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Cyberbullying Sexism Harassment Identification by Metaheurustics-Tuned eXtreme Gradient Boosting

Computers, Materials and Continua 2024年第3期80卷 4997-5027页

作者： dobrojevic, milos Jovanovic, Luka Babic, Lepa Cajic, Miroslav Zivkovic, Tamara Zivkovic, Miodrag Muthusamy, Suresh Antonijevic, milos Bacanin, Nebojsa Technical Faculty Singidunum University Belgrade 11000 Serbia Informatics and Computing Singidunum University Belgrade 11000 Serbia Business Economics Singidunum University Belgrade 11000 Serbia Computing and Informatics Sinergija University Bijeljina 76300 Bosnia and Herzegovina Department for Information Systems and Technologies University "Union Nikola Tesla" Cara Dusana Belgrade 11080 Serbia Department for Computer Science and Informatics School of Electrical Engineering University of Belgrade Belgrade 11000 Serbia Department of Electrical and Electronics Engineering Kongu Engineering College (Autonomous) Perundurai Erode 638060 India Department of Mathematics Saveetha School of Engineering (Deemed to be University) SIMATS Thandalam Chennai 602105 India MEU Research Unit Middle East University Amman 11831 Jordan

Cyberbullying is a form of harassment or bullying that takes place online or through digital devices like smart-phones, computers, or tablets. It can occur through various channels, such as social media, text messages, online forums, or gaming platforms. Cyberbullying involves using technology to intentionally harm, harass, or intimidate others and may take different forms, including exclusion, doxing, impersonation, harassment, and cyberstalking. Unfortunately, due to the rapid growth of malicious internet users, this social phenomenon is becoming more frequent, and there is a huge need to address this issue. Therefore, the main goal of the research proposed in this manuscript is to tackle this emerging challenge. A dataset of sexist harassment on Twitter, containing tweets about the harassment of people on a sexual basis, for natural language processing (NLP), is used for this purpose. Two algorithms are used to transform the text into a meaningful representation of numbers for machine learning (ML) input: Term frequency inverse document frequency (TF-IDF) and Bidirectional encoder representations from transformers (BERT). The well-known eXtreme gradient boosting (XGBoost) ML model is employed to classify whether certain tweets fall into the category of sexual-based harassment or not. Additionally, with the goal of reaching better performance, several XGBoost models were devised conducting hyperparameter tuning by metaheuristics. For this purpose, the recently emerging Coyote optimization algorithm (COA) was modified and adjusted to optimize the XGBoost model. Additionally, other cutting-edge metaheuristics approach for this challenge were also implemented, and rigid comparative analysis of the captured classification metrics (accuracy, Cohen kappa score, precision, recall, and F1-score) was performed. Finally, the best-generated model was interpreted by Shapley additive explanations (SHAP), and useful insights were gained about the behavioral patterns of people w

关键词： Smartphones

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Therapeutic approach to emotional reactions accompanied with thermal skin injury–from basic to epidemiological research

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World Journal of Psychiatry 2024年第2期14卷 199-203页

作者： Bojana Krstic milos Krstic Dragica Selakovic Nemanja Jovicic Gvozden Rosic Department of Physiology Faculty of Medical SciencesUniversity of KragujevacKragujevac 34000Serbia Department of Histology and Embryology Faculty of Medical SciencesUniversity of KragujevacKragujevac 34000Serbia

In this editorial,we discuss the status of a therapeutic approach to emotional reactions accompanying thermal skin *** are considered a major health problem,as well as an economic and social problem,with potentially devastating and life-changing *** affect a wide range of patients with different damage mechanisms,varied depths,and localizations of the *** most common are thermal burns,with more than 11 million occurrences annually according to the World Health Organization *** skin injuries are among the most tragic and catastrophic injuries,almost unsurpassed in terms of severity,morbidity,and mortality,as well as functional,aesthetic,social,economic,and psychological *** survivors face stress,anxiety,depression,low self-esteem,body deformity,social isolation,unemployment,financial burden,and family *** advances in acute burn care have allowed researchers and physicians to pay more attention to other effects of burns,focusing on psychological consequences in *** from the significant improvements in routine protocols,it seems useful to take care of psychological disturbances that occur simultaneously but may emerge as the most lasting outcome of those *** that sense,various standards and additional approaches may be involved to achieve overall recovery.

关键词： Thermal skin injury Anxiety Depression Psychological consequences of burns

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Non-thermal atmospheric-pressure positive pulsating corona discharge in degradation of textile dye Reactive Blue 19 enhanced by Bi_(2)O_(3) catalyst

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Plasma Science and Technology 2024年第2期26卷 104-113页

作者： Milica PETROVIC Dragan RADIVOJEVIC Sasa RANCEV Nena VELINOV milos KOSTIC Danijela BOJIC Aleksandar BOJIC Department of Chemistry Faculty of Sciences and MathematicsUniversity of NisNis 18000Serbia Department of Physics Faculty of Sciences and MathematicsUniversity of NisNis 18000Serbia

In this work,monoclinic Bi_(2)O_(3) was applied for the first time,to the best of our knowledge,as a catalyst in the process of dye degradation by a non-thermal atmospheric-pressure positive pulsating corona *** research focused on the interaction of the plasma-generated species and the catalyst,as well as the role of the catalyst in the degradation *** decomposition of the anthraquinone reactive dye Reactive Blue 19(RB 19) was performed in a selfmade reactor ***_(2)O_(3) was prepared by electrodeposition followed by thermal treatment,and characterized by x-ray diffraction,scanning electron microscopy and energy-dispersive xray *** was observed that the catalyst promoted decomposition of plasma-generated H_(2)O_(2) into ·OH radicals,the principal dye-degrading reagent,which further attacked the dye *** catalyst improved the decolorization rate by 2.5 times,the energy yield by 93.4%and total organic carbon removal by 7.1%.Excitation of the catalyst mostly occurred through strikes by plasma-generated reactive ions and radical species from the air,accelerated by the electric field,as well as by fast electrons with an energy of up to 15 eV generated by the streamers reaching the liquid *** strikes transferred the energy to the catalyst and created the electrons and holes,which further reacted with H_(2)O_(2) and water,producing ·OH *** was indentified as the primary role of the catalyst in this *** reactions followed pseudo first-order *** of H_(2)O_(2) and the dye degradation rate increased with increase in the input *** optimal catalyst dose was 500 mg·dm^(-3).The decolorization rate was a little lower in river water compared with that in deionized water due to the side reactions of ·OH radicals with organic matter and inorganic ions dissolved in the river water.

关键词： corona RB 19 Bi_(2)O_(3) catalyst degradation

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Tree structure and diversity shape the biomass of primary temperate mountain forests

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Forest Ecosystems 2024年第4期11卷 568-579页

作者： Dheeraj Ralhan Ruffy Rodrigo Heather Keith Annemiek Irene Stegehuis Jakob Pavlin Yumei Jiang milos Rydval Juliana Nogueira Alexandre Fruleux Marek Svitok Martin Mikolas Daniel Kozak Martin Dusatko Pavel Janda Oleh Chaskovsky Catalin-Constantin Roibu Miroslav Svoboda Czech University of Life Sciences Prague Faculty of Forestry and Wood SciencesKamycka 129Suchdol16521 Praha 6Czech Republic Department of Forest Science Biliran Province State UniversityBiliran6549Philippines Griffith Climate Action Beacon Griffith UniversityParklands DriveSouthportGold CoastQueensland4222Australia Laboratoire de Geologie IPSLCNRSUMR 8538Ecole Normale SuperieurePSL UniversityParisFrance Univ.Lille Institut Mines-TelecomUniv.ArtoisJuniaULR 4515LGCgELaboratoire de Genie Civil et Geo-EnvironnementF-59000LilleFrance Department of Biology and General Ecology Faculty of Ecology and Environmental SciencesTechnical University in ZvolenMasaryka 2496001ZvolenSlovakia Institute of Forest Management Ukrainian National Forestry UniversityLvivUkraine Forest Biometrics Laboratory–Faculty of Forestry Stefan Cel Mare University of SuceavaUniversitații Street Number.13Suceava720229Romania

Primary forests are spatially diverse terrestrial ecosystems with unique characteristics,being naturally regenerative and heterogeneous,which supports the stability of their carbon storage through the accumulation of live and dead ***,little is known about the interactions between biomass stocks,tree genus diversity and structure across a temperate montane primary ***,we investigated the relationship between tree structure(variability in basal area and tree size),genus-level diversity(abundance,tree diversity)and biomass stocks in temperate primary mountain forests across Central and Eastern *** used inventory data from726 permanent sample plots from mixed beech and spruce across the Carpathian *** used nonlinear regression to analyse the spatial variability in forest biomass,structure,and genus-level diversity and how they interact with plot-level tree age,disturbances,temperature and *** found that the combined effects of genus and structural indices were important for addressing the variability in biomass across different spatial *** processes in disturbance regimes and uneven tree age support forest hete rogeneity and the accumulation of live and dead biomass through the natural regeneration,growth and decay of the forest *** complexities in basal area index,supporte d by genus-level abundance,positively influence total biomass stocks,which was modulated by tree age and *** forests showed higher tree density and basal area than mixed beech forests,though mixed beech still contributes significantly to biomass across *** heterogeneity was strongly influenced by complexities in forest composition(tree genus diversity,structure).We addressed the importance of primary forests as stable carbon stores,achieved through structure and *** such ecosystems is critical for ensuring the stability of the primary forest,carbon store and biodiversity into the future.

关键词： Biodiversity indicators Biomass carbon stock Ecosystem functioning Forest composition Primary forest structure Tree size distribution

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Improving localization precision of Brillouin measurements using spectral autocorre lation analysis

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Journal of Innovative Optical Health Sciences 2017年第6期10卷 35-42页

作者： Eitan Edrei milos Nikolic Giuliano Scarcelli Fischell Department of Bioengineering University of Maryland College ParkMaryland 20742USA

Brillouin spectroscopy is a powerful tool for measuring the mechanical properties of materials without *** sensitivity to mechanical changes that a Brillouin spectrometer can detect is determined by the precision to which a spectral peak can be *** localization precision is however fundamentally limited by the low mumber of photons within a Brillouin measurement,as wel as by intrinsic noise of the ***,we present a method to improve the spectral sensitivity of Brillouin measurements by exploiting the autocorelation function of the *** show that by performing a localization process on the autocorrelation function nearly 20%increase in localizat ion precision can be *** result is consistent bet ween our theoretical treatment,numerical simulation and experimental *** further study the efect of back-ground noise on the precision im provement for realistic scenarios.

关键词： Brillouin microscopy localization

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Impact of alpha-synuclein pathology on adult neurogenesis: evidence for multilayered mechanisms

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Neural Regeneration Research 2022年第7期17卷 1491-1492页

作者： Jana Bonsberger Franziska Richter milos Stanojlovic Department of Pharmacology Toxicology and PharmacyUniversity of Veterinary MedicineHannoverGermany

Parkinson’s disease(PD)is the second most common neurodegenerative disease affecting 8–10 million people ***,PD is the fastest-growing neurodegenerative disease and it is predicted that the number of patients will double in the next thirty ***,PD is characterized by the presence of protein aggregations called Lewy bodies(LB)and by degeneration of dopaminergic neurons in the substantia nigra pars compacta.

关键词： degeneration pathology Impact

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Simulation-based correction of dose enhancement factor values in photon brachytherapy with metal nanoparticle targeting

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Nuclear Science and Techniques 2020年第11期31卷 93-106页

作者： Slobodan Milutinovic milos Vujisic School of Electrical Engineering University of BelgradeBelgradeSerbia Vinca Institute of Nuclear Sciences-National Institute of tht Republic of Serbia University of BelgradeBelgradeSerbia

The purpose of this study is to investigate and quantify the influence of nanoparticle composition,size,and concentration on the difference between dose enhancement values derived from Monte Carlo simulations with homogeneous and structured geometrical representations of the target region in metal nanoparticle-enhanced photon *** of the dose enhancement factor(DEF)were calculated for Pd-103,I-125,and Cs-131 brachytherapy sources with gold,silver,or platinum nanoparticles acting as targeting *** were performed using the Geant4 toolkit with condensed history models of electron *** limits were imposed on adjustable parameters that define secondary electron histories,so that simulations came closest to true event-byevent electron tracking,thereby allowing part of the nanoparticle-laden volume used for calculating the dose to be represented as a structured region with uniformly distributed discrete ***-tuned physical models of secondary radiation emission and propagation,along with the discrete geometrical representation of nanoparticles,result in a more realistic assessment of dose *** DEF correction coefficient is introduced as a metric that quantifies the absorption of secondary radiation inside the nanoparticles themselves,a phenomenon disregarded when the target region is treated as a homogeneous metal–tissue mixture,but accounted for by discrete nanoparticle *** approach applied to correcting DEF values both draws from and expands upon several related investigations published *** of the obtained results to those found in relevant references shows both agreement and deviation,depending on nanoparticle properties and photon energy.

关键词： Monte Carlo Brachytherapy Nanoparticles Dose enhancement Geant4

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Influence of Chemical Precleaning on the Plasma Treatment Efficiency of Aluminum by RF Plasma Pencil

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Plasma Science and Technology 2016年第4期18卷 430-437页

作者： Vadym PRYSIAZHNYI Pavel SLAVICEK Eliska MIKMEKOVA milos KLIMA Masaryk University Faculty of Science Institute of Scientific Instruments of the ASCR v.v.i.

This paper is aimed to show the influence of initial chemical pretreatment prior to subsequent plasma activation of aluminum *** results of our study showed that the state of the topmost surface layer（*** surface morphology and chemical groups）of plasma modified aluminum significantly depends on the chemical *** used chemicals（isopropanol,trichlorethane,solution of Na OH in deionized water）were used as precleaning *** plasma treatments were done using a radio frequency driven atmospheric pressure plasma pencil developed at Masaryk University,which operates in Ar,Ar/O_2 gas *** effectiveness of the plasma treatment was estimated by the wettability measurements,showing high wettability improvement already after 0.3 s *** effects of surface cleaning（hydrocarbon removal）,surface oxidation and activation（generation of OH groups）were estimated using infrared *** changes in the surface morphology were measured using scanning electron *** emission spectroscopy measurements in the near-to-surface region with temperature calculations showed that plasma itself depends on the sample precleaning procedure.

关键词： atmospheric pressure plasma plasma jet aluminum surface treatment surface processing chemical precleaning

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Adaptability of language-related brain network in a low-grade glioma patient

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Neural Regeneration Research 2011年第30期6卷 2372-2375页

作者： Olivera Sveljo Katarina Koprivsek milos Lucic Diagnostic Imaging Centre Oncology Institute of VojvodinaSremska KamenicaSerbia

Because functional magnetic resonance imaging can be used for dynamic observation of functional cortical changes after brain injuries, we followed up functional magnetic resonance imaging manifestations of a language-related brain network in a low-grade glioma patient. Disease progression and therapy during a 3-year period were followed up at different time points： before and after reoperation, after radiation therapy, and 1 year after irradiation. During the whole 3-year follow-up period, the patient exhibited no neurological deficits while functional magnetic resonance imaging revealed different topologies of the language-related brain network. During disease progression and after irradiation, the language-related brain network was extended or completely transferred to the nondominant （right） hemisphere. In addition, after reoperation and 1 year after irradiation, language areas were primarily found in the language dominant （left） hemisphere. Our results suggest a high level of adaptability of the language-related cortical network of the bilateral hemispheres in this low-grade glioma patient.

关键词： functional magnetic resonance imaging low-grade glioma cortical changes language-related brain network

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Hybrid simulation using implicit solver coupling with HLA and FMI

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International Journal of Modeling, Simulation, and Scientific Computing 2017年第4期8卷 224-244页

作者： Muhammad Usman Awais milos Cvetkovic and Peter Palensky National University of Computing and Emerging Science LahorePakistan Department of Electrical Engineering Mathematics and Computer Science TU Delft Building 36Room B36-LB 03.230 Mekelweg 42628CD DelftNetherlands

Hybrid systems such as Cyber Physical System(CPS)are becoming increasingly popular,mainly due to the involvement of information technology in different aspects of *** analysis and verification of hybrid system models,simulation is used *** parts of a common hybrid system may belong to different domains of study,it is sometimes beneficial to use specialized simulation packages(SPs)for each *** this case,parts of a system are simulated in different *** idea may seem simple,but coupling more than one simulation component presents challenges related to numerical *** presented article suggests an implicit solver coupling technique enhanced to facilitate simulation of hybrid models using multiple simulation *** technique is developed using two of the most popular simulation interoperability standards,namely,the High Level Architecture and the Functional Mock-up *** using these standards,the developed algorithm will be useful for a large number of practitioners and *** developed algorithm is described using a generic distributed computation model,which makes it reproducible even without using the *** the verification of results,the algorithm is tested on two case *** results are compared to a monolithic simulator and the proximity of results initiates the validity of the developed algorithm.

关键词： Distributed simulation algorithms co-simulation distributed simulation parallel simulation continuous simulation simulation interoperability DEVS OpenModelica Modelica

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