Sailing as a sport involves a variety of competitive sailing formats that are sanctioned through various sailing federations and yacht clubs. Racing disciplines include matches within a fleet of sailing craft, between a pair thereof or among teams. Additionally, there are specialized competitions that include setting speed records. Racing formats include both closed courses and point-to-point contests; they may be in sheltered waters, coast-wise or on the open ocean. Most competitions are held within defined classes or ratings that either entail one type of sailing craft to ensure a contest primarily of skill or rating the sailing craft to create classifications or handicaps.
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Thursday, May 31, 2018
Tuesday, May 22, 2018
IRREGULAR VERBS
INFINITIVE PAST SIMPLE PAST PARTICIPLE
Be Was/were been
Become became become
begin began begun
Break broke broken
Build built built
Buy bought bought
Can could
Catch caught caught
Come came come
Do did done
Drink drank drunk
Eat ate eaten
fall fell fallen
find found found
get got got
get up got up got up
give gave given
go went gone/been
have had had
hide hid hidden
know knew known
learn learnt learned
leave left left
lose lost lost
make made made
meet met met
find found found
get got got
get up got up got up
give gave given
go went gone/been
have had had
hide hid hidden
know knew known
learn learnt learned
leave left left
lose lost lost
make made made
meet met met
Monday, May 21, 2018
Thursday, May 17, 2018
THREE MARKETS IN LONDON
- CONVENT GARDEN: Today it is the only place of London lincensed for street art entrtaiment,the marke wass establiced in 1671 by Charles II, the name was by the 13th century monastery garden, Royal opera house, flowers.
- PORTOBELLO ROAD MARKET: there are stalls of antiquis its all of second hand made it has a lot of tourists.
- CANDEMTWON: Rock and punk stile, lots of street art paintings on walls and sculptures.
Wednesday, May 9, 2018
Saturday, May 5, 2018
egyptian blue
EGYPTIAN BLUE.
description of Egyptian blue:
Very stable synthetical pigment of varying blue colour. It is a copper calcium silicate that was the first synthetic pigment and the most extensively used from the early dynasties in Egypt until the end of the Roman period in Europe. Many specimens, well over 3000 years old, appear to be little changed by the time. The new life of Egyptian blue.
Egyptian blue could find use in the modern era in applications such as biomedical analysis, telecommunications, and lasers, according to a new report (2009). A quantitative study of the pigment luminescence properties assesses its quantum efficiency and lifetime. It was found that Egyptian blue has an exceptional high luminescence quantum yield for a molecular-level infrared emitter. Egyptian blue's long luminescence lifetime and intense IT emission make it a promising candidate for use in biomedical application, for example, because IR photons can deeply penetrate human tissue and the pigment's emission at 910 nm minimizes light absorption by tissues. Furthermore, the pigment is extremely stable, exhibiting bright luminescence even after millennia. Ancient Egyptians may not have gained eternal life but one of their most frequently used pigments may now have a future in a variety of high-tech applications.
Pigments in Pastels.
What is Pastel?
Pastels are usually in stick form, similar to chalk. A pastel stick consists of pure powdered pigment and an inert binder, such as gum arabic, gum tragacanth, or methyl cellulose. Pastels have a higher pigment concentration than any other artist medium (hence the rich, luminous colors that pastels can achieve). The powdered pigments used in pastels are similar to those found in oil paints.
how do you make this?
(A) Place powdered gum tragacanth into a glass jar, add water and mix to dissolve. The ratio is typically 1 part gum tragacanth to 30 parts water. Close the jar and refrigerate it for at least 48 hours. The mixture will become a gelatinous solution. (B) Place powdered pigment on a glass palette. Make a hole in the middle of the pile of pigment. Pour a very small amount of the gum tragacanth solution into the center of the pigment. Using a palette knife, mix the pigment and the gum tragacanth solution. (C) If necessary, add more gum solution. Mix thoroughly until the mixture reaches a doughy consistency. (D) To make a lighter shade of blue, add a pile of white pigment to the remaining blue pastel. Add a small amount of gum tragacanth, and repeat the mixing process. (E) Mold the doughy pastel into a stick form. Place the pastel on absorbent paper, such as a paper towel. Allow the pastel to dry (typically 24-48 hours). You can create your pastels in any shape that you want, depending on what you might want to use it for. (F) The dried pastels and the marks that they make on abrasive paper.
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