501 research outputs found
Serbian Identity and the Concept of Europeanness
No full textSerbia is considered as "an unfinished state" with a rather "undefined nation and as such approaching the European Union. This raises the question to what extent these circumstances will influence the success of Serbias EU-integration process, since nation identity and statehood are in this article seen as constitutional parts of the concept of Europeanness. Thus this paper focuses on Europeanness and the identity behind it. It further gives an overview of the Serbian identity, first by presenting its dichotomy and then by highlighting the main factors, which have primarily shaped the identity of Serbia. Finally this paper shows why a clearly defined national identity would facilitate Serbias access to the EU.Identity, Europeanness, Nation state, Serbian identity
Antioxidative defense and life history traits of four larval instars of Lymantria dispar L. in static magnetic field
No full textMagnetic fields are all around us: in the Universe, on the Earth, among and within organisms, cells, molecules, and single atoms. Fast technological development and modernization of life, increase the level of artificial magnetic fields, thus affecting every living beings. Hence, exposure of organisms to omnipresent magnetic field could represent important stressogenic factor for them. Magnetic sensitivity is very well documented in insects, but there is little research of the effects of magnetic fields on antioxidative defense during their development. The main purpose of this work was to evaluate the effects of static magnetic field (SMF, 230 mT) on antioxidative defense, as well as life history traits of larval instars (from 1st to 4th) of Lymantria dispar L. (Lepidoptera). The activity of superoxide dismutase (SOD), catalase (CAT), glutathione reductase (GR), and glutathione-S transferase (GST) in each larval instar was measured spectrophotometrically. Life history traits (mortality, larval mass and development duration) were monitored daily. Magnetic field increased the activity of SOD, CAT, GR, and GST in all larval instars, but these changes were significant only in older larval instars (3rd and 4th), except CAT. During the larval development, mortality was higher in SMF group than the control. Also, we observed a significant increase in mass of 4th larval instar in magnetic field compared to the control. On the other hand, we did not detect a significant influence of SMF on duration of larval instars. The obtained results demonstrate differences in MF susceptibility of younger and older larval instars of L. dispar. In conclusion, the applied magnetic field could be considered as a potential stressor influencing life history traits, as well as examined antioxidative biomarkers.Goran S. Ristić, editor. Book of abstracts:10th Jubilee International Conference on Radiation in Various Fields of Research: RAD 2022; 2022 Jul 25-29; Herceg Novi, Montenegro. Niš: RAD Centre; 2022. p. 2
A phenomenological analysis of sintering kinetics from the viewpoint of activated volume
No full textThe sintering kinetics of real systems has been viewed as a process of transport of activated volume. Activated volume is a parameter that can be used to describe mass transport during the sintering process. It defines the movement of point defects and dislocations during the sintering process. A phenomenological equation has been defined using this parameter, which can be applied to analyze kinetics of the sintering process. It has been applied to analyze the sintering process of several disperse systems. Values obtained for parameters of the equation have also been analyzed
Sex-specific antioxidative strategy and fitness components of Lymantria dispar L. in static magnetic field
No full textLife on Earth exists under the influence of natural magnetic field (geomagnetic field – 25 to 65 μT). Nowadays, this is not the only magnetic field (MF) whose effects we find and endure in nature. Human activities (electrification, industrial and technological development) are sources of several strong artificial MFs. These MFs have a stressful impact on the life processes in the organisms and should be treated as a kind of environmental pollutant that deserves constantly growing attention. Insects are sensitive to Mfs, showing considerable changes in development, neuroendocrine system, genome, metabolism, antioxidative defence, daily activities, orientation, behavior etc. Static magnetic field (SMF) extensively changes free radical production, increases peroxidation processes of lipid bilayers of cell membranes and expresses a negative influence on insect tissues. Prooxidative stressogenic effect of SMF on insect tissues includes modification of activity of antioxidative enzymes and production of non-enzymatic antioxidants.
The aim of our research was to evaluate differences in fitness components (survival rate, larval mass, development duration) and antioxidative defence strategy (activity of superoxide dismutase - SOD, catalase - CAT, glutathion S-transferase - GST and whole amount of glutathione - GSH) of male and female Gypsy Moth (Lymantria dispar Linnaeus, 1758) larvae, after the long-term exposure to SMF (230mT).
Newly hatched male and female larvae of L. dispar were exposed to a magnetic field of approximately 230 mT generated by a static double U-shaped magnet (Raytheon, model 6002). It consists of two symmetric halves. Magnetic field has relatively homogenous strength and field was measured by a gausmeter (HIRST – GAUSSMETER GM 05, with probe PT 2837 – Hirst Magnetic Instruments LTD, Tesla House, Tregoniggie, Cornwell, UK). Determination of the differences in activities of antioxidative enzymes and the amount of GSH was done in whole larvae homogenates. SOD was conducted according to the methods described by Mistra & Fridovich (1972). CAT activity was determined according to the method by Beutler (1982). GR activity was measured according to Glatzle et al. (1974). GST (antioxidative function) activity was determined according to the method by Habig et al. (1974). Determination of the concentrations of reduced GSH was conducted according to Griffith (1980). We also evaluated fitness components daily.
The study provides information on the effects of the long-term exposure of male and female L. dispar larvae to the SMF. Such exposure induces significant alterations in their strategy of antioxidative defence that are strikingly sex-specific. Increasing the knowledge of effects of SMF exposure in evolutionary simpler organisms may be the basis for understanding its action in higher organisms and humans.Goran S. Ristić, editor. Book of abstracts:10th Jubilee International Conference on Radiation in Various Fields of Research: RAD 2022; 2022 Jul 25-29; Herceg Novi, Montenegro. Niš: RAD Centre; 2022. p. 3
Constituting Neoclassicism in Serbia or: How and Why Neoclassicism Can Be Understood as Modernism – a Study of Ristić’s Second Symphony
No full textThe paper examines the possible re-contextualization of the Serbian musical neoclassicism in the field of (sober) modernism/socialist aestheticism characteristic for Serbian art and literature of the fifties. From that perspective, the Second Symphony (1951) by Milan Ristić is seen as the constitutive piece of neoclassicism/sober modernism, i.e. of artistic tendency that is going to become very important for understanding Serbian music in the second half of the 20th century
Kompetencija učiti kako učiti: teorijske osnove i istraživanja u hrvatskom kontekstu
No full textIN CROATIAN: Knjiga objedinjuje suvremene teorijske spoznaje o upravljanju procesom učenja, ali i empirijska istraživanja vezana uz različite aspekte učenja koja su posljednjih godina provedena u Institutu za društvena istraživanja u Zagrebu. Te su teorijske i empirijske spoznaje poslužile kao osnova za izradu prijedloga kurikuluma međupredmetne teme Učiti kako učiti, izrađenog u sklopu Cjelovite kurikularne reforme 2015./2016. godine. Knjiga sadrži ukupno deset poglavlja. U prvom poglavlju teorijskog dijela knjige Iris Marušić predstavlja razvoj kompetencije učiti kako učiti u međunarodnom kontekstu, s posebnim osvrtom na globalne i europske inicijative obrazovne politike koje definiraju i teorijski razrađuju sastavnice te kompetencije. U drugom poglavlju teorijskog dijela Josip Šabić daje pregled domaćih istraživanja pojedinih sastavnica kompetencije učiti kako učiti. Završni dio istog poglavlja posvećen je konceptualizaciji i elaboraciji prijedloga kurikuluma međupredmetne teme učiti kako učiti, jednog od prvih kurikulumskih dokumenata u svijetu u čijem je fokusu razvoj te kompetencije u formalnom sustavu odgoja i obrazovanja. Idućih nekoliko poglavlja posvećeno je osnovnim teorijskim postavkama samoregulacije učenja i njezinim ključnim sastavnicama, poput strategija učenja i metakognicije te samoregulacije emocija i motivacije u učenju. U trećem poglavlju knjige Nina Pavlin-Bernardić i Vlasta Vizek Vidović opisuju osnovne postavke i zajedničke pretpostavke najvažnijih modela samoreguliranog učenja. Sljedeće poglavlje autorica Nine Pavlin-Bernardić i Vesne Vlahović-Štetić donosi pregled strategija učenja i praćenja nastave kao kognitivnih aspekata samoregulacije učenja, uz vrlo korisne preporuke nastavnicima vezane uz poticanje razvoja strategija učenja kod učenika. U petom poglavlju knjige Zrinka Ristić Dedić bavi se metakognitivnim aspektima samoregulacije učenja, s posebnim naglaskom na ulogu metakognitivnih znanja, vještina i doživljaja u praćenju, kontroli i regulaciji učenja te ostvarivanju obrazovnih rezultata i na mogućnost razvoja u školskom kontekstu. U šestom poglavlju Vlasta Vizek Vidović detaljno razrađuje samoregulaciju motivacije i emocija u učenju nudeći pregled relevantnih konstrukata i modela u tim područjima, ali i smjernice za poticanje razvoja samoregulacije učeničke motivacije i emocija u školskoj praksi. Sedmo poglavlje autorice Zrinke Ristić Dedić predstavlja različite pristupe mjerenju samoregulacije učenja i glavne izazove s kojima se istraživači susreću pri ispitivanju i procjenjivanju određenih sastavnica samoreguliranog učenja. Iduća tri poglavlja knjige predstavljaju izbor tema i nalaza istraživanja vezanih uz kompetenciju učiti kako učiti koji su plod istraživačkih interesa skupine istraživača u Centru za istraživanje i razvoj obrazovanja Instituta za društvena istraživanja u Zagrebu. Taj dio započinje poglavljem autorice Ivane Jugović u kojem prikazuje teorijske zasade i empirijske nalaze o rodnim aspektima motivacije za učenje hrvatskih srednjoškolaca. Knjiga se nastavlja poglavljem o vezama ličnosti i strategija učenja učenika završnog razreda osnovne škole, u kojem autorica Iris Marušić prikazuje nalaze dobivene u nas iz perspektive dosadašnjih empirijskih spoznaja o ulozi ličnosti u obrazovanju. U završnome, desetom poglavlju Boris Jokić i Zrinka Ristić Dedić prikazuju neke od rezultata velikoga empirijskog istraživanja o razvijenosti kompetencije učiti kako učiti učenika osnovnih škola. U poglavlju su prikazani rezultati o učeničkoj percepciji instrumentalne vrijednosti obrazovanja i učenja za ostvarenje dugoročnih pozitivnih životnih ishoda te o njihovoj percepciji Republike Hrvatske kao pogodnog okružja za učenje i obrazovanje. --------------- IN ENGLISH: The book includes theoretical knowledge on the regulation of the learning process and empirical research regarding various learning aspects, conducted at the Institute for Social Research in Zagreb during the past few years. These theoretical and empirical insights served as a basis for the development of the proposal for the curriculum of the cross-curricular topic Learning to learn, developed within the Comprehensive Curricular Reform 2015/2016. The book consists of ten chapters. In the first chapter of the theoretical part Iris Marušić presents the development of the learning to learn competence in the international context, with a special view on the global and European educational policy initiatives that define and theoretically elaborate the components of this competence. In the second chapter of the theoretical part Josip Šabić gives a review of research into particular components of the learning to learn competence in Croatia. The concluding part of the same chapter is dedicated to the conceptualization and elaboration of the proposal for the curriculum of the cross-curricular topic learning to learn, being one of the first curricular documents in the world that is focused on the development of this competence in formal education. The succeeding chapters are devoted to the basic theoretical concepts of self-regulation of learning and its key components, such as learning strategies and metacognition, self-regulation of emotions and motivation in learning. In the third chapter Nina Pavlin-Bernardić and Vlasta Vizek Vidović outline the basic concepts and common assumptions of the most significant models of self-regulated learning. The next chapter by the authors Nina Pavlin-Bernardić and Vesna Vlahović-Štetić brings a review of learning strategies and modes of class participation as cognitive aspects of self-regulation of learning, along with very useful recommendations for teachers, aimed at encouraging the development of learning strategies among pupils. In the fifth chapter Zrinka Ristić Dedić analyses metacognitive aspects in self-regulation of learning, with a special focus on the role of metacognitive knowledge, skills and experiences in monitoring, control and regulation of learning and achieving educational results, and the possibility of development in the school context. In the sixth chapter Vlasta Vizek Vidović elaborates in detail the self-regulation of motivation and emotions in learning, offering a review of relevant constructs and models in these research areas, and the guidelines for fostering the development of self-regulation of pupils' motivation and emotions in school practice. The seventh chapter by the author Zrinka Ristić Dedić brings various approaches to measuring self-regulation of learning and the main challenges that researchers are facing when examining and assessing particular components of self-regulated learning. The following three chapters present a selection of topics and research findings related to the learning to learn competence that emerged as a result of the research interests of a group of scholars from the Centre for Educational Research and Development of the Institute for Social Research in Zagreb. This part begins with a chapter by Ivana Jugović, in which theoretical concepts and empirical findings on gender-related aspects of motivation for learning among Croatian secondary school pupils are presented. The book continues with a chapter on the relations between personality traits and learning strategies of 8th grade elementary school pupils in Croatia, where the author Iris Marušić presents findings from the perspective of to-date empirical knowledge on the role of personality in education. In the final chapter Boris Jokić and Zrinka Ristić Dedić present some of the results of a large empirical research on the development of the learning to learn competence among elementary school pupils. The chapter brings the results on pupils' perception of instrumental value of education and learning for achieving long-term positive life outcomes, and their perception of the Republic of Croatia as a suitable environment for education and learning
Sajmište Camp (Semlin Judenlager)
No full text"Priručnik za učenje o Holokaustu" je autorsko delo 19 profesora iz Srbije koji su 2008. godine pohađali međunarodnu školu učenja o Holokaustu u Jad Vašemu u Jerusalimu. Sastavljanjem ovakvog praktikuma želeli su da podele sa svojim kolegama u Srbiji ono što su naučili tokom studijske posete ovoj instituciji. Obrađeni su različiti pedagoško-metodički problemi sa kojima se suočavaju profesori koji mladoj generaciji treba da objasne šta je Holokaust."Priručnik za učenje o Holokaustu" (Holocaust Learning Handbook) is a work of 19 professors from Serbia who attended the International Holocaust Learning School in Yad Vashem in Jerusalem in 2008. By creating such a practicum, they wanted to share with their colleagues in Serbia what they learned during their study visit to that institution. Various pedagogical and methodological problems that professors who need to explain to the young generation about the Holocaust are addressed
Proffesions of Jews between the two world wars
No full text"Priručnik za učenje o Holokaustu" je autorsko delo 19 profesora iz Srbije koji su 2008. godine pohađali međunarodnu školu učenja o Holokaustu u Jad Vašemu u Jerusalimu. Sastavljanjem ovakvog praktikuma želeli su da podele sa svojim kolegama u Srbiji ono što su naučili tokom studijske posete ovoj instituciji. Obrađeni su različiti pedagoško-metodički problemi sa kojima se suočavaju profesori koji mladoj generaciji treba da objasne šta je Holokaust."Priručnik za učenje o Holokaustu" (Holocaust Learning Handbook) is a work of 19 professors from Serbia who attended the International Holocaust Learning School in Yad Vashem in Jerusalem in 2008. By creating such a practicum, they wanted to share with their colleagues in Serbia what they learned during their study visit to that institution. Various pedagogical and methodological problems that professors who need to explain to the young generation about the Holocaust are addressed
Analysis of isothermal sintering of zinc-titanate doped with MgO
No full textThe aim of this work was analysis of isothermal sintering of zinc titanate ceramics doped with MgO obtained by mechanical activation. Mixtures of ZnO, TiO2 and MgO (0, 1.25 and 2.5%) were mechanically activated 15 minutes in a planetary ball mill. The powders obtained were pressed under different pressures and the results were fitted with a phenomenological compacting equation. Isothermal sintering was performed in air for 120 minutes at four different temperatures. Structural characterization of ZnO-TiO2-MgO system after milling was performed at room temperature using XRPD measurements. DTA measurements showed different activation energies for pure and doped ZnO-TiO2 systems. Thus addition of MgO stabilizes the crystal structure of zinc titanate
Investigation of zinc stannate synthesis using photoacoustic spectroscopy
No full textMixtures of ZnO and SnO2 powders, with molar ratio of 2:1, were mechanically activated for 40, 80 and 160 minutes in a planetary ball mill. The resulting powders were compacted into pellets and non-isothermally sintered up to 1200°C with a heating rate of 5°C/min. X-ray diffraction analysis of obtained powders and sintered samples was performed in order to investigate changes of the phase composition. The microstructure of sintered samples was examined by scanning electron microscopy. The photoacoustic phase and amplitude spectra of sintered samples were measured as a function of the laser beam modulating frequency using a transmission detection configuration. Fitting of experimental data enabled determination of photoacoustic properties including thermal diffusivity. Based on the results obtained a correlation between thermal diffusivity and experimental conditions as well the samples microstructure characteristics was discussed.
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