University of Niš: Facta Universitatis (E-Journals) / Универзитет у Нишу
Not a member yet
4905 research outputs found
Sort by
CRISCROSS OPTIMIZATION (CCO)-BASED OPTIMAL DISPATCH STARTEGY FOR INTEGRATED HYDRO-THERMAL-WIND SCHEDULING
Get PDFIncorporating renewable energy resources (RER) into standard power flow schedules is a complex optimization issue with multiple objectives and nonlinear characteristics. This matter necessitates the careful assessment of a multitude of economic and environmental concerns. This matter requires the evaluation of many restrictions related to disparities between races. The primary goal of generation scheduling is to minimize pollution emissions and costs over a limited time frame. This must be accomplished while ensuring that all system restrictions are adhered to. The Crisscross optimization (CCO) algorithm is used in this research to provide a novel method for solving the short-term hydro-thermal power scheduling (ST-HTPS) and short-term hydro-thermal-wind power scheduling (ST-HTWPS) issues. The suggested CCO method is compared to previously implemented particle swarm optimization (PSO) algorithms, moth-flame optimization (MFO) algorithms, and genetic algorithms (GA). This strategy makes convergence happen faster and solutions more precise while retaining a balance between exploration and exploitation. The proposed model takes into account real-time operational limitations, such as water balance equations, ramp rate limits, and wind uncertainty, to make sure that scheduling is both practical and effective. The suggested systems serve as study examples to evaluate the actual enhancement of the proposed CCO compared to PSO, MFO, PSO, and GA. The simulation outcomes indicate that the recommended CCO modeling offers a more advantageous option than previous heuristic techniques regarding financial considerations (36389.25 $/day) and reduced emissions (9436.29 lb/day). Despite considering the inclusion of several intricate constraints related to ST-HTWPS scenarios, these findings remain unaltered
VIRUS POGODIO VOL STRIT: METAFORIČKI PRIKAZ EKONOMSKIH POSLEDICA PANDEMIJE KOVIDA-19 U KARIKATURAMA
No full textThe COVID-19 pandemic had an immediate and profound impact on economies worldwide, rapidly emerging as a central focus of both news media and editorial cartoonists. Adopting a cognitivist approach to multimodality (Forceville 2020, 2024; Forceville and van de Laar 2019; Silaški and Đurović 2019; Zhang and Forceville 2020), this paper examines the metaphorical representation of pandemic-related financial instability in the genre of editorial cartoons. The dataset, compiled from several online sources, comprises 80 cartoons published globally in 2020 and 2021. The analysis focuses on cartoons that metaphorically depict two key financial concepts – stock market and people’s savings – both of which played a critical role in shaping broader market stability and individual financial security during the pandemic. The study demonstrates how their pictorial and multimodal metaphorical representations facilitate meaning-making of the pandemic’s disruptive economic effects while simultaneously conveying powerful emotional and evaluative messages. It also highlights the pivotal role of metonymy in representing the pandemic’s economic consequences and shaping overall meaning. Finally, the paper contributes to existing research on multimodal metaphor and metonymy in editorial cartoons, illuminating their capacity to reconstruct socio-economic realities in the context of a global public health crisis. U okviru teorije multimodalnosti iz kognitivističke perspektive (Forceville 2020, 2024; Forceville i van de Laar 2019; Silaški i Đurović 2019; Zhang i Forceville 2020; itd.), ovaj rad se bavi metaforičkim prikazom ekonomskih posledica pandemije kovid-19 u žanru političke karikature. Korpus za analizu prikupljen je iz više digitalnih izvora (npr. cartoonmovement.com, caglecartoons.com, chinadaily.com.cn, cartoonstock.com) i obuhvata 80 karikatura objavljenih širom sveta tokom 2020. i 2021. godine. U radu se posebno bavimo onim karikaturama koje metaforički prikazuju dva ključna finansijska fenomena – berzu i ličnu štednju – koji su imali presudan uticaj na finansijsku stabilnost tokom pandemije. Cilj je da se ukaže na načine na koje slikovni i/ili multimodalni metaforički prikazi dva navedena fenomena doprinose razumevanju složenih negativnih efekata pandemije po finansijsku situaciju institucija i pojedinaca, istovremeno prenoseći snažan afektivni i evaluativni naboj. Takođe, ističe se ključna uloga metonimije u predstavljanju ekonomskih posledica pandemije i u celokupnom procesu kreiranja značenja. Rad teži da doprinese postojećim istraživanjima multimodalne metafore i metonimije u političkim karikaturama, kao i njihovoj ulozi u rekonstruisanju društveno-ekonomske stvarnosti u kontekstu zdravstvene krize
ADDITIVELY TRANSTABLE CONIC SECTIONS WITH RESPECT TO FIXED COEFFICIENTS
Get PDFThe arithmetic mean has several important properties. One of them preserves the result of the arithmetic mean. That is, if one value increases and another decreases, the result of the arithmetic mean is the same. This property is called transfer stability, transtability for short. We can see its reach in several mathematical theories. The most common use is with aggregation functions. This article aims to show another use of this property, specifically in the geometry of conic sections. We have outlined how the transtability of a conic section works. The main idea was to find a common property for conic sections connected by transtability. We found that these conics have the same common intersection and the set of all centers forms a conic
ROUGH CONVERGENCE OF DOUBLE SEQUENCES IN 2-NORMED SPACES
Get PDFIn this work, we introduced the notions of rough convergence of double sequence, rough Cauchy double sequence and the set of rough limit points () of a double sequence and obtained rough convergence criteria associated with this set in -normed space. Later, we investigated the linearity properties of and proved that is closed and convex. Finally, we examined the relations between rough convergence and rough Cauchy double sequence in -normed space
KADA SE VODA I VATRA STAVE U SLUŽBU UMETNOSTI: POTOP ANRIJA BOŠOA
No full textPoète, dramaturge et romancier belge francophone, Henry Bauchau publie en 2010 un récit intense et délicat dont le titre, Déluge, renvoie à la création d’une toile monumentale représentant la catastrophe divine par un peintre marginal. Tous les personnages de l’intrigue vont évoluer au gré de la réalisation de cette œuvre fédérative et salvatrice.L’intertextualité biblique (mais aussi mythologique) est mise au service d’une réflexion sur l’art et du cheminement intérieur des protagonistes. Le déluge ne fait plus référence à un phénomène naturel mais à une introspection profonde. La narration développe un itinéraire subtil de la perception d’une rencontre improbable à l’émotion artistique et l’action créative. Florian, le peintre pyromane qui brûle habituellement ses dessins et ses tableaux, parviendra-t-il, cette fois-ci, à préserver sa dernière œuvre, diluvienne comme son sujet et fourmillante de couleurs, dans laquelle l’eau et le feu présentent la même ambivalence ?Œuvre de la maturité (parue quelques mois avant la disparition de son auteur) et écrite dans une langue sobre et élégante, Déluge d’Henry Bauchau témoigne de la dimension cathartique qu’offre la création à plusieurs mains et embarque son lecteur dans une arche à la silhouette très contemporaine.Pesnik, dramaturg i belgijski frankofoni romanopisac, Anri Bošo, objavio je 2010. godine delikatnu pripovetku čiji se naslov, Potop, odnosi na stvaranje monumentalne slike koja predstavlja božansku katastrofu, koju je naslikao ne tako poznati slikar. Svi likovi u fabuli razvijaju se u skladu sa ostvarenjem ovog projekta: koji ujedinjuje i donosi spasenje.Biblijska intertekstualnost (kao i mitološka) stavljena je u službu razmatranja umetnosti i unutrašnjeih puteva protagonista. Potop više ne predstavlja prirodni fenomen, već duboku introspekciju. Naracija razvija suptilni put od percepcije nepredvidivog susreta do umetničke emotivnosti i kreativne akcije. Da li će Florijan, piroman koji obično spaljuje svoje crteže i slike, uspeti ovoga puta da sačuva svoje poslednje delo, koje je preplavljeno kao i njegova tema i prepuno boja, u kojem voda i vatra predstavljaju istu ambivalentnost?Delo zrelosti (objavljeno nekoliko meseci pre smrti autora) i napisano suzdržanim i elegantnim jezikom, Potop Anrija Bošoa svedoči o katarktičnoj dimenziji udruženog rada i vodi čitaoca u barku sa veoma savremenim obrisima
FRAMING FENOMEN UNUTAR DISKURSA KORPORATIVNOG OKRUŽENJA
No full textLa communication des entreprises sur leur site Internet est une occasion idéale de se « mettre en scène ». Les organisations sont ainsi libres de présenter l’information à leur avantage, et, ce faisant, de tenter de diriger l’interprétation de leur public selon un procédé de framing. Sur la base de deux de ces formes de framing issues de la typologie de MacLachlan et Reid (1994), nous démontrons l’existence, dans deux corpus distincts, d’une corrélation statistique significative entre organisation spécifique de l’information dans le déroulé de la phrase, et recours aux figements thématiques du discours environnemental. Način na koji kompanije komuniciraju na veb stranicama pruža idealnu priliku da se time „predstave“. Organizacije stoga imaju slobodu da predstave informacije sebi u korist, čineći to, one skreću interpretaciju svoje publike kroz framing proces. Zasnivajući se na dve framing forme proizvedene iz tipologije MacLachlan i Reid (1994), mi ovim putem pokazujemo postojanje statistički bitnih korelacija, u dva različita korpusa, između specifičnih organizacija informacija u strukturi rečenica i korišćenje rekurentnih, tematsko-ekoloških izraza
TEŽINSKE KATEGORIJE U DŽUDOU: DA LI SU RAZLIKE SAMO FIZIČKE?
No full textThis study explores the relationship between weight categories and personality traits among male judokas, focusing on psychological differences alongside well-documented physical and performance-related attributes. The aim was to compare emotional competence, personality traits and perceived self-efficacy across lightweight, middleweight, and heavyweight judo categories. The sample included 28 male judokas with over seven years of training and national competitive success, divided into lighter (n=15; -60kg, -66kg, -73kg and 81kg) and heavier (n=13; -90kg, -100kg and +100kg) categories. Psychological traits were assessed using the Emotional Competence Questionnaire, HEXACO-PI-R, PANAS, and the Perceived Social Self-Efficacy Scale. Statistical analyses included independent samples t-tests, Pearson correlations, and canonical discriminant analysis. The findings revealed significant differences in emotionality, with lightweight and middleweight judokas exhibiting higher levels compared to heavyweights. Heavier judokas displayed lower emotional expressiveness and a lower ability of managing emotions, along with reduced negative affect. In contrast, lighter judokas demonstrated higher openness to experience, conscientiousness, and cooperativeness. Additionally, conscientiousness correlated positively with age. These results highlight the need for tailored coaching approaches to address the distinct psychological profiles of judokas in different weight categories. While heavyweight judokas may require support to identify and manage latent psychological needs, lightweight athletes could benefit from enhanced emotional support.Ovo istraživanje bavi se odnosom između težinskih kategorija i osobina ličnosti kod muških džudista, s fokusom na psihološke razlike pored dobro dokumentovanih fizičkih i performansnih karakteristika. Cilj je bio da se uporede emocionalna kompetencija, osobine ličnosti i percipirana samoefikasnost u lakoj, srednjoj i teškoj težinskoj kategoriji džuda. Uzorak je uključivao 28 muških džudista sa preko sedam godina treninga i nacionalnim takmičarskim uspehom, podeljenih u lakše (n=15; -60kg, -66kg, -73kg i -81kg) i teže (n=13; -90kg, -100kg i +100kg) kategorije. Psihološke karakteristike su procenjivane pomoću Upitnika emocionalne kompetencije, HEXACO-PI-R, PANAS-a i Skale percipirane socijalne samoefikasnosti. Statističke analize su obuhvatile t-testove za nezavisne uzorke, Pirsonove korelacije i kanoničku diskriminantnu analizu. Rezultati su otkrili značajne razlike u emocionalnosti: džudisti iz lakih i srednjih kategorija pokazali su viši nivo u poređenju sa teškašima. Teži džudisti pokazali su nižu emocionalnu izražajnost i slabije sposobnosti u upravljanju emocijama, uz smanjeni negativni afekt. Nasuprot tome, lakši džudisti iskazali su veću otvorenost za nova iskustva, savesnost i kooperativnost. Pored toga, savesnost je pozitivno korelisala sa godinama. Ovi rezultati naglašavaju potrebu za prilagođenim pristupima treniranju kako bi se u fokusu našli različiti psihološki profili džudista u različitim težinskim kategorijama. Dok teži džudisti mogu zahtevati podršku za identifikaciju i upravljanje latentnim psihološkim potrebama, lakši sportisti bi mogli imati koristi od pojačane emocionalne podrške
APPLICATION OF ULTRASOUND FOR DIFFERENT PURPOSES WITH EXAMPLES
Get PDFIn the last decade application of ultrasound has been increasing. The reason for this is that a wide range of frequencies can be utilized for various purposes. Different scientific fields describe ultrasound in their own way, and from an engineering point of view, the use of ultrasound is quite interesting. The purpose of this paper is to provide an overview of how ultrasound can be applied in diagnostics and welding, including practical examples. Also, during this research dependency between the measured echo of ultrasound wave and depth of founded irregularity is given
ZASTUPLJENOST DIDAKTIČKIH MUZIČKIH IGARA U NASTAVNIM PROGRAMIMA I UDŽBENICIMA MUZIČKE KULTURE U RAZREDNOJ NASTAVI
No full textThe representation of didactic musical games in current classroom teaching curricula and Musical Culture textbooks is the focus of this research. Didactic musical games are activities with specific rules and defined educational goal. Through these games, students unconsciously master various melodic and rhythmic concepts while developing their musical abilities. Due to their educational potential, these games are valuable tools for acquiring knowledge and developing skills in the teaching of Musical Culture. In this regard, the goals and tasks of this research are to determine the extent to which didactic musical games are included in the curricula and Musical Culture textbooks. The results indicate that these games are sufficiently represented in relation to the content of the Musical Culture subject. However, it is necessary to more precisely categorize certain musical games, such as singing games, those with instrumental accompaniment, musical dramatizations and didactic musical games. Additionally, we find it essential to provide specific didactic-methodical instructions for implementing these games in the curricula. Predmet istraživanja ovog rada jeste zastupljenost didaktičkih muzičkih igara u aktuelnim nastavnim programima i udžbenicima muzičke kulture u razrednoj nastavi. Didaktičke muzičke igre su igre sa određenim pravilima i postavljenim ciljem i obrazovnim zadatkom koji treba ostvariti. Kroz ove igre učenici nesvesno savladavaju različite melodijsko-ritmičke pojmove i razvijaju muzičke sposobnosti. Zbog svog obrazovnog potencijala, didaktičke muzičke igre su dragoceno sredstvo za sticanje znanja i razvijanje veština u nastavi muzičke kulture. U vezi sa tim, cilj i zadaci istraživanja u okviru ovog rada su utvrditi u kojoj meri su u nastavnim programima i udžbenicima muzičke kulture zastupljene didaktičke muzičke igre. Rezultati istraživanja ukazuju da su ove igre zastupljene u dovoljnom broju u nastavnim programima i udžbenicima u odnosu na sadržaje nastavnog predmeta Muzička kultura. Ipak, neophodno je da se preciznije definiše kojoj kategoriji pripadaju određene muzičke igre: igre sa pevanjem, igre uz instrumentalnu pratnju, muzičke dramatizacije ili didaktičke muzičke igre. Uz to, smatramo potrebnim da se u nastavnim programima daju konkretna didaktičko-metodička uputstva za realizaciju i ovih igara
GEOMETRICALLY NONLINEAR ANALYSIS OF PIEZOELECTRIC ACTIVE LAMINATED SHELLS BY MEANS OF ISOGEOMETRIC FE FORMULATION
Get PDFThe topic of piezoelectric active thin-walled structures has attracted a great deal of attention over the previous couple of decades. Lightweight structures with piezoelectric material based active elements, sensors and actuators, offer numerous advantages over their passive counterparts. This explains the motivation of authors to dedicate their work to this enticing research field. Accurate and reliable numerical tools for modeling and simulation of this type of structures is still a hot topic in the research community. This paper offers an isogeometric finite element formulation for shell type of structures made of composite laminates including piezoelectric layers characterized by the electro-mechanical coupling. The shell kinematics is based on the Mindlin-Reissner assumptions, thus including the transverse shear effects. A few examples selected from the available literature are considered to demonstrate the applicability of the developed numerical tool and assess its performance