bluuebunny/crossref_metadata_2025_split huggingface dataset:
Prekonávanie rozdielov systému riadenia, správy a organizácie národného školstva v medzivojnovom Československu
Authors: Dobrocká Soňa 
Published: August 2016

Štúdia na základe analýzy primárnych prameňov sleduje genézu a vývoj systému organizácie slovenského národného školstva v období prvej Československej republiky (1918 – 1939) pod vplyvom centrálnych orgánov riadenia školstva. Vysvetľuje a objasňuje proces unifikácie národného školstva, ktorého charakteristikou bola úprava slovenských pomerov po vzore predvojnovej rakúskej ríšskej legislatívy platnej na území Čiech, Moravy a Sliezska. Kľúčové slová: československé školstvo, školská legislatíva, školský systém, unifikácia, povinná školská dochádzka
HPLC Enantioseparation of Phenylcarbamic Acid Derivatives by Using Macrocyclic Chiral Stationary Phases
Authors: Hroboňová Katarína , Lehotay Jozef , Čižmárik Jozef 
Published: August 2016

Abstract The HPLC by using chiral stationary phases based on macrocyclic antibiotics, dimethylphenyl carbamate cyklofructan 7 and β-cyclodextrin in terms of polar-organic separation mode (mobile phase methanol/acetonitrile/acetic acid/triethylamine) were used for enantioseparation of alkoxy derivatives of phenylcarbamic acid. The effect of the analyte structures on the efficiency of enantioseparation was investigated. The most suitable stationary phase was teicoplanin aglycone, where the separations of the enantiomers were obtained (the resolution value from 0.65 to 2.90, depending on the structure of the analyte). Significant effect on the resolution of the enantiomers has position of alkoxy substituent in the hydrophobic part of the molecule. The enantiorecognition was achieved for 3-alkoxysubstituted derivatives.
Pyrolysis Products as Soil Fertilizers: Screening of Potentially Hazardous Aromatic Compounds
Authors: Frišták Vladimír , Graser Marion , Pipíška Martin , Micháleková-Richveisová Barbora , Soja Gerhard 
Published: August 2016

Abstract This study investigated the concentrations of polycyclic aromatic hydrocarbons (PAHs) in pyrogenic carbonaceous materials (PCM) produced from three waste materials during slow pyrolysis at 400 and 500°C. As feedstocks bone meal (BM), biogas slurry (BC) and chicken manure (CM) were used. As potentially problematic substances 1- and 2- methylnaphthalene were analysed as indicators for methylated hydrocarbons in pyrolysis products. The phytotoxic effect of soil amendments was evaluated by a standard cress germination test with Lepidium sativum L. The analysis showed higher concentrations of the sum of 16 US-EPA PAHs in samples produced at lower temperature and in samples produced from biogas slurry. Concentrations of 1- and 2-methylnaphthalene showed similar trends with concentrations in a range of 35-205% of the sum of 16 PAHs. Germination tests showed inhibition effects of products from biogas slurry when applied in concentrations of ≥ 10 % to standard substrate. Apparently pyrolysis of biogas slurry requires special attention to avoid accumulation of PAHs and methylated naphthalenes.
High-throughput fabrication and calibration of compact high-sensitivity plasmonic lab-on-chip for biosensing
Authors: Gazzola E. , Pozzato A. , Ruffato G. , Sovernigo E. , Sonato A. 
Published: August 2016

AbstractSurface plasmon resonance biosensors have recently known a rapid diffusion in the biological field and a large variety of sensor configurations is currently available. Biological applications are increasingly demanding sensor miniaturization, multiple detection in parallel, temperature-controlled environment and high sensitivity. Indeed, versatile and tunable sensing platforms, together with an accurate biological environment monitoring, could improve the realization of custom biosensing devices applicable to different biological reactions. Here we propose a smart and high throughput fabrication protocol for the realization of a custommicrofluidic plasmonic biochip that could be easily tuned and modified to address different biological applications. The sensor chip here presented shows a high sensing capability, monitored by an accurate signal calibration in the presence of concentration and temperature variation.
Antibacterial Efficiency of Hydroxyapatite Biomaterials with Biodegradable Polylactic Acid and Polycaprolactone Polymers Saturated with Antibiotics / Bionoārdāmu Polimēru Saturošu Un Ar Antibiotiskajām Vielām Piesūcinātu Biomateriālu Antibakteriālās Efektivitātes Noteikšana
Authors: Kroiča Juta , Skadiņš Ingus , Salma Ilze , Reinis Aigars , Sokolova Marina , Rostoka Dagnija , Bērza Natālija 
Published: August 2016

Abstract
Infections continue to spread in all fields of medicine, and especially in the field of implant biomaterial surgery, and not only during the surgery, but also after surgery. Reducing the adhesion of bacteria could decrease the possibility of biomaterial-associated infections. Bacterial adhesion could be reduced by local antibiotic release from the biomaterial. In this in vitro study, hydroxyapatite biomaterials with antibiotics and biodegradable polymers were tested for their ability to reduce bacteria adhesion and biofilm development. This study examined the antibacterial efficiency of hydroxyapatite biomaterials with antibiotics and biodegradable polymers against Staphylococcus epidermidis and Pseudomonas aeruginosa. The study found that hydroxyapatite biomaterials with antibiotics and biodegradable polymers show longer antibacterial properties than hydroxyapatite biomaterials with antibiotics against both bacterial cultures. Therefore, the results of this study demonstrated that biomaterials that are coated with biodegradable polymers release antibiotics from biomaterial samples for a longer period of time and may be useful for reducing bacterial adhesion on orthopedic implants.
Synthesis of ordered mesoporous uranium dioxide by a nanocasting route
Authors: Zhao Ran , Wang Lin , Chai Zhi-Fang , Shi Wei-Qun 
Published: August 2016

Abstract
Ordered mesoporous UO2 with 3-D structure (for UO2-KIT-6) and nanowire bundles (for UO2-SBA-15) was synthesized for the first time by a nanocasting route using different ordered mesoporous silica (KIT-6 and SBA-15, respectively) as templates and uranyl nitrate hexahydrate as the metal precursor. The uranyl nitrate was impregnated into the mesopore of the silica template and was converted to U3O8 after the first step. The synthesis of ordered UO2 mesostructure was achieved by reducing the mesoporous U3O8 with silica composites under 5% H2/Ar atmosphere at 700°C, followed by a template removal process. The as-prepared UO2-KIT-6 had a particle size of several millimeters, and was constructed with uncoupled subframework mesostructure and crystalline walls, while UO2-SBA-15 possessed a rope-like morphology and consisted of nanowire arrays. The surface area and pore volume of ordered UO2 mesostructure are 47.2 m2 g−1 and 0.23 cm3 g−1 for the UO2-KIT-6, and 54.4 m2 g−1 and 0.28 cm3 g−1 for the UO2-SBA-15, respectively.
Behavior of Cs in Grimsel granodiorite: sorption on main minerals and crushed rock
Authors: Eveliina Muuri , Jussi Ikonen , Minja Matara-aho , Antero Lindberg , Stellan Holgersson , Mikko Voutilainen , Marja Siitari-Kauppi , Martin Andrew 
Published: August 2016

Abstract
In this study the sorption of cesium was investigated on four different minerals; quartz, plagioclase, potassium feldspar and biotite as well as granodiorite obtained from the Grimsel test site in Switzerland. The experiments were conducted in the presence of the weakly saline Grimsel groundwater simulant by determining the distribution coefficients using batch sorption experiments and PHREEQC-modelling across a large concentration range. In addition, the purity of the minerals was measured byXRDand the specific surface areas by BET method using krypton. The distribution coefficients of cesiumwere largest on biotite (0.304±0.005 m3/kg in 10-8 M). Furthermore, the sorption of cesiumon quartzwas found to be negligibly small in all investigated concentrations and the sorption of cesium on potassium feldspar and plagioclase showed similar behavior against a concentration isotherm with distribution coefficients of 0.0368±0.0004 m3/kg and 0.18±0.04 m3/kg in 10-8 M. Finally, cesium sorption behavior on crushed granodiorite followed the trend of one of its most abundant mineral, plagioclase with distribution coefficient values of 0.107±0.003 m3/kg in 10-8 M. At low concentrations (<1.0·10-6 M) cesiumwas sorbed on the frayed edge sites of biotite and once these sites are fully occupied cesium sorbs additionally to the Type II and Planar sites. As a consequence, the sorption of cesium on biotite is decreased at concentrations >1.0·10-6 M. Secondly cesium sorption on potassium feldspar and plagioclase showed similar non-linear behavior with varying concentration. The results were used to assist the interpretation of cesium diffusion process in the 2.5 year in-situ experiment carried out in the underground laboratory at Grimsel test site in Switzerland (2007–2009).
Crista galli sinusitis – a radiological impression or a real clinical entity
Authors: Manea Claudiu , Mladina Ranko 
Published: August 2016

Abstract
BACKGROUND. Crista galli is an anatomical structure localized in the midline, that derives from the ethmoid bone, with a compact bone structure, sometimes pneumatized. The connection between the pneumatized crista galli and the adjacent paranasal structures is usually performed through an opening similar with a sinusal ostium.
MATERIAL AND METHODS. We performed a retrospective clinical study about the incidence of the pneumatization of crista galli in 196 patients with chronic sinusitis. We evaluated the degree of pneumatization and the drainage pathways of crista galli, trying to correlate the radiological findings with the symptomatology of the patients with crista galli “sinusitis”.
RESULTS. Pneumatization of crista galli was found in 30.1% of cases. From 59 patients with chronic rhinosinusitis and pneumatized crista galli, 66.4% had no opacification, 23.7% various degrees of opacification and 11.9% showed complete opacification. The presence of an opening of the pneumatized crista galli into surrounding air-cells was found in 16.98% of the patients. Headache was encountered in 76.2% of the patients with CRS and pneumatized crista galli sinusitis.
CONCLUSION. When analyzing a CT scan of a patient with CRS, we should also take into consideration the pneumatization of crista galli, which has a high variability. Most of the patients included in our study had also a certain degree of opacification of the pneumatized crista galli. Headache had a higher incidence in patients with crista galli inflammation than in CRS patients who showed no pneumatization or opacification of the crista galli (76.2% versus 60.5% in “simple” CRS patients).
Variability of suspended sediment grain size distribution in winter floods
Authors: Hejduk Agnieszka , Hejduk Leszek 
Published: August 2016

Abstract
Variability of suspended sediment grain size distribution in winter floods. The work presents the results of research concern variability of suspended sediment grain size, transported during the winter floods in agricultural catchment, in the period of hydrological years 2012-2015. The information about grain size distribution from nine winter flood events were collected over the study period, which allowed to analyze the variability of suspended sediment particle size during the various events. Grain size of sediment was determined using a laser particle size analyzer Mastersizer Microplus from Malvern Instruments Ltd. Variability of individual particle size classes were observed in each flood. Sand fraction dominated in seven of nine measured events. There was no significant increase of suspended sediment size in relation to the maximum of discharge. It can be explain by a relatively low discharge of recorded events. The percentage of material classified as clay (<4 μm) ranged from 0.08 to 1.01%, silt-sized material (>4 and <63 μm) ranged between 9.31 and 67.17% and sand-size material (>63 μm) ranged from 32.01 to 90.61%. The relationship between the particle size and the discharge requires further studies. The diameter d10, d50 and d90 and a standard deviation were calculated for each flood. Mean values of d50 for individual flood ranged between 41.05 and 191.32 μm with average value of 99.01 μm and average standard deviation of 32.57.
Tibouchina papyrus (Pohl) Toledo, 1952 (Melastomataceae): distribution extension to the northern part of Brazilian Cerrado
Authors: Maracahipes Leandro , Cianciaruso Marcus Vinicius , Lenza Eddie , Pinto José Roberto Rodrigues , Marimon Beatriz Schwantes , Dos Santos Tassiana Reis Rodrigues 
Published: August 2016

New records of Tibouchina papyrus for Mato Grosso State extend its distribution in the northern part of the Brazilian Savanna, contributing to the conservation of this species and the areas in which it occur.
PEMBELAJARAN MATEMATIKA MENGGUNAKAN CD INTERAKTIF AMT BERBASIS LECTORA INSPIRE UNTUK SISWA SD
Authors: Sukamto - , Wardani Asry Kusuma 
Published: August 2016

<em>The purpose of this research is consider the effectivness of mathematic learning using lectora inspire based interactive CD in primary school. This research is a research and development with design ADDIE. The validity of he return products developed by votes validator media experts and material to obtain a valid criterion. Products in the validation by experts and the media matter experts, and then tested. Sample test was grade 4 students of elementary school Tandang 01 Semarang. Results of the media validation analysis experts the average percentage of media ideals, respectively for 68.00% and 89.58%. Results of the validation analysis matter experts the average percentage of media ideals, respectively for 74.67% and 90.42%, and the response to all students in grade IV B of elementary school of Tandang 01 Semarang by 87.64%. Based on the test results are known t­<sub>0</sub> t over t<sub>table </sub>(9.056&gt; 2.030). Differences in student learning outcomes before and after being treated was 59%. From the analysis, AMT interactive CD categorized as very good. So it can be applied in teaching.</em>
Prognostic relevance of hyponatremia after first-ever ischemic stroke
Authors: Kret Bartłomiej , Holecki Michał , Lasek-Bal Anetta , Hawrot-Kawecka Anna , Wilczyński Krzysztof , Duława Jan 
Published: August 2016

WstępHiponatremię uważa się za czynnik ryzyka udaru mózgu.Materiał i metodyPrzeanalizowano 677 chorych z pierwszym w życiu udarem niedokrwiennym mózgu, których podzielono w zależności od stężenia sodu w surowicy na dwie podgrupy: ≤ 135 mmol/l i > 135 mmol/l.WynikiU chorych ze stężeniem sodu ≤ 135 mmol/l mediana w skali NIHSS wyniosła 5 pkt, mediana oceny stopnia inwalidztwa według skali mRankin wynosiła 4 pkt, a śmiertelność w okresie jednego miesiąca od zachorowania wynosiła 10,5%, w grupie ze stężeniem sodu > 135 mmol/l stwierdzono odpowiednio: 3 pkt, 2 pkt, i 3,4%. U chorych z hiponatremią śmiertelność w ciągu miesiąca od zachorowania wynosiła u kobiet 16,4%, u mężczyzn 3,5% (p = 0,0194). U kobiet z prawidłową natremią obserwowano większy stopień inwalidztwa w skali mRankin (p = 0,005).WnioskiHiponatremia ma niekorzystny wpływ na stan pacjentów zarówno w ostrej, jak i podostrej fazie udaru oraz wiąże się ze zwiększoną śmiertelnością miesięczną od zachorowania. Kobiety z hiponatremią cechowała większa śmiertelność w ciągu jednego miesiąca po przebytym pierwszym w życiu udarze niedokrwiennym. U kobiet z prawidłowym stężeniem sodu w czasie pierwszego w życiu udaru niedokrwiennego stwierdzano wyższy stopień inwalidztwa ocenianego w skali mRankin w porównaniu z mężczyznami.
Prediction of Soil Carbon in the Conterminous United States: Visible and Near Infrared Reflectance Spectroscopy Analysis of the Rapid Carbon Assessment Project
Authors: Wijewardane Nuwan K. , Ge Yufeng , Wills Skye , Loecke Terry 
Published: August 2016

Core Ideas
We modeled ∼20,000 samples in RaCA from conterminous US to predict OC TC with VisNIR.
We developed local models by four variables: RaCA Region, Land Use, Horizon, and Texture.
We compared local models with the global models and PLSR versus ANN.
ANN models outperform PLSR in global models, but local models improve substantially in PLSR.
Overall, local PLSR models developed from Horizon and Texture are most favorable
Visible and near infrared reflectance spectroscopy (VisNIR) has been used across a number of spatial scales to predict soil organic carbon (OC) content. The Rapid Carbon Assessment Project (RaCA) is a nationwide project that collected 144,000+ soil samples from across the conterminous United States for C stock mapping using VisNIR. The objective of this study was to calibrate and validate the VisNIR soil OC and total C (TC) models with ∼20,000 samples from RaCA. Models were developed with either partial least squares regression (PLSR) or the Artificial Neural Network (ANN) model. Four auxiliary variables—RaCA Region, Land Use Land Cover, Master Horizon, and Textural Class—were tested to stratify the dataset and to develop local models. The results showed that OC and TC models calibrated with ANN (R2 > 0.94; RPD > 4.0) outperformed those of PLSR (R2 = 0.83; RPD = 2.4). For PLSR, local models developed with all four auxiliary variables exhibited improvement in prediction accuracy, and the improvement was only marginal for ANN models. Master Horizon and Textural Class appeared to be more effective in stratifying samples into homogeneous groups because they gave an overall lower root mean squared error of prediction (RMSEP) for the validation samples. For the majority of the local Textural Class models, the RMSEP of OC prediction ranged from 0.5 to 1.5%. To maximize the applicability of the RaCA spectral library on external soil samples, PLSR local models developed from Master Horizon or Textural Class appeared to be more favorable.
Influence of auxetic foam in quasi-static axial crushing
Authors: Mohsenizadeh Saeid , Alipour Roozbeh , Ahmad Zaini , Alias Amran 
Published: August 2016

Abstract
This paper treats the influence of auxetic foam on the crush response and energy absorption response of square-section tubes when subjected to uniaxial quasi-static loading. The study aims at quantifying the energy absorption capability of auxetic foam-filled square tubes for variations in wall thickness, initial height, aspect ratio and slenderness ratio of the tube. The capability of simulating the crush response of auxetic foam-filled tubes using the validated numerical models is also presented. Based on the experimental results, the influence of the auxetic foam in the thin-walled square tubes was quantified in terms of energy absorption capacity, specific energy absorption and crush force efficiency. It is evident that a thicker tube filled with auxetic foam is preferable if the energy absorption level is the primary goal, yet this compromises the crush force efficiency. The outcome of this present study is the establishment of empirical models for estimating the quasi-static crushing response of auxetic foam-filled tubes with varying slenderness ratio and aspect ratio.
Experimental investigation of phase equilibria in the Co–Ni–Zr ternary system
Authors: Liu Xingjun , Yang Shuiyuan , Xiong Huaping , Yu Wenjie , Cheng Yaoyong , Wu Xin , Wang Cuiping 
Published: August 2016

Abstract
The phase equilibria of the Co–Ni–Zr ternary system at 1 000 °C, 1 100 °C and 1 200 °C were experimentally investigated by means of back-scattered electron imaging, electron probe microanalysis and X-ray diffraction on the equilibrated ternary alloys. In this study, no ternary compound is found. The (αCo, Ni) phase region extends from the Ni-rich corner to the Co-rich corner with small solubility of Zr at three sections. At 1 000 °C and 1 100 °C, Ni5Zr, Co2Zr and Ni10Zr7 phases have large solid solution ranges, but Ni10Zr7 phase disappears at 1 200 °C. The Ni7Zr2, NiZr, Co11Zr2, Co23Zr6 and CoZr phases exhibit nearly linear compounds in the studied sections, and have large composition ranges. Additionally, some differences in phase relationship exist among the above three isothermal sections.
SOFT X-RAY EXCESS FROM SHOCKED ACCRETING PLASMA IN ACTIVE GALACTIC NUCLEI
Authors: Fukumura Keigo , Hendry Douglas , Clark Peter , Tombesi Francesco , Takahashi Masaaki 
Published: August 2016

ABSTRACT
We propose a novel theoretical model to describe the physical identity of the soft X-ray excess that is ubiquitously detected in many Seyfert galaxies, by considering a steady-state, axisymmetric plasma accretion within the innermost stable circular orbit around a black hole (BH) accretion disk. We extend our earlier theoretical investigations on general relativistic magnetohydrodynamic accretion, which implied that the accreting plasma can develop into a standing shock under suitable physical conditions, causing the downstream flow to be sufficiently hot due to shock compression. We perform numerical calculations to examine, for sets of fiducial plasma parameters, the physical nature of fast magnetohydrodynamic shocks under strong gravity for different BH spins. We show that thermal seed photons from the standard accretion disk can be effectively Compton up-scattered by the energized sub-relativistic electrons in the hot downstream plasma to produce the soft excess feature in X-rays. As a case study, we construct a three-parameter Comptonization model of inclination angle θ
obs, disk photon temperature kT
in, and downstream electron energy kT

e
to calculate the predicted spectra in comparison with a 60 ks XMM-Newton/EPIC-pn spectrum of a typical radio-quiet Seyfert 1 active galactic nucleus, Ark 120. Our χ
2-analyses demonstrate that the model is plausible for successfully describing data for both non-spinning and spinning BHs with derived ranges of 61.3 keV ≲ kT

e
≲ 144.3 keV, 21.6 eV ≲ kT
in ≲ 34.0 eV, and 17.°5 ≲ θ
obs ≲ 42.°6, indicating a compact Comptonizing region of three to four gravitational radii that resembles the putative X-ray coronae.
EXPLORING SYSTEMATIC EFFECTS IN THE RELATION BETWEEN STELLAR MASS, GAS PHASE METALLICITY, AND STAR FORMATION RATE
Authors: Telford O. Grace , Dalcanton Julianne J. , Skillman Evan D. , Conroy Charlie 
Published: August 2016

ABSTRACT
There is evidence that the well-established mass–metallicity relation in galaxies is correlated with a third parameter: star formation rate (SFR). The strength of this correlation may be used to disentangle the relative importance of different physical processes (e.g., infall of pristine gas, metal-enriched outflows) in governing chemical evolution. However, all three parameters are susceptible to biases that might affect the observed strength of the relation between them. We analyze possible sources of systematic error, including sample bias, application of signal-to-noise ratio cuts on emission lines, choice of metallicity calibration, uncertainty in stellar mass determination, aperture effects, and dust. We present the first analysis of the relation between stellar mass, gas phase metallicity, and SFR using strong line abundance diagnostics from Dopita et al. for ∼130,000 star-forming galaxies in the Sloan Digital Sky Survey and provide a detailed comparison of these diagnostics in an appendix. Using these new abundance diagnostics yields a 30%–55% weaker anti-correlation between metallicity and SFR at fixed stellar mass than that reported by Mannucci et al. We find that, for all abundance diagnostics, the anti-correlation with SFR is stronger for the relatively few galaxies whose current SFRs are elevated above their past average SFRs. This is also true for the new abundance diagnostic of Dopita et al., which gives anti-correlation between Z and SFR only in the high specific star formation rate (sSFR) regime, in contrast to the recent results of Kashino et al. The poorly constrained strength of the relation between stellar mass, metallicity, and SFR must be carefully accounted for in theoretical studies of chemical evolution.