Digital Commons Network^™

Aerosol-Assisted Synthesis Of Monodisperse Single-Crystalline Α-Cristobalite Nanospheres, Xingmao Jiang, Lihong Bao, Yung-Sung Cheng, Darren R. Dunphy, Xiaodong Li, C. Jeffrey Brinker

Faculty Publications

Monodisperse single-crystalline α-cristobalite nanospheres have been synthesized by hydrocarbon-pyrolysis-induced carbon deposition on amorphous silica aerosol nanoparticles, devitrification of the coated silica at high temperature, and subsequent carbon removal by oxidation. The nanosphere size can be well controlled by tuning the size of the colloidal silica precursor. Uniform, high-purity nanocrystalline α-cristobalite is important for catalysis, nanocomposites, advanced polishing, and understanding silica nanotoxicology.

Effects Of Prenatal Food And Micronutrient Supplementation On Child Growth From Birth To 54 Months Of Age: A Randomized Trial In Bangladesh, Ashraful Islam Khan, Iqbal Kabir, Eva-Charlotte Ekström, Kajsa Åsling-Monemi, Dewan Shamsul Alam, Edward A. Frongillo Jr., Md Yunus, Shams Arifeen, Lars-Åke Persson

Faculty Publications

Background: There is a lack of information on the optimal timing of food supplementation to malnourished pregnant women and possible combined effects of food and multiple micronutrient supplementations (MMS) on their offspring's growth. We evaluated the effects of prenatal food and micronutrient interventions on postnatal child growth. The hypothesis was that prenatal MMS and early invitation to food supplementation would increase physical growth in the offspring during 0-54 months and a combination of these interventions would further improve these outcomes.

Methods: In the large, randomized MINIMat trial (Maternal and Infant Nutrition Interventions in Matlab), Bangladesh, 4436 pregnant women were enrolled …

December 7, 2011 Faculty Senate Minutes, University Of South Carolina

Faculty Senate

No abstract provided.

Long-Term Effects Of Changes In Cardiorespiratory Fitness And Body Mass Index On All-Cause And Cardiovascular Disease Mortality In Men: The Aerobics Center Longitudinal Study, Duck-Chul Lee, Xuemei Sui, Enrique G. Artero, I-Min Lee, Timothy S. Church, Paul A. Mcauley, Fatima C. Stanford, Harold W. Kohl Iii, Steven N. Blair

Faculty Publications

Background - The combined associations of changes in cardiorespiratory fitness and body mass index (BMI) with mortality remain controversial and uncertain.

Methods and Results - We examined the independent and combined associations of changes in fitness and BMI with all-cause and cardiovascular disease (CVD) mortality in 14,345 men (mean age 44 years) with at least 2 medical examinations. Fitness, in metabolic equivalents (METs), was estimated from a maximal treadmill test. BMI was calculated using measured weight and height. Changes in fitness and BMI between the baseline and last examinations over 6.3 years were classified into loss, stable, or gain groups. …

The Daily Gamecock, Friday, December 2, 2011, University Of South Carolina, Office Of Student Media

December

No abstract provided.

The Daily Gamecock, Thursday, December 1, 2011, University Of South Carolina, Office Of Student Media

December

No abstract provided.

College Student Reactions To Health Warning Labels: Sociodemographic And Psychosocial Factors Related To Perceived Effectiveness Of Different Approaches, Carla J. Berg, James F. Thrasher, J. Lee Westmaas, Taneisha Buchanan, Erika A. Pinsker, Jasjit S. Ahluwalia

Faculty Publications

Objective. To examine factors associated with perceiving different types of pictorial cigarette health warning labels as most effective in motivating smokers to quit or preventing smoking initiation among college students.

Method. We administered an online survey to 24,055 students attending six Southeast colleges in Fall, 2010. We obtained complete data for the current analysis from 2600.

Results. Current smoking prevalence was 23.5%. The largest majority (78.6%) consistently rated gruesome images as most effective, 19.5% rated testimonial images as most effective, and only a small proportion rated either standard (1.6%) or human suffering images (0.3%) as most effective. Subsequent analyses focused …

Relationship Between Vancomycin Trough Concentrations And Nephrotoxicity: A Prospective Multicenter Trial, John A. Bosso, Jean Nappi, Celeste Rudisill, Marlea Wellein, P Brandon Bookstaver, Jenna Swindler, Patrick D. Mauldin

Faculty Publications

Several single-center studies have suggested that higher doses of vancomycin, aimed at producing trough concentrations of >15 mg/liter, are associated with increased risk of nephrotoxicity. We prospectively assessed the relative incidence of nephrotoxicity in relation to trough concentration in patients with documented methicillin-resistant Staphylococcus aureus (MRSA) infections at seven hospitals throughout South Carolina. Adult patients receiving vancomycin for at least 72 h with at least one vancomycin trough concentration determined under steady-state conditions were prospectively studied. The relationship between vancomycin trough concentrations of >15 mg/ml and the occurrence of nephrotoxicity was assessed using univariate and multivariate analyses, controlling for age, …

The Daily Gamecock, Tuesday, November 29, 2011, University Of South Carolina, Office Of Student Media

November

No abstract provided.

The Daily Gamecock, Monday, November 28, 2011, University Of South Carolina, Office Of Student Media

November

No abstract provided.

Associations Between Physical Activity And Submaximal Cardiorespiratory And Pulmonary Responses In Men, John C. Sieverdes, Xuemei Sui, Steven N. Blair

Faculty Publications

Background: Habitual physical activity (PA) is associated with higher cardiorespiratory fitness values, but additional information is needed on the contributions of specific types and amounts of PA. Therefore the main aim of this study was to analyze the heart and lung function of a large cohort of men and compare these outcomes with various modes and volumes of PA.

Methods: We used data from 30,594 men from the Aerobics Center Longitudinal Study who were categorized into sedentary, swimmer, walker, and runner groups using self-report PA data collected during 1970-2005. Additional PA categories using MET-minutes/week were used to group men into …

One-Step Infiltration Of Mixed Conducting Electrocatalysts For Reducing Cathode Polarization Of A Commercial Cathode-Supported Sofc, Nansheng Xu, Xue Li, Xuan Zhao, Hailei Zhao, Kevin Huang

Faculty Publications

Infiltrating fine-grained electrocatalyst particles of either ion conducting or mixed electron and ion conducting (MEIC) material into a ceramic porous electrode scaffold has proven a very effective way to improve electrode performance for low to intermediate temperature solid oxide fuel cells (SOFCs). We report here one-step infiltration of MEIC fine particles, La_0.6Sr_0.4CoO_3-δ (LSCo) and SrCo_0.8Fe_0.2O_3-δ (SCF), into a commercial cathode substrate. A comparative study shows that the cathode polarization can be considerably reduced by a factor of 17 to 28 and 28 to 49 from 1000 to 700 ³C by …

The Daily Gamecock, Friday, November 18, 2011, University Of South Carolina, Office Of Student Media

November

No abstract provided.

The Daily Gamecock, Tuesday, November 15, 2011, University Of South Carolina, Office Of Student Media

November

No abstract provided.

Colonoscopy Screening Rates Among Patients Of Colonoscopy-Trained African American Primary Care Physicians, Sudha Xirasagar, Thomas G. Hurley, James B. Burch, Ali Mansaray, James R. Hébert

Faculty Publications

Background - When performed competently, colonoscopy screening can reduce colorectal cancer rates, especially in high-risk groups such as African Americans (AAs). Training primary care physicians (PCPs) to perform colonoscopy may improve screening rates among underserved high-risk populations.

Methods - We compared colonoscopy screening rates and computed adjusted odds ratios for colonoscopy-eligible patients of trained AA PCPs (study group) vs. untrained PCPs (comparison group), before and since initiating colonoscopy training. All colonoscopies were performed at a licensed ambulatory surgery center with specialist standby support. Retrospective chart review was conducted on 200 consecutive, established outpatients aged ≥50 years at each of 12 …

The Daily Gamecock, Monday, November 14, 2011, University Of South Carolina, Office Of Student Media

November

No abstract provided.

The Daily Gamecock, Friday, November 11, 2011, University Of South Carolina, Office Of Student Media

November

No abstract provided.

The Daily Gamecock, Thursday, November 10, 2011, University Of South Carolina, Office Of Student Media

November

No abstract provided.

The Daily Gamecock, Wednesday, November 9, 2011, University Of South Carolina, Office Of Student Media

November

No abstract provided.

The Daily Gamecock, Tuesday, November 8, 2011, University Of South Carolina, Office Of Student Media

November

No abstract provided.

The Daily Gamecock, Monday, November 7, 2011, University Of South Carolina, Office Of Student Media

November

No abstract provided.

The Daily Gamecock, Friday, November 4, 2011, University Of South Carolina, Office Of Student Media

November

No abstract provided.

Density Functional Theory Study On The Electronic Structure Of N- And P-Type Doped Srtio3 At Anodic Solid Oxide Fuel Cell Conditions, Suwit Suthirakun, Salai Cheettu Ammal, Guoliang Xiao, Fanglin Chen, Andreas Heyden, Hans-Conrad Zur Loye

Faculty Publications

The electronic conductivity and thermodynamic stability of mixed n-type and p-type doped SrTiO₃ have been investigated at anodic solid oxide fuel cell (SOFC) conditions using density functional theory (DFT) calculations. In particular, constrained ab initio thermodynamic calculations have been performed to evaluate the phase stability and reducibility of various Nb- and Ga-doped SrTiO₃ at synthesized and anodic SOFC conditions. The density of states (DOS) of these materials was analyzed to study the effects of n- and p-doping on the electronic conductivity. In agreement with experimental observations, we find that the transformation from 20% Nb-doped Sr-deficient SrTiO …

November 2, 2011 Faculty Senate Minutes, University Of South Carolina

Faculty Senate

No abstract provided.

Presidential Power And Constitutional Responsibility, Thomas P. Crocker

Faculty Publications

Some constitutional theorists defend unbounded executive power to respond to emergencies or expansive discretionary powers to complete statutory directives. Against these anti-Madisonian approaches, this Article examines how the textual assignment of republican virtues helps to constitute and constrain the president's power. The Madisonian solution for constitutional constraint both creates institutions for unenlightened statesmen and relies on virtue to make governing possible. Constitutional responsibility is a consistent textual theme found in the command to "take Care that the Laws be faithfully executed," the responsibility to remain faithful to the office of president, and the obligation to preserve the Constitution itself. Although …

A Randomized Trial Of A Diet And Exercise Intervention For Overweight And Obese Women From Economically Disadvantaged Neighborhoods: Sisters Taking Action For Real Success (Stars), Sarah Wilcox, Patricia A. Sharpe, Deborah Parra-Medina, Michelle L. Granner, Brent E. Hutto

Faculty Publications

Background - Lower socioeconomic status at both the individual and neighborhood level is associated with increased health risks. Weight loss can reduce this risk, but few high quality weight loss studies target this population.

Objectives - STARS tests a culturally-appropriate, group-based behavioral and social support intervention on body weight and waist circumference in women from financially disadvantaged neighborhoods.

Design - A stratified (by BMI) randomized trial. Randomization to group was generated by a random numbers table with allocation concealment by opaque envelopes.

Methods - Participants 25-50 years who had a BMI ≥ 25 kg/m² and a waist circumference ≥ …

Mechanisms Of The Contextual Interference Effect In Individuals Poststroke, Nicolas Schweughofer, Jeong-Yoon Lee, Hui-Ting Goh, Youggeun Choi, Sung Shin Kim, Jill Campbell Stewart Pt,Phd, Rebecca Lewthwaite, Carolee J. Winstein

Faculty Publications

Although intermixing different motor learning tasks via random schedules enhances long-term retention compared with “blocked” schedules, the mechanism underlying this contextual interference effect has been unclear. Furthermore, previous studies have reported inconclusive results in individuals poststroke. We instructed participants to learn to produce three grip force patterns in either random or blocked schedules and measured the contextual interference effect by long-term forgetting: the change in performance between immediate and 24-h posttests. Nondisabled participants exhibited the contextual interference effect: no forgetting in the random condition but forgetting in the blocked condition. Participants at least 3 mo poststroke exhibited no forgetting in …

Giant Magnetostriction In Annealed Co1-XFeX Thin-Films, Dwight Hunter, Will Osborn, Ke Wang, Nataliya Kazantseva, Jason R. Hattrick-Simpers, Richard Suchoski, Ryota Takahashi, Marcus L. Young, Apurva Mehta, Leonid A. Bendersky, Same E. Lofland, Manfred Wuttig, Ichiro Takeuchi

Faculty Publications

Chemical and structural heterogeneity and the resulting interaction of coexisting phases can lead to extraordinary behaviours in oxides, as observed in piezoelectric materials at morphotropic phase boundaries and relaxor ferroelectrics. However, such phenomena are rare in metallic alloys. Here we show that, by tuning the presence of structural heterogeneity in textured Co_1−xFe_x thin films, effective magnetostriction λeff as large as 260 p.p.m. can be achieved at low-saturation field of ~10 mT. Assuming λ100 is the dominant component, this number translates to an upper limit of magnetostriction ofλ100≈5λeff >1,000 p.p.m. Microstructural analyses …

The Association Between The Type, Context, And Levels Of Physical Activity Amongst Adolescents, Harriet Koorts, Calum Mattocks, Andy R. Ness, Kevin Deere, Steven N. Blair, Russell R. Pate, Chris Riddoch

Faculty Publications

Background: Little is known about how the type and context of physical activity behaviors varies among adolescents with differing activity levels. The aim of this study was to assess differences in the type and context of physical activity behaviors in adolescents by level of objectively measured physical activity. Methods: Cross-sectional analysis of 2728 adolescents (1299 males, 1429 females) participating in the Avon Longitudinal Study of Parents and Children (ALSPAC). The mean (SD) age was 13.8 (+0.1) years. Physical activity was measured using an Actigraph over 7 days. Adolescents were categorized into tertiles of activity (less, moderately, highly active) using counts/min …

Modern Police Practices: Arizona V. Gant's Illusory Restriction Of Vehicle Searches Incident To Arrest, Seth W. Stoughton

Faculty Publications

In 2009, the Supreme Court overturned thirty years of precedent with a decision that purported to dramatically cut back on the ability of law enforcement officers to conduct warrantless vehicle searches incident to the arrest of a vehicle occupant. Scholars and commentators celebrated Arizona v. Gant’s constraint of police, and subsequent scholarship has focused exclusively on peripheral concerns such as alternative justifications for warrantless searches and Gant’s effect on non-vehicle searches. This Note challenges the core assumption that Gant will substantially limit vehicle searches incident to arrest, contending that Gant is far more permissive than it appears. In most cases, …