Browsing by Author "Ohanehi, Donatus Chukwubueze"
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- Driving Safely in Plain CommunitiesBallin, Kirk; Grisso, Robert D.; Jepsen, S. Dee; Ohanehi, Donatus Chukwubueze; Perumpral, John V.; Pevarski, Kristen (Virginia Cooperative Extension, 2017-11-06)Discusses traffic safety issues on roadways where there are both slow and high-speed vehicles.
- Guidelines for protecting youth workers: promote safe practices and protect youth workersGrisso, Robert D.; Perumpral, John V.; Ohanehi, Donatus Chukwubueze; Goatley, Michael; Jamison, Kathleen; Sutphin, Cathy M.; Swafford, Dan; Estes, Carl (Virginia Cooperative Extension, 2012-09-10)The goal of this training guide is to reduce the number of accidents and related injuries among the youth workers serving the green industry by improving the work place safety. This training guide is prepared specifically for employers or supervisors of youth workers in the green industry. In addition to familiarizing the supervisors and employers with the regulations associated with hiring of youth workers, this guide discusses the steps they can take to make the work place safer. It also touches on the responsibilities of guardians and youth workers in improving the work place safety.
- Hand Tools Safety: Lawncare Training GuideGrisso, Robert D.; Perumpral, John V.; Ohanehi, Donatus Chukwubueze; Goatley, Michael; Jamison, Kathleen; Sutphin, Cathy M.; Swafford, Dan; Estes, Carl (Virginia Cooperative Extension, 2013-11-05)Gardening implement safety and care.
- Lawn Care: Hand Tools SafetyGrisso, Robert D.; Perumpral, John V.; Ohanehi, Donatus Chukwubueze; Goatley, Michael; Jamison, Kathleen; Sutphin, Cathy M.; Swafford, Dan; Estes, Carl (Virginia Cooperative Extension, 2013-11-05)Safety tips for operating hand tools and gardening implements
- Lawn Care: Powered Hand Tool SafetyGrisso, Robert D.; Perumpral, John V.; Ohanehi, Donatus Chukwubueze; Goatley, Michael; Jamison, Kathleen; Sutphin, Cathy M.; Swafford, Dan; Estes, Carl (Virginia Cooperative Extension, 2013-11-06)Safety tips for operating powered hand tools.
- Powered Hand Tools Safety: Lawn Care Training GuideGrisso, Robert D.; Perumpral, John V.; Ohanehi, Donatus Chukwubueze; Goatley, Michael; Sutphin, Cathy M.; Swafford, Dan; Estes, Carl (Virginia Cooperative Extension, 2014-09-24)Discusses safety issues when powered hand tools are used in lawn care.
- Powered Hand Tools Safety: Lawncare Training Guide Powered hand tool care and safe useGrisso, Robert D.; Perumpral, John V.; Ohanehi, Donatus Chukwubueze; Goatley, Michael; Jamison, Kathleen; Sutphin, Cathy M.; Swafford, Dan; Estes, Carl (Virginia Cooperative Extension, 2012-09-10)Safety tips for operating powered hand tools and gardening implements.
- Preventing Falls In and Around HomesGrisso, Robert D.; Perumpral, John V.; Ohanehi, Donatus Chukwubueze; McCoy, J. D.; Ballin, Kirk (Virginia Cooperative Extension, 2017-11-03)Discusses common causes for falls at home, and ways to help prevent these.
- Preventing Falls In and Around HomesGrisso, Robert D.; Perumpral, John V.; Ballin, Kirk; Ohanehi, Donatus Chukwubueze; McCoy, J. D. (Virginia Cooperative Extension, 2011)List of simple steps one can take to prevent falls around the house.
- Preventing Work Place FallsGrisso, Robert D.; Perumpral, John V.; Ohanehi, Donatus Chukwubueze; McCoy, J. D.; Ballin, Kirk (Virginia Cooperative Extension, 2017-11-03)Discusses common causes for falls at work, and ways to help prevent these.
- Reduction of energy losses: a key to improved rock drilling?Ohanehi, Donatus Chukwubueze (Virginia Tech, 1975)The viscous power losses of a rotary-vibratory drilling system are estimated in this study. Rotational and pure vibratory losses are considered separately. This analysis indicates that considerable power is dissipated into the drilling fluid. Pure vibratory power losses of over 3,728 W (5 hp) are expected at frequencies equal to the first mode maximum response point for a drill column that is 152.4 m (500 ft) long. This is a frequency slightly less than the first undamped natural frequency of the drill column. For the same column, viscous rotational power losses of over 74.56 W ( 0.1 hp) are expected at rotational speeds of 10.47 rad/s (100 rpm). Rotational and vibratory losses increase with increases in the length of the column, fluid viscosity, and operating frequency.
- Rotary Mowers Safety: Lawncare Training Guide Rotary mower maintenance and safe useGrisso, Robert D.; Perumpral, John V.; Ohanehi, Donatus Chukwubueze; Goatley, Michael; Jamison, Kathleen; Sutphin, Cathy M.; Swafford, Dan; Estes, Carl (Virginia Cooperative Extension, 2012-09-10)Rotary lawn mower maintenance and safe use.
- Tractor Mounted Inclined LiftsGrisso, Robert D.; Perumpral, John V.; Ohanehi, Donatus Chukwubueze (Virginia Cooperative Extension, 2013-01-08)This fact sheet provides design details for an inclined tractor lift designed specifically for placing a disabled client on the driver's seat of a Kubota L3400 tractor with a front-end loader. This design, however, can easily be altered to match similar utility tractors in the 30-75 hp range. The lift has an electric motor driven lead screw (or ball screw) as actuator to take the lift seat up and down on two inclined rails mounted in front of the rear tire on the side where steps are located.
- Tractor Mounted LiftsGrisso, Robert D.; Perumpral, John V.; Ohanehi, Donatus Chukwubueze (Virginia Cooperative Extension, 2013-01-08)Most disabled farmers are able to work if the equipment work space can be accessed without the risk of secondary injuries. One of the ATs widely used in assisting disabled workers to access a tractor or other equipment work space is a mechanical lift. These lifts are often custom designed and fabricated locally to keep the cost down, and to make it adaptable to different makes and models of tractors.
- Tractor Mounted Vertical LiftsGrisso, Robert D.; Perumpral, John V.; Ohanehi, Donatus Chukwubueze (Virginia Cooperative Extension, 2013-01-08)Description of vertical lift design for disabled farmers to use on tractors.
- Tractor Safety: Lawncare Training GuideGrisso, Robert D.; Perumpral, John V.; Ohanehi, Donatus Chukwubueze; Goatley, Michael; Jamison, Kathleen; Sutphin, Cathy M.; Swafford, Dan; Estes, Carl (Virginia Cooperative Extension, 2009-05-26)One out of three farm accidents involve tractors. This publication covers safety guidelines for tractor use on farms and in the green industry.
- Tractor-Mounted Inclined LiftsGrisso, Robert D.; Ohanehi, Donatus Chukwubueze; Ballin, Kirk (Virginia Cooperative Extension, 2018-06-22)Discusses farmers with disabilities and assistive technologies such as tractor-mounted inclined lifts that can help these farmers access and operate tractors.
- Tractor-Mounted LiftsGrisso, Robert D.; Ohanehi, Donatus Chukwubueze; Ballin, Kirk (Virginia Cooperative Extension, 2018-06-18)Discusses farmers with disabilities and assistive technologies such as lifts that can help these farmers access tractors and other farm equipment.
- Tractor-Mounted Vertical LiftsGrisso, Robert D.; Ohanehi, Donatus Chukwubueze; Ballin, Kirk (Virginia Cooperative Extension, 2018-06-22)Discusses farmers with disabilities and assistive technologies such as tractor-mounted vertical lifts that can help these farmers access and operate tractors.
- Transfer matrix analysis of an electrohydraulically driven rotary- vibratory drilling systemOhanehi, Donatus Chukwubueze (Virginia Tech, 1980)This research develops transfer matrix model for the longitudinal vibratory component of a rotary-vibratory drilling (RVD) system driven with an electrohydraulic inertial mass exciter. The RVD system is a hybrid drilling system consisting of a conventional rotary drilling system assisted by forced harmonic vibrations. The model includes a drill string with continuously distributed inertia, stiffness, internal material, and external fluid damping. These properties were introduced through a new continuum transfer matrix for a damped pipe element. The model allows for the inclusion of realistic geometrical representations for the drill string, and the inclusion of masses, springs, dashpots, and other axial structural elements. The force exerted on the drill string by the drilling fluid was included using the theory of a flat plate oscillating in a newtonian fluid. The force had an inertia and a viscous damping component. These were incorporated into the inertia and external fluid damping terms in the new continuum transfer matrix. The exciter had force and power limits. The rock-rock bit boundary was represented as a structurally damped spring.