Friday, December 18, 2009
These are exciting times in family research for all of us. There are two game changers that are worth talking about. One is DNA testing and the other is Google Books. Today I am going to talk about Google Books.
Google Book Search is a service from Google that searches the full text of books that Google scans, converts to text using optical character recognition, and stores in its digital database. The service was formerly known as Google Print when it was introduced at the Frankfurt Book Fair in October 2004. When relevant to a user's keyword search, up to three results from the Google Book Search index are displayed above search results in the Google Web Search service (google.com). A user may also search just for books at the dedicated Google Book Search service. Clicking a result from Google Book Search opens an interface in which the user may view pages from the book as well as content-related advertisements and links to the publisher's website and booksellers. Through a variety of access limitations and security measures, some based on user-tracking, Google limits the number of viewable pages and attempts to prevent page printing and text copying of material under copyright.
The Google Book Search database continues to grow. Google Book Search allows public-domain works and other out-of-copyright material to be downloaded in PDF format. For users outside the United States, though, Google must be sure that the work in question is indeed out of copyright under local laws. According to a member of the Google Book Search Support Team, "Since whether a book is in the public domain can often be a tricky legal question, we err on the side of caution and display at most a few snippets until we have determined that the book has entered the public domain.”
Many of the books are scanned using the Elphel 323 camera at a rate of 1,000 pages per hour. The initiative has been hailed for its potential to offer unprecedented access to what may become the largest online corpus of human knowledge and promoting the democratization of knowledge but it has also been criticized for potential copyright violations.
Here is a link to Google Books: http://books.google.com/bkshp?hl=en&tab=wp
Posted by Our Family at 10:05 AM
Thursday, December 17, 2009
These are exciting times in family research for all of us. There are two game changers that are worth talking about. One is DNA testing and the other is Google Books. Today I am going to talk about DNA.
DNA is an abbreviation for deoxyribonucleic acid. The shape of DNA is a double helix and all living things are made up of DNA. Friedrich Miescher first isolated DNA in 1869. The only cells in the human body that do not contain DNA are red blood cells. If the entire DNA in the human body were unwound, it would reach to the moon and back six thousand times. A single cell can contain six to nine feet of DNA. All humans share about ninety-nine percent of the same DNA sequence. It’s the remaining one tenth of a percent that makes us each unique. We all share a considerable amount of DNA with many other species. Our DNA is ninety-eight percent the same as chimpanzees’ and even fifty percent the same as bananas!
DNA makes up our genes. The environment can affect DNA and as a result, environmental factors may result in certain genes expressing or not expressing themselves. In fact, it’s believed that the majority of our genes do not express themselves. It takes about eight hours for a cell to copy its DNA. This copy process must occur before cells divide. Each inch of DNA can store twenty-five gigabytes of information. An entire sequence of DNA is known as a genome. A complete map of the human genome was finished in 2003. Mutations are changes in the DNA sequence and can be caused by exposure to things such as radiation or chemicals. These mutations may lead to an increased risk of disease including cancer. All of DNA’s functions depend on proteins.
DNA testing can also help determine a person’s risk for certain genetic diseases. Paternity tests make use of DNA to determine if a father and child’s DNA make-up are sufficiently similar. Similar tests are available to identify sibling or grandparent relationships. Modern-day forensics also relies heavily on DNA testing to determine if someone was present at a crime scene. It can also help to identify victims of crimes or accidents.
The most reliable DNA testing service is http://www.familytreeDNA.com
Posted by Our Family at 9:23 AM