Costas Vassilakis

Prof. Costas Vassilakis

Informatics and Telecommunications, University of Peloponnese, Trípoli, Peloponnísos, Greece
orcid

Research Focus & Metrics

Academic Career Length

35Years (1992-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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2 November 2007 in ACM Computing Surveys
Verified
Journal Article
Open access
AKAkrivi Katifori
Akrivi Katifori
CHConstantin Halatsis
Constantin Halatsis
GLGeorge Lepouras
George Lepouras
Costas VassilakisCostas Vassilakis
Costas Vassilakis
EGEugenia Giannopoulou
Eugenia Giannopoulou
Ontologies, as sets of concepts and their interrelations in a specific domain, have proven to be a useful tool in the areas of digital libraries, the semantic web, and personalized information management. As a result, there is a growing need for effective ontology visualization for design, management and browsing. There exist several ontology visualization methods and also a number of techniques used in other contexts that could be adapted for ontology representation. The purpose of this article is to present these techniques and categorize their characteristics and features in order to assist method selection and promote future research in the area of ontology visualization.

1 June 2004 in Virtual Reality
Verified
Journal Article
Closed access
PDF file
GLGeorge Lepouras
George Lepouras
Costas VassilakisCostas Vassilakis
Costas Vassilakis

Damianos P. SakasDamianos P. Sakas
Damianos P. Sakas
Dimitrios P. ReklitisDimitrios P. Reklitis
Dimitrios P. Reklitis
MTMarina C. Terzi
Marina C. Terzi
Costas VassilakisCostas Vassilakis
Costas Vassilakis
The tourism sector increasingly relies on technology to acquire new clients in a world overflowing with information. So, the main question that needs to be answered is:What digital marketing strategy should be adopted to attract customers and built digital brand name by incorporating websites and social media big data? The authors of this research utilize web analytics and big data to build an innovative methodology in an effort to address this issue. After the data collection, statistical analysis was implemented, followed by a fuzzy cognitive map and an agent-based simulation model in order to illustrate the usage of social media and user experience in multichannel marketing. The findings suggest that, in contrast to the websites of other industries, such as logistics, where customers want to finish their inquiries as quickly as possible and leave the webpage, it is advantageous for tourism websites to keep customers’ attention moreon their website in order to increasevisibility. Additionally, the research further highlights the importance of personalization and user-engagement content to e-WOM, suggesting to tourism businesses to encourage posts made by customers and employees.

7 November 2024 in Electronics
Verified
Journal Article
Open access
PDF file
FAFotios Asimakopoulos
Fotios Asimakopoulos
Costas VassilakisCostas Vassilakis
Costas Vassilakis
Dionisis MargarisDionisis Margaris
Dionisis Margaris
Konstantinos KotisKonstantinos Kotis
Konstantinos Kotis
Dimitris SpiliotopoulosDimitris Spiliotopoulos
Dimitris Spiliotopoulos
This article explores the transformative potential of artificial intelligence (AI) tools across the agricultural value chain, highlighting their applications, benefits, challenges, and future prospects. With global food demand projected to increase by 70% by 2050, AI technologies—including machine learning, big data analytics, and the Internet of things (IoT)—offer critical solutions for enhancing agricultural productivity, sustainability, and resource efficiency. The study provides a comprehensive review of AI applications at multiple stages of the agricultural value chain, including land use planning, crop selection, resource management, disease detection, yield prediction, and market integration. It also discusses the significant challenges to AI adoption, such as data accessibility, technological infrastructure, and the need for specialized skills. By examining case studies and empirical evidence, the article demonstrates how AI-driven solutions can optimize decision-making and operational efficiency in agriculture. The findings underscore AI’s pivotal role in addressing global agricultural challenges, with implications for farmers, agribusinesses, policymakers, and researchers. This article aims to advance the evolving research and discussions on sustainable agriculture, contributing insights that promote the adoption of AI technologies and influence the future of farming.

2 February 2025 in Information
Verified
Journal Article
Open access
PDF file
FAFotios Asimakopoulos
Fotios Asimakopoulos
Costas VassilakisCostas Vassilakis
Costas Vassilakis
Dionisis MargarisDionisis Margaris
Dionisis Margaris
Konstantinos KotisKonstantinos Kotis
Konstantinos Kotis
Dimitris SpiliotopoulosDimitris Spiliotopoulos
Dimitris Spiliotopoulos
The integration of cutting-edge technologies—such as the Internet of Things (IoT), artificial intelligence (AI), machine learning (ML), and various emerging technologies—is revolutionizing agricultural practices, enhancing productivity, sustainability, and efficiency. The objective of this study is to review the literature regarding the development and evolution of AI as well as other emerging technologies in the various fields of Agriculture as they are developed and transformed by integrating the above technologies. The areas examined in this study are open field smart farming, vertical and indoor farming, zero waste agriculture, precision livestock farming, smart greenhouses, and regenerative agriculture. This paper links current research, technological innovations, and case studies to present a comprehensive review of these emerging technologies being developed in the context of smart agriculture, for the benefit of farmers and consumers in general. By exploring practical applications and future perspectives, this work aims to provide valuable insights to address global food security challenges, minimize environmental impacts, and support sustainable development goals through the application of new technologies.

1 January 2018 in Future Generation Computer Systems
Verified
Journal Article
Closed access
Dionisis MargarisDionisis Margaris
Dionisis Margaris
Costas VassilakisCostas Vassilakis
Costas Vassilakis
PGPanagiotis Georgiadis
Panagiotis Georgiadis