38 research outputs found
Text Extraction and Web Searching in a Non-Latin Language
Recent studies of queries submitted to Internet Search Engines have shown that
non-English queries and unclassifiable queries have nearly tripled during the
last decade. Most search engines were originally engineered for English. They
do not take full account of inflectional semantics nor, for example, diacritics or
the use of capitals which is a common feature in languages other than English.
The literature concludes that searching using non-English and non-Latin based
queries results in lower success and requires additional user effort to achieve
acceptable precision.
The primary aim of this research study is to develop an evaluation methodology
for identifying the shortcomings and measuring the effectiveness of
search engines with non-English queries. It also proposes a number of solutions
for the existing situation. A Greek query log is analyzed considering the morphological
features of the Greek language. Also a text extraction experiment
revealed some problems related to the encoding and the morphological and
grammatical differences among semantically equivalent Greek terms. A first
stopword list for Greek based on a domain independent collection has been
produced and its application in Web searching has been studied. The effect of
lemmatization of query terms and the factors influencing text based image retrieval
in Greek are also studied. Finally, an instructional strategy is presented
for teaching non-English students how to effectively utilize search engines.
The evaluation of the capabilities of the search engines showed that international
and nationwide search engines ignore most of the linguistic idiosyncrasies
of Greek and other complex European languages. There is a lack of
freely available non-English resources to work with (test corpus, linguistic resources,
etc). The research showed that the application of standard IR techniques,
such as stopword removal, stemming, lemmatization and query expansion,
in Greek Web searching increases precision.
i
Preserving Cultural Heritage Using Open Source Collection Management Tools
Open source software (OSS) popularity is growing steadily and many OSS systems could be used to preserve cultural heritage objects. Such solutions give the opportunity to organizations to afford the development of a digital collection. This paper focuses on reviewing two OSS tools, CollectionSpace and the Open Video Digital Library Toolkit and discuss on how these could be used for organizing digital replicas of cultural objects. The features of the software are presented and some examples are given
Digitization and Preservation of City Landmarks Using Limited and Free Web Services
This paper presents a practical approach for digitizing city landmarks
based on free and limited Web resources. The digital replicas are then placed on
the Web using popular services, like Google earth, and are accessible to a huge
user base. The method is easily applicable and quite valuable to organizations
with limited funding
Combining Information Retrieval with Information Extraction for Efficient Retrieval of Calls for Papers
In many domains there are specific attributes in documents that carry more weight than the general words in the document. This paper proposes the use of information extraction techniques in order to identify these attributes for the domain of calls for papers. The utilisation of attributes into queries imposes new requirements on the retrieval method of conventional information retrieval systems. A new model for estimating the relevance of documents to user requests is also presented. The effectiveness of this model and the benefits of integrating information extraction with information retrieval are shown by comparing our system with a typical information retrieval system. The results show a precision increase of between 45% and 60% of all recall points. 1 Introduction Information retrieval (IR) systems, also called text retrieval systems, facilitate users to retrieve information which is relevant or close to their information needs. Even though specific words may be key attr..