Sunday, July 29, 2007

Compact Disc

A Compact Disc or CD is an optical disc meant to store digital data, initially developed for storing digital audio. The CD, obtainable on the market in late 1982, remains the standard physical medium for commercial audio recordings as of 2007. An audio CD includes one or more stereo tracks stored using 16-bit PCM coding at a sampling rate of 44.1 kHz. Standard CDs include a diameter of 120 mm and can hold about 80 minutes of audio. There are also 80 mm discs, occasionally used for CD singles, which hold around 20 minutes of audio. Compact Disc technology was afterward modified for use as a data storage device, known as a CD-ROM, and it consist of record-once and re-writable media (CD-R and CD-RW respectively). CD-ROMs and CD-Rs stay widely used technologies in the Computer industry as of 2007.

Sunday, July 22, 2007

Red blood cell

Red cell is redirecting here, For the US military word, see Red Cell.
Red blood cells are the most ordinary type of blood cell and the vertebrate body's principal means of deliver oxygen from the lungs or gills to body tissues via the blood.

Human red blood cells Red blood cells are also known as RBCs or erythrocytes from Greek erythros for "red" and kytos for "hollow", with cyte nowadays translated as "cell". A schistocyte is a red blood cell undergoes fragmentation, or a fragmented fraction of a red blood cell.

Sunday, July 15, 2007

Multiple fruit

A multiple fruit is one fashioned from a cluster of flowers called an inflorescence. Each flower produces a fruit, but these grown-up into a single mass Examples are the pineapple, edible fig, mulberry, osage-orange, and breadfruit.

In the photograph on the right, stages of flowering and fruit development in the noni or Indian mulberry (Morinda citrifolia) can be experiential on a single branch. First an inflorescence of white flowers called a cranium is produced. After fertilization, each flower develops into a drupe, and as the drupes make bigger, they become connate (merge) into a multiple fleshy fruit called a syncarpet.

There are also many dry multiple fruits, e.g.

Tuliptree, multiple of samaras.
Sweet gum, multiple of capsules.
Sycamore and teasel, multiple of achenes.
Magnolia, multiple of follicles.

Tuesday, July 10, 2007

Water Taxi

A water taxi or river taxi or aquatically disposed taxi is a boat used for public transportation in cities with plentiful water channels. Many cities, including New York City, Boston, Baltimore, Fort Lauderdale, Winnipeg, Vancouver, London, and Tokyo have planned water taxis that operate in a similar manner to ferries or buses. Others, like Venice, have for-hire boats like to traditional taxis. Venice also has a vaporetto or waterbus system that operates in the same way to American "water taxis" (image).

Water taxis also activate in cottage areas where some cottages are available only by water. Visitors can drive to a local marina and take a water taxi to the final purpose.
On March 6, 2004, a "Seaport Taxi," a water taxi service operated by the Living Classrooms Foundation, capsized through a storm near Baltimore's Inner Harbor; 5 passengers died in the accident.