bluuebunny/crossref_metadata_2025_split huggingface dataset:
Some Structural Aspects of Ionic Conductivity in Co-Doped Ceria-Based Electrolytes
Authors: Dudek M. 
Published: January 2014

Abstract
The sinters of co-doped ceria solid solutions with the formula of Ce0.85Sm0.15-x RxO1.9, where R = Y, Gd, Pr, Tb, Ox-0.15, were obtained from powders synthesised by Pechini method. The linear variation of cell parameter a vs. chemical composition was observed for Ce0.85Sm0:15-xRxO1.9, where R = Y, Gd, Tb, 0 <x<0.15 samples. However, the introduction of Pr3+ into Ce0.85Sm0.15-x PrxO1.9 caused a small deviation from linearity due to possible changes in the valence from Pr3+ to Pr4+. The determined values of oxide transference number tion for Ce0.85Sm0.15-xRxO1.9, R = Y, Gd in the temperature range 400-750°C and partial oxygen pressure from 10-6 to 1 atm were close to 1, which indicated that materials investigated exhibited practically pure ionic oxide conductivity. On the other hand, the introduction of Tb3+ or Pr3+ higher than x>0.05 into solid solution Ce0.85Sm0.15-xRxO1.9, R = Tb, Pr caused a decrease in the ionic transference number tion below 1 due to an increase in partial electronic conduction. This fact limiting investigated co-doped terbia and samaria or samaria and praseodymia ceria-based solid solutions for the further application as oxide electrolytes in solid oxide fuel cells. The analysis of bulk and grain boundary values indicated that partial substitution of Sm3+ by Y3+ or Gd3+ caused slight improvements in the ionic conductivity of Ce0.85Sm0.15-xRxO1.9. The highest ionic conductivity was found for solid solution with chemical composition Ce0.85Sm0.1Y0.05O1.9. The selected co-doped ceria samples were tested as solid electrolytes in solid oxide fuel cells operating in the intermediate temperature range 500-750°C.
Technology and Electrophysical Properties of Multiferroic PZT–PFT Ceramics
Authors: Niemiec P. , Skulski R. , Bochenek D. , Wawrzała P. 
Published: January 2014

Abstract
We present the results of obtaining and investigating ceramic samples of solid solution (1-x)(PbZr0.53Ti0.47O3)- x(PbFe0.5Ta0.5O3) [i.e. (1-x)PZT-xPFT] with x =0.25, 0.35 and 0.45 obtained using conventional ceramic technology. These materials belong to class of materials known as multiferroics. Solid solutions PZT-PFT are the lowest-loss room-temperature multiferroics known, and as a result there are very interesting for magnetoelectric devices. Paper presents the results of termogravimetric investigations, EDS, XRD and main dielectric measurements. It has been stated that with increasing content of PFT decreases the mean diameter of grains and more wide distribution of grain diameters is observed. For x =0.25 sharp phase transition from ferroelectric phase to paraelectric one is observed and high values of dielectric permittivity. Composition PZT-PFT with x =0.45 has the lowest values of dielectric permittivity, and the transition is more diffused. The increase of x leads also to the shift of the temperature of maximum of dielectric permittivity towards lower temperatures. Samples with x =0.25 and x =0.35 exhibit very low values of dielectric losses up to about 100°C. Dielectric losses for samples with x =0.45 are higher. For obtained PZT-PFT samples we have investigated P-E hysteresis loops at room temperature for frequency 1 Hz. For composition x =0.25 it after application the field about 2.5 kV/mm polarization is equal approximately 28 μC/cm2, while for x =0.35, and x =0.45 after application the field about 2.0 kV/mm the polarizations are equal about 25 μC/cm2 and 20 μC/cm2 respectively. Very low values of losses and high values of polarization lead to the conclusion that interesting material PZT-PFT for applications should be composition with x =0.25.
The Influence of Fabrication Conditions on the Physical Properties of PLZT:Nd3+ Ceramics
Authors: Płonska M. , Pisarski W.A. , Wodecka-Dus B. , Czekaj D. 
Published: January 2014

Abstract
The aim of this work was to study the effect of fabrication conditions and neodymium co-doping on the physical properties of (Pb0:98La0:02)(Zr0:65Ti0:35)0:98O3, known as PLZT:Nd3+ ceramics. All ceramic powders of these materials were synthesized by the conventional mixed oxide method, from the high purity raw materials (>99.9%). The bulk ceramic samples were sintered by the pressure less sintering and the hot-uniaxial pressing techniques. The study gives a detailed account of the relationships between doping and preparing conditions on the dielectric and optical properties of obtained ceramic materials. Optimal conditions of PLZT:Nd3+ preparation as well as Nd3+ activator concentration were determined in relation to the potential opto-electronic applications.
Effect ofSolvents on Curing Process of Photopolymerizable Ceramic Suspensions
Authors: Falkowski P. , Grzelak A. 
Published: January 2014

Abstract
The effect of solvent on rheological properties and way of preparation of ceramic suspensions or dispersions was presented. The research showed that in case of applied polyester resin the water cannot be used in preparation of UV curable suspensions. However, the highly loaded ceramic dispersion in UV curable media can be prepared if the water is replaced by PEG. Thus, the dispersions with good homogeneity and solids content up to 45-50vol.% of alumina can be obtained. The dispersion prepared in this way can be tape casted and UV cured.
IN-SITU TREATMENT OF GROUNDWATER CONTAMINATED WITH UNDERGROUND COAL GASIFICATION PRODUCTS / OCZYSZCZANIE IN-SITU WÓD PODZIEMNYCH ZANIECZYSZCZONYCH PRZEZ PRODUKTY PODZIEMNEGO ZGAZOWANIA WĘGLA
Authors: Suponik Tomasz , Lutyński Marcin 
Published: January 2014

Abstract
In the paper the contaminants that may be generated in Underground Coal Gasification (UCG) process were listed and include mainly mono- and polycyclic aromatic hydrocarbons, phenols, heavy metals, cyanides, ammonium, chloride and sulphate. As a method of UCG contaminated groundwater treatment a Permeable Reactive Barrier technology was proposed. To assess the effectiveness of this technology two tests were carried out. Granulated activated carbon (GAC) and zeolite, and granulated activated carbon and scrap iron were applied in the first and second test respectively. For these materials the hydro geological parameters called reactive material parameters were determined and discussed. The results of the experiments showed that GAC seems to be the most effective material for phenols, BTX, PAH, cyanides and slightly lowers ammonia removal, while zeolites and scrap iron removed free cyanide, ammonia and heavy metals respectively.
THE IDENTIFICATION OF PARAMETERS OF THEORIES USED FOR PROGNOSES OF POST MINING DEFORMATIONS BY MEANS OF PRESENT SOFTWARE / IDENTYFIKACJA WARTOŚCI PARAMETRÓW TEORII PROGNOZOWANIA WPŁYWÓW PRZY WYKORZYSTANIU WSPÓŁCZESNYCH NARZĘDZI INFORMATYCZNYCH
Authors: Ścigała Roman 
Published: January 2014

Abstract
The characteristic of specialized computer programs has been presented, serving for identification of W. Budryk-S. Knothe theory parameters, used for description of asymptotic state of post-mining deformations, as well as for transient state. The software is the result of several years of authors’ work. It is a part of complete software system designed for forecasting of underground mining influences on the rock mass and land surface and graphical processing of calculations results. Apart from software description, a short example of its practical utilization has been attached.
EVALUATION OF DRY MATTER PRODUCTION OF MISCANTHUS SINENSIS (TATAI) IN THE CONDITIONS OF SOUTH-WESTERN SLOVAKIA
Authors: Prčík Martin , Kotrla Marián 
Published: January 2014

Abstract
In this paper, we present the results of research of phytomass production allocated to aboveground organs, leaves and stalks, after the third growing year. The research was conducted in the field experiment conditions of Farm holding in Kolíňany. The results of the aboveground dry matter production are expressed in tonnes of dry weight produced on the area of one hectare (t.ha-1). The total dry weight of the aboveground biomass was 6.89 t.ha-1 at the end of the first growing year 2010. In the growing year 2011, it reached 15.21 t.ha-1 (an increase by 121 %.) The total dry weight of the aboveground phytomass increased by 37% compared to 2011, and it reached 20.82 t.ha-1 in the third growing year (2012). The increase of phytomass is directly proportional to off shoot circle. Average off shoot circle of individuals in the first growing year was 300 mm and the average number of stems produced in a clump was 37.60. In 2011, the average off shoot circle of individuals was 502 mm and there were 43.73 stems created in a clump. In the third growing period of 2013, the extension of the off shoot circle by 113.7% (641 mm) was registered in comparison with 2010 and the amount of 80.19 stems per clump was recorded.
BIOGAS PRODUCTION FROM AMARANTH BIOMASS
Authors: Sitkey Vladimír , Gaduš Ján , Kliský Ľubomír , Dudák Alexander 
Published: January 2014

Abstract
Energy variety of amaranth (Amaranthus spp.) was grown in large-scale trials in order to verify the capability of its cultivation and use as a renewable energy source in a biogas plant. The possibility of biogas production using anaerobic co-fermentation of manure and amaranth silage was verified in the experimental horizontal fermentor of 5 m3 volume, working at mesophilic conditions of 38-40 °C. The goal of the work was also to identify the optimum conditions for growth, harvesting and preservation of amaranth biomass, to optimize biogas production process, and to test the residual slurry from digestion process as a high quality organic fertilizer. The average yield of green amaranth biomass was 51.66 t.ha-1 with dry matter content of 37%. Based on the reached results it can be concluded that amaranth silage, solely or together with another organic materials of agricultural origin, is a suitable raw material for biogas production.
THE INFLUENCE OF YEAR-ROUND WEATHER CONDITIONS AND FERTILIZATION ON THE PHYTOMASS YIELD OF AMARANTH (AMARANTHUS L.)
Authors: Illéš Ladislav , Candráková Eva , Pospišil Richard , Žembery Jozef 
Published: January 2014

Abstract
In the years 2010 and 2011, a field trial was established in the administrative area Kolinany, Barack farm. We evaluated the growth of aboveground phytomass depending on different levels of fertilization. In the climatically unbalanced growing years, the phytomass yield of amaranth was different. Extremely wet conditions during the growing season exceeding long-term normal precipitation confirmed the assumption of high growth of aboveground phytomass in the observed amaranth genotype. In 2010, the highest amaranth aboveground dry matter in phytomass reached 3231.40 g m2 in the variant with the fertilization dose of 150 kg ha-1. In the climatically different year 2011 with lower precipitation, the highest aboveground phytomass yield of 3956.95 g m2 was reached in the fertilized variant as well.
Impact of Multipath GPS Signal Spreading on Precision of Us er Localization
Authors: Chrastina Jozef , Polonec Tomáš , Janoško Ivan , Tulík Juraj 
Published: January 2014

Abstract
This paper focuses on measuring the inaccuracy of localization using a global positioning system. It describes the types and causes of navigation errors as well as the impact of multipath signal spreading on determining the GPS location. The aim of the experiment is to quantify the degree of influence of GPS multipath signal spreading in urban environments compared with measurements in the open air. During the experiment, we have used a Holux M-1000C GPS device in the DGPS / SBAS mode using the EGNOS technology.
In vivo quercetol effect in lead acetate poisoning
Authors: Roncea Florentina , Miresan Horatiu , Rosca Adrian Cosmin , Bratu Mihaela , Popescu Antoanela 
Published: January 2014

Abstract The present study investigated the influence of quercetol upon δ-aminolevulinic acid (△ -ALA) urine concentration as marker of lead poisoning. The study was conducted on six lots of 6 mature Wistar rats of both sexes, lots not poisoned treated with different concentrations of quercetol (Q1, Q2), control (L6M), lot poisoned untreated (L3Pb), lots poisoned and treated with Q (L4Q1Pb and L5Q2Pb). After 11 days urine from 24 hours was collected for △-ALA spectrophotometric assay and testing the significance of mean difference of by "t" test Student at p <0.05. Statistical analysis of the data presented shows that compared to L2Q2 and L6M the amount of δ-ALA excreted in urine under quercetol influence (L4Q1Pb) shows statistical significance compared to (L2Q2) the amount of δ-ALA excreted in urine compared to (L3Pb) shows statistical significance. Different concentrations of quercetol (Q1, Q2), did not produce significant changes in the δ-ALA excreted compared with values of (L3Pb). Difference between means is probably due to sampling fluctuation, is not significant, reduced growth to eliminate δ-ALA on L4Q1Pb and L5Q2Pb is believed to be due to iron complex formation, reducing hemoglobin synthesis. From the results we conclude that hem biosynthesis does not start to grow under quercetol protection. The obtained data are not relevant statistical since interpretations were performed on non homogeneous groups in number of individuals, the percentage of mortality variability and high levels of standard deviation calculated from each lot.
The dynamic simulation of the natural gas transportation
Authors: Eparu Cristian , Rădulescu Renata , Stoica Doru 
Published: January 2014

AbstractThe natural gas consumption of the operators connected to the gas transport system depends on the gas needs. As gas needs vary in time, the whole process of gas transportation is, therefore, nonstationary. The paper presents nonstationary simulations for a gas transportation network and highlights the parameters values (flows, pressures) that are necessary to assure the safety of the system.
Environmental pollution in the petroleum refining industry
Authors: Damian Cristina 
Published: January 2014

AbstractThe petroleum refining industry has a significant influence on the total pollution of the environment by industrial discharges and wastes. In the operation of petroleum refineries, the atmosphere is polluted with hydrogen sulfide, sulfur dioxide, nitrogen oxides, carbon monoxide, hydrocarbons, and other toxic substances. The main pollutants are sulfur dioxide and hydrocarbons. The fresh water used by refineries in product cooling is returned to the original source of water containing crude oil, petroleum products, and mineral salts as contaminants. The extent of air and water pollution depends on the particular processing technology, control measures that are employed and also on the scale of the processing. In working out these measures, the primary attention of scientific-research institutes and design and planning organizations must be directed not only towards how to reduce the contaminating and poisoning action of industrial discharges on the environment, but primarily towards preventing or minimizing these discharges in the refineries.
Mathematical model for power consumption at mixing of industrial and domestic wastewater sludge
Authors: Sterpu Ancaelena Eliza , Koncsag Claudia Irina , Dumitru Anca Iuliana , Mihalcea Alina-Daniela 
Published: January 2014

AbstractPhysical investigations have been carried out to characterize the power consumption in a laboratory autoclave vessel equipped with an anchor impeller (diameter d = 0.068 mm), without baffles, at 8 speed ratio, from 100 to 800 rpm. The laminar flow regime was investigated using sludge proceeding from the treatment of mixed industrial and domestic wastewater, with a view to its subsequent processing: mixing, filtration, dewatering. The mathematical modeling focused on finding an accurate equation linking the Power number (Np) and the Reynolds number (Re) at different levels (H) of sludge in the vessel. The rheological curves indicate that the sludge have non-Newtonian behaviors which are better described by the Herschel-Buckley model. The models resulted from the Np variation versus Re are power function type Np = a ×Reb , where the coefficient a is a linear functions of H/d ratio and b = -1.016 have a constant value.
The framing of the raw materials used for manufacturing some rough ceramic materials into polinary oxide systems
Authors: Szöke Anna-Maria 
Published: January 2014

AbstractIn this paper it is presented the framing into polinary oxide systems in the case of optimal design of the oxide composition for obtaining raw ceramic materials. These calculations were carried out on two raw materials, which were the base of the experimental researches, for finding out the potential mineralogical composition. It was also followed, for the two raw materials, the framing options of the composition in oxide systems and the assessment of their belongings to possible subsystems.
Quantification of sugar in different brands of drinks
Authors: Dobrinas Simona , Soceanu Alina , Stanciu Gabriela , Popescu Viorica 
Published: January 2014

AbstractThe levels of invert sugar (glucose/fructose mixture resulting from inversion) were determined in different brands of orange, grapefruit, lemon, apricot and raspberry products. Samples of fresh juice, soft drink, syrup, nectar and compote were representative of the Romanian market. The invert sugar was quantified by Ofner’s method (a titrimetric method) and the refractive and Brix indices were measured for the quantification of sucrose in studied samples. International Commission for Uniform Methods of Sugar Analysis accepts reading of sugar content based on the refractive properties of sucrose despite the fact that the sugar in analyzed juice sample is fructose, not sucrose. This usually does not result in significant error. There were significant differences among orange, grapefruit, lemon, apricot and raspberry products brands, in the levels of sugars.
The 3 vs 1 game build-up effectiveness examination in physical and technical tests of 11-year-old football players
Authors: Tóth jr. Janos , Zalai David , Tóth Janos , Hamar Pál 
Published: January 2014

Summary
Study aim: The aim of this study is to prove that young players who have been coached with the main focus on technical ability and player interaction, perform better when tested on physical and technical attributes.
Material and methods: We examined 2 separate groups made up of 15 players each. After thorough analysis, the experimental group practiced playing forms to building up 3 vs 1 games weekly for one year. The control group did not follow this training pattern.
Results: Over the course of the year there was a constant development in all aspects of the examination. Furthermore, both physical and technical attributes were significantly better . The same cannot be concluded from the analysis of the control group, in which the performance level even dropped in some aspects of the examination.
Conclusion: The results show that players practicing the playing forms on a weekly basis performed better in physical and technical tests. In addition, subjective experience has also underlined the effect of the method.
Use of leaf morphometric parameters for identification of the most common cultivated intraspecific taxa of Tilia platyphyllos
Authors: Evarte-Bundere Gunta , Evarts-Bunders Pēteris 
Published: January 2014

Abstract Evarte-Bundere G., Evarts-Bunders P., 2013: Use of leaf morphometric parameters for identification of the most common cultivated intraspecific taxa of Tilia platyphyllos [Morfometrinių požymių panaudojimas dažniausiems kultūriniams Tilia platyphyllos vidurūšiniams taksonams apibūdinti]. - Bot. Lith., 19(2): 83-90. To determine variation of the most important morphological parameters of Tilia platyphyllos Scop., we studied four most frequently found in Latvia taxa: T. platyphyllos subsp. platyphyllos, T. platyphyllos subsp. cordifolia (Besser) C.K.Schneid., T. platyphyllos ‘Rubra’, T. platyphyllos ‘Obliqua.’ Morphometric measurements (length of petioles, width and length of leaf blades, pubescence and margin of leaves) were performed for 10 different specimens of every selected taxon measuring five typical leaves from each specimen. The cultivated intraspecific taxa of Tilia platyphyllos differed by the following morphometric parameters - the pubescence of leaves, the margin of leaves and the length of leaf blades. No significant differences were ascertained between taxa in such morphometric parameters as the width of leaf blades and the length of petioles.
Notes on some new and interesting Greenland lichens with particular emphasis on high arctic taxa
Authors: Hansen Eric Steen 
Published: January 2014

Abstract Hansen E. S., 2013: Notes on some new and interesting Greenland lichens with particular emphasis on high arctic taxa [Pastabos apie retas ir įdomias Grenlandijos kerpes, ypač poliarinių dykumų taksonus]. - Bot. Lith., 19(2): 149-156. The paper lists 73 taxa of Greenland lichens. Immersaria athroocarpa, Melanelixia subaurifera and Polyblastia sakkobanensis are recorded for the first time from Greenland. Melanelia agnata, Melanohalea exasperatula and Peltigera britannica are new to South Greenland, while Miriquidica intrudens and Peltigera ponojensis are new to Central West Greenland. Caloplaca citrina, Cladonia galindezii, Pertusaria bryontha, Protoblastenia rupestris, Sphaerophorus globosus and Staurothele drummondii represent northern range extensions in North East Greenland. New localities north of 80° N are given for 59 lichen taxa from Greenland.
Different Successful Patterns for Implementing Holding Model in Public Sector
Authors: Todorović Ivan , Komazec Stefan , Čudanov Mladen 
Published: January 2014

Abstract
Background: Transitions in the modern business environment cause significant organizational changes not only in private companies, but also in the public sector. Introduction of an adequate organizational model for the public sector could improve the quality level of public services. Objectives: This article aims to present general benefits of the application of the holding organizational paradigm in the public sector through a parallel analysis of several cases that were observed individually in our previous research. The goal is to suggest possible restructuring directions to policy makers in cities where the public sector has not been adjusted to the changes in the modern business environment. Methods: The case study research based on the documentation analysis, interviews and direct observation using the standard management consulting practice provided an additional and deeper insight into the functioning of public enterprises in one European capital and one small municipality. Results: The examples presented in this paper showed that the application of the holding institutional solution in the public sector leads to an improved command, an increased level of control, reduced management costs, better allocation of city resources and decreased overheads in the public sector. Conclusions: Switching from a functional towards a network model of the organizational structure improved the performance of public enterprises and increased the quality of public services