A NEW RECORD FOR THEOPHYLEA SUBCYLINDRICOLLIS HLADIL, 1988 (COLEOPTERA: CERAMBYCIDAE) IN SERBIA

During field research in 2011 in Banat and Bačka only one male of Theophilea subcylindricollis Hladil, 1988 was found in a field northeast of Lake Palić. This is the third record of it in our country, with one of the two previous recorded sites destroyed by a building construction. This paper gives an overview of the factors threatening this strictly protected species in Serbia

Vibration and Temperature Measurement Based Indicator of Journal Bearing Malfunction

This paper aims to present the development and implementation of the new malfunction indicator in journal bearings, based on vibrational and thermal records, called DFJB-Defect Factor Journal Bearing. Briefly, the indicator contains the specifically processed information about the bearing vibrations and temperature, on the basis of which the DFJB is calculated using fuzzy logic, and thus the state of the journal bearing may be determined. It should be pointed out that the DFJB is developed in a manner that besides the temperature and the total number of absolute vibrations, it may also integrate following parameters of monitoring: the parameters of rotating vibrations, vibrations spectrum, the thickness of oil film in the journal bearing, the intensity of the ultrasound emission of the bearing etc. These parameters may in certain cases offer more reliable malfunction identification. Experimental investigations conducted in this work, on real machine equipment and in real exploitation conditions, have shown this method to be reliable in the identification of malfunctions in journal bearings. As a result of implementation of DFJB, the time necessary to collect measuring data is significantly shortened, whereas the diagnosis procedure for journal bearings is highly simplified. This is particularly important in complex technical systems with a vast number of measuring points, which often result in the overload of the operator

Can contrast enhanced ultrasound replace computed tomography angiography in endoleak surveillance in post-EVAR patients? – a literature review

Cilj: Kompjutorizirana tomografska angiografija (CTA) zlatni je standard za otkrivanje endoleaka nakon endovaskularnog liječenja aorte (EVAR). Cilj je ovog rada utvrditi može li kontrastni ultrazvuk (CEUS) zamijeniti CTA u dijagnostici endoleaka nakon EVAR-a. Materijali i metode: Pregled literature na engleskom jeziku proveden je u bazama podataka: PubMed/MEDLINE, ScienceDirect, Google Scholar. Ključne riječi bile su: “Computed tomography angiography”, “Contrast enhanced ultrasound”, “Endovascular aneurysm repair”, “Endoleak”. Studije koje su odgovarale kriterijima uključivanja recenzirane su u cijelosti te je odabrano 39 studija. Rezultati: Pacijenti su u analiziranim studijama najvećim dijelom bili muškarci (86 %). Medijan dobi iznosio je 74 godine. Endoleak nakon EVAR-a promatran je u infrarenalnih (79 %), jukstarenalnih (17 %) i suprarenalnih aneurizama (4 %). Stopa endoleaka kretala se između 3 i 52 %. Najčešći endoleak bio je po tipu II te se u 15 % slučajeva javljao unutar prvih šest mjeseci, odnosno u manje od 10 % slučajeva unutar dvije godine nakon EVAR-a. Za sve tipove endoleaka CEUS je pokazao uravnoteženu osjetljivost, specifičnost i područje ispod krivulje od 94 %, 88 % i 96 %. U odnosu na CTA, CEUS ima veću osjetljivost (94/83 %), ali lošiju specifičnost (94,8/99 %). Specifično za tip II endoleaka, CEUS je imao veću stopu detekcije (36,88/20,88 %). Visoka osjetljivost (97 %) i specifičnost (100 %) obilježje su CEUS-a u prikazu endoleaka tipa I i III, bez prednosti u odnosu na CTA. Zaključci: CEUS je slikovna metoda ravnopravna CTA u probiru pacijenata za endoleak nakon EVAR-a. CEUS ne može u potpunosti nadomjestiti CTA, no sigurna je i efikasna alternativa za korištenje u pacijenata bez CTA komplikacija nakon jednogodišnjeg kontrolnog intervala.Aim: Computed tomography angiography (CTA) is the mainstay in endoleak detection after endovascular aneurysm repair (EVAR). The objective of this review is to determine if contrast enhanced ultrasound (CEUS) is able to replace CTA in monitoring endoleaks in patients after EVAR. Materials and methods: The literature search of Englishlanguage articles was conducted in PubMed/MEDLINE, ScienceDirect, Google Scholar. The used keywords included: “Computed tomography angiography”, “Contrast enhanced ultrasound”, “Endovascular aneurysm repair”, “Endoleak”. Studies appearing to meet inclusion criteria were reviewed in full and 39 studies were included. Results: In analysed studies, patients were predominantly men (86%) and median age was 74 years. Endoleak after EVAR was followed in infrarenal (79%), juxtarenal (17%) and suprarenal aneurysms (4%). Endoleak detection rate was 3-52%. Type II endoleaks were the most frequently encountered – in 15% of cases during the first six months and in less than 10% of cases during the first two years after EVAR. In diagnosing all endoleaks, CEUS demonstrated sensitivity, specificity, and AUC of 94%, 88%, 96%, respectively. Compared to CTA, CEUS possesses higher sensitivity (94/83%), but lesser specificity (94.8/99%). Particularly in type II endoleak evaluation, CEUS provided higher detection rates (36.88/20.88%). Regarding type I and type III endoleaks, CEUS demonstrated high sensitivity (97%) and specificity (100%), but without superiority over CTA. Conclusions: CEUS is an imaging technique equivalent to CTA in screening for post-EVAR endoleaks. CTA cannot be entirely replaced by CEUS; however, it is safe and effective alternative method to use after one year of negative CTA exams

New records and noteworthy data of plants, algae and fungi in SE Europe and adjacent regions, 14

This paper presents new records and noteworthy data on the following taxa in SE Europe and adjacent regions: diatom algae Cyclostephanos invisitatus, Cyclotella meduanae, and Stephanodiscus lacustris, mycorrhizal fungi Alessioporus ichnusanus and Amanita mairei, saprotrophic fungi Diaporthe oncostoma, Stropharia albonitens and Pseudomassaria chondrospora, lichenised fungus Acrocordia subglobosa, stonewort Chara connivens, mosses Buxbaumia viridis, Tortella fasciculata and Tortula protobryoides, monocots Epipactis pontica Gymnadenia frivaldii, and Orchis italica and dicots Callitriche brutia, Callitriche platycarpa and Epilobium nutans are given within SE Europe and adjacent regions

New records and noteworthy data of plants, algae and fungi in SE Europe and adjacent regions, 15

This paper presents new records and noteworthy data on the following taxa in SE Europe and adjacent regions: saprotrophic fungus Geastrum morganii, Guignardia istriaca and Hypoxylon howeanum, mycorrhizal fungus Amanita friabilis and Suillus americanus, xanthophyte Vaucheria frigida, stonewort Chara hispida, liverwort Calypogeia integristipula and Ricciocarpus natans, moss Campylopus introflexus, Dicranum transsylvanicum, Tortella pseudofragilis and Trematodon ambiguus, fern Ophioglossum vulgatum subsp. vulgatum, monocots Epipactis exilis, Epipactis purpurata and Epipogium aphyllum and dicots Callitriche cophocarpa, Cornus sanguinea subsp. hungarica and Viscum album subsp. austriacum are given within SE Europe and adjacent regions

CHALLENGES OF CHINA\u27S FOREIGN EXCHANGE POLICY

Politika menjalniškega tečaja v moderni mednarodni ekonomiji predstavlja pomembno orožje zunanje trgovinske politike svetovnih gospodarskih velesil predvsem v primerih, ko drugi vzvodi monetarne politike pri reševanju tekočega računa in zunanjega trgovinskega primanjkljaja ali presežka niso uspešni. Pri tem se vsaka od držav mednarodnega finančnega ustroja sooča z vprašanjem načina reševanja zunanje trgovinskega ravnovesja od izbire deviznega režima, prepričevanja nasprotnika v spremembo makroekonomske politike, uravnovešenja medsebojnega menjalniškega tečaja do spremembe lastne monetarne in/ali fiskalne politike. Kitajska kot ekonomska velesila pri oblikovanju menjalniškega tečaja do ameriškega dolarja ni izjema. Diplomsko delo predstavlja različne poglede na oblikovanje menjalniškega tečaja kitajske valute do ameriškega dolarja kot svetovne valute in druge makroekonomske ukrepe za reševanje neravnovesij v tekočem računu kot tudi v zunanjetrgovinski bilanci.The exchange rate policy in the modern international economy represents an important weapon of external trade policy of the world\u27s major economic powers especially in cases where other levers of monetary or fiscal policy are not successful in resolving the external trade deficit or surplus. In doing so, each of the countries of the international financial architecture is faced with the question of how to solve the foreign trade balance. Persuasion in change of macroeconomic policy, accept a change in mutual exchange rate or alter in their own monetary and / or fiscal policy are possible basic choices of conduct. China as an economic superpower in the design of the exchange rate against the US dollar is no exception. The thesis presents different views on the policy of the exchange rate of the Renminbi against the US dollar as a global currency beside other macroeconomic measures to settle current account and trade imbalances

Mathematical model for temperature change of a journal bearing

In this work, a representative mathematical model has been developed, which reliably describes the heating and cooling of a journal bearing as a result of its malfunctioning, and the model has been further confirmed on a test bench. The bearing model was validated by using analytical modeling methods, i. e. the experimental results were compared to the data obtained by analytical calculations. The regression and variance analysis techniques were applied to process the recorded data, to test the mathematical model and to define mathematical functions for the heating/cooling of the journal bearing. This investigation shows that a representative model may reliably indicate the change in the thermal field, which may be a consequence of journal bearing damage

Procena uticaja na životnu sredinu u okviru komasacije zemljišta

Land consolidation (LC) is an important tool for the improvement of agriculture and rural development, which also includes environmental issues in most of the countries in Europe. This paper presents the most important results of the environmental impact assessment (EIA) of land consolidation, conducted in the municipality of Vršac through a pilot project based on the EU methodology set within the project: “Strengthening Municipal Land Management in Serbia”, supported by the Deutsche Gesellschaft für Internationale Zusammenarbeit (GIZ) GmbH. During the summer of 2018, field survey was carried out at 90 locations, documenting the natural, semi-natural and man-made landscape elements of ecological or cultural values, assessing their quality and estimating the potential harmful environmental impacts of the land consolidation. The already existing negative impacts of intensive agriculture were also registered, such as abandonment or overgrazing of pastures and meadows, converting grasslands into arable land, soil erosion and habitat fragmentation. Although the area of LC is without natural forest and extremely poor in semi-natural elements of rural landscape, the existing entities were revealed as refuges for protected species. Some of the grassland fragments belonged to protected habitat types. The final categorization of the landscape elements was conducted in three levels. Category I landscape elements had to remain undisturbed; Category II landscape elements could be removed with obligatory ecological compensation, while the Category III landscape elements could be removed without environmental compensation. Recommendations were given pointing out the possibilities for improving the environmental characters of the area by the land consolidation process.U većini zemalja u Evropi komasacija zemljišta (KZ) predstavlja važnu meru za unapređenje poljoprivrede i ruralnog razvoja, uključujući pitanja životne sredine,. U ovom radu predstavljeni su najvažniji rezultati procene uticaja komasacije na životnu sredinu (EIA) u Opštini Vršac kroz pilot projekat zasnovan na metodologiji EU postavljenoj u okviru projekta: “Strengthening Municipal Land Management in Serbia”, uz podršku Deutsche Gesellschaft für Internationale Zusammenarbeit (GIZ) GmbH. Tokom leta 2018. godine sprovedeno je terensko istraživanje prirodnih, poluprirodnih i veštačkih elemenata predela, ekoloških i kulturnih vrednosti na 90 lokacija. Urađena je procena stanja ovih vrednosti i procena potencijalnih štetnih uticaja komasacije na životnu sredinu. Osmotreni su negativni uticaji intenzivne poljoprivrede, kao što su: napuštanje ili prekomerna ispaša pašnjaka i livada, njihovo pretvaranje u obradivo zemljište, erozija zemljišta i fragmentacija prirodnih staništa. Iako je područje KZ bez prirodne šume i izuzetno siromašno prirodnim elementima ruralnog pejzaža, postojeće celine su otkrivene kao utočišta za zaštićene vrste. Neki od fragmenata travne vegetacije pripadali su zaštićenim tipovima staništa. Konačna kategorizacija elemenata pejzaža sprovedena je u tri nivoa. Elementi predela I kategorije – koji ostaju nenarušeni (ne smeju se uklanjati); II kategorija – elementi pejzaža neutralnog karaktera sa obaveznom ekološkom kompenzacijom; III kategorija – elementi pejzaža koji se uklanjaju bez ekološke naknade. Date su preporuke kojima se ukazuje na mogućnosti za poboljšanje ekoloških karakteristika područja procesom komasacije

Anatomical and micro-morphological analysis of the fruit and vegetative organs of Inula oculus-christi L. in the Pannonian part of Serbia

Inula oculus-christi L. is a perennial plant, 20-60 cm high, growing in south-east Europe, central and southern Russia and some parts of Asia. It belongs to Pontic-Pannonian floristic element. In Pannonian part of Serbia this species is extremely rare, with very few recently confirmed literature and herbarium data. According to the field data for the period from 2013 to 2015, only one population of this species was recorded in Pannonian part of Serbia, on the site of Rimski Šanac, which is threatened by anthropogenic activities. Furthermore, anatomical and micro-morphological features of I. oculus-christi have not been documented so far. Therefore, in order to get better knowledge of the biology this species, as well as on the basis of the abovementioned, its anatomical and micro-morphological characteristics were investigated. Cross sections of the leaf, stem, rhizome and fruit were obtained using cryotechnique procedure by Leica CM 1850 cryostat. Using a light microscopy, detailed descriptions of anatomical characteristics of the analysed organs were given. The scanning electron microscopy revealed specific qualitative features of leaf and fruit that characterize the species. Obtained data may be useful in determination of this species and represent the valuable contribution to its micro-morphological and anatomical differentiation from other congeneric and related species. [Project of the Serbian Ministry of Education, Science and Technological Development, Grant no. 173002

Traumatic dental injuries in Serbian children: Epidemiological study

Introduction. Comprehensive epidemiological data regarding factors associated with traumatic dental injuries are scarce. Objective. The aim of the present study was to assess the frequency and analyze the factors associated with traumatic dental injuries in Serbian children. Methods. Research included children and adolescents with traumatic dental injury aged 0-19 year during the period from 2003 to 2010, in four University Dental Centres in Serbia: Belgrade, Nis, Novi Sad and Kragujevac. Patient history, demographic, clinical and radiographic data were obtained from dental trauma forms. Results. Total of 2,194 patients (748 girls, 1,446 boys) (χ2=222.1; p<0.01) with 3,077 injured teeth in permanent and 953 in primary dentition were observed. Most of patients were aged 7 to 12 years (n=1,191). The most frequent injuries in primary and permanent dentition were dislocations (87.4%) and teeth fractures (50.8%), respectively (χ2=706.1; p<0.01). The most frequent mechanism of injury was fall in children aged 0 to 12 years, while the collisions were most frequent in adolescents (53.9%). The most frequent injuries in adolescents were inflicted outdoor (66.8%), while the injuries in children aged 0 to 3 years occurred at home (68.2%), (χ2=360.8; p<0.01). The most frequent injuries in girls were accidental (48.3%), and in boys these were sport injuries (20.4%) and violence (10.4%) (χ2=79.9; p<0.01). The most frequent cause of injury in children aged 0 to 3 years was accidental (75.6%), while in adolescents it was sport (34.1%) (χ2=1102.7; p<0.01). Conclusion. Dental injuries in preschool children most frequently resulted from fall at home. Schoolchildren most frequently injured teeth outdoor during play. Violence and sport injuries were most frequent cause of injury in adolescents. [Projekat Ministarstva nauke Republike Srbije, br. 172026