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How To Choose The Perfect Engagement Ring
Women have been receiving rings as a token of betrothal practically since history began to be recorded. The earliest ones, however, were little more than a metal band and did not sport diamonds as the majority do today. The first record of a diamond ring given to celebrate an engagement dates to 1477. In that year, the Emperor Maximilian bestowed one on Mary of Burgundy, his betrothed. At the time, diamonds were so rare that only royalty and the very rich could buy them. Beginning in the eighteenth century, however, the supply began to increase. This continued into the nineteenth century, which also saw the Industrial Revolution bring more wealth to more people.
Solitaire engagement rings are the most popular variety sold. The term technically refers to a ring with a single stone, regardless of cut. However, a round cut is the most common, although there are many different ways to mount it. The round cut is considered to be optimal for enhancing the reflective properties of a diamond.
A trilogy setting is a common variant of the solitaire. These have a larger stone in the center and a smaller gem on either side. While these may all be diamonds, in the last few decades jewelers have produced several variations. The center gem can be an emerald, ruby, or sapphire, or a birthstone can sometimes be used.
Many modern brides long for an antique engagement ring. Since they only have to be more than 50 years old to qualify, the majority are diamond rings quite similar to modern ones. However, during the twenties and thirties, the art deco movement led to the design of some novel mounts and the use of colorful stones. Rings that are older than a century or so may not even have any diamonds at all, especially those that date back to the 1600s and earlier. Most of the rings of this age use other gems, and many also have very elaborate mountings.
Over the past few decades, princess cut engagement rings have grown increasingly popular. This cut features a flat top and is square in shape. Sometimes that are recessed into the band, but more often they are mounted with the prongs covering the stone's corners.
Emerald cut stones are rectangular in shape. Typically they have facets along each side and a top that is flat. The marquis stone is fairly round, but it will taper into a point at each end. Pear shaped cuts are rounded at one end and sharply pointed on the other end. They are more often made into pendants, earrings, or set among additional stones since their shape is not considered an attractive solitaire.
It should come as no surprise that some of the modern ideas about diamonds are the result of advertising campaigns by jewelers. For example, the notion that a prospective groom spend two to three months' salary on an engagement ring was a promotion by a major American jeweler. Nevertheless, diamonds have remained the most popular precious gem, and most women prefer diamond engagement rings. Size, cut, and mountings may, however, vary a great deal. But now that diamonds are plentiful, varied, and affordable, almost everyone can achieve her goal.
What is the difference between the protocols ethernet, token ring, fddi, and wi-fi?
There are two basic schemes for computers to communicate.
The first is collision based protocols. In a collision based protocol you transmit data when you need to. If someone else needs to at the same time both sets of data get garbled. If corrupt data is detected each sender waits a random time and tries again. This works good unless the system is heavily loaded, in which case many collisions occur and very little data gets through. Ethernet and Wi-fi are collision based schemes. The differences are that one is wired and one is not. Also each encodes the data differently.
The second type of communication scheme is a token based system. In a token based system you can only talk when you have the "token". The token is a permission that is passed from computer to computer. You can only hold the token for a fixed time before you need to pass it on to the next guy. This means that when you need to transmit you will not have a collison cause only you can transmit at that time. However, since you have to wait for the token to come to you, you may not be able to transmit all your stuff as soon as you would like. In a heavily loaded system token based schemes garauntee that at least some data gets through. For applications that require repeatable performance, for example industrial machine control type applications, token based schemes are common. Fddi and token ring are examples, the differences being how the tokens are generated and passesd and how the data is encoded.
Thanksgiving Makes Way to Presents and Pepper Spray (thepoliticker.observer)
The ever-fashionable Lady Gaga, umbrella ensemble and all.
Do you hear those sleigh bells ring-a-ling too? Every year we think we’re
going crazy when the radio starts playing Christmas songs the moment the
organic Whole Foods turkey has turned to Thanksgiving leftovers. (It’s been
especially unnerving this year, considering the temperature has us repacking
our winter sweaters.) We’re happy to get an early jump on the
shopping—er—_giving_ this year, as long it means that we can stuff our
stockings with toys from **Lady Gaga**’s workshop at Barneys. Only $95 for an
**Alexander McQueen** shoe replica made out of chocolate? That’s less than we
paid at the Met to see the reel heel! Another holiday treat has been the
silence on Wall Street. Maybe everyone made peace on Thanksgiving … you know,
just like the Pilgrims and Indians did before the former wiped out the
indigenous culture with smallpox. (Zuccotti Lung, anyone?) Those annoying
drum-a-drum-drum circles were quickly replaced by **Miley Cyrus**’s YouTube
remix of her song “Liberty Walk” to show her support of the protests.
Listening to her high-frequency noises accompanied by images of marches and
American flags was like taking a little Salvia trip without ...
ETHERNET AND TOKEN RING TOPOLOGY
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