Jelena Živković, Zoran Zeković, Ibrahim Mujić, Dejan Gođevac, Miloš Mojović, Aida Mujić, Ivan Spasojević,
Tópico(s): Antioxidant Activity and Oxidative Stress
2009 - Springer Science+Business Media | Food Biophysics
Jelena Živković, Zoran Zeković, Ibrahim Mujić, Senka Vidović, Dragoljub Cvetković, Žika Lepojević, Goran M. Nikolić, Nataša Trutić,
The superoxide radical scavenging and antimicrobial activity were examined of sweet chestnuts: seeds, peeled chestnut, brown seed coat, leaves, catkin, spiny burs, and chestnut bark as well as of Lovran's marrone leaves and grafted Italian marrone cultivar. Parts of chestnut were extracted under the same conditions with 50% ethanol as extractant and afterwards the dry extracts of the examined samples were obtained. The total phenolics and flavonoids contents were determined using standard spectrophotometrical ...
Tópico(s): Phytochemicals and Antioxidant Activities
2010 - Czech Academy of Agricultural Sciences | Czech Journal of Food Sciences
Divna M. Bajić, Jovan Jovanović, Emila M. Živković, Zoran P. Višak, Slobodan P. Šerbanović, Mirjana Lj. Kijevčanin,
Viscosities of four binary mixtures: pyridine + PEG200, pyridine + PEG400, nicotine + PEG200 and nicotine + PEG400 have been measured in temperature range 288.15–333.15 K with temperature step of 5 K and at the atmospheric pressure. Viscosity deviations and excess molar Gibbs energies of activation of viscous flow for the selected binary systems were calculated from the experimental data and fitted to the Redlich–Kister polynomial equation. In addition, UNIFAC–VISCO and ASOG–VISCO models were used to predict ...
Tópico(s): Phase Equilibria and Thermodynamics
2012 - Elsevier BV | Fluid Phase Equilibria
Lj. Živković, Zoran S. Nikolić, S. Bošković, Milena Miljković,
Si3N4–TiN ceramics sintered with Y2O3 and Y2O3+Al2O3 as sintering aids and various content of TiN (0–50 wt.%) were investigated regarding their microstructural and electrical properties. Electroconductive composites were obtained with TiN content higher than 20 vol.%. Computer simulation of conductivity versus concentration of TiN has been done in respect of different models. The influence of dimensionality and type of conductive network on the critical exponent s in the power law, which describes ...
Tópico(s): Thermal properties of materials
2004 - Elsevier BV | Journal of Alloys and Compounds
Petar Stojanov, D Velimirović, VLADIMIR HRNJAK, S. Pavlović, Mirjana Živković, ZORAN DJORDJEVIĆ,
Endocardial pacing system implantation has been performed in 15 children of mean age 37 months (ranging from 1 day to 89 months). Endocardial lead fixation was performed by means of slowly resorbable suture (Dexon) to allow spontaneous lead migration as the child grows. During a mean follow-up period of 61 months (range 17-108 months), none of the patients needed reintervention for correcting the lead length to allow growth.
Tópico(s): Voice and Speech Disorders
1998 - Wiley | Pacing and Clinical Electrophysiology
Kristina Gopčević, Slavica Grujić, Jelena Arsenijević, Ivanka Karadžić, Lidija Izrael-Živković, Zoran Maksimović,
Tópico(s): Phytochemistry and Biological Activities
2019 - Springer Science+Business Media | Plant Foods for Human Nutrition
Uroš Radosavljević, Aleksandra Đorđević, Kseniјa Lalović, Jelena Živković, Zoran Đukanović,
Using heritage as a cultural artifact in city development is not new, but little has been explored about how urban heritage can be utilized as new generative value and a new planning instrument for the revival of cities. The purpose of this paper is to show the creative and the generative use of urban heritage, both for the extension of cultural and tourist offer of the city and for the improvement of the quality of life in physical, social and economic terms for the community. The case study method ...
Tópico(s): 3D Surveying and Cultural Heritage
2019 - Multidisciplinary Digital Publishing Institute | Sustainability
Stojan M. Živković, Zoran Krstić, Dragan Vukanić,
Tópico(s): Stoma care and complications
1991 - Springer Science+Business Media | Pediatric Surgery International
Zorica Živković, Zoran Vukašinović, Sofija Cerović, Suzana Radulovič, Snežana Živanović, E Panic, Mila Hadnadjev, Omer Adžović,
Tópico(s): Respiratory and Cough-Related Research
2010 - Springer Science+Business Media | World Journal of Pediatrics
... with Ivana Dragićević, Nick Bostrom, Mark A. Walker, Zoran Živković, Huw Price, Ma[sbreve]an Bogdanovski, Zoran Knežević, Slobodan Popović, Ken D. Olum, Aleksander B. ...
Tópico(s): Solar and Space Plasma Dynamics
2004 - Taylor & Francis | Astronomical and Astrophysical Transactions
Raša Mladenović, Andrijana Cvetković, Brankica Martinović, Kristina Mladenović, Milan Živković, Zoran Arsic, Sasa Mladenovic, Tanja Luković, Dragana Daković,
Besides classical and electrical toothbrushes market offers tooth brushes that can be chewed, like chewing gums. The aim of this study was to show the effectiveness of chewable toothbrush versus a conventional brush in the students' population.The prospective study included 346 students. For this research, we used a e-questionnaire for "smart" phones, that students completed outside the dental office. Respondents are divided into two groups: control group used conventional toothbrushes, respondents ...
Tópico(s): Dental Health and Care Utilization
2019 - BioMed Central | BMC Oral Health
M. LJ. MIHAILOVIC, L. Živković, Zoran Maksimović, Dejan Jeremić, Živorad Čeković, R. Matić,
Tópico(s): Analytical Chemistry and Chromatography
1967 - Elsevier BV | Tetrahedron
Anđela Đošić, Danijela Živković, Zoran Milanović, Mladen Živković, Ljiljana Bjelaković, Marija Bratić, Saša Pantelić,
The process of aging leads to changes in functional abilities, fitness levels, level of physical activity, and body mass index (BMI), all of which causes changes in the quality of life. The current study aims to determine the association between the level of physical activity (PA) and BMI, and quality of life (QoL) among elderly women. The total sample numbered 156 women, with an average age of 67.7 ± 5.6 years. To determine the level of physical activity, the self-reported International Physical Activity ...
Tópico(s): Health disparities and outcomes
2021 - Frontiers Media | Frontiers in Psychology
Olaf Booij, Zoran Živković, Ben Kröse,
Loop closing in vision based SLAM applications is a difficult task. Comparing new image data with all previously acquired image data is practically impossible because of the high computational costs. Most approaches therefore compare new data with only a subset of the old data, for example by sampling the data over time or over space by using a position estimate. In this paper, we propose a more natural approach, which dynamically determines a subset of images that best describes the complete image ...
Tópico(s): Robotic Path Planning Algorithms
2009 - Elsevier BV | Robotics and Autonomous Systems
Zoran Živković, Ali Taylan Cemgil, Ben Kröse,
A framework for real-time tracking of complex non-rigid objects is presented. The object shape is approximated by an ellipse and its appearance by histogram based features derived from local image properties. An efficient search procedure is used to find the image region with a histogram most similar to the histogram of the tracked object. The procedure is a natural extension of the mean-shift procedure with Gaussian kernel which allows handling the scale and orientation changes of the object. The ...
Tópico(s): Gaussian Processes and Bayesian Inference
2009 - Elsevier BV | Computer Vision and Image Understanding
Zoran Živković, Olaf Booij, Ben Kröse, Elin Anna Topp, Henrik I. Christensen,
An annotated data set is presented meant to help researchers in developing, evaluating, and comparing various approaches in robotics for building space representations appropriate for communicating with humans. The data consist of omnidirectional images, laser range scans, sonar readings, and robot odometry. A set of base-level human spatial concepts is used to annotate the data.
Tópico(s): Robotics and Automated Systems
2008 - Institute of Electrical and Electronics Engineers | IEEE Transactions on Robotics
Olaf Booij, B. Terwijn, Zoran Živković, Ben Kröse,
Vision systems are used more and more in 'personal' robots interacting with humans, since semantic information about objects and places can be derived from the rich sensory information. Visual information is also used for building appearance based topological maps, which can be used for localization. In this paper we describe a system capable of using this appearance based topological map for navigation. The system is made robust by using the epipolar geometry and a planar floor constraint in computing ...
Tópico(s): Advanced Image and Video Retrieval Techniques
2007 - Institute of Electrical and Electronics Engineers | Proceedings - IEEE International Conference on Robotics and Automation/Proceedings
Zoran Živković, Olaf Booij, Ben Kröse,
Tópico(s): Image Retrieval and Classification Techniques
2006 - Elsevier BV | Robotics and Autonomous Systems
Zoran Živković, Ferdinand van der Heijden,
We analyze the computer vision task of pixel-level background subtraction. We present recursive equations that are used to constantly update the parameters of a Gaussian mixture model and to simultaneously select the appropriate number of components for each pixel. We also present a simple non-parametric adaptive density estimation method. The two methods are compared with each other and with some previously proposed algorithms.
Tópico(s): Remote-Sensing Image Classification
2006 - Elsevier BV | Pattern Recognition Letters
Zoran Živković, Ferdinand van der Heijden,
The problem considered in this paper is how to select the feature points (in practice, small image patches are used) in an image from an image sequence, such that they can be tracked adequately further through the sequence. Usually, the tracking is performed by some sort of local search method looking for a similar patch in the next image in the sequence. Therefore, it would be useful if we could estimate "the size of the convergence region" for each image patch. There is a smaller chance of error ...
Tópico(s): Robotics and Sensor-Based Localization
2004 - Springer Science+Business Media | Pattern Analysis and Applications
Zoran Živković, Ferdinand van der Heijden,
There are two open problems when finite mixture densities are used to model multivariate data: the selection of the number of components and the initialization. In this paper, we propose an online (recursive) algorithm that estimates the parameters of the mixture and that simultaneously selects the number of components. The new algorithm starts with a large number of randomly initialized components. A prior is used as a bias for maximally structured models. A stochastic approximation recursive learning ...
Tópico(s): Machine Learning and Algorithms
2004 - IEEE Computer Society | IEEE Transactions on Pattern Analysis and Machine Intelligence
Mirjana Mitrović, Nikica Sabljić, Zorica Cvetković, Nikola Pantić, Aleksandra Zivkovic Dakic, Zoran Bukumirić, Vesna Libek, Nebojša Savić, Branislava Milenković, Marijana Virijević, Violeta Vučinić, Ivana Milošević, Zlatko Pravdić, Nada Suvajdžić, Jawed Fareed, Darko Antić,
We evaluated coagulation abnormalities via traditional tests and rotational thromboelastometry (ROTEM) in a group of 94 patients with confirmed SARS-CoV-2 infection and different severity of pneumonia (34 moderate, 25 severe, 35 critical) with the hypothesis that ROTEM parameters differed by coronavirus disease 2019 (COVID-19) severity. Shorter than normal clotting time (CT) and higher than normal maximum clot firmness (MCF) in extrinsic rotational thromboelastometry (EXTEM) and fibrinogen rotational ...
Tópico(s): Climate Change and Health Impacts
2021 - Informa | Platelets
Tanja Djekic, Zoran Živković, A VANDERHAM, A DEHAAN,
Homogeneous catalysts are complex compounds that are always in equilibrium with their free metal, free ligand and other forms of complexes. The ratios between different species are defined by the stability constants, which are influenced by different parameters such as the type of metal, ligand, counter ion or solvent. The main goal of this paper is the determination of the stability constants for a range of different homogeneous catalyst complexes and therefore the concentration of each species ...
Tópico(s): Analytical Chemistry and Chromatography
2006 - Elsevier BV | Applied Catalysis A General
Barry de Bruin, Zoran Živković, Henk Corporaal,
We introduce an Artificial Neural Network (ANN) quantization methodology for platforms without wide accumulation registers. This enables fixed-point model deployment on embedded compute platforms that are not specifically designed for large kernel computations (i.e. accumulator-constrained processors). We formulate the quantization problem as a function of accumulator size, and aim to maximize the model accuracy by maximizing bit width of input data and weights. To reduce the number of configurations ...
Tópico(s): Image Enhancement Techniques
2019 - Elsevier BV | Microprocessors and Microsystems
Robots are rapidly evolving from factory workhorses to robot-companions. The future of robots, as our companions, is highly dependent on their abilities to understand, interpret and represent the environment in an efficient and consistent fashion, in a way that is comprehensible to humans. This paper is oriented in this direction. It suggests a hierarchical probabilistic representation of space that is based on objects. A global topological representation of places with object graphs serving as ...
Tópico(s): Image Retrieval and Classification Techniques
2007 - Elsevier BV | Robotics and Autonomous Systems
We describe how to build a VIDEOPLACE-like vision-driven user interface using “optical-flow” measurements. The optical-flow denotes the estimated movement of an image patch between two consecutive frames from a video sequence. Similar framework is used in a number of commercial vision-driven interactive computer games but the motion of the users is detected by examining the difference between two consecutive frames. The optical-flow presents a natural extension. We show here how the optical-flow ...
Tópico(s): Advanced Vision and Imaging
2004 - Springer Science+Business Media | Lecture notes in computer science
Jelena Živković, Tatjana Ćebović, Zoran Maksimović,
Abstract The aim of the present study was to examine the antioxidant activity of three Veronica species (Plantaginaceae). The antioxidant potential of various extracts obtained from aerial flowering parts was evaluated by DPPH-free (1,1-diphenyl-2-picrylhydrazyl-free) radical scavenging activity and ferric-reducing antioxidant power assays. Considerable antioxidant activity was observed in the plant samples (FRAP values ranged from 0.97 to 4.85 mmol Fe2+/g, and DPPH IC50 values from 12.58 to 66.34 ...
Tópico(s): Phytochemicals and Antioxidant Activities
2012 - De Gruyter Open | Open Life Sciences
Sanja Srzentić Dražilov, Vesna Spasovski, Duško Spasovski, Zorica Živković, Dragana Matanović, Zoran Baščarević, Zorica Terzić-Šupić, Maja Stojiljković, Teodora Karan-Djurašević, Biljana Stanković, Sonja Pavlović, Gordana Nikčević, Zoran Vukašinović,
Introduction. Perthes disease is idiopathic avascular osteonecrosis of the hip in children, with unknown etiology. Inflammation is present during development of Perthes disease and it is known that this process influences bone remodeling. Objective. Since genetic studies related to inflammation have not been performed in Perthes disease so far, the aim of this study was to analyze the association of frequencies of genetic variants of immune response genes, toll-like receptor 4 (TLR4) and interleukin- ...
Tópico(s): Cancer-related molecular mechanisms research
2014 - Serbian Medical Society | Srpski arhiv za celokupno lekarstvo
Ivan Jovanović, Maja Živković, Mirjana Kostić, Zoran Krstić, Tamara Djurić, Ivana Kolić, Dragan Alavantić, Aleksandra Stanković,
The genetic cause of most congenital anomalies of the kidney and urinary tract (CAKUT) cases remains unknown, therefore the novel approaches in searching for the common disease denominators are required. miRs regulate gene expression in humans and therefore have potentially therapeutic and biomarker properties. No studies thus far have attempted to explore the miRs in human CAKUT. We applied a new strategy to identify most specific miRs associated with CAKUT, in pediatric patients. Data from the ...
Tópico(s): Energy and Environment Impacts
2016 - BioMed Central | Journal of Translational Medicine
Berta Barta Holló, József Magyari, Vukosava Živković-Radovanović, Gordana Vučković, Zoran D. Tomić, Imre Miklós Szilágyi, György Pokol, Katalin Mészáros Szécsényi,
Four new complex compounds of bis(phthalazine-1-hydrazone)-2,6-diacetylpyridine (Hz2DAP) ligand with NiII, CoIII, CuII and ZnII metal centres were synthesised and characterised by single-crystal X-ray diffraction and IR spectral data. The antimicrobial activity of Hz2DAP and the obtained complexes [Co(Hz2DAP-H)Cl2]·MeOH, [Ni(Hz2DAP-H)]Cl·MeOH, [Cu(Hz2DAP-H)Cl] and [Zn(Hz2DAP-2H)]·H2O were tested in vitro against selected Gram(−) and Gram(+) bacterial strains and fungi. The antimicrobial activity of the ...
Tópico(s): Crystal structures of chemical compounds
2014 - Elsevier BV | Polyhedron