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Поисковые системы, как известно, предназначены для поиска информации в разнообразых массивах данных. Как правило, поисковые системы разделяют на несколько классов, причем каждый из этих классов предназначен для решения различных задач. Поисковые каталоги Для того, чтобы как-то упростить задачу навигации по существующим ресурсам, были созданы системы, названные поисковыми каталогами или просто каталогами. Яркими представителями поисковых каталогов на Западе являются Yahoo и Open Directory, в России Mavica.net, List.ru, в Украине - Topping, UaPortal и др. В таких каталогах сайты регистрируются их создателями, после чего проходят проверку модераторами, имеющими право изменять описание и рубрику регистрируемого ресурса по собственному усмотрению так, чтобы максимально приблизить его к тематике самого сайта. Кроме того, часто модераторами также оценивается и полезность ресурса, в результате чего каждый ресурс получает экспертную оценку, которая помогает пользователям находить наиболее авторитетные сайты по интересующим их темам.
uff is becoming popular in embroidery. It is accomplished by placing one or more layers of tear-away foam on the garment before embroidery is applied. It is important to have an appropriate design and to follow a few basic guidelines: Digitizing the Design... Designs should be created specifically for Puff embroidery. A design should be done in all Satin stitches (no fill except where you don't want the design to puff up). All satin stitch columns should be at least 5-6mm wide. The open ends of letters should be closed as much as possible by rounding off the square ends of colums. If they are left open, the foam tends to stick out the end. Use minimum underlay in the areas where the foam will be added. Density will need to be increased considerably to completely cover the foam. All short stitches (those not going all the way to the edge of the column) will have to be moved in-line so that all stitches follow the same edge. Applying the Design... You will need to adjust the thread (possibly the bobbin) tension when the design is sewing. The threads should lie smoothly across the foam, but not pull up bobbin thread along the edges. Too much tension will cause foam to peek between the threads. Adding a layer of light tear-away backing or wax paper as a topping will help contain the foam. Rinse-away topping can also be used but will disappear if the garment is washed. Always pick the PantoPuff color that most closely matches the thread color and practice with a single layer of foam first. Puff creates a striking 3D images once you get used to using it. It takes practice. We carry a variety of PantoPuff colors (look under the "Topping" category
With fuel topping $2.50 per gallon, traditional cars are too thirsty and produce too much pollution. But cleaner electric, hydrogen, or fuel cell vehicles aren't quite ready for the road. Enter the hybrid engine, a new automotive technology that combines the best of both worlds: a gasoline and an electric motor. The result? The greenest thing on wheels--so far. To help you decide whether to make a hybrid your next car (or truck or SUV), we've explored the ins and outs of this burgeoning technology, then checked out the hybrid models currently on the market and those just around the bend.