Fenomenologija prestupništva maloletnika u srbiji od 2009. Do 2018.

Društveno neprihvatljivo ponašanje mladih nije nova pojava, postoji još od davnina samo što je vremenom menjalo način na koji se ispoljava, uzroci su bili različiti i mere sankcionisanja su se razlikovale. Maloletničko prestupništvo uslovljeno je različitim porodičnim, psihološkim, sociološkim i društvenim faktorima. U zavisnosti sa kog aspekta se posmatra, definisanje ovog fenomena će biti drugačije, to dalje implicira njegovu složenost u determinisanju. Kako bi se bolje shvatila ova pojava, a naročito konkretni prestupi i njihovi maloletni počinioci potrebno je uzeti u obzir sve potencijalne faktore koji su uticali na njegov nastanak. Zbog toga ćemo se u radu posebno fokusirati na determinisanje ovog fenomena, kao i etiološko-fenomenološke karakteristike prestupništva maloletnika. Pritom treba uzeti u obzir uticaj porodice koja predstavlja važnu osnovu za razvoj svakog pojedinca, ali i društvenu sredinu, kako ona utiče na maloletne prestupnike, kakav stav zauzima prema njima i kako su takvi prestupi sankcionisani. Važne podatke koje ćemo prikazati kroz fenomenologiju prestupništva maloletnika, odnosno obim i strukturu i krivičnopravnu reakciju na prestupništvo u periodu od 2009. do 2018. godine, predstavljaju relevantnu osnovu za objektivan uvid u kompletnu sliku o prestupima mladih u Srbiji. Sastavni deo društva, odnosno praćenja važnih dešavanja u društvu, svakako jesu mediji. U empirijskom delu rada analiziraćemo kakvu sliku mediji plasiraju o prestupima maloletnika i da li se ona poklapa sa zvaničnim podacima. Na osnovu relevantne literature analiziraćemo autentičnost medijskog izveštavanja, etiku u medijima, njihovu društvenu ulogu, medije u kontekstu moralne panike da bismo stekli celovitu sliku o medijskom izveštavanju o prestupništvu mladih.The socially unacceptable behavior of young people is not new phenomenon, it has existed since ancient times only what is temporally masculine the way it manifests, the degree to which they were different and sanctions have been otherwise. Juvenile delinquency is conditioned by various family, psychological, sociological and social factors. Depending on which aspect will be retained, the definition of this phenomenon will be different, in order to further imply its complexity in determination. In order for this phenomenon to occur better, and especially specific offenses and juvenile offenders, all potential factors that influenced its occurrence should have been taken into account. Therefore, we will focus in this text on determining this phenomenon, as well as the etiological-phenomenological characteristics of juvenile delinquency. In doing so, it should take into account the influence of the family, which is an important basis for the development of each individual, but also the social environment, how it uses juvenile offenders, how to deal with them and how such offenses are sanctioned. Important data that will be presented through the phenomenology of juvenile delinquency, regarding the scope and structure and criminally correct response to delinquency in the period from 2009 to 2018, are relevant databases for facilities that are an insight into the complete picture of youth crime in Serbia. The media are certainly an integral part of society, regarding monitoring important events in society. In the empirical part of the text, we will analyze what kind of media show we will place about juvenile delinquency and whether it will be published with official data. Based on the relevant literature, we will analyze the authenticity of media reporting, ethics in the media, our social affiliation, the media in the context of moral panic so that we should gain a complete picture of media reporting on youth crime

Numerička karakterizacija efikasnosti zaštite kućišta sa otvorima na bazi sprege sa žičanim strukturama

One of the fundamental tasks in designing electronic systems is to fulfill conditions of electromagnetic compatibility - EMC. EMC defines the capability of an electronic system to satisfactorily function in its electromagnetic (EM) environment not disturbing the operation of other neighboring devices. EMC has become one of the main aspects that has to be considered in the design of electronic systems because of the increasing number and rapid growth of EM intereference sources. It has been noticed that foreseeing the protection measures during the design phase is simpler and much more efficient than applying those measures on a completed system, which often becomes impossible. The fulfillment of EMC requirements is regulated by a set of standards. In Europe, all standards have to be harmonized with the Directive for Electromagnetic Compatibility (2004/108/EC). Those standards regulate limits of emission (the highest emission level of a source of EM interference), limits of immunity (the highest level of EM interference on a device with no degradation or with acceptable degradation of its performances) and the measuring conditions and methods. One of the ways to reduce the emission and increase the immunity of an electronic system in its real environment is to place it in a protective metal enclosure. Characteristics of the enclosure regarding EMC are evaluated by a parameter called shielding effectiveness - SE. SE is the ratio between the field strength without and with the enclosure interposed, at the same observation point. SE can be defined for the electric field (the so-called electric SE) and for the magnetic field (the so-called magnetic SE). Regarding the EMC, performances of the electronic system, i.e. SE level, are influenced by: construction, shape, size and wall thickness of the enclosure, electric and magnetic characteristics of the construction materials (electric conductivity, relative permeability, magnetic susceptibility, etc.), frequency range of the system operation, size, shape and number of apertures, their position on its walls, parameters of excitation plane wave and coupling mechanisms between externaly generated EM interference and EM radiation generated within the various parts of the system. The paths by which external EM interference penetrates into the system are usually the same with the paths by which internally generated disturbances are radiated outside of enclosure. The protective enclosure walls contain apertures of various shapes and purposes, most often used to access and control the system, retract the input and output cables, for ventilation, cooling, etc. Through those apertures, EM radiation penetrates into the enclosure and also into the outer space, disturbing enclosure protective function. In addition to coupling through the apertures, there are also coupling by diffusion through shield walls, coupling with wire structures within the enclosure and with other parts of the system. For proper functioning of the system it is necessary to analyze and determine the nature and level of EM emissions generated by various parts of the system, the influence of externally generated EM interefrence on the system and its parts, as well as their mutual coupling, in order to undertake measures for reducing or eliminating the coupling paths. For determining the SE, various analytical and numerical methods are used alongside with experimental measurements. Analytical methods may be applied only in simple cases and with appropriate approximations. For an example an empty enclosure with apertures may be represented as an equivalent waveguide circuit, in which the enclosure is represented as a shorted waveguide, while the opening is represented as a coplanar strip line short circuited at both ends. The application of analytical methods on complex structures gives only approximate results. Numerical methods, which gained in importance by the use of high performance computers, have become an indispensable tool in modeling and simulation of various realistic EMC problems. By using these methods, research time can be significantly shortened, since the construction of prototypes which do not fulfill the established EMC requirements and thus need additional measurements and subsequent corrections in design can be avoided. The subject of the PhD scientific research is a numerical characterization of the metal enclosures’ protective characteristics, as well as analyses of the shielding effectiveness behavior in EMC relevant frequency range, depending on some of the previously mentioned factors (polarization type of the excitation plane wave and the azimuth and elevation angles under which the plane wave comes across the enclosure walls with apertures, the number of wall apertures and their mutual distance as well as their position with respect to the point in which the SE of enclosure is determined, etc.). Furthermore, the coupling of EM waves that penetrate into the enclosure interior with the wire structures, that can significantly affect the total EM field distribution within the shield and consequently affect its protective function expresses as SE, will be studied. As a numerical tool, a modeling method based on electric transmission lines (transmission line matrix method - TLM method) is used. Thanks to its characteristics, the TLM method has been widely used in solving various EM field propagation problems. The TLM method belongs to the group of differential numerical techniques in the time domain. It is based on the analogy between EM field components and electric currents and voltages in the transmission line network by which the concept of EM field is reduced to the concept of electric circuit theory. Enhancements of the TLM method, in the form of so-called compact models, suitable for efficient modeling of the mutual interaction between the excited EM field and geometrically small but in electrical sense important structures (thin wire structures, complex wire junctions, slots, apertures, etc.) have empowered this metod to be efficiently used for practical EMC problem solving. For an example, besides enabling the modeling of very thin wire structures without the use of an extremely fine mesh around the wire, the compact TLM wire model enables the modeling of the two-ways interaction between the external field and the wire structure. It is based on additional TLM wire nodes introduced to the existing network of TLM nodes, which model signal propagation along the wire and describe the interaction with the EM field. The appropriate numerical TLM model of the enclosure containing apertures and wire and dielectric structures is created in this thesis and then used for the purpose of conducting analyses of their influence on the SE and resonant frequencies of enclosure. In researches a special attention was given to the enclosures with rectangular apertures, since, in the case of unknown plane wave polarization and arbitrary angle under which it faces the wall with apertures, it is more difficult to determine the most critical case from the EMC standpoint (the case when the mere existence of the apertures damages the most the shield’s protective function). The presence of wire structures was considered through several aspects: when the appropriate receiving antenna is brought into the enclosure space in order to measure the EM field level, which corresponds to the procedure of experimental determination of the SE of enclosure; when the current/voltage information induced in the antenna is transmitted through cable to the measuring instrument as well as when the corresponding loaded antenna elements are used for the purpose of damping the resonant frequencies of the enclosure (frequency at which the shielding effectiveness is the lowest). The aim of the scientific research of this PhD is to conduct the detailed assessment of the impact of the parameters of the system’s rectangular apertures, wires and dielectric structures and the plane wave on the SE enclosure and to draw attention to the means of minimizing their disruption of system functioning and complying with EMC standards in their presence. The conclusions arising from these analyses may be of importance in the processes of designing metal enclosures for protecting electronic systems. In addition, the aim is to analyze how the inclusion of additional wire structure within the system, for the purposes of measuring SE or damping the enclosure’s resonant frequencies, affects the protective features of the enclosures and their assessment. Very small, even negative SE enclosure values (which indicates that the shield’s presence enhances, rather than weakens the EM field) usually occur around the resonant frequencies of enclosure. The proposed method for damping the enclosure’s resonant frequencies is investigated in the case when the antenna elements are realized in microstrip technology and is cririclz analyzed from the standpoint of the corrected SE level at resonant frequiencies and possible shift of existing or introduction of additional resonant frequencies. In the experimental procedure for determining the SE enclosure, it is necessary to set up the receiving antenna which is used for the EM field level detection. The antenna of finite dimensions significantly influences the distribution of EM field within the enclosure, and consequently the SE level. For this reason it has been examined how the presence of the receiving antenna and coaxial cable within the enclosure affect the accuracy of measuring the SE of enclosure. The analysis has included the impact of the physical dimensions of the receiving antenna, as well as its position within the enclosure, depending on the parameters of the excitation plane wave (the angle of polarization and the angle of plane wave incidence to the shield defined in the azimuth and elevation plane). The EM field level within the enclosure was evaluated in the dissertation on the basis of the current induced in the receiving antenna, which fully corresponds to the procedure of experimental characterization of the SE of enclosure. This way the influence of the coaxial cable which sends detected signal from the antenna to the measurement instrument was directly involved. The presence of the cable was described through compact TLM wire node which models the wire conductor, but also through appropriate impedance of the cable realized by lumped circuit, which loaded the receiving antenna. The accuracy of the results is verified by comparing with the measured results available in the literature and/or the results obtained by other methods (analytical, numerical). Among the expected results, which represent the scientific contribution of the dissertation, the following can be emphasized: analysis of changes in the SE of empty enclosure with rectangular apertures present on one or adjacent walls, depending on the polarization of the plane wave and its incident angle encountered on the enclosure; efficient characterization of EM coupling of a plane wave with wired elements present inside the enclosure with apertures and the estimation of the influence of this coupling on the SE enclosure using the integrated TLM approach for modeling of thin wire structures, which takes into account the two-way interaction between the wire and the excited EM field; creation of the numerical model of enclosure with receiving antenna that corresponds to the procedure of experimental characterization of SE enclosure where the level of EM field within the enclosure is estimated from the current induced in the receiving antenna; a detailed analysis of the impact of the physical dimensions of the receiving antenna (dipole or monopole antenna) and its position inside the enclosure to the level of detected EM field in the space within the enclosure, and therefore to the level of the SE, and to the position of the enclosure resonant frequencies; analysis of the impact of position and characteristics of the coaxial cable, through which the detected signal is sent from the receiving antenna to the measuring instrument, on the SE of enclosure. Presence of the cable is included directly by specifying a wire conductor or indirectly through matching cable impedance loading the receiving antenna; analysis of damping technique of enclosure resonant frequences (at which the SE of enclosure is the lowest) based on inserting an additional loaded antenna elements, in the form of a dipole antenna realized in microstrip technology, at corresponding positions inside the enclosure

Error bound of certain Gaussian quadrature rules for trigonometric polynomials

In this paper we give error bound for quadrature rules of Gaussian type for trigonometric polynomials with respect to the weight function w(x) = 1+cos x, x ∈ (−π, π), for 2π -periodic integrand, analytic in a circular domain. Obtained theoretical bound is checked and illustrated on some numerical examples

Error bound of certain Gaussian quadrature rules for trigonometric polynomials

In this paper we give error bound for quadrature rules of Gaussian type for trigonometric polynomials with respect to the weight function w(x) = 1+cos x, x ∈ (−π, π), for 2π -periodic integrand, analytic in a circular domain. Obtained theoretical bound is checked and illustrated on some numerical examples

TECHNOLOGICAL CHARACTERISTICS OF INTERSPECIFIC HYBRIDS BRONNER, MUSCARIS AND MORAVA IN BANJA LUKA REGION

Interspecific hybrids are increasingly finding their place in the assortment structure of modern viticulture, thanks to their notable resistance to diseases and adaptability to different climatic conditions. The aim of the research was to determine and compare the basic ampelographic and technological characteristics of the interspecific hybrids - Bronner, Muscaris and Morava with the conventional white wine variety Pinot Blanc, grown in the Banja Luka region (Bosnia and Herzegovina). The variety Muscaris stood out compared to the other analyzed varieties on the basis of the largest grape cluster weight (244.99 g), the weight of 100 grape berries (173.06 g), the weight of 100 grape skins (17.54 g) and the weight of seeds in100 grape berries (11.50 g). This variety also had the highest sugar content in grape juice (27.63 °Brix), followed by the Bronner variety (24.67 °Brix), which, according to the OIV categorization, ranks them among varieties with a very high sugar content. The Morava and Pinot Blanc varieties had a relatively similar sugar content (22.02 and 21.77 °Brix, respectively). The content of total polyphenols in the skins of Bronner variety grapes was statistically significantly higher (1876.73 mg/kg) compared to the other analyzed varieties, while a similar situation was observed in the seeds of the Pinot Blanc variety (2913.68 mg/kg). Based on the results, it was concluded that the variety Muscaris showed the best qualitative characteristics

CYTOKINE PROFILE IN RENAL TRANSPLANT PATIENTS IN A LONG-TERM PERIOD AFTER SURGERY

In the long-term period after kidney transplantation, a certain level of tissue inflammation and therefore the production of proinflammatory cytokines, including TNF-α, IL-1β, IL-18 and IL-2 can be found. The aim of our study was to determine the concentrations of TNF-α, IL-1β, IL-18, IL-2 and its soluble receptor (IL-2R) in renal transplant patients, regarding the length of the postoperative period. The study involved 65 patients, transplanted at least 12 months prior to our investigation, divided into three groups, regarding the time passed since the transplantation (12-24, 24-48, and >48 months consecutively). Concentrations of the cytokines in the plasma of the subjects were measured using ELISA method. Group I showed significantly higher concentrations of IL-1b compared to the III (p<0.05), IL-18 compared to the II and III (p<0.05) and TNF-a compared to the II (p<0.05). Cytokine concentrations correlated with the time passed since the transplantation (p<0.05), except for TNF-a. Interleukin-2 correlated negatively with IL-18 and immunosuppressant dosage (p<0.05). Interleukin-1b, IL-18 and TNF-α measurements should be considered for monitoring and detecting potentially subclinical allograft damage in the second year after surgery. However, the dynamics of the change of cytokine concentration may also have been altered by the components of the immunosuppressive protocols used, such as tacrolimus, which is a link that is yet to be examined

Ocena stopnia zaawansowania miażdżycy u dzieci i młodzieży z cukrzycą typu 1

Introduction: To evaluate the degree of atherosclerosis in children and adolescents with type 1 diabetes and its correlation with risk factors, traditional and other, such as anti-oxidative capacity of circulating blood and level of lipid peroxidation. Material and methods: Forty children and adolescents with type 1 diabetes with mean age 13.7 years were compared with 20 age- and sex-matched healthy control subjects. Association of carotid artery intima-media thickness (cIMT) with different risk factors measured in children with type 1 diabetes was evaluated. Results: Mean carotid IMT was higher in subjects with diabetes (p < 0.01) and was strongly associated with total cholesterol with an odds ratio of 4.08 (p = 0.016), LDL-cholesterol with an odds ratio of 2.78 (p = 0.037), length of disease with an odds ratio of 1.87 (p = 0.007) and positive family history (first- and second-degree relatives) of diabetes and early CVD (heart attack and/or stroke before the age of 60 years) with an odds ratio of 6.8 (p = 0.007). Conclusions: We found significantly increased cIMT in the diabetic patients compared to the healthy control subjects. Risk factors for the development of atherosclerosis included higher total and LDL-cholesterol, higher systolic blood pressure, positive family history of diabetes and early CVD and longer diabetes duration. In spite of the documented increased oxidative stress, we failed to establish a correlation between the oxidative stress parameters and cIMT values. (Endokrynol Pol 2012; 63 (6): 414&#8211;419)Wstęp: Ocena stopnia zaawansowania miażdżycy u dzieci i młodzieży z cukrzycą typu 1 oraz jego korelacja z czynnikami ryzyka, tradycyjnymi i innymi, na przykład potencjałem antyoksydacyjnym krwi krążącej i poziomem peroksydacji lipidów. Materiał i metody: Porównano 40 dzieci i nastolatków z cukrzycą typu 1, średnia wieku 13,7 roku, z 20 zdrowymi osobnikami stanowiącymi grupę kontrolną odpowiednio dobranymi pod względem wieku i płci. Oceniano związek pomiędzy grubością kompleksu błony wewnętrznej i środkowej tętnic szyjnych (cIMT) a różnymi czynnikami ryzyka ocenianymi ilościowo u dzieci z cukrzycą typu 1. Wyniki: Średnia wartość cIMT była większa u pacjentów z cukrzycą (p < 0,01) i wykazywała silny związek ze stężeniem cholesterolu całkowitego [iloraz szans (OR) 4,08; p = 0,016], cholesterolem frakcji LDL (OR 2,77; p = 0,037), czasem trwania choroby (OR 1,87; p = 0,007) i dodatnim wywiadem rodzinnym (krewni pierwszego i drugiego stopnia) w kierunku cukrzycy i wczesnego występowania chorób układu krążenia (zawału serca i/lub udaru mózgu przed 60. rokiem życia) (OR 6,8; p = 0,007). Wnioski: Stwierdzono znamiennie podwyższoną wartość cIMT u pacjentów z cukrzycą w porównaniu ze zdrowymi osobnikami z grupy kontrolnej. Czynniki ryzyka rozwoju miażdżycy obejmowały podwyższone stężenie cholesterolu całkowitego i cholesterolu frakcji LDL, podwyższone skurczowe ciśnienie tętnicze, dodatni wywiad rodzinny w kierunku cukrzycy i wczesnego występowania chorób układu krążenia oraz dłuższy czas trwania cukrzycy. Pomimo udokumentowanego wzmożenia stresu oksydacyjnego nie udało się ustalić korelacji pomiędzy parametrami stresu oksydacyjnego a wartościami cIMT. (Endokrynol Pol 2012; 63 (6): 414&#8211;419

New methodology for monitoring and prevention of rotating parts failures

Rotacioni delovi su vrlo rasprostranjeni u mašinskim sklopovima i sistemima i obavljaju vrlo širok spektar funkcija u gotovo svim industrijskim granama. Nepredviđeni i momentalni prestanak obavljanja osnovne funkcije rotacionih delova - prenošenje rotacionog kretanja, uglavnom kao rezultat velikih inercijalnih sila, ima za posledicu pojavu havarijskih oštećenja često praćenih kompletnim razaranjem pojedinih delova ili celog mašinskog sklopa. Značaj prevencije havarije rotacionih delova se ne ogleda samo kroz sprečavanje velikih šteta, već i kroz obezbeđenje sigurnosti osoblja u pogonu. Stoga je definisanje adekvatne nove metodologije za uspešno praćenje ponašanja i prevenciju havarije rotacionih delova od izuzetnog značaja sa aspekta preventivnog inžinjeringa.Rotating parts are very widely used as a part of mechanical systems in different industries to perform a large number of functions. Unexpected and instantaneous interruption in performing the main function of rotating part i.e. transmission of rotating movement very often caused catastrophic failures of particular parts or complete mechanical systems mainly due to inertial forces. Great importance in prevention of rotating parts failures is associated not only with suppressing the injuries, but also with assuring the safety of people. Thus, to establish the adequate methodology for monitoring and prevention of rotating parts failures it is of great importance to define the optimal preventive maintenance and engineering. In this paper the chronological classification of flaws of parts which were built-in mechanical rotation-based systems was presented. New methodology for monitoring and failure prevention of rotating parts was presented through the examples of shaft, as a part which was usually possible to repair, and bearing, as a part which was not possible to repair. In addition, this paper elucidates some possible additional influences which contribute to operating stability of rotation-based systems, and which were not covered by common operating indicators, as well as some measures for prevention of severe failures

New methodology for monitoring and prevention of rotating parts failures

Rotacioni delovi su vrlo rasprostranjeni u mašinskim sklopovima i sistemima i obavljaju vrlo širok spektar funkcija u gotovo svim industrijskim granama. Nepredviđeni i momentalni prestanak obavljanja osnovne funkcije rotacionih delova - prenošenje rotacionog kretanja, uglavnom kao rezultat velikih inercijalnih sila, ima za posledicu pojavu havarijskih oštećenja često praćenih kompletnim razaranjem pojedinih delova ili celog mašinskog sklopa. Značaj prevencije havarije rotacionih delova se ne ogleda samo kroz sprečavanje velikih šteta, već i kroz obezbeđenje sigurnosti osoblja u pogonu. Stoga je definisanje adekvatne nove metodologije za uspešno praćenje ponašanja i prevenciju havarije rotacionih delova od izuzetnog značaja sa aspekta preventivnog inžinjeringa.Rotating parts are very widely used as a part of mechanical systems in different industries to perform a large number of functions. Unexpected and instantaneous interruption in performing the main function of rotating part i.e. transmission of rotating movement very often caused catastrophic failures of particular parts or complete mechanical systems mainly due to inertial forces. Great importance in prevention of rotating parts failures is associated not only with suppressing the injuries, but also with assuring the safety of people. Thus, to establish the adequate methodology for monitoring and prevention of rotating parts failures it is of great importance to define the optimal preventive maintenance and engineering. In this paper the chronological classification of flaws of parts which were built-in mechanical rotation-based systems was presented. New methodology for monitoring and failure prevention of rotating parts was presented through the examples of shaft, as a part which was usually possible to repair, and bearing, as a part which was not possible to repair. In addition, this paper elucidates some possible additional influences which contribute to operating stability of rotation-based systems, and which were not covered by common operating indicators, as well as some measures for prevention of severe failures

The concentration of tumor necrosis factor alpha in periapical lesions

Introduction. The balance between proinflammatory and anti-inflammatory cytokines plays an important role in the pathogenesis of chronic periapical lesions. The aim of this study was to determine the concentration of TNF-α in tissue homogenates of periapical lesions and analyze its levels in relation to the symptomatology and the size of lesions. Materials and Methods. 93 samples of chronic periapical lesions were obtained after extraction of teeth. Samples were classified according to the clinical presentation as symptomatic and asymptomatic, and according to the size as large and small. The concentration of TNF-α was analyzed using ELISA. Results. The results showed increased production of TNF-α in symptomatic lesions compared to asymptomatic. Higher concentration of TNF-α was demonstrated in large lesions compared to small. Large symptomatic lesions showed greater concentration of TNF-α compared to small symptomatic lesions, while bigger asymptomatic lesions demonstrated higher amount of the cytokines compared to small asymptomatic lesions. Conclusion. Higher concentration of TNF-α in large symptomatic lesions indicates that TNF-α is an important factor responsible for the progression of lesions