Almost everyone who has used a major internet search engine has had the same experience: Search for "Dodge convertible" and 0.16 seconds later you have 4.3 million links to web pages on dodge ball, Dodge City and convertible debt instruments.
Noesis, a new semantic web search engine developed at The University of Alabama in Huntsville, won’t help you find the perfect Charger ragtop, but it is helping scientists who study the environment retrieve the research data they need. It has the potential to help scientists and researchers in many other fields perform more focused and productive searches.
"This is the first semantic scientific search tool, the first time something like this has been used for science," said Dr. Rahul Ramachandran, a research scientist in UAHuntsville's Information Technology and Systems Center.
Noesis replaces the simple word-or-phrase matching search used by most search engines with a discipline-specific semantic "ontology," or knowledge base.
Using Noesis, for instance, an aquatic botantist searching for Mobile Bay sea grass might get a list of additional terms narrowing the search based on taxonomy, location or water type, while filtering out websites offering sea grass mats, oils and lotions that leave your skin silky smooth.
Both the terminology and the structure of relationships between terms in the ontology help Noesis narrow a search to items related to the specific field of study. The algorithm might not understand the difference between tropical cyclone and Iowa State Cyclone, but it will recognize that there is a difference.
"Building an ontology is not an insignificant task," Ramachandran said. "Usually you get the experts together, then they argue and decide what concepts and information to include, and how it is organized. Then we encode it so our system can take it and use it."
While it narrows the search terms, Noesis also broadens the search by adding datasets and scientific publications not routinely included in web searches.
"There are some things you have to configure for a particular domain, such as the specific journals and major data catalogues," said Ramachandran. "It gets complicated fast."
Even in scientific circles, the semantic search has advantages: "In some datasets they might refer to one set of readings as temperature while another site might use sea surface temperature or SST. With a normal search engine you would never see one if you search for the other. What we have is the ontology that does all of that matching for you."
While the first three projects using the Noesis system are all related to meteorology or environmental science, Ramachandran says the system can be adapted to any branch of science or research.
"Everything is the same except the ontology," he said. "It can be configured to different domains for different projects. The hope for the future is there will be a growth of these small ontologies."
Dr. Rahul Ramachandran | alfa
Reversing cause and effect is no trouble for quantum computers
20.07.2018 | Centre for Quantum Technologies at the National University of Singapore
Study suggests buried Internet infrastructure at risk as sea levels rise
18.07.2018 | University of Wisconsin-Madison
A new manufacturing technique uses a process similar to newspaper printing to form smoother and more flexible metals for making ultrafast electronic devices.
The low-cost process, developed by Purdue University researchers, combines tools already used in industry for manufacturing metals on a large scale, but uses...
For the first time ever, scientists have determined the cosmic origin of highest-energy neutrinos. A research group led by IceCube scientist Elisa Resconi, spokesperson of the Collaborative Research Center SFB1258 at the Technical University of Munich (TUM), provides an important piece of evidence that the particles detected by the IceCube neutrino telescope at the South Pole originate from a galaxy four billion light-years away from Earth.
To rule out other origins with certainty, the team led by neutrino physicist Elisa Resconi from the Technical University of Munich and multi-wavelength...
For the first time a team of researchers have discovered two different phases of magnetic skyrmions in a single material. Physicists of the Technical Universities of Munich and Dresden and the University of Cologne can now better study and understand the properties of these magnetic structures, which are important for both basic research and applications.
Whirlpools are an everyday experience in a bath tub: When the water is drained a circular vortex is formed. Typically, such whirls are rather stable. Similar...
Physicists working with Roland Wester at the University of Innsbruck have investigated if and how chemical reactions can be influenced by targeted vibrational excitation of the reactants. They were able to demonstrate that excitation with a laser beam does not affect the efficiency of a chemical exchange reaction and that the excited molecular group acts only as a spectator in the reaction.
A frequently used reaction in organic chemistry is nucleophilic substitution. It plays, for example, an important role in in the synthesis of new chemical...
Optical spectroscopy allows investigating the energy structure and dynamic properties of complex quantum systems. Researchers from the University of Würzburg present two new approaches of coherent two-dimensional spectroscopy.
"Put an excitation into the system and observe how it evolves." According to physicist Professor Tobias Brixner, this is the credo of optical spectroscopy....
13.07.2018 | Event News
12.07.2018 | Event News
03.07.2018 | Event News
23.07.2018 | Health and Medicine
23.07.2018 | Earth Sciences
23.07.2018 | Science Education