Relative humidity Receiver An electronic package that converts optical signals to electrical signals Reflectance Reflectance is the ratio of power reflected to the incident power at a connector junction or other component or device, usually measured in decibels or dB Reflectance is stated as a negative value, e g , -30 dB A connector that has a better reflectance performance would be a -40 dB connector or a value less than -30 dB The terms return loss, back reflection, and reflectivity are also used synonymously in the industry to describe device reflections, but stated as positive values Repeater A device used to regenerate an optical or electrical signal to allow an increase in the system length Return Loss See Reflectance Riser Pathways for indoor cables that pass between floors It is normally a vertical shaft or space Also a fire-code rating for indoor cable ]
any of several hormones produced in the hypothalamus and carried by a vein to the anterior pituitary gland where they stimulate the release of anterior pituitary hormones; each releasing hormone causes the anterior pituitary to secrete a specific hormone
The Rh factor is an inherited blood group on red blood cells like the ABO blood types About 85% of the people in this country have it Those who have it are "Rh-positive," those who don't are "Rh-negative "
Relative humidity, a measure of moisture content in the air Moisture is crucial to many of the chemical reactions that harm photographs Reducing air moisture content can significantly extend the life of photographs However, extremely low humidity can cause irreversible physical deformation and embrittlement of photographs ISO has recommended that RH levels be kept between 30% and 50% High humidity can lead to the growth of molds on photographs or the bonding of photos to each other or surrounding scrapbook products (see Blocking)
a blood group antigen possessed by Rh-positive people; if an Rh-negative person receives a blood transfusion from an Rh-positive person it can result in hemolysis and anemia