Jenny M Frances, Carol D. Morris, Alexandre Arkader, Zarko Nikolic, John H. Healey,
Quality of life measures have neglected to include a critical self-assessment component in pediatric sarcoma patients. Our report shows how children rate their own quality of life and how that varies over time after surgery. Using the Pediatric Outcomes Data Collection Instrument, quality of life data was prospectively collected and combined with a retrospective review of clinical parameters on 43 children with primary bone sarcoma, with an average followup of 3 years. Children reported good yet ...
Tópico(s): Neuroblastoma Research and Treatments
2007 - Lippincott Williams & Wilkins | Clinical Orthopaedics and Related Research
Koichi Ogura, Mohamed A. Yakoub, Alexander B. Christ, Tomohiro Fujiwara, Zarko Nikolic, Patrick J. Boland, John H. Healey,
Abstract Background The SF-36 is widely used to evaluate the health-related quality of life of patients with musculoskeletal tumors. The minimum clinically important difference (MCID) is useful for interpreting changes in functional scores because it defines the smallest change each patient may perceive. Since the MCID is influenced by the population characteristics, MCIDs of the SF-36 should be defined to reflect the specific conditions of orthopaedic oncology patients. Questions/purposes (1) What ...
Tópico(s): Cardiac, Anesthesia and Surgical Outcomes
2020 - Lippincott Williams & Wilkins | Clinical Orthopaedics and Related Research
Koichi Ogura, Meredith Bartelstein, Mohamed A. Yakoub, Zarko Nikolic, Patrick J. Boland, John H. Healey,
The SF-36 is widely used to evaluate the health-related quality of life (HRQoL) of patients with musculoskeletal tumors. Instead of typical methods, calculating the SF-36 Global Score has recently become an increasingly common reporting approach. However, numerical changes lack clear clinical relevance. The minimal clinically important difference (MCID) is useful for interpreting changes in functional scores by defining the smallest change patients may perceive as clinically meaningful. The aim of ...
Tópico(s): Knee injuries and reconstruction techniques
2020 - Wiley | Journal of Orthopaedic Research®
Žarko Mitić, Goran Nikolić, Milorad Cakić, Pavle Premović, Lj. Ilić,
Pullulan is a water-soluble, extracellular neutral polysaccharide with a linear flexible chain of α-(1 → 6)-linked maltotriose units, the structure of which is intermediate between pullulan and amylose structures because of the co-existence of both α-(1 → 6) and α-(1 → 4)-glycosidic linkages in single compounds. In alkali solutions Cu(II) ion forms complexes with reduced low-molar pullulan (RLMP). The metal content and the solution composition depends on pH. The complexing process begins in a weak alkali ...
Tópico(s): biodegradable polymer synthesis and properties
2009 - Elsevier BV | Journal of Molecular Structure
Milorad Cakić, Žarko Mitić, Goran Nikolić, Ljubomir Ilić, Goran M. Nikolić,
The optimization of the reaction conditions (pH, T , t ) to obtain stable copper(II) ion complexes with dextran derivatives were investigated in this paper. A complete synthesis of stable aqueous complexes can be realized with reduced low-molar polysaccharides, at an average molar mass 5000 g mol –1 and pH 7.5–8. Fourier-transform IR spectra of polysaccharide dextran and its compounds with copper(II) ion, recorded at room temperature, were analyzed in order to obtain the information about the structure ...
Tópico(s): Thermal and Kinetic Analysis
2008 - Hindawi Publishing Corporation | Spectroscopy An International Journal
Žarko Mitić, Goran Nikolić, Milorad Cakić, Ružica Nikolić, Lj. Ilić,
Tópico(s): Collagen: Extraction and Characterization
2007 - Pleiades Publishing | Russian Journal of Physical Chemistry A
Nenad Filipović, Mirko Rosic, Irena Tanasković, Žarko Milošević, Dalibor Nikolić, Nebojša Zdravković, Aleksandar Peulić, Miloš Kojić, Dimitrios I. Fotiadis, Oberdan Parodi,
Atherosclerosis is a progressive disease characterized by the accumulation of lipids and fibrous elements in arteries. It is characterized by dysfunction of endothelium and vasculitis, and accumulation of lipid, cholesterol, and cell elements inside blood vessel wall. In this study, a continuum-based approach for plaque formation and development in 3-D is presented. The blood flow is simulated by the 3-D Navier-Stokes equations, together with the continuity equation while low-density lipoprotein ( ...
Tópico(s): Cerebrovascular and Carotid Artery Diseases
2011 - Institute of Electrical and Electronics Engineers | IEEE Transactions on Information Technology in Biomedicine
Žarko Ćojbašić, Vlastimir Nikolić, Ivan Ćirić, Ljubica R Ćojbašić,
In this paper modelling and control approaches for fluidized bed combustion process have been considered, that are based on the use of computational intelligence. Proposed adaptive neuro-fuzzy-genetic modeling and intelligent control strategies provide for efficient combining of available expert knowledge with experimental data. Firstly, based on the qualitative information on the desulphurization process, models of the SO2 emission in fluidized bed combustion have been developed, which provides ...
Tópico(s): Fault Detection and Control Systems
2011 - Vinča Institute of Nuclear Sciences | Thermal Science
Ivan Ćirić, Žarko Ćojbašić, Vlastimir Nikolić, Predrag Živković, Mladen Tomić,
The subject of this study is to compare different computational intelligence methodologies based on artificial neural networks used for forecasting an air quality parameter - the emission of CO2, in the city of Nis. Firstly, inputs of the CO2 emission estimator are analyzed and their measurement is explained. It is known that the traffic is the single largest emitter of CO2 in Europe. Therefore, a proper treatment of this component of pollution is very important for precise estimation of emission ...
Tópico(s): Air Quality and Health Impacts
2012 - Vinča Institute of Nuclear Sciences | Thermal Science
Oberdan Parodi, Themistoklis Exarchos, Paolo Marraccini, Federico Vozzi, Žarko Milošević, Dalibor Nikolić, Antonis I. Sakellarios, Panagiotis K. Siogkas, Dimitrios I. Fotiadis, Nenad Filipović,
Computational fluid dynamics methods based on in vivo 3-D vessel reconstructions have recently been identified the influence of wall shear stress on endothelial cells as well as on vascular smooth muscle cells, resulting in different events such as flow mediated vasodilatation, atherosclerosis, and vascular remodeling. Development of image-based modeling technologies for simulating patient-specific local blood flows is introducing a novel approach to risk prediction for coronary plaque growth and ...
Tópico(s): Cerebrovascular and Carotid Artery Diseases
2012 - Institute of Electrical and Electronics Engineers | IEEE Transactions on Information Technology in Biomedicine
Shahaboddin Shamshirband, Dalibor Petković, Hadi Saboohi, Nor Badrul Anuar, Irum Inayat, Shatirah Akib, Žarko Ćojbašić, Vlastimir Nikolić, Miss Laiha Mat Kiah, Abdullah Gani,
This article has been retracted: please see Elsevier Policy on Article Withdrawal (http://www.elsevier.com/locate/withdrawalpolicy). This article has been retracted at the request of the Editor-in-Chief, as the article shows significant overlap with the following article published earlier by the same authors: Support vector regression methodology for wind turbine reaction torque prediction with power-split hydrostatic continuous variable transmission Energy, 67, 623–630, 2014 http://dx.doi.org/10. ...
Tópico(s): Wind Energy Research and Development
2014 - Elsevier BV | Energy Conversion and Management
Dalibor Petković, Shahaboddin Shamshirband, Žarko Ćojbašić, Vlastimir Nikolić, Nor Badrul Anuar, Aznul Qalid Md Sabri, Shatirah Akib,
Wind power is generating interest in many countries as a way to produce inexpensive and sustainable electrical power. Building integrated wind turbines (BIWTs) are an interesting option in this respect. BIWTs are low cost renewable sources of energy. Since the power in wind is proportional to the cubic power of the wind velocity approaching the wind turbine, a small amount of wind speed acceleration leads to a large increase in energy output. To augment free wind speed streams, the open area between ...
Tópico(s): Wind Turbine Control Systems
2014 - Elsevier BV | Computers & Fluids
Shahaboddin Shamshirband, Dalibor Petković, Žarko Ćojbašić, Vlastimir Nikolić, Nor Badrul Anuar, Liyana Shuib, Miss Laiha Mat Kiah, Shatirah Akib,
A wind power plant which consists of a group of wind turbines at a specific location is also known as wind farm. To maximize the wind farm net profit, the number of turbines installed in the wind farm should be different in depend on wind farm project investment parameters. In this paper, in order to achieve the maximal net profit of a wind farm, an intelligent optimization scheme based on the adaptive neuro-fuzzy inference system (ANFIS) is applied. As the net profit measures, net present value ( ...
Tópico(s): Wind Turbine Control Systems
2014 - Elsevier BV | Energy Conversion and Management
Shahaboddin Shamshirband, Dalibor Petković, Nor Badrul Anuar, Miss Laiha Mat Kiah, Shatirah Akib, Abdullah Gani, Žarko Ćojbašić, Vlastimir Nikolić,
The wind speed has a huge impact on the wind turbine output energy and safety. Because of this, many control algorithms use a measure of the wind speed to increase performance. Unfortunately, no precise measurement of the effective wind speed is online available from direct measurements, which means that it must be estimated in order to make such control methods applicable in practice. In this paper, a novel algorithm for wind speed estimation in wind-power generation systems is proposed, which ...
Tópico(s): Wind Energy Research and Development
2014 - Elsevier BV | International Journal of Electrical Power & Energy Systems
Žarko Stanisavljević, Boško Nikolić, I. Tartalja, Veljko Milutinović,
Tópico(s): Online and Blended Learning
2013 - Springer Science+Business Media | Multimedia Tools and Applications
Dalibor Petković, Žarko Ćojbašić, Vlastimir Nikolić,
Wind energy has become a large contender of traditional fossil fuel energy, particularly with the successful operation of multi-megawatt sized wind turbines. However, reasonable wind speed is not adequately sustainable everywhere to build an economical wind farm. In wind energy conversion systems, one of the operational problems is the changeability and fluctuation of wind. In most cases, wind speed can vacillate rapidly. Hence, quality of produced energy becomes an important problem in wind energy ...
Tópico(s): Wind Turbine Control Systems
2013 - Elsevier BV | Renewable and Sustainable Energy Reviews
Dalibor Petković, Žarko Ćojbašić, Vlastimir Nikolić, Shahaboddin Shamshirband, Miss Laiha Mat Kiah, Nor Badrul Anuar, Ainuddin Wahid Abdul Wahab,
In recent years the use of renewable energy including wind energy has risen dramatically. Because of the increasing development of wind power production, improvement of the control of wind turbines using classical or intelligent methods is necessary. To optimize the power produced in a wind turbine, the speed of the turbine should vary with the wind speed. Variable-speed operation of wind turbines presents certain advantages over constant-speed operation. In this paper, in order to maintain the ...
Tópico(s): Wind Energy Research and Development
2013 - Elsevier BV | Energy
Milorad Cakić, Žarko Mitić, Goran Nikolić, Ivan Savić, Ivana Savić,
Copper is an essential element in the human organism. Furthermore, copper deficiency is rare; however, the hematologic manifestations associated with copper deficiency, such as anemia, leukopenia, neutropenia, myeloneuropathy and osteoporosis, are well known.The authors present an overview of the various commercially available drugs used in the treatment of copper deficiency. Furthermore, the authors offer a description of copper complexes, as potential pharmaceutically active compounds, that can ...
Tópico(s): Iron Metabolism and Disorders
2013 - Taylor & Francis | Expert Opinion on Drug Discovery
Žarko Gagić, Katarina Nikolić, Branka Ivković, Slavica Filipić, Danica Agbaba,
Vitamin E is group of natural antioxidants comprised of tocopherols and tocotrienols. Structural analogs of vitamin E exhibit selective antiproliferative activity that has been intensively studied over the last decade in various cancer cells (MCF-7, MDA-MB-231, LNCaP, PC-3, A549, K562, Jurkat). 2D- and 3D-QSAR studies were applied on a series of 30 derivatives of tocopherols, tocotrienols and chromane with antiproliferative activity in MCF-7 breast cancer cell line. All molecular structures were ...
Tópico(s): Antioxidant Activity and Oxidative Stress
2015 - Elsevier BV | Journal of the Taiwan Institute of Chemical Engineers
John H. Healey, Zarko Nikolic, Edward A. Athanasian, Patrick J. Boland,
Tópico(s): Childhood Cancer Survivors' Quality of Life
1997 - Springer Science+Business Media | Annals of Surgical Oncology
Koichi Ogura, Mohamed A. Yakoub, Alexander B. Christ, Tomohiro Fujiwara, Zarko Nikolic, Patrick J. Boland, Edward A. Athanasian, John H. Healey,
The DASH (Disabilities of the Arm, Shoulder, and Hand) is a scored questionnaire that is widely used to evaluate the health-related quality of life of patients with upper limb musculoskeletal disorders. However, numerical changes in the measure scores lack clinical significance without meaningful threshold change values of outcome measures that are diagnostically specific. The minimal clinically important difference (MCID) is useful for the interpretation of scores by defining the smallest change ...
Tópico(s): Reconstructive Surgery and Microvascular Techniques
2021 - Elsevier BV | Journal of Shoulder and Elbow Surgery
Goran Nikolić, Milorad Cakić, Zarko Mitic, Ruzica Nikolic, Ljubomir Ilic,
UV-VIS spectrophotometric investigations of Cu(II) complexes with hydroge-nated dextran showed that the complexation of Cu(II)-ions began at pH > 7. The formation of Cu(II) complexes with dextran monomer units was observed at pH 7-12. With further increase in solution pH > 12, the Cu(II)-dextran complex decomposed to Cu(OH)42~-ions and dextran. With increasing solution pH the absorption maximum of complex solutions increased and shifted to shorter wavelength (hypsochromic shift) compared with uncomplexed ...
Tópico(s): Spectroscopy and Chemometric Analyses
2005 - Association of Chemical Engineers of Serbia | Hemijska industrija
Shahaboddin Shamshirband, Dalibor Petković, Amineh Amini, Nor Badrul Anuar, Vlastimir Nikolić, Žarko Ćojbašić, Miss Laiha Mat Kiah, Abdullah Gani,
Nowadays the use of renewable energy including wind energy has risen dramatically. Because of the increasing development of wind power production, improvement of the prediction of wind turbine output energy using classical or intelligent methods is necessary. To optimize the power produced in a wind turbine, speed of the turbine should vary with wind speed. Variable speed operation of wind turbines presents certain advantages over constant speed operation. This paper has investigated power-split ...
Tópico(s): Wind Turbine Control Systems
2014 - Elsevier BV | Energy
Žarko Mitić, Goran M. Nikolić, Milorad Cakić, Goran Nikolić, S. Zivanovic, Sanja Mitić, Stevo Najman,
Complexes of Co(II) ion with reduced low-molar pullulan (RLMP) (Mw 6000 g/mol) were synthesized in aqueous solutions at boiling temperature in the pH range from 7.5 to 13.5. Obtained Co(II)-RLMP complexes, with cobalt content ∼2-8% (AAS), were characterized by UV-Vis spectrophotometry, FTIR spectroscopy (ATR-FTIR, FT-IRIS), MALDI-TOF/TOF MS, and XRD. Tetragonally distorted Oh coordination of Co(II) ions with O ligand atoms in synthesized complexes is suggested based on the spectrophotometric data. No ...
Tópico(s): Plant Surface Properties and Treatments
2018 - Elsevier BV | Carbohydrate Polymers
Danijela Ristić–Durrant, Sorin Grigorescu, Anita Graser, Žarko Ćojbašić, Vesna Nikolić,
A key requirement of assistive robot vision is the robust 3D object reconstruction in complex environments for reliable autonomous object manipulation. In this paper the idea is presen ...
Tópico(s): Advanced Vision and Imaging
2011 - Ștefan cel Mare University of Suceava | Advances in Electrical and Computer Engineering
Žarko Mitić, Goran Nikolić, Milorad Cakić, Ružica Nikolić, Ljubomir Ilić,
Co(II) ion complex compounds were synthesized with reduced dextran (RD) in alkali solutions using CoCl2, 6H2O and isolated in the solid state. UV-VIS spectrophotometric investigations of Co(II) complexes with reduced dextran showed that the complexation of Co(II) ions begins at pH over 7. The formation of Co(II) ion complexes with dextran monomer units was observed at pH 7-13. With increase in solution pH the light absorption maximum of complex solutions shifts to longer wavelengths (bat-hochromic ...
Tópico(s): Inorganic and Organometallic Chemistry
2007 - Association of Chemical Engineers of Serbia | Hemijska industrija
S. Zivanovic, Aleksandar M. Veselinović, Žarko Mitić, Goran M. Nikolić,
UV-Vis spectrophotometry with MCR-ALS analysis was applied to study the influence of Mg( ii ) and Ca( ii ) ions on caffeic acid autoxidation.
Tópico(s): Analytical Chemistry and Chromatography
2018 - Royal Society of Chemistry | New Journal of Chemistry
Žarko Mitić, Milorad Cakić, Goran Nikolić,
Co(II) ion complexes with reduced low-molar dextran (RLMD) derivatives M w = 5000 − 6000 g/mol, their FTIR spectroscopic characterization, as well as the spectra-structure correlation was investigated in this work. The samples of Co(II) ion complexes with RLMD were deuterated (D 2 O, Merck) for 2 h, at room temperature, in vacuum. FTIR spectra as an average of 40 scans were recorded at room temperature in the range 4000 – 400 cm −1 . FTIR investigation of Co(II)–RLMD complexes by D 2 O isotopic exchange proved ...
Tópico(s): Spectroscopy and Chemometric Analyses
2010 - Hindawi Publishing Corporation | Spectroscopy An International Journal
Žarko Stanisavljević, Vladimir Pavlović, Boško Nikolić, Jovan Djordjević,
This paper presents the basic features of a software system developed to support the teaching of digital logic, as well as the experience of using it in the Digital Logic course taught at the School of Electrical Engineering, University of Belgrade, Serbia. The system has been used for several years, both by students for self-learning and laboratory work, and by teachers to automate the assessment and verification of students' work. The system allows users to design and simulate a switching circuit. ...
Tópico(s): Embedded Systems and FPGA Applications
2012 - IEEE Education Society | IEEE Transactions on Education
Ubavka Radivojevic, Gordana Lazovic, Tamara Kravic‐Stevovic, Zarko Puzigaća, F. Canović, R Nikolić, Srboljub Milićević,
Exploring the relation between the age, time since menarche, anthropometric parameters and the growth of the uterus and ovaries in postmenarcheal girls.Cross sectional.Department of Human reproduction at a tertiary pediatric referral center.Eight hundred thirty-five adolescent girls.Postmenarcheal girls were classified according to the regularity of their menstrual cycles in 2 groups (regular and irregular cycles) and compared. Anthropometric measurements and ultrasonographic examination of the pelvis ...
Tópico(s): Ovarian cancer diagnosis and treatment
2014 - Elsevier BV | Journal of Pediatric and Adolescent Gynecology