bluuebunny/crossref_metadata_2025_split huggingface dataset:
Analysis of Ferroelectric Thin Film BaZr0.6Ti0.4O3with Annealing Temperature Increase Variations Using x-ray Diffraction
Authors: Dewi Rahmi , Hamzah Yanuar , Zulkarnain  , Krisman  , Rini Ari Sulistyo , Shahab Tengku Said Luqman Hussain 
Published: November 2020

AbstractFerroelectric is a dielectric material which has spontaneous polarization and has the ability to change its internal polarization using a suitable electric field. The aim of this research is to decrease the FWHM value and increase the crystal size so that the dielectric constant increases for capacitor applications. Thin film ferroelectric material of Barium Zirconium Titanate (BZT) with the composition BaZr0.6Ti0.4O3was prepared using the sol-gel method. The substrate used was FTO glass which has been treated etching and coated with BZT and in annealing at 800° C with annealing temperature increase of 5°C and 10°C. Samples were characterized using XRD with an angle interval of 2θ between 20° to 60°. The results of XRD characterization show that there were peaks indicating that there was a crystal structure. The resulting crystal structure was in a plane 100 at an angle of 2θ = 22.55°, a plane 110 at an angle of 2θ = 32.00°, a plane 111 at an angle of 2θ = 38.54°, and a plane 200 at an angle of 2θ = 47.64°. The resulting structure in this study was tetragonal where a = b = 3.955 and c = 4.266. The rate at which temperature rose had an effect on the peak of X-Ray diffraction. The FWHM value for 5°C was less than 10°C. This implies a greater density when annealing at 5°C. The crystal size values obtained with an increase in temperature of 5°C and 10°C in the 100 plane were 3.22 and 2.954, respectively. The crystal size was inversely proportional to the FWHM value where the small speed of the annealing temperature increase caused the crystal size to enlarge.
IV International Meeting of Mathematical Education
Authors: Parra-López H M , Vergel-Ortega M , Dueñas Ramírez L M 
Published: November 2020

Sharing the motto “Mathematics is Everywhere” and its icon “The crane” symbolizes honesty, maturity, the judgment that ensures the growth of all in spite of unseasonable winds and integrity, the objective of the IV International Meeting on Mathematics Education (IV IMME) is to create and maintain a space that privileges and promotes the culture of mathematics, reflection, and discussion on education and the application of mathematics, statistics, its history, evolution and didactics, and its interrelationship with science. At the meeting, researchers, scientists, and mathematics teachers socialize research results, consolidate networks for the exchange of successful experiences, with the purpose of strengthening mathematics education at different educational levels, promoting innovation, and fostering the creation of educational policies, models, strategies, tools and techniques, in various areas of knowledge and encouraging students’ interest in research.
List of Organizing Committee International Scientist Committee National Scientific Committee are available in the pdf.
Adaptive control systems with linear regressor and parameter identification algorithm applied to a magnetic levitation system
Authors: Mesa F , Devia D M , Ospina R 
Published: November 2020

Abstract
Conventional regulators or controllers are used regularly in control engineering, however, there are limitations to their use. In this document we develop the essential mathematical concepts and expressions in the study of adaptive control techniques. To do this, we will initially make a brief deduction of the equations that are identified in a linear regressor control system, and also for the case of the parameter identification algorithm. Next, we will apply this control technique in a non-linear state space system for a magnetic levitation system, allowing us to conclude, among other things, that this technique makes the control more robust.
Assembly and performance study of a triple gas electron multiplier with a 55Fe source
Authors: Fuentes F , Gutiérrez R M , Pastrán C G , Catañeda L F 
Published: November 2020

Abstract
In this work, a process for the assembly of a standard triple Gas Electron Multiplier detector and the study of the main variables was made at the Universidad Antonio Nariño, Colombia, detectors laboratory. The triple gas electron multiplier was tested with Ar/CO2 mixtures in proportions of 70/30%, 80/20% and 90/10% using a 55Fe X-ray source (5.9 keV). The energy spectrum, energy resolution, effective gain and ionization rate were analyzed according to the applied voltage and the Ar/CO2 gas mixture. The Universidad Antonio Nariño, Colombia, triple gas electron multiplier detector obtained an energy resolution of up to 19% and an effective gain close to 104; where the detection efficiency is approximately 95%. These results were compared with other studies to check the triple gas electron multiplier performance.
Teaching the wave concept through problem-based learning
Authors: Gallardo Pérez H J , Vergel Ortega M , Rojas Suárez J P 
Published: November 2020

AbstractThe wave movements can be studied from autonomous work done by the student since they are processes in which he can appreciate and understand how the transmission of energy from one part to another without transfer of matter is. Problem-based learning constitutes a good alternative to study the concept of waves since it sequentially leads the student to structure the knowledge to use it in the context, to develop effective processes of reasoning, to develop self-directed learning skills and to motivate him/her to learn, together with the development of the capacity to work in a team and it favors the development of the mathematical physical thought. The research is developed from the multi-method methodological approach developing in-depth interviews to teachers and knowledge tests to students with the purpose of establishing both pre-knowledge and initial situations for structuring the pedagogical intervention and the evaluation of its results. The pedagogical intervention is structured on a quasi-experimental design in which the strategy of problem-based learning is applied to the teaching and learning of physics and is compared with the traditional methodology. The research allows us to conclude that applying the problem-based learning methodology to physics teaching, we obtain better educational yields than with traditional teaching, while it generates a greater motivation and a greater interest in learning. It also allows the student to integrate the knowledge into his or her context, visualize the usefulness of learning and apply knowledge to the solution of problems in his or her environment, in other words, it allows the student to achieve significant learning and therefore a development of mathematical physical thinking.
Using concept maps to understand mechanical physics concepts in high school students
Authors: Hernández-Suárez C A , Prada-Nuñez R , Gamboa-Suárez A A 
Published: November 2020

Abstract
The work presents a didactic proposal on the use of concept maps, for the understanding of mechanical physics. A didactic intervention based on Ausubel’s theory was applied with the following activities: design, implementation and application of workshops based on real physical situations, where the elaboration of concept maps is the central axis, under the quantitative paradigm of interpretative level and action research method. The informants were 43 tenth grade students from a public educational institution located in the Department of Norte de Santander, Colombia. The results obtained showed that the use of concept maps as a didactic intervention favoured the significant learning of classical mechanics concepts. It was evident that the participating students achieved reflective analysis about the resolution of problems about the concepts of mechanics.
Spatially and temporally coherent reconstruction of tropospheric NO2 over China combining OMI and GOME-2B measurements
Authors: He Qin , Qin Kai , Cohen Jason Blake , Loyola Diego , Li Ding , Shi Jincheng , Xue Yong 
Published: November 2020

Abstract
Tropospheric NO2 columns retrieved from ozone monitoring instrument (OMI) are widely used, even though there is a significant loss of spatial coverage due to multiple factors. This work introduces a framework for reconstructing gaps in the OMI NO2 data over China by using machine learning and an adaptive weighted temporal fitting method with NO2 measurements from Global Ozone Monitoring Experiment–2B, and surface measurements. The reconstructed NO2 has four important characteristics. First, there is improved spatial and temporal coherence on a day-to-day basis, allowing new scientific findings to be made. Second, the amount of data doubled, with 40% more data available. Third, the results are reliable overall, with a good agreement with Multi-AXis Differential Optical Absorption Spectroscopy measurements (R: 0.75–0.85). Finally, the mean of reconstructed NO2 vertical columns during 2015 and 2018 is consistent with the original data in the spatial distribution, while the standard deviation decreases in most places over Mainland China. This novel finding is expected to contribute to both air quality and climate studies.
Ecological and geological soil assessment of the Loshamye Lake catchment area (national park “Smolensk Lakeland”)
Authors: Podlipskiy I I , Zelenkovskiy P S , Dubrova S V , Hohryakov V R 
Published: November 2020

Abstract
The authors conducted the ecological and geochemical study of Lake Loshamye and adjacent territories (national park “Smolensk Lakeland”) to identify the distribution patterns of heavy metals and their associations (Hg, Cr, Mn, Fe, Co, Cu, Zn, As, Cd, Pb, Sr, etc.) in soils of the lake’s catchment area. In 2008, the annual monitoring by the national park revealed abnormally high concentrations of mercury in the water of Lake Loshamye (20 MPC). In subsequent years, the mercury concentration decreased to the minimum natural level. A set of studies in the catchment area and in the lake itself established a probable technogenic source and determined the qualitative and quantitative characteristics of the impact. Scientists studied the soil of the catchment area of the lake to verify the version of the pollutant intake from outside. The article presents the results of the study, a set of mathematical methods of information processing. Authors conducted a correlation, factor and cluster analysis to identify patterns of distribution of heavy metals in soils. Peculiarities of the distribution of most elements in the soil today indicate the presence of a low technogenic impact on the soils of the Lake Loshamye basin regarding the formation of low-contrast anomalies Cu, As, Mn, Pb and Cr, Hg. Patterns of the distribution of heavy metals including mercury in soils and their concentration have natural character. The gross mercury content in soils is significantly lower than the MPC (2100 μg/kg), the median of the sample is 42 μg/kg, which practically corresponds to the world Clark of mercury in soils (40 μg/kg). The research results show that the soils of the lake’s catchment area do not bear traces of anthropogenic impact. This suggests that there are no sources of contamination with mercury and other heavy metals in the study area, and this area is not a transit hub for the movement of the pollutant from the outside, and in 2008 there was probably salvo-type pollution directly into the lake’s water.
Forecasting the use of non-stationary waterflooding in the conditions of oil deposits in Western Siberia
Authors: Batalov D A , Soloviev N N , Mukhametshin V Sh , Andreev V E , Dubinskiy G S , Safiullina A R 
Published: November 2020

Abstract
The researchers have developed simplified models of the studied formations in the Langepasneftegaz TPP to forecast the effectiveness of using non-stationary waterflooding with flow control and flow diverting technologies. To increase oil recovery and intensify the influx of oil from the reservoirs, they recommended the integration of technologies. The article shows that complex technologies for impacting oil and gas deposits using non-stationary waterflooding aimed at increasing the oil recovery coefficient and limiting the movement of water in the reservoir while stimulating the bottom-hole zones of the reservoir will significantly increase the efficiency of field development.
The paleoreconstruction of sedimentation conditions at Beshpagirskoe deposit of the Stavropol Krai based on the results of pebble morphology investigation
Authors: Sherstyukov M P , Kerimov A-G G , Saltanova A G , Sokolenko E V , Kerimova E G 
Published: November 2020

Abstract
The morphology of pebbles provides important information for lithological-facial and paleogeographic constructions. The shape of the pebbles carries quite a variety of information about the geological processes of the distant past. Today, there is a large number of foreign and domestic studies devoted to the material and granulometric composition of psephites, while much less attention is paid to the morphological characteristics. Although very often it is the shape of the pebbles that can unambiguously resolve the issues of determining their genesis. Debris shape analysis includes the degree of contour rounding or roundness and the ratio of the three axial dimensions of the pebble: length, width and thickness. Based on the ratio of linear dimensions, judgments were made about the genesis of deposits, the direction of flow, the possibility of redeposition. The most popular are two factors: the shape factor of the fragment and the isometric factor. Conclusions: the end result of the genesis of the pebble material of the Beshpagirskiy quarry is the river alluvium of the ancient river network, subsequently rounded and polished in the coastal delta zone of the Sarmatian Sea. The flat-topped uplift of the Stavropol arch in the middle–upper Sarmatian can be considered the source of the supply of coarse-grained material. The research is of great interest for the search for mineral deposits.
The effects of climate change on the development of phytoplankton in the Uchinsk Reservoir of the Moscow Canal
Authors: Suslov S V , Gruzdev V S , Khrustaleva M A , Boitsenyuc L I 
Published: November 2020

AbstractIn the climate of European Russia, there are significant changes: before the year 2010, the tendency of warm period temperature to drop with a simultaneous increase in precipitation was dominated but nowadays it is dominated a reverse trend to increase average and maximum temperatures, decrease in precipitation, and increase in the number of sunny days. This creates the most favourable conditions for the development of phytoplankton and zooplankton consuming it. Our research exemplified by the Uchinsky Reservoir has established that since 2010 the number of phytoplankton has been increasing multiply with the development of blue-green algae at the end of the warm period, and it adversely affects the quality of water, leading to the development of eutrophication processes. The factors limiting the number of phytoplankton are the development of zooplankton and almost total consumption of ammonium nitrogen by phytoplankton. To manage the development of phytoplankton due to the most favourable climate conditions, a set of measures is required to reduce the intake of biogenic elements into the water of the Reservoir.
Degradation and restoration of mountain pastures
Authors: Bekuzarova S , Kozyrev S , Kozyrev A , Luschenko G , Bekmurzov A 
Published: November 2020

Abstract
The destructions which occur in the mountain phytocenosis reduce the adaptive capabilities of plant formation, as a result their productivity, longevity and resistance to adverse factors decrease. The species previously typical of indigenous communities do not find ecological niches. They are on the verge of extinction. This contributes to the degradation of species composition. Various secondary communities become widespread, the whole complex of existence in which differs from the conditions of indigenous communities. In order to study the state of mountain vegetation, phytocenoses were monitored and assessed, taking into account the presence of leguminous components. Vegetation monitoring was carried with regard to the vertical zonation, where the plant species and their disappearance were determined under the influence of anthropogenic and zoogenic factors. The areas with high degradation were determined, where the amount of plant formation increased and the diversity of valuable grass and bean cultures decreased, depending on anthropogenic factors. It was found that the early spring period nutrition of growing plants with the biological product Nikfan promotes the increase in the fodder mass of plants, ensuring their growth and full development. In our experiments, the doses of the biological product in a concentration of 0.1% were justified, creating favorable conditions for the development and growth rate of crops and beans.
Assessment of the fauna reserve "Bragunsky" in conditions of anthropogenic transformation of ecosystems and measures for its optimization
Authors: Batkhiev A , Avtaeva T , Jamalova M , Saparbayeva L , Kushalieva Sh , Arsanukaev D , Kaimov M 
Published: November 2020

Abstract
The article presents the materials of bioecological studies on the fauna state of biological reserve "Bragunsky", located in the plains of the Chechen Republic, the assessment of the degree of anthropogenic transformation, as a result of increased agricultural and manufacturing activities of the population in some parts of the reserve, the assessment of the current state of landscapes and biotopes, developed under the influence of anthropogenic transformation. The results of a comprehensive survey and inventory of the composition and species distribution of vertebrate and invertebrate animals are described. The article describes the characteristics of ecological and faunal groups, the representation of rare and protected species about anthropogenic changes. We used methods of cartography, multimedia modeling of satellite images, accounting for the number of species and their ecological and faunal analysis. Based on the research, based on the assessment of the results of anthropogenic changes, a justification was made for changing the current boundaries of the reserve, optimizing its territory and removing from the reserve some areas that are most anthropogenically transformed and are not of value for the composition of species and their protection. Practical recommendations are given.
Scientific bases of biodiversity conservation in the conditions of educational and experimental farm of GBPEI “Ufa Forestry Technical College”
Authors: Bilalova E G , Gazieva E M , Aslyamova E R , Ishmuratova M M , Sadykova F V 
Published: November 2020

Abstract
The Article is devoted to the methods of biodiversity conservation in the educational and experimental farm of GBPEI “Ufa Forestry Technical College”, where a collection of resource species of different climatic zones is preserved. The main decorative-deciduous, beautiful-flowering, wild-growing, fruit, medicinal species and families of the collection are presented, their generalized characteristic is given. Some results of studying of features of biology and reproduction at introduction in the open and closed soil in the context of the southern Urals are given.
Flora and vegetation of the Sulem Reservoir (Middle Urals)
Authors: Baktybaeva Z , Yamalov S , Golovanov Y , Gabidullina G 
Published: November 2020

Abstract
The study of biodiversity of anthropogenically disturbed areas is a prerequisite for assessing and predicting species abundance in regions. The present research aims at investigating the aquatic and coastal-aquatic flora and vegetation of the Sulem reservoir, built on the territory of the Visimsky nature reserve. Phytocoenotic material has been processed in accordance with the requirements of ecological-floristic classification of Braun-Blanquet. Flora analysis has been carried out in compliance with standard floristic methods. The study has revealed a variety of vegetation, which has been classified into 2 classes (Potamogetonetea and Phragmito-Magnocaricetea), 5 orders (Potamogetonetalia, Callitricho hamulatae-Ranunculetalia aquatilis, Phragmitetalia, Magnocaricetalia, Oenanthetalia aquaticae), 6 alliances (Nymphaeion albae, Potamogetonion, Ranunculion aquatilis, Phragmition communis, Magnocaricion elatae, Eleocharito Palustris-Sagittarion Sagittifoliae), 20 associations and 2 rankless communities. Communities of associationsElodeetum canadensis, Myriophylletum spicati and Callitrichetum hermaphroditicaeare the most common in the territory under study. Large areas are covered with Sagittario sagittifoliae-Sparganietum emersi, Typhetum latifoliae and Typha intermedia. Communities of associations Potamo crispi-Ranunculetum trichophylli, Potamogetonetum graminei, Potamo natantis–Polygonetum natantis
Typhetum angustifoliae and Sparganietum erecti are less common. Flora of vascular plants include 66 species from 43 genera and 26 families. Cyperaceae (10 species), Poaceae (8 species), Potamogetonaceae (6 species), Ranunculaceae (4 species), and Typhaceae (4 species) are the leading families. Hydrophytes prevail among ecological groups. Eurasian boreal species prevail in the geographical structure of the flora. 2 species listed in the Red Book of the Sverdlovsk region include Nuphar lutea (L.) Smith u Nymphaea candida J. Presl.
Current state of biota of the Urus-Martan forest reserve of the Chechen Republic
Authors: Batkhiev A M , Avtaeva T A , Skripchinsky A V , Dzhamalova A Z , Saparbayeva L M , Kushalieva Sh A , Arsanukaev D D , Baisarova Z T 
Published: November 2020

Abstract
The article studies the state of biota in the Urus-Martan forest reserve located in the Chechen Republic, the degree of its anthropogenic transformation as a result of agricultural and production activities. A comprehensive bioecological analysis of flora and fauna was carried out, rare and protected species were assessed in terms of anthropogenic changes in the reserve. The methods of cartography, multimedia modeling of satellite images, accounting for the number of species and ecological-faunistic analysis were used. Changes in the reserve borders optimizing the reserve territory were described. Practical recommendations were provided.
Ecological aspects and analysis of ecotypes of kochia prostrate (Kochia prostrata (L.) Schrad)
Authors: Nidyulin V N , Sangadzhieva S A , Staselko E A , Germasheva Yu S , Mushaeva K B 
Published: November 2020

Abstract
Over the past few decades, the state of the land in the arid zones of Russia is developing extremely unfavorably due to irrational pasture use. One of the ways to solve the problem is the development of halophytes in culture to create different varieties (as fodder) and restore saline soils. Halophytes (galos – salt, phyton – plant) is a special group of ecologically and physiologically adapted plant species that are able to maximize their potential in conditions of severe salinity. Halophytes – being useful as fodder, medicinal and oil-bearing plants – have a powerful environment-forming function and the ability to desalt saline soils. One of such halophytes is kochia prostrate. This is a pasture high-protein forage crop that has a number of nutritional properties, is well eaten by many animal species (in particular, cattle and small cattle), and is also promising for use in phytomelioration on natural pastures in arid regions of Eurasia, Africa and America. Fodder based on kochia prostrate is well balanced regarding amino acid composition (lysine, methionine, threonine, etc.), thereby is an excellent fattening feed. Therefore, it is important to understand, from the point of view of selection, on what type of soil will Kochia grow favorably and give the maximum yield for creating new varieties. This article presents the results of comparing the feed and seed productivity of three ecotypes of the xerogalophytic fodder half-shrub of kochia prostrate (Kochia prostrata (L.) Schrad).