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Showing 1561 - 1580 of 83631 results
  • Analysis of Rib Bolt Load and Its Impact on Stabilizing Coal Pillar Ribs Using Numerical Simulations
    Analysis of Rib Bolt Load and Its Impact on Stabilizing Coal Pillar Ribs Using Numerical Simulations
    Mohamed K ;
    Xue Y
    2024/07/22 | Mining Publications
    Rib control is a critical component of underground coal mining operations, and comprehensive rib support design is essential for ensuring the safety of miners. However, there is currently no standardized approach for rib support design in the United States. To tackle this issue, the National Institute for Occupational Safety and Health (NIOSH) has ...
    Public Domain
  • Seismic Potential Forecasting in a Deep Longwall Mine
    Seismic Potential Forecasting in a Deep Longwall Mine
    Agioutantis Z ;
    Beale J
    2024/07/22 | Mining Publications
    Seismic events can be induced by mining due to unstable rock failures or slips along geologic structures leading to the sudden release of strain energy stored within the rock near underground openings. Depending on their intensity and proximity to the working area, seismic events may raise safety concerns, and thus the forecasting of the seismic po ...
    Public Domain
  • From Points to Lines to Surfaces A Novel Approach to Reconstructing FieldScale ThreeDimensional Shale Roof Models Using Image Processing
    From Points to Lines to Surfaces: A Novel Approach to Reconstructing Field-Scale Three-Dimensional Shale Roof Models Using Image Processing
    Li X ;
    Ruan M
    2024/07/22 | Mining Publications
    Most coal mine roofs in the Appalachian region consist of laminated shale, which is prone to brittle failure. Accurate modeling of shale roofs is vital for studying cutter failures of these shale roofs, and ordinary and formational bedding planes play a significant role in the response of the shale roof to mining-induced stresses. This paper presen ...
    Public Domain
  • NIOSH Gas Well Stability Research A Summary of Ground Control Engineering Considerations
    NIOSH Gas Well Stability Research: A Summary of Ground Control Engineering Considerations
    Kim B ;
    Su D
    2024/07/22 | Mining Publications
    This paper summarizes significant findings from the ongoing NIOSH Gas Well Stability research over the past decade; in particular, the important ground control engineering considerations. Longwall-induced surface and subsurface deformations may induce gas well casing deformations and stresses, depending on a few parameters such as overburden depth, ...
    Public Domain
  • A Case Study of Path Dependent Calibration and Pillar Stability Analysis Using the LaModel Program
    A Case Study of Path Dependent Calibration and Pillar Stability Analysis Using the LaModel Program
    Sears MM
    2024/07/22 | Mining Publications
    The LaModel program is widely used to calculate stresses and displacements on thin tabular deposits, particularly when multiple seams or complex mining geometry is encountered. The program itself allows the user to create multiple mining steps to show a progressive sequence of mining. However, LaModel considers each individual step as an independen ...
    Public Domain
  • 3DEC Investigation of the Highly Anisotropic Strengths of a Utah Coal Using Discrete Fracture Networks
    3DEC Investigation of the Highly Anisotropic Strengths of a Utah Coal Using Discrete Fracture Networks
    Kim BH ;
    Larson, Mark K.
    2024/07/22 | Mining Publications
    Although techniques and practices of mining are highly advanced, coal pillar bursts or bumps continue to occur. Many uncertainties remain because of the highly anisotropic characteristics of coal seams that are associated with geologic structure and the mining-induced spatial redistribution of stress in coal pillars. Thus, to prevent fatalities in ...
    Public Domain
  • Investigating the Influence of Lateral Loading on the Vertical Capacity of Coal Mine Standing Supports
    Investigating the Influence of Lateral Loading on the Vertical Capacity of Coal Mine Standing Supports
    Batchler, Timothy ;
    Mohamed K
    2024/07/22 | Mining Publications
    The National Institute for Occupational Safety and Health (NIOSH) initiated a testing program to assess the effects of lateral loading on various standing supports used in underground coal mines. This study is not intended to endorse a particular type of standing supports nor to provide a comparison between different types of standing supports. Thi ...
    Public Domain
  • Associations of a Toenail Metal Mixture with Attention and Memory in the Gulf LongTerm FollowUp GuLF Study
    Associations of a Toenail Metal Mixture with Attention and Memory in the Gulf Long-Term Follow-Up (GuLF) Study
    Buckley JP ;
    Dickerson AS
    2024/07/20 | National Institute for Occupational Safety and Health (NIOSH)
    Background: Research on metal-associated neurodegeneration has largely focused on single metals. Since metal exposures typically co-occur as combinations of both toxic and essential elements, a mixtures framework is important for identifying risk and protective factors. This study examined associations between toenail levels of an eight-metal mixtu ...
    Peer Reviewed
  • Construction Injury Narrative Teen Worker Loses Legs to Trencher 2024
    Construction Injury Narrative: Teen Worker Loses Legs to Trencher [2024]
    Washington (State). Department of Labor and Industries
    2024/07/18 | Fatality Assessment and Control Evaluation Reports (FACE)
    A 16-year-old construction worker had both legs amputated when they were caught in a trencher. He was a high school student in a work-based learning program that allowed him to earn credit and gain job experience. He worked for his employer, a large general contractor, around nine months. The teen was using a walk-behind mini skid steer with a hydr ...
  • Evaluating Scanning Electron Microscopy for the Measurement of SmallScale Topography
    Evaluating Scanning Electron Microscopy for the Measurement of Small-Scale Topography
    Beschorner KE ;
    Chadha V
    2024/07/15 | National Institute for Occupational Safety and Health (NIOSH)
    For predicting surface performance, multiscale topography analysis consistently outperforms standard roughness metrics; however, surface-characterization tools limit the range of sizes that can be measured. Therefore, we evaluate the use of scanning electron microscopy (SEM) to systematically measure small-scale topography. While others have employ ...
    Peer Reviewed
  • Expanding Environmental Care Competencies for Future and Current Healthcare Providers
    Expanding Environmental Care Competencies for Future and Current Healthcare Providers
    Keating SA ;
    Klar RT
    2024/07/15 | National Institute for Occupational Safety and Health (NIOSH)
    The multiple impacts of the environment on the health of populations can oftentimes be clouded by the daily care practices of healthcare providers. This case study describes an innovative graduate level elective course that uses a problem-based approach to apply evidence-based principles of environmental health to the care of populations. Initial i ...
    Peer Reviewed
  • Testing the Shock Protection Performance of Type I Construction Helmets Using Impactors of Different Masses
    Testing the Shock Protection Performance of Type I Construction Helmets Using Impactors of Different Masses
    Pan, Christopher S. ;
    Ronaghi M
    2024/07/12 | National Institute for Occupational Safety and Health (NIOSH)
    BACKGROUND: Wearing protective helmets is an important prevention strategy to reduce work-related traumatic brain injuries. The existing standardized testing systems are used for quality control and do not provide a quantitative measure of the helmet performance. OBJECTIVE: To analyze the failure characterizations of Type I industrial helmets and d ...
    Public Domain Peer Reviewed
  • Quantification of Mechanical Behavior of Rat Tail Under Compression
    Quantification of Mechanical Behavior of Rat Tail Under Compression
    Dong, Ren G. ;
    Krajnak, Kristine M.
    2024/07/12 | National Institute for Occupational Safety and Health (NIOSH)
    BACKGORUND: The development of vibration-induced finger disorders is likely associated with combined static and dynamic responses of the fingers to vibration exposure. To study the mechanism of the disorders, a new rat-tail model has been established to mimic the finger vibration and pressure exposures. However, the mechanical behavior of the tail ...
    Public Domain Peer Reviewed
  • Exploring the Role of Silica Exposure in the Aetiology of Interstitial Lung Disorders
    Exploring the Role of Silica Exposure in the Aetiology of Interstitial Lung Disorders
    Calvert, Geoffrey M. ;
    Fishwick D
    2024/07/10 | National Institute for Occupational Safety and Health (NIOSH)
    The paper by Iversen and colleagues in this issue of Occupational and Environmental Medicine provides interesting insights into the potential contribution of inhaled respirable crystalline silica (RCS) in the development of idiopathic interstitial lung disorders and sarcoidosis. It also interestingly showed an association between low levels of cumu ...
    Public Domain
  • Combining Nontargeted Analysis with ComputerBased Hazard Comparison Approaches to Support Prioritization of Unregulated Organic Contaminants in Biosolids
    Combining Nontargeted Analysis with Computer-Based Hazard Comparison Approaches to Support Prioritization of Unregulated Organic Contaminants in Biosolids
    Lyu Q ;
    Nachman KE
    2024/07/09 | National Institute for Occupational Safety and Health (NIOSH)
    Biosolids are a byproduct of wastewater treatment that can be beneficially applied to agricultural land as a fertilizer. While U.S. regulations limit metals and pathogens in biosolids intended for land applications, no organic contaminants are currently regulated. Novel techniques can aid in detection, evaluation, and prioritization of biosolid-ass ...
    Peer Reviewed
  • Moral Injury Among Healthcare Workers on the Frontlines of the COVID19 Crisis Developing a Blueprint for Awareness Prevention and Mitigation
    Moral Injury Among Healthcare Workers on the Frontlines of the COVID-19 Crisis: Developing a Blueprint for Awareness, Prevention, and Mitigation
    Purcell NJ
    2024/07/09 | Grant Final Reports
    Moral injury is lasting psychological and spiritual distress that stems from violating one's values or feeling betrayed by a trusted institution or authority. Moral injury is associated with post-traumatic stress (PTSD), depression, anxiety, substance use, functional impairments, and suicide risk. Healthcare workers whose jobs put them in high-stak ...
  • NextGeneration CustomFit Reusable Respiratory Protective Device with Continuous Fit Monitoring Part II Continuous Fit Monitoring
    Next-Generation Custom-Fit Reusable Respiratory Protective Device with Continuous Fit Monitoring – Part II: Continuous Fit Monitoring
    Bergman, Michael ;
    Jayaraman S
    2024/07/03 | National Institute for Occupational Safety and Health (NIOSH)
    Filtering facepiece respirators (FFRs) are manufactured in discrete sizes, with some models being limited in accommodating the fit of some sex and race combinations. This study presents the development of a custom-fit respiratory protective device (RPD) which conforms to a user's facial features and flexes and moves with facial movements during use ...
    Public Domain Peer Reviewed
  • NextGeneration CustomFit Reusable Respiratory Protective Device with Continuous Fit Monitoring Part I CustomFit Design
    Next-Generation Custom-Fit Reusable Respiratory Protective Device with Continuous Fit Monitoring – Part I: Custom-Fit Design
    Bergman, Michael ;
    Jayaraman S
    2024/07/03 | National Institute for Occupational Safety and Health (NIOSH)
    Filtering facepiece respirators (FFRs) are manufactured in discrete sizes, with some models being limited in relation to accommodating the fit of some sex and race combinations. This study presents the development of a custom-fit respiratory protective device (RPD) which conforms to a user's facial features and flexes and moves with facial movement ...
    Public Domain Peer Reviewed
  • Exposure to Emissions Generated by 3Dimensional Printing with Polycarbonate Effects on Peripheral Vascular Function Cardiac Vascular Morphology and Expression of Markers of Oxidative Stress in Male Rat Cardiac Tissue
    Exposure to Emissions Generated by 3-Dimensional Printing with Polycarbonate: Effects on Peripheral Vascular Function, Cardiac Vascular Morphology and Expression of Markers of Oxidative Stress in Male Rat Cardiac Tissue
    Burns D ;
    Farcas M
    2024/07/02 | National Institute for Occupational Safety and Health (NIOSH)
    Three-dimensional (3D) printing with polycarbonate (PC) plastic occurs in manufacturing settings, homes, and schools. Emissions generated during printing with PC stock and bisphenol-A (BPA), an endocrine disrupter in PC, may induce adverse health effects. Inhalation of 3D printer emissions, and changes in endocrine function may lead to cardiovascul ...
    Public Domain Peer Reviewed
  • Development of Innovative Composite Nanofiber Enhancing Polyamide6 with EPolyLLysine for Medical and Protective Textiles
    Development of Innovative Composite Nanofiber: Enhancing Polyamide-6 with E-Poly-L-Lysine for Medical and Protective Textiles
    Li R ;
    Purandare S
    2024/07/02 | National Institute for Occupational Safety and Health (NIOSH)
    Polyamide-6 (PA) is a popular textile polymer having desirable mechanical and thermal properties, chemical stability, and biocompatibility. However, PA nanofibers are prone to bacterial growth and user discomfort. e-Poly-L-lysine (PL) is non-toxic, antimicrobial, and hydrophilic but lacks spinnability due to its low molecular weight. Given its simi ...
    Peer Reviewed
1561 - 1580 / 83631
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