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Dear MR chapuis,
While search engines are a useful way to find information on the
Web, it must be remembered that they have limitations. Search engines
use 'spiders' to crawl the Web, and return results from static Web
pages. However, many bigger web sites use
dynamic web pages, which are
created in response to a specific user query, and which cannot be
found by normal search engines. These pages are known as the 'deep web' and represent an enormous
resource of approximately 500 billion documents.
(as estimated by the web site www.internets.com)
But if search engines can’t reach these pages, how do you locate
them?
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Tip
of the week:
Use Scirus to explore the 'Deep Web'.
Scirus,
the search engine for scientific information only, enables you
to locate abstracts and indexes that normal search engines don't
find. Scirus searches databases of many open and access controlled resources and is the only search engine
that searches the database of ScienceDirect, which covers 2.35
million peer-reviewed articles.
Scirus offers a unique function, where you can split search
results into web results and database results from the 'deep web'.
To
search journal and database sources only, tick the 'All journal sources' box
below the search box. Journal sources are generally peer-reviewed
and include:
- Full-text articles from ScienceDirect.
- Beilstein abstracts on Chemweb.
- Full-text articles from BioMed Central.
- MEDLINE citations on BioMedNet.
Try
this search on Scirus: |
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Tip:
Use ScienceDirect to find information from abstract databases.
Abstract
Databases are databases dedicated toward scientific publication
of material specific to a particular area of interest. They
represent a valuable source of peer-reviewed, subject-specific
information. The following Abstract Databases are available on ScienceDirect:
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- BIOSIS Previews - Fundamental life sciences, biological and biomedical research
- BIOTECHNOBASE - Biotechnology
- Beilstein Abstracts - Organic and related chemistry
- Compendex - Engineering
- EMBASE - Pharmacology and biomedicine
- Elsevier BIOBASE - Basic biological sciences
- FLUIDEX - Fluids engineering
- GEOBASE - Geology, geography and oceanography
- INSPEC - Physics, engineering, electronics and information technology
- MEDLINE - Biomedicine
- OceanBase - Marine science and technology
- PsycINFO - Psychology and behavioural sciences
- ScienceDirect Navigator - All scienceSearch
- World Textiles - Industrial and textile research
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For
more information on the Abstract Databases available from Science Direct,
and to see which databases are included in your institute subscription,
see the list of Science Direct Abstract Databases
.
List of Abstract Databases |
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Advanced tip:
Use the SD Navigator to search across all Abstract Databases
available to you on ScienceDirect.
ScienceDirect Navigator is an all-sciences bibliographic database and extremely useful to scientists searching outside a familiar scientific area and to students who prefer to search through trusted scientific sources. The database contains bibliographic information from over 7,000 leading and critically selected, peer-reviewed journals in scientific, medical, and technical fields. With the ScienceDirect Navigator database, you have the capability
to search across all the Abstract Databases available to you
on ScienceDirect using one search request.
To
perform a search in one or more of the abstract databases, click
the 'Search' button in the top navigation bar of ScienceDirect.
Then click the 'Abstract Databases' tab at the top of the search
form. Searches can be performed in either Basic or Advanced
mode in one or more of the databases available to you. When
searching the ScienceDirect Navigator database, you have the
option to restrict your search request by selecting one or more
subject categories. To broaden your search request and include
the entire collection of abstracts, select 'All Sciences' from
the 'Subjects' drop-down menu. |
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Useful
resources
Use
InvisibleWeb.com to survey the 'Invisible Web'.
The
InvisibleWeb.com is a directory of over 10,000 databases, archives,
and search engines that contain information that traditional
search engines have
been unable to access.
Click on the link below and choose the science section to see an overview of the science topics
on invisibleweb.com.
InvisibleWeb.com
Internets.com
Internets.com
provides a range of useful links to the 'deep web', including
news feeds, archives, libraries, research databases, catalogues,
and statistical data.
For
science-specific links, see the link below.
http://www.internets.com/sscience.htm
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Advanced
tip: Search for databases with traditional search engines.
While search engines may not be able to find the valuable
information residing deep within a site, they can help you
find the homepages of databases that may prove helpful for
your research.
Enter "Your subject" + "database" into a search engine such
as Google.
For example, to find subject-specific databases, use the search box below:
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Next
week: Use quick tools and a range of downloads to get
instant access to the information you need... |
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Reminder:
Already activated a ScienceDirect search alert?
To see the full list of ScienceDirect subject specific alerts please
click here.
View the summary of all topics covered in this guide, and an archive of
previous emails.
Inform someone about this Web Research Guide.
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About
ScienceDirect
ScienceDirect provides online access to more than 1,800 journals,
representing over 4 million full-text articles. Every article is
available in seamlessly linked, fully searchable html format, as
well as paginated PDF. ScienceDirect also offers a range of email
alerts, enabling you to set up personalized updates that automatically
notify you of the latest article citations, search results and journal
issues.
Find out more at ScienceDirect. |
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About
the Web Research Guide
The guide consists of ten weekly emails focused on specific areas
of web research. Each email is illustrated with subject-specific
examples so that you can start using the research tips immediately.
The tips cover a broad range of topics, from finding hidden information
online, to locating expert directories and setting up subject-specific
alerts of the latest news. The Web Research guide includes contributions
from research scientists, information professionals and search engine
specialists.
For more information about this guide, click
here. |
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You are receiving this email because you are a relation of Elsevier
and you have access to ScienceDirect via your institute.
If you don't want to receive the Web Research Guide, please click
here. Thank you!
Elsevier does not disclose or sell e-mail addresses to third parties.
Our full
privacy statement is available at ScienceDirect.
Copyright Elsevier Ltd, 2003
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