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Showing 741 - 760 of 83319 results
  • Prolonged Coccidioidomycosis Transmission Seasons in a Warming California A Markov State Transition Model of Shifting Disease Dynamics
    Prolonged Coccidioidomycosis Transmission Seasons in a Warming California: A Markov State Transition Model of Shifting Disease Dynamics
    Bhattachan A ;
    Camponuri SK
    2025/02/26 | National Institute for Occupational Safety and Health (NIOSH)
    Coccidioidomycosis, an emerging fungal disease in the southwestern United States, exhibits pronounced seasonal transmission, yet the influence of current and future climate on the timing and duration of transmission seasons remains poorly understood. We developed a distributed-lag Markov state transition model to estimate the effects of temperature ...
  • Is MeTime Selfish Daily Vitality Crossover in DualEarner Couples
    Is ‘Me-Time’ Selfish?: Daily Vitality Crossover in Dual-Earner Couples
    Allen TD ;
    Cho E
    2025/02/25 | National Institute for Occupational Safety and Health (NIOSH)
    This multisource daily diary study examined the recovery outcomes of working mothers' time spent for the self (i.e. me-time) and whether the benefits crossover to their husbands. Drawing on the recovery literature, we hypothesised that working mothers' me-time positively relates to their vitality. In line with the crossover theory, we expected a po ...
  • Understanding Traumatic Stress in Emergency Nurses A Systematic Review
    Understanding Traumatic Stress in Emergency Nurses: A Systematic Review
    Amberson T ;
    Quarry C
    2025/02/24 | National Institute for Occupational Safety and Health (NIOSH)
    Aims: To understand how emergency nurses experience traumatic stress and clarify the impact of traumatic stress on emergency nurses, patients, and healthcare organisations. Design: Systematic review without meta-analysis. Methods: Three hundred and eighty-three articles were screened with pre-specified criteria. Included articles represented primar ...
  • Evaluation of Alternative Chain Pillar Designs in a Deep Longwall Mine
    Evaluation of Alternative Chain Pillar Designs in a Deep Longwall Mine
    Evanek N ;
    Hicks S
    2025/02/22 | Mining Publications
    Design of chain pillars in a longwall mine setting is one of the main engineering controls on the global and local stability of the mine. Challenges with roof instabilities, floor heaves, and pillar failures can be alleviated, to some extent, by careful design of gateroad configurations and chain pillars. This work investigates three different alte ...
    Public Domain
  • Investigating Rib Brow Potential Through Monitoring in a RoomandPillar Coal Mine
    Investigating Rib Brow Potential Through Monitoring in a Room-and-Pillar Coal Mine
    Guner D ;
    Kirmaci A
    2025/02/22 | Mining Publications
    Rib brows present a significant safety hazard in underground coal mines in the United States. To address this issue, researchers at the National Institute for Occupational Safety and Health (NIOSH) and Missouri University of Science and Technology (MST) are developing a practical tool to assess both the potential of rib brow formation and the stabi ...
    Public Domain
  • Powered Air Purifying Respirator PAPR An Efficient Personal Protective Device Against Respirable Dust in Underground Mining Operations
    Powered Air Purifying Respirator (PAPR): An Efficient Personal Protective Device Against Respirable Dust in Underground Mining Operations
    Arnold B ;
    Gonzalez LS
    2025/02/22 | National Institute for Occupational Safety and Health (NIOSH)
    The health and safety of miners is critical in the industry. Prolonged exposure to dust-laden air results in irreversible ailments like pneumoconiosis that have a severe impact on their lives. Operations use various personal protective devices (PPEs) to alleviate their exposure to respirable dust. Powered Air Purifying Respirator (PAPR) is one such ...
  • Diesel Powertrains for Underground Mining Mobile Equipment
    Diesel Powertrains for Underground Mining Mobile Equipment
    Bugarski, Aleksandar D. ;
    Ritter DA Jr.
    2025/02/22 | Mining Publications
    The results of laboratory characterization of tailpipe emissions for three "clean" engines that meet U.S. EPA Tier 4 final emissions standards were used to assess the viability and effectiveness of repowering existing engines and powering new mobile equipment with those engines as a control strategy for reducing exposure of underground miners to di ...
    Public Domain
  • Videoscope Applications to Interpret Lithology in Underground Coal Mines
    Videoscope Applications to Interpret Lithology in Underground Coal Mines
    Van Dyke M ;
    Wickline J
    2025/02/22 | Mining Publications
    The understanding of coal mine roof lithology is a critical component in the determination of engineering solutions for roof control. Coreholes were the first technology available to determine lithology of the roof in reserve areas, but coreholes are typically drilled 500-2,500 ft apart due to their cost and sometimes reach more than $125,000 dolla ...
    Public Domain
  • Evaluation of Alternative Chain Pillar Designs in a Deep Longwall Mine
    Evaluation of Alternative Chain Pillar Designs in a Deep Longwall Mine
    Khademian Z ;
    Van Dyke M
    2025/02/22 | Mining Publications
    Borehole scoping has been widely used in the U.S. underground coal mines as a method for geologic mapping and stability analysis because it is very useful for identifying rock types, voids, fractures, and formation boundaries through the direct observation of the borehole wall. An image stitching technique was proposed to generate panoramic borehol ...
    Public Domain
  • Evaluating Roof Stability in an Underground Stone Mine Under High Horizontal Stress Insight from Numerical Modeling and Field Observation with Mitigation Strategy
    Evaluating Roof Stability in an Underground Stone Mine Under High Horizontal Stress: Insight from Numerical Modeling and Field Observation with Mitigation Strategy
    Evanek N ;
    Miller T
    2025/02/22 | Mining Publications
    High horizontal stress has been identified as a critical factor affecting roof stability in underground mines, particularly when the immediate roof consists of weak or laminated rock. Numerical models were employed to better understand the influence of caprock thickness, cutting sequences, and the orientation of driving direction relative to maximu ...
    Public Domain
  • A Comparison of Ground Permeability Changes Before During and After Longwall Panel MineBys Under Deep and Shallow Cover
    A Comparison of Ground Permeability Changes Before, During, and After Longwall Panel Mine-Bys Under Deep and Shallow Cover
    Addis J ;
    Harris, Marcia L.
    2025/02/22 | Mining Publications
    Shale gas wells can sometimes drill through coal reserves. Hypothetically, the caving of the gob from longwall coal mines may deform the shale gas well casing and potentially result in a breach. NIOSH researchers studied the permeability of the surrounding ground strata that may affect the potential for an inflow of gas into an underground mine env ...
    Public Domain
  • Computational Fluid Dynamics CFD Study of the Impact of Powered AirPurifying Respirators PAPR in Underground Mining Operations
    Computational Fluid Dynamics (CFD) Study of the Impact of Powered Air-Purifying Respirators (PAPR) in Underground Mining Operations
    Arnold B ;
    Gonzalez LS
    2025/02/22 | National Institute for Occupational Safety and Health (NIOSH)
    Mining operations adopt a variety of measures to combat dust underground. These include ventilation systems, water sprays, physical barriers, and personal protective equipment (PPE). Respirators are a class of PPE that can provide clean particulate-free air to the users. Powered Air-Purifying Respirators (PAPRs), used commonly in medical and other ...
  • Optimization of Fire Suppression Nozzle Location on Simulated Mobile Mine Equipment
    Optimization of Fire Suppression Nozzle Location on Simulated Mobile Mine Equipment
    Bahrami D ;
    Tang W
    2025/02/22 | Mining Publications
    The location and orientation of fire suppression nozzles is critical in suppressing mobile mine equipment fires. To effectively suppress such fires, optimization needs to be considered for the suppression nozzle locations and discharge angle. Detailed experiments were conducted to study the effectiveness of fire suppression agents with different no ...
    Public Domain
  • ThreeDimensional Ventilation Modeling of a LargeOpening Stone Mine Using COMSOL Multiphysics
    Three-Dimensional Ventilation Modeling of a Large-Opening Stone Mine Using COMSOL Multiphysics
    Gangrade V ;
    Raj KV
    2025/02/22 | Mining Publications
    Airflow in large-opening stone mines is largely dependent on the natural ventilation due to the large cross- section area of the opening. The openings of such stone mines are typically twice or thrice the size of typical underground coal or metal/nonmetal mines. Due to the influence of natural ventilation, air velocities as well as the static press ...
    Public Domain
  • Exploring the Performance and Reliability of Communication Links Subjected to Electromagnetic Interference in Radio FrequencyControlled Heavy Equipment in an Underground Coal Mine
    Exploring the Performance and Reliability of Communication Links Subjected to Electromagnetic Interference in Radio Frequency-Controlled Heavy Equipment in an Underground Coal Mine
    Girman M ;
    Zhang Y
    2025/02/22 | Mining Publications
    Wireless technologies are increasingly being implemented in underground mines for various purposes such as communications, tracking, remote control, remote sensing, and environmental monitoring. However, the adoption comes with risks as common wireless systems, such as WiFi, Bluetooth, IWT (Innovative Wireless Technologies) wireless system, often o ...
    Public Domain
  • Study of Breached Gas Mitigation in an Underground Coal Mine Using Network Modeling and Physical Model
    Study of Breached Gas Mitigation in an Underground Coal Mine Using Network Modeling and Physical Model
    Addis J ;
    Kimutis R
    2025/02/22 | Mining Publications
    Due to the surge in shale gas production, a substantial number of unconventional shale gas wells have been drilled across U.S. coal reserves. Gas breaches resulting from damaged wells pose a considerable safety risk to miners. This paper investigates how a ventilation system can effectively manage breached gas through a network-based numerical mode ...
    Public Domain
  • Enhancing Pillar Stability in a DeepCover Longwall Mine Using the LaModel Program A Comparative Analysis
    Enhancing Pillar Stability in a Deep-Cover Longwall Mine Using the LaModel Program: A Comparative Analysis
    Sears MM
    2025/02/22 | Mining Publications
    The stability of gateroad pillars is crucial in deep-cover longwall mining, especially during transitions to wider panel layouts. This study evaluates the transition from a 700-foot to a 1,000-foot panel layout with an inter-panel barrier in a deep-cover longwall mine in Southwestern Virginia to identify a configuration that enhances stability and ...
    Public Domain
  • Improving Gas Management and Ventilation Performance at Longwall Mines with Potentially High Gas Emission Rates
    Improving Gas Management and Ventilation Performance at Longwall Mines with Potentially High Gas Emission Rates
    Addis J ;
    Raj KV
    2025/02/22 | Mining Publications
    The National Institute for Occupational Safety and Health (NIOSH) is conducting research to enhance methane control and mine ventilation practices at coal mines, as a method to mitigate hazardous work conditions. NIOSH researchers conducted case studies to investigate the effectiveness of existing systems and improve performance to decrease the pot ...
    Public Domain
  • PreImplementation Evaluation of VR as a Mine Safety Training Tool
    Pre-Implementation Evaluation of VR as a Mine Safety Training Tool
    Bellanca, Jennica L. ;
    Hoebbel, Cassandra L.
    2025/02/22 | Mining Publications
    High-fidelity, immersive training is known for its learning and logistical benefits. While other industries have used virtual reality (VR) for decades, the same uptake has not been seen in mining. NIOSH recently developed an adaptable, scalable VR training platform, VR Mine Rescue Training (VR-MRT), which has attracted significant industry interest ...
    Public Domain
  • Measures and Measurement Tools for Studying Total Worker Health
    Measures and Measurement Tools for Studying Total Worker Health®
    Booth A ;
    Bray J
    2025/02/20 | National Institute for Occupational Safety and Health (NIOSH)
    Objective: Identify survey, interview, and observational measures and measurement tools to assess constructs associated with Total Worker Health® (TWH). Methods: We conducted a scoping review to identify articles that presented or evaluated measures and tools associated with worker health, safety, and well-being. We supplemented this review with a ...
741 - 760 / 83319
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