Ioannis Korkontzelos

ORCID: 0000-0001-8052-2471
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About
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Research Areas
  • Topic Modeling
  • Natural Language Processing Techniques
  • Biomedical Text Mining and Ontologies
  • Semantic Web and Ontologies
  • Sentiment Analysis and Opinion Mining
  • Advanced Text Analysis Techniques
  • Ectopic Pregnancy Diagnosis and Management
  • Software Engineering Research
  • Complex Network Analysis Techniques
  • Uterine Myomas and Treatments
  • Spam and Phishing Detection
  • Opinion Dynamics and Social Influence
  • Misinformation and Its Impacts
  • Endometriosis Research and Treatment
  • Congenital Anomalies and Fetal Surgery
  • Open Source Software Innovations
  • Assisted Reproductive Technology and Twin Pregnancy
  • Web Data Mining and Analysis
  • Scientific Computing and Data Management
  • Social Media and Politics
  • Wikis in Education and Collaboration
  • Gynecological conditions and treatments
  • Service-Oriented Architecture and Web Services
  • Ovarian cancer diagnosis and treatment
  • Text and Document Classification Technologies

Edge Hill University
2016-2025

General Hospital of Ioannina G. Hatzikosta
2007-2025

Laiko General Hospital of Athens
2023-2024

Medical University of Sofia
2023-2024

University of Patras
2024

Aretaeio Hospital
2024

University Hospital of Ioannina
2002-2024

National and Kapodistrian University of Athens
2023-2024

Aristotle University of Thessaloniki
2023-2024

Universität Greifswald
2023-2024

The abundance of text available in social media and health related forums along with the rich expression public opinion have recently attracted interest community to use these sources for pharmacovigilance. Based on intuition that patients post about Adverse Drug Reactions (ADRs) expressing negative sentiments, we investigate effect sentiment analysis features locating ADR mentions. We enrich feature space a state-of-the-art identification method features. Using corpus posts from...

10.1016/j.jbi.2016.06.007 article EN cc-by Journal of Biomedical Informatics 2016-06-28

Online Social Media platforms, such as Facebook and Twitter, enable all users, independently of their characteristics, to freely generate consume huge amounts data. While this data is being exploited by individuals organisations gain competitive advantage, a substantial amount generated spam or fake users. One in every 200 social media messages one 21 tweets estimated be spam. The rapid growth the volume global expected compromise research works that use data, thereby questioning...

10.1016/j.neucom.2018.07.044 article EN cc-by-nc-nd Neurocomputing 2018-08-08

Learning from outliers and imbalanced data remains one of the major difficulties for machine learning classifiers. Among numerous techniques dedicated to tackle this problem, preprocessing solutions are known be efficient easy implement. In paper, we propose a selective approach that embeds knowledge outlier instances into artificially generated subset achieve an even distribution. The Synthetic Minority Oversampling TEchnique (SMOTE) was used balance training by introducing artificial...

10.1016/j.artmed.2020.101815 article EN cc-by-nc-nd Artificial Intelligence in Medicine 2020-02-10

Social media are well-established means of online communication, generating vast amounts data. In this paper, we focus on Twitter and investigate behavioural differences between male female users social media. Using Natural Language Processing Machine Learning approaches, propose a user gender identification method that considers both the tweets profile description user. For experimentation evaluation, enriched used an existing User Gender Classification dataset, which is freely available...

10.1016/j.nlp.2023.100018 article EN cc-by Natural Language Processing Journal 2023-06-10

Background and Objectives Declining mental health is a prominent concerning issue. Affective classification, which employs machine learning on brain signals captured from electroencephalogram (EEG), prevalent approach to address this However, many existing studies have adopted one-size-fits-all approach, where data multiple individuals are combined create single "generic" classification model. This overlooks individual differences may not accurately capture the unique emotional patterns of...

10.1080/08839514.2025.2450568 article EN cc-by Applied Artificial Intelligence 2025-01-16

Drug named entity recognition (NER) is a critical step for complex biomedical NLP tasks such as the extraction of pharmacogenomic, pharmacodynamic and pharmacokinetic parameters. Large quantities high quality training data are almost always prerequisite employing supervised machine-learning techniques to achieve classification performance. However, human labour needed produce maintain resources significant limitation. In this study, we improve performance drug NER without relying exclusively...

10.1016/j.artmed.2015.05.007 article EN cc-by Artificial Intelligence in Medicine 2015-06-17

The manuscript presents a case of 29-year-old pregnant woman who developed severe psychotic episode during the second trimester her pregnancy. Bipolar disorder (BD) is serious mood uncertain etiology marked by significant and long-lasting fluctuations in mood. It major cause disability worldwide, with higher rate progression frequency women. Pregnancy represents vulnerable period for women BD, as hormonal psychological changes can trigger episodes. Pharmacological treatment was given,...

10.7759/cureus.80065 article EN Cureus 2025-03-04

A forum or social media post can express multiple emotions, such as love, joy anger. Emotion classification has been proven useful for measuring aspects user satisfaction. Despite its usefulness, research in emotion is limited, because the task multi-label and publicly available data sets lexica are very limited. number of classifiers general-domain text have proposed recently, but only a few domain Open Source Software (OSS), EmoTxt. In this paper, we explore different two algorithms...

10.1016/j.knosys.2020.105633 article EN cc-by Knowledge-Based Systems 2020-02-14

Natural Language Processing (NLP) is the sub-field of Artificial Intelligence that represents and analyses human language automatically. NLP has been employed in many applications, such as information retrieval, processing automated answer ranking. Semantic analysis focuses on understanding meaning text. Among other proposed approaches, Latent Analysis (LSA) a widely used corpus-based approach evaluates similarity text based semantic relations among words. LSA applied successfully diverse...

10.1016/j.eswa.2020.114130 article EN cc-by Expert Systems with Applications 2020-10-24

Citation screening is a labour-intensive part of the process systematic literature review that identifies citations eligible for inclusion in review. In this paper, we present an automatic text classification approach aims to prioritise earlier than ineligible ones and thus reduces manual labelling effort involved process. e.g. by automatically excluding lower ranked citations. To improve performance classifier, develop novel neural network-based feature extraction method. Unlike previous...

10.1016/j.eswax.2020.100030 article EN Expert Systems with Applications X 2020-05-03

Heterotopic triplet pregnancy is an exceptionally rare medical condition. The broad use of assisted reproductive technologies has contributed to the increase ectopic and subsequently heterotopic rate, masking a life-threatening condition for gravid intrauterine pregnancy. We describe case woman with triplets at 9 +4 gestational week following transfer three embryos obtained by in vitro fertilization techniques. tubal was ruptured salpingectomy performed laparotomy. progressed delivery...

10.1155/2014/356131 article EN cc-by Case Reports in Obstetrics and Gynecology 2014-01-01

A network is a composition of many communities, i.e., sets nodes and edges with stronger relationships, distinct overlapping properties. Community detection crucial for various reasons, such as serving functional unit that captures local interactions among nodes. Communities come in forms types, ranging from biologically to technology-induced ones. As social media networks Twitter Facebook connect myriad diverse users, leading highly connected dynamic ecosystem. Although algorithms have been...

10.1016/j.neucom.2021.01.059 article EN cc-by Neurocomputing 2021-02-03

Clinical trials are mandatory protocols describing medical research on humans and among the most valuable sources of practice evidence. Searching for relevant to some query is laborious due immense number existing protocols. Apart from search, writing new includes composing detailed eligibility criteria, which might be time-consuming, especially researchers. In this paper we present ASCOT, an efficient search application customised clinical trials. ASCOT uses text mining data methods enrich...

10.1186/1472-6947-12-s1-s3 article EN cc-by BMC Medical Informatics and Decision Making 2012-04-30

Fibroepithelial stromal polyps (FEPs) are benign skin tumors or lesions of mesenchymal and ectodermal origin, also referred to as acrochordons. Herein, we report the case a 45-year-old woman with large ulcerated fibroepithelial polyp extending from right labium vulva. No known predisposing factor was recorded justify presence rapid growth polyp. Antibiotic treatment given due inflammation, magnetic resonance imaging useful in establishing diagnosis. A wide surgical excision performed,...

10.7759/cureus.40017 article EN Cureus 2023-06-05

Identifying whether a multi-word expression (MWE) is compositional or not important for numerous NLP applications. Sense induction can partition the context of MWEs into semantic uses and therefore aid in deciding compositionality. We propose an unsupervised system to explore this hypothesis on compound nominals, proper names adjective-noun constructions, evaluate contribution sense induction. The evaluation set derived from WordNet semisupervised way. Graph connectivity measures are...

10.3115/1667583.1667605 article EN 2009-01-01

The vast numbers of digitised documents containing historical data constitute a rich research repository. However, computational methods and tools available to explore this are still limited in functionality. Research on archives is largely carried out manually. Text mining technologies offer novel analyse digital content identify various types semantic information these extract them as metadata. Methods range from the automatic identification named entities (e.g., people, places,...

10.1109/digitalheritage.2013.6743801 article EN 2013-10-01
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