All of DSpace

Browsing by Subject "Search engines"

Now showing items 1-20 of 25

    • An automatic multi-agent web image and associated keywords retrieval system 

      Papadakis, N.; Ntalianis, K.; Doulamis, A.; Stamoulis, G. (2009)
      Web-based image search engines and CBIR techniques are blind to the actual content. As a result querying for a specific object is often cluttered with irrelevant data, leading to low precision. Furthermore recall rates are ...

    • Big spatial and spatio-temporal data analytics systems 

      Velentzas P., Corral A., Vassilakopoulos M. (2021)
      We are living in the era of Big Data, and Spatial and Spatio-temporal Data are not an exception. Mobile apps, cars, GPS devices, ships, airplanes, medical devices, IoT devices, etc. are generating explosive amounts of data ...

    • A comparison of distributed spatial data management systems for processing distance join queries 

      García-García F., Corral A., Iribarne L., Mavrommatis G., Vassilakopoulos M. (2017)
      Due to the ubiquitous use of spatial data applications and the large amounts of spatial data that these applications generate, the processing of large-scale distance joins in distributed systems is becoming increasingly ...

    • Computing scientometrics in large-scale academic search engines with MapReduce 

      Akritidis, L.; Bozanis, P. (2012)
      Apart from the well-established facility of searching for research articles, the modern academic search engines also provide information regarding the scientists themselves. Until recently, this information was limited to ...

    • Diversifying the legal order 

      Koniaris M., Anagnostopoulos I., Vassiliou Y. (2016)
      “Public legal information from all countries and international institutions is part of the common heritage of humanity. Maximizing access to this information promotes justice and the rule of law.” In accordance with the ...

    • Effective Unsupervised Matching of Product Titles with k-Combinations and Permutations 

      Akritidis L., Bozanis P. (2018)
      The problem of matching product titles is of particular interest for both users and marketers. The former, frequently search the Web with the aim of comparing prices and characteristics, or obtaining and aggregating ...

    • An efficient algorithm for bulk-loading xBR+-trees 

      Roumelis G., Vassilakopoulos M., Corral A., Manolopoulos Y. (2018)
      A major part of the interface to a database is made up of the queries that can be addressed to this database and answered (processed) in an efficient way, contributing to the quality of the developed software. Efficiently ...

    • Efficient distance join query processing in distributed spatial data management systems 

      García-García F., Corral A., Iribarne L., Vassilakopoulos M., Manolopoulos Y. (2020)
      Due to the ubiquitous use of spatial data applications and the large amounts of such data these applications use, the processing of large-scale distance joins in distributed systems is becoming increasingly popular. Distance ...

    • ENORASI Assistive Computer Vision-based System for the Visually Impaired: A User Evaluation Study 

      Mitsou A., Koutsiou D.-C.C., Diamantis D.E., Psallidas T., Dimas G., Vasilakakis M., Kalozoumis P., Spyrou E., Perantonis S.J., Krukowski A., Iakovidis D.K. (2022)
      Visual impairment affects a significantly large number of individuals and in many cases it may disturb their daily life. This study presents a novel prototype wearable device which aims to assist them in tasks such as ...

    • Evaluation of diversification techniques for legal information retrieval 

      Koniaris M., Anagnostopoulos I., Vassiliou Y. (2017)
      "Public legal information from all countries and international institutions is part of the common heritage of humanity. Maximizing access to this information promotes justice and the rule of law". In accordance with the ...

    • The EvoGen benchmark suite for evolving RDF data 

      Meimaris M., Papastefanatos G. (2016)
      Artificial and synthetic data are widely used for benchmarking and evaluating database, storage and query engines. This is usually performed in static contexts with no evolution in the data. In the context of evolution ...

    • Improved retrieval effectiveness by efficient combination of term proximity and zone scoring: A simulation-based evaluation 

      Akritidis, L.; Katsaros, D.; Bozanis, P. (2012)
      During the past few years, the commercial Web search engines have augmented their underlying index structures by significantly enriching the information which describes the appearance of a word within a document Dean (2009) ...

    • MirPub v2: Towards ranking and refining miRNA publication search results 

      Kanellos I., Vlachokyriakou V., Vergoulis T., Georgakilas G., Vassiliou Y., Hatzigeorgiou A.K., Dalamagas T. (2015)
      In recent years, many articles studying microRNA (miRNA) molecules and their connection to diseases have been published. However, the wide range of literature in life sciences, raises a barrier in extracting useful information ...

    • Positional data organization and compression in web inverted indexes 

      Akritidis, L.; Bozanis, P. (2012)
      To sustain the tremendous workloads they suffer on a daily basis, Web search engines employ highly compressed data structures known as inverted indexes. Previous works demonstrated that organizing the inverted lists of the ...

    • Query expansion with a little help from twitter 

      Anagnostopoulos, I.; Razis, G.; Mylonas, P.; Anagnostopoulos, C. N. (2013)
      With the advent and rapid spread of microblogging services, web information management finds a new research topic. Although classical information retrieval methods and techniques help search engines and services to present ...

    • RDF resource search and exploration with LinkZoo 

      Meimaris M., Alexiou G., Gkirtzou K., Papastefanatos G., Dalamagas T. (2015)
      The Linked Data paradigm is the most common practice for publishing, sharing and managing information in the Data Web. Linkzoo is an IT infrastructure for collaborative publishing, annotating and sharing of Data Web ...

    • The SAINT observatory subsystem: an open-source intelligence tool for uncovering cybersecurity threats 

      Vlachos V., Stamatiou Y.C., Tzamalis P., Nikoletseas S. (2022)
      Data from Online Social Networks, search engines, and the World Wide Web are forms of unstructured knowledge that are not regularly used in cybersecurity systems. The main reason for the reluctance to utilize them is the ...

    • Semantic based search engine for 3D shapes: Design and early prototype implementation 

      Vasilakis, G.; Pitikakis, M.; Vavalis, M.; Houstis, C. (2005)
      Searching for 3D resources is gradually becoming one of those intriguing research topics that have the potential to shape how users will access and interact with the internet in the years to come. Search engines like Google ...

    • Socio-semantic query expansion using Twitter hashtags 

      Anagnostopoulos, I.; Kolias, V.; Mylonas, P. (2012)
      In this paper we introduce an algorithmic approach, capable of creating a semantic network with concatenated terms and phrases (hashtags) from collectively postings on the Twittersphere. This network could be exploited for ...

    • SoCLog: A real-time, automatically generated logging and profiling mechanism for FPGA-based Systems on Chip 

      Parnassos I., Skrimponis P., Zindros G., Bellas N. (2016)
      Recent advances in FPGA technology and the proliferation of High Level Synthesis (HLS) tools makes it possible to implement complex System on Chip (SoC) designs that realize complete applications in a single FPGA device. ...