Those creatures that naturally thrive in high atmospheric humidities.

A glacial anticyclone believed to overlie Antarctica.

A weak high appearing on mean charts of sea-level pressure over the Arctic Basin during late spring, summer, and early autumn.

An intracardiac electrogram which records electrical potentials within the upper region of the right upper chamber of the heart that receives blood from the veins and forces it into the lower part of the heart that moves blood to the rest of the body, obtained by the introduction of electrodes high in the upper part of the heart near the sinus node or the small mass of specialized cardiac muscle fibers located in the back wall of the right upper space of the heart: The atrial electrogram is used in localizing conduction blocks or delays in the normal flow of electrical impulses which cause the heart to beat and diagnosing arrhythmias or abnormal rates or rhythms, of the heart.

1. Heating which is generated by a radio-frequency power source, that produces a radio-frequency current.
2. Heating with radio-frequency current that is produced by an electron-tube oscillator or an equivalent radio-frequency power source.
3. A method of heating a material by inducing a high-frequency current into it or having the material act as the dielectric (having little or no ability to conduct electricity) between two plates charged with a high-frequency current.

1. A process in which an electrostatic separator sorts out or reorders a mixture of finely pulverized materials.
2. A separation of finely pulverized materials by placing them in electrostatic separators.

1. From three MHz to 30 MHz. HF RFID tags typically operate at 13.56 MHz. 2. Tags that operate between three and 30 MHz.

Electrophoresis, often using paper as a support to the solution, in which a high potential, often a few kilovolts, is used.

Electrophoresis is the motion of charged particles in a colloid (mixture in which one substance is divided into minute particles, called colloidal particles, and dispersed throughout a second substance) under the influence of an electric field. Particles with a positive charge go to the cathode and negative charge to the anode.

Existing in haloid soils that have a high salt content and concentrated solutions.

The rare-earth elements (REE) form the largest chemically coherent group in the chemical periodic table.

Although they are generally unfamiliar, the rare-earth elements are essential for many hundreds of applications.

The versatility and specificity of the rare-earth elements have given them a level of technological, environmental, and economic importance considerably greater than might have been expected from their relative obscurity.

As technological applications of rare-earth elements have multiplied over the past several decades, demand for several of the less abundant (and formerly quite obscure) REE has increased dramatically.

Some of the Applications of the Rare-Earth Elements

• Color cathode-ray tubes and liquid-crystal displays used in computer monitors and televisions employ europium as the red phosphor and no substitute is currently known.
• Fiber-optic telecommunication cables provide much greater bandwidth than the copper wires and cables they have largely replaced.
• Fiber-optic cables can transmit signals over long distances because they incorporate periodically spaced lengths of erbium-doped fiber that function as laser amplifiers because it alone possesses the required optical properties.
• Permanent magnet technology has been revolutionized by alloys containing neodymium, samarium, gadolinium, dysprosium, or praseodymium.
• Small, lightweight, high-strength rare-earth element magnets have allowed miniaturization of numerous electrical and electronic components used in appliances, audio and video equipment, computers, automobiles, communications systems, and military gear.
• Several rare-earth elements are essential constituents of both petroleum fluid cracking catalysts and automotive pollution-control catalytic converters.
• Although more expensive, lanthanum-nickel-hydride batteries offer greater energy density, better charge-discharge characteristics, and fewer environmental problems when they are recycled or disposed of.
• The rare earth elements are essential for a diverse and expanding array of high-technology applications, which constitute an important part of the industrial economy of the United States.
• Long-term shortages or unavailability of rare-earth elements would force significant changes in many technological aspects of American life.
• State-run Chinese firms sharply expanded production and slashed prices of rare earths in the 1990's, forcing producers in the United States (previously the world’s leading producer and exporter) and elsewhere out of the market which no doubt will change now that China has restricted its exports of rare-earth minerals.

A secondary educational facility that typically consists of the highest grade levels of 10, 11, and 12 or 9, 10, 11, and 12: Shirley Jones was teaching English classes at the local senior high school which consisted of two 11th grade classes and three classes of 10th grade students.

From 300 MHz to 3 Ghz. Typically, RFID tags that operate between 866 MHz to 960 MHz.

They can send information faster and farther than high-frequency and low-frequency tags, but radio waves don’t pass through items with high water content; such as, fruit, at these frequencies.

UHF tags are also more expensive than low-frequency tags, and they use more power.