Sürdürülebilir Kalkınma Amaçları

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• MakaleAçık Erişim2026Scopus SJRQ2/r/munzur/1302
  Translation-Aware Multilingual Sentiment Analysis: A Comparative Study of Machine Translation Systems and Transformer Ensembles

  Aslan, Serpil; Kartoğlu, Celal Şamil; Can, Ümit

  Multilingual sentiment analysis remains challenging because of cross-linguistic differences, uneven data availability, and potential shifts in meaning introduced during translation. Rather than proposing a new model, this study examines the performance of translation-based pipelines and ensemble Transformer models in multilingual settings. The primary objective is to investigate differences in downstream sentiment classification performance between translation systems within a consistent evaluation framework. Texts in Arabic, Chinese, French, and Italian are standardized through label harmonization and basic preprocessing and subsequently translated into English using Google Translate and the open-source LibreTranslate. Sentiment classification is performed using three Transformer-based models: DeBERTa-v3, RoBERTa, and BERTweet. The experiments are formulated as a binary polarity-classification task comprising positive and negative instances, with neutral samples excluded because their annotations are not directly comparable across the heterogeneous source datasets. Predictions from the individual models are combined through majority voting without introducing a new ensemble method. Experiments on the resulting binary datasets demonstrate that the ensemble achieves the highest mean weighted F1-score, with low fold-to-fold variation under both translation pipelines. Google Translate yields higher and more consistent classification performance across the evaluated subsets, whereas LibreTranslate exhibits greater variation. Given that the datasets differ in domain and genre, these variations cannot be attributed solely to linguistic differences. Overall, the findings reveal differences in downstream sentiment classification performance between the two translation pipelines and indicate that the ensemble combines high mean performance with low fold-to-fold variation within the evaluated binary setting.

  İncele
• MakaleYalnız künye2026Scopus SJRQ1/r/munzur/1031
  Analysis of the impact of the social justice index on the COVID-19 pandemic using artificial intelligence in EU and OECD countries

  Utku, Anıl; Can, Ümit; BARUT, Abdulkadir; Pilatin, Abdulmuttalip; Sharabati, Abdel-Aziz Ahmad

  The COVID-19 disease has evolved into a pandemic that affects the world in multiple dimensions. While COVID-19 spread rapidly to several nations, distinct patterns of spread emerged in each nation. This spreading behavior is related to various characteristics of countries, including social, political, and economic factors. In this study, an analysis of the COVID-19 pandemic in EU and OECD countries was conducted, taking into account the social justice index for the first time. The impact and significance of the social justice index on the COVID-19 analysis results were attempted to be revealed. As a result, it is understood that the countries with high Social Justice Index scores and sub-dimension scores are more successful in combating the COVID-19 pandemic. In addition, a new LSTM-based model was developed to predict the number of cases and deaths in these countries. The designed LSTM approach was compared with some well-known deep learning and machine learning algorithms. As a result of the experimental studies, the LSTM model obtained the best prediction results. Finally, the similarities between these countries in terms of the characteristics of the COVID-19 pandemic, including death and case spread, were analyzed, and exciting results were disclosed.

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  İncele
• MakaleYalnız künye2023Scopus SJRQ1/r/munzur/2053
  A long short-term memory-based hybrid model optimized using a genetic algorithm for particulate matter 2.5 prediction

  Utku, Anıl; Can, Ümit; Kamal, Mustafa; Das, Narasingha; Cifuentes-Faura, Javier; Barut, Abdulkadir

  Beijing, Shanghai, Singapore, and London are regions with high population density and industrial activities. In this sense, accurate prediction of the rate of particulate matter 2.5 (PM_2.5), one of the most important air pollutants, is very important for creating a healthy ecological system. This study proposes a hybrid method to predict PM_2.5 with high success. This method aims to optimize the Long Short-Term Memory (LSTM) deep learning model, which successfully solves time series problems with a Genetic Algorithm (GA). Here, the hyperparameters of the LSTM model, such as the number of layers, number of neurons, number of epochs, and kernel size, are optimized to achieve the highest prediction rate. Against this backdrop, the present study uses for the first time a hybrid GA-LSTM model to predict PM_2.5 concentrations in Beijing, Shanghai, Singapore, and London. The Beijing dataset consists of 13 attributes, the Shanghai dataset consists of 10 attributes, the London dataset consists of 5 attributes, and the Singapore dataset consists of 7 attributes. In this study, input variables such as PM_2.5, DEWP, TEMP, PRESS, WS, WD, PRE, Snowfall hours, Rain hours, and Season were used. To assess the effectiveness of this hybrid method, the developed GA-LSTM model was compared with k-Nearest Neighbors (kNN), Random Forest (RF), Support Vector Regression (SVR), Extreme Gradient Boosting (XGBoost), Convolutional Neural Networks (CNN), LSTM, and Gated Recurrent Units (GRU). Experimental results showed that GA-LSTM outperformed the compared models. In addition, one of the best results was obtained compared to other models in the literature.

  AtıfScopus17·OpenAlex18

  İncele
• MakaleAçık Erişim2022/r/munzur/5845
  Covid-19 Aşılama Sürecinin Tahminine Yönelik Derin Öğrenme Tabanlı Bir Model

  Utku, Anıl; Can, Ümit

  Covid-19 pandemisi, insanlığın son zamanlarda karşılaştığı en büyük zorluklardan biridir. Henüz tedavi edici bir ilaç geliştirilemediği için tüm dünyayı sosyal ve ekonomik anlamda olumsuz etkilemektedir. Covid-19’un etkilerini ve vücutta bıraktığı hasarı en aza indirmek için farklı aşı çalışmaları yapılmıştır. Dünya genelinde insanlar aşılanarak salgının seyri kontrol altına alınmaya çalışılmaktadır. Bu noktada kullanılacak günlük aşı miktarının belirlenmesi, ihtiyaç duyulacak aşı ve enjektör gibi malzemelerin miktarına ve bunlarla beraber sağlık hizmetlerinin planlanmasına kadar önemli birçok alanda belirleyici olacaktır. Bununla birlikte birçok araştırmacı, virüs yayılım modeli oluşturmak ve Covid-19'un gidişatını tahmin etmek için farklı tahmin yöntemleri önermiştir. Bunlar arasında yapay zekâya dayalı yöntemler en ilgi çekici ve yaygın olarak kullanılan yöntemlerdir. Bu çalışmada, dünyada en yüksek aşılama oranına sahip ilk 20 ülke için günlük yapılan aşı sayılarının tahmin edilmesi amaçlanmıştır. Bu amaçla DT, kNN, LR, RF, SVM, MLP, CNN, RNN ve geliştirilen LSTM tabanlı derin öğrenme modelinin karşılaştırmalı bir analizi sunulmuştur. Uygulanan modeller için RMSE, MAE ve R2 metriklerine göre elde edilen deneysel sonuçlar karşılaştırmalı olarak analiz edilmiştir. Deneysel sonuçlar, geliştirilen LSTM tabanlı modelin uygulanan ülkelerin tamamına yakınında 0.90’ın üzerinde R2 değerine sahip olduğunu göstermiştir

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  AtıfOpenAlex1

  İncele