Development of method for measuring the intellectual capital of companies

Intelektualni kapital je neopipljivo jedinstvo obično nevidljivih resursa i aktivnosti baziranih na znanju koje dodaju vrednost organizaciji u očima internih i eksternih aktera (stejkholdera). U radu se istražuje mogućnost merenja ovog nematerijalnog konstrukta, sačinjenog od ljudskog, organizacionog i relacionog kapitala. Metoda za merenje, odnosno monetarnu valuaciju, uspešno je razvijena, a predloženi model verifikovan je statističkom analizom. Metoda je namenjena prvenstveno eksternom izveštavanju, ali se usled velike preciznosti, pouzdanosti i proverljivosti rezultata može koristiti i kao kontrolna alatka menadžmenta.Intellectual capital is the intangible unity of usually invisible knowledge-based resources and activities that add value to an organization in the eyes of internal and external stakeholders. This study explores the possibility of measuring that intangible construct composed of human, organizational and relational capital. The method for measurement and monetary valuation has been successfully developed and the proposed model was verified by statistical analysis. The method is intended primarily for external reporting, but due to high accuracy, reliability and verifiability of results can also be used as a tool of management control

Resveratrol/Selenium Nanocomposite with Antioxidative and Antibacterial Properties

In this work, we synthesized a new composite material comprised of previously formulated resveratrol nanobelt-like particles (ResNPs) and selenium nanoparticles (SeNPs), namely ResSeNPs. Characterization was provided by FESEM and optical microscopy, as well as by UV-Vis and FTIR spectroscopy, the last showing hydrogen bonds between ResNPs and SeNPs. DPPH, TBA, and FRAP assays showed excellent antioxidative abilities with ResNPs and SeNPs contributing mainly to lipid peroxidation inhibition and reducing/scavenging activity, respectively. The antibacterial effect against common medicinal implant colonizers pointed to notably higher activity against Staphylococcus isolates (minimal inhibitory concentrations 0.75–1.5%) compared to tested gram-negative species (Escherichia coli and Pseudomonas aeruginosa). Antibiofilm activity against S. aureus, S. epidermidis, and P. aeruginosa determined in a crystal violet assay was promising (up to 69%), but monitoring of selected biofilm-related gene expression (pelA and algD) indicated the necessity of the involvement of a larger number of genes in the analysis in order to further establish the underlying mechanism. Although biocompatibility screening showed some cytotoxicity and genotoxicity in MTT and alkaline comet assays, respectively, it is important to note that active antioxidative and antibacterial/antibiofilm concentrations were non-cytotoxic and non-genotoxic in normal MRC-5 cells. These results encourage further composite improvements and investigation in order to adapt it for specific biomedical purposes

Development of method for measuring the intellectual capital of companies

Intelektualni kapital je neopipljivo jedinstvo obično nevidljivih resursa i aktivnosti baziranih na znanju koje dodaju vrednost organizaciji u očima internih i eksternih aktera (stejkholdera). U radu se istražuje mogućnost merenja ovog nematerijalnog konstrukta, sačinjenog od ljudskog, organizacionog i relacionog kapitala. Metoda za merenje, odnosno monetarnu valuaciju, uspešno je razvijena, a predloženi model verifikovan je statističkom analizom. Metoda je namenjena prvenstveno eksternom izveštavanju, ali se usled velike preciznosti, pouzdanosti i proverljivosti rezultata može koristiti i kao kontrolna alatka menadžmenta.Intellectual capital is the intangible unity of usually invisible knowledge-based resources and activities that add value to an organization in the eyes of internal and external stakeholders. This study explores the possibility of measuring that intangible construct composed of human, organizational and relational capital. The method for measurement and monetary valuation has been successfully developed and the proposed model was verified by statistical analysis. The method is intended primarily for external reporting, but due to high accuracy, reliability and verifiability of results can also be used as a tool of management control

Using Bayesian network and AHP method as a marketing approach tools in defining tourists’ preferences

Marketing approach is associated to market conditions and achieving long term profitability of a company by satisfying consumers’ needs. This approach in tourism does not have to be related only to promoting one touristic destination, but is associated to relation between travel agency and its clients too. It considers that travel agencies adjust their offers to their clients’ needs. In that sense, it is important to analyze the behavior of tourists in the earlier periods with consideration of their preferences. Using Bayesian network, it could be graphically displayed the connection between tourists who have similar taste and relationships between them. On the other hand, the analytic hierarchy process (AHP) is used to rank tourist attractions, with also relying on past experience. In this paper we examine possible applications of these two models in tourism in Serbia. The example is hypothetical, but it will serve as a base for future research. Three types of tourism are chosen as a representative in Vojvodina: Cultural, Rural and Business tourism, because they are the bright spot of touristic development in this area. Applied on these forms, analytic hierarchy process has shown its strength in predicting tourists’ preferences

TESTIRANJE EFIKASNOSTI TRŽIŠTA: PUT KA ODREĐIVANJU SUŠTINSKE VREDNOSTI

The paradigm of market equilibrium and the “efficient-market hypothesis” tied to it, dealing specifically with the behavior of capital markets, has no explanation for financial bubbles and their bursting that is leading to stock market crashes. Accordingly, the main goal of this paper is to discuss the inefficiency of markets, with examples of corporate decisions that directly abuse such inefficiency to psychologically motivate desired behavior of potential customers. To test the efficiency market hypothesis, we have used Stoxx Europe 600 index historical closing daily prices, for the period from 2012–2022. Using both non-parametric and parametric tests, such as the Kolmogorov–Smirnov test, run–test for random order, and ARIMA regression, we reject the hypothesis that the market is efficient in a weak form because it doesn’t follow a random walk. Also, basic-level problems of economic theory were analyzed, emphasizing the view that perhaps the time has come to align the fundamentals of economic theory with basic concepts that have been used in practice for years.Paradigma tržišne ravnoteže i za nju vezana „hipoteza efikasnog tržišta“, koja se posebno bavi ponašanjem tržišta kapitala, nema objašnjenja za finansijske mehure i njihovo pucanje koje dovodi do kraha berze. Shodno tome, osnovni cilj ovog rada je da se diskutuje o neefikasnosti tržišta, uz primere korporativnih odluka koje direktno zloupotrebljavaju takvu neefikasnost da bi psihološki motivisale željeno ponašanje potencijalnih kupaca. Za testiranje hipoteze efikasnosti tržišta koristili smo Stoxx Europe 600 indeks istorijskih dnevnih cena akcija u periodu od 2012–2022. Koristeći neparametarske i parametarske testove, kao što su Kolmogorov–Smirnov test, run–test i ARIMA regresija, odbacujemo hipotezu da je tržište efikasno u slabom obliku jer ne prati slučajni hod. Takođe, u radu su analizirani i osnovni problemi ekonomske teorije, naglašavajući stav da je možda došlo vreme da se fundamenti ekonomske teorije usklade sa osnovnim konceptima koji se godinama koriste u praksi

Karakterizacija zavarenih spojeva cevi od čelika X20CrMoV121 dobijenih različitim tehnologijama zavarivanja

Toplotno postojani martenzitni čelik X20CrMo12 1 je našao široku primenu na domaćim termoenergetskim (TE) postrojenjima za izradu izlaznih sekcija pregrejača cevnog sistema kotla, kao i debelozidih komponenti kao što su kolektori izlaznih pregrejača i parovodi sveže pare. Dugotrajne karakteristike ovog čelika su detaljno istraživane i najvećim delom razjašnjene i kao toplotno postojani čelik spada u klasu najkvalitetnijih čelika do sada napravljenih. Međutim, pored svih prednosti glavni nedostatak ovog čelika je njegova loša zavarljivost. Zavarivanje na licu mesta, martenzitnih čelika je uvek veliki izazov i vrlo je teško dobiti kvalitetan zavareni spoj u kratkom vremenskom periodu, koliko recimo traju nepredviđeni zastoji bloka. U ovom radu je, radi poređenja, data karakterizacija tri zavarena spoja cevi pregrejača izrađenog od čelika X20CrMoV12 1, zavarena različitim tehnologijama zavarivanja: fabrički spoj dobijen zavarivanjem varničenjem, sa srodnim dodatnim materijalom i sa austenitnim dodatnim materijalom