Control theory for nonlinear fractional dispersive systems

We consider a terminal control problem for processes governed by a nonlinear system of fractional ODEs. In order to show existence of the control, we first consider the linear counterpart of the system and reprove a number of classical theorems in the fractional setting (representation of the solution through the Gramian type matrix, Kalman's principle, equivalence of the controllability and observability). We are then in the position to use a fixed point theorem approach and various techniques from the fractional calculus theory to get the desired result

THE APPLICATION OF FRESHWATER LEECHES IN ECOLOGICAL RESEARCH

Predstavnici podrazreda Hirudinomorpha su često zanemareni prilikom istraživanja slatkovodnih ekosustava. Rezultati provedenih istraživanja ukazuju na njihovu važnost kao bioindikatora kvalitete vode te dobrih pokazatelja promjena u okolišu. Pijavice mogu u svom tkivu akumulirati toksične tvari (npr. poliklorirani bifenili) te i na taj način ukazivati na negativan atropogeni utjecaj na vodena staništa. Prije nego je počela njihova primjena u ekološkim istraživanjima, koristilo ih se, i danas se koriste, u liječenju različitih oboljenja kod čovjeka.Representatives of subclass Hirudinomorpha have often been neglected in numerous freshwater ecosystem research. The results of conducted investigations including leeches indicate their importance as bioindicators of water quality and changes in the environment. Leeches have the ability to accumulate toxic compounds in their tissue (e.g. PCB), thus indicating negative anthropological influence on water habitats. Prior to their application in ecological research, they have been, and are still used, in the treatment of different human health problems

THE APPLICATION OF FRESHWATER LEECHES IN ECOLOGICAL RESEARCH

Predstavnici podrazreda Hirudinomorpha su često zanemareni prilikom istraživanja slatkovodnih ekosustava. Rezultati provedenih istraživanja ukazuju na njihovu važnost kao bioindikatora kvalitete vode te dobrih pokazatelja promjena u okolišu. Pijavice mogu u svom tkivu akumulirati toksične tvari (npr. poliklorirani bifenili) te i na taj način ukazivati na negativan atropogeni utjecaj na vodena staništa. Prije nego je počela njihova primjena u ekološkim istraživanjima, koristilo ih se, i danas se koriste, u liječenju različitih oboljenja kod čovjeka.Representatives of subclass Hirudinomorpha have often been neglected in numerous freshwater ecosystem research. The results of conducted investigations including leeches indicate their importance as bioindicators of water quality and changes in the environment. Leeches have the ability to accumulate toxic compounds in their tissue (e.g. PCB), thus indicating negative anthropological influence on water habitats. Prior to their application in ecological research, they have been, and are still used, in the treatment of different human health problems

Flank wear as a function of cutting time

The paper describes one teaching unit - tool wear, which is studied at laboratory classes in the Metal cutting technology course. Through laboratory classes, students gain practical knowledge. The main goal of this teaching unit is to help students to understand the wear process and to define the parameters that describe the wear process. The most important wear parameter is the width of the flank wear of the tool. By monitoring the changes in the values of this parameter, students can see how the wear process is progressing over time. An end mill was taken as an example. The width of the flank wear was measured at intervals of 5 minutes, at distances of 0.1 mm. Based on the measured values, a diagram of tool flank wear was created. Also, the change in the width of the flank wear depending on the cutting time is shown.Publishe

Effect of egg mass of the white Italian goose on fertilisation, loss of weight during the incubation period, hatchability and gosling quality

The main purpose of the study was to determine the effect of egg mass and egg weight groups (group I eggs under 160 g, group II egg mass 160 g to 180 g and group III eggs over 180 g) on incubation results, loss of egg weight (moist) during incubation, gosling hatchability and the relative share of the gosling in the egg mass. Eggs with mass between 160 g and 180 g (group II) demonstrated the highest fertilisation rate (91.28 %) and the highest hatchability out of the number of incubated eggs (83.14 %), while the eggs from the group I (lighter than 160 g) showed the highest number of gosling hatchability out of the number of fertilised eggs (91.08 %). The lowest embryo mortality was that of the group I (5.17 % and 6.06 %), while the highest is reported for the group III (14.29 % and 16.67 %). The lowest relative loss of egg mass (moist) by day 25 of the incubation period was established for the group I eggs (10.98 %), and the highest for the group III (11.71 %), with a statistically significant (P lt 0.01) difference of -0.73 %. Other differences were not statistically significant (P>0.05). Gosling percentage in the egg mass was significantly higher (P lt 0.001) in the group III of incubated eggs (67.81 %) than in the group II (66.61 %) and the group I (65.24 %)

A preliminary study of the miRNA restitution effect on CNV-induced miRNA downregulation in CAKUT

Background The majority of CAKUT-associated CNVs overlap at least one miRNA gene, thus affecting the cellular levels of the corresponding miRNA. We aimed to investigate the potency of restitution of CNV-affected miRNA levels to remediate the dysregulated expression of target genes involved in kidney physiology and development in vitro. Methods Heterozygous MIR484 knockout HEK293 and homozygous MIR185 knockout HEK293 cell lines were used as models depicting the deletion of the frequently affected miRNA genes by CAKUT-associated CNVs. After treatment with the corresponding miRNA mimics, the levels of the target genes have been compared to the non-targeting control treatment. For both investigated miRNAs, MDM2 and PKD1 were evaluated as common targets, while additional 3 genes were investigated as targets of each individual miRNA (NOTCH3, FIS1 and APAF1 as hsa-miR-484 targets and RHOA, ATF6 and CDC42 as hsa-miR-185-5p targets). Results Restitution of the corresponding miRNA levels in both knockout cell lines has induced a change in the mRNA levels of certain candidate target genes, thus confirming the potential to alleviate the CNV effect on miRNA expression. Intriguingly, HEK293 WT treatment with investigated miRNA mimics has triggered a more pronounced effect, thus suggesting the importance of miRNA interplay in different genomic contexts. Conclusions Dysregulation of multiple mRNA targets mediated by CNV-affected miRNAs could represent the underlying mechanism behind the unresolved CAKUT occurrence and phenotypic variability observed in CAKUT patients. Characterizing miRNAs located in CNVs and their potential to become molecular targets could eventually help in understanding and improving the management of CAKUT

The effects of nonstoichiometry on optical properties of oxide nanopowders

In this paper we illustrate the change of optical properties of mechanically activated wurtzite ZnO powder and laser synthesized anatase TiO2 nanopowder due to the nonstoichiometry caused by mechanical activation and/or laser irradiation in vacuum. Both of the investigated materials are widely used in optoelectronics and the examination of their optical properties under different preparation and environmental conditions is of great practical interest

Characterization of Barium Titanate Ceramic Powders by Raman Spectroscopy

Barium titanate, BaTiO3 ceramic powders were prepared by mechanochemical synthesis and by the Pechini method. A powder mixture of BaO and TiO2 was treated in a planetary ball mill in an air atmosphere for Lip to 1 h, using zirconium oxide vial and zirconium oxide balls as the milling medium. After 60 min BaTiO3 phase was formed. In both ways BaTiO3 ceramics were sintered after 2 h on 1300 degrees C without pre-calcinations step. The heating rate was 10 degrees C min(-1). The formation of phase and crystal structure of BaTiO3 was approved by X-ray diffraction analysis and the Raman spectroscopy. The morphology and microstructure of obtained powders were examined by scanning electron microscopy method. Sharp phase transition from ferroelectric to paraelectric state was observed. The hysteresis loop is very well performed with regular sharp characteristic of ferroelectric materials

Smart Belgrade: Tradition vs. Innovation - New network of drinking fountains: Thirst App [Poster Session]

The Thirst App should offer medical (reminder and control of daily drinking water), cultural and historical aspects (city-level tourist routes, as well as information on historical sites). The routes are named according to the parts of the city it passes. The analysis shows that the drinking fountains are missing in the new part as well as in the central parts of Belgrade. Therefore, a new network of drinking fountains has been made to form a part of a mobile urban furniture in public space - with a large number of users of this application, a drinking fountain emerges from the color-changing tile that supplies new users with filtered water of rainwater or snow

Uloga regionalne anestezije u postoperativnoj analgeziji pedijatrijskih bolesnika

Introduction/Objective Pain is a disturbing experience associated with existing or potential tissue damage, with a sensory, emotional, cognitive, and social component. The aim of this study was to show the efficiency of regional anesthetic techniques in postoperative pain in children. Methods The retrospective cohort study was conducted on a group of 564 pediatric patients during the period from 2013 to 2016. Types of regional anesthesia were classified into the following six groups: caudal, epidural, spinal block, upper limb blocks, lower limb blocks, and truncal nerve block. From statistical methods, we used descriptive statistical methods of absolute and relative numbers, measurements of variability, central tendencies for numerical features, and methods of inferential statistics. We used the ch2 test for the attributive features of observations. Results In relation to the postoperative time when an analgesic was required, a statistically significant difference was observed in the age of children (p = 0.000), disease diagnosis (p = 0.000), type of block (p = 0.000), type of local anesthetic (p = 0.000), and type of anesthesia or sedation preoperatively (p = 0.005). Conclusion Postoperative analgesia was most needed by older children and children who were awake during surgery. Children with injuries and tumors need postoperative analgesia the earliest. The longest postoperative analgesia was recorded in patients who received caudal block. The longest postoperative analgesia can be seen in patients who received levobupivacaine, bupivacaine or levobupivacaine combined with lidocaine to perform the block.Uvod/Cilj Bol predstavlja uznemirujuće iskustvo koje je povezano sa postojećim ili mogućim oštećenjem tkiva, sa senzornom, emocionalnom, kognitivnom i socijalnom komponentom. Cilj ove studije je prikaz efikasnosti tehnika regionalne anestezije na postoperativni bol kod dece. Metode Retrospektivna kohortna studija je sprovedena na grupi od 564 pedijatrijskih bolesnika u periodu od 2013. do 2016. godine. Vrste regionalne anestezije su klasifikovane u šest grupa: kaudalna, epiduralna, spinalna, blokovi gornjih ekstremiteta, donjih ekstremiteta i blok trupa. Od statističkih metoda koristili smo deskriptivne statističke metode apsolutnih i relativnih brojeva za atributivna obeležja posmatranja, mere varijabiliteta, centralne tendencije za numerička obeležja i metode inferencijalne statistike. Izbor testova za numerička obeležja posmatranja zavisiće od raspodele podataka. Za atributivna obeležja posmatranja koristili smo ch2 test. Rezultati U odnosu na postoperativno vreme kada je bio potreban analgetik, statistički značajna razlika uočena je u uzrastu dece (p = 0,000), dijagnozi bolesti (p = 0,000), vrsti bloka (p = 0,000), vrsti korišćenog lokalnog anestetika (p = 0,000), kao i vrsti perioperativne anestezije ili sedacije (p = 0,005). Zaključak Postoperativna analgezija je najpotrebnija starijoj deci i deci koja su bila budna tokom hirurške intervencije. Najranija postoperativna analgezija je potrebna deci sa povredama i tumorima. Najduža postoperativna analgezija je zabeležena kod bolesnika koji su dobili kaudalni blok, kao i bolesnika koji su primili levobupivakain, bupivakain ili levobupivakain u kombinaciji sa bupivakainom za izvođenje bloka