Occupational Health and Industrial Hygiene Commons^™

Racial Differences In The Impact Of A Worksite Wellness Program On Cardiovascular Biomarkers, Ceabert Joseph Griffith

Walden Dissertations and Doctoral Studies

Cardiovascular disease (CVD) is responsible for approximately 600,000 deaths in the United States each year, with African Americans (AAs) disproportionately affected. Individual-level approaches to reducing CVD remain ineffective, mobilizing a movement that advocates for population-based solutions. Workplace wellness programs (WWPs) have gained considerable traction as a viable strategy for ameliorating CVD burden among workers in general. However, no studies have looked at the efficacy of WWPs in ameliorating CVD specifically among AA employees--a knowledge gap that this investigation aimed to close. Based on the health belief model and the social cognitive theory, this retrospective cohort study used de-identified secondary data …

Self Esteem, Locus Of Control, And The Relationship With Registered Nurses' Experience With Workplace Incivility, Elizabeth Anne Berry

Walden Dissertations and Doctoral Studies

The study's purpose is evaluating the relationship between locus of control and selfesteem

in relation to the registered nurse's experience and perception with lateral and

vertical incivility. There is a lack of research concerning nurse-to-nurse incivility within

the nursing profession. The hypothesis examined whether dynamics of locus of control

and self-esteem could provide insight into the personality dynamics influencing incivility

in the workplace. This non-experimental quantitative study used 2 self-evaluation tools

and 1 demographic survey tool to collect data via Survey Monkey, a commercial data

collection company. Participants were 65 randomly selected faculty (n = 36) and

graduate students (n …

Fukushima Nuclear Disaster Response Impact On Graduate Students, Sean Eric Kil Patrick Gay

Walden Dissertations and Doctoral Studies

The roles that universities played in the response to the Fukushima nuclear disaster were significant and varied; however, there was limited study on participating graduate students. The purpose of this study was to understand the impact of disaster response on graduate students' personal and academic development. This study examined research questions about the perceived impact on academic and personal identity development. Empowerment, cognitive content engagement, general systems theory, and utilitarianism formed the theoretical foundation. This study used a transcendental phenomenological approach to examine the subjects' experiences in the context of involvement in disaster response. The primary source of data was …

Investigating The Effect Of Arsenic On Chromium(Vi)-Induced Genotoxicity In Human Lung Fibroblasts, Jason Stewart Ms

All Student Scholarship

Hexavalent chromium (Cr(VI)) compounds are well-established human lung carcinogens. Arsenic (As) is a well documented human carcinogen with long term exposure to AS in drinking water being linked to lung, kidney and liver cancer, among others. Co-exposure studies are now becoming more common as humans are not exposed to just one toxicant at a time. This is the first study to investigate the effects of co-exposure with arsenic and soluble or particulate Cr(Vi) compounds in human lung fibroblasts.

Cip10 Optimization For 4,4-Methylene Diphenyl Diisocyanate Aerosol Sampling And Field Comparison With Impinger Method, Silvia Puscasu, Simon Aubin, Yves Cloutier, Philippe Sarazin, Huu Van Tra, Sébastien Gagné

Études primaires

4,4-methylene diphenyl diisocyanate (MDI) aerosol exposure evaluation in spray foam insulation application is known as being a challenge because the spray foam application actually involves a fast-curing process. Available techniques are either not user-friendly or are inaccurate or not validated for this application. To address these issues, a new approach using a CIP10M was developed to appropriately collect MDI aerosol in spray foam insulation while being suitable for personal sampling. The CIP10M is a commercially available personal aerosol sampler that has been validated for the collection of microbial spores into a liquid medium. Tributylphosphate with 1-(2-methoxyphenyl)piperazine (MOPIP) was introduced into …

Comparison Between The Asset Ez4 Nco And Impinger Sampling Devices For Aerosol Sampling Of 4,4′-Methylene Diphenyl Diisocyanate In Spray Foam Application, Silvia Puscasu, Simon Aubin, Yves Cloutier, Philippe Sarazin, Huu Van Tra, Sébastien Gagné

Études primaires

4,4′-methylene diphenyl diisocyanate (MDI) aerosol exposure evaluation in spray foam insulation application is known to be a challenge. Current available techniques are either not user-friendly or are inaccurate or are not validated for this application. A new sampler has recently been developed to address the user-friendliness issues with other samplers: the ASSET EZ4-NCO, but the use of this sampler in spray foam insulation applications has not been demonstrated or validated. Because of this, the current work was undertaken to provide a comparison of the ASSET sampler with an impinger method, considered to be the best available method in the context …

Trunk Postural Control In Unstable Sitting: Effect Of Sex And Low Back Pain Status, Christian Larivière, Dany H. Gagnon, Hakim Mecheri

Études primaires

Background

Adequate neuromuscular control of the lumbar spine is required to prevent lumbar injuries. A trunk postural control test protocol, controlling for the influence of body size on performance, was implemented to carry out between-subject comparisons. The aim of this study was to assess the effect of sex and low back pain status with the use of two measures of trunk postural control, the first based on chair motion, and the second based on trunk motion.

Methods

Thirty-six subjects (with and without low back pain) performed three 60-s trunk postural control trials with their eyes closed while seated on an …

Obesity And Workplace Injury In Hazardous Occupations Among The Hispanic/Latino Population, Barbara Klyde

Walden Dissertations and Doctoral Studies

Over the past 20 years, adult obesity has increased in the United States, especially among the Hispanic/Latino population. In 2010, the Occupational Safety and Health Administration Environmental and Safety News, reported that younger workers, ages 18 to19 years of age, worked in the most high-risk occupations such as agriculture, construction, fishing, and manufacturing. The reported fatality rates for these occupations were 5.6 times greater for Hispanic workers compared to other race/ethnicity groups reported by the Bureau of Labor Statistics in 2013. This study determined whether obesity contributed to workplace injury or mortality in hazardous occupations, using federal, state, and independent …

An Axisymmetric Finite Element Model To Study The Earplug Contribution To The Bone Conduction Occlusion Effect, Martin K. Brummund, Franck Sgard, Yvan Petit, Frédéric Laville, Hugues Nélisse

Études primaires

An axisymmetric linear elasto-acoustic finite element (FE) model of an occluded human external ear is proposed to simulate the bone conduction occlusion effect (OE). The model consists of a cylindrical ear canal cavity surrounded by layers of biological tissues (skin, cartilage and bone) in which an earplug is inserted. Geometrical and material properties are taken from the literature. OEs are predicted for foam and silicone earplug FE-models using COMSOL Multiphysics (COMSOL®, Sweden). The FE-model is shown to predict the experimental OE measured in two healthy human reference groups wearing foam or silicone earplugs, satisfactorily. Deviations between model and experiment are …

Identification Of Intrinsic And Reflexive Contributions To Low-Back Stiffness: Medium-Term Reliability And Construct Validity, Christian Lariviere, Daniel Ludvig, Robert Kearney, Hakim Mecheri, Jean-Maxime Caron, Richard Preuss

Études primaires

This study aimed at testing the reliability and construct validity of a trunk perturbation protocol (TPP) that estimates the intrinsic and reflexive contributions to low-back stiffness. The TPP consists of a series of pseudorandom position-controlled trunk perturbations in an apparatus measuring forces and displacements at the harness surrounding the thorax. Intrinsic and reflexive contributions to low-back stiffness were estimated using a system identification procedure, leading to 12 parameters. Study 1 methods (reliability): 30 subjects performed five 75- s trials, on each of two separate days (eight weeks apart). Reliability was assessed using the generalizability theory, which allowed computing indexes of …

Sound Attenuation Performance Of Fiber-Reinforced Polymer Composite Circumaural Hearing Protection Devices, Steven Christopher Augustine

USF Tampa Graduate Theses and Dissertations

Personnel who work on the flight deck of an aircraft carrier are exposed to extreme levels of jet engine noise often in excess of 140 decibels (dB). The current circumaural hearing protective devices (CAHPD) employed by flight deck crewmen are inadequate for the level of protection required for these extreme levels of noise. Fiber-reinforced thermoset polymer composite (FRPC) materials such as aramid fibers used in body armor, have high theoretical values of acoustic impedance due to a fundamentally high modulus of elasticity and may offer a superior level of hearing protection over original equipment (OE) thermoplastic CAHPDs. The objective of …

Knowledge, Attitude And Practices Regarding Respiratory Symptoms Among Textile Workers Of Karachi, Pakistan: A Cross-Sectional Survey, Aneeta Khoso, Asaad Ahmed Nafees

Community Health Sciences

Objectives: To determine the prevalence and predictors of good knowledge, appropriate attitude and appropriate protective practices regarding respiratory symptoms among textile workers, and to determine the association of knowledge, attitude and practices with respiratory symptoms.
Methods: The cross-sectional study was conducted in 2009 and comprised male workers from 15 textile mills in and around Karachi. A structured and pre-tested questionnaire was used which included questions to explore the knowledge, attitude and practices regarding respiratory symptoms. SPSS 19 was used for statistical analysis.
Results: The study had a sample size of 372 and found prevalence of good knowledge to be in …