaleb A. Husseini, Larry Lin Baxter, Matthew R. Linford

Faculty Publications

Determining the chemical structure and composition of biomass fuels using x-ray photoelectron spectroscopy XPS can provide fundamental knowledge of their structures that is useful in understanding and predicting their combustion behavior. Sugar beet pulp is an example of an agricultural residue byproduct of food and feed production of potential interest for biomass combustion. The XPS spectra of sugar beet pulp provide both its elemental composition and indications of its bonding. Traditional fuel analyses of this fuel are also provided. These include: ultimate analysis — the elemental composition of the overall fuel C, H, N, S, and O; chlorine analysis — …

Analysis Of Grain Screenings By X-Ray Photoelectron Spectroscopy, Guilin Jiang, Ghaleb A. Husseini, Larry Lin Baxter, Matthew R. Linford

Faculty Publications

Determining the chemical structure and composition of biomass fuels using x-ray photoelectron spectroscopy XPS can provide fundamental knowledge of their structures that is useful in understanding and predicting their combustion behavior. Grain screenings are an example of an agricultural residue byproduct of food and feed production of potential interest for biomass combustion. The XPS spectra of grain screenings provide both its elemental composition and indications of its bonding. Traditional fuel analyses of this fuel are also provided. These include: ultimate analysis — the elemental composition of the overall fuel C, H, N, S, and O; chlorine analysis — reported here …

Analysis Of Straw By X-Ray Photoelectron Spectroscopy, Guilin Jiang, Ghaleb A. Husseini, Larry Lin Baxter, Matthew R. Linford

Faculty Publications

Determining the chemical structure and composition of biomass fuels using x-ray photoelectron spectroscopy XPS can provide fundamental knowledge of their structures that is useful in understanding and predicting their combustion behavior. Straw is an example of an agricultural residue byproduct of food and feed production of potential interest for biomass combustion. The XPS spectra of straw provide both its elemental composition and indications of its bonding. Traditional fuel analyses of this fuel are also provided. These include: ultimate analysis — the elemental composition of the overall fuel C, H, N, S, and O; chlorine analysis — reported here as part …

Fluctuations And Noise: A General Model With Applications, R. F. O'Connell

Faculty Publications

A wide variety of dissipative and fluctuation problems involving a quantum system in a heat bath can be described by the independent-oscillator (10) model Hamiltonian. Using Heisenberg equations of motion, this leads to a generalized quantum Langevin equation (QLE) for the quantum system involving two quantities which encapsulate the properties of the heat bath. Applications include: atomic energy shifts in a blackbody radiation heat bath; solution of the problem of runaway solutions in QED; electrical circuits (resistively shunted Josephson barrier, microscopic tunnel junction, etc.); conductivity calculations (since the QLE gives a natural separation between dissipative and fluctuation forces); dissipative quantum …

The Identity Of Catfishes Identified As Mystus Cavasius (Hamilton, 1822) (Teleostei: Bagridae), With A Description Of A New Species From Myanmar, Prosanta Chakrabarty, Heok Hee Ng

Faculty Publications

The identity of South Asian riverine bagrid catfishes usually referred to as Mystus cavasius (Hamilton, 1822) is reviewed. Three species comprise what is currently understood as M. cavasius: M. cavasius s. str. from northern India, M. seengtee from southern India and a new species, M. falcarius, from the Salween and Irrawaddy river drainages in Myanmar and the shorter river drainages in southern Myanmar. Mystus seengtee is resurrected from synonymy with M. cavasius and both species are redescribed. The three species differ from other congeners with a long-based adipose fin in having a combination of a black spot in front of …

Conformational Studies Of The Tetramerization Site Of Human Erythroid Spectrin By Cysteine-Scanning Spin-Labeling Epr Methods, Shahila Mehboob, Bing Hao Luo, Wentao Fu, Michael E. Johnson, L. W.M. Fung

Faculty Publications

We used cysteine-scanning and spin-labeling methods to prepare singly spin labeled recombinant peptides for electron paramagnetic resonance studies of the partial domain regions at the tetramerization site (N-terminal end of α and C-terminal end of β) of erythroid spectrin. The values of the inverse line width parameter (ΔH0-1) from a family of SpoI-1-368Δ peptides scanning residues 21-30 exhibited a periodicity of ∼3.5-4. We used molecular dynamics calculations to show that the asymmetric mobility of this helix is not necessarily due to tertiary contacts, but is likely due to intrinsic properties of helix C′, a helix with a heptad pattern sequence. …

Top-Down Structure And Device Fabrication Using In Situ Nanomachining, Xiaodong Li, Xinnan Wang, Qihua Xiong, Peter C. Eklund

Faculty Publications

We demonstrate the potential of an alternative tool for the fabrication of nanoscale structures and devices. A nanoindenter integrated with an atomic force microscope is shown to be a powerful machine tool for cutting precise length nanowires or nanobelts and for manipulating the shortened wires. We also demonstrate its utility in cutting grooves and fabricating dents (or periodic arrays of dents) in ZnSnanobelts. This approach permits the direct mechanical machining of nanodevices that are supported on a substrate without the inherent complications of e beam or photolithography.

Diversity And Structure Of Bacterial Chemolithotrophic Communities In Pine Forest And Agroecosystem Soils, J. Tolli, G. M. King

Faculty Publications

Obligate lithotrophs (e.g., ammonia oxidizers) and facultative lithotrophs (e.g., CO and hydrogen oxidizers) collectively comprise a phylogenetically diverse functional group that contributes significantly to carbon and nitrogen cycles in soils and plays important roles in trace gas dynamics (e.g., carbon monoxide and nitrous and nitric oxides) that affect tropospheric chemistry and radiative forcing. In spite of their diverse physiologies, facultative and obligate lithotrophs typically possess the Calvin-Benson-Bassham cycle enzyme, ribulose-1,5-bisphosphate carboxylase/oxygenase (rubisCO). In an effort designed to understand the structure of lithotrophic communities in soil, genomic DNA extracts from surface (0 to 2 cm) and subsurface (5 to 7 cm) …

Glycosylphosphatidylinositol-Anchored Proteins Are Required For Cell Wall Synthesis And Morphogenesis In Arabidopsis, C. Stewart Gillmor, Wolfgang Lukowitz, Ginger Brininstool, John C. Sedbrook, Thorsten Hamann, Patricia Poindexter, Chris Somerville

Faculty Publications

Mutations at five loci named PEANUT1-5 (PNT) were identified in a genetic screen for radially swollen embryo mutants, pnt1 cell walls showed decreased crystalline cellulose, increased pectins, and irregular and ectopic deposition of pectins, xyloglucans, and callose. Furthermore, pnt1 pollen is less viable than the wild type, and pnt1 embryos were delayed in morphogenesis and showed defects in shoot and root meristems. The PNT1 gene encodes the Arabidopsis thaliana homolog of mammalian PIG-M, an endoplasmic reticulum-localized mannosyltransferase that is required for synthesis of the glycosylphosphatidylinositol (GPI) anchor. All five pnt mutants showed strongly reduced accumulation of GPI-anchored proteins, suggesting that …

Cryopreservation Of Human Hematopoietic Stem And Progenitor Cells Loaded With Trehalose: Transient Permeabilization Via The Adenosine Triphosphate-Dependent P2z Receptor Channel, Sandhya S. Buchanan, Michael A. Menze, Steven C. Hand, David W. Pyatt, John F. Carpenter

Faculty Publications

Hematopoietic stem and progenitor cells (HPCs) are a heterogenic population of cells used to treat a number of human diseases. Multilineage differentiation is a required function in successful hematopoietic reconstitution after transplantation of cryopreserved grafts. Conventional use of the cryoprotectant dimethyl sulfoxide (DMSO) has resulted in some reports of infusion related toxicity attributed to DMSO and/or damage to cells during freeze-thawing procedures. The purpose of this study was to explore the use of trehalose, a nontoxic disaccharide of glucose, as an alternative cryoprotectant. Trehalose was introduced into HPCs using the P2Z receptor, known to form nonselective pores in the presence …

Importance Of Race/Ethnicity In Clinical Trials: Lessons From The African-American Heart Failure Trial (A-Heft), The African-American Study Of Kidney Disease And Hypertension (Aask), And The Antihypertensive And Lipid-Lowering Treatment To Prevent Heart Attack Trial (Allhat), Anne L. Taylor, Jackson T. Wright, Richard S. Cooper

Faculty Publications

No abstract provided.