bluuebunny/crossref_metadata_2025 huggingface dataset:
Morphology and Properties of Poly(Lactic Acid)/Ethylene-Octene Copolymer Blends with Different Organoclay Types
Authors: Wacharawichanant Sirirat , Sriwattana Attachai , Yaisoon Kulaya , Phankokkruad Manop
Published: April 2020

This work studied the morphology, mechanical and thermal properties of poly (lactic acid) (PLA)/ethylene-octene copolymer (EOC) (80/20) blends with different organoclay types. Herein, EOC was introduced to toughening PLA by melt blending and organoclay was used to improve compatibility and tensile properties of the blends. The two organoclay types were nanoclay surface modified with aminopropyltriethoxysilane 0.5-5 wt% and octadecylamine 15-35% (Clay-ASO) and nanoclay surface modified with dimethyl dialkyl (C14-C18) amine 35-45 wt% (Clay-DDA). The organoclay contents were 3, 5 and 7 phr. Scanning electron microscope (SEM) observation results revealed PLA/EOC blends demonstrated a two-phase separation of dispersed EOC phase and PLA matrix phase. The addition of organoclay significantly improved the compatibility between PLA and EOC phases due to EOC droplet size decreased dominantly in PLA matrix, so organoclay could act as an effective compatibilizer. The incorporation of organoclay increased significantly tensile strength of PLA/EOC/organoclay composites while Young’s modulus increased with 5 phr of organoclay. The thermal stability of PLA/EOC blends did not change when compared with neat PLA, and when added Clay-ASO in the blends could improve the thermal stability of the PLA/EOC blends.
Investigation of the Deformation Twins on the Bending Cross Section of TA2 Titanium Sheet
Authors: Sun Shuai , Liu Kai Hua
Published: April 2020

In order to determine the evolution features of deformation twins for TA2 commercial pure titanium (cp-TA2), the TA2 samples were bent under different bending angles in three-point bending tests via a universal testing machine. The electron backscatter diffraction (EBSD) technique was applied to identify the grain boundaries (GBs) and twin boundaries (TBs) in the bending areas. The results reveal that the type of deformation area would effect the evolution of different deformation twins. It is inferred that the state of stress would promote the multiplication of the same type of deformation twins.
Effect of Additives on Ash Corrosion on Heat Exchanging Surface of Biomass Boilers
Authors: Sun Yu , Wang Yong Zheng , Zhang Ke , Li Yun Gang
Published: April 2020

This paper focuses on the problems of ash deposition and corrosion caused by alkali metal chloride in biomass boiler. Kaolin, pulverized coal ash, silica fume, dolomite, limestone and bauxite are used as additives in this study, to investigate the degree of corrosion of four metal materials on biomass boiler. The results show that the corrosion rate of metal samples is significantly reduced after adding additives. Kaolin, pulverized coal ash, silica fume and bauxite show much obvious effect on corrosion inhibition. Corrosion resistance of four pipe metals: T91>15CrMoG>12CrMoVG>20G, in which the corrosion resistance of T91 is much better than the other three metals.
Recent Progress in Asymmetric Catalysis with Chiral Metal-Organic Frameworks
Authors: Zhang Meng Xi
Published: April 2020

Chiral metal-organic frameworks (CMOFs) have shown great promises in the applications of asymmetric catalysis with highly enantioselective. Herein, we briefly overview recent processes of MOF-based asymmetric catalysts based on a classification of reaction types. And we mainly focus on the structures and compositions of the active sites in these catalysts and their performances in specific reactions. In addition, some of their important unique features are critically emphasized alongside. Challenges of the future research are discussed also at the end of this review.
Experimental Study on Flexural Behavior of CFRP Reinforced Pre-Stressed Concrete Beams with Initial Cracks
Authors: Liu Yun Yan , Fan Ying Fang
Published: April 2020

In order to explore the flexural behavior of CFRP reinforced pre-stressed concrete (PC) beams with initial cracks, 6 pre-tensioned beams were manufactured. Then the beams were pre-loaded to crack with 40% and 60% ultimate load respectively, and the beams were strengthened by CFRP under the conditions of load holding and fully unloaded. After that, the four-points bending tests were performed, and beam section strains, flexural capacities and cracks were analyzed. The results demonstrate that the ultimate load of CFRP reinforced beams increased by 10%~18%, and the ultimate loads of CFRP reinforced load holding beams were 3% and 6% lower than that of CFRP reinforced non-destructive beam, and the inhibiting effect of CFRP on cracks was weakened, the hysteresis strains should be considered for them. In this paper, the fiber hysteresis strains were calculated by the method of full section decompression moment, and the flexural capacities of CFRP reinforced PC beams were calculated, which are in good agreement with the test results.
Adsorption Behavior of GTMS on AA2024-T3 Aluminum Alloy and the Application on Surface Pretreatment
Authors: Xue Bing , Zong Xue Mei , Wang Can , Zhang Hua Yuan , Luo Jing
Published: April 2020

Basing on the study of adsorption behavior of glycidoxypropyl-trimethoxy-silane (GTMS), pretreatment method of AA2024-T3 aluminum alloy for sol-gel films was optimized. The morphology, composition and corrosion protective performance of alloy coated with the films were investigated by using FE-SEM, EDS, AFM and EIS. The results showed that the Al matrix exhibited better ability to adsorb GTMS molecules than the second phase particles, especially at lower concentration of GTMS. Further, the 5% GTMS films cover the whole surface, but the selective adsorption behaviors still exist. It was concluded that less second phase particles and smoother surface were benefit to the sol-gel films on aluminum alloy. Depending on this conclusion, the pretreatment method for sol-gel films was optimized. The optimized surface condition conducted with 50 g•L-1 sodium hydroxide and ultrasound at 60 oC for 30 s was obtained. These samples coated with the sol-gel films revealed good anti-corrosion performance. The coverage degree of the films was up to 97.95 %.
Photocatalytic Performance of PVP-Doped TiO2 Nanorod Arrays Prepared by Hydrothermal Method
Authors: Li Rui , Qi Wen Qian , Zhou Zhi Fan , Wang Xuan , Gong Cheng , Yang Jin , Du Jun
Published: April 2020

Here we synthesized a high-density single crystal anatase phase TiO2/ITO nanorods array composite by one-step hydrothermal method. TiCl4, H2O, and HCl were used as the titanium precu-rsor, oxygen source, and inhibitors, respectively. The TiO2 nanorods array were analyzed using X-ray diffraction (XRD), energy dispersive X-ray spectrometer (EDX), scanning electron microscopy (SEM), optical contact angle tester and ultraviolet-fluorescence spectrophotometer, separately. The nanorods in the composite grew along the [101] crystal plane, with a diameter of about 500 nm and a length of about 3 μm. The effect of PVP addition on the crystal phase and morphology of TiO2 na-norod arrays was investigated. When the amount of PVP added was 0.5g, the diameter of nanorods was about 77-120nm, and a neat array structure appeared. In the photocatalytic experiment, methyl orange and acid red were used as degraded materials, the photocatalytic degradation rate was up to about 100%. When the hydrophilicity was the best, the optical contact angle of the sample after ultr-aviolet light irradiation was 7.2°. These results indicated that TiO2 after doping experiments got better photocatalytic properties.
Effect on Resistive Switching by Inserting TiOx Thin Layer in SiOx: Ag-Based Memristor
Authors: Ilyas Nasir , Yuan Yu Han , Zhao Xin , Li Dong Yang , Jiang Xiang Dong , Li Wei
Published: April 2020

An approach to design a memristor by inserting a TiOx thin layer in Pt-Ag/SiOx:Ag/TiOx/P++-Si memristor in order to exhibit analog resistive switching has been proposed. The device shows continuous resistance change under positive and negative DC sweeping bias, and the device conductance can also be modulated by consecutive potentiating and depressing pulse programming. These primitive results are beneficial to realize the learning and computing in such kind of memristor devices. High-resolution transmission electron microscopy observations demonstrate a clear interface between the thin layers of Ag nanoclusters embedded SiOx and the amorphous TiOx. The I-V analysis of Pt-Ag/SiOx:Ag/TiOx/P++-Si memristor confirms that the presence of TiOx thin layer controls the formation/rupture of Ag-filament across the Pt-Ag and P++-Si electrodes, realizing the gradual conductance modulation, which is essential to emulate the bio-synaptic characteristics.
Presidential address: 8th National Council Meeting for the South African Society of Physiotherapy - October, 1969
Authors: Bromilow-Downing B.
Published: April 2020

No abstract available.
On Nichols algebras of infinite rank with finite Gelfand–Kirillov dimension
Authors: Andruskiewitsch Nicolás , Angiono Iván Ezequiel , Heckenberger István
Published: April 2020

We classify infinite-dimensional decomposable braided vector spaces arising from abelian groups whose components are either points or blocks such that the corresponding Nichols algebras have finite Gelfand–Kirillov dimension. In particular we exhibit examples where the Gelfand–Kirillov dimension attains any natural number greater than one.
Saturation phenomena for some classes of nonlinear nonlocal eigenvalue problems
Authors: Della Pietra Francesco , Piscitelli Gianpaolo
Published: April 2020

Let us consider the following minimum problem

\lambda_\alpha(p,r)=\min_{\substack{u\in W_{0}^{1,p}(-1,1)\\u\not\equiv0}}\frac{\int_{-1}^{1}|u'|^{p}dx+\alpha\left|\int_{-1}^{1}|u|^{r-1}u\, dx\right|^{\frac pr}}{\int_{-1}^{1}|u|^{p}dx},

where

\alpha\in\mathbb R

,

p\ge 2

and

\frac p2 \le r \le p

. We show that there exists a critical value

\alpha_C=\alpha_C (p,r)

such that the minimizers have constant sign up to

\alpha=\alpha_{C}

and then they are odd when

\alpha > \alpha_{C}

.
On the growth of nonlocal catenoids
Authors: Cozzi Matteo , Valdinoci Enrico
Published: April 2020

As well known, classical catenoids in

\mathbb R^3

possess logarithmic growth at infinity. In this note we prove that the case of nonlocal minimal surfaces is significantly di¤erent, and indeed all nonlocal catenoids must grow at least linearly. More generally, we prove that stationary sets for the nonlocal perimeter functional which grow sublinearly at infinity are necessarily half-spaces.
Using 226Ra and 228Ra isotopes to distinguish water mass distribution in the Canadian Arctic Archipelago
Authors: Mears Chantal , Thomas Helmuth , Henderson Paul B. , Charette Matthew A. , MacIntyre Hugh , Dehairs Frank , Monnin Christophe , Mucci Alfonso
Published: April 2020

Abstract. As a shelf dominated basin, the Arctic Ocean and its biogeochemistry are heavily influenced by continental and riverine sources. Radium isotopes (226Ra, 228Ra, 224Ra, 223Ra), are transferred from the sediments to seawater, making them ideal tracers of sediment-water exchange processes and ocean mixing. 226Ra and 228Ra are the two longer-lived isotopes of the Radium Quartet (226Ra, t1/2 = 1600 y and 228Ra, t1/2 = 5.8 y). Because of their long half-lives they can provide insight into the water mass compositions, distribution patterns, as well as mixing processes and the associated timescales throughout the Canadian Arctic Archipelago (CAA). The wide range of 226Ra, 228Ra, and of the 228Ra / 226Ra ratio, measured in water samples collected during the 2015 GEOTRACES cruise, complemented by additional chemical tracers (dissolved inorganic carbon (DIC), total alkalinity (AT), barium (Ba), and the stable oxygen isotope composition of water (δ18O)) highlight the dominant biogeochemical, hydrographic and bathymetric features of the CAA. Bathymetric features, such as the continental shelf and shallow coastal sills, are critical in modulating circulation patterns within the CAA, including the bulk flow of Pacific waters and the inhibited eastward flow of denser Atlantic waters through the CAA. Using a Principal Component Analysis, we unravel the dominant mechanisms and the apparent water mass end-members that shape the tracer distributions. We identify two distinct water masses located above and below the upper halocline layer throughout the CAA, as well as distinctly differentiate surface waters in the eastern and western CAA. Furthermore, we identify water exchange across 80° W, inferring a draw of Atlantic water, originating from Baffin Bay, into the CAA. In other words, this implies the presence of an Atlantic water U-turn located at Barrow Strait, where the same water mass is seen along the northernmost edge at 80° W as well as along south-easternmost confines of Lancaster Sound. Overall, this study provides a stepping stone for future research initiatives within the Canadian Arctic Archipelago, revealing how quantifying disparities in radioactive isotopes can provide valuable information on the potential effects of climate change within vulnerable areas such as the CAA.
A 40-year High Arctic climatological dataset of the Polish Polar Station Hornsund (SW Spitsbergen, Svalbard)
Authors: Wawrzyniak Tomasz , Osuch Marzena
Published: April 2020

Abstract. The article presents the climatological dataset from the Polish
Polar Station Hornsund located in the southwest part of Spitsbergen – the
biggest island of the Svalbard archipelago. Due to a general lack of
long-term in situ measurements and observations, the High Arctic remains one
of the largest climate-data-deficient regions on the Earth. Therefore, the
described time series of observations in this paper are of unique value. To
draw conclusions on the climatic changes in the Arctic, it is necessary to
analyse and compare the long-term series of continuous, in situ observations
from different locations, rather than relying on the climatic simulations
only. In recent decades, rapid environmental changes occurring in the
Atlantic sector of the Arctic are reflected in the data series collected by
the operational monitoring conducted at the Hornsund station. We demonstrate
the results of the 40-year-long series of observations. Climatological mean
values or totals are given, and we also examined the variability of
meteorological variables at monthly and annual scale using the modified
Mann–Kendall test for trend and Sen's method. The relevant daily, monthly,
and annual data are provided on the PANGAEA repository
(https://doi.org/10.1594/PANGAEA.909042, Wawrzyniak and Osuch, 2019).
An updated tropospheric chemistry reanalysis and emission estimates, TCR-2, for 2005–2018
Authors: Miyazaki Kazuyuki , Bowman Kevin , Sekiya Takashi , Eskes Henk , Boersma Folkert , Worden Helen , Livesey Nathaniel , Payne Vivienne H. , Sudo Kengo , Kanaya Yugo , Takigawa Masayuki , Ogochi Koji
Published: April 2020

Abstract. This study presents the results from the Tropospheric Chemistry Reanalysis version 2 (TCR-2) for the period 2005–2018 at 1.1° horizontal resolution obtained from the assimilation of multiple updated satellite measurements of ozone, CO, NO2, HNO3, and SO2 from the OMI, SCIAMACHY, GOME-2, TES, MLS, and MOPITT satellite instruments. The reanalysis calculation was conducted using a global chemical transport model MIROC-CHASER and an ensemble Kalman filter technique that optimizes both chemical concentrations of various species and emissions of several precursors, which was efficient for the correction of the entire tropospheric profile of various species and its year-to-year variations. Comparisons against independent aircraft, satellite, and ozonesonde observations demonstrate the quality of the reanalysis fields for numerous key species on regional and global scales, as well as for seasonal, yearly, and decadal scales, from the surface to the lower stratosphere. The multi-constituent data assimilation brought the model vertical profiles and inter-hemispheric gradient of OH closer to observational estimates, which played an important role in improving the description of the oxidation capacity of the atmosphere and thus vertical profiles of various species. The evaluation results demonstrate the capability of the reanalysis products to improve understanding of the processes controlling variations in atmospheric composition, including long-term changes in near-surface air quality and emissions. The estimated emissions can be employed for the elucidation of detailed distributions of the anthropogenic and biomass-burning emissions of co-emitted species (NOx, CO, SO2) in all major regions, as well as their seasonal, and decadal variabilities. The datasets are available at: https://doi.org/10.25966/9qgv-fe81 (Miyazaki et al., 2019a).
La enseñanza del dibujo y la formación para el trabajo en los inicios del sistema educativo nacional argentino
Authors: Dosio Patricia A.
Published: April 2020

En este artículo se analizan los orígenes de la educación artística escolar en el sistema educativo nacional de Argentina a fines del siglo diecinueve. Contrariamente a la mirada tradicional que percibía sus contenidos como limitados e instrumentales, sin puntos en común con el hacer de los artistas, sostenemos que es posible efectuar otra lectura de ese momento de génesis. Si indagamos las acciones realizadas y los debates que circularon por entonces sobre el arte en la instrucción elemental, despunta una riqueza que complejiza aquella percepción más restringida. Emergen asimismo conexiones con el proyecto de los artistas coetáneos, empeñados en la formación de un público de arte y en la educación del gusto artístico, entre otros intereses. En esta dirección, la primera parte efectúa un paneo historiográfico de la instrucción pública, el modelo pedagógico imperante, las corrientes sobre educación del niño y los debates sobre utilitarismo y humanismo a fin de analizar la inserción del Dibujo en el sistema educativo finisecular. En un segundo apartado se estudian los objetivos iniciales de la materia, sus programas y su conexión con la formación de los sectores populares de la sociedad a partir de su derivación hacia aplicaciones industriales. En secciones siguientes se indaga, en tensión con la orientación aplicada del dibujo, la postura de Domingo Faustino Sarmiento.
Indagaciones sobre los Procesos de Creación Artística desde la Práctica
Authors: Nogué-Font Àlex
Published: April 2020

Este artículo propone un acercamiento a la construcción de significados durante los procesos de creación. Es una indagación que se ha realizado desde la propia experiencia creativa. Pretendemos reconocer alguna de las motivaciones creativas, centrándonos en las formas de definir los intereses y las intenciones comunicativas. Aceptamos desde el inicio que las intenciones creativas pueden ser volátiles, difusas y cambiantes, como también lo son, a lo largo del tiempo, las interpretaciones de las obras producidas. La propia experiencia creativa será el material de observación con las ventajas que conlleva (proximidad de la experiencia) y las desventajas (la desviación subjetiva). Desestimamos cualquier intento de generalización metodológica. Sin embargo, otros autores pueden haber experimentado procesos paralelos. El concepto de “investigación artística”, actualmente muy debatido, nos servirá de marco teórico referencial.
Bartleby, o el organismo enfermo: Notas críticas sobre la ontología y la prospectiva del sujeto ético de Giorgio Agamben
Authors: Periáñez Llorente Luis
Published: April 2020

Analizamos en este artículo la ontología y la prospectiva del sujeto ético en la obra de Giorgio Agamben, centrándonos particularmente en su concepción del humano como resto o escisión constitutiva, y su apropiación de la figura de Bartleby el escribiente como figura paradigmática de una ética posible. Frente al sujeto ético así delineado, que nuestro análisis comprende como deudor de una noción no foucaultiana de los dispositivos, ofrecemos una lectura de autores como José Luis Villacañas, Georges Canguilhem o Jean-Luc Nancy en torno a un cuerpo biológico que no puede o no debe ser pensado como pasividad inoperante.
Immanuel Kant, Hacia la Paz Perpetua. Un diseño filosófico. Traducción, edición, introducción y notas de R. Rodríguez Aramayo, CTK E-Books, Ediciones Alamanda, Madrid, 2018, 141 pp.
Authors: Bertomeu María Julia
Published: April 2020

Reseña del libro de Immanuel Kant, Hacia la Paz Perpetua. Un diseño filosófico. Traducción, edición, introducción y notas de R. Rodríguez Aramayo, CTK E-Books, Ediciones Alamanda, Madrid, 2018, 141 pp.
Francis Fukuyama, Identity: The Demand for Dignity and the Politics of Resentment, New York, Farrar, Straus and Giroux, 2018, 240 pp.
Authors: Leyva Karel J.
Published: April 2020

Reseña del libro de Francis Fukuyama, Identity: The Demand for Dignity and the Politics of Resentment, New York, Farrar, Straus and Giroux, 2018, 240 pp.
Docente de la UNAN-Managua publica el "Breve diccionario de la lengua popular en hablantes de Managua"
Authors: Matus Lazo Roger
Published: April 2020

Las palabras sirven para representar las cosas y para expresar las ideas y sentimientos. Pero como las cosas no siempre permanecen estables y las ideas y sentimientos experimentan variación en sus matices y por tanto movimientos de sentido, las palabras que los designan tienen que reflejar estos cambios semánticos. Es lo que nos logra demostrar la maestra Francis Mendoza Morán con este Breve diccionario de la lengua popular en hablantes de Managua, Nicaragua, su más reciente obra lexicográfica, que viene a enriquecer y fortalecerlos estudios léxico-semánticos en el español de uso actual en nuestro país.
The Impact of Social Deprivation on Orthopaedic Outpatient Satisfaction Using the Press Ganey Outpatient Medical Practice Survey
Authors: Stephens Andrew R. , Tyser Andrew R. , Kazmers Nikolas H.
Published: April 2020

Introduction:

In orthopaedics, multiple factors (patient age, wait time, and depression) have been associated with lower Press Ganey Outpatient Medical Practice Survey (PGOMPS) patient satisfaction scores. We hypothesized that increased social deprivation is an independent predictor of lower patient satisfaction, as measured by the PGOMPS.

Methods:

We retrospectively reviewed unique new outpatient orthopaedic surgery visits between January 1, 2014, and December 31, 2016, at a single tertiary academic institution. Given the high ceiling effects, satisfaction was defined a priori as achieving a score above the 33rd percentile. Social deprivation was determined using the 2015 Area Deprivation Index (ADI). Univariate and multivariable binary logistic regressions were used to detect factors associated with patient satisfaction for both the PGOMPS Total Score and Provider Sub-Score.

Results:

Of the 4,881 included patients, the mean age was 53.3 ± 15.9 years, 59.3% were women, and mean ADI was 30.1 ± 19.2. Univariate analysis revealed a significantly decreased odds of achieving satisfaction on the Total Score for each decile increase in ADI (odds ratio [OR] 0.94; P < 0.001). Compared with the least deprived quartile, patients of the most deprived quartile were significantly less likely to report satisfaction for both the Total Score (OR 0.56; P = 0.001) and Provider Sub-Score (OR 0.63; P = 0.011). Multivariable analysis revealed that the odds of achieving satisfaction for each decile increase in ADI were 0.96 for the Total Score (P = 0.014) and 0.95 for the Provider Sub-Score (P = 0.004), independent of age, wait time, race, subspecialty, provider type, and the clinic setting.

Conclusions:

Increased social deprivation was an independent predictor of orthopaedic outpatient dissatisfaction on the PGOMPS. These findings should be considered when interpreting patient satisfaction scores and lend further support in an effort to improve healthcare inequalities.

Level of Evidence:

Level III
Living Conditions in the Countries of the Zachodniopomorskie Voivodeship in the Years 2002–2015 in the Light of Demographic Changes
Authors: Sompolska-Rzeczuła Agnieszka , Machowska-Szewczyk Małgorzata
Published: April 2020

The aim of the study was to assess the living conditions of the population of the West Pomeranian Voivodeship against the background of population changes. The study covered counties in the years 2002–2015. Linear ordering of objects with Weber median was used because of the asymmetry of most features. The linear ordering of counties was created in 2004, 2007 and 2015 years. The choice of years was related with the accession of Poland to the EU and the end of the first and second periods of EU funding. Based on the research conducted, it was found, that counties are strongly differentiated in terms of living conditions and population changes. In most of the poviats, the population has increased and living standards improved. Assessment of living conditions of the inhabitants of the West Pomeranian Voivodeship counties was presented in a dynamic way, considering population change. An original proposition of indicators measuring living conditions in a local approach was presented. Local authorities can take advantage of research results in decision making concerning improvement of social and economic development level in Voivodeship.
Refined Bonferroni prediction bands for autoregressive models
Authors: Staszewska-Bystrova Anna
Published: April 2020

Joint prediction bands are often constructed using Bonferroni’s inequality. The drawback of such bands may be their large width and excessive coverage probability. The paper proposes two refinements to the basic Bonferroni method of constructing bootstrap prediction bands. These are based on higher order inequalities and optimization of the width of the band. The procedures are applied to the problem of predicting univariate autoregressive processes. Their properties are studied by means of Monte Carlo experiments. It is shown that the proposed methods lead, in many scenarios, to obtaining relatively narrow prediction bands with desired coverage probabilities.
Study of spatial uniformity of sustainable development of the European Union before, during and after the economic crisis
Authors: Bąk Iwona , Cheba Katarzyna
Published: April 2020

The purpose of the paper is study of spatial uniformity in the field of sustainable development of European Union and geographical regions of Europe analyzed by the prism of EU countries located in this regions before, during and after the economic crisis from 2007–2008. Material and methods The analysis of similarities and differences between the EU Member States countries or in the case of geographic regions of Europe has been based on sustainable development indicators published by Eurostat. To the final set of diagnostic features, the 22 indicators have been selected. To study the spatial differentiation of sustainable development the taxonomic measure of development based on median vector Weber as well vector calculus were used. The impact of the economic crisis is particularly obvious in the Southern and Eastern European Union countries. The position of the Southern countries, that failed to cope with the world economic and financial crisis, deteriorated and they fell into the group at the lowest level of development. The results obtained in this study can be used in subsequent years to examine the direction of changes in sustainable development levels observed both from the point of view of the EU Member States and geographical regions.
Natural Capital in Economic Models
Authors: Kornafel Marta , Telega Ivan
Published: April 2020

The goal of our paper is to make a critical analysis of selected growth models that use the notion of natural capital and to construct the alternative model. In particular we treat the natural capital as a renewable resource and we use CES production function, weakening the assumption of substitutability of natural capital with other forms of capital. We investigate the optimal paths for capital and consumption, giving their characterization in the dependence on the parameters of the model. The paper ends with conclusions derived from the model.
Efficiency of Raising of the Funds for the Didactic and Scientific Activity in Public Higher Education in Poland
Authors: Brzezicki Łuksz , Prędki Artur
Published: April 2020

The article estimates the efficiency of 59 public higher education institutions in Poland in rising of funds for didactic and scientific activity in 2015 using nonparametric DEA method. We used output-oriented BCC model. The work also uses the subsampling procedure to assess the accuracy of the previously performed efficiency measurement. Twelve universities turned out to be fully efficient in the above-mentioned scope, while the average efficiency is quite high and close to the median.
Evaluation of socio-economic development of voivodships using HDI
Authors: Hozer-Koćmiel Marta
Published: April 2020

The aim of this article is to examine the level of socio-economic development of voivodships using HDI (Human Development Index), which considers life expectancy at birth, number of years of schooling and GDP per capita in purchasing power parity. The hypothesis about the increase in the level of voivodships development with simultaneous growth of differences between them was formulated. Statistics Poland’s data for the years 1995, 2010, 2013 and 2015 were used in the research.
The research showed that HDI was growing systematically for all voivodships in the years 1995-2015 and confirmed the deepening diversification of voivodships in terms of socio-economic development. The most developed were such voivodships as: Mazowieckie, Małopolskie, Wielkopolskie and Dolnośląskie, whereas, the least developed ones were: Lubuskie, Warmińsko-Mazurskie, Podkarpackie and Świętokrzyskie.
Influence of GDP changes on the spatial variation of unemployment in Ukraine
Authors: Chugaievska Nataliia , Tokarski Tomasz
Published: April 2020

The purpose of the study is to describe the spatial variation of GDP per capita and unemployment rates in the Ukrainian oblasts in the years 2004—2015. The influence of GDP growth rates and unemployment rate delayed by one year on the growth of unemployment rate was examined. For this purpose, methods of panel data econometrics (regression with fixed effects) were used. The research used data published by the State Statistics Service of Ukraine. In the initial years of the analysed period, Ukraine was rapidly developing, which led to an increase in employment and a decrease in unemployment. The global financial crisis resulted in one-year recession and a rapid growth of the unemployment. After the events in the years 2013—2014 (Euromaidan) there was a decline in GDP combined with an increase in unemployment. These processes to the greatest extent were present in the oblasts of Eastern Ukraine, especially in Luhansk and Donetsk.
Activities and initiatives of the Federation of European National Statistical Societies
Authors: Trzpiot Grażyna
Published: April 2020

The article presents the European association of statistical societies — Federation of European National Statistical Societies (FENStatS) — and initiatives taken by them. The agreements concluded between the statistical societies create the latest picture of European statistics. The Polish Statistical Association participates in the FENStatS initiatives.
Activity of statistical institutions in Łódź in the interwar period
Authors: Domański Czesław
Published: April 2020

The article briefly discusses the creation and activity of statistical institutions in the Łódź region during the interwar years. In particular, the history of the Statistical Department at the City Council of Łódź, established by the City Council on 19 September, 1917, was presented. The Department functioned from 1 January, 1918 and its most important task was to conduct censuses of the population, one of the largest and most difficult statistical undertakings. In the discussed period, the urban statistics of Łódź covered the most important spheres of the city’s life, including state and municipal offices.
Work calculator: a useful tool for modelling relations on the labour market
Authors: Bieć Maria , Gałecka-Burdziak Ewa , Pater Robert
Published: April 2020

The aim of the article is to present the concept of a job calculator — a tool used to create a simulation of relations between changes in the economic situation and the labour market in Poland. The job calculator is based on the American Jobs Calculator and is available for everyone. The user determines the height of expected unemployment rate and the tool computes the number of required job offers, the creation and coverage of which will result in the change of the unemployment rate to the predefined level. The calculator uses data from the Labour Force Survey (LFS) and presents simulations for one quarter. The values refer to the total result, taking into account the seasonal fluctuations and division into long-term and cyclical changes, which is the authors’ contribution to the original American model as well as an extension of this concept.
Analysis of the tone of discussions at the decision-making meetings of the Monetary Policy Council
Authors: Doryń Wirginia
Published: April 2020

Communiqués of central bank are an important complement to the monetary policy instruments. The aim of the article is to present the results of the quantitative study of the tone of official communiqués in English of the National Bank of Poland, which are descriptions of discussions at the decision-making meetings of the Monetary Policy Council published in the years 2007—2017. The list of words developed by Bennani and Neuenkirch (2017) was used to evaluate the tone. Determined measures of tone were compared with economic indicators.
It was found that the sentiment of NBP’s communiqués quite strongly correlates with the survey measures of the business tendency and to a lesser extent with the index of sold production of industry, having a leading nature of 2 months in relation to these indicators. The obtained results also indicate a significant relationship between the tone of the NBP’s statements and the business tendency in Germany, the euro area countries and the European Union.
Is full inclusion always the answer?
Authors: Wilcox Gabrielle , Wilcox Gabrielle
Published: April 2020

In this article the author presents inclusive education as a policy, which in recent decades has often been viewed as a moral imperative. She presents this issue in a dichotomous choice: either full inclusion or special education. This chapter joins other voices in arguing for a more nuanced approach to inclusive practice. One that demands better quality research on which to base decisions and puts student needs and goals above blanket policies that are applied indiscriminately. The author oncludes future research also needs to remediate current limitations of research of the efficacy and effectiveness of inclusive education including: limited comparison or control groups, weak research designs, no measures of treatment fidelity, lack of clarity in the outcome measures (academic, behavioral, adaptive, etc.), limited attention to what the benefits and detriments of inclusion are, variable impact across populations, and to implement more randomized control trials.
Disability or language barrier? Attitudes towards deafness among hearing parents of children with hearing impairment
Authors: Makowiecka Katarzyna
Published: April 2020

The aim of the following article was to investigate the attitudes towards different aspects of deafness among hearing parents of children with hearing impairment. It was hypothesized that the valence of the attitude correlates with various factors, for instance: parents’ level of education, child’s age and number of other people with hearing loss known by the parents. For the purpose of this research, a 32-item scale, based on the theory of dualistic models of attitudes was created. Positive attitudes were associated with preference for sociocultural perspective on deafness, including respect for child’s preferred communication method, acceptance for sign language, perceiving people with hearing loss as able-bodied. Contrarily, negative perspective was related to the medical perspective on deafness, which includes insisting on curing deafness and treating it as a disability which requires supportive solutions e.g. hearing aids or cochlear implants. Neither of the two models appeared dominant. Further analyses were addressed to explore parents’ knowledge and beliefs about hearing impairment.
Factors of entrepreneurship development in Eastern Poland
Authors: Jabłońska Małgorzata , Dziuba Radosław , Hurak Ihor
Published: April 2020

The aim of the article is to identify factors influencing the formation of new enterprises, with particular emphasis on the border regions of Eastern Poland, which are among the least developed ones in terms of entrepreneurship. The analysis of enterprises functioning in Eastern Poland in the years 2007—2017 was performed using log-linear (power) model, estimated on the basis of data from the Local Data Bank of Statistics Poland.
The results of the conducted research showed that the development of entrepreneurship in border regions of Eastern Poland is conditioned by different factors than in voivodships with a higher level of entrepreneurship.
THE EFFECT OF CUTTING TOOL WEAR ON THE RATE
OF CORROSION WEAR OF A MACHINED MATERIAL
Authors: BEZJAZYCHNYI Vyacheslav F. , PLESKUN Vladislav V.
Published: April 2020

A possible variant for calculated estimation of the degree of the impact of the cutting tool wear on the value
of the part’s surface layer wear obtained during processing with the edge tool, due to atmospheric corrosion,
is presented. The feature is the evaluation of the wear rate and its numerical value depending on the tool wear,
roughness parameters of the work piece surface, and the degree of cold hardening of the surface layer, as well
as parameters of the technological machining conditions (cutting conditions, geometry of the tool cutting part,
properties of the machined and the tool materials).
THE EFFECT OF PRESSURE AND TIME OF STATIONARY
CONTACT UNDER LOAD ON THE STATIC FRICTION
COEFFICIENT OF POLYURETHANE ELASTOMERS (EPUR)
DURING FRICTION ON STEEL IN VARIOUS LUBRICATING
CONDITIONS
Authors: CAPANIDIS Dymitry , SOKOLSKA Justyna
Published: April 2020

Tribological tests were aimed at determining the value of static friction coefficient μ0 of EPUR with hardnesses
75, 80, 83, and 93 ° Sh A, during friction on C45 steel under various lubrication conditions. In the tests, the
unit pressure values in the range of p = 0.2 – 0.8 MPa and the time of stationary contact under load were
changed in the range of t = 1 – 9 min, both in dry friction conditions, lubricating with water, and lubricating
with two types of greases – with low and high adhesion to steel. The tests were carried out on a device whose
operating principle is based on an inclined plane. The results of the tests showed that both the unit pressure
and the stationary contact time have a significant impact on the value of the static friction coefficient in the
EPUR-steel pair.
Avaliação do nível de satisfação dos clientes de um restaurante em Santa Maria – RS
Authors: Moreira Junior Fernando De Jesus , Oliveira José Renê de , Ansuj Angela Pellegrin , Weise Andreas Dittmar
Published: April 2020

This paper aims to evaluate the satisfaction level of customers of a restaurant inSanta Maria- RS, using descriptive statistical analysis in order to identify opportunities for improvements to the rated restaurant. Customers were asked to rate, for each item, your satisfaction, according to a Likert scale. The results showed that the restaurant seems to meet customer expectations with respect to its internal structure, layout, accessibility, location, the options and the speed in payment and the price charged in addition to all aspects aspects related to food. However, it was found that the highest rates of dissatisfaction are related to the smell of the internal environment, parking and internal decoration. The results presented by this research, as well as recommendations for improvement will be forwarded to the restaurant so that necessary measures can be taken to ensure continuous improvement of the quality of their services.
As plataformas de informação dos poderes estaduais brasileiros contribuem para a construção da transparência passiva?
Authors: Drehmer Amanda Finck , Raupp Fabiano Maury
Published: April 2020

The objective of the article was to investigate the contributions of the information platforms of the branches of governments of Brazilian states to build passive transparency. A descriptive study was carried out, through documentary research, with a predominantly qualitative approach. The object of investigation comprises the executive, legislative and judicial branches of governments of Brazilian states. The data were collected in February 2017 using the structured observation technique, through a protocol for recording information. The data obtained were analyzed using the descriptive analysis technique. The indicators for evaluation of the platforms were ‘communication’, ‘login and receipts’ and ‘barriers’, and they presented different configurations in each of the branches. In terms of ‘communication’ and ‘login and receipts’, in general, the state executive branch received better scores compared to the judiciary and legislative branches. On the other hand, the indicator ‘barriers’, was better evaluated in the judiciary and legislative branches. From the results obtained, it is not yet possible to confirm whether the platforms of the executive, judicial and legislative branches of the Brazilian states contribute to build passive transparency.
Desempenho organizacional: influência de fatores contingenciais em empresas de desenvolvimento de software catarinenses
Authors: Petry David Rodrigo , Oro Ieda Margarete , Suzana Jaqueline , Lorentz Josiane Aparecida , Piekas Andrezza Aparecida Saraiva , Paludo Jorge Carlos
Published: April 2020

This study assesses the influence of contingency factors such as environment, structure, strategy, technology, and size on the organizational performance of software development companies in the state of Santa Catarina. After the presentation of the foundations that formed the basis for the elaboration of the research construct, there was a quantitative survey that used a structured questionnaire to sample 34 companies in the software industry. For the data analysis, we used statistical instruments, reliability tests, the Pearson correlation and regressions to achieve the proposed objectives. The results show that, in general, the contingency factors influence the performance of software companies. After individually comparing the contingency factors with performance, the only factor that showed no significant correlation was structure while all the other factors were correlated with performance. In the regression, the generated model retained only the variable strategy and excluded the others. This established a regression equation that provided the degree of influence of this variable on the performance of software companies.
Sustainable business digital technology-based model: BikePoa case study as an example
Authors: Levrini Gabriel Roberto Dellacasa , Nique Walter Meucci
Published: April 2020

Environmental disasters attributed to global warming, strong media pressures towards an ecologically sustainable consumption, give path to alternative forms of green and sustainable consumption, like the sharing economy, a rising pattern in consumption behavior, based on accessing and reusing products to utilize idle capacity. The sharing economy holds the potential to bring effectiveness toward widespread sustainable business practices.The research objective is to propose a sustainable business technology-based model using technology as mediator among the shared economy agents under the lens of Actor Network Theory (ANT). We have chosen, as a sample, BikePoa bicycle sharing system has 40 stations and more than 2,000 bikes, throughout the city of Porto Alegre, in Brazil. The research methodology followed Kozinets’s (2006) participant-observational netnography. It was done 23 personal interviews with users and 7 with employees’ provider, and later through Google Docs 251 questionaries’ were selected. Findings point for two different factors consumers’ inductors and providers ‘connection factors.
Leadership styles: perceived differences between male and female leaders in the fields of finance and accounting
Authors: Dias Emerson Weslei , Veloso Elza Fatima Rosa , Treff Marcelo Antonio
Published: April 2020

The purpose of this study is to identify how accounting and finance professionals perceive the leadership styles adopted by their male and female leaders. In order to analyze the hypothesis that there are differences in leadership styles between men and women, a bibliographical review of leadership style and contingency theories was carried out. For the data collection, an electronic survey was carried out, using an adapted version of the EAEG (Escala de Avaliação do Estilo Gerencial) scale proposed by Melo (2004), totaling 278 valid responses. Although the general hypothesis has been rejected, the results indicate that women still face differences in their chances of assuming leadership positions.
Process of changing the design manufacturing of a food company: the contribution of project management
Authors: Hammoud Alessandro , Fernandes Gide José , Rodrigues Ivete
Published: April 2020

Given the economic instability of Brazil, the company followed in this technical report realized the need to modernize its industrial park, with the major focus in maintaining the excellence in quality and innovation in the line of products. This work aims to describe the preparation and management of the project, considering the strategy of the organization and the alignment with the board of the company. Being the result of the knowledge acquired from the mistakes and achievements in the management history of the organization, the adopted model of project management was decisive for the success of the intervention. Through careful control, even for small budget and schedule deviations, and through the efficient organization of the steps, there was an opportunity to acquire knowledge about project management; low project cost variance (3.89% of financial deviation, below the expectation when compared to previous projects); schedule anticipation (the rollout step was started 15 days before the planned period); a 20% increase of productivity and product quality gains (30% of reduction in the setup time for extraction). The well-succeeded experience in management and team training might be replicated to other projects in the company, besides contributing to strengthen the importance of project management in suppliers and similar companies.
Reflexões sobre a dança e a educação a distância: uma perspectiva inclusiva na cultura digital
Authors: Wosniak Cristiane do Rocio , Motta Everson Luiz Oliveira
Published: April 2020

Este artigo tem o objetivo de refletir sobre as possibilidades de uma educação tecnológica e híbrida como contributo para a formação de artistas-docentes no âmbito das licenciaturas em dança no Brasil. O foco da investigação recai sobre a proposta de educação a distância (EaD), que rompe o paradigma da aprendizagem e da prática da dança unicamente de forma co(rpo)presencial e artesanal. A partir da verificação do estado da arte de nosso objeto de pesquisa no Brasil, constatamos a inexistência de publicações dedicadas ao tema dança e educação a distância. Assim sendo, propomos uma ampla discussão, ancorados na metodologia de revisão bibliográfica narrativa, sobre a possibilidade desafiadora da educação a distância, com seus meios de aprendizagem e instrumentos comunicacionais, na relativização de espaços geográficos, nas aproximações de conhecimentos acerca da linguagem da arte/dança e na otimização do tempo de acesso a um conjunto de informações, mediadas pelas plataformas digitais. Concluímos que a EaD torna-se um elemento imprescindível para repensarmos/avaliarmos nossas práticas educacionais colaborativas no âmbito da formação de professores de dança, que deverão atuar nos novos contextos educacionais contemporâneos, permeados por uma vasta rede de relações que concebem o corpo e a comunicação ubíqua em suas extensões tecnológicas multifacetadas.