1. Introduction

Ever since its inception, in 2001, Wikipedia has continuously grown to become one the largest information source on the Internet. One of its unique features is that it offers the ability to anyone to edit the articles. This popularity, in itself, means that, a number of articles can be read, edited, and enhanced by different editors and, inevitably, be subject to acts of vandalisms through illegitimate editing.

This paper is an extension of work originally presented in [1], by addressing the issue of class imbalance in the detection of vandalism in Wikipedia articles across languages.

Vandalism means any type of editing which damages the reputation of an article or a user in Wikipedia. A list of typical vandalisms along with their chances of appearance was created as a result of empirical studies done by Priedhorsky et al. [2]. Typical examples include massive deletions, spam, partial deletions, offences and misinformation. In order to deal with vandalism, Wikipedia relies on the following users:

• • Wikipedia users’ ability and willingness to find (accidentally or deliberately) damaged articles
  • Wikipedia administrators and
  • Wikipedia users with additional privilege

2. Wikipedia Vandalsm Detection

To define the vandalism detection task, we have to define some key concepts of MediaWiki (the wiki engine used by Wikipedia).

An article is composed of a sequence of revisions, commonly referred to as the article history. A revision is the state of an article at a given time in its history and is composed of the textual content and metadata describing the transition from the previous revision [5]. Revision metadata contains, among others, the user who performed the edit, a comment explaining the changes, a timestamp, etc. An edit is a tuple of two consecutive revisions and should be interpreted as the transition from a given revision to the next one.

Evaluating a vandalism detection system requires a corpus of pre-classified edits. Our focus is on four different corpora:

• • • PAN-WVC-10 – The PAN Wikipedia Vandalism Corpus 2010 (PAN-WVC-10), compiled in 2010 via Amazon’s Mechanical Turk comprises 32439 edits from 28468 English Wikipedia articles of which 2394 have been annotated as vandalism. The dataset was created by 753 human annotators by casting 193022 votes, so that each edit has been annotated at least three times, whereas edits that were difficult to be annotated received more than three votes [6]. The PAN-WVC-10 was first used in the 1st International Competition on Wikipedia Vandalism Detection [7].
    • PAN-WVC-11 – The PAN Wikipedia Vandalism Corpus 2011 (PAN-WVC-11) from 2011 is an extension of the PAN-WVC-10. It was used in the 2^nd International Competition on Wikipedia Vandalism Detection [8]) and is the first multilingual vandalism detection corpus. The corpus comprises 29949 Wikipedia edits in total (9985 English edits with 1144 vandalisms, 9990 German edits with 589 vandalisms, and 9974 Spanish edits with 1081 vandalism annotations).
    • Wikipedia History Dump – Wikipedia records all revisions of all articles and all other Wikipedia pages and releases them as XML or SQL dump files. For this research dumps 29.10.2015 have been used for:
      • simplewiki and

2.1.  Approaches based on Machine Learning

Since 2008 Wikipedia vandalism detection based on machine learning approaches has become a field of increasing research interest. In table 1 existing vandalism detection approaches from the literature are shown, depicting Precision, Recall and PR-AUC (Precision Recall – Area Under Curve) values.

Potthast et al. [9] contributed the first machine learning vandalism detection approach using textual features as well as basic metadata features with a logistic regression classifier. Smets et al. [10] used a Naive Bayes classifier on a bag of words edit representation and were the first to use compression models to detect Wikipedia vandalism. Itakura and Clarke [11] used Dynamic Markov Compression to detect vandalism edits on Wikipedia.

Mola Velasco [12] extended the approach of Potthast et al. [9] by adding some additional textual features and multiple wordlist-based features. He was the winner of the 1^st International Competition on Wikipedia Vandalism Detection [7]. West et al. [13] were among the first to present a vandalism detection approach solely based on spatial and temporal metadata, without the need to inspect article or revision texts.

Similarly, a vandalism detection system on top of their WikiTrust reputation system was built by Adler et al. [14 and 15]. Adler et al. [16] combined natural language, spatial, temporal and reputation features used in their aforementioned works [12, 13 and 14].

Besides Adler et al. [16], West and Lee [17] were the first to introduce ex post facto data as features, for whose calculation also future revisions have to be considered.

Supporting the current trend of creating cross language vandalism classifiers, Tran and Christen [18] evaluated multiple classifiers based on a set of language independent features that were compiled from the hourly article view counts and Wikipedia’s complete edit history.

3. Objectives

The objectives of this research work were to experimentally compare four classifiers on unbalanced data with and without resampling on four different corpora: PAN-WVC-10, PANWVC-11, Simple English Wikipedia (simplewiki) and Albanian Wikipedia (sqwiki) history dumps, respectively.

We compare four different classifiers Logistic Regression, RealAdaBoost, BayesNet, and Random Forest regarding their performances using RUS and SMOTE.

Based on this experiment we try to build a model that would be able to represent the impact of class imbalance on the detection of vandalism across languages, for small scaled datasets.

3.1.  The Class Imbalance Problem

The problem of used vandalism corpora (Webis-WVC-07, PAN-WVC-10 and PAN-WVC-11) is that they offer data that are highly skewed. What this means is that the ratio between the number of vandalism and regular edits is highly imbalanced (5-7% of all samples are annotated as vandalism edits).

Learning traditional classifiers with such datasets can cause lower detection performance. Based on surveys of classifying imbalanced data by He and Garcia [20] and Ganganwar [21] we can list three reasons for performance decline:

• If classifier learning is based on minimizing the overall error, then the minority class instances contribute little to the error. This results in an increase of bias of the classifier towards the majority class.
• Many classifiers assume a balanced class distribution of the minority and the majority class, which is not often the case when working with realistic scenarios.
• Often classifiers implicitly assume equal costs for misclassification for both classes, which is often not sensible: for example, the cost for classifying cancer as non-cancer is way higher than the other way round.
  

  Authors	Data	Classifier	Precision	Recall	PR-AUC	Corpora
  Smets et al. [10]	Unbalanced	Probabilistic Sequence Modeling	0.3209	0.9171	–	Simplewiki
  Smets et al. [10]	Unbalanced	Naive Bayes	0.4181	0.5667	–	Simplewiki
  Tran and Christen [18]	Balanced	Gradient Tree Boosting	0.870	0.870	–	Historical Dump
  Potthast et al. [9]	Unbalanced	Logistic Regression	0.830	0.870	–	Webis-WVC-07
  Velasco [5]	Unbalanced	Random Forest	0.860	0.570	0.660	PAN-WVC-10
  Adler et al. [14]	Unbalanced	ADTree	0.370	0.770	0.490	PAN-WVC-10
  Adler et al. [16]	Unbalanced	Random Forest	–	–	0.820	PAN-WVC-10
  West and Lee [17]	Unbalanced	ADTree	0.370	0.770	0.490	PAN-WVC-10
  Harpalani et al. [19]	Unbalanced	LogitBoost	0.606	0.608	0.671	PAN-WVC-10
  West and Lee [17]	Unbalanced	ADTRee	–	–	0.820	PAN-WVC-11

  Table 1: Vandalism detection classification obtained from various authors

  1. Experiments and Results

For SMOTE oversampling we use an amount of 50% and 100% of the original vandalism class instances (SMOTE₅₀ and SMOTE₁₀₀).

In general, there are two approaches to overcome the class imbalance problem:

• The data level that involves several training data resampling techniques.
• The algorithmic level that involves adjusting the misclassification costs or probabilistic estimates, e.g., at the tree leaves of decision tree classifiers, as well as learning classifier models solely based on minority class samples (so-called one-class classification).

During the examination of the impact of training dataset resampling on vandalism detection performance we find that, in most cases, resampling reduces the performance of the tested classifiers. Logistic Regression, Real Ada Boost and Bayesian Network classifiers benefit from certain resampling strategies, whereas a Random Forest classifier turns out to be relatively unaffected by resampling approaches.

3.2.  Evaluating Resampling Techniques

One approach to overcome performance issues of classifiers is resampling the training dataset in order to balance the classes. There are several common approaches to do so, namely random under sampling, random oversampling, directed over and under sampling and hybrid methods which combine the aforementioned [20].

3.2.1.         Resampling Strategies

Random under sampling (RUS) removes a certain amount of randomly picked majority class instances from the training dataset. RUS leads to class balancing or, in an extreme case, even to majority class removal. However, a disadvantage of RUS is the loss of possibly decisive instances. Since important information for the class separation is likely to be removed, this technique might induce a lower classification performance.

Random over sampling (ROS) reproduces a certain amount of randomly chosen minority class samples. Thus, the class distribution can be adjusted towards a uniform distribution. Since classifiers, after oversampling, are trained by using some minority class values multiple times, the learned model is likely to over fit.

The Synthetic Minority Oversampling TEchnique (SMOTE) by Chawla et al. [22] over samples the minority class by computing artificial instances. The feature values of these samples are calculated by random interpolation of the K-nearest neighbors’ feature values (typically K = 5). The method aims at avoiding over fitting while oversampling minority class instances. Han et al. [23] extend SMOTE to use only the minority class samples at the class borderline (borderlineSMOTE) in order to generate artificial data which is more important for classification.

3.2.2.         The Classifiers

Our focus is on Logistic Regression and Random Forest, since they are used by Potthast et al. [9], Mola Velasco [12], and Adler et al. [16]. Additionally, we consider RealAdaBoost as a state-of-the-art Boosting algorithm and a Bayesian Network classifier as a Bayes approach that is reported to outperform the Naive Bayes classifier used by Smets et al. [10].

Logistic Regression analysis estimates the relationship between a dependent variable and one or more independent variables.

RealAdaBoost (Friedman et al. [24]) is a boosting algorithm based on Adaptive Boosting (AdaBoost) by Freund and Schapire [25]. Boosting is a method to enhance classification performance by combining many weak base classifiers (weak hypotheses) in order to create a more powerful classifier.

A Bayesian Network (Pearl and Russell [26]) is a directed acyclic graph. The nodes in the graph represent random variables; the arcs signify direct correlations between these variables. Tree Augmented Naive Bayes (TAN) described by Friedman et al. [27] has been used in the experiments. In our experiment, each attribute in the graph has only the class value and at most one other attribute as parents.

Random Forest Random Forest (Breiman [28]) is an ensemble learning technique, constructing a defined number of decision tree predictors and combining them to a predictor set (forest). The individual trees are learned from randomly chosen feature subsets and represent independent and identically distributed random vectors. Each tree is grown to full depth.

To classify a new data sample, the final class is determined by the mode of classes that are predicted by the individual trees.

3.2.3.         Datasets

We use two datasets: the complete edit history of Wikipedia in Simple English and Albanian[1], and the hourly article view count[2].

The edit history data dump is that of 1 December 2015 for both, the Simple English Wikipedia and for Albanian Wikipedia [1].  In figure 1 the number of articles and edits revisions (per month and per year) are shown.

3.2.3.1.    Labeling Vandalized Revisions

From the raw revision data, every revision is reduced to a vector of features described in table 2. The reasons for selecting these features are independence from language and simplicity.

Every revision’s comment is scrutinized for keywords of “vandal” and “rvv” (revert due to vandalism), which would signal a vandalism in the previous revision. Afterwards, these revisions are marked as vandalism.

In order to correctly arrange the timestamp of revisions with the corresponding article view dataset, we round up the revision time to the next hour. This ensures that the hourly article views reference the correct revision when combining the two datasets.

The arrangement is implemented on all revisions and should not affect classification.

3.2.3.2. Article Views

The raw article view dataset is structured by views of article aggregated by hour. We use the process of applying the transformation and filtering of articles viewed in the revision dataset above (table 3), as used in [1].

Extraction of the redirect articles from the revision dataset is applied and then all access to redirect articles is changed to the canonical article. These extra view counts are aggregated accordingly. These article views are important to seeing the impact of vandalism on Wikipedia [2]. Having in mind that the average time vandalism is active is 2.1 days [5], a lot hours are for unsuspecting readers to face vandalized content.

Table 2: Description of editing history dataset

However, the behavior of vandals may also be seen in a change in access patterns, which may be from vandals checking on their work, or that article drawing attention from readers and their peers [29].

Table 3: Description of article view dataset

The edit history dataset is scanned in order to be sure that these article views occurred when articles are in a vandalized state. Then we apply labelling of all article views of observed vandalized or non-vandalized revisions.

The unknown views from revisions made before 2015, or articles without revisions in this 4-month period under study, are discarded. Thus, we have an article view dataset labelled with whether the views are of vandalized revisions.

The resulting size of the data is identical to the resulting dataset in the following subsection. This labeled article view dataset allows us to determine whether view patterns can be used to predict vandalism.

From this resulting dataset, we split the “Hour Timestamp” attribute into an “hour” attribute. This allows the machine learning algorithm to learn daily access patterns.

3.2.3.3. Resulting Dataset

The resulting dataset is created by merging two-time series datasets for each language. The dataset is constructed by adding

features from the labeled revision dataset to the labeled article view dataset by repeating features of the revisions. Thus, for every article view, we have information on what the properties are and whether this revision was viewed.

We use the “hour” attribute split from the timestamp in the article views dataset. Thus, we have the following 6 features in our resulting dataset: hour, size of the comment, size of article, anonymous edit, number of requests, and vandalism.

These features are language independent and capture the metadata of revisions commonly used, and access patterns. Article name is not included in the resulting dataset because access patterns of vandalized articles may be similar to other vandalized articles, regardless of the name of the article.

To apply the classification algorithms, we split the resulting dataset by date into a training set (September to November) and a testing set (December), as shown in figure 2.

3.3 Experiments and Results

For SMOTE oversampling we use an amount of 50% and 100% of the original vandalism class instances (SMOTE₅₀ and SMOTE₁₀₀).

Additionally, we chose an oversampling amount of 1300% which leads to an almost balanced dataset without loss of any majority class instances – 13613 (48.81%) vandalism, 14281 (51.19%) regular.

On PAN-WVC-11 we use a SMOTE oversampling of 1100% instead of 1300%, due to the different class distribution in that corpus (1100% oversampling leads to 28728 (48.88%) vandalism and 30045 (51.12%) regular samples). Table 5 provides the corresponding PR-AUC values.

Using RUS on the training data, all classifiers but RealAdaBoost on PAN-WVC-11 show a performance drop on all four corpora.

For Logistic Regression (on both corpora) and Random Forest (on PAN-WVC-10) RUS leads to the lowest overall performance.

If a classifier already handles class imbalance internally, RUS only removes majority class data that is needed to train the model without benefiting from a balanced data set. For Real Ada-Boost the loss of regular samples seems not to be as influential as the training on a balanced dataset.

SMOTE Logistic Regression benefits from SMOTE₅₀ (on PAN-WVC-10) and from SMOTE₁₀₀ (on PAN-WVC-11).  Both oversampling strategies result in the best overall performances on the respective corpora. Similar results have also been obtained on simplewiki and sqwiki.

SMOTE oversampling leads to a high performance drop for the RealAdaBoost classifier. Over-sampling the target class with SMOTE causes a slight decrease of performance if the Random Forest classifier is used on both corpora. The performance for BayesNet increases for lower oversampling proportions (50% and 100%) on PAN-WVC-11, SMOTE₅₀ even leads to the highest overall performance. On PAN-WVC-10 all SMOTE proportions result in a performance drop for the BayesNet classifier.

On PAN-WVC-10 for Logistic Regression and Random Forest, a higher oversampling proportion leads to lower performance. This is also the case for all classifiers but Logistic Regression on PAN-WVC-11. For all classifiers on both corpora SMOTE_1100/1300 lead to the lowest classification performance using SMOTE approaches. An exception is the RealAdaBoost classifier (on PAN-WVC-11), for which SMOTE₁₁₀₀ outperforms the other proportions.

A reason for the observed lower performance using SMOTE might be the absence of significant data in the training and test corpora. If the vandalism samples given in the test dataset represent other vandalism types than those given in the training set, some kinds of vandalism will never be found.

Wikipedia vandalism has been found to be a heterogeneous problem [30]. Hence, an underrepresentation of vandalism edits from certain categories in the training corpora would not be surprising, since the samples have been chosen randomly ([6], and [8]). In the case of missing decisive vandalism samples, oversampling would not produce a more accurately defined vandalism class region, but would only insert further weak samples.

4. Conclusions and Future Work

Summarizing our experiments, we can conclude that RealAdaBoost is most affected by the imbalance of the training data. Random Forest shows only little sensitivity to resampling approaches. However, it turns out to be the best performing classifier of all evaluated approaches, without applying resampling strategies, as shown in table 4.

We compared different resampling strategies applied on four classifiers, Logistic Regression, RealAdaBoost, BayesNet and Random Forest. We observed that examined resampling strategies (RUS and SMOTE) had a partial increase of the classification performance for all tested classifiers, except for Random Forest. However, regarding the total classification performance, Random Forest, trained with the original data set, outperforms all other approaches.

The reasons for the poor improvement by resampling techniques can be found in the class overlapping or due to class imbalance of the four corpora training datasets, given our chosen feature set.

With these experiments we have shown that the class imbalance has a similar impact on various datasets across languages in terms of the detection of vandalism rates.

Table 4: Values of PR-AUC for the resampling strategies

For future work, more investigation is needed to point out the within-class imbalance properties in the PAN-WVC corpora and in the Wikipedia history dumps regarding certain feature sets.

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20. Ossama Embarak, "Multi-Layered Machine Learning Model For Mining Learners Academic Performance", Advances in Science, Technology and Engineering Systems Journal, vol. 6, no. 1, pp. 850–861, 2021. doi: 10.25046/aj060194
21. Roy D Gregori Ayon, Md. Sanaullah Rabbi, Umme Habiba, Maoyejatun Hasana, "Bangla Speech Emotion Detection using Machine Learning Ensemble Methods", Advances in Science, Technology and Engineering Systems Journal, vol. 7, no. 6, pp. 70–76, 2022. doi: 10.25046/aj070608
22. Deeptaanshu Kumar, Ajmal Thanikkal, Prithvi Krishnamurthy, Xinlei Chen, Pei Zhang, "Analysis of Different Supervised Machine Learning Methods for Accelerometer-Based Alcohol Consumption Detection from Physical Activity", Advances in Science, Technology and Engineering Systems Journal, vol. 7, no. 4, pp. 147–154, 2022. doi: 10.25046/aj070419
23. Zhumakhan Nazir, Temirlan Zarymkanov, Jurn-Guy Park, "A Machine Learning Model Selection Considering Tradeoffs between Accuracy and Interpretability", Advances in Science, Technology and Engineering Systems Journal, vol. 7, no. 4, pp. 72–78, 2022. doi: 10.25046/aj070410
24. Ayoub Benchabana, Mohamed-Khireddine Kholladi, Ramla Bensaci, Belal Khaldi, "A Supervised Building Detection Based on Shadow using Segmentation and Texture in High-Resolution Images", Advances in Science, Technology and Engineering Systems Journal, vol. 7, no. 3, pp. 166–173, 2022. doi: 10.25046/aj070319
25. Osaretin Eboya, Julia Binti Juremi, "iDRP Framework: An Intelligent Malware Exploration Framework for Big Data and Internet of Things (IoT) Ecosystem", Advances in Science, Technology and Engineering Systems Journal, vol. 6, no. 5, pp. 185–202, 2021. doi: 10.25046/aj060521
26. Arwa Alghamdi, Graham Healy, Hoda Abdelhafez, "Machine Learning Algorithms for Real Time Blind Audio Source Separation with Natural Language Detection", Advances in Science, Technology and Engineering Systems Journal, vol. 6, no. 5, pp. 125–140, 2021. doi: 10.25046/aj060515
27. Baida Ouafae, Louzar Oumaima, Ramdi Mariam, Lyhyaoui Abdelouahid, "Survey on Novelty Detection using Machine Learning Techniques", Advances in Science, Technology and Engineering Systems Journal, vol. 6, no. 5, pp. 73–82, 2021. doi: 10.25046/aj060510
28. Radwan Qasrawi, Stephanny VicunaPolo, Diala Abu Al-Halawa, Sameh Hallaq, Ziad Abdeen, "Predicting School Children Academic Performance Using Machine Learning Techniques", Advances in Science, Technology and Engineering Systems Journal, vol. 6, no. 5, pp. 08–15, 2021. doi: 10.25046/aj060502
29. Zhiyuan Chen, Howe Seng Goh, Kai Ling Sin, Kelly Lim, Nicole Ka Hei Chung, Xin Yu Liew, "Automated Agriculture Commodity Price Prediction System with Machine Learning Techniques", Advances in Science, Technology and Engineering Systems Journal, vol. 6, no. 4, pp. 376–384, 2021. doi: 10.25046/aj060442
30. Hathairat Ketmaneechairat, Maleerat Maliyaem, Chalermpong Intarat, "Kamphaeng Saen Beef Cattle Identification Approach using Muzzle Print Image", Advances in Science, Technology and Engineering Systems Journal, vol. 6, no. 4, pp. 110–122, 2021. doi: 10.25046/aj060413
31. Md Mahmudul Hasan, Nafiul Hasan, Dil Afroz, Ferdaus Anam Jibon, Md. Arman Hossen, Md. Shahrier Parvage, Jakaria Sulaiman Aongkon, "Electroencephalogram Based Medical Biometrics using Machine Learning: Assessment of Different Color Stimuli", Advances in Science, Technology and Engineering Systems Journal, vol. 6, no. 3, pp. 27–34, 2021. doi: 10.25046/aj060304
32. Dominik Štursa, Daniel Honc, Petr Doležel, "Efficient 2D Detection and Positioning of Complex Objects for Robotic Manipulation Using Fully Convolutional Neural Network", Advances in Science, Technology and Engineering Systems Journal, vol. 6, no. 2, pp. 915–920, 2021. doi: 10.25046/aj0602104
33. Md Mahmudul Hasan, Nafiul Hasan, Mohammed Saud A Alsubaie, "Development of an EEG Controlled Wheelchair Using Color Stimuli: A Machine Learning Based Approach", Advances in Science, Technology and Engineering Systems Journal, vol. 6, no. 2, pp. 754–762, 2021. doi: 10.25046/aj060287
34. Antoni Wibowo, Inten Yasmina, Antoni Wibowo, "Food Price Prediction Using Time Series Linear Ridge Regression with The Best Damping Factor", Advances in Science, Technology and Engineering Systems Journal, vol. 6, no. 2, pp. 694–698, 2021. doi: 10.25046/aj060280
35. Javier E. Sánchez-Galán, Fatima Rangel Barranco, Jorge Serrano Reyes, Evelyn I. Quirós-McIntire, José Ulises Jiménez, José R. Fábrega, "Using Supervised Classification Methods for the Analysis of Multi-spectral Signatures of Rice Varieties in Panama", Advances in Science, Technology and Engineering Systems Journal, vol. 6, no. 2, pp. 552–558, 2021. doi: 10.25046/aj060262
36. Phillip Blunt, Bertram Haskins, "A Model for the Application of Automatic Speech Recognition for Generating Lesson Summaries", Advances in Science, Technology and Engineering Systems Journal, vol. 6, no. 2, pp. 526–540, 2021. doi: 10.25046/aj060260
37. Sebastianus Bara Primananda, Sani Muhamad Isa, "Forecasting Gold Price in Rupiah using Multivariate Analysis with LSTM and GRU Neural Networks", Advances in Science, Technology and Engineering Systems Journal, vol. 6, no. 2, pp. 245–253, 2021. doi: 10.25046/aj060227
38. Byeongwoo Kim, Jongkyu Lee, "Fault Diagnosis and Noise Robustness Comparison of Rotating Machinery using CWT and CNN", Advances in Science, Technology and Engineering Systems Journal, vol. 6, no. 1, pp. 1279–1285, 2021. doi: 10.25046/aj0601146
39. Md Mahmudul Hasan, Nafiul Hasan, Mohammed Saud A Alsubaie, Md Mostafizur Rahman Komol, "Diagnosis of Tobacco Addiction using Medical Signal: An EEG-based Time-Frequency Domain Analysis Using Machine Learning", Advances in Science, Technology and Engineering Systems Journal, vol. 6, no. 1, pp. 842–849, 2021. doi: 10.25046/aj060193
40. Reem Bayari, Ameur Bensefia, "Text Mining Techniques for Cyberbullying Detection: State of the Art", Advances in Science, Technology and Engineering Systems Journal, vol. 6, no. 1, pp. 783–790, 2021. doi: 10.25046/aj060187
41. Inna Valieva, Iurii Voitenko, Mats Björkman, Johan Åkerberg, Mikael Ekström, "Multiple Machine Learning Algorithms Comparison for Modulation Type Classification Based on Instantaneous Values of the Time Domain Signal and Time Series Statistics Derived from Wavelet Transform", Advances in Science, Technology and Engineering Systems Journal, vol. 6, no. 1, pp. 658–671, 2021. doi: 10.25046/aj060172
42. Carlos López-Bermeo, Mauricio González-Palacio, Lina Sepúlveda-Cano, Rubén Montoya-Ramírez, César Hidalgo-Montoya, "Comparison of Machine Learning Parametric and Non-Parametric Techniques for Determining Soil Moisture: Case Study at Las Palmas Andean Basin", Advances in Science, Technology and Engineering Systems Journal, vol. 6, no. 1, pp. 636–650, 2021. doi: 10.25046/aj060170
43. Ndiatenda Ndou, Ritesh Ajoodha, Ashwini Jadhav, "A Case Study to Enhance Student Support Initiatives Through Forecasting Student Success in Higher-Education", Advances in Science, Technology and Engineering Systems Journal, vol. 6, no. 1, pp. 230–241, 2021. doi: 10.25046/aj060126
44. Lonia Masangu, Ashwini Jadhav, Ritesh Ajoodha, "Predicting Student Academic Performance Using Data Mining Techniques", Advances in Science, Technology and Engineering Systems Journal, vol. 6, no. 1, pp. 153–163, 2021. doi: 10.25046/aj060117
45. Sara Ftaimi, Tomader Mazri, "Handling Priority Data in Smart Transportation System by using Support Vector Machine Algorithm", Advances in Science, Technology and Engineering Systems Journal, vol. 5, no. 6, pp. 1422–1427, 2020. doi: 10.25046/aj0506172
46. Othmane Rahmaoui, Kamal Souali, Mohammed Ouzzif, "Towards a Documents Processing Tool using Traceability Information Retrieval and Content Recognition Through Machine Learning in a Big Data Context", Advances in Science, Technology and Engineering Systems Journal, vol. 5, no. 6, pp. 1267–1277, 2020. doi: 10.25046/aj0506151
47. Puttakul Sakul-Ung, Amornvit Vatcharaphrueksadee, Pitiporn Ruchanawet, Kanin Kearpimy, Hathairat Ketmaneechairat, Maleerat Maliyaem, "Overmind: A Collaborative Decentralized Machine Learning Framework", Advances in Science, Technology and Engineering Systems Journal, vol. 5, no. 6, pp. 280–289, 2020. doi: 10.25046/aj050634
48. Pamela Zontone, Antonio Affanni, Riccardo Bernardini, Leonida Del Linz, Alessandro Piras, Roberto Rinaldo, "Supervised Learning Techniques for Stress Detection in Car Drivers", Advances in Science, Technology and Engineering Systems Journal, vol. 5, no. 6, pp. 22–29, 2020. doi: 10.25046/aj050603
49. Kodai Kitagawa, Koji Matsumoto, Kensuke Iwanaga, Siti Anom Ahmad, Takayuki Nagasaki, Sota Nakano, Mitsumasa Hida, Shogo Okamatsu, Chikamune Wada, "Posture Recognition Method for Caregivers during Postural Change of a Patient on a Bed using Wearable Sensors", Advances in Science, Technology and Engineering Systems Journal, vol. 5, no. 5, pp. 1093–1098, 2020. doi: 10.25046/aj0505133
50. Khalid A. AlAfandy, Hicham Omara, Mohamed Lazaar, Mohammed Al Achhab, "Using Classic Networks for Classifying Remote Sensing Images: Comparative Study", Advances in Science, Technology and Engineering Systems Journal, vol. 5, no. 5, pp. 770–780, 2020. doi: 10.25046/aj050594
51. Khalid A. AlAfandy, Hicham, Mohamed Lazaar, Mohammed Al Achhab, "Investment of Classic Deep CNNs and SVM for Classifying Remote Sensing Images", Advances in Science, Technology and Engineering Systems Journal, vol. 5, no. 5, pp. 652–659, 2020. doi: 10.25046/aj050580
52. Rajesh Kumar, Geetha S, "Malware Classification Using XGboost-Gradient Boosted Decision Tree", Advances in Science, Technology and Engineering Systems Journal, vol. 5, no. 5, pp. 536–549, 2020. doi: 10.25046/aj050566
53. Nghia Duong-Trung, Nga Quynh Thi Tang, Xuan Son Ha, "Interpretation of Machine Learning Models for Medical Diagnosis", Advances in Science, Technology and Engineering Systems Journal, vol. 5, no. 5, pp. 469–477, 2020. doi: 10.25046/aj050558
54. Oumaima Terrada, Soufiane Hamida, Bouchaib Cherradi, Abdelhadi Raihani, Omar Bouattane, "Supervised Machine Learning Based Medical Diagnosis Support System for Prediction of Patients with Heart Disease", Advances in Science, Technology and Engineering Systems Journal, vol. 5, no. 5, pp. 269–277, 2020. doi: 10.25046/aj050533
55. Haytham Azmi, "FPGA Acceleration of Tree-based Learning Algorithms", Advances in Science, Technology and Engineering Systems Journal, vol. 5, no. 5, pp. 237–244, 2020. doi: 10.25046/aj050529
56. Hicham Moujahid, Bouchaib Cherradi, Oussama El Gannour, Lhoussain Bahatti, Oumaima Terrada, Soufiane Hamida, "Convolutional Neural Network Based Classification of Patients with Pneumonia using X-ray Lung Images", Advances in Science, Technology and Engineering Systems Journal, vol. 5, no. 5, pp. 167–175, 2020. doi: 10.25046/aj050522
57. Young-Jin Park, Hui-Sup Cho, "A Method for Detecting Human Presence and Movement Using Impulse Radar", Advances in Science, Technology and Engineering Systems Journal, vol. 5, no. 4, pp. 770–775, 2020. doi: 10.25046/aj050491
58. Anouar Bachar, Noureddine El Makhfi, Omar EL Bannay, "Machine Learning for Network Intrusion Detection Based on SVM Binary Classification Model", Advances in Science, Technology and Engineering Systems Journal, vol. 5, no. 4, pp. 638–644, 2020. doi: 10.25046/aj050476
59. Adonis Santos, Patricia Angela Abu, Carlos Oppus, Rosula Reyes, "Real-Time Traffic Sign Detection and Recognition System for Assistive Driving", Advances in Science, Technology and Engineering Systems Journal, vol. 5, no. 4, pp. 600–611, 2020. doi: 10.25046/aj050471
60. Amar Choudhary, Deependra Pandey, Saurabh Bhardwaj, "Overview of Solar Radiation Estimation Techniques with Development of Solar Radiation Model Using Artificial Neural Network", Advances in Science, Technology and Engineering Systems Journal, vol. 5, no. 4, pp. 589–593, 2020. doi: 10.25046/aj050469
61. Maroua Abdellaoui, Dounia Daghouj, Mohammed Fattah, Younes Balboul, Said Mazer, Moulhime El Bekkali, "Artificial Intelligence Approach for Target Classification: A State of the Art", Advances in Science, Technology and Engineering Systems Journal, vol. 5, no. 4, pp. 445–456, 2020. doi: 10.25046/aj050453
62. Shahab Pasha, Jan Lundgren, Christian Ritz, Yuexian Zou, "Distributed Microphone Arrays, Emerging Speech and Audio Signal Processing Platforms: A Review", Advances in Science, Technology and Engineering Systems Journal, vol. 5, no. 4, pp. 331–343, 2020. doi: 10.25046/aj050439
63. Ilias Kalathas, Michail Papoutsidakis, Chistos Drosos, "Optimization of the Procedures for Checking the Functionality of the Greek Railways: Data Mining and Machine Learning Approach to Predict Passenger Train Immobilization", Advances in Science, Technology and Engineering Systems Journal, vol. 5, no. 4, pp. 287–295, 2020. doi: 10.25046/aj050435
64. Yosaphat Catur Widiyono, Sani Muhamad Isa, "Utilization of Data Mining to Predict Non-Performing Loan", Advances in Science, Technology and Engineering Systems Journal, vol. 5, no. 4, pp. 252–256, 2020. doi: 10.25046/aj050431
65. Hai Thanh Nguyen, Nhi Yen Kim Phan, Huong Hoang Luong, Trung Phuoc Le, Nghi Cong Tran, "Efficient Discretization Approaches for Machine Learning Techniques to Improve Disease Classification on Gut Microbiome Composition Data", Advances in Science, Technology and Engineering Systems Journal, vol. 5, no. 3, pp. 547–556, 2020. doi: 10.25046/aj050368
66. Ruba Obiedat, "Risk Management: The Case of Intrusion Detection using Data Mining Techniques", Advances in Science, Technology and Engineering Systems Journal, vol. 5, no. 3, pp. 529–535, 2020. doi: 10.25046/aj050365
67. Krina B. Gabani, Mayuri A. Mehta, Stephanie Noronha, "Racial Categorization Methods: A Survey", Advances in Science, Technology and Engineering Systems Journal, vol. 5, no. 3, pp. 388–401, 2020. doi: 10.25046/aj050350
68. Dennis Luqman, Sani Muhamad Isa, "Machine Learning Model to Identify the Optimum Database Query Execution Platform on GPU Assisted Database", Advances in Science, Technology and Engineering Systems Journal, vol. 5, no. 3, pp. 214–225, 2020. doi: 10.25046/aj050328
69. Gillala Rekha, Shaveta Malik, Amit Kumar Tyagi, Meghna Manoj Nair, "Intrusion Detection in Cyber Security: Role of Machine Learning and Data Mining in Cyber Security", Advances in Science, Technology and Engineering Systems Journal, vol. 5, no. 3, pp. 72–81, 2020. doi: 10.25046/aj050310
70. Ahmed EL Orche, Mohamed Bahaj, "Approach to Combine an Ontology-Based on Payment System with Neural Network for Transaction Fraud Detection", Advances in Science, Technology and Engineering Systems Journal, vol. 5, no. 2, pp. 551–560, 2020. doi: 10.25046/aj050269
71. Bokyoon Na, Geoffrey C Fox, "Object Classifications by Image Super-Resolution Preprocessing for Convolutional Neural Networks", Advances in Science, Technology and Engineering Systems Journal, vol. 5, no. 2, pp. 476–483, 2020. doi: 10.25046/aj050261
72. Johannes Linden, Xutao Wang, Stefan Forsstrom, Tingting Zhang, "Productify News Article Classification Model with Sagemaker", Advances in Science, Technology and Engineering Systems Journal, vol. 5, no. 2, pp. 13–18, 2020. doi: 10.25046/aj050202
73. Michael Wenceslaus Putong, Suharjito, "Classification Model of Contact Center Customers Emails Using Machine Learning", Advances in Science, Technology and Engineering Systems Journal, vol. 5, no. 1, pp. 174–182, 2020. doi: 10.25046/aj050123
74. Rehan Ullah Khan, Ali Mustafa Qamar, Mohammed Hadwan, "Quranic Reciter Recognition: A Machine Learning Approach", Advances in Science, Technology and Engineering Systems Journal, vol. 4, no. 6, pp. 173–176, 2019. doi: 10.25046/aj040621
75. Mehdi Guessous, Lahbib Zenkouar, "An ML-optimized dRRM Solution for IEEE 802.11 Enterprise Wlan Networks", Advances in Science, Technology and Engineering Systems Journal, vol. 4, no. 6, pp. 19–31, 2019. doi: 10.25046/aj040603
76. Toshiyasu Kato, Yuki Terawaki, Yasushi Kodama, Teruhiko Unoki, Yasushi Kambayashi, "Estimating Academic results from Trainees’ Activities in Programming Exercises Using Four Types of Machine Learning", Advances in Science, Technology and Engineering Systems Journal, vol. 4, no. 5, pp. 321–326, 2019. doi: 10.25046/aj040541
77. Nindhia Hutagaol, Suharjito, "Predictive Modelling of Student Dropout Using Ensemble Classifier Method in Higher Education", Advances in Science, Technology and Engineering Systems Journal, vol. 4, no. 4, pp. 206–211, 2019. doi: 10.25046/aj040425
78. Fernando Hernández, Roberto Vega, Freddy Tapia, Derlin Morocho, Walter Fuertes, "Early Detection of Alzheimer’s Using Digital Image Processing Through Iridology, An Alternative Method", Advances in Science, Technology and Engineering Systems Journal, vol. 4, no. 3, pp. 126–137, 2019. doi: 10.25046/aj040317
79. Abba Suganda Girsang, Andi Setiadi Manalu, Ko-Wei Huang, "Feature Selection for Musical Genre Classification Using a Genetic Algorithm", Advances in Science, Technology and Engineering Systems Journal, vol. 4, no. 2, pp. 162–169, 2019. doi: 10.25046/aj040221
80. Konstantin Mironov, Ruslan Gayanov, Dmiriy Kurennov, "Observing and Forecasting the Trajectory of the Thrown Body with use of Genetic Programming", Advances in Science, Technology and Engineering Systems Journal, vol. 4, no. 1, pp. 248–257, 2019. doi: 10.25046/aj040124
81. Bok Gyu Han, Hyeon Seok Yang, Ho Gyeong Lee, Young Shik Moon, "Low Contrast Image Enhancement Using Convolutional Neural Network with Simple Reflection Model", Advances in Science, Technology and Engineering Systems Journal, vol. 4, no. 1, pp. 159–164, 2019. doi: 10.25046/aj040115
82. Zheng Xie, Chaitanya Gadepalli, Farideh Jalalinajafabadi, Barry M.G. Cheetham, Jarrod J. Homer, "Machine Learning Applied to GRBAS Voice Quality Assessment", Advances in Science, Technology and Engineering Systems Journal, vol. 3, no. 6, pp. 329–338, 2018. doi: 10.25046/aj030641
83. Richard Osei Agjei, Emmanuel Awuni Kolog, Daniel Dei, Juliet Yayra Tengey, "Emotional Impact of Suicide on Active Witnesses: Predicting with Machine Learning", Advances in Science, Technology and Engineering Systems Journal, vol. 3, no. 5, pp. 501–509, 2018. doi: 10.25046/aj030557
84. Sudipta Saha, Aninda Saha, Zubayr Khalid, Pritam Paul, Shuvam Biswas, "A Machine Learning Framework Using Distinctive Feature Extraction for Hand Gesture Recognition", Advances in Science, Technology and Engineering Systems Journal, vol. 3, no. 5, pp. 72–81, 2018. doi: 10.25046/aj030510
85. Charles Frank, Asmail Habach, Raed Seetan, Abdullah Wahbeh, "Predicting Smoking Status Using Machine Learning Algorithms and Statistical Analysis", Advances in Science, Technology and Engineering Systems Journal, vol. 3, no. 2, pp. 184–189, 2018. doi: 10.25046/aj030221
86. Sehla Loussaief, Afef Abdelkrim, "Machine Learning framework for image classification", Advances in Science, Technology and Engineering Systems Journal, vol. 3, no. 1, pp. 1–10, 2018. doi: 10.25046/aj030101
87. Ruijian Zhang, Deren Li, "Applying Machine Learning and High Performance Computing to Water Quality Assessment and Prediction", Advances in Science, Technology and Engineering Systems Journal, vol. 2, no. 6, pp. 285–289, 2017. doi: 10.25046/aj020635
88. Batoul Haidar, Maroun Chamoun, Ahmed Serhrouchni, "A Multilingual System for Cyberbullying Detection: Arabic Content Detection using Machine Learning", Advances in Science, Technology and Engineering Systems Journal, vol. 2, no. 6, pp. 275–284, 2017. doi: 10.25046/aj020634
89. Yuksel Arslan, Abdussamet Tanıs, Huseyin Canbolat, "A Relational Database Model and Tools for Environmental Sound Recognition", Advances in Science, Technology and Engineering Systems Journal, vol. 2, no. 6, pp. 145–150, 2017. doi: 10.25046/aj020618
90. Loretta Henderson Cheeks, Ashraf Gaffar, Mable Johnson Moore, "Modeling Double Subjectivity for Gaining Programmable Insights: Framing the Case of Uber", Advances in Science, Technology and Engineering Systems Journal, vol. 2, no. 3, pp. 1677–1692, 2017. doi: 10.25046/aj0203209
91. Moses Ekpenyong, Daniel Asuquo, Samuel Robinson, Imeh Umoren, Etebong Isong, "Soft Handoff Evaluation and Efficient Access Network Selection in Next Generation Cellular Systems", Advances in Science, Technology and Engineering Systems Journal, vol. 2, no. 3, pp. 1616–1625, 2017. doi: 10.25046/aj0203201
92. Rogerio Gomes Lopes, Marcelo Ladeira, Rommel Novaes Carvalho, "Use of machine learning techniques in the prediction of credit recovery", Advances in Science, Technology and Engineering Systems Journal, vol. 2, no. 3, pp. 1432–1442, 2017. doi: 10.25046/aj0203179
93. Daniel Fraunholz, Marc Zimmermann, Hans Dieter Schotten, "Towards Deployment Strategies for Deception Systems", Advances in Science, Technology and Engineering Systems Journal, vol. 2, no. 3, pp. 1272–1279, 2017. doi: 10.25046/aj0203161
94. Arsim Susuri, Mentor Hamiti, Agni Dika, "Detection of Vandalism in Wikipedia using Metadata Features – Implementation in Simple English and Albanian sections", Advances in Science, Technology and Engineering Systems Journal, vol. 2, no. 4, pp. 1–7, 2017. doi: 10.25046/aj020401
95. Adewale Opeoluwa Ogunde, Ajibola Rasaq Olanbo, "A Web-Based Decision Support System for Evaluating Soil Suitability for Cassava Cultivation", Advances in Science, Technology and Engineering Systems Journal, vol. 2, no. 1, pp. 42–50, 2017. doi: 10.25046/aj020105