bluuebunny/crossref_metadata_2025_split huggingface dataset:
Main directions of the study of plant invasions in Russia
Authors: Tokhtar Valeriy K. , Vinogradova Yulia K. , Notov Alexander A. , Kurskoy Аndrey Yu. , Danilova Elena S. 
Published: January 2022

AbstractThis article is focused on the analysis of major approaches to plant invasion research used by Russian researchers. They fall within three main groups: 1. Conventional approaches to floristic analysis based on the Russian scientific tradition of floristic research, 2. Approaches focused on the study of the fraction of invasive flora, making blacklists and regional Black books, 3. New comprehensive approaches based on a synthesis of methods used in botany, geo-information technology and population genetics. Multivariate statistical methods allow for the visualization of various data, including those on alien species group structures in various regions. They make it possible to identify boundaries of ecological niches occupied by plants in respect to climate-and-environmental or ecological variables. An assessment of current statistical interdependence between alien plant characteristics and scores of factors limiting their dissemination facilitates the making of predictive models of plant invasion. Examples of multivariate statistical methods used in invasion biology were analyzed, along with different approaches to the study of the variability of alien species. Alien and invasive fractions of the flora of the Trans-Siberian Railway were analyzed not by administrative units but by natural biomes. This approach allowed us to assess the correlation between the number of invasive species with different natural-climatic and floristic characteristics of biomes. The publication of "Black Books" of various administrative subjects of Russia according to a unified methodology allowed us to make an inventory of invasive species over the vast territory of the country. The experience gained by Russian researchers may be further used for developing universal approaches to plant invasion research.
Monitoring of the atmospheric corrosivity by resistive sensors
Authors: Kreislova K. , Vlachova M. 
Published: January 2022

Abstract
Atmospheric corrosivity is classified according to EN ISO 9223 Corrosion of metals and alloys – Corrosivity of atmospheres – Classification, determination and estimation. For the determination and estimation of the corrosivity category, standardized approaches are used. Monitoring of corrosivity with the application of various sensors is an actual trend. The paper gives results of verification of some types of sensors for this monitoring with standardized flat samples at atmospheric test sites in the Czech Republic. The trend of decreasing atmospheric corrosivity is evident in the last decade. Monitoring of the corrosion rate and mapping of the corrosivity become a very important step in preventing failures in long-term atmospheric exposition. This type of monitoring was used on bridge construction to estimate the seasonal effect of de-icing salts deposition, too.
Enigmatic clusters of sandstone boulders on plateaus of the Stołowe Mountains (Sudetes, south-west Poland) – their geoheritage and geotouristic value
Authors: Migoń Piotr , Parzóch Krzysztof 
Published: January 2022

Abstract
Among sites of geomorphological interest in the tableland of the Stołowe Mountains, consisting of clastic sedimentary rocks of Late Cretaceous age, are enigmatic occurrences and clusters of sandstone boulders within plateau levels that are underlain by mudstones and marls. These boulders are allochthonous, having been derived from the quartz sandstone beds that support the upper plateau level and stratigraphically are in excess of 50 m above the altitudinal position of the boulders. Topographic conditions preclude long-distance transport from the escarpment slopes; boulders are hypothesised to be the last remnants of completely degraded outliers (mesas) of the upper plateau. Their present-day altitudinal position is explained by passive ‘settling’ following disintegration of caprock and denudation of the underlying weaker rocks. Two localities are here presented in detail, Łężyckie Skałki and Pustelnik, along with adjacent boulder trains in the valleys incised into the plateau. It is argued that both localities have considerable geoheritage value and both play the role of geosites, although on-site facilities are so far limited. However, the complex history of boulders sets a series of challenges for successful geo-interpretation.
Teaching scientific method to primary school pupils by using the example of adaptation of secondarily aquatic animals to the marine environment
Authors: Antczak Mateusz 
Published: January 2022

Abstract
Science classes in public schools are usually strictly linked to several subjects and taught by reference to the reading-listening model. Non-formal educational institutions and events such as ‘children universities’ and science fairs (and to some degree also some private schools) implement elements of interdisciplinary teaching of science and learning through experiments and the use of scientific methods. Workshops conducted within non-formal educational structures prove that only is this method engaging and understandable to primary school pupils, it also is possibly much more effective than the traditional learning style for coding information and explaining common misconceptions in teaching evolution, palaeontology and biodiversity. The example of a scenario for science classes presented here (the so-called ‘aquatic problem’, i.e., adaptations of primarily terrestrial animals – amniotes – to the aquatic environment) uses simple props, such as everyday items, to address the problems that teachers in public school face. Thus, it can be implemented independently of school budgets and availability of school equipment.
Efforts to Disrupt the Authoritarian Equilibrium within the EU. Effects and Counter-effects
Authors: Juhász Krisztina 
Published: January 2022

Abstract
The study, leaning on the concept of ‘authoritarian equilibrium’ introduced by R. Daniel Kelemen on the one hand, and new intergovernmentalism as a fresh theoretical approach of the European integration on the other hand, investigates if we can talk about the disruption of the ‘authoritarian equilibrium’ as a consequence of the split up between Fidesz and the EPP, and the adoption of the rule of law conditionality mechanism. In other words, whether we can talk about an initial authoritarian dis-equilibrium? Or can we rather talk about a converse process due to the mechanisms of new intergovernmentalism resulting in the further stabilisation of authoritarian governments and the ineffectiveness of the EU measures devoted to the protection of rule of law? Using qualitative resource analysis of the relevant secondary literature and the documents and legal acts of the EU and its institutions the paper comes to the conclusion that while we have witnessed efforts to disrupt the partisan and the financial support of the Hungarian governing party, these efforts were neutralised by the mechanisms of new intergovernmentalism and as a consequence we still cannot talk about an initial authoritarian disequilibrium in the EU.
Experimental and numerical study of the behavior of a stone column subject to the loading effect
Authors: Houda Haouam , Salah Messast 
Published: January 2022

Abstract
The realization of engineering structures in compressible sites, requires in-depth geotechnical reconnaissance, as well as a study of the mechanical behavior of the soil, in order to adapt suitable soil improvement solutions. This is the case with the Annaba viaduct in Algeria, where it was found during the site survey that the soil is poor and very compressible. The foundations in these soils eventually pose the problem of their low bearing capacity and significant settlement. This, therefore, leads to the choice of reinforcement techniques. Among the many methods of improving soils, we have selected the stone column technique. The object of our article is to study the behavior of these columns, in terms of settlement and, through the loading tests on real site, we have found out that the intermediate columns are stiffer and more confined than the bank columns and the percentage reduction in settlements of these two types is important. Then, this experimental study is validated by the Plaxis 2D software, where the configurations are studied to find the best model that approximates the real behavior of the reinforced soil.
An attempt to apply the kinematic method of rigid solids in the study of bearing capacity of shallow foundations
Authors: Bencheikh Messaouda Boutahir Born , Aidoud Assia , Zohra Benamara Fatima , Lazhar Belabed , Meriem Dorbani 
Published: January 2022

Abstract
In the geotechnical engineering field, shallow foundations are frequently needed to ensure good fieldwork stability. They are also intended to permanently and uniformly transmit all load pressure on the seating floor. However, numerous mechanical constraints, such as bearing capacity of foundations, durability, stability, design of shallow foundations, lead, unfortunately, to a serious realization challenge. Finding an adequate solution presents the main goal and effort of both scholars and professionals. Indeed, the corresponding drawback is observed through the high number of reported damages that occurred in the structure of foundations and the punching failure.
The failure mechanisms of shallow foundations, verified in full size or on scale models, show “sliding surfaces” and rigid (solid) blocks, which can be described with the kinematic method of rigid solids.
The main objective of this study is the application of the kinematic method of rigid solids in the study of the stability of shallow foundations with respect to punching, the purpose of which is to determine the bearing capacity factors Nc, N
γ, and the passive earth pressure coefficient Kp of foundations. In this context, two mechanical models have been proposed with 5 and 7 rigid solids, and a program developed via the MathCAD environment is applied to check the validity of the two previous models. The kinematic method of rigid solids gives results very close and comparable with that of Caquot/Kerisel for the factors of the bearing capacity and passive earth pressure coefficient - the ratio Kp - according to the five- and seven-solid model.
Assessing an effective collaboration in higher education: A study of students’ experiences and challenges on group collaboration
Authors: Lailiyah Malikhatul , Setiyaningsih Lian Agustina , Wediyantoro Prilla Lukis , Yustisia Karlina Karadila 
Published: January 2022

Studies emphasize that collaboration remains an essential part of learning and working in the 21st century. This study seeks to report on the group collaboration of higher education students. Using Explanatory sequential mixed method design, this study tried to discuss the students’ experiences and challenges on group collaboration environment in the online learning cases. Adopting Razmerita and Kirchner's (2014) questionnaire, 287 students involved in this study. The result indicated that overall students performed positive perception on group collaboration. In addition, to have deep analysis, 15 students were interviewed. This study contributes to an understanding of how students perceived collaboration and how they explain the obstacles recognized in their classes.DOI: 10.26905/enjourme.v6i2.6971
Theoretical Issues with Rayleigh Surface Waves and Geoelectrical Method Used for the Inversion of Near Surface Geophysical Structure
Authors: Çakır Özcan , Coşkun Nart 
Published: January 2022

We numerically simulate the field measurements of Rayleigh surface waves and electrical resistivity in which the target depth is set to be less than 50-m. The Rayleigh surface waves are simulated in terms of fundamental mode group and phase velocities. The seismic field data is assumed to be collected through a conventional shot-gather. The group velocities are found from the application of the multiple filter technique in a single-station fashion while for the phase velocities the slant stacking, or linear radon transform are applied in fashion of multichannel analysis of surface waves (MASW). The average seismic structure from the source to the receiver (or geophone) is represented by the group velocity curve while the average seismic structure underneath the geophone array is represented by the phase velocity curve. The single-station group velocity curves are transformed into local group velocity curves by setting a linear system through grid points. The shear-wave velocity cross section underneath the examined area is constructed by inverting these local group velocity curves. The electrical resistivity structure of the underground is similarly studied. The field compilation of the resistivity data is assumed to be completed by the application of the multiple electrode Pole-Pole array. The actual resistivity assemble underneath the analyzed area is inverted by considering the apparent (measured) resistivity values. Unique forms such as ore body, cavity, sinkhole, melt, salt, and fluid within the Earth may be examined by joint interpretation of electrical resistivities and seismic velocities. These formations may be better outlined by following their distinct signs such as high/low resistivities and high/low seismic velocities. Doi: 10.28991/HEF-2021-02-03-01 Full Text: PDF
Analytical Solution of Unsteady-state Forchheimer Flow Problem in an Infinite Reservoir: The Boltzmann Transform Approach
Authors: Adeyemi Temitayo Sheriff 
Published: January 2022

For several decades, attempts had been made by several authors to develop models suitable for predicting the effects of Forchheimer flow on pressure transient in porous media. However, due to the complexity of the problem, they employed numerical and/or semi-analytical approach, which greatly affected the accuracy and range of applicability of their results. Therefore, in order to increase accuracy and range of applicability, a purely analytical approach to solving this problem is introduced and applied. Therefore, the objective of this paper is to develop a mathematical model suitable for quantifying the effects of turbulence on pressure transient in porous media by employing a purely analytical approach. The partial differential equation (PDE) that governs the unsteady-state flow in porous media under turbulent condition is obtained by combining the Forchheimer equation with the continuity equation and equations of state. The obtained partial differential equation (PDE) is then presented in dimensionless form (by defining appropriate dimensionless variables) in order to enhance more generalization in application and the method of Boltzmann Transform is employed to obtain an exact analytical solution of the dimensionless equation. Finally, the logarithms approximation (for larger times) of the analytical solution is derived. Moreover, after a rigorous mathematical modeling and analysis, a novel mathematical relationship between dimensionless time, dimensionless pressure, and dimensionless radius was obtained for an infinite reservoir dominated by turbulent flow. It was observed that this mathematical relationship bears some similarities with that of unsteady-state flow under laminar conditions. Their logarithm approximations also share some similarities. In addition, the results obtained show the efficiency and accuracy of the Boltzmann Transform approach in solving this kind of complex problem. Doi: 10.28991/HEF-2021-02-03-04 Full Text: PDF
Investigation of Petrographic and Diagenetic Properties of Asmari Reservoir Cap Rock, SW Iran
Authors: Abbasi Samira , Pourmorad Saeid , Mohanty Ashutosh 
Published: January 2022

Many problems in the production and development of oil fields lie in the correct and accurate assessment of the reservoir cap rock. Ramshir oil field is located 130 km southeast of Ahvaz and is one of the most important oil fields in the southwest of the country. To evaluate the petrographic and diagenetic properties, 300 thin microscopic sections were studied. According to petrographic studies, it was found that the cap rock in Ramshir oil field is composed of more evaporative sediments (mainly anhydrite with some gypsum) with some non-evaporative sediments (marl, carbonate and bituminous shale). The most important diagenetic processes in the study area were considered to be dolomitization, cementation, compaction, anhydrite, recrystallization and substitution. Petrographic and diagenetic studies suggest a swamp-swamp environment for this environment. Lithological changes are a sign of hot, humid, hot and dry weather during sedimentation of the cap rock of this field. Doi: 10.28991/HEF-2021-02-03-06 Full Text: PDF
As Práticas Educativas e a relação com a evasão escolar no PROEJA nas dissertações de Mestrado sobre esse tema disponíveis na BDTD.
Authors: Costa Júlio César , Domingues Luís Augusto da Silva 
Published: January 2022

Práticas educativas podem motivar os alunos e influenciar na permanência escolar? Este estudo tem como pressuposto que a maneira como se dão as práticas educativas e pedagógicas durante os processos de ensino aprendizagem contribuem para permanência do aluno na escola, apresentando a evasão também como consequência de práticas que interferem no processo de aprendizagem. A evasão no PROEJA, objeto de estudo abordada em trabalhos acadêmicos em forma de dissertação de mestrado, disponíveis na Biblioteca Digital de Teses e Dissertações contêm apontamentos que contribuem com a averiguação dessa hipótese, mas sem descartar o papel que o meio social exerce sobre esses indivíduos. Através desse recorte foi possível averiguar como esse problema foi abordado nessas pesquisas e a relação que se revelam com as Práticas Educativas, constatando-se que essa suposição é verdadeira, exigindo uma postura diferente das instituições e dos educadores desse programa, aperfeiçoando e adotando práticas educativas inovadoras e significativas que possam contribuir com maior engajamento dos estudantes, melhor aproveitamento na assimilação dos conteúdos abordados e também na contraposição da evasão escolar nessa modalidade.
Serbuk Biji Asam Jawa (Tamarin Dusindica L) untuk Pengelolaan Limbah Industri Cair Tempe (Studi Kasus Mataram)
Authors: Fitriah Leny , Agustini Dwi 
Published: January 2022

Most of the tempe industry have not been equipped with a waste water treatment unit. It is usually a water soaked soybeans and soybean excess water is still discharged directly in the into the environment. Liquid waste industrial of tempeh contain high organic materials. One of the process for wastewater treatment is coagulation with the addition of a positively charged polyelectrolyte in tempeh wastewater as negatively charged. One of plants in Indonesia that can be used as an alternative coagulant is tamarind seeds (Tamarindus indica, L).it can be used for wastewater treatment is more economical. The aims of this experiment is to determine the optimum stirring time, optimum pH of the waste and optimum coagulant dosage for treatment of the tempeh wastewater with coagulant tamarind seed powder. The experiment studied were stirring time, the pH of thetempeh wastewater and coagulant dosage to the percentage decrease in turbidity and COD (Chemical Oxygen Demand). The variables in the experiment were stirring time (10,15, 20, 25 and 30 minutes), the pH of the waste (3; 3.5; 4; 4 and 5) and the dosage of tamarind seed powder (100, 300, 500, 700, and 900 mg / L). COD testing methods is closed reflux method by spectrophotometry and turbidity testing using Turbidimeter. The results showed that the with coagulant tamarind seed powder effectively lowered cod levels and the dryness of tempeh liquid industrial waste. The optimum pH obtained is pH 4, optimum stirring time is 25 minutes and the increase in optimum coagulant dose is 500 mg with a percentage decrease in COD levels and noise by 90.57% and 78.94%.
Key words: liquid waste; sour power; turbidity; COD
KEADILAN GENDER DALAM ISLAM (Telaah Atas Diskursus Hak Rujuk Perempuan dalam Hukum Keluarga Islam)
Authors: Aziz Muhammad , Fahruddin Ahmad Hanif 
Published: January 2022

Religius teachings that are considered to have long oppressed womenthe teachings that have been domination by men have been used as a justification for community perception that are very detrimental to women.however,this criticism of gender inequality in discusseions with human rights does not only return to the misperception of the people.feminists also maintain a great deal about the concept of humen rights it self.fundamental criticism by questioning the return of international law to its maker. The qur’an has the principle that men and women are the same as servants, because men and women are created from the same subtance (kholifatullah fiilardh),and the same obligations ( liya’budun) however,in the matter of reconciliation,the ulama’ agree that reconciliation is an absolute right of the husband. In the gender perspective if you see some possible understanding that women can submit referals as their right to their husband by conducting a new analysis of the issue of referral rights’ which so far has been suggested to be dominated by men ( husband) by redeeming the rights of husband who was given to him. And with the khulu’ also the wife also has the right to the right of reconciliation to the husband who has dropped divorce on him.
PENGARUH PENGGUNAAN MODEL PEMBELAJARAN KOOPERATIF TIPE JIGSAW TERHADAP HASIL BELAJAR MAHASISWA
Authors: Lubis Riri Syafitri 
Published: January 2022

<p class="AfiliasiCxSpFirst" align="left"><strong>Abstrak:</strong></p><p class="AfiliasiCxSpMiddle"> Tujuan penelitian ini adalah untuk mengetahui pengaruh penggunaan model pembelajaran kooperatif tipe <em>jigsaw</em> terhadap hasil belajar aljabar linier mahasiswa. Adapun populasi dalam penelitian ini adalah seluruh mahasiswa semester III Program studi Fisika, Fakultas Sains dan Teknologi, Universitas Islam Negeri Sumatera Utara. Sedangkan sampel dalam penelitian ini adalah mahasiswa Fis 1 semester III yang berjumlah 38 mahasiswa. Penelitian ini menggunakan metode <em>experimental design</em> dengan jenis <em>pretest</em> dan <em>posttest one group design</em>. Penelitian ini mengambil desain eksperimen yang hanya melibatkan satu kelompok tanpa kelompok pembanding. Dari hasil penelitian diperoleh bahwa &gt; yaitu 55,53 &gt; 4,11 maka persamaan garis regresi tersebut menunjukkan signifikan dan dapat disimpulkan bahwa terdapat terdapat pengaruh model pembelajaran koperatif tipe jigsaw terhadap hasil belajar aljabar linier mahasiswa semester III Program studi Fisika, Fakultas Sains dan Teknologi, Universitas Islam Negeri Sumatera Utara.</p><p class="AfiliasiCxSpMiddle" align="left"> </p><p class="AfiliasiCxSpLast" align="left"><strong>Kata Kunci</strong>:</p><p>Model Pembelajaran Kooperatif Tipe Jigsaw, Hasil Belajar, Aljabar Linier</p><p> </p><p class="AfiliasiCxSpFirst" align="left"><strong><em>Abstract:</em></strong></p><p class="AfiliasiCxSpMiddle"><em>The purpose of this study was to determine the effect of using the type of jigsaw cooperative learning model on student linear algebra learning outcomes. The population in this study were all third semester students of Physics Study Program, Faculty of Science and Technology,</em> <em>State Islamic University of North Sumatra. While the sample in this study were 38 students of the third semester of Fiscal 1. This study used experimental design with the type of pretest and posttest one group design. This study took an experimental design involving only one group without a comparison group. From the results of the study, it was found F<sub>count</sub> &gt; F<sub>table</sub> that 55.53&gt; 4.11, the regression line equation shows significant and it can be concluded that there is an effect of the jigsaw cooperative learning model on the learning outcomes of the third semester students of the Physics Study Program, Faculty of Science and Technology, State Islamic University of North Sumatera.</em></p><p class="AfiliasiCxSpMiddle"><em> </em></p><p class="AfiliasiCxSpLast" align="left"><strong><em>Keywords</em></strong><em>:</em></p><em>Jigsaw Type Cooperative Learning Model, Learning Outcomes, Linear Algebra</em>