Internal Sources of Financing Companies on the Basis of Static and Dynamic Indicators: Comparative Analysis

AbstractThe Republic of Serbia is characterized by an unsatisfactory macroeconomic environment (high degree of illiquidity, high inflation rate, rising unemployment, decline in the level of capacity utilization, followed by the process of globalization, deregulation and liberalization of the market with all its negative connotations to the growth and development of our country). Under such conditions where there is a shortage of liquid assets, the financial capital has moved from the real to the financial sector, which led companies to over-indebtedness and shutdown of their own capacities. Therefore, capital investments largely depend on internal sources of financing and the ability of companies to internally generate funds for investments. In this regard emphasis is placed on the difference in the assessment of the investment ability of companies based on internal sources of financing measured using static and dynamic indicators in order to prove the necessity of applying dynamic coefficients which unfortunately are not present in our domestic practice

Proposition of OSCE's reforms in the light of contemporary political crisis in Europe

The Paper observes the foundation and development of OSCE as the most important contemporary security organization from the perspective of historical and political dynamics and the interests of international subjects. Originally founded as Forum for the reduction of tensions between ideologically confronted East and West, OSCE (than: CSCE) has evolved into permanent security organization with diversified activities and jurisdictions. However, that evolution failed to be up to the new challenges, so the needs for further reforms of OSCE reemerged. Second part of the Paper follows the propositions of OSCE system reforms, made by its member states, by Panel (formed on Council of Ministers in Sofia, in December 2004) and by Russia that has even proposed 'Agreement of European security' as the basis for completely new remaking of European security out of the existing OSCE system. In the final part of the Paper, influences of contemporary political crises in OSCE member states on the possible reform of this security organization are being analyzed

Proces dobijanja stabilne disperzije kalcijum-karbonata za potrebe papirne industije

This paper presents the optimized technological process for obtaining stable calcium carbonate dispersion (CaCO3) in accordance to the standard prescribed in the paper industry. The reason for using CaCO3 in paper production is their low price when compared to the cellulose fibers and its ability to improve the properties of the final product. However, CaCO3 is alkaline filler that has relatively poor chemical stability that may affect the characteristics of the paper. For this reasons it is necessary to optimize the technology for obtaining a stable dispersion of CaCO3 with particles diameter in range 1 mm lt Dsr lt 2 mm, a pH of 9.7 and a viscosity of η lt 300 mPas. Diglycerintereftalate (DGTP) (dispersant - D1) and diethylene glycolterephthalate (DEGTP) (dispenser - D2) were synthesized from the waste poly(ethylene terephthalate) (PET) in addition to commercial - sodium tripolyphosphate (Na-TPP-D3) used in the grinding process. The pH stabilization was established with the addition of glycine/NaOH buffer, which allowed obtaining the dispersion with standard values of particle size, pH, viscosity and stability.U radu je opisana optimizacija tehnološkog procesa dobijanja stabilne disperzije kalcijum-karbonata (CaCO3) po standardima koje propisuje papirna industrija. Razlog korišćenja CaCO3 u proizvodnji papira je njegova niska cena u odnosu na celulozna vlakna i njegova sposobnost da poboljša svojstva konačnog proizvoda. Međutim, CaCO3 je alkalni punilac koji ima relativno lošu hemijsku stabilnost i može značajno uticati na karakteristike papira. Iz tog razloga je neophodno optimizovati tehnologiju dobijanja stabilne disperzije CaCO3 sa vrednostima srednje veličine čestica u opsegu 1 mm lt Dsr lt 2 mm, pH vrednosti 9,7 i viskoziteta η lt 300 mPas. Sintetisani su dispergatori iz otpadnog poli(etilentereftalata) (PET-a): diglicerintereftalata (DGTP) (dispergator - D1) i dietilenglikoltereftalata (DEGTP) (dispegator - D2) koji su pored komercijalnog - natrijum-tripolifosfata (Na-TPP - D3) korišćeni u procesu mlevenja. Stabilizacija pH vrednosti je uspostavljena sa dodatakom glicin/NaOH - pufera što je omogućilo dobijanje disperzije standardnih vrednosti veličina čestica, pH vrednosti, viskoznosti i stabilnosti

Control Process of Adhesion of Acrylic Films on a Brass Substrate With Improved Fire Resistance

U okviru predmetnog pronalaska izvedeno je istaživanje uticaja stukture poliedarnih oligo silsekvioksana (POSS) na adheziju kompozitnih filmova na metalnoj podlozi. Kompozitni filmovi se sastoje od UV polimerizovane Bisfenol A-glicidil dimetakrilata i trietilen glikol dimetakrilat (Bis-GMA/TEGDMA) matrice i reaktivne POSS strukture za poboljšanje adhezije. Kompozitni filmovi napravljeni su sa 1, 3, 5 i 10 mas. % POSS reagenasa. Adhezija je procenjena pomoću ispitivanja mikrotvrdoće metodom po Vikersu. Ugao kvašenja kompozitnih filmova metalne podloge od mesinga meren je i poređen sa parametrom adhezije koji je dobijen iz merenja mikrotvrdoće. Optička mikroskopija pokazala je fazno razdvajanje POSS reagensa koji ukazuju na meru kompatibilnosti između matrice i svake čestice. Analiziran je oblik i veličina otiska i bio je u korelaciji sa kvalitetom adhezije. Metode korišćene u ovom radu za procenu jačine i kvaliteta adhezije jasno su pokazale da je poboljšanje adhezije Bis- GMA/TEGDMA matrice i POSS reagensa koji sadrži funkcionalnu hidoksilnu i metakrilnu grupu.Within the scope of the present invention,the effect of the structure ofpolyhedral oligomeric silsesquioxane (POSS) on the adhesion of composite filmson metal supstrate has been researched. Composite filmscosistof UV polymerisedBisphenol A-glycidylmethacrylateandtriethylene glycol dimethacrylate (Bis-GMA/TEGDMA) matrixand reactive POSS structure to improve adhesion. Composite films are made with 1, 3, 5 and 10 wt. % of POSS reagents. Adhesion was assessedby Vickers micro-hardness test method. The wetting angle ofcomposite filmsof the brass metal substrate was measured and compared with the adhesion parameter obtained from the microhardness measurement.Optical microscopy showed phase separation of POSS reagentwhich indicating a measure of compatibility between the matrix and each particle. The shape and size of the print were analysed and correlated with the quality of adhesion. The methods used in this studyto evaluatethe strength and quality of adhesion clearly showed that the improvement of adhesion ofBis-GMA/TEGDMA matrxand POSS reagentcontaining a functional hydroxyl and methacrylic group.Registarski broj: 64831; Broj i datum rešenja o priznanju prava: 2023/11047 23.11.2023; Datum objavljivanja prijave i broj službenog glasila (A1/A2): (A1) 30.04.2020 4/2020; Broj i datum prijave: П-2018/1274 24.10.2018

An End-to-End Deep Learning Method for Voltage Sag Classification

Power quality disturbances (PQD) have a negative impact on power quality-sensitive equipment, often resulting in great financial losses. To prevent these losses, besides detecting a PQD on time, it is important to classify it, so that appropriate recovery procedures are employed. The majority of research employs machine learning model PQD classifiers on manually extracted features from simulated or real-world signals. This paper presents an end-to-end approach that circumvents the manual feature extraction and uses signals generated from mathematical voltage sag type formulas. We developed a configurable voltage sag generator that was used to form training and validation datasets. Based on the synthetic three-phase voltage signals, we trained several end-to-end LSTM classifiers that classify voltage sags according to ABC classification. The best-performing model achieved an accuracy of over 90% in the real-world dataset

An End-to-End Deep Learning Method for Voltage Sag Classification

Power quality disturbances (PQD) have a negative impact on power quality-sensitive equipment, often resulting in great financial losses. To prevent these losses, besides detecting a PQD on time, it is important to classify it, so that appropriate recovery procedures are employed. The majority of research employs machine learning model PQD classifiers on manually extracted features from simulated or real-world signals. This paper presents an end-to-end approach that circumvents the manual feature extraction and uses signals generated from mathematical voltage sag type formulas. We developed a configurable voltage sag generator that was used to form training and validation datasets. Based on the synthetic three-phase voltage signals, we trained several end-to-end LSTM classifiers that classify voltage sags according to ABC classification. The best-performing model achieved an accuracy of over 90% in the real-world dataset

Re-evaluating disability assessment in war veterans with posttraumatic stress disorder

Background/Aim. Sametimes war veterans may resort to such strategies as preducing exaggerated symptoms and malingerating in order to obtain material compensation rights. The aim of this study was to assess the accuracy of the diagnosis of posttraumatic stress disorder (PTSD) on the basis of which war veterans were entitled to a financial compensation due to their disability. Methods. The diagnoses of 259 war veterans were re-evaluated. Veterans were previously diagnosed by a psychiatrist on local level, while regional state medical commission determined the degree of disability and the right to a financial compensation. A team of experts, consisting of psychiatrists with research experience in the field of traumatic stress and who were trained to use a structured interview for PTSD, conducted the evaluation of medical data from veterans’ military records. The diagnostic process was conducted using the standardized diagnostic interview (Clinician-Administered PTSD Scale – CAPS), after which the diagnosis was reaffirmed or reviewed. This influenced disability status and consequential financial compensation. Results. There was a remarkable difference between the first diagnostic assessment of PTSD, conducted by the psychiatrists on local level, and the second evaluation conducted by the team of experts. In more than half of 259 veterans (52.1%) diagnosed with PTSD in the first assessment the diagnosis was not confirmed. The diagnosis was confirmed in 31.7% of veterans. Those veterans who were diagnosed with lifetime PTSD (7.3%) should also be treated as accuratelly diagnosed. This means that a total of 39% of the diagnoses were accurate. The rest (8.9%) were diagnosed with other diagnoses, but not PTSD, as was the case in the initial assessment. Conclusion. The possibility for war veterans to obtain the right to disability and financial compensation due to a diagnosis of PTSD might interfere with the proper diagnostic assessment and thus the treatment outcome. During the procedures for the obtention of these rights, exaggeration or simulation of symptoms are common. The quality of the diagnostic assessment of PTSD can be improved by applying evidence based standardized procedures

Remote sensing and nuclear techniques for high-resolution mapping and quantification of gully erosion in the highly erodible area of the Malčanska River Basin, Eastern Serbia

Gully erosion leads to the formation of deep and wide channels that increase the risk of soil loss, flooding, and water pollution. In addition, this process reduces the productivity and viability of agricultural land and natural ecosystems. Preventing gully erosion is critical for maintaining ecological balance and preserving natural resources in certain areas. This paper presents a methodology integrating remote sensing and nuclear techniques to study gully erosion. The morphometric characterization of gullies using 360-degree camera photogrammetry was introduced as a new method in erosion research. This approach aims to investigate the suitability of unmanned aerial vehicle and terrestrial photogrammetry for modeling gullies, to study the variability of erosion processes in gullies at a small scale, and to compare the differences in erosion intensity between nearby gullies. The study’s objectives include identifying the effective and economical method for gullies monitoring and providing a starting point for controlling and safeguarding gullies. Mainly erosion process was detected in the studied gullies, while deposition was identified at only 2 out of 39 sampling locations. The results showed an average soil redistribution rate of 16.2 t ha− 1 yr− 1 and coefficients of variation of 32%, 59%, and 91% for three investigated gullies. It was determined that aerial photogrammetry methods were not practical under the conditions prevailing in the study area. Highly detailed 3D models of the gullies were created using 360-degree photogrammetry. It was confirmed that the micro-relief obtained by photogrammetric modeling is an essential contribution to erosion research. The 360-degree camera photogrammetry serves as a reliable tool for analyzing the morphology of gullies and, in perspective, tracking changes in gully systems over time or monitoring the effectiveness of the applied protection measures