bluuebunny/crossref_metadata_2025_split huggingface dataset:
Prediction of precipitation deficit and excess in Bydgoszcz Region in view of predicted climate change/ Prognoza niedoboru i nadmiaru opadu w rejonie Bydgoszczy w świetle przewidywanej zmiany klimatu
Authors: Bąk Bogdan , Łabędzki Leszek 
Published: May 2015

Abstract
The paper presents the prediction of rainfall shortage and excess in Bydgoszcz region in the growing seasons (April-September) in 2011-2050 in the perspective of climate change. Based on the predicted monthly sum of precipitations for the percentile 50%, calculated by the regional climate model RM5.1 for Poland with boundary values taken from global model ARPEGE, a decrease in the amount of rainfall during the growing season by approximately 55 mm is predicted, compared to 1971-2000 taken as a reference period. The qualification of rainfall shortage and excess was made using the standardised precipitation index (SPI). According to the predicted values of SPI, the occurrence of 38 months of rainfall excess and 40 months of rainfall deficit in the period 2011-2050 is predicted. Dry months will constitute 16% of all months, wet months - 13%, and normal months - 71%. The occurrence of 13 several-month long periods of rainfall excess and 14 such periods of drought are predicted. The longest periods of both wet and dry weather will last 5 months. So long wet periods are expected in 2020, 2022 and 2031, and drought periods in 2017-2018, 2023-2024 and from 2046 to 2049.
Emissions of nitrogen and phosphorus into rivers from agricultural land – selected controversial issues/ Ładunki azotu i fosforu wprowadzane do rzek z terenów rolniczych – wybrane dyskusyjne problemy
Authors: Ilnicki Piotr 
Published: May 2015

Abstract
The research methodology for determining the sources of nutrients responsible for the eutrophication of rivers and seas, as well as the extent of their load in particular drainage basins, has for many years been at the centre of vigorous discussion. In the Oder and Vistula river basin, apart from the calculation of monthly and annual loads of nitrogen and phosphorus, based on the discharge and chemical monitoring data of waters, the MONERIS (Modeling Nutrient Emissions in River Systems) model has also been applied in determining nutrient sources. This article, on the basis of a comprehensive review of the professional literature, shall cast a critical eye over six issues that have been at the centre of past robust discussion: 1) determining the balance of N and P in agriculture, 2) the effects of a significant improvement in sewage treatment, 3) impact of technology on agriculture, 4) determination of nutrient retention in drainage basins, 5) impact of tile drainage practices on the leaching of nutrients, 6) as well as the accuracy of calculations made according to the MONERIS model. It would appear that for practical purposes it is sufficient to determine given loads of N and P from the drainage basins of particular rivers, as well as to adjust the above mentioned model, or indeed - resign from the unproven methodology of determining nutrient sources in rivers.
Optical Properties of Polish Lakes: The Secchi Disc Transparency
Authors: Borowiak Dariusz 
Published: May 2015

Abstract
The spatial variation of water transparency of the largest Polish lakes was presented on the basis of documentary material collected by the Voivodeship Inspectorates for Environment Protection as well as university geography departments in the period of 1991-2013. Seasonal results of the Secchi disc measurements (spring, summer) for 706 lakes were gathered. This is more than 68% of the total number of Polish lakes with a surface area larger than 50 ha. The mean water transparency of these lakes was 1.87 m, while the median was 1.58 m. Distinct inter-regional differences of the Secchi disc transparency were found, and it was also possible to distinguish three relatively homogeneous groups of macroregions where lakes have different optical characteristics. They can be divided into areas with lakes with high (3.05 m), medium (1.99-2.11 m) and low (1.22-1.52 m) water transparency. The Secchi disc transparency of these lakes was also analysed in relation to concentration values of the main forms of the optically significant constituents of water (coloured dissolved organic matter, suspended matter). The mean transparency of turbid, stained and clear lakes was, respectively, 1.16, 2.02, and 2.92 m. Moreover, regional empirical models to predict Secchi disc transparency from chlorophyll a concentration were also developed. It was assumed that inter-regional differences between models could be due to the probably different time of the ice sheet recession. The influence of the lake morphometry was most fully reflected in the impact of the depth conditions.
Factors controlling sedimentation in the Toruń-Eberswalde ice-marginal valley during the Pomeranian phase of the Weichselian glaciation: an overview
Authors: Pisarska-Jamroży Małgorzata 
Published: May 2015

Abstract
During the Pleistocene the Scandinavian ice sheet drained huge quantities of sediment-laden meltwaters. These meltwaters supplied ice-marginal valleys that formed parallel to the front of the ice sheet. Not without significance was the supply of ice-marginal valleys from extraglacial rivers in the south. Moreover, periglacial conditions during and after sedimentation in ice-marginal valleys, the morphology of valley bedrocks, and erosion of older sediments played important roles in the depositional scenarios, and in the mineralogical composition of the sediments. The mechanisms that controlled the supply and deposition in ice-marginal valleys were analysed on the basis of a Pleistocene ice-marginal valley that was supplied by northern and southern source areas in the immediate vicinity. Investigations were conducted in one of the largest ice-marginal valleys of the Polish-German lowlands, i.e., the Toruń-Eberswalde ice-marginal valley, in sandurs (Drawa and Gwda) supplied sediments and waters from the north into this valley, and on extraglacial river terraces (pre-Noteć and pre-Warta rivers), formed simultaneously with the sandurs and ice-marginal valley (Pomeranian phase of Weichselian glaciation) supplied sediments and waters from the south into this valley. A much debated question is how similar, or different, depositional processes and sediments were that contributed to the formation of the Toruń-Eberswalde ice-marginal valley, and whether or not it is possible to differentiate mostly rapidly aggraded sandur sediments from ice-marginal valley sediments. Another question addresses the contribution of extraglacial feeding of the Toruń-Eberswalde ice-marginal valley. These matters were addressed by a wide range of analyses: sediment texture and structure, architectural elements of sediments, frequency of sedimentary successions, heavy-mineral analysis (both transparent and opaque heavy minerals), analysis of rounding and frosting of quartz grains, and palaeohydrological calculations. Additionally, a statistical analysis was used. The specific depositional conditions of distribution of sediments in ice-marginal valley allow to distinguish new environment of ice-marginal valley braided river. The spectrum of depositional conditions in the Toruń-Eberswalde ice-marginal valley and their specific palaeohydraulic parameters allow to distinguish three coexisting zones in the ice-marginal valley braided-river system: (1) deep gravel-bed braided channel zone with extensive scours, (2) deep sand-bed braided channel zone with transverse bars, and (3) marginal sand-bed and gravel-bed braided channel zone with diamicton and breccia deposition, which were characterised in detail. Some of the results have been published previously, which is why they are discussed in the present paper within the context of new data
Sail-Type Wind Turbine for Autonomous Power Supplay: Possible Use in Latvia
Authors: Sakipova S. , Jakovics A. 
Published: May 2015

Abstract
Under the conditions of continuous increase in the energy consumption, sharply rising prices of basic energy products (gas, oil, coal), deterioration of environment, etc., it is of vital importance to develop methods and techniques for heat and power generation from renewables. The paper considers the possibility to use a sail-type wind turbine for autonomous power supply in Latvia, taking into account its climatic conditions. The authors discuss the problems of developing a turbine of the type that would operate efficiently at low winds, being primarily designed to supply power to small buildings and farms distant from centralized electricity networks. The authors consider aerodynamic characteristics of such a turbine and the dependence of the thrust moment of its pilot model on the airflow rate at different angles of attack. The pilot model with a changeable blade shape has been tested and shows a good performance.
Do Fathers Matter: Influencing Neural Phenotypes Through Non-Genetic Transmission of Paternal Experiences?
Authors: Hehar Harleen , Mychasiuk Richelle 
Published: May 2015

AbstractUnderstanding the role of fathers and how paternal experiences actually influence offspring outcomes is a rapidly growing field of research. This Lamarkian mode of inheritance offers offspring an additional mechanism for environmental adaptation that can occur in a single generation, rather than waiting for chance mutations in DNA that may or may not increase an individual’s chances for survival. This review article examines the influences of many paternal experiences including, stress, drugs, and alcohol, along with enrichment, exercise, diet and paternal age, on offspring neural phenotypes. Where possible, there is also discussion of the underlying mechanisms that facilitate the transmission of these experiences to the offspring. Although previous ideologies maintained a small role for fathers (merely as sperm-donors) in the developmental trajectories of the offspring they sired, research now demonstrates that they influence a wide range of outcomes such as drug and alcohol tolerance, susceptibility to mental illness, and patterning of the hypothalamicpituitary- adrenal (HPA) stress response. These novel findings emphasize the complexity and extensive realm of factors that can influence the development of offspring neural phenotypes.
Review on origin of the unusual high-Tc superconductivity in Ca1−xRExFe2As2 (RE = La, Ce, Pr, Nd)
Authors: Zhou W. , Shi Z. X. 
Published: May 2015

AbstractSince the discovery of high temperature superconductivity in iron pnictides in 2008, many iron-based superconductors (IBSs) with various crystal structures have been exploited.Among them, superconductivity with the onset transition temperature T
Mobility of interacting inorganic nanoparticles
Authors: Dziedzic-Kocurek Katarzyna , Fornal Piotr , Stanek Jan 
Published: May 2015

Abstract
The mobility of the 110 nm-Fe2O3 particles in a viscous sucrose solution depends on the concentration of the nanoparticles. When the average particle–particle nearest neighbor distance <r> is less than 250 nm, the particle interaction slows down their mobility. When <r> is more than 170 nm, the small mobility of nanoparticles does not depend on their concentration. The critical distance is approximately equal to 2Rh
= 260 nm, where Rh
is the hydrodynamic radius, determined by the dynamic light scattering (DLS) method.
Temperature dependence of the short-range order parameter for Fe0.90Cr0.10 and Fe0.88Cr0.12 alloys
Authors: Idczak Rafał , Konieczny Robert 
Published: May 2015

Abstract
The 57Fe Mössbauer spectra for the iron-based solid solutions Fe0.90Cr0.10 and Fe0.88Cr0.12 were measured at different temperatures ranging from 300 K to 900 K. Analysis of the obtained spectra shows that the distribution of impurity atoms in the two first coordination shells of 57Fe nuclei is not random and it cannot be described by the binomial distribution. Quantitatively, the effects were described in terms of the atomic short-range order (SRO) parameters and the pair-wise interaction energy with the help of a quasi-chemical type formulation introduced by Cohen and Fine. The obtained results reveal strong clustering-type correlations in the studied samples (a predominance of Fe-Fe and Cr-Cr bonds). Moreover, the changes in SRO values observed during thermal processing suggest that the distribution of Cr atoms in an α-iron matrix is strongly temperature dependent.
Structure and some magnetic properties of (BiFeO3)
x
-(BaTiO3)1−x
solid solutions prepared by solid-state sintering
Authors: Kowal Karol , Kowalczyk Maciej , Czekaj Dionizy , Jartych Elżbieta 
Published: May 2015

Abstract
This paper presents the results of the study on structure and magnetic properties of the perovskite-type (BiFeO3)
x
-(BaTiO3)1−

x
solid solutions. The samples differing in the chemical composition (x = 0.9, 0.8, and 0.7) were produced according to the conventional solid-state sintering method from the mixture of powders. Moreover, three different variants of the fabrication process differing in the temperatures and soaking time were applied. The results of X-ray diffraction (XRD), Mössbauer spectroscopy (MS), and vibrating sample magnetometry (VSM) were collected and compared for the set of the investigated materials. The structural transformation from rhombohedral to cubic symmetry was observed for the samples with x = 0.7. With increasing of BaTiO3 concentration Mössbauer spectra become broadened reflecting various configurations of atoms around 57Fe probes. Moreover, gradual decreasing of the average hyperfine magnetic field and macroscopic magnetization were observed with x decreasing.
Subsurface structure and magnetic parameters of Fe-Mo-Cu-B metallic glass
Authors: Miglierini Marcel , Hasiak Mariusz , Bujdoš Marek 
Published: May 2015

Abstract
Subsurface properties of 57Fe81Mo9Cu1B9 metallic glass were studied by conversion electron and conversion X-ray Mössbauer spectrometry. They were applied to both surfaces of the ribbons. Deviations in structural surface features are exhibited via different contents of crystalline phases, which were identified as bcc-Fe and magnetite. The presence of small ferromagnetic particles was also suggested from magnetic measurements. An influence of irradiation with 130-keV N+ ions on surface properties of the as-quenched alloy is also discussed.
Validation of the method for determination of plutonium isotopes in urine samples and its application in a nuclear facility at Otwock
Authors: Rzemek Katarzyna , Czerwiński Andrzej , Dymecka Małgorzata , Ośko Jakub , Pliszczyński Tomasz , Haratym Zbigniew 
Published: May 2015

Abstract
The studies aimed at determining low activities of alpha radioactive elements are widely recognized as essential for the human health, because of their high radiotoxicity in case of internal contamination. Some groups of workers of nuclear facility at Otwock are potentially exposed to contamination with plutonium isotopes. For this reason, the method for determination of plutonium isotopes has been introduced and validated in Radiation Protection Measurements Laboratory (LPD) of the National Centre for Nuclear Research (NCBJ). In this method the plutonium is isolated from a sample by coprecipitation with phosphates and separated on a AG 1-X2 Resin. After electrodeposition, the sample is measured by alpha spectrometry. Validation was performed in order to assess parameters such as: selectivity, accuracy (trueness and precision) and linearity of the method. The results of plutonium determination in urine samples of persons potentially exposed to internal contamination are presented in this work.
Minor actinides impact on basic safety parameters of medium-sized sodium-cooled fast reactor
Authors: Darnowski Piotr , Uzunow Nikolaj 
Published: May 2015

Abstract
An analysis of the influence of addition of minor actinides (MA) to the fast reactor fuel on the most important safety characteristics was performed. A special emphasis was given to the total control rods worth in order to describe qualitatively and quantitatively its change with MA content. All computations were performed with a homogeneous assembly model of modified BN-600 sodium-cooled fast reactor core with 0, 3 and 6% of MA. A model was prepared for the Monte Carlo neutron transport code MCNP5 for fresh fuel in the beginning-of-life (BOL) state. Additionally, some other parameters, such as Doppler constant, sodium void reactivity, delayed neutron fraction, neutron fluxes and neutron spectra distribution, were computed and their change with MA content was investigated. Study indicates that the total control rods worth (CRW) decreases with increasing MA inventory in the fuel and confirms that the addition of MA has a negative effect on the delayed neutron fraction.
The Influence of Social Networking Sites on Recruiting Human Resources in the Czech Republic
Authors: Bohmova Lucie , Pavlicek Antonin 
Published: May 2015

Abstract

Background: This paper is focused on the usage of social networking sites (SNS) for human resources departments in the process of hiring new employees. It also maps the development and influence of SNS on recruiter's behavior and customs. The main aim is to find out, whether SNS could/will replace traditional online job boards in the Czech Republic. The motivation for the research is to determine whether SNS can be used for serious and practical business purposes.

Methods: The paper presents authors’ empirical research with two interconnected instruments used for data collection: (1) Questionnaire with 15 questions devoted to usability, evaluation and comparison of SNS with job portals (N=286 HR specialists) and (2) Comparison of 3 online job advertising methods – job portals, SNS and business website.

Results: HR specialists regularly use publicly available information on candidates’ Facebook profiles. Similar results have been observed using both instruments. SNS's in the Czech Republic are not yet used by recruiters as the main tool for recruitment, however, are often used as a support tool for decision making in the final stage of recruitment. Use of SNS's by recruiters is universal; we have not found any significant differences in terms of demographics (men, women, old, young HR professionals). The rate of utilization of SNS's by recruiters in the Czech Republic is gradually increasing, but does not reach the US level.

Conclusion: Our findings confirm the rising importance of social networking sites (SNS) usage as a new recruiting technology. However, as a major player in the field of recruitment, job boards (eg. Jobs.cz) are still important. However, the expectation is that in the near future, this will change and SNS‘s may replace the job boards.
Students’ Perception of HR Competencies
Authors: Novak Vesna , Žnidaršič Anja , Šprajc Polona 
Published: May 2015

Abstract

Background and purpose: Human resource professionalism receives considerable attention in terms of the competence of individual. In this article, we want to bridge the existing competencies of students and the perceived competencies that they assume will be developed and obtained during their studies. The purpose of our paper is a) to present competencies in general, b) to determine the meaning of the development of competencies in the field of higher education, and c) to present the role of competencies in human resource management. The aim of this paper is to examine the human resource competencies among students, and their judgments regarding the competencies they have already received during their studies.

Methodology: The questionnaire was distributed to full-time students of the Faculty of Organizational Science, University of Maribor, in such a way that both genders, both undergraduate and graduate studies, and all years of study were represented. We have measured students’ opinions concerning their current and future perceptions about professional competencies in the HR field.

Results: Based on the self-assessment of fifteen HR competencies, we used hierarchical clustering performed with Ward's method and standardized variables and got two clusters. A t-test was used according to low or high levels of students’ current competencies. The positive association between satisfaction with study programme and student's opinion on development of competencies during their studies was confirmed with one-tailed Pearson correlation coefficient.

Conclusion: The majority of students believe that they possess significant HR competencies. They have expressed a need for further education and training in that field. The students have assessed that the study programme allows them to acquire and develop the competencies for a successful task performance of the HR professional.
Sport for All Frail Bodies
Authors: Jespersen Ejgil 
Published: May 2015

Abstract
Sport for All is a universal Olympic idea adopted by supranational institutions such as the Council of Europe, UNESCO, and the UN. Measures that need to be taken to ensure that all people have an equal opportunity to be included in sport are analyzed and discussed based upon a survey of sports and exercise participation in Denmark with a special focus upon people with impairments. The prevailing point of view is a special needs approach to sports participation, whether it is oriented towards separate or integrated forms of organization. It is often unclear whether this approach is aiming for equality of outcome, equality of chance or just a minimum threshold for sports and exercise activity. However, if we adopt a universal approach to Sport for all, then the focus is not on differences among people, but upon the commonalities among human beings in light of their diversity. This approach is associated with the understanding of “universal design” in the UN‟s Convention of the Rights of Persons with Disabilities and the WHO‟s International Classification of Functioning, Disability, and Health. In conclusion, it is highlighted that a more inclusive Sport for All movement is preferable to a segregated or integrated disability sport, provided the persons concerned have a say in every case.
Effect of TiO2-ZnO/GAC on by-product distribution of CVOCs decomposition in a NTP-assisted catalysis system
Authors: Abedi Kamaladdin , Ghorbani-Shahna Farshid , Bahrami Abdolrahman , Jaleh Babak , Yarahmadi Rasoul 
Published: May 2015

Abstract
In this study, the catalytic effect of TiO2-ZnO/GAC coupled with non-thermal plasma was investigated on the byproducts distribution of decomposition of chlorinated VOCs in gas streams. The effect of specific input energy, and initial gas composition was examined in a corona discharge reactor energized by a high frequency pulsed power supply. Detected by-products for catalytic NTP at 750 J L-1 included CO, CO2, Cl2, trichloroacetaldehyde, as well as trichlorobenzaldehyde with chloroform feeding, while they were dominated by CO, CO2, and lower abundance of trichlorobenzaldehyde and Cl2 with chlorobenzene introduction. Some of the by-products such as O3, NO, NO2, and COCl2 disappeared totally over TiO2-ZnO/GAC. Furthermore, the amount of heavy products such as trichlorobenzaldehyde decreased significantly in favor of small molecules such as CO, CO2, and Cl2 with the hybrid process. The selectivity towards COx soared up to 77% over the catalyst at 750 J L-1 and 100 ppm of chlorobenzene.