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Solid-state impedance spectroscopy studies of dielectric properties and relaxation processes in Na_(2)O–V_(2)O_(5)–Nb_(2)O_(5)–P_(2)O_(5) glass

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International Journal of Minerals,Metallurgy and Materials 2024年第1期31卷 186-196页

作者： Sara Marijan luka Pavic Division of Materials Chemistry Ruđer Boskovic InstituteBijenicka 54HR-10000 ZagrebCroatia

Solid-state impedance spectroscopy(SS-IS)was used to investigate the influence of structural modifications resulting from the addition of Nb2O5 on the dielectric properties and relaxation processes in the quaternary mixed glass former(MGF)system 35Na_(2)O–10V_(2)O_(5)–(55-x)P_(2)O_(5)–xNb_(2)O_(5)(x=0–40,mol%).The dielectric parameters,including the dielectric strength and dielectric loss,are determined from the frequency and temperature-dependent complex permittivity data,revealing a significant dependence on the Nb2O5 *** transition from a predominantly phosphate glass network(x<10,region I)to a mixed niobate–phosphate glass net-work(10≤x≤20,region II)leads to an increase in the dielectric parameters,which correlates with the observed trend in the direct-cur-rent(DC)*** the predominantly niobate network(x≥25,region III),the highly polarizable nature of Nb5+ions leads to a fur-ther increase in the dielectric permittivity and dielectric *** is particularly evident in Nb-40 glass-ceramic,which contains Na_(13)Nb_(35)O_(94) crystalline phase with a tungsten bronze structure and exhibits the highest dielectric permittivity of 61.81 and the lowest loss factor of 0.032 at 303 K and 10 *** relaxation studies,analyzed through modulus formalism and complex impedance data,show that DC conductivity and relaxation processes are governed by the same mechanism,attributed to ionic *** contrast to glasses with a single peak in frequency dependence of imaginary part of electrical modulus,M″(ω),Nb-40 glass-ceramic exhibits two distinct contributions with similar relaxation *** high-frequency peak indicates bulk ionic conductivity,while the additional low-fre-quency peak is associated with the grain boundary effect,confirmed by the electrical equivalent circuit(EEC)*** scaling characteristics of permittivity and conductivity spectra,along with the electrical modulus,validate time-temperature superposition and demonstrate a

关键词： phosphate glasses glass-ceramics impedance spectroscopy dielectric properties relaxation processes permittivity scaling conductivity scaling modulus formalism

Cyberbullying Sexism Harassment Identification by Metaheurustics-Tuned eXtreme Gradient Boosting

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Computers, Materials & Continua 2024年第9期80卷 4997-5027页

作者： Milos Dobrojevic luka Jovanovic Lepa Babic Miroslav Cajic Tamara Zivkovic Miodrag Zivkovic Suresh Muthusamy Milos Antonijevic Nebojsa Bacanin Technical Faculty Singidunum UniversityBelgrade11000Serbia Informatics and Computing Singidunum UniversityBelgrade11000Serbia Business Economics Singidunum UniversityBelgrade11000Serbia Computing and Informatics Sinergija UniversityBijeljina76300Bosnia and Herzegovina Department for Information Systems and Technologies University“Union Nikola Tesla”Cara DusanaBelgrade11080Serbia Department for Computer Science and Informatics School of Electrical EngineeringUniversity of BelgradeBelgrade11000Serbia Department of Electrical and Electronics Engineering Kongu Engineering College(Autonomous)PerunduraiErode638060India Department of Mathematics Saveetha School of Engineering(Deemed to be University)SIMATS ThandalamChennai602105India MEU Research Unit Middle East UniversityAmman11831Jordan

Cyberbullying is a form of harassment or bullying that takes place online or through digital devices like smartphones,computers,or *** can occur through various channels,such as social media,text messages,online forums,or gaming *** involves using technology to intentionally harm,harass,or intimidate others and may take different forms,including exclusion,doxing,impersonation,harassment,and ***,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 ***,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 *** 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 ***,with the goal of reaching better performance,several XGBoost models were devised conducting hyperparameter tuning by *** this purpose,the recently emerging Coyote optimization algorithm(COA)was modified and adjusted to optimize the XGBoost ***,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 ***,the best-generated model was interpreted by Shapley additive explanations(SHAP),and useful insights were gained about the behavioral patterns of people who perform social harassment.

关键词： Coyote optimization algorithm NLP TF-IDF BERT XGBoost online harassment and cyberbullying metaheuristics

帝国主义理论在中国的再阐释——以瞿秋白为线索

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开放时代 2024年第4期 96-108,M0006页

作者：路卡清华大学人文与社会科学高等研究所

帝国主义问题在20世纪共产主义运动的理论脉络中扮演了重要的角色。这类命题在马克思主义思想领域开辟了新的批评视域,也直接促使共产主义运动从一场源于西欧的工人运动扩展为全球范围的革命实践。中国语境中的帝国主义问题是中国共产... 详细信息

帝国主义问题在20世纪共产主义运动的理论脉络中扮演了重要的角色。这类命题在马克思主义思想领域开辟了新的批评视域,也直接促使共产主义运动从一场源于西欧的工人运动扩展为全球范围的革命实践。中国语境中的帝国主义问题是中国共产党革命实践中的关键话题,而瞿秋白对其做了开创性的贡献。重新检视瞿秋白在20世纪20年代初期所参与的两次论争,有助于我们追溯帝国主义理论在中国的传播和再阐释过程。瞿秋白通过调动第三国际语境中的帝国主义理论,对中国的半殖民地处境展开了深入的阐释,从危机的社会形态、畸形政治经济关系与国际依附地位等多重层面,论证了帝国主义时代中国的客体性,同时将相关的理论探析延伸到中国应如何超越其客体地位的革命政治构想上。

关键词：瞿秋白第三国际帝国主义民族解放运动

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如何重新激活民权文化革命的“历史使命”:瞿秋白对革命文艺大众化运动的探讨与构想

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文艺理论与批评 2024年第2期 37-51页

作者： [斯洛文尼亚]路卡清华大学人文与社会科学高等研究所

瞿秋白对“革命文艺大众化运动”的探讨与构想,在20世纪中国左翼文艺发展历程中占据极为重要的位置。瞿秋白的相关讨论,自觉地把左翼文艺问题与革命领导权关联起来,并通过界定其历史属性,赋予中国革命文艺运动以基本的斗争坐标和未来发... 详细信息

瞿秋白对“革命文艺大众化运动”的探讨与构想,在20世纪中国左翼文艺发展历程中占据极为重要的位置。瞿秋白的相关讨论,自觉地把左翼文艺问题与革命领导权关联起来,并通过界定其历史属性,赋予中国革命文艺运动以基本的斗争坐标和未来发展途径。同等重要的是,立于多数平民的政治维度,他观察到了中国文化空间的分裂状态,并且将弥合文化鸿沟看成革命文艺运动的内在动力和历史使命。基于这类观察和认知,瞿秋白从中国近代历史角度阐述了革命文艺大众化运动的“必要性”,并在此基础上,对其执行方案进行了分析和构思。瞿秋白的相关思考,在政治宣传、科学再现和形象思维等各个要素相互渗透、制约和弥补的多重关系中,形成了独有的革命文艺逻辑。

关键词：革命文艺大众化瞿秋白革命五四左联

Sodium-dependent glucose transporter 2 inhibitors effects on myocardial function in patients with type 2 diabetes and asymptomatic heart failure

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World Journal of Cardiology 2024年第8期16卷 448-457页

作者： Petra Grubić Rotkvić luka Rotkvić Ana Đuzel Čokljat Maja Cigrovski Berković Department of Cardiology University Hospital Centre ZagrebZagreb 10000Croatia Department of Cardiology Magdalena Clinic for Cardiovascular DiseaseKrapinske Toplice 49217Croatia Department of Internal Medicine General Hospital DubrovnikDubrovnik 20000Croatia Department for Sport and Exercise Medicine University of Zagreb Faculty of KinesiologyZagreb 10000Croatia

BACKGROUND Sodium-dependent glucose transporter 2 inhibitors(SGLT2i)have shown efficacy in reducing heart failure(HF)burden in a very heterogeneous groups of patients,raising doubts about some contemporary assumptions of their mechanism of *** previously published a prospective observational study that evaluated mechanisms of action of SGLT2i in patients with type 2 diabetes who were in HF stages A and B on dual hypoglycemic *** groups of patients were included in the study:the ones receiving SGLT2i as an add-on agent to metformin and the others on dipeptidyl peptidase-4 inhibitors as an add-on to metformin due to suboptimal glycemic *** To evaluate the outcomes regarding natriuretic peptide,oxidative stress,inflammation,blood pressure,heart rate,cardiac function,and body *** The study outcomes were examined by dividing each treatment arm into two subgroups according to baseline parameters of global longitudinal strain(GLS),N-terminal pro-brain natriuretic peptide,myeloperoxidase(MPO),high-sensitivity C-reactive protein(hsCRP),and systolic and diastolic blood *** evaluate the possible predictors of observed changes in the SGLT2i arm during follow-up,a rise in stroke volume index,body mass index(BMI)decrease,and lack of heart rate increase,linear regression analysis was *** There was a greater reduction of MPO,hsCRP,GLS,and blood pressure in the groups with higher baseline values of mentioned parameters irrespective of the therapeutic arm after 6 months of *** independent predictors of heart rate decrease were a reduction in early mitral inflow velocity to early diastolic mitral annular velocity at the interventricular septal annulus ratio and BMI,while the predictor of stroke volume index increase was SGLT2i therapy *** SGLT2i affect body composition,reduce cardiac load,improve diastolic/systolic function,and attenuate the sympathetic *** control contributes to the i

关键词： Sodium-dependent glucose transporter 2 inhibitors Dipeptidyl peptidase-4 inhibitors Type 2 diabetes mellitus Heart failure Diabetic cardiomyopathy Cardiovascular disease

Global warming scenarios for the Eastern Adriatic Sea indicate a higher risk of invasiveness of non-native marine organisms relative to current climate conditions

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Marine Life Science & Technology 2024年第1期6卷 143-154页

作者： Branko Glamuzina Lorenzo Vilizzi Marina Piria Ante Zuljevic Ana Bratos Cetinic Ana Pesic Branko Dragicevic Lovrenc Lipej Marijana Pecarevic Vlasta Bartulovic Sanja Grđan Ivan Cvitkovic Tatjana Dobroslavic Ana Fortic luka Glamuzina Borut Mavric Jovana Tomanic Marija Despalatovic Domen Trkov Marina Brailo Scepanovic Zoran Vidovic Predrag Simonovic Sanja Matic-Skoko Pero Tutman Department of Applied Ecology University of DubrovnikDubrovnikCroatia Department of Ecology and Vertebrate Zoology Faculty of Biology and Environmental ProtectionUniversity of LodzLodzPoland Faculty of Agriculture Department of FisheriesApicultureWildlife Management and Special ZoologyUniversity of ZagrebZagrebCroatia Institute of Oceanography and Fisheries SplitCroatia Institute of Marine Biology University of MontenegroKotorMontenegro National Institute of Biology Marine Biology Station PiranPiranSlovenia Teacher Education Faculty University of BelgradeBelgradeSerbia Faculty of Biology University of BelgradeBelgradeSerbia

Globally,marine bioinvasions threaten marine ecosystem structure and function,with the Mediterranean Sea being one of the most affected *** invasions are expected to increase due to climate *** conducted a risk screening of marine organisms(37 fishes,38 invertebrates,and 9 plants),both extant and‘horizon’(i.e.,not present in the area but likely to enter it).Based on expert knowledge for the Eastern Adriatic Sea coasts of Slovenia,Croatia,and Montenegro,screenings were conducted under both current and predicted climate conditions indicating with an increase in sea surface temperature and salinity of the Adriatic Sea together with changes in precipitation *** aims were to:(1)identify non-native extant and horizon marine species that may pose threats to native biodiversity and(2)evaluate the risk of invasiveness of the selected species under current and predicted climate *** the 84 species screened,there was an increase in those ranked as‘high risk’from 33(39.3%)under current climate conditions and to 47(56.0%)under global warming *** those ranked as‘very high’risk,the increase was from 6(7.1%)to 21(25.0%).Amongst the screened species,the already established high-risk species Pacific oyster Magallana gigas and Atlantic blue crab Callinectes sapidus represent a threat to ecosystem *** the under-representation of marine species in the current European Union List,the species we have ranked as high to very high risk should be included.

关键词： AS-ISK Early detection Introduction vectors/pathways Invasive species Rapid response

Example-based dynamic façade design using the façade daylighting performance improvement(FDPI)indicator

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Building Simulation 2023年第12期16卷 2261-2283页

作者： luka Akimov Andrey Bezborodov Vladimir Badenko Peter the Great Saint-Petersburg Polytechnic University 29 Polytechnicheskaya st.St.Petersburg195251Russian Federation Politecnico di Milano 32 Piazza Leonardo da VinciMilano20133Italy

It remains challenging to conduct an efficient dynamic façade *** this article authors try to address this issue introducing the façade daylighting performance improvement(FDPI)indicator aimed to evaluate the performance of a dynamic(adaptive)façade from its daylighting performance point of *** illustrate the FDPI application the authors introduced the preliminary dynamic façade concept for an office building located in Tel Aviv(Hot-summer Mediterranean Climate Csa)with further shape modification based on the daylighting performance analysis compared to the three alternatives representative of different typologies of dynamic faç*** Bahr,One Ocean and The University of Southern Denmark façade systems were simulated under the same weather and building conditions of the preliminary dynamic façade concept and were considered as a benchmark for the *** final dynamic façade concept elaborated by the authors in the preliminary comparative workflow showed noticeable daylight performance improvement with respect to the case studies comparative *** FDPI metric allowed to estimate a daylighting performance improvement of 43%of the final dynamic façade concept over the case study dynamic façade that showed the best performance in the daylighting simulations.

关键词： dynamic façade adaptive façade daylight performance performance evaluation façade daylighting performance Improvement

Integration of Utility Distributed Energy Resource Management System and Aggregators for Evolving Distribution System Operators

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Journal of Modern Power Systems and Clean Energy 2022年第2期10卷 277-285页

作者： luka Strezoski Harsha Padullaparti Fei Ding Murali Baggu the Department for Power Electronicsand TelecommunicationsFaculty of Technical SciencesUniversity of Novi SadNovi SadSerbiaand he is also with Schneider Electric DMS CompanyNovi SadSerbia Energy System Integration National Renewable Energy LaboratoryGoldenUSA

With the rapid integration of distributed energy resources(DERs),distribution utilities are faced with new and unprecedented *** challenges introduced by high penetra-tion of DERs range from poor observability to overload and reverse power flow problems,under-/over-voltages,maloperation of legacy protection systems,and requirements for new planning *** utility personnel are not adequately trained,and legacy control centers are not properly equipped to cope with these ***,distribution energy resource management systems(DERMSs)are emerging software technologies aimed to provide distribution system operators(DSOs)with a specialized set of tools to enable them to overcome the issues caused by DERs and to maximize the benefits of the presence of high penetration of these novel ***,as DERMS technology is still emerging,its definition is vague and can refer to very different levels of software hierarchies,spanning from decentralized virtual power plants to DER aggregators and fully centralized enterprise systems(called utility DERMS).Although they are all frequently simply called DERIMS,these software technologies have different sets of tools and aim to provide different services to different *** paper explores how these different software technologies can complement each other,and how they can provide significant benefits to DSOs in enabling them to successfully manage evolving distribution networks with high penetration of DERs when they are integrated together into the control centers of distribution utilities.

关键词： Distributed generation distributed energy resource(DER) aggregator distributed energy resource management system(DERMS) non-wire alternatives.

Short-circuit Analysis in Large-scale Distribution Systems With High Penetration of Distributed Generators

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IEEE/CAA Journal of Automatica Sinica 2017年第2期4卷 243-251页

作者： luka V.Strezoski Marija D.Prica IEEE Case School of Engineering Case Western Reserve University

In this paper a short-circuit computation(SCC) procedure for large-scale distribution systems with high penetration of distributed generators based on contemporary technologies is proposed. The procedure is suitable for real-time *** of modern distributed generators differs from the modeling of traditional synchronous and induction ***, SCC procedures found on the presumption of distribution systems with only traditional generators are not suitable in nowadays systems. In the work presented in this paper, for computation of the state of the system with short-circuit, the improved backward/forward sweep(IBFS) procedure is *** results show that the IBFS procedure is much more robust than previous SCC procedures, as it takes into account all distribution system elements, including modern distributed generators.

关键词： Distributed generation(DG) distribution system distribution management system(DMS) short-circuit computation