INTERKULTURALNI DIJALOG U OBRAZOVANJU - KRITIČKA REFLEKSIJA U MUZEJSKOM KONTEKSTU

The paper underlies the importance of the museum and international scientific partnership to promote and add value to the regional cultural heritage, as a condition for developing greater awareness of the civilisational framework of cultural inheritance at the global level. The goal of the action research carried out in parallel in Italy and Serbia and involving 170 children was to devise, realise and evaluate and educational programme that would bring museums closer to children. Reflexivity and triangulation were used in this research endeavour based on a constructivist theoretical framework. Reflecting on the activities carried out and the data collected, the authors of this paper, as participants in the research, are able to validate several important roles of the museum as a place that facilitates the development of an awareness of the cultural heritage of one’s own country, skills and capabilities, the social and individual construction of meaning, as well as the development of international partnership. The research findings confirm that the field of qualitative educational discourse offers museums a respectable future in terms of linking theory and practice. In other words, museums will make it possible for scientific results to be more closely applied for the purpose of improving educationa lpractice.U tekstu se objašnjava značaj muzeja i međunarodnog znanstvenog partnerstva u promociji i valorizaciji regionalnog kulturnog nasljeđa, kao preduvjetu razvijanja svijesti o civilizacijskom okviru kulturnih tekovina na globalnom nivou. S ciljem osmišljavanja, realizacije i evaluacije edukativnog programa radi približavanja djece muzejima, paralelno je u Italiji i Srbiji provedeno akcijsko istraživanje kojim je bilo obuhvaćeno 170 djece. Istraživački projekt, utemeljen u konstruktivistički teorijski okvir, odlikuje refleksivnost i triangulacija. Refleksije provedenih aktivnosti i prikupljenih podataka omogućuju autoricama teksta da, kao sudionice istraživanja, vrednuju važnu ulogu muzeja kao mjesta razvijanja svijesti o kulturnoj baštini vlastite teritorije, vještina i sposobnosti, socijalne i personalne konstrukcije značenja, te oblikovanja međunarodnog partnerstva. Istraživački nalazi potvrđuju da polje kvalitativnog obrazovnog diskursa, muzejima nudi respektabilnu perspektivu u pogledu povezivanja teorije i prakse, odnosno mogućnosti neposrednije primjene znanstvenih rezultata u funkciji unapređivanja obrazovne prakse

Thermodinamic modelling of Pb/Ag Jarosite sulfidation for valuable metals recovery

In this paper thermodynamic modeling of sulfidation of non-standard Pb/Ag - Jarosite is shown, in order to propose optimal technological process for valuable metals recovery. Given the current state of natural resources, demand and consumption, sustainable production of critical metals, especially technological metals, is focus of this research. Neutral leaching residue, Pb/Ag - Jarosite, as a primary zinc production by-product is usually disposed at landfills, despite the fact that contains recyclable base (Zn, Pb, Cu), precious (Ag) and technological, critical metals (In, Ge, Ga). Thermodynamic data for detailed sulfidation behavior of technological metals contained in Pb/Ag - Jarosite were calculated using HSC Chemistry Software v. 9.0 in order to recommend optimal recycling process conditions. The main objectives were determination of temperature effect, input material/sulfidation agent ratio and modeling of phase stability diagrams of chosen technological metal sulfides. Synergetic metallurgy activities including utilization of primary and secondary raw materials can be result of this process modeling

Melanomakrofagni centri i oboljenja morske mačke bljedice, Scyliorhinus canicula (L.), iz južnog Jadrana – značaj za budući monitoring

Melanomacrophages of fish are commonly explored as biomarkers of water pollution and are considered to be sensitive albeit non-specific health indicators in water ecosystems. Sharks as long living marine species are good sentinel species. This study presents morphometric data for splenic and hepatic melanomacrophages (MMC), and observed histopathology in ten lesser-spotted catsharks, Scyliorhinus canicula (L.), one of the most abundant shark species in the eastern Adriatic Sea. At necropsy, we collected random tissue samples from liver, brain, gallblader, pancreas, spleen, kidney, gills, entire digestive system, thyroid gland, rectal gland, entire urogenital (male samples) and genital system (female samples). Collected tissue samples were routinely processed and stained with hematoxylin-eosin, Periodic Acid-Schiff, and Masson Trichrome for microscopic examinations and morphometry. There was a minimal number of histopathological lesions in the examined sharks, but morphometric values reported herein were three folds higher than in previous studies in free-ranging sharks. Studies on larger numbers of sharks are needed to elucidate the biological significance of our finding in the context of population decline of the lesser-spotted catshark.Melanomakrofagni centri različitih taksa ribolikih životinja nerijetko se koriste kao biomarkeri u ekološkim studijama, te se smatraju pouzdanim pokazateljima stanja u ispitivanju onečišćenja. Mor-ski psi, kao objektivno dugoživuće marinske vrste, predstavljaju idealne modele za ovakve studije. U ovom radu autori su prezentirali detaljne morfometrijske podatke za melanomakrofagne centre (MMC) opservirane u jetri i slezeni, kao i uočene histopatološke promjene na deset jedinki morske mačke bljedice, Scyliorhinus canicula (L.) - kao jedne od najzastupljenijih prečnousta istočnog Jadranskog mora. Tijekom obdukcije, uzorkovani su svi organi koji si potom rutinski histološki bojeni (hematoksilin-eozin, Periodic Acid-Schiff i Masson’s Trichtome) s ciljem detaljnijih mik-roskopskih opservacija. Uočena morfologija, kao i brojnost, MMC ispitivanih jedinki odgovara lit-eraturnim podacima za druge vrste prečnousta. Međutim, dokumentirane morfometrijske vrijednosti bile su tri puta veće u odnosu na prethodne studije. Prosječni broj MMC po vidnom polju (HPF) i prosječan postotak područja okupiranog od strne MMC u jetri i slezeni nisu pokazali statistički značajnu razliku. Ipak, prosječna površina jednog jetrenog MMC bila je veća u odnosu na one u slezeni (p<0,05). Opisani podaci o MMC značajno doprinose još uvijek dosta ograničenim podacima o distribuciji, morfologiji i morfometrija MMC kod landovine, te možemo reći da predstavljaju polaznu vrijednost za sljedeće studije. Daljnje, multidisciplinarne, studije neophodne su kako bi se ostvario širi uvid u učinke i povezanost MMC s različitim patološkim stanjima i razumijevanje nega-tivnog utjecaja pritisaka koji vladaju u staništu na zdravstveno stanje mačke bljedice, ali i drugih vrsta, u Jadranskom moru

DEFICIÊNCIAS INTELECTUAIS E DE DESENVOLVIMENTO: CONCEITO DE CORPO E MOVIMENTO - UMA ABORDAGEM NEUROPSICOLÓGICA

People with intellectual disabilities often have to cope with movement and body awareness disorders. Special educators’ assess movement and body awareness in order to determine the level and quality of movement performance, body conception, as well as the lateralization of movement and body. Movement and dance therapy are new rehabilitation methods and treatment to aid with these disorders. This article discusses the differences between the concepts of movement, body schema, body image, and body awareness in order to highlight the importance of these concepts in the physical and mental development of the child, and adulthood. The article pays special attention to the impact of the Covid 19 pandemic on movement and body awareness therapy and rehabilitation methods.Pessoas com deficiência intelectual frequentemente precisam lidar com distúrbios de movimento e consciência corporal. Os educadores especiais avaliam o movimento e a consciência corporal para determinar o nível e a qualidade do desempenho do movimento, a concepção corporal, bem como a lateralização do movimento e do corpo. A terapia de movimento e dança são novos métodos de reabilitação e tratamento para ajudar com esses distúrbios. Este artigo discute as diferenças entre os conceitos de movimento, esquema corporal, imagem corporal e consciência corporal, a fim de evidenciar a importância desses conceitos no desenvolvimento físico e mental da criança e na vida adulta. O artigo dá atenção especial ao impacto da pandemia de Covid 19 nos métodos de reabilitação e terapia de consciência corporal e de movimento

Synergistic solid lubricants system based on selected sulfides of technology metals

Technology advances have resulted in a growing demand for the new tribology materials. In development of the properties of tribology materials, improvements can be achieved by combining materials in form of composites. The aim of this work was production of solid lubricants composites based on sulfides of technology metals. Selected solid lubricant powders, tin sulfide (SnxSy) and tungsten disulfide (WS2), were synthesized by pyrometallurgical method in rotary tilting tube furnace (ST-1200RGV). The chemical thermodynamic parameters of the synthesis were determined using HSC Chemistry software modeling package. Characterization of the obtained powders included analysis of chemical composition by optical emission spectroscopy, phase composition identification by X-ray diffraction (XRD) and microstructural examination by the scanning electron microscopy (SEM) and energy-dispersive spectroscopy (EDS). Finally, the tribological properties of the as-synthesized powders in composite mixture were estimated. It has been shown the beneficial synergistic effect due to unique combination of properties between tin sulfides and tungsten sulfide in composite. In addition, advantage of synergistic tribology material (SnxSy/WS2) is simple method of synthesis and environmentally acceptable components of the composite

Jarosite sludge - utilization and valuable metals recovery applying roasting-leaching process

During the conventional roast–leach–electrolysis (RLE) zinc production process, precipitation of the jarosite-type compounds is widely used to remove iron and other metal impurities from the solution. Above mentioned compounds, with the general formula MFe3(SO4)2(OH)6, (M+=NH4, Na, K, Ag, etc.), in addition to iron, contain a high concentration of Pb, Cd, Cr, As, Zn, In, Ga, Ge as metal oxides and/or sulfates [1]. Consequently, jarosite is considered hazardous yet valuable waste [2]. In addition, every year around 6-7 million tonnes of jarosite waste is generated globally [3]. Due to large waste volumes and its chemical characteristics, jarosite requires a lot of storage space and monitoring. Unfortunately, this type of waste is often landfilled causing serious environmental problems and irreversible metal and value losses. Hence, an urgent solution for both managing and utilization/recycling is required, to face needs regarding ecological demands and circular economy goals. In this paper, jarosite sludge, as a specific type of hazardous industrial waste, is used to investigate transformation to the targeted compounds through the comprehensive thermodynamic analysis and experimental roasting process tests. The roasting was conducted to transform iron into insoluble hematite (Fe2O3), valuable metals (Zn, Cu, and In) into water-soluble sulfates, and to keep Pb in the form of water-insoluble anglesite (PbSO4). The solid residue obtained after roasting was used in leaching tests to further evaluate the efficiency of the targeted phase transformations. Theoretical considerations of chemical reactions and phase thermodynamics were performed using the HSC Chemistry v.9.2.3 software [4] to define potential chemical reactions, examine the feasibility of the target transformations, and set the limiting reaction parameters. Further, in the first part of the experimental work, the influence of the roasting process and reaction parameters on the transformation of jarosite sludge phases into target compounds was investigated. This included variations in the reaction time, temperature, and furnace atmosphere influence. The leaching conditions were kept constant (temperature of 25 °C, during 60 min, and solid to liquid ratio of 1/5) to determine the efficiency of phase transformations in the samples obtained by roasting. Changes in the chemical and mineralogical composition and microstructure were analyzed using different analytical methods, including XRD and SEM analysis. According to the obtained results of the roasting process, it was determined that the phase transformation of jarosite sludge compounds into targeted insoluble hematite and water-soluble sulfates occurs at 730 °C, the time required is 60 min in the air (oxidizing) atmosphere of 1-2 [dm3/h]/kg of the input material, which is in accordance with the results of the theoretical indications. Also, it is experimentally confirmed that the introduction of sulfate into the roasting atmosphere leads to the incomplete transformation of jarosite and the formation of the unwanted Fe2(SO4)3. Leaching results of the sample obtained by the abovementioned optimal roasting conditions show that only 4.5% of Fe is leached while the rest remains as solid targeted hematite. Also, more than 75% of In and more than 90% of other targeted metals (Cu and Zn) are leached, indicating the high efficiency of the roasting process. Phase transformation was confirmed by SEM analysis, showing that hexagonal crystals of jarosite, dominating in the starting material, were completely replaced with the globular microstructure of Fe2O3, in the roasted samples. SEM analysis of the leaching residue also confirmed the absence of the water-soluble sulfates and the presence of the anglesite as water-insoluble sulfate. The phase composition of the samples is confirmed by XRD analysis. This research shows that the proposed process enables the recycling of jarosite through metal transformation and further utilization. The obtained products can be used in industry, while the metal ions can be selectively separated from the sulfate solution and returned to the production streams. This approach contributes to the utilization of jarosite, as hazardous waste, in order to obtain valuable metals, and generally reduces the negative environmental impact by decreasing the amount of disposed waste and reducing the need for primary exploitation

Application of Simple Additive Weighting Method for Selection of Appropriate Measures in the Rehabilitation of the Landslide

Changeable climatic conditions, a large amount of precipitation in a short period, as well as the complexity of the terrain structure can affect the occurrence of landslides in many areas. The paper deals with the problem of landslide rehabilitation on the regional road Stolice - Krupanj, which arose as a result of the steep slope, soil water saturation, and traffic loads. The technical measures for rehabilitating landslides that have been analyzed are: concrete retaining wall, gabion retaining wall, and geogrid. Slope stability analyses with applied technical measures were performed in the GEO5 program. All technical measures have increased the stability of the slope. The final decision about the appropriate solution was made after ranking all alternatives and applying the Simple Additive Weighting (SAW) method. This Multi-criteria decision analysis method is used to find the sum of the weighted performance rating for each alternative on all criteria. The criteria used for the analysis are: С1 – Construction costs, С2 – Fitting into the environment, С3 – Lifetime of the object, С4 – Susceptibility to damage. The application of the SAW method also requires determining the weight of the criteria and for this was used Rank sum method. As a result of the application of the multi-criteria decision analysis method, the use of geogrid proved to be the best solution to prevent damage caused by landslides

Stanje zdravstvenog sistema Republike Srbije u periodu 2004-2012. godine

Introduction The backbone of Serbian health system forms the public healthcare provider network with 355 institutions and around 112,000 employees, owned and controlled by the Ministry of Health and financed mainly by the Republican Health Insurance Fund. The law recognizes private practice that was not included, till recently, in the public funding scheme. New Health Insurance Law (2005) decreased the number of entitlements in the basic health service package. It abolished the right to dental health care for adults (exceptions are: children, older than 65, pregnant women and emergency cases) as well as the right to compensate travel expenses. The aim of this study was to evaluate the effects of health care system of the Republic of Serbia and indicate parameters that determine the state of health of the population, on the ground of data obtained by the Institute of Public Health of Serbia. Results In the period 2004-2012, cardiovascular diseases represented the main cause of illness in Serbia (50%). In 2012 digestive system diseases were on the second place. Neoplasm and nervous system diseases were on the third place. From 2007 to 2012 there was slight decline in the birth rate and number of deaths, but the death rate increased from 13.9 to 14.2. Health care system in Serbia is funded through the combination of public finances and private contributions. Primary care is provided in 158 health care centres and health care stations, secondary and tertiary care services are offered in general hospitals, specialized hospitals, clinics, clinico-hospital centers and clinical centres. Conclusion A significant but not satisfactory progress has been achieved in the field of health status indicators as the most important outcome of the final performance of the health system. The transition of public health care system in Serbia since the communist period to present and slow integration with European Union is unfinished process.Uvod Osnovicu zdravstvenog sistema Republike Srbije čini zdravstvena mreža od 355 državnih zdravstvenih ustanova i oko 112.000 zaposlenih koji su pod kontrolom Ministarstva zdravlja, a finansiraju se preko Republičkog fonda zdravstvenog osiguranja. Zakon poznaje i privatni sektor, koji doskora nije bio uključen u shemu javnog finansiranja. Zakon o zdravstvenom osiguranju iz 2005. godine smanjio je prava u osnovnom zakonu zdravstvenih usluga i ukinuo pravo na stomatološku zdravstvenu zaštitu (s izuzetkom dece, osoba starijih od 65 godina, trudnica i hitnih slučajeva), odnosno pravo na naknadu putnih troškova u vezi s ostvarivanjem prava na zdravstvenu zaštitu. Cilj ovog rada je bio da se na osnovu podataka Instituta za javno zdravlje Srbije 'Dr Milan Jovanović Batut' procene efekti zdravstvenog sistema Republike Srbije i ukaže na parametre ovoga sistema koji određuju stanje zdravlja stanovništva. Rezultati Od 2004. do 2012. godine kardiovaskularne bolesti su bila najčešća oboljenja u Srbiji (50%). U 2012. godini bolesti digestivnog sistema bile su na drugom mestu. Na trećem mestu su maligne i bolesti nervnog sistema. U periodu 2007-2012. zabeležen je i blag pad nataliteta, smanjio se i broj smrtnih slučajeva, ali je stopa mortaliteta porasla sa 13,9 na 14,2. Sistem zdravstvene zaštite u Srbiji se finansira kroz kombinaciju državnih finansija i privatnih doprinosa. Primarna zdravstvena zaštita se odvija u 158 domova zdravlja, zdravstvenih stanica i ambulanti, a sekundarne i tercijarne službe rade u opštim i specijalnim bolnicama, institucijama, klinikama i kliničko- bolničkim centrima. Zaključak Značajan, ali nedovoljan, napredak postignut je u oblasti pokazatelja zdravstvenog stanja, kao najvažnijeg konačnog ishoda učinka zdravstvenog sistema. Tranzicija državnog sistema zdravstvene zaštite u Srbiji od komunističkog perioda do danas i usporeno integrisanje s Evropskom Unijom je nedovršen proces

Primena potpornih konstrukcija u sanaciji klizišta na regionalnom putu Stolice - Krupanj

Landslides can be triggered by different factors including changeable weather conditions, prolonged heavy rains, complex terrain, traffic loads, etc. This paper deals with the problem of landslide rehabilitation on the Stolice-Krupanj regional road that resulted from vehicle loads and soil saturated with water. The technical measures used in the rehabilitation of the landslide included a concrete retaining wall and a geogrid-reinforced soil structure. Based on data related to soil obtained from laboratory tests, slope stability before and after applying rehabilitation measures was tested in the GEO5 Geotechnical software. The stability of the concrete wall was examined analytically by calculating the factors of safety against toppling and horizontal displacement. Both technical measures of given physicalmechanical properties increased the stability of the slope.Na pojavu klizišta mogu uticati mnogi faktori: promenljivi klimatski uslovi; velika količina padavina u kratkom periodu; složenost strukture terena; opterećenja od saobraćaja, itd. Rad se bavi problemom sanacije klizišta na regionalnom putu Stolice - Krupanj, koje je nastalo usled opterećenja od vozila i zasićenja zemljišta vodom. Tehničke mere koje su primenjene za sanaciju klizišta su: betonski potporni zid i potporna konstrukcija od tla i geomreže. Na osnovu podataka o zemljištu iz laboratorijskih ispitivanja izvršene su provere stabilnosti kosina pre i posle primenjenih mera sanacije u programu GEO5, dok je stabilnost betonskog zida ispitivana analitičkim proračunom faktora sigurnosti na prevrtanje i horizontalno pomeranje. Obe tehničke mere, zadatih fizičko mehaničkih karakteristika, povećale su stabilnost padine

Recyclability of technology metals from e-waste: case study of In and Ga recovery from magnetic fraction

This study presents the results of the theoretical assessment and a preliminary experimental investigation of technology metals (TM) recovery from magnetic fraction obtained after mechanical treatment of waste printed circuit boards (WPCBs). Experimental work included physical and chemical characterization, thermodynamic analysis, and pyrometallurgical tests corresponding to secondary lead, copper, and steel metallurgy. Technology metals recyclability and recovery potential were evaluated with respect to their distribution between metal and slag phase (difficult for recovering) versus the dust phase (easy for recovering). According to obtained results, it was determined that high-temperature processing of magnetic fraction in the electric arc furnace promotes volatilization of the TM and their pre-concentration in the filter as a dust product from which they could be valorized using further hydrometallurgical methods