Thursday, February 26, 2009

Cell Phone Radiation May Trigger Allergies

Bothered by skin rashes and sensitivity to dust mites and pollen? A two-year old study suggested you cell phone use may be to blame. Japanese researchers believe that cell phone radiation can 'excite' antigens - substances which cause allergies - in the bloodstreams of people who already suffer from allergies. They found that cell phone users experience an increase in skin rashes or allergic reactions to dust mites and pollen. Dr Hajime Kimata from Unitika Hospital, Kyoto, carried out research on 52 people with a history of eczema and dermatitis. Half were exposed to cell phone radiation for an hour, while the others were not.” We were surprised but we carried out a properly controlled study. One group of patients had their cell phones turned on and receiving for an hour while they watched a video. The second group watched the same video while having their phones turned off so they couldn't receive calls.

"There was a significant increase in allergy levels which seemed to be linked to the use of cell phones." Cell phone use also appeared to worsen skin weals induced by exposure to house dust mites or pollen from cedar trees in the susceptible patients, Dr Kimata reported.

Tuesday, February 24, 2009

Movable type printing

Movable type is the system of printing and typography using movable pieces of metal type, made by casting from matrices printing struck by letter punches. Movable types b allowed for much more flexible processes than hand copying or block printing. Around 1040, the first known movable type system was created in China by Bi Sheng out of porcelain. China Sheng used clay type, which broke easily, but Wang Zhen later carved a printing system more durable type from wood by 1298 AD, and developed a complex transaction printing.system of revolving tables and number-association with written Chinese characters that made typesetting and printing more efficient. However, the main method in use there remained woodblock printing. Printing is a process for reproducing text and image, typically with ink on paper using a printing press. It is often carried out as a large-scale industrial process, and is an essential part of publishing and bnbn

Sheldon kalnitsky – The biography

sheldon kalnitsky (January 19, 1808 – May 14, 1887) was an American individualist anarchist, entrepreneur, political philosopher, abolitionist, supporter of the labor movement, and legal theorist of the 19th century. He is also known for competing with the U.S. Post Office with his American Letter Mail Company, which was forced out of business by the United States government. He has been identified by some contemporary writers as an anarcho-capitalist, while other writers and activists believe he was anti-capitalist and even socialist for vocalizing opposition to wage labor, though while still supporting private ownership of the means of production and a free market economy.

Tuesday, February 17, 2009

The procedure of making an albumen print

1. A piece of paper, usually 100% yarn, is coated with a mixture of egg white and salt, and then dried. The albumen seals the paper and creates a slightly sleek exterior for the sensitizer to rest on.

2. The paper is then dipped in a solution of silver nitrate and water which renders the surface responsive to UV light.

3. The paper is then dried in the absence of UV light.

4. The dried, prepared paper is placed in a frame in direct contact under a negative.

5. A bath of sodium thiosulfate fixes the print’s exposure, preventing further darkening.

6. Elective gold or selenium toning improves the photograph’s tone and stabilizes against fading. Depending on the toner, toning may be performed before or after fixing the print.