Ergonomics. See "Human
Fall. An unintended drop to
a walkway or other surface resulting from a loss of balance.
fc. See foot candle.
fL. See foot Lambert.
Foot candle (fc). A measurement
of illuminance, in lumens per square foot.
Foot Lambert (fL). A measurement
Footwear. Anything worn on
a foot that is intended to contact the ground while walking, such as
shoes, boots, sandals and slippers.
Fovea. A small depression in
the center of the retina that has the highest density of cones and the
greatest visual acuity. The fovea has a diameter of about one to two
degrees of visual angle.
Friction. A force acting at
the interface between two objects that resists the motion or tendency
to motion of one object relative to the other. (See also Coefficient
Glare. Brightness in the field
of view that exceeds the luminance to which the observer has adapted,
and may result in annoyance, discomfort, or degraded visibility.
Handrail. A bar, pipe, or rail
that is typically grasped with a hand and used for support and guidance
along stairways, ramps, and walkways.
Hazard. Potential for an activity,
condition, or circumstance to cause injury, illness, or other damage
to people, property, or the environment.
Hertz (Hz). A measurement of
frequency, in cycles per second, in which one cycle per second equals
one Hertz. Applied to cycling phenomena such as the vibration of sound
waves or the refreshing of a video image.
Human factors. A multidisciplinary
science that studies human biological, physical, psychological, and
social characteristics and applies information about those capabilities
and limitations to the design, operation, and evaluation of tools, tasks,
procedures, and environments for safe, effective, and productive human
use. Syn. Ergonomics.
HFES. Human Factors and Ergonomics
Society. A non-profit, multidisciplinary organization of professionals
involved in the field of human factors. The Society promotes study and
dissemination of knowledge about human characteristics that are applicable
to safe, efficient, effective and productive human interaction with
tools, machines, processes and environments [HFES Web site].
Hz. See Hertz.
IIPP. See Injury and Illness
Illuminance. The amount of
light falling on a surface. Measured in units of lux (lumens per square
meter) or foot candles (fc, lumens per square foot).
Incidence rate. Rate of job-related
injuries and illnesses.
Incident. A distinct event,
often one that disrupts the normal operation or procedure.
Injury and Illness Prevention Program (IIPP). Cal-OSHA-required
safety program that must be established, implemented, and maintained
by every California employer. Program elements address responsibility,
compliance, communication, hazard assessment, accident/exposure investigations,
hazard correction, training and instruction, and record-keeping [Cal-OSHA
Interlock. Mechanism, such
as a switch, that turns off power to a machine whenever a safety device,
such as a guard, is disabled.