Waylon Howard, Mijke Rhemtulla, Todd D. Little,
To deal with missing data that arise due to participant nonresponse or attrition, methodologists have recommended an "inclusive" strategy where a large set of auxiliary variables are used to inform the missing data process. In practice, the set of possible auxiliary variables is often too large. We propose using principal components analysis (PCA) to reduce the number of possible auxiliary variables to a manageable number. A series of Monte Carlo simulations compared the performance of the inclusive ...
Tópico(s): Psychometric Methodologies and Testing
2015 - Taylor & Francis | Multivariate Behavioral Research
Waylon Weber, Dean Kracko, M Lehman, C. Mitch Irvin, Lee F. Blair, Richard K. White, Janet M. Benson, Gary R. Grotendorst, Yung‐Sung Cheng, Jacob D. McDonald,
Sulfur mustard (SM) is a chemical threat agent for which its effects have no current treatment. Due to the ease of synthesis and dispersal of this material, the need to develop therapeutics is evident. The present manuscript details the techniques used to develop SM laboratory exposure systems for the development of animal models of pulmonary injury. These models are critical for evaluating SM injury and developing therapeutics against that injury. Iterative trials were conducted to optimize a lung ...
Tópico(s): Environmental Toxicology and Ecotoxicology
2009 - Taylor & Francis | Toxicology Mechanisms and Methods
Waylon Weber, Rena Marr, Dean Kracko, Zhenyu Gao, Jacob D. McDonald, Kimberley Ui Chearnaigh,
Repeat oral doses of tungsten (W) show retention in kidneys, intestine, and femur as well as translocation of small amounts to neonates. Furthermore, W exposure leads to decreased function of molybdenum (Mo)-containing enzymes in kidneys, liver, and intestine. The chemical disposition of W (administered as sodium tungstate dihydrate in water) in plasma, liver, kidneys, uterus, femur, and intestine of rodents (Sprague-Dawley rats and C57Bl/6N mice) was characterized after repeat exposure by gavage (10 ...
Tópico(s): Mercury impact and mitigation studies
2008 - Taylor & Francis | Toxicological & Environmental Chemistry Reviews
Waylon Weber, Melanie Doyle‐Eisele, Dunstana Melo, Raymond A. Guilmette,
Purpose: To compare data on the whole-body distribution of plutonium-239 (239Pu4+) in rats following a single administration by intravenous injection (IV), inhalation, and wound (intramuscular injection [IM]).Material and methods: For each route of administration there were eight experimental groups, determined by the time of sacrifice following 239Pu4+ administration. The groups consisted of three male and three female F344 rats. Rats were placed in metabolism cages where urine and feces were collected ...
Tópico(s): Radiopharmaceutical Chemistry and Applications
2014 - Taylor & Francis | International Journal of Radiation Biology
Elizabeth Stein, Waylon Howard, Ali Rowhani‐Rahbar, Frederick P. Rivara, Douglas Zatzick, Carolyn A. McCarty,
To investigate the symptom trajectories of depressive and post-concussive symptoms (PCS) in slow-to-recover adolescents to understand how the two sets of symptoms are related.We used data from a randomized clinical trial of a collaborative care intervention for post-concussive symptoms to better understand how these two sets of symptoms change in parallel over 6 months.PCS and depressive symptom scores for 49 adolescents (ages 11-17) were measured at enrolment and after 1, 3, and 6 months. Latent ...
Tópico(s): Resilience and Mental Health
2017 - Taylor & Francis | Brain Injury
David Okech, Waylon Howard, Teresa Mauldin, Yoko Mimura, Junghyun Kim,
Economic pressure has negative effects on families living in poverty that require much resilience and strength to cope. Although the strengths perspective upholds many human service values, literature on how it can be used to build resilience of these families is scarce. This exploratory study reports on the relationship between the constructs of economic pressure and resilience among N = 194 individuals living in extreme poverty. The authors found a significant relationship between economic pressure ...
Tópico(s): Psychological Well-being and Life Satisfaction
2012 - Taylor & Francis | Journal of Poverty
JeanClare Seagrave, Waylon Weber, Gary R. Grotendorst,
Context: sulfur mustard (SM) causes skin blistering and long-term pulmonary dysfunction. Its adverse effects have been studied in battlefield-exposed humans, but lack of knowledge regarding confounding factors makes interpretation challenging. Animal studies are critical to understanding mechanisms, but differences between animals and humans must be addressed. Studies of cultured human cells can bridge animal studies and humans.Objective: Evaluate effects of SM vapor on airway cells.Materials and ...
Tópico(s): Synthesis and Biological Evaluation
2010 - Taylor & Francis | Inhalation Toxicology
Jacob D. McDonald, Waylon Weber, Rena Marr, Dean Kracko, Hnin Khain, R. Arimoto,
Abstract Tungsten (W) has been nominated for study to the National Toxicology Program (NTP) because of reported associations between concentrations of W in drinking water and childhood leukemia. The disposition of W (administered as sodium tungstate dihydrate in water) in plasma, liver, kidneys, uterus, femur, and intestine of rodents (Sprague-Dawley rats and C57BL/6N mice) was characterized after exposures by oral gavage (1, 10, or 100 mg/kg) or intravenous (1 mg/kg) administration. Each tissue (or plasma) ...
Tópico(s): Air Quality and Health Impacts
2007 - Taylor & Francis | Journal of Toxicology and Environmental Health
David Okech, Nathan B. Hansen, Waylon Howard, John K. Anarfi, Abigail C. Burns,
Human trafficking exerts psychological effects on survivors that persist after intervention, and even after community reintegration. Effects include anxiety, depression, alienation, disorientation, aggression, suicidal ideation, attention deficit, and posttraumatic stress disorder (PTSD). Community supports and coping mechanisms may mitigate these effects. The report presented here is part of a long-term program of research to develop and test evidence-informed mental health and human capacity-building ...
Tópico(s): Homelessness and Social Issues
2018 - Taylor & Francis | Behavioral Medicine
Janet M. Benson, Brad M. Tibbetts, Waylon Weber, Gary R. Grotendorst,
Abstract Sulfur mustard (SM), a vessicating agent, has been used in chemical warfare since 1918. The purpose of this study was to quantitate SM vapor deposition, tissue distribution, and excretion following intratracheal inhalation in rats and cutaneous exposure in guinea pigs. 14C-SM vapors for inhalation studies were generated by metering liquid 14C-SM into a heated J tube. Vapors were transported via carrier air supplemented with oxygen and isoflurane to an exposure plenum. Anesthetized rats with ...
Tópico(s): Toxic Organic Pollutants Impact
2011 - Taylor & Francis | Journal of Toxicology and Environmental Health
Melanie Doyle‐Eisele, Waylon Weber, Dunstana Melo, Raymond A. Guilmette,
Abstract Purpose: To compare data on the whole-body distribution of americium-241 ((241)Am) in rats following intravenous injection (IV), inhalation, and wound (intramuscular injection, IM).Following exposure, each rat was placed in an individual metabolism cages for the duration of the study, 28 days (d). Urine and feces were collected daily. Tissues and organs were collected and measured.Liver and skeleton were the main sites of deposition for all routes of exposure but the content differed substantially. ...
Tópico(s): Analytical chemistry methods development
2014 - Taylor & Francis | International Journal of Radiation Biology
1974 - Taylor & Francis | Popular Music & Society
(1974). Waylon Jennings' discography. Popular Music and Society: Vol. 3, No. 2, pp. 109-117.
Tópico(s): Music History and Culture
1974 - Taylor & Francis | Popular Music & Society
Jay Buzhardt, Charles R. Greenwood, Dale Walker, R. Anderson, Waylon Howard, Judith J. Carta,
We investigated Early Head Start home visitors’ use of evidence-based practices and the efficacy of a web-based system to support these practices. Home visitors learned to use 3 evidence-based practices: (a) frequent assessment of children's early communication for screening and progress monitoring, (b) 2 home-based language-promoting interventions, and (c) data-based decision making in the use of the language-promoting intervention strategies. Two conditions were compared in a randomized control trial. ...
Tópico(s): Language Development and Disorders
2011 - Taylor & Francis | NHSA Dialog
Philippe Foubert, Melanie Doyle‐Eisele, Andreina D. Gonzalez, Felipe Berard, Waylon Weber, Diana Zafra, Zeni Alfonso, Sherry Zhao, Mayer Tenenhaus, John K. Fraser,
To develop an approach that models the cutaneous healing that occurs in a patient with full thickness thermal burn injury complicated by total body radiation exposure sufficient to induce sub-lethal prodromal symptoms. An assessment of the effects of an autologous cell therapy on wound healing on thermal burn injury with concomitant radiation exposure was used to validate the utility of the model.Göttingen minipigs were subjected to a 1.2 Gy total body irradiation by exposure to a 6 MV X-ray linear ...
Tópico(s): Effects of Radiation Exposure
2016 - Taylor & Francis | International Journal of Radiation Biology
James E. Huckle, Matthew P. Sadgrove, Erik Pacyniak, Marina G. D. Leed, Waylon Weber, Melanie Doyle‐Eisele, Raymond A. Guilmette, Bushra J. Agha, Robert L. Susick, Russell J. Mumper, Michael Jay,
Purpose: Currently two injectable products of diethylenetriaminepentaacetic acid (DTPA) are U.S. Food and Drug Administration (FDA)-approved for decorporation of 241Am; however, an oral product is considered more amenable in a mass casualty situation. The di-ethyl ester of DTPA, named C2E2, is being developed as an oral drug for treatment of internal radionuclide contamination.Materials and methods: Single-dose decorporation efficacy of C2E2 administered 24-h post contamination was determined in beagle ...
Tópico(s): Chemical Safety and Risk Management
2015 - Taylor & Francis | International Journal of Radiation Biology
Robert T. Golembiewski, Robert Munzenrider, Katherine Scherb, Waylon Billingsley,
Abstract Abstract This exploratory study extends the phase model of burnout in a critical direction by assessing whether individuals assigned to eight progressive phases will present escalating mental health symptoms. Despite the small convenience population (N = 161), the present affirmative results encourage early replications for three basic reasons. Thus the associations with mental health reported here are consistent with numerous other tests of the concurrent validity of the phase model. Moreover, ...
Tópico(s): Mental Health Treatment and Access
1992 - Taylor & Francis | Anxiety Stress & Coping
David Okech, Stephen V. McGarity, Nathan B. Hansen, Abigail C. Burns, Waylon Howard,
Improving the economic well-being of the girls and women is a key to reducing re-trafficking and in providing stability that survivors can use to rebuild their lives. The study looks at how various sociodemographic traits affected the financial capability of n = 144 women and girls who received intervention at a residential care facility in Ghana, West Africa. Three domain of financial capability are assessed in this, i.e., financial risk, financial planning, and financial saving. A scaled likelihood ...
Tópico(s): Microfinance and Financial Inclusion
2017 - Taylor & Francis | Journal of Evidence-Informed Social Work
Dunstana Melo, Waylon Weber, Melanie Doyle‐Eisele, Raymond A. Guilmette,
Purpose: This manuscript compares the behavior of monomeric 239Pu4+-citrate injected intravenously in rats and dogs with a comparison of available humans’ data.Material and methods: The experimental design for these two studies consisted of eight groups sacrificed at predetermined time-points post exposure. All organs and tissues as well as daily urinary and fecal excretion were analyzed.Results: Liver and skeleton were the organs with the highest 239Pu uptake in both species; 76% in dogs and 70% ...
Tópico(s): Radiopharmaceutical Chemistry and Applications
2014 - Taylor & Francis | International Journal of Radiation Biology
Waylon T. Hunt, Pradeep Salins, Christopher M. Anderson, Francis Amara,
Alzheimer's disease (AD), a severe form of senile dementia is a neurodegenerative disorder. One of the most well characterized hallmarks of AD are extra-neuronal aggregates of amyloid-beta peptide (A� ), known as amyloid plaques. Recent epidemiological studies suggest a link between statin intake, and a lowered incidence of AD. Statins are 3-hydroxy-3-methylglutaryl co-enzyme reductase (HMG) inhibitors, which are one of the most commonly prescribed drug groups used to lower serum cholesterol levels in ...
Tópico(s): Computational Drug Discovery Methods
2010 - Bentham Science Publishers | The Open Neuroscience Journal
Nam-Cheol Kim, Katayoon Ghanbari, Dean Kracko, Waylon Weber, Jacob D. McDonald, Kelly J. Dix,
The metabolism of orally administered N,N-dimethyl-p-toluidine (DMPT) in male F344 rats was investigated. The rat urinary metabolite profile was determined by analytical reverse-phase high performance liquid chromatography (HPLC). Four radiolabeled peaks were observed, isolated, and purified by solid-phase extraction (SPE) and preparative HPLC methods. The 4 peaks were identified as p-(N-acetylhydroxyamino)hippuric acid (M1), DMPT N-oxide (M2), N-methyl-p-toluidine (M3), and parent DMPT. Metabolites M1 ...
Tópico(s): Pharmacogenetics and Drug Metabolism
2007 - Taylor & Francis | Journal of Toxicology and Environmental Health
Lilia Yumagulova, Meg Parsons, Darlene Yellow Old Woman-Munro, Emily Dicken, Simon J. Lambert, Naura Vergustina, John C. Scott, Patrick Michell, Waylon Black,
For millennia, Indigenous Peoples around the world have prepared for, coped with, and survived disasters and environmental change, and human-induced events. Along the way, these experiences – and a keen understanding of the environment in which they live – have borne what we refer to today as Indigenous Knowledges. Among the most significant of the human-induced events, colonization has disrupted Indigenous strategies of self-determination and resilience. Indigenous-led climate change adaptation holds ...
Tópico(s): Climate Change, Adaptation, Migration
2023 - Taylor & Francis | Climate and Development
Waylon Weber, Dean Kracko, M Lehman, Christopher E. Cox, Yung‐Sung Cheng, Gary R. Grotendorst, Jacob D. McDonald,
Sulfur mustard (SM) is a chemical threat agent for which the effects have no current treatment. Due to the ease of synthesis and dispersal of this material, the need to develop therapeutics is evident. The present article details the techniques used to develop SM laboratory exposure systems for the development of animal models of ocular and dermal injury. These models are critical to enable evaluation of SM injury and therapeutics against that injury. Iterative trials were conducted to optimize dermal ...
Tópico(s): Insect and Pesticide Research
2011 - Taylor & Francis | Toxicology Mechanisms and Methods
Waylon T. Hunt, Pradeep Salins, Christopher M. Anderson, Francis Amara,
Alzheimer's disease (AD), a severe form of senile dementia is a neurodegenerative disorder.One of the most well characterized hallmarks of AD are extra-neuronal aggregates of amyloid-beta peptide (A ), known as amyloid plaques.Recent epidemiological studies suggest a link between statin intake, and a lowered incidence of AD.Statins are 3-hydroxy-3-methylglutaryl co-enzyme reductase (HMG) inhibitors, which are one of the most commonly prescribed drug groups used to lower serum cholesterol levels in patients ...
Tópico(s): Cancer, Lipids, and Metabolism
2010 - Bentham Science Publishers | The Open Neuroscience Journal
Melanie Doyle‐Eisele, Jeremy Brower, Kenneth D. Aiello, Emily M Ferranti, Michael J. Yaeger, Guodong Wu, Waylon Weber,
Purpose Current animal models of hematopoietic-acute radiation syndrome (H-ARS) are resource intensive and have limited translation to humans, thereby inhibiting the development of effective medical countermeasures (MCM)s for radiation exposure.Materials and methods To improve the MCM pipeline, we developed models of H-ARS in male Göttingen and Sinclair minipigs. Weight matched Göttingens and Sinclairs received total body irradiation (TBI; 1.50–2.10 Gy and 1.94–2.90 Gy, respectively), were observed ...
Tópico(s): PARP inhibition in cancer therapy
2020 - Taylor & Francis | International Journal of Radiation Biology
David Okech, Waylon Howard, Rebecca A. Matthew, Gregory Larkin Purser,
This study assessed the economic behaviour of 383 lower-income households in Kenya and the US. Using a two-group confirmatory factor analysis, a moderation effect of gender on financial capability by age was found in the US group. Measurement and structural equivalence across groups were established. Specifically, younger females indicated higher levels of financial capability than younger males, while older males reported higher levels of financial capability than older females. There was no such ...
Tópico(s): Gender, Labor, and Family Dynamics
2020 - Taylor & Francis | Journal of Contemporary African Studies
E. C. HYATT, J. J. Cox, Waylon Collins,
Abstract This paper identifies significant developments in the provision of bibliographic and factual data to the remote sensingcommunity. During the last decade there has been a dramatic increase in the number and type of information sources that may be accessed online. Apart from purely bibliographic sources, full text document retrieval services that outline news, legislation, space policies and commercialization are now available. In addition, information on technical parameters, components ...
Tópico(s): Satellite Image Processing and Photogrammetry
1988 - Taylor & Francis | International Journal of Remote Sensing
... Operations, edited by Irina Goldenberg, Joseph Soeters, and Waylon Dean (Cham, Switzerland: Springer International Publishing, 2017), pp. ...
Tópico(s): Intelligence, Security, War Strategy
2023 - Taylor & Francis | International Journal of Intelligence and CounterIntelligence
Janice Cleary, Ronald D. Ciancutti, James K. Skipper, John L. Smith, R. Serge Denisoff,
... Fantasy, Inc., 10th and Parker, Berkeley, CA 94710 Waylon Jennings, It's Only Rock And Roll (AH 1–4673) Waylon Jennings Jimmy Forest/Miles Davis, Live At The ...
1983 - Taylor & Francis | Popular Music & Society
George H. Lewis, Randy Blazak, Floyd Levin, Robynn J. Stilwell, Mel van Eiteren, Patrick O’Connor,
... That High Lonesome Sound. Acoustic Disc ACD 19. Waylon Jennings. Right for the Time. Justice. JR 2101– ...
Tópico(s): Music History and Culture
1998 - Taylor & Francis | Popular Music & Society