The Improvement of Accuracy of Some Photocolorimetric Methods. for the Determination of Fluorides in Water

In the tenth edition of the American Standard Methods for the E x amination of Water and in the International Standards for Drinking Water2 , there is only one universally accepted method for the colorimetric d etermination of fluorides in water·, the zirconium-alizarin method, which is in use in several modifications, the Scott-Sanchis one being the most widely used

Why are the institutional injustice and the lack of fairness omnipresent in serbia? A pragmatic assessment of plural orders of worth

Recent results from Round 9 of the European Social Survey (ESS) indicate that Serbia differs from other European countries in terms of justice and fairness. Whereas the Serbian people’s dissatisfaction relating to unjust income distribution, unfair employment chances and political institutions may not be surprising, these findings still raise a dozen questions. Situated within contemporary discussions on normativity in sociology and survey methodology, this paper aims to reassess the moral grammar of these judgments. By endorsing tenets of pragmatic sociology and its principal aim to recognize the plural modes of valuation and criticism and reflective capacities of social actors to judge and evaluate, this paper develops around few major points. First, we underline how most major approaches to axiology remain stuck in a co-determinist framework, thereby renewing a number of dualisms. Instead, we opt for a relational approach and further present how the theoretical model of Boltanski and Thevénot enables the locating of different assessments of worth. After setting our methodological framework against the “externalist” epistemology, we explore our key assumption that the above-mentioned high rates come as a problem of a feasible “truce” between the domestic regime and the civic polity, ruled by proclaimed legality, representativeness and impersonal character. We trace the problem of incorporating multiple arrangements as a problem of generality, by relating these to two layers of information acquired through the ESS. One involves the analysis of the domestic polity covering the household situation in terms of organization and unveiling the specific worth given to care and protection. Another layer is derived from regression analysis which affirms that the absence of fairness in civic polity correlates with a higher degree of worth given to the domestic one, but also that the latter situation depicts a deeper ontological puzzle about making a mild transition to the assumed “horizontality” of civic matters

Allergen labelling in meat, dairy and cereal products from the Serbian market

Allergens in food are a great health risk, because of the ratio of severity of problems compared to small amounts of ingested allergen. Since 2014, Serbian producers and importers of food have been obliged to declare allergens from the list of Codex Alimentarius on the product packaging. Surveillance of different meat, diary, and cereal product took place in 2016, with aim of checking if the Serbian regulatory requirements for labelling of allergens in food are being fulfilled. Out of 68 different meat products, 20 were not labelled for allergens. Thirty-six labels of various dairy products were examined revealing that allergen information was included on 27 of them. Only one of eight examined cereal products did not have allergen labelling

The effect of childhood poly-victimization on adulthood aggression:The mediating role of different impulsivity traits

This study investigated the effect of the poly-victimization pattern of traumatic childhood experiences on aggression via the impulsivity traits positive urgency, negative urgency, lack of perseverance, lack of premeditation, and sensation-seeking in 102 poly-victims of childhood trauma (71.57% were females; Mage = 35.76; SDage = 15.91). Analyses with poly-victimization as an independent variable, impulsivity traits as parallel mediators, (1) reactive aggression or (2) proactive aggression as dependent variables, and gender as a covariate revealed that the poly-victimization did not have a direct or indirect effect on reactive or proactive aggression, nor did it have an effect on any of the impulsivity traits. Moreover, lack of premeditation had a positive direct effect on reactive aggression, while gender was a significant covariate in both models, with males reporting more aggression than females. Findings suggest that the poly-victimization does not influence impulsivity traits and aggression in adulthood. However, in males, the poly-victimization had a positive and moderate correlation with reactive aggression and negative urgency, while these correlations were absent in females. This finding implies that males are more vulnerable to the adverse effects of childhood poly-victimization than females

Genetic variation and correlations of life-history traits in gypsy moths (Lymantria dispar L.) from two populations in Serbia

Periodic fluctuations in density impose different selection pressures on populations of outbreaking Lepidoptera due to changes in their nutritional environment. The maternal effects hypothesis of insect outbreak predicts the transmission of this nutritional "information" to subsequent generations and alterations in offspring life-history traits. To test for these time-delayed effects of the parental generation, we compared life-history traits and their variation and covariation among laboratory-reared gypsy moths hatched from egg masses collected from low- and medium-density populations. Decreased individual performance was recorded in offspring from the medium-density population, indicating reduced egg provisioning under crowding conditions. Genetic variance and covariance were also shown to be sensitive to density of the parental generation. In gypsy moths from the medium-density population, quantitative genetic analysis revealed significantly higher broad-sense heritabilities for development duration traits and demonstrated a trade-off between development duration and body size

Digital Manufacturing in SMEs based on the context of the Industry 4.0 framework-one approach

Serbia is rapidly working on the development and implementation of digital manufacturing models in SMEs, through the national Industry 4.0 Platform. The aim is to create a pilot intelligent workshop which would be used to develop and showcase examples of best practice for digital manufacturing. Currently, most SMEs use CAD, CAM, ERP models, which form the basis for the development of the concept of digital manufacturing through cloud computing, BDA, IIoT and smart supply-chains, as elements of Industry 4.0. This paper gives a practical example of an SME with all the above-mentioned elements of digital manufacturing

NORMALIZATION OF HEALTH RECORDS IN THE SERBIAN LANGUAGE WITH THE AIM OF SMART HEALTH SERVICES REALIZATION

The development of information technology increases its use in various spheres of human activity, including healthcare. Bundles of data and reports are generated and stored in textual form, such as symptoms, medical history, and doctor’s observations of patients' health. Electronic recording of patient data not only facilitates day-to-day work in hospitals, enables more efficient data management and reduces material costs, but can also be used for further processing and to gain knowledge to improve public health. Publicly available health data would contribute to the development of telemedicine, e-health, epidemic control, and smart healthcare within smart cities. This paper describes the importance of textual data normalization for smart healthcare services. An algorithm for normalizing medical data in Serbian is proposed in order to prepare them for further processing (F1-score=0,816), in this case within the smart health framework. By applying this algorithm, in addition to the normalized medical records, corpora of keywords and stop words, which are specific to the medical domain, are also obtained and can be used to improve the results in the normalization of medical textual data.

Grandiose and vulnerable narcissism, identity integration and self-control related to criminal behavior

BACKGROUND: Although systematic research on narcissism has been conducted for over 100 years, researchers have only recently started to distinguish between grandiose and vulnerable narcissism in relation to criminal behavior. In addition, there is some evidence suggesting that identity integration and self-control may underlie this association. Therefore, the present study aimed to develop a theory-driven hypothetical model that investigates the complex associations between grandiose and vulnerable narcissism, identity integration, self-control, and criminal behavior using structural equation modeling (SEM). METHODS: The total sample (N = 222) included 65 (29.3%) individuals convicted of criminal behavior and 157 (70.7%) participants from the community, with a mean age of 37.71 years (SD = 13.25). Criminal behavior was a grouping variable used as a categorical outcome, whereas self-report questionnaires were used to assess grandiose and vulnerable narcissism, self-control, and identity integration. RESULTS: The overall SEM model yielded good fit indices. Grandiose narcissism negatively predicted criminal behavior above and beyond the influence of identity integration and self-control. In contrast, vulnerable narcissism did not have a direct significant effect on criminal behavior, but it was indirectly and positively associated with criminal behavior via identity integration and self-control. Moreover, grandiose narcissism was positively, whereas vulnerable narcissism was negatively associated with identity integration. However, identity integration did not have a direct significant effect on criminal behavior, but it was indirectly and negatively associated with criminal behavior via self-control. Finally, self-control was, in turn, negatively related to criminal behavior. CONCLUSIONS: We propose that both subtypes of narcissism should be carefully considered in clinical assessment and current intervention practices. SUPPLEMENTARY INFORMATION: The online version contains supplementary material available at 10.1186/s40359-021-00697-1

Do-it-yourself microfluidics and possibilities for micro PIV

U odnosu na najčešće korišćene metode za proizvodnju mikrokanala, postupak koji je izložen u ovom radu ima sledeće prednosti: jednostavnost, niža cena potrebne opreme i velika ušteda u vremenu. Korišćenjem laserskog štampača moguće je ostaviti trag mastila na listu od termoplastičnog materijala, u obliku željenog mikrokanala. Zatim se list ubacuje u zagrejano ulje gde dolazi do izotropnog smanjivanja njegove dužine i širine, i istovremeno do povećavanja debljine. Na taj način se dobija kalup. Pripremljena PDMS masa se izliva na kalup i zatim peče. Nakon pečenja, kalup se odvaja od PDMS mase u kojoj se sada nalazi udubljenje koje predstavlja mikrokanal. Kada se uređaj pričvrsti za podlogu, i kada se naprave ulazni i izlazni otvori, spreman je za korišćenje. Na ovaj način moguće je napraviti veoma složene mikrokanale promenljivih dimenzijama, korišćenjem opreme koja nije skupa i u veoma kratkom vremenskom roku. U okviru rada su prikazane i vizualizacije strujanja u kanalima koji su napravljeni u okviru radionice 'Do-it-yourself Microfluidics Workshop' koja je održana na Mašinskom fakultetu Univerziteta u Beogradu. Dat je i kratak osvrt na mogućnosti primene mikro PIV merne tehnike.We present a method for microfluidic channel fabrication that has the following advantages compared to conventionally-used methods: technical simplicity, dramatically lower fabrication costs, and fabrication time. The method entails printing channel designs on a thermoplastic film from a LaserJet printer. Exposure to high temperatures elicits isotropic shrinkage of the film (in the x-y plane), in addition to thickening (in the z-direction), resulting in a positive relief mold. The microfluidic channel design of the mold is then transferred to a polydimethyl siloxane (PDMS) chip through soft lithography, resulting in a ready-to-use microfluidic chip. Through this approach, chips with complex channel geometries can be generated with low cost equipment and in as little as a couple hours. Flow visualizations from several chips from the 'Do-it-yourself Microfluidics Workshop', held at the Faculty of Mechanical Engineering Univeristy of Belgrade, are presented in this paper. We also discuss possibilities for adapting micro particle image velocimetry (PIV) measurements to channel designs on PDMS-based microfluidic chips using the fabrication method delineated here