Method of measuring angular position based on a new class ofoptoelectronic sensors

У овој докторској дисертацији извршен је преглед постојећих метода мерења угаоног положаја и дат је предлог нове методе за мерење апсолутног угаоног положаја. Предложена мерна метода заснива се на примени трансформације боје објекта из Декартовог RGB простора боја у неки од цилиндричних, кориснички оријентисаних, простора боја (HSV, HSI, HLS). На бази предложене мерне методе конструисан је сензор апсолутног угаоног положаја који се састоји од три оптичка рефлексиона сензора и штампаног шаблона са сивом скалом. Тачност, поновљивост и резолуција мерења, постигнути приликом тестирања сензора су ±1 °, ±0,3 ° и 0,1 °.U ovoj doktorskoj disertaciji izvršen je pregled postojećih metoda merenja ugaonog položaja i dat je predlog nove metode za merenje apsolutnog ugaonog položaja. Predložena merna metoda zasniva se na primeni transformacije boje objekta iz Dekartovog RGB prostora boja u neki od cilindričnih, korisnički orijentisanih, prostora boja (HSV, HSI, HLS). Na bazi predložene merne metode konstruisan je senzor apsolutnog ugaonog položaja koji se sastoji od tri optička refleksiona senzora i štampanog šablona sa sivom skalom. Tačnost, ponovljivost i rezolucija merenja, postignuti prilikom testiranja senzora su ±1 °, ±0,3 ° i 0,1 °.In this doctoral thesis a review of existing methods for angular position measurement is conducted and a new method for measuring absolute angular position is proposed. The proposed measurement method is based on the use of object color transformation from Cartesian RGB color space to one of the user-oriented cylindrical color space (HSV, HSI, HLS). Оn the basis of the proposed measurement method, absolute angular position sensor consisting of three optical reflective sensors and a grayscale printed pattern is constructed. Accuracy, repeatability and resolution of measurement using proposed sensor were ± 1 °, ± 0.3 ° and 0.1 °

Measurement of 60CO gamma radiation induced attenuation in multimode step-index POF at 530 nm

As optical fibres are used ever more extensively in space applications, nuclear industry, medicine and high-energy physics experiments, it has become essential to investigate the influence of ionizing radiation on their characteristics. In this work, the radiation-induced attenuation at 530 nm is investigated experimentally in step-index multimode polymethyl-methacrylate plastic optical fibres exposed to low dose-rate gamma radiation. Cumulative doses ranged from 50 Gy to 500 Gy. The radiation induced attenuation has been empirically found to obey the power law RIA= aDb, where D is the total radiation dose and a and b are the constants determined by fitting

Monitoring of chlorine by new method based on FOS in water bodies

Fibre optic sensor (FOS) is used to measure the concentration of total chlorine in samples of surface water, swimming pool water and leachate from MSW landfill. FOS represents new original method which is based on the color of the sample for measurement ofanalyteconcentration. Color sensor converts RGB (Red-Green-Blue) color model to HSV (Hue-Saturation-Value) color model. S and V parameters were used for determination of chlorineconcentrations in selected water bodies. H parameter was used for the calculation of wavelength at which applied sensor measures the concentration of total chlorine. Research was carried out to validate the effectiveness and repeatability of the results obtained with FOS and confirms the capability to use sensor in laboratory controlled conditions. Results obtained with FOS are compared with standard analytical methods (UV-Vis spectrophotometer) to confirm the possibility of using FOS as replacement for standard analytical expensive equipment

Efficiency of the interfacial charge transfer complex between TiO2 nanoparticles and caffeic acid against DNA damage in vitro: A combinatorial analysis

The genotoxic and antigenotoxic behavior of the interfacial charge transfer (ICT) complex between nano-sized TiO2 particles and caffeic acid (CA) was studied in in vitro experiments. The formation of the ICT complex is indicated by the appearance of absorption in visible-spectral range. The continual variations method indicated bridging coordination between the ligand, caffeic acid, and the surface Ti atoms, while the stability constant of the ICT complex was found to be 1.5x10(3) mol(-1) L. An agreement between the experimental data and the theoretical results, based on the density functional theory, was found. The ICT complex and its components did not display genotoxicity in the broad concentration range 0.4. 8.0 mg mL(-1) TiO2 at a mole ratio c(TiO2)/c(CA) = 8. On the other hand, post-treatment of damaged DNA by the ICT complex induced antigenotoxic effect at lower concentrations, but at higher concentrations, 5.125-10.250 mg mL(-1) ICT, the ICT complex did not show any beneficial effect on H2O2-induced DNA damaged cells. The experimental data were analyzed using the combinatorial method to determine the effect of component interaction on the genotoxic and antigenotoxic behavior of the ICT complex

Water for all : Proceedings of the 7th international scientific and professional conference Water for all

The 7th International Scientific and Professional Conference Water for all is organized to honour the World Water Day by the Josip Juraj Strossmayer University of Osijek, European Hygienic Engineering & Design Group (EHEDG), Danube Parks, Croatian Food Agency, Croatian Water, Faculty of Food Technology Osijek, Faculty of Agriculture in Osijek, Faculty of Civil Engineering Osijek, Josip Juraj Strossmayer University of Osijek Department of Biology, Josip Juraj Strossmayer University of Osijek Department of Chemistry, Nature Park “Kopački rit”, Osijek- Baranja County, Public Health Institute of the Osijek- Baranja County and „Vodovod-Osijek“ -water supply company in Osijek. The topic of World Water Day 2017 was "Wastewater" emphasizing the importance and influence of wastewater treatments on global environment. The international scientific and professional conference Water for all is a gathering of scientists and experts in the field of water management, including chemists, biologists, civil and agriculture engineers, with a goal to remind people about the significance of fresh water and to promote an interdisciplinary approach and sustainability for fresh water resource management. The Conference has been held since 2011. About 300 scientists and engineers submitted 95 abstracts to the 7th International Scientific and Professional Conference Water for all, out of which 33 was presented orally and 62 as posters. 47 full papers were accepted by the Scientific Committee. 38 full papers became the part of the this Proceedings while 9 papers were accepted for publication in Croatian Journal of Food Science and Technology and Electronic Journal of the Faculty of Civil Engineering Osijek - e-GFOS

Method of measuring angular position based on a new class ofoptoelectronic sensors

У овој докторској дисертацији извршен је преглед постојећих метода мерења угаоног положаја и дат је предлог нове методе за мерење апсолутног угаоног положаја. Предложена мерна метода заснива се на примени трансформације боје објекта из Декартовог RGB простора боја у неки од цилиндричних, кориснички оријентисаних, простора боја (HSV, HSI, HLS). На бази предложене мерне методе конструисан је сензор апсолутног угаоног положаја који се састоји од три оптичка рефлексиона сензора и штампаног шаблона са сивом скалом. Тачност, поновљивост и резолуција мерења, постигнути приликом тестирања сензора су ±1 °, ±0,3 ° и 0,1 °.U ovoj doktorskoj disertaciji izvršen je pregled postojećih metoda merenja ugaonog položaja i dat je predlog nove metode za merenje apsolutnog ugaonog položaja. Predložena merna metoda zasniva se na primeni transformacije boje objekta iz Dekartovog RGB prostora boja u neki od cilindričnih, korisnički orijentisanih, prostora boja (HSV, HSI, HLS). Na bazi predložene merne metode konstruisan je senzor apsolutnog ugaonog položaja koji se sastoji od tri optička refleksiona senzora i štampanog šablona sa sivom skalom. Tačnost, ponovljivost i rezolucija merenja, postignuti prilikom testiranja senzora su ±1 °, ±0,3 ° i 0,1 °.In this doctoral thesis a review of existing methods for angular position measurement is conducted and a new method for measuring absolute angular position is proposed. The proposed measurement method is based on the use of object color transformation from Cartesian RGB color space to one of the user-oriented cylindrical color space (HSV, HSI, HLS). Оn the basis of the proposed measurement method, absolute angular position sensor consisting of three optical reflective sensors and a grayscale printed pattern is constructed. Accuracy, repeatability and resolution of measurement using proposed sensor were ± 1 °, ± 0.3 ° and 0.1 °

Activity of combined gemcitabine therapy on treatment of planocellular carcinoma: A pilot study

BACKGROUND: Drug-orientated, pilot study was conducted to estimate the activity of gemcitabine on treatment of head and neck and lung planocellular carcinoma in combination with either radiotherapy or chemotherapy. METHODS There were 22 patients treated with gemcitabine for planocellular carcinoma of head and neck (9 patients) and lung (13 patients). Combined gemcitabine-radiotherapy was applied in 10 patients while gemcitabine-chemotherapy in 12 patients. Eligible and evaluable patients (22) were with either locally advanced (14 patients) or metastatic (8 patients) stage of the disease. In gemcitabine-radiotherapy group, gemcitabine was given IV, 1000 mg/ m2, on day 1, 8, and 15 during the radiotherapy course as radiopotentiator (65 Gy in 32 fractions for head and neck, and 55 Gy in 20 fractions, split course one month for lung cancer patients). In gemcitabine-chemotherapy group the same dose of gemcitabine was given (4-week schedule) in combination with platinum based cytotoxic drugs. We analyzed response rate and toxicity. RESULTS: Among patients treated for head and neck planocellular carcinoma, there were 67% complete responders while there was 15% complete responders treated for lung cancer. Also, 80% of patients treated in gemcitabine-radiotherapy group had complete response while 50% of those treated in gemc- itabine-chemotherapy group. Actuarial survival as function of tumor control was 52% for lung and 88% for head and neck cancer 12 months after the initiation of treatment. In gemcitabine-radiotherapy group of patients treated for head and neck carcinoma, the radiation mucositis grade III was observed in 80% while in gemcitabine - chemotherapy group of patients the most common side effect (60% of patients) was neutropenia grade II (40%)/III (20%). CONCLUSION: There was no statistically significant difference regarding response rate between two groups of patients (head and neck vs. lung cancer, and gemcitabine- radiotherapy vs. gemcitabine - chemotherapy). However, better clinical results were achieved for head and neck cancer patients, particularly in gemcitabine - radiotherapy group but with significant toxicity due to high gemcitabine dose

Comparative Analysis of Deformation Determination by Applying Fiber-optic 2D Deflection Sensors and Geodetic Measurements

In the paper the description of an experiment for a comparative analysis of two different methods for deformation determination, geodetic and 2D deflection sensors based on fiber-optic curvature sensors (FOCSs) is given. The experiment is performed by a using specially designed assembly which makes it possible to apply both methods. For performing geodetic measurements, a geodetic micro-network is established. Measurements by applying a 2D deflection sensor and three total stations are carried out for comparison. The data processing comprises graphical and numerical analysis of the results. Based on the presented results the potential of 2D deflection sensor application in structural health monitoring (SHM) procedures is indicated. The analysis of the measurement results also indicates the importance of integrating various types of sensors for obtaining more accurate and more reliable deformation measurements results

Surface-modified TiO2 nanoparticles with ascorbic acid: antioxidant properties and efficiency against DNA damage

Ascorbic acid (AA) is a standard antioxidant and its radical scavenging properties also appear to be responsible for its antigenotoxic properties. Nanoparticle-mediated delivery of antioxidant compounds is intended to increase their bioavailability while maintaining their effectiveness. Colloids consisting of the 45-Å TiO2 nanoparticles (NPs) with anatase crystal structure were prepared by acidic hydrolysis of TiCl4. The synthesized TiO2 NPs were characterized using transmission electron microscopy and X-ray diffraction analysis. The charge transfer (CT) complex formation between surface Ti atoms and AA is indicated by immediate appearance of red color. The aim of this study was to compare, for the first time, the antioxidant and antigenotoxic effects of AA attached to the surface of TiO2 NPs with free AA in a wide concentration range. For evaluation of antigenotoxic properties whole blood cells were first treated with 50 μM H2O2 to induce DNA damage, and then exposed to 3 different concentrations of free AA (1.3×10-2, 2.6×10-2, and 3.9×10-2 M) and the same concentrations of AA attached to TiO2 NPs (0.05, 0.1, and 0.15 M) for 30 min at 37 0C. The level of DNA damage was evaluated by comet assay method. For evaluation of antioxidant properties, total antioxidant capacity (TAC), total antioxidative status (TAS) and prooxidative-antioxidative balance (PAB) were determined in human serum pool during 2 and 24 h incubation at 37 °C, without and with terc-buthyl-hydroperoxide (TBH) as exogenously added oxidant. As expected, the results of DNA damage showed that the increase of AA concentration leads to a reduction of DNA damage. The similar concentration dependence was observed for surface-modified TiO2 NPs with AA. So, no significant differences between the antigenotoxic properties of free AA and AA attached to the TiO2 NPs were noticed, but only the highest concentrations showed significant effect in both experimental treatments. Regarding short-term oxidative balance in biological material (serum), during 2h, by measuring the TAC we have showed that the complex NP and AA, so as ascorbic acid showed a significant increase in TAC capacity, compared to native serum. This increase of antioxidative capacity couldn’t be abrogated even with a powerful oxidant, terc-buthylhydroperoxide presence (TBH). After 24h hour incubation the TAC level in both samples decreased towards the baseline level. About the TOS, which measures all oxidative components in plasma such as hydrogen-peroxide and lipid hydroperoxide, the complex of NP and AA versus AA alone showed inconsistent results. Prooxidative-antioxidative balance (PAB) measuring equilibrium between oxidants and antioxidants remains low, almost imponderable after 2h and after 24h serum incubation with the two substances. To summarize, we suggest that surface-modified TiO2 NPs with AA and/or similar compounds can be used to improve their bioavailability while maintaining its beneficial activities.3rd International Congress on Occupational & Environmental Toxicology - ICOETox 2016 and 3rd Ibero-American Meeting on Toxicology and Environmental Health International (IBAMTOX 2016), 21-23 June 2016 | Port