bluuebunny/crossref_metadata_2025 huggingface dataset:
Versailles Redux? Eurozone Competitiveness in a Dynamic Balassa-Samuelson-Penn Framework
Authors: Stahler Kevin , Subramanian Arvind
Published: May 2015

Prima facie, competitiveness adjustments in the eurozone, based on unit labor cost developments, appear sensible and in line with what the economic analyst might have predicted and the economic doctor might have ordered. But a broader and arguably better – Balassa-Samuelson-Penn (BSP) – framework for analyzing these adjustments paints a very different picture. Taking advantage of the newly released PPP-based estimates of the International Comparison Program (2011), we identify a causal BSP relationship. We apply this framework to computing more appropriate measures of real competitiveness changes in Europe and other advanced economies in the aftermath of the recent global crises. There has been a deterioration, not improvement, in competitiveness in the periphery countries between 2007 and 2013. Second, the pattern of adjustment within the eurozone has been dramatically perverse, with Germany having improved competitiveness by 9% and with Greece’s having deteriorated by 9%. Third, real competitiveness changes are strongly correlated with nominal exchange rate changes, which suggests the importance of having a flexible (and preferably independent) currency for effecting external adjustments. Fourth, internal devaluation – defined as real competitiveness improvements in excess of nominal exchange rate changes – is possible but seems limited in scope and magnitude. Our results are robust to adjusting the BSP framework to take account of the special circumstances of countries experiencing unemployment. Even if we ignore the BSP effect, the broad pattern of limited and lopsided adjustment in the eurozone remains.
Neuro-Fuzzy Modeling for Multi-Objective Test Suite Optimization
Authors: Anwar Zeeshan , Ahsan Ali , Catal Cagatay
Published: May 2015

Regression testing is a type of testing activity, which ensures that source code changes do not affect the unmodified portions of the software adversely. This testing activity may be very expensive in, some cases, due to the required time to execute the test suite. In order to execute the regression tests in a cost-effective manner, the optimization of regression test suite is crucial. This optimization can be achieved by applying test suite reduction (TSR), regression test selection (RTS), or test case prioritization (TCP) techniques. In this paper, we designed and implemented an expert system for TSR problem by using neuro-fuzzy modeling-based approaches known as “adaptive neuro-fuzzy inference system with grid partitioning” (ANFIS-GP) and “adaptive neuro-fuzzy inference system with subtractive clustering” (ANFIS-SC). Two case studies were performed to validate the model and fuzzy logic, multi-objective genetic algorithms (MOGAs), non-dominated sorting genetic algorithm (NSGA-II) and multi-objective particle swarm optimization (MOPSO) algorithms were used for benchmarking. The performance of the models were evaluated in terms of reduction of test suite size, reduction in fault detection rate, reduction in test suite execution time, and reduction in requirement coverage. The experimental results showed that our ANFIS-based optimization system is very effective to optimize the regression test suite and provides better performance than the other approaches evaluated in this study. Size and execution time of the test suite is reduced up to 50%, whereas loss in fault detection rate is between 0% and 25%.
Observed secular gravity trend at Onsala station
with the FG5 gravimeter from Hannover
Authors: Timmen L. , Engfeldt A. , Scherneck H.-G.
Published: May 2015

Annual absolute gravity measurements with a
FG5 instrument were performed in Onsala Space Observatory
by the Institute of Geodesy of the Leibniz Universität
Hannover from 2003 to 2011 and have been continued with
the upgraded meter FG5X in 2014. Lantmäteriet, Gävle,
with their FG5 absolute gravimeter have visited Onsala
since 2007. Because small systematic errors may be inherent
in each absolute gravimeter, their measuring level and
a resulting bias (offset) between the instruments must be
controlled over time by means of inter-comparison. From
2007 to 2014, 8 direct comparisons took place well distributed
over the time span. A complete re-processing of
the absolute gravity observations with the Hannover instrument
has been conducted to improve the reduction of
unwanted gravity effects. A new tidal model is based on
continuous time series recorded with the GWR superconducting
gravimeter at Onsala since 2009. The loading effect
of the Kattegat is described with a varying sea bottom
pressure (water and air mass load) and has been validated
with the continuous gravity measurements. For the
land uplift,which is a result of the still ongoing glacial isostatic
adjustment in Fennoscandia, a secular gravity trend
of −0.22 μGal/yr was obtained with a standard deviation
of 0.17 μGal/yr. That indicates a slight uplift but is still not
significantly different from zero.
A comparative study of friction factor correlations for high concentrate slurry flow in smooth pipes
Authors: Assefa K. M. , Kaushal D. R.
Published: May 2015

A number of correlations for friction factor determinations in smooth pipes have been proposed in the past decades. The accuracy and applicability of these friction factor formulas should be examined. Based on this notion the paper is designed to provide a comparative study of friction factor correlations in smooth pipes for all flow regimes of Bingham fluids. Nine models were chosen. The comparisons of the selected equations with the existing experimental results, which are available in the literature, were expressed through MARE, MRE+, MRE-, RMSE, Ѳ, and S. The statistical comparisons were also carried out using MSC and AIC. The analyses show that the Wilson-Thomas (1985) and Morrison (2013) models are best fit models to the experimental data for the Reynolds number up to 40000. Within this range, both models can be used alternately. But beyond this Re value the discrepancy of the Wilson-Thomas model is higher than the Morrison model. In view of the fact that the Morrison model requires fewer calculations and parameters as well as a single equation is used to compute the friction factor for all flow regimes, it is the authors’ advice to use this model for friction factor estimation for the flow of Bingham fluids in smooth pipes as an alternative to the Moody chart and other implicit formulae.
Stochastic structure of annual discharges of large European rivers
Authors: Stojković Milan , Prohaska Stevan , Plavšić Jasna
Published: May 2015

Water resource has become a guarantee for sustainable development on both local and global scales. Exploiting water resources involves development of hydrological models for water management planning. In this paper we present a new stochastic model for generation of mean annul flows. The model is based on historical characteristics of time series of annual flows and consists of the trend component, long-term periodic component and stochastic component. The rest of specified components are model errors which are represented as a random time series. The random time series is generated by the single bootstrap model (SBM). Stochastic ensemble of error terms at the single hydrological station is formed using the SBM method. The ultimate stochastic model gives solutions of annual flows and presents a useful tool for integrated river basin planning and water management studies. The model is applied for ten large European rivers with long observed period. Validation of model results suggests that the stochastic flows simulated by the model can be used for hydrological simulations in river basins.
Face-to-Face or Sequential Mixed-Mode Surveys Among Non-Western Minorities in the Netherlands: The Effect of Different Survey Designs on the Possibility of Nonresponse Bias
Authors: Kappelhof Johannes W.S.
Published: May 2015

This article compares the quality of response samples based on a single mode CAPI survey design with the quality of response samples based on a sequential mixed-mode (CAWI-CATICAPI) survey design among four non-Western minority ethnic groups in the Netherlands. The quality is assessed with respect to the representativity of the response samples and the estimated potential for nonresponse bias in survey estimates based on auxiliary variables and the response rate. This article also investigates if these designs systematically enhance response rates differently among various sociodemographic subgroups based on auxiliary variables. Also, costs and cost-related issues particular to this sequential mixed-mode design are discussed. The results show that sequential mixed mode surveys among non-Western ethnic minorities in the Netherlands lead to less representative response samples and show more potential for nonresponse bias in survey estimates. Furthermore, the designs lead to systematic differences in response rates among various sociodemographic subgroups, such as older age groups. Both designs also cause some of the same sociodemographic subgroups to be systematically underrepresented among all non-Western ethnic minority groups. Finally, the results show that in this instance the cost savings did not outweigh the reduction in quality.
On Estimating Quantiles Using Auxiliary Information
Authors: Berger Yves G. , Munoz Juan F.
Published: May 2015

We propose a transformation-based approach for estimating quantiles using auxiliary information. The proposed estimators can be easily implemented using a regression estimator. We show that the proposed estimators are consistent and asymptotically unbiased. The main advantage of the proposed estimators is their simplicity. Despite the fact the proposed estimators are not necessarily more efficient than their competitors, they offer a good compromise between accuracy and simplicity. They can be used under single and multistage sampling designs with unequal selection probabilities. A simulation study supports our finding and shows that the proposed estimators are robust and of an acceptable accuracy compared to alternative estimators, which can be more computationally intensive.
A laboratory and field condition comparison of life table parameters of Aphis gossypii Glover (Hemiptera: Aphididae)
Authors: Hosseini-Tabesh Behnaz , Sahragard Ahad , Karimi-Malati Azadeh
Published: May 2015

Life table studies are essential tools for understanding population dynamics. The life table parameters of Aphis gossypii Glover (Hemiptera: Aphididae) feeding on the host plant, Hibiscus syriacus L. were studied under laboratory (25±1°C and relative humidity of 65±5% and a photoperiod of 16L : 8D h) and field conditions (23-43°C, and relative humidity of 27-95%). The data were analysed using the age-stage, two-sex life table theory. The life table studies were started with 50 and 40 nymphs in laboratory and field conditions, respectively. Under laboratory conditions, A. gossypii reared on H. syriacus had a higher survival rate, fecundity, and longevity than those reared under field conditions. When reared under field conditions, A. gossypii had a longer nymphal developmental time, shorter adult longevity, and lower fecundity than those reared under laboratory conditions. The intrinsic rate of increase (r), net reproductive rate (R0), and the finite rate of increase (λ) under laboratory conditions, were higher than those obtained under field conditions. Nevertheless, there were no significant differences in the mean generation time T (days) between field and laboratory conditions. In the present study, the results clearly showed that life table parameters of A. gossypii were significantly different under field and laboratory conditions. These results could help us to understand the A. gossypii population dynamics under field conditions. The results could also help us make better management decisions for economically important crops
Protease purification and characterization of a serine protease inhibitor from Egyptian varieties of soybean seeds and its efficacy against Spodoptera littoralis
Authors: El-latif Ashraf Oukasha Abd
Published: May 2015

Serine inhibitors have been described in many plant species and are universal throughout the plant kingdom. Trypsin inhibitors are the most common type. In the present study, trypsin and chymotrypsin inhibitory activity was detected in the seed flour extracts of four Egyptian varieties of soybean (Glycine max). The soybean variety, Giza 22, was found to have higher trypsin and chymotrypsin inhibitory potential compared to other tested soybean varieties. For this reason, Giza 22 was selected for further purification studies which used ammonium sulphate fractionation and DEAE-Sephadex A-25 column. Soybean purified proteins showed a single band on SDS-PAGE corresponding to a molecular mass of 17.9 kDa. The purified inhibitor was stable at temperatures below 60°C and was active at a wide range of pH, from 2 to 12 pH. The kinetic analysis revealed a non-competitive type of inhibition against trypsin and chymotrypsin enzymes. The inhibitor constant (Ki) values suggested that the inhibitor has higher affinity toward a trypsin enzyme than to a chymotrypsin enzyme. Purified inhibitor was found to have deep and negative effects on the mean larval weight, larval mortality, pupation, and mean pupal weight of Spodoptera littoralis. It may be concluded, that soybean protease inhibitor gene(s) could be potential targets for those future studies which are concerned with developing insect resistant transgenic plants
Aphid migrant activity in refuge habitats of the Wielkopolska agricultural landscape
Authors: Wilkaniec Barbara , Borowiak-Sobkowiak Beata , Wilkaniec Agnieszka , Kubasik Wojciech , Kozłowska Maria , Dolańska-Niedbała Ewa
Published: May 2015

Refuge habitats have a stabilising effect on the entomofauna in the agricultural landscape. The objective of this research was to follow the migrant activity of aphids in two types of refuge habitats: shrubs and roadsides of rural areas. Moericke traps method were used for testing the seasonal activity of aphids. The dynamics of species numbers were assessed, and the phenology of the dominating taxa was examined. From 2008 to 2010, more than 5,000 winged aphids from 94 species were caught in shrub habitats, and 83 species were caught in rural roadside habitats. The characteristics of aphid groups were defined on the basis of selected indicators. Annually, in both locations, flight activity was shown by a group of several taxa. The rank position of the species was varied in the particular sites and years of the research. Species participation differed when analysing aphid flights, so the seasons were divided into three separate periods: spring, summer, and autumn
Propagation of Surface Waves in a Homogeneous Layer of Finite Thickness over an Initially Stressed Functionally Graded Magnetic-Electric-Elastic Half-Space
Authors: Li Li , Wei P. J.
Published: May 2015

The propagation behaviour of Love wave in an initially stressed functionally graded magnetic-electric-elastic half-space carrying a homogeneous layer is investigated. The material parameters in the substrate are assumed to vary exponentially along the thickness direction only. The velocity equations of Love wave are derived on the electrically or magnetically open circuit and short circuit boundary conditions, based on the equations of motion of the graded magnetic-electric-elastic mate- rial with the initial stresses and the free traction boundary conditions of surface and the continuous boundary conditions of interface. The dispersive curves are obtained numerically and the influences of the initial stresses and the material gradient index on the dispersive curves are dis- cussed. The investigation provides a basis for the development of new functionally graded magneto-electro-elastic surface wave devices.
Roosting Colony of Cormorants (Phalacrocorax Carbo Sinensis L.) as a Source of Nutrients for the Lake
Authors: Piotr Klimaszyk , Tomasz Joniak , Piotr Rzymski
Published: May 2015

Since 2005, great cormorants have been observed on the Lake Góreckie (Wielkopolski National Park) shoreline. The population of these birds occurring within the lake has gradually increased. In autumn 2008, more than 100 individuals were observed. In the period 2009-2012 the number of birds occupying the island periodically exceeded 250 individuals. So far, there is no breeding colony of great cormorants, but the birds have established a roosting colony on the island. In the period 2009-2012 we conducted research on the impact of the colony of great cormorants on the accumulation of nitrogen, phosphorus and other elements in soils beneath the colony and transfer of chemical elements from the colony to a nearby freshwater ecosystem. Our results show that a relatively small and recent colony of great cormorants can significantly affect the chemistry of soil. Compared to a control, the soil beneath the colony was characterized by statistically higher concentrations of nitrogen and phosphorus. A significant accumulation of nutrients was observed in the topsoil zone (to a depth of about 20 cm). Enrichment of soil in chemical elements has resulted in their further transport to a nearby lake. Compared to the control, the groundwater and surface runoff from the colony area revealed several-fold higher concentrations of nitrogen and phosphorus. The maximum abundance of cormorants in the roosting colony was reflected in the elevated concentrations of nitrogen and phosphorus in the littoral water near the colony. Our study demonstrates that the roosting colony of great cormorants can play a significant role in accelerating the eutrophication of surface waters.
Changes in the surface area of lakes in the Gwda River basin
Authors: Katarzyna Kubiak-Wójcicka , Lewandowska Izabela
Published: May 2015

This paper presents lake surface area changes that have taken place in the Gwda River basin. The studies were conducted on the basis of the cartographic materials released since the beginning of the twentieth century until the present times. The starting point was the area of all lakes greater than 1 ha which are present on the MPHP map from 2010. The assessment of the changes in the surface area of lakes in the Gwda River basin during approximately the last 100 years was possible thanks to the use of German topographic maps, so called Messtischblatt, at a scale of 1: 25 000 released between 1919 and 1944. The area of all the studied lakes has decreased by 465.09 ha (from 12783.62 ha at the beginning of the twentieth century to 12318.53 ha at the present time). Despite the general trend of lake atrophy, in particular cases one may observe an increase in the water surface area. This is the result of hydrotechnical works leading to river and lake damming, which in turn hampers the pace of atrophy.
Bioaccumulation of Aluminium in Hydromacrophytes in Polish Coastal Lakes
Authors: Senze Magdalena , Kowalska-Góralska Monika
Published: May 2015

The research on aluminium content was conducted in water and on aquatic flora of Polish lakes in the central part of the coast. The study included the lakes Sarbsko, Choczewskie, Bia.e, K.odno, D.brze and Salino investigated in the summer of 2013. The examined lakes belong mainly to the direct basin of the Baltic Sea. Samples of aquatic plants and lake waters were collected. In the water samples pH and electrolytic conductivity were measured. The aluminium content was determined both in water and aquatic plants. Submerged hydromacrophyte studies included Myriophyllum alterniflorum L., Potamogeton perfoliatus L. and Ceratophyllum demersum L. Emergent hydromacrophyte studies included Phragmites australis (Cav.) Trin. ex Steud., Juncus bulbosus L., Iris pseudacorus L., Eleocharis palustris (L.) Roem. % Schult., Phalaris arundinacea L., Carex riparia Curt., Mentha aquatic L., Stratiotes aloides L., Alisma plantago-aquatica L., Glyceria maxima (Hartman) Holmb., Sagittaria sagittifolia L., Scirpus lacustris L. and Typha angustifolia L. The purpose of this investigation was the determination of the aluminium content in submerged and emergent hydromacrophytes and also the definition of their bioaccumulative abilities. The average concentration of aluminium in water was 2.68 fęg Al dm.3. The average content of aluminium in plants was 2.8015 mg Al kg.1. The bioaccumulation factor ranged from BCF=19.74 to BCF=16619. On the basis of the analysis of the aluminium content in water and aquatic plants results show that both water and plants were characterized by a moderate level of aluminium. The recorded concentrations indicate a mid-range value and are much lower than those which are quoted for a variety of surface waters in various parts of the world.
Random cubatures and quasi-Monte Carlo methods
Authors: Antonov Anton A. , Ermakov Sergej M.
Published: May 2015

We establish and examine the deep connection between highly stratified random cubature formulas and quasi-Monte Carlo methods.
A class of such formulas, designed to exactly integrate the introduced generalized s-dimensional Haar system, is shown to have additional variance reduction compared to the known theoretical upper bound. We propose several equivalent expressions for the variance within the standard quasi-Monte Carlo setting. The theory of random cubatures is supplemented with both refined versions of known results and completely new facts.
Some Environmentally Relevant Reactions of Cerium Oxide
Authors: Janoš Pavel , Ederer Jakub , Došek Marek
Published: May 2015

Reactive forms of cerium oxide were prepared by a thermal decomposition of various precursors, namely carbonates, oxalates and citrates, commercially available nanocrystalline cerium oxide (nanoceria) was involved in the study for comparison. Scanning electron microscopy (SEM) and x-ray diffraction analysis (XRD) were used to examine the morphology and crystallinity of the samples, respectively, whereas the Brunauer-Emmett-Teller (BET) method of nitrogen adsorption was used to determine surface areas. Interactions of cerium oxide with some phosphorus-containing compounds were investigated. Some of the examined samples, especially those prepared by annealing from carbonate precursors, exhibited an outstanding ability to destroy highly toxic organophosphates, such as pesticides (parathion methyl), or nerve agents (soman, VX). There were identified some relations between the degradation efficiency of cerium oxides and their crystallinity. It was also shown that cerium oxide is able to destroy one of widely used flame retardants - triphenyl phosphate. A phosphatase-mimetic activity of various cerium oxides was examined with the aid of a standardized phosphatase test.
X-ray diffraction and Mössbauer spectroscopy studies of a mechanosynthesized Fe75B25 alloy
Authors: Jartych Elżbieta , Kubalova Ludmila M. , Fadeeva Victoria I.
Published: May 2015

In this work, the process of formation of metastable phases was investigated for the Fe75B25 composition. Mechanical synthesis was performed in a MAPF-2M high-energy planetary ball mill under an argon atmosphere. X-ray diffraction (XRD), differential scanning calorimetry (DSC), and Mössbauer spectroscopy (MS) were applied to recognize the phases. After 6 h of milling, the material consisted of two phases, that is, metastable tetragonal t-Fe2B and amorphous phases. During further thermal processing, the metastable phase was transformed into the stable Fe2B phase.
Magnetic nanowires (Fe, Fe-Co, Fe-Ni) – magnetic moment reorientation in respect of wires composition
Authors: Kalska-Szostko Beata , Wykowska Urszula , Satuła Dariusz
Published: May 2015

Magnetic nanowires of Fe, Fe-Co, and Fe-Ni alloy and layered structure were prepared by electrochemical alternating current (AC) deposition method. The morphology of the nanowires in and without the matrix was studied by energy dispersive X-ray spectroscopy (EDX), scanning electron microscopy (SEM), and X-ray diffraction (XRD), respectively. The wires either show strong dependence on the combination of elements deposition (alloy or layered) or chemical composition (Co or Ni). The magnetic properties of the nanostructures were determined on the basis of Mössbauer spectroscopy (MS).
Interactions between osmium atoms dissolved in iron observed by the 57Fe Mössbauer spectroscopy
Authors: Konieczny Robert , Idczak Rafał , Chojcan Jan
Published: May 2015

The room temperature 57Fe Mössbauer spectra for binary iron-based solid solutions Fe1−x
Os
x
, with x in the range 0.01 ≤ x ≤ 0.05, were analyzed in terms of binding energy E
b between two Os atoms in the Fe-Os system. The extrapolated values of E
b for x = 0 were used for computation of enthalpy of solution of osmium in iron. The result was compared with that resulting from the cellular atomic model of alloys by Miedema. The comparison shows that our findings are in qualitative agreement with the Miedema's model predictions.
Search for canted spin arrangement in Er2−

x
Tb
x
Fe14B with Mössbauer spectroscopy
Authors: Kurzydło Piotr M. , Bogacz Bogdan F. , Pędziwiatr Antoni T. , Oleszak Dariusz , Przewoźnik Janusz
Published: May 2015

The materials studied were polycrystalline compounds Er2−

x
Tb
x
Fe14B (x = 0.1, 0.2, 0.3, 0.4) which crystallize in a tetragonal lattice and display a variety of spin arrangements. The compounds have been measured with 57Fe Mössbauer spectroscopy over the temperature range 80–320 K in order to investigate the spin reorientation processes. Each compound was studied in a wide temperature range, with precise Mössbauer scanning in the vicinity of the transition. The set of spectra obtained for a given compound was analyzed using simultaneous fitting procedure to investigate the influence of the transition on the shape of the spectra. The fitting program was specified to analyze the transition according to the ‘two state model’: spins flip abruptly from initial angle to final arrangement (90° angle). Obtained results suggest that spin reorientation process cannot be described using only the mentioned above model. Additional computer simulations based on the Yamada–Kato model were conducted to determine temperature range and the type of spin alignments in the vicinity of the transition. These theoretical results supported by spectra analysis suggest the existence of intermediate (canted) spin arrangements in the studied compounds. The spin arrangement diagram was constructed.
Position of Fe ions in MgO crystalline structure
Authors: Szczerba Jacek , Prorok Ryszard , Stoch Paweł , Śnieżek Edyta , Jastrzębska Ilona
Published: May 2015

Magnesium oxide (MgO) is one of the most important raw materials in many branches of industry. Magnesium oxide is a popular refractory raw material because of its high refractoriness and high resistance to basic slags and environment. In many cases, use of MgO is limited by its properties, especially the presence of secondary phases like iron oxides. The amount and distribution of iron oxides can strongly influence the technological properties of MgO and depend on the manufacturing method, particularly the heat-treatment process. The aim of the study was to evaluate the influence of the heat-treatment process on amount and distribution of iron ions in a magnesium oxide lattice. The 57Fe Mössbauer effect measurements of fused and sintered magnesium oxide samples doped by the iron oxide were conducted. Investigation reveals in both cases the presence of Fe2+ as well as Fe3+ ions. Fe2+ ions occupy Mg2+ octahedral sites in the MgO lattice, whereas the Fe3+ ions are located in highly distorted octahedral coordination. The amount of Fe2+ varies from around 66% for fused samples to 30% for sintered samples.
Hyperfine interaction and some thermomagnetic properties of amorphous and partially crystallized Fe70−xMxMo5Cr4Nb6B15 (M = Co or Ni, x = 0 or 10) alloys
Authors: Rzącki Jakub , Świerczek Jan , Hasiak Mariusz , Olszewski Jacek , Zbroszczyk Józef , Ciurzyńska Wanda
Published: May 2015

As revealed by Mössbauer spectroscopy, replacement of 10 at.% of iron in the amorphous Fe70Mo5Cr4Nb6B15 alloy by cobalt or nickel has no effect on the magnetic structure in the vicinity of room temperature, although the Curie point moves from 190 K towards ambient one. In the early stages of crystallization, the paramagnetic crystalline Cr12Fe36Mo10 phase appears before α-Fe or α-FeCo are formed, as is confirmed by X-ray diffractometry and transmission electron microscopy. Creation of the crystalline Cr12Fe36Mo10 phase is accompanied by the amorphous ferromagnetic phase formation at the expense of amorphous paramagnetic one.
The role and position of iron in 0.8CaZrO3-0.2CaFe2O4
Authors: Szczerba Jacek , Śnieżek Edyta , Stoch Paweł , Prorok Ryszard , Jastrzębska Ilona
Published: May 2015

The aim of the study was to characterize the 0.8CaZrO3-0.2CaFe2O4 composite structure with particular emphasis on the role and position of iron in the function of sintering temperature. The paper presents the results of 57Fe Mössbauer effect at room temperature. It was found that the increase of sintering temperature causes an increase in the amount of incorporated iron ions in the CaZrO3-crystal structure. Based on Mössbauer spectroscopy analysis, it was found that three different environments of Fe3+ ions were observed in the obtained materials. Two of them corresponded to CaFe2O4 phase and one was associated with the substitution of Zr4+ by Fe3+ in the CaZrO3 structure.
Mössbauer spectroscopy study of 60P2O5-40Fe2O3 glass crystallization
Authors: Stoch Paweł , Stoch Agata
Published: May 2015

60P2O5-40Fe2O3 glass was synthesized and 57Fe Mössbauer spectroscopy study was presented. The main goal of the research was to investigate structural changes of local environment of iron ions during gradual crystallization of the glass. It was observed that some changes were evidenced at temperature of heat treatment higher than 400°C, above which content of tetrahedrally coordinated Fe3+ was increased in cost of octahedral sites. This led to formation of areas of nucleation of α-FePO4. Crystallization of α-Fe3(P2O7)2 and Fe2P2O7 was also observed.
Influence of annealing temperature on structural and magnetic properties of MnFe2O4 nanoparticles
Authors: Surowiec Zbigniew , Wiertel Marek , Gac Wojciech , Budzyński Mieczysław
Published: May 2015

Nanoparticles of manganese ferrite were obtained by the impregnation of highly ordered mesoporous MCM-41 silica support. The investigated sample contained 20% wt. Fe. The obtained nanocrystallites were strongly dispersed in silica matrix and their size was about 2 nm. The sample annealing at 500°C led to increase of particle size to about 5 nm. The Mössbauer spectroscopy investigations performed at room temperature show on occurrence of MnFe2O4 nanoparticle in superparamagnetic state for the sample annealed in all temperatures. The coexistence of superparamagnetic and ferromagnetic phase was observed at liquid nitrogen temperature. The sample annealed at 400°C and 500°C has bigger manganese ferrite particle and better crystallized structure. One can assign them the discrete hyperfine magnetic field components.
Iron-containing phases in fly ashes from different combustion systems
Authors: Szumiata Tadeusz , Gzik-Szumiata Małgorzata , Brzózka Katarzyna , Górka Bogumił , Gawroński Michał , Świetlik Ryszard , Trojanowska Marzena
Published: May 2015

The investigations of iron-containing phases existing in fly ashes were performed using transmission Mössbauer spectrometry. The examined samples of fly ashes were collected from different coal combustion systems, that is, stoker-fired boiler in municipal heating plant and pulverized coal boiler in power plant. Several phases are identified in the samples: iron oxides, paramagnetic aluminosilicate glass with Fe3+ ions and Al2O4-type spinel with Fe2+ ions. It was pointed out that proportions of contents of phases strongly depend not only on the combustion temperature but also on the way of ash collection.
On-the-Job Training and Human Resource Management: How to Improve Competitive Advantage of an Organization?
Authors: Ognjenović Kosovka
Published: May 2015

Background: In this paper, the effects of four groups of factors on organizational performance are examined. Those are human resource management (HRM) policies and practices, financial and business indicators, location, and firm characteristics. A review of selected literature confirmed that a similar set of factors, through its positive effects on boosting organizational performance, may significantly improve competitive advantage of firms.

Methods: An empirical analysis using firm-level data is conducted on the sample of enterprises operating in Serbia. A microeconometric approach is employed in order to specify and estimate empirical models. Two statistical models are applied. The ordered probit model is used for investigating organizational performance and the standard binary probit model for examining the decision of a firm to integrate the human resource development (HRD) department into its organizational structure. The goodness of fit measures confirmed the statistical reliability of estimated models.

Results: Estimation results revealed that optimization of the number of employees, sales and revenues, firm age, increased market demand and competitive environment, as well as the ‘right decisions’ of the top management have significantly positive effects on boosting organizational performance. Significance of on-the-job training for boosting organizational performance was not empirically supported. In the same group of factors are firm size, industry and region. An auxiliary model shown that large- and medium-sized firms, firms with high level of revenues, privately owned, foreign and those located in or near to the capital city are more likely to have HRD departments.

Conclusions: This paper provides a survey of the theoretical literature and explains empirical findings that are relevant for understanding to what extent on-the-job training, managing human resource, as well as some other internal and external organizational and financial factors are important for enhancing competitive advantage of firms.
With Nature and the Outdoors as a Resource:A Case of a One-Footed Elderly Man in a Wheelchair
Authors: Terese Linn
Published: May 2015

The older population is a greatly increasing group, and municipalities meet more and more demands regarding the health of elderly people. Ageing results in a loss of mobility and reduced independence, but there are different measures and practices possible that may contribute to maintain independence. By being active, elderly people can prevent disease, reduce disability, and increase wellness. Among these measures, research has discovered that older adults can benefit from contact with nature. This case study presents an old man in a wheelchair and his way of living an independent life despite being physically disabled. Harald is 88 years old and lives in the suburb of Ålesund, a town in Norway. Eight years ago, he had his left leg amputated due to cancer and experienced a long and tough recovery process. Harald‟s way back to restoring his mobility was highly enhanced by the outdoors and natural surroundings, which helped him to restore his independence. His experience, together with other theoretical findings, calls to our attention that nature is a resource on both the mental and the physical level. People who have access to nearby natural settings are healthier overall than other people. Natural surroundings lead one away from daily life and help one to forget about stress and worry. Natural surroundings make one more relaxed and offer a lot of time to reflect on life.
Reactivity of nano zero-valent iron in permeable reactive barriers
Authors: Pawluk Katarzyna , Fronczyk Joanna , Garbulewski Kazimierz
Published: May 2015

In this paper, the ability of nZVI to remove heavy metals (Cd, Cu, Ni, Pb, Zn) from multicomponent aqueous solutions was investigated through batch experiments. The experimental data were fitted to a second-order kinetic model based on solid capacity. The data for copper and lead fitted well into the second-order kinetic model, thus suggesting that the adsorption had a physical character. The values of the removal ratio and the second-order rate constant indicated that the order of adsorption priority of nZVI was as follows: Pb>Cu>Zn>Cd>Ni. The adsorption isotherm data were described by the most conventional models (Henry, Freundlich, and Langmuir). Equilibrium tests showed that copper and zinc were removed from the solution by adsorption processes, i.e., complexation and competitive adsorption. The test results suggested that the removal processes using nZVI are more kinetic than equilibrium. The study demonstrated that nZVI is favorable reactive material; however, comprehensive investigation should be performed for further in situ applications in PRB technology.
Hydrogen evolution reaction at Ru-modified nickel-coated carbon fibre in 0.1 M NaOH
Authors: Pierożyński Bogusław , Mikołajczyk Tomasz
Published: May 2015

The electrochemical activity towards hydrogen evolution reaction (HER) was studied on commercially available (Toho-Tenax) and Ru-modified nickel-coated carbon fibre (NiCCF) materials. Quality and extent of Ru electrodeposition on NiCCF tows were examined by means of scanning electron microscopy (SEM). Kinetics of the hydrogen evolution reaction were investigated at room temperature, as well as over the temperature range: 20-50°C in 0.1 M NaOH solution for the cathodic overpotential range: -100 to -300 mV vs. RHE. Corresponding values of charge-transfer resistance, exchange current-density for the HER and other electrochemical parameters for the examined fibre tow composites were recorded.
Evaluation of Patients' Satisfaction and Quality of Life in Selected Healthcare Institutions in Southern-Eastern Poland
Authors: Domańska-Glonek Ewa , Załuska Karolina , Oberc Monika , Lewicka Ewa , Torres Kamil , Torres Anna , Maciejewski Ryszard
Published: May 2015

Introduction. In recent times, patient outcome measurement has developed from being narrowly focussed upon levels of symptomatology and service use, to being a broader assessment of the impact of illness and treatment on the individual. Thus, it can be said that quality of life has become as significant as life expectance. This has brought about a transition in the assessment of treatment. Quality of life (QOL) is a multidimensional concept that usually includes subjective evaluations of both positive and negative aspects of life as it is being led. With regard to healthcare, a cross-sectional comparison of palliative care needs is crucial in understanding differences in the patients' quality of life. Hence, an analysis of programme implementation within different types of healthcare institutions is significant in evaluating current medical care standards. Our study analyzed the satisfaction level and quality of life of patients with Chronic Obstructive Pulmonary Disease (COPD), and after myocardial infarction (MI). Different types of healthcare institutions were evaluated.

Aim. To evaluate patients' satisfaction and quality of life in selected healthcare institutions in southern-eastern Poland.

Material and methods. The quality of life of patients with Chronic Obstructive Pulmonary Disease (COPD) was analyzed through the medical documentation obtained from different types of healthcare institutions. Among these are the pulmonary outpatient department in Moczary, as well as a GP Practice and a Nursing Home in this location. The quality of life of patients after myocardial infraction was analyzed through a survey study conducted at “Polonia” hospital spa in Rymanów Zdrój (the cardiology department).

Results and conclusions. The post-myocardial infarction incident patients had began to care more about their health condition and the quality of life they led. Moreover, their satisfaction level from received treatment and medical care indicated that the cardiological services implemented in southern-eastern Poland has proceeded in a good direction. Of note, these patients were systematically under specialist control. In contrast, among patients with COPD, only those under everyday care in the Nursing Home in Moczary received a similar systematic treatment, thus, COPD patients in Moczary lead a poor quality of life. This indicates a need to re-evaluate the current programmes and services provided by health care institutions in this region.
Vaccinations of Children Against Chickenpox and Pneumococcal Infection on the Example of Several Family Practice Physicians' Settings
Authors: Bednarek Anna , Mianowana Violetta
Published: May 2015

Introduction. Vaccinations against varicella and pneumococcal infection are an important form of prevention of infectious diseases and their possible complications.

Aim. Assessment of the vaccination control of children against varicella, and pneumococcal infection based on selected institutions of family practice physician.

Material and methods. There were verified 807 immunization cards of children from three vaccination offices, selected at random from the area of the southeastern Poland, i.e. the provinces of Lubelskie, Podkarpackie and Świêtokrzyskie. Based on the results of quantitative analysis of medical records of vaccination carried out in these institutions through 2007-2012, the number of children vaccinated against varicella, and pneumococcal infection was assessed.

Results. The largest number of vaccinated children (against pneumococcal infection - 148 children and 84 against varicella among 335 subjects reporting in the facility) was confirmed in health care unit in Lublin. In health care unit in Podkarpackie the number of vaccinated children against pneumococcal infection was 84 and against chicken pox - 52 among 256 children using the medical services. In health care unit in Świêtokrzyskie, 65 children were vaccinated against pneumococcal infection and 34 against varicella among 216 subjects reporting at the institution. The vast majority of these vaccines (431 - including three centers) was paid by parents.

Conclusions. 1. In all of the centers, a higher proportion of children was vaccinated against pneumococcal infection than chickenpox. 2. There was not a marked increase in the number of children vaccinated against varicella and pneumococcal infection during the analyzed period.
Iatrogenic Bile Duct Injury. A Significant Surgical Problem. Assessment of Treatment Outcomes in the Department's Own Material
Authors: Bobkiewicz Adam , Krokowicz łukasz , Banasiewicz Tomasz , Kościński Tomasz , Borejsza-Wysocki Maciej , Ledwosiński Witold , Drews Michał
Published: May 2015

Iatrogenic bile duct injuries (BDI) are still a challenging diagnostic and therapeutic problem. With the introduction of the laparoscopic technique for the treatment of cholecystolithiasis, the incidence of iatrogenic BDI increased.

was a retrospective analysis of 69 patients treated at the department due to iatrogenic BDI in the years 2004-2014.

. In this paper, we presented the results of a retrospective analysis of 69 patients treated at the Department due to iatrogenic BDI in the years 2004-2014. The data were analysed in terms of age, sex, type of biliary injury, clinical symptoms, the type of repair surgery, the time between the primary surgery and the BDI management, postoperative complications and duration of hospital stay.

. 82.6% of BDI occurred during laparoscopic cholecystectomy, 8.7% occurred during open cholecystectomy, whereas 6 cases of BDI resulted from surgeries conducted for other indications. In order to assess the degree of BDI, Bismuth and Neuhaus classifications were used (for open and laparoscopic cholecystectomy respectively). 84.1% of patients with confirmed BDI, were transferred to the Department from other hospitals. The average time between the primary surgery and reoperation was 6.2 days (SD 4). The most common clinical symptom was biliary fistula observed in 78.3% of patients. In 28 patients, unsuccessful attempts to manage BDI were made prior to the admission to the Department in other centres. The repair procedure was mainly conducted by laparotomy (82.6%) and by the endoscopic approach (15.9%). Hepaticojejunostomy was the most common type of reconstruction following BDI (34.7%).

. The increase in the rate of iatrogenic bile duct injury remains a challenging surgical problem. The management of BDI should be multidisciplinary treatment. Referring patients with both suspected and confirmed iatrogenic BDI to tertiary centres allows more effective treatment to be implemented.
Foreign Body in the Gastrointestinal Tract Leading to Small Bowel Obstruction - Case Report and Literature Review
Authors: Wnęk Bartosz , łożyńska-Nelke Aleksandra , Karoń Jacek
Published: May 2015

The presence of a foreign body in the gastrointestinal tract constitutes a common pathology, considering surgical clinical practice. The management of the ingestion of a foreign body depends on many factors. The study presented a case of a 33-year-old female patient subjected to surgical treatment, due to deliberate swallowing of a balloon. The above-mentioned was the amateur equivalent of intragastric balloon insertion, inducing weight loss. This is a rare cause of a foreign body ingestion, seldomly found in literature data. The patient reported to the Emergency Department on the second day after ingestion with symptoms of mechanical subobstruction, and after initial diagnostics, was qualified for surgery. The postoperative period proved uneventful. The study illustrated the often unfavourable access to false data on the internet, which may stimulate towards the above-mentioned behaviour.
The Relationship Between Biomechanical Indicators of the Snatch Technique and Female Weightlifters' Levels
Authors: Szyszka Paulina , Mastalerz Andrzej
Published: May 2015

Introduction
. The snatch technique is a discipline in Olympic weightlifting. The lifter has to raise the barbell from the platform directly above their head in one movement. While reviewing the literature on biomechanical analysis of the techniques of weightlifting, one can find positions on the analysis of parameters, such as barbell track, horizontal displacement, and angular positions of the joints in the individual phases of the lifter's movement. Many texts concern female and male lifters taking part in World or European Championships. The parameters of the best competitors are outlined - mostly those who finish in the top five places in competition. Mostly these are parameters regarding male lifters, and less frequently those of female lifters. In the literature review, an overlooked aspect is that of the definition of the diversity of indicators as regards the snatch technique practiced by female lifters depending on score.
Material and methods
. In the research, registered snatch attempts during the World Championship were used. Videos were used by judges to establish a maximum weight limit for female lifters. The attempts were registered by two cameras and were later digitally processed by the APAS 2000 system. Barbell parameters, maximum speed, average of the bar, and the parameters of the lifter-bar collocation (horizontal displacement of barbell weights and height elevation) were assessed.
Results
. The analysed attempts show the margin of error for measurement of the average speed of the barbell as 0.03 m/s. The difference in maximum speed of analysed attempts is 15%. The height of clearance of the first-placed female lifter's barbell was 12.7 cm, 30 cm for the last-placed.
Conclusions
. The sporting level of weightlifting by female lifters influences the analysed biomechanical indicators of the snatch. Those indicators, which are similar in the case of both the World Championship winner and the female lifter who came last, may be described as the average speeds of the barbell. The high sporting level of female lifters performing heavy lifting is characterized by the clearance of the barbell.