A technique for measuring the relative size and overlap of public Web search engines.

Enviado por admin el Lun, 12/15/2008 - 17:18.

Autor/es:

Bharat, K. and Broder, A

Resumen:

Search engines are among the most useful and popular services on the Web. Users are eager to know how they compare. Which one has the largest coverage? Have they indexed the same portion of the Web? How many pages are out there? Although these questions have been debated in the popular and technical press, no objective evaluation methodology has been proposed and few clear answers have emerged. In this paper we describe a standardized, statistical way of measuring search engine coverage and overlap through random queries. Our technique does not require privileged access to any database. It can be implemented by third-party evaluators using only public query interfaces. We present results from our experiments showing size and overlap estimates for HotBot, AltaVista, Excite, and Infoseek as percentages of their total joint coverage in mid 1997 and in November 1997. Our method does not provide absolute values. However using data from other sources we estimate that as of November 1997 the number of pages indexed by HotBot, AltaVista, Excite, and Infoseek were respectively roughly 77M, 100M, 32M, and 17M and the joint total coverage was 160 million pages. We further conjecture that the size of the static, public Web as of November was over 200 million pages. The most startling finding is that the overlap is very small: less than 1.4% of the total coverage, or about 2.2 million pages were indexed by all four engines.

Fuente:

Computer Networks and ISDN Systems archive
Volume 30 , Issue 1-7 (April 1998) table of contents
Pages: 379 - 388
Year of Publication: 1998
ISSN:0169-7552

Editor:

Elsevier

Año:

1998

Tags:

Air Yeezy

Mr. Heyward said, Air Yeezy ABC would embark on an even tougher regime of reducing corporate costs, "he ordered. Mr. Westin oversaw a reduction of 25 percent of the ABC news this year, and some employees worry that the company will move to reduce the size of further division in an effort
Nike Air Yeezy to maintain profitability.
What you need to see is who appoints ABC as the successor to Mr. Westin, Mr. Heyward said. (No names have not yet emerged as a serious competitor). A person with formal business training, as a person of the division of the ABC stations Nike Dunk SB that the most likely forecast is that the decision to manage costs in the short term, he said. Someone with a digital background as a former Air Force 1 could signal a radical and long-term approach.
"I think that whether you see someone from the Harvard Business School or Harvard dropout," said Heyward.

responder

Enviado por Anónimo el Mié, 09/08/2010 - 07:08.

http://www.finesale.net : nike shoes
http://www.nike-air-force-1.com : nike air force 1
http://www.buynikeshox.com : nike shox
http://www.airmichaeljordanshoes.com : michael jordan shoes
http://www.finesale.net : nike shox
http://www.nike-air-force-1.com : custom nike air force 1
http://www.buynikeshox.com : cheap nike shox
http://www.airmichaeljordanshoes.com : cheap jordan shoes
http://www.finesale.net : cheap nike shoes
http://www.finesale.net : nike air force 1
http://www.finesale.net : nike dunks
http://www.finesale.net : nike sb dunks
http://www.1nikeshoes.com : nike shoes

responder

Enviado por Anónimo el Mié, 09/08/2010 - 06:51.

fendi handbags

Buy the latest fendi handbags fendi shoes,free returns
up to 40% off the latest styles from fendi at luxury fendi store
high quality fendi bags for cheap sale
Shop for chanel products here. Buy Today
Up to 40% off the latest styles chanel handbags from
Shop the latest chanel bags Fall collections online
Shop the 2010 gucci Fall Winter Collection Online Today
Looking for gucci replica products
80% OFF Authentic gucci handbags Free Ship
buy miu miu handbags today
beauful miu miu bags miu miu on sale
large numbers of miu miu handbags discount
Get New Designer gucci bags for Less
Join Our luxury bags Auctions and Start Saving
luxury bags louis vuitton bag sale hot

as a luxury luxury handbags consumable
good quality lv bags online
remains one of louis vuitton bags the world
limited supply louis vuitton handbags on sale
new arrive louis vuitton bags louis vuitton bags
is symbol louis vuitton shoes of fashion
louis vuitton shop louis vuitton sale
luxury louis vuitton bags for sale
louis vuitton bags louis vuitton luxury
have large numbers of louis vuitton shoes discount
louis vuitton bag louis vuitton handbag for discount
discount louis vuitton louis vuitton discount

buy oris watches for discuont
new arrival montblanc watches on sale
wide selection of cartier watches enjoy free ship
all models omega watches omega watches for sale
in the iwc watches iwc store
brand audemars piguet watches sale
Find new christian louboutin shoes christian louboutin sale
Buy christian louboutin shoes sale today
notebook cooler 0827

responder

Enviado por Anónimo el Jue, 08/26/2010 - 08:15.

try their best to become

try their best to become world-renowned luxury brand Montblanc celebrates more than "75 Years of Passion and Soul"To this day a Rolex watch represents the pinnacle of quality and luxury fake watches Your Rolex watch will last for a long time provided that you care for it properly Following these simple steps will help you clean your Rolex watch thoroughly piaget watch Instructions Step 1 Check the crown stem and crown fake tissot cartier Screw them tight if necessary The gaskets that seal these movable external parts keep mois

responder

Enviado por Anónimo el Mié, 08/25/2010 - 04:01.

fghgj

responder

Enviado por Anónimo el Lun, 08/23/2010 - 08:40.

nike

Make you feel stylish and charming if you wear our cheap womens nike shox r4. Take action quickly ,please.
brand new nike shox shoes is our leading shoes,at the same time,the new nike shox shoes on sale now. from nike shox tl1
hope you can choose the great timberland boots of timberland chukka
By our professional service, you can buy your favorite nike shox oz from us with full confidence.
We supply nike shoes rift shoes nike shox shoes,with excellent quality and reasonable price.you can buy our cheap nike shox running shoes ,you will like it very much,because it will meet your demand.from nike shox classic
welcome to our online store to have a glance at timberland boots

responder

Enviado por Anónimo el Sáb, 08/21/2010 - 06:06.

Coach handbags

We are liking to carrying the
Coach outlet which is popular in the world and love by many people. Please don't miss the
Coach handbags Some customers do not know how many information were offered online. The
Coach OP Art Bags in the low price and elegance, convenience and style. This is the magic of Coach!
Buy
Coach Sunglasses with the discount price in the store. Usually, for an common family the
Coach Kiristin bags really is the big pending. Then the
cheap Coach bags
will become everyone's first choice.
If you want to look at this word,you will
Discount Christian Louboutin Pumps immediately notify fashion,they are
not only focus on one type of clothing.Most of the time,they will focus on the overall appearance of the consumer.Because of this,people will do everything in order to
get the best fashion,they can in the market is suitable for their needs.When it comes to fashion,wholesale fashion is beginning
Christian Louboutin heels shoesto be widely accepted in the world of
fashion design.Mainly,this is a fashion statement,give people a chance,their clothing,but have not been fashion victims.And
Christian Louboutin Sandals benefits,they also want affordable
fashion through wholesalers.Its advantage is that they provide wholesale shoes,they have a different selection of
Christian Louboutin Shoes Sale suitable for consumers.People-oriented,the
following is the type of shoes,you can find these vendors,so you will know what will happen.
Good article and thanks for sharing,i think visitors who read the article will gain something.
Do you notice the men who notice the women who wearing
Christian Louboutin Sandals
on the street, actually,
Christian Louboutin Short Boots
must be the focus in the public. You could watch your boyfriends or your husbands when you go out with them.
You may upset with them when they pay more attention to those women in sexy high heels.
Christian Louboutin tall Boots is very popular
among women .
So you should know that most men love those women wearing Manolo Blahnik sexy high heels. No matter men or women, high heels are sexy, elegant and noble.
Christian Louboutin Wedges
sale They can change women’s entire look and change your body stance, make your calf muscles more pronounced,
and force your butts and chests out — it’s nearly as if high heels force you into better posture, and good posture is always sexy.
it is sexy and simple, you will look younger in cheap Christian louboutin shoes. Christian Louboutin and are a sign of fashion for all women.
Find someting can make you noble appearance? Have a look of
christian louboutin.
It is dreaming to have a pair of
Christian Louboutin Pumps
to most women in the world who are nobility.Excellence stylist made Perfect design let you wear a feeling of sexy and elegant,also this
Yves Saint Laurent Pumps
is good choice for party,meet friend,etc.have a look of our website:
Christian Louboutin Retail. zhuyan

responder

Enviado por Anónimo el Sáb, 08/21/2010 - 00:26.

tiffanyjewellery

Back hermes bags
are absolute creations, there are some humans who are demography advantage of the huge appeal for these birkin
. There are already a lot of incidences, wherein innocent buyers are awash with affected berkin bag
.
There are numerous successful anti-obesity pills such as daidaihua
that aid pounds burning. lida slimming
makes weight loss easy and quick. Though there may be enormous companies introducing slimming capsule
. This is exactly what slimming capsules
do. Also there is no need to cut down on food while you are taking lida
regularly. lida daidaihua
detoxify your body thereby expelling all the harmful toxins in your body.
Jewelry inspired by Tiffany
hopes to copy the elegance and luxury of the original Tiffany rings
pieces but do so without the naturally high cost of diamonds and other precious stones. You should consider what you can do with a silver rings
light fixture; there is a great deal of the delicate metalwork that is so indicative of the Tiffany earrings
designs.
Chanel handbags
accept been about for absolutely some time and abide one of accepted styles of replica Chanel handbags
. China is a cogent architect of affected and Chanel handbag
.

responder

Enviado por Anónimo el Jue, 07/15/2010 - 00:51.

tiffany jewelry

On tiffany dog tag necklace the day of closing arguments cartier panthere watch in the gay marriage ban cartier replica jewelry case, Walker said it was bvlgari ring appropriate that the case was raymond weil othello wrapping up in June. longines replica

"June, after dior watch all, is the month for patek aquanaut ... " He let his jaeger master control deep voice trail off, and links of london charms smiled at the predominantly gay Bvlgari sunglasses for women courtroom. Many froze, wondering if gift wrappers he would refer to the bvlgari jewellery month in which San Francisco mahina celebrates gay pride like Mardi vuitton louis Gras. Would that be a fendi for men nod to rumors he was rolex ladies datejust gay?
Walker waited a beat longer, monogram multicolore savoring the moment. The he iwc pilot settled the suspense.

responder

Enviado por Anónimo el Jue, 08/12/2010 - 02:32.

choose you like christian louboutin shoes

Christian louboutin shoes reveals female's mature sexiness, welcome to our christian louboutin uk store to find christian louboutin sale with different colors and styles.

Do you love Nike brand, do you feel like the nike air max to look cool, a very awesome website here. Very good website where you can find the Nike Free Shoes with latest and huge style of Nike 6.0 Shoes. The Five Fingers Shoes are the best sell shoes because of its unique design and fashion style.

We also have supra shoes, supra shoes uk and GHD Hair Straightener. Choose one before sale out.

responder

Enviado por Anónimo el Sáb, 07/10/2010 - 08:35.

usive? The replica omega

usive? The replica omega unitary modifiable you regard oemga watches to serve sound is Evidenza Chronograph Mens L2.656.4.53.6-3064 which online void to omega replica watch admit your handle from. omega Once you command a cheap omega simulacre IWC disburse you omega watch proclivity to wait whereas omega speedmaster few days to end omega your diction from anywhere omega around the globe. Amatory Watches vary influence charge. appearance watches are

responder

Enviado por Anónimo el Sáb, 07/10/2010 - 01:27.

Thank you for another great

Thank you for another great article. Where else could anyone get that kind of information in such a perfect way of writing? I have a presentation next week, and I am on the look for such information.

vps hosting | hosting | ucvhost

responder

Enviado por Anónimo el Mar, 07/06/2010 - 06:18.

A court has found the

A court has found the previous owners of this website to have been selling replica chanel handbags.Anyone who jumped on burberry's flares last season will love this Spring's extremeThe designer inspired louis vuitton evidence Sunglasses are super sexy and will look great with almost everything you chose to wear.Wild-purpose bag of a href="http://www.replicahandbagscheap.com/prada-c-83.html">prada bags, all of Italy imported genuine.