Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

For best results, stick to one search engine

13.05.2003


Web users who stick to one or two search engines and learn those well will have better results for their queries than users who try the same query or various engines, a Penn State researcher says.



"There are no wholesale rules about structuring a query that will work on multiple search engines," said Bernard J. Jansen, assistant professor of information sciences and technology (IST). "And what works on one engine, such as narrowing a query, can have the opposite effect on other search engines."

The research is detailed in the paper, "The Effects of Search Engines and Query Operators on Top Ranked Results," presented recently at IEEE’s International Conference on Information Technology: Coding and Computing." Jansen’s co-author is Caroline Eastman, Department of Computer Science and Engineering at the University of South Carolina.


The researchers’ central question was how the use of query operators or markers, such as "and," "or," "must appear" and "phrase," affected searches on three popular Web engines. Information retrieval experts argue that searches with those markers will yield better results and more relevant information, but only about one in 10 Web users write queries with those operators, Jansen said.

To determine the effectiveness of the query operators, Jansen and Eastman selected 100 queries with markers from the transaction log of a major Web search service. These were first submitted to Google, America On-Line Search (AOL) and Microsoft Search (MSN) with the top 10 results noted for comparison.

After removing the query operators, the queries were resubmitted to the search engines. If the results were different, then the query operators were doing their job of providing better results.

But on average, 60 percent to 70 percent of the results were the same whether the query had markers or not, a result that surprised him and others, Jansen said.

Furthermore, different markers yielded different results depending upon the search engine. The "or" was the only operator to significantly change the results from Google while the number of results with "must appear" returned identical results fewer times on MSN than on Google and AOL.

That’s why users who understand how best to search on one or two engines should employ them until systems designers figure out how to personalize information retrieval, Jansen said.

"We need to find something beyond Boolean markers that recognizes when someone is having term problems and that can change a phrase to something else without the user even knowing," he added. "Personalization of systems and intelligent systems would better help users."

Margaret Hopkins | EurekAlert!
Further information:
http://www.psu.edu/

More articles from Communications Media:

nachricht New cruise ship “Mein Schiff 1” features Fraunhofer 3D sound on board
05.09.2018 | Fraunhofer-Institut für Digitale Medientechnologie IDMT

nachricht Small enclosure, big sound, clear speech
31.08.2018 | Fraunhofer-Institut für Digitale Medientechnologie IDMT

All articles from Communications Media >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: New Pitt research finds carbon nanotubes show a love/hate relationship with water

Carbon nanotubes (CNTs) are valuable for a wide variety of applications. Made of graphene sheets rolled into tubes 10,000 times smaller than a human hair, CNTs have an exceptional strength-to-mass ratio and excellent thermal and electrical properties. These features make them ideal for a range of applications, including supercapacitors, interconnects, adhesives, particle trapping and structural color.

New research reveals even more potential for CNTs: as a coating, they can both repel and hold water in place, a useful property for applications like printing,...

Im Focus: Magnets for the second dimension

If you've ever tried to put several really strong, small cube magnets right next to each other on a magnetic board, you'll know that you just can't do it. What happens is that the magnets always arrange themselves in a column sticking out vertically from the magnetic board. Moreover, it's almost impossible to join several rows of these magnets together to form a flat surface. That's because magnets are dipolar. Equal poles repel each other, with the north pole of one magnet always attaching itself to the south pole of another and vice versa. This explains why they form a column with all the magnets aligned the same way.

Now, scientists at ETH Zurich have managed to create magnetic building blocks in the shape of cubes that - for the first time ever - can be joined together to...

Im Focus: A new quantum data classification protocol brings us nearer to a future 'quantum internet'

The algorithm represents a first step in the automated learning of quantum information networks

Quantum-based communication and computation technologies promise unprecedented applications, such as unconditionally secure communications, ultra-precise...

Im Focus: Distorted Atoms

In two experiments performed at the free-electron laser FLASH in Hamburg a cooperation led by physicists from the Heidelberg Max Planck Institute for Nuclear physics (MPIK) demonstrated strongly-driven nonlinear interaction of ultrashort extreme-ultraviolet (XUV) laser pulses with atoms and ions. The powerful excitation of an electron pair in helium was found to compete with the ultrafast decay, which temporarily may even lead to population inversion. Resonant transitions in doubly charged neon ions were shifted in energy, and observed by XUV-XUV pump-probe transient absorption spectroscopy.

An international team led by physicists from the MPIK reports on new results for efficient two-electron excitations in helium driven by strong and ultrashort...

Im Focus: A Memory Effect at Single-Atom Level

An international research group has observed new quantum properties on an artificial giant atom and has now published its results in the high-ranking journal Nature Physics. The quantum system under investigation apparently has a memory - a new finding that could be used to build a quantum computer.

The research group, consisting of German, Swedish and Indian scientists, has investigated an artificial quantum system and found new properties.

All Focus news of the innovation-report >>>

Anzeige

Anzeige

VideoLinks
Industry & Economy
Event News

High entropy alloys for hot turbines and tireless metal-forming presses

05.11.2019 | Event News

Smart lasers open up new applications and are the “tool of choice” in digitalization

30.10.2019 | Event News

International Symposium on Functional Materials for Electrolysis, Fuel Cells and Metal-Air Batteries

02.10.2019 | Event News

 
Latest News

AI-driven single blood cell classification: New method to support physicians in leukemia diagnostics

13.11.2019 | Life Sciences

Efficient engine production with the latest generation of the LZH IBK

13.11.2019 | Machine Engineering

Small RNAs link immune system and brain cells

13.11.2019 | Life Sciences

VideoLinks
Science & Research
Overview of more VideoLinks >>>