All posts by Ian Grieve

Frederick Douglass Day

Each year on February 14, Frederick Douglass‘s birthday is commemorated with a ceremony at the Frederick Douglass National Historic Site in Washington, D.C. The event features speakers on human rights, recitations of excerpts from Douglass’s speeches, music performances, and a wreath-laying ceremony. Activities, including lectures, readings from his works, and film presentations about his life, are also planned in New Bedford, in Rochester, N.Y., where Douglass’s grave is located, and in many other locations throughout the country. Discuss

Source: The Free Dictionary

Holography

Holography is the method of producing a three-dimensional image, called a hologram. A hologram is created by first splitting a laser beam. Half the beam is recorded on a plate, unaltered, and the other half is recorded after it is reflected off the object being imaged. On the recording plate, the two systems of light waves reinforce or neutralize one another, creating an interference pattern that, when illuminated by light of the same frequency, produces a hologram. Who invented holography? Discuss

Source: The Free Dictionary

Lim Festival

The Lim Festival is an alternating-song contest, held in the commune of Lung Giang, about 18 miles from Hanoi, in the Bac Ninh Province of Vietnam. This is a courtship event, in which girls and boys of different villages carry on a singing courtship dialogue. The singers take part in what is a vocal contest with set rules; one melody, for example, can only be used for two verses of the song. The storylines of the songs tell of daily events. Other Lim Festivals takes place in other villages in the province with processions and games such as human chess and wrestling. Discuss

Source: The Free Dictionary

Texting

Text messages are brief written messages exchanged between mobile phones or other mobile communications devices. Texting originated in the 1990s with the Short Message Service (SMS), a system that supports messages of up to 160 characters, and has since become a global phenomenon. With billions of texters around the world, texting has created new forms of interaction and has had a wide social impact that extends to language, crime, and politics. What was the first text message ever sent? Discuss

Source: The Free Dictionary

Hala Festival

The Hala Festival has been held in Kuwait every year since 1999 to celebrate the coming of spring and to promote Arab culture and the local economy. The festival begins with an opening carnival and parade, culminating in a lavish fireworks display. Over the course of the subsequent weeks, visitors are able to enjoy such features as performances of music from around the Middle East, exhibitions of calligraphy and cars, sporting events, and religious events. Shopping is a focal point of the festival, with more than 100 local merchants taking part in prize drawings and special offers. Discuss

Source: The Free Dictionary

Genetic Fingerprinting

Genetic fingerprinting is a forensic identification technique that enables nearly unmistakable discrimination between individuals and is often used in criminal and paternity cases. The process involves isolating DNA from skin, hair, blood, or semen cells and comparing genetic information at key positions on the chromosomes. Theoretically, the risk of a false match is minute, but laboratory errors can skew results. What other factors should be considered when evaluating DNA evidence? Discuss

Source: The Free Dictionary