bluuebunny/crossref_metadata_2025 huggingface dataset:
Surface structure of Amur region high grade native gold
Authors: Radomskiy S. M. , Radomskaya V. I.
Published: April 2021

The purpose of the research is to study the surface structure of high grade gold. The subject of research is gold ore fields in the Amur region. The object of the study is samples of native high grade gold grains from these fields. The study uses the methods of thermodynamics and X-ray electron microscopy. The study results in revealing a multilayer structure of the surface of high grade minerals of the Amur region native gold with the following levels: a boundary layer with zero oxidation degree Au0 in the form of yellow metallic gold; an oxide layer with the oxidation degree Au+1in the form of purple Au2O; an oxide layer with the oxidation degree Au+3in the form of a yellow-brown Au2O3; a hydrated oxide layer with the oxidation degree Au+3in the form of a red-yellow-brown Au(OH)3. The methods of electron microscopy have allowed to identify external surface structures – dense oxide layers of the form of Au2O3and loose hydrated layers of the form of Au(OH)3, whereas the inner layers of metallic and monovalent gold are not visible. Important thermodynamic characteristics of the presented levels are the values of standard oxidation-reduction potentials (E°), which determine their physicochemical properties: for metallic gold E° = +1.68 V; for the oxide layer with the oxidation degree Au+1in the form of Au2O – E° = +0.32 V; for the oxide layer with the oxidation degree Au+3in the form of Au2O3– E° = +1.36 V; for the hydrated oxide layer with the oxidation degree Au+3in the form of Au(OH)3– E° = +0.7 V. The results of the conducted studies indicate that the surface structure has several layers that lower the oxidation-reduction potential, which explains the generation and formation of migratory forms of gold in humid hypergene conditions of natural environment.
Using a wavelet medium for computer-aided controlling the movement of unmanned vehicles along quarry routes
Authors:   T. F. Gorbachev Kuzbass State Technical University, Kemerovo, Russia, Chicherin Ivan V. , Fedosenkov Boris A. ,   T. F. Gorbachev Kuzbass State Technical University, Kemerovo, Russia, Syrkin Ilia S. ,   T. F. Gorbachev Kuzbass State Technical University, Kemerovo, Russia, Sadovets Vladimir Iu. ,   T. F. Gorbachev Kuzbass State Technical University, Kemerovo, Russia, Dubinkin Dmitrii M. ,   T. F. Gorbachev Kuzbass State Technical University, Kemerovo, Russia
Published: April 2021

Introduction. It is established that the most effective tool for monitoring and controlling the dynamics of current trajectories (CT) of unmanned vehicles (UMV) when moving along opencast mine routes in open pit mining is the wavelet transforms technique. Methodology. A detailed analysis of the procedures related to the technology of converting 1D-current trajectory signals (CT-signals) into a multidimensional medium of time-frequency distributions (TFD) is carried out. The Wigner distribution is selected as a working distribution for processing CT-signals. This distribution is considered from the point of view of its ability to represent one-dimensional CT-signals of UMV in an information-intensive and functionally transparent format of specific TFDs. Research results and analysis. On the example of curved routes, the nature of the so-called forward and reverse transients of CT-signals of UMV, formed in the subsystems of external and autonomous control (ECSS and ACSS) of unmanned vehicles, is considered. Mathematical tools are described for wavelet transformations: Gabor wavelet functions, the wavelet matching pursuit algorithm (MP-algorithm), and Cohen’s class time-frequency wavelet distributions. Conclusion. The procedures of processing the trajectory signals with using the means mentioned above make it possible to implement effectively the functions of controlling the UMV movement along current trajectories formed by the system on opencast mine routes.
Functional approach to deterministic finite-state automata systems dynamic modeling
Authors:   Ural State Mining University, Ekaterinburg, Russia., Lapin Eduard S. , Abdrakhmanov Marat I. ,   Ingortech company, Ekaterinburg, Russia.
Published: April 2021

Research aim is to study the functional approach to modeling the deterministic finite-state automata system which is not confined to the elements communication topology and the heterogeneity of the algorithm types. Relevance. The substantial part of engineering systems applied in the mining industry may be described through the finite-state automaton model. They include the mine conveyor systems, shaft signal systems, processing facilities control systems, etc. Such model makes it possible to shorten the time spent on control software development and carry out algorithm analysis, debug, and testing effectively. There are a lot of effective approaches and tools to solve the problem of finite-state automata dynamic modeling, each of which has its own advantages and disadvantages. Methodology. In this article, the methodology of finite-state automata systems modeling is considered as applied to mine conveyor systems. Results. Final-state automata (FSA) models have been developed together with the conditions for FSA systems dynamic modeling as applied to mine conveyor systems. Conclusions. The considered approach to modeling, which involves functors and applicative functors 122 "Izvestiya vysshikh uchebnykh zavedenii. Gornyi zhurnal". No. 2. 2021 ISSN 0536-1028 for structure composition and its operational dynamics study, as well as the possibility to mathematically prove the model’s properties, makes the approach a good alternative when choosing tools for systems models development.
Rock pressure control methods based on detected regularities of stress formation in mining structures
Authors:   Institute of Mining UB RAS, Ekaterinburg, Russia, Zubkov Albert V. , Sentiabov Sergei V. ,   Institute of Mining UB RAS, Ekaterinburg, Russia
Published: April 2021

Relevance. Subsurface mining at the Gaysky ore mine is intensifying because of the growing need in raw material. It leads to rapid increase in the depth of mining and to problems connected with the stability of mining system constructive elements. The effi ciency of the Gaysky deposit underground development is largely determined by mining system constructive elements stability. Ore cave-in in the chambers of the fi rst and second stages causes the growth of load in the interchamber pillars leading to their collapse, loss of boreholes and development headings. Mining productivity in the chambers of the fi rst, second, etc. stages falls, oversize yield grows, which also impairs the effectiveness of mining. Hanging wall and footwall cave-in in the deposit under consideration may be explained not only by host rock poor stability, but also by the presence of high compressive tectonic stresses, that were determined by the authors. Stress measurements in the rock mass have shown that the east-west stresses have doubled the northsouth stresses and have been 1.5 times as high as the vertical ones. The purpose of the research is to reduce stresses in stopes ore in place when excavating steeply dipping ore bodies using a sublevel stoping method with a hardening backfi ll. Research methodology includes full-scale experimental measurements of the stress state of the rock mass and ore in place at accessible depths and horizons of the deposit. A comprehensive scientifi c research method was used, including the analysis and theoretical generalization of stress distribution regularities in the arrays of the extracted chamber reserves and mathematical modeling of the behavior of the research object; theoretical results were compared with the results of instrumental observations. The analysis of the research results made it possible to establish the stress-strained state behavior in the course of mining. It was revealed that when mining a deposit using sublevel stoping, the most loaded elements are the hanging wall and footwall exposed parts, ceiling, interchamber pillars and bottom. Therefore, it is necessary to take measures to increase ore in place stability in order to guarantee the safety and effi ciency of the mineral extraction technology. Conclusions. Relieve slots method is among the most effective and frequently used active method of rock mass pressure control. The method has come into common use because it is easy to apply. Main labor inputs of a relieve slot creation are only reduced to extra drilling and blasting which do not require additional tunnel driving. The aim of the relieve slot is to create additional free surfaces for deformation, to redistribute rock mass stress-strain state, and remove stress from the protected element of the mining system.
Assessing the seismic effect of quarry blasting at surface mineral workings on the state of underground mines using PRESS 3D URAL software
Authors:   Saint Petersburg Mining University, Saint Petersburg, Russia, Kolganov Artem V. , Sidorov Dmitrii V. ,   Saint Petersburg Mining University, Saint Petersburg, Russia
Published: April 2021

Relevance. The development of numerical and analytical methods of assessing ore in place dynamic overload from quarry blasting impact is due to the need to improve the reliability of underground mines stability analysis. Research aim is to assess the effect of blasting at surface mineral workings on underground mines stability and safety. Research methodology includes the numerical and analytical analysis of dynamic stress within ore in place containing underground mines based on the boundary integral equations method in spatial formulation. Research results. Under conditions of dynamic impact made by quarry blasting, the stability of underground mines may be preserved by means of strengthening the support through bolting with reinforced concrete roof bolts. Summary. The proposed method makes it possible to adjust the value of underground mines factor of safety with the account of the dynamic impact made by quarry blasts.
Engineering and geological zoning of the Malmyzhsky deposit weathering crusts (Svoboda area)
Authors:   Ural State Mining University, Ekaterinburg, Russia, Bobina Tatiana S.
Published: April 2021

Introduction. Interest in the study of weathering crusts arose at a time when geological engineers faced the problem of developing open pits formed by eluvial soils. However, the exact and detailed division of the weathering crusts into engineering-geological zones, especially when studying mineral deposits, is not given due attention even today. Therefore, in the course of prospecting, it is important to correctly determine weathering crust type and profile, and establish the possibility of changing the engineering and geological conditions when opening the rock mass by mine workings for further slope stability prediction of the designed mining structures. Research aim is to determine vertical engineering-geological zoning of the Malmyzhsky deposit weathering crusts (Svoboda area) and identify patterns in alluvial deposits physical and mechanical properties change, which define the safety of mine development. Methodology. A significant number of Russian and foreign scientists have considered the formation of weathering crusts from different positions. They established the geochemical zoning and engineeringgeological zoning of the weathering crusts. Results. The article describes the Svoboda area at the Malmyzhsky gold-copper-porphyry deposit. Engineering and geological zoning of the weathering crust section was carried out according to a set of features, including structural and textural features, mineral composition, physical and mechanical properties of rocks. Within it, three zones are identified at the Malmyzhsky field, the Svoboda area: IV – dispersed, III – litomarge, and II – clastic. Physical and mechanical properties of rock building up the considered weathering crust have been analyzed proving that change in geological conditions within even one zone of the Malmyzhsky gold-copper-porphyry deposit (Svoboda area) entails a change in the choice of projected pit wall angles.
Digitization of subsoil use technologies
Authors:   Ekaterinburg, Russia, Khopunov Eduard A.
Published: April 2021

Introduction. Economy digitalization trends show that industries involved in mineral extraction and processing will sooner or later have to face the challenges of introducing new management technologies. Expected innovations deal with large amounts of data both in terms of object initial state characteristics and in tracking changes in its parameters at all stages of raw material transformation into a marketable product. Research methodology includes assessing factors determining industry digitalization, as well as studying production area readiness for new management technologies introduction. The difficulty is that mineral raw material extraction and processing is represented by a set of technologies. Exploration, deposit 78 "Izvestiya vysshikh uchebnykh zavedenii. Gornyi zhurnal". No. 2. 2021 ISSN 0536-1028 description, reserves assessment, processing technologies, utilization and storage of tailings, dumps, reclamation, etc. – all these processes belong to different branches of science and are not always linked into a single technological cycle. Results. The paper provides a detailed analysis of the structure and sources of information flows required to form a unified digital model of mineral processing. It is shown that the data unit responsible for the “ore processing procedures databases” is the least ready to be embedded in a single digital model. Conclusions. Despite the many problems associated with the use of digital technologies, there are no fundamental obstacles to mineral raw material processing simulation models creation, including deposit identification, rock mass formation and all stages of obtaining a commercial product.
Improving the technology of manganese ore X-ray radiometric separation
Authors:   Irkutsk research institute of noble and rare metals and diamonds (Irgiredmet), Irkutsk, Russia., Vishniakov Aleksei V. , Fedorov Iurii O. ,   Irkutsk research institute of noble and rare metals and diamonds (Irgiredmet), Irkutsk, Russia., Chikin Andrei Iu. ,   Irkutsk State University, Irkutsk, Russia.
Published: April 2021

Introduction. In addition to the classical methods of manganese ore processing, a lower-cost and more environmentally friendly technology of X-ray radiometric separation (XRS) has been developed in the last twenty years. The technology has been embraced by enterprises and applied to improve the efficiency of manganese deposits development. The article provides original results of the research carried out by Irgiredmet institute concerning the development of the procedure and technology of manganese ore XRS. Research methodology. The XRS methodology is based on the X-ray fluorescence (XRF) method of elements detection common in geophysical practice. A methodological task of these method is to find manganese in ore containing not only manganese but also iron, as soon as the two elements possess characteristic X-ray radiation (CXR) close in energy and mutually affect the accuracy of their detection by the X-ray fluorescence analyzers. The chosen research methodology allowed developing a new way of keeping records of the elements when solving the problems of manganese ore sampling and sorting. Research results. A new and efficient algorithm of sampling manganese and iron has been developed and tested on different types of manganese and ferromanganese ore. The ratio of CXR of the detected elements to the total sum of the scattered radiation (SR) and these elements CXR intensity set by a special spectral coefficient k is such universal criterion which promotes to more accurate detection of manganese and iron content in lumps.
Characterizing magnesite heavy-media separation screenings as promising technogenic raw materials
Authors:   Nosov Magnitogorsk State Technical University, Magnitogorsk, Russia, Smirnov Andrei N. , Grishin Igor A. ,   Nosov Magnitogorsk State Technical University, Magnitogorsk, Russia, Masalimov Aleksei V. ,   Nosov Magnitogorsk State Technical University, Magnitogorsk, Russia
Published: April 2021

Introduction. This article discusses the possibility of using technogenic raw materials for the production of magnesia and magnesium oxide. The analysis of domestic industry supply with magnesite and magnesian raw materials is presented. Man-made minerals, such as magnesite screenings, produced in the course of heavy-media separation of ore, are noted to be a promising source of this type of raw material. It has been established that this type of raw material is poorly studied. Research methodology. The applied research methods were substantiated to establish the amount and form of magnesium oxide in the magnesite screenings of the Satka deposit. Results and discussion. A significant amount of both current and accumulated screenings at the site in Satka and their chemical composition allow us to consider them as a promising technogenic raw material for magnesium oxide production. The work has determined the distribution of magnesium oxide by size classes. On the basis of elemental analysis, it was decided to recognize the object under study as a suitable mineral for processing. The thermogravimetric analysis of magnesite screenings made it possible to establish the forms of magnesium oxide in the material. Conclusions. Analysis of the results obtained allows us to assert the possibility of processing the studied technogenic raw materials, but the presence of magnesium oxide in the composition of solid solutions with calcium carbonate predetermines the use of chemical enrichment methods.
Análisis de zonas de cultivo y cuerpos de agua mediante el cálculo de índices radiométricos con imágenes Sentinel-2
Authors: Pech May Fernando , Sánchez Hernández Julio Victor , Sánchez Jacinto Honorio
Published: April 2021

Los cultivos y cuerpos de agua son un tema de interés para los países. Tener información sobre las zonas de cultivo, fuentes de agua y su comportamiento en las distintas temporadas del año es de utilidad para la producción agrícola y para la toma de decisiones. Por otra parte, actualmente se han generado gran cantidad de datos satelitales de la Tierra y herramientas para el procesamiento de grandes volúmenes de imágenes satelitales que son fundamentales para el monitoreo forestal, análisis multitemporal de zonas de cultivo y cuerpos de agua, clasificación del uso del suelo, entre otros usos. Sentinel-2 es un programa de observación de la Tierra que consta de 13 bandas espectrales que proporcionan imágenes de alta resolución espacial y calidad radiométrica. En este artículo se presenta un análisis multitemporal basado en el Índice de Vegetación de Diferencia Normalizada y el Índice de Agua de Diferencia Normalizada, obtenidos con imágenes del satélite Sentinel-2, para la identificación de cambios que se presentan en una zona del sureste de México en el periodo 2018-2020. Los resultados obtenidos demuestran un bajo rango del índice radiométrico en las áreas de estudio durante el 2018. Asimismo, los mayores cambios durante la temporada de lluvia fueron registrados en 2018; esto evidencia la provocación en la disminución en la calidad de los cultivos y en el cuerpo de agua.
Analysis of bolted ultra-high performance concrete joints
Authors: Echavarría César , Cañola Hernán , Echeverri Wilmar
Published: April 2021

El hormigón de ultra-alto desempeño (UHPC) es un material compuesto con una notable capacidad de autocompactación y una alta resistencia a la compresión. Actualmente, la construcción de prefabricados en UHPC, debido a sus propiedades excepcionales, es considerada como una opción interesante en los proyectos de ingeniería civil. El desarrollo de métodos prácticos y confiables para el diseño de conexiones con pernos de elementos en UHPC ha sido considerado como un factor crucial en futuros proyectos de construcción. En este artículo, se estudian las concentraciones de tensión y los modos de falla frágiles en conexiones con pernos de paneles UHPC. Los resultados experimentales son comparados con una solución analítica que estima las concentraciones de tensión usando las propiedades elásticas de los materiales anisotrópicos y la geometría de las conexiones. Se analizan la influencia de la distancia al borde y de las propiedades elásticas de las placas UHPC en el desarrollo de fallas en conexiones con pernos. La solución analítica propuesta en esta investigación considera ecuaciones de forma cerrada que pueden ser usadas para evaluar las concentraciones de tensión en la conexión. Los resultados de laboratorio en conexiones con pernos de paneles UHPC se ajustan a las predicciones del modelo analítico. Un modelo analítico teórico es sin duda un precursor para cualquier estudio experimental o numérico de conexiones con pernos de elementos de hormigón de ultra-alto desempeño.
Katedrán a történelem sodrásában
Authors: Gortva János
Published: April 2021

Vincze Beatrix (2018). Tanári életutak a 20. század második felében. Budapest: ELTE Eötvös Kiadó.
Development of a Simple and Fast Procedure Based on Acid Dilution for Determination of Macro and Microelements in Guarana-Based Beverages by ICP OES
Authors: da Silva Vinnícius Henrique , da Silva Jr. André Luiz , Santos Herick , Lôbo Ivon , Bezerra Marcos , de Jesus Raildo
Published: April 2021

A simple analytical procedure is proposed for the direct analysis of guarana-based beverages in order to determine nutrient elements by inductively coupled plasma optical emission spectrometry (ICP OES). A Box-Behnken design, combined with Derringer’s desirability function, was applied to the simultaneous optimization of the ICP OES radiofrequency (RF), sample volume and nitric acid concentration. Using this approach, optimal conditions were established as RF power of 1.40 kW, and 5.0 mL of sample diluted twice with 0.5 mol L-1 HNO3. The optimized procedure allowed the determination of Cu, Fe, Mn, Zn, K, Ca, S, P and Mg with limits of quantification of 10.0, 2.0, 0.6, 6.0, 66.0, 65.0, 235, 40.0 and 20.0 μg L-1, respectively. Accuracy of the method was evaluated through analysis of water standard reference material (SRM NIST 1643f) and by additionrecovery experiments, in which satisfactory recoveries were obtained. The procedure was applied for the analysis of guarana-based soft and energy drinks. The concentration ranges (mg L-1) were: 0.36‑43.3 (Ca), 4.04-192 (K), 0.36-44.8 (Mg), 10.1-1,073 (S), 0.04-92.4 (P), < 0.010-0.0174 (Cu), < 0.002-0.294 (Fe), < 0.006-0.06 (Zn) and < 0.0006-0.168 (Mn).
A Soft Approach to Counter Radicalism: The Role of Traditional Islamic Education
Authors: Ma'arif Syamsul , Sebastian Leonard C. , Sholihan Sholihan
Published: April 2021

This study sheds light on the identity of Islamic education in Indonesia and Singapore to fight against radicalism. This study focuses on comparing Indonesia and Singapore in awakening multicultural consciousness, particularly on philosophical and practical religious education. The crisis of ideology faced by Muslim society in the world has an impact on the genesis of religious movements that legitimate violence and terrorism. This study is based on the sociological perspective and aimed at knowing the philosophical and practical construction of Islamic education in Indonesia and Singapore. The focus of this study is on preventive and persuasive deradicalization. Religious education institutions in both countries have multi principles and practices of education, which is implemented particularly in preventing Islamic ideology that teaches violent values and terrorism. Anticipating the development of understanding radicalism, in both countries, Islamic education has formulated policies that are accommodating with universal values and cosmopolitanism of Islamic civilization. Such efforts are implemented by pesantren and madrasah in Indonesia and Singapore to build harmony among fellow human beings and transmit the character of egalitarian, democratic, humanist, inclusive, and civilized.
Nationalism in Balinese Kiai’s Poems: A Discourse Analysis
Authors: Rizal Efri Arsyad , Rahman Luthfi , Fa'atin Salmah
Published: April 2021

The paper discusses the teachings of nationalism by KHR. Ahmad al-Hadi bin Dahlan al-Falaky in his poems. This research tried to explore aspects of local wisdom and accordingly to figure out the values of nationalism within the poems of a traditional Kiai living in the Balinese society where the majority were Hindu’s people. Data were primarily sourced and collected from “Kumpulan Sya’ir KHR. Ahmad al-Hadi bin Dahlan al-Falaky (1895-1976).”It uses discourse analysis to reveal the meaning of the poems. This finding shows that the poems firmly teach and emphasize the values of nationalism to society. In this regard, such values are vital to fostering the people’s nationalism for living side by side and in harmony with “the others” in the Balinese local context to the Indonesian national context and dealing with the challenging globalized ways of life.
Political Promises in the Lens of Islamic Theology and Jurisprudence: A Case Study of Surabaya Mayor Election 2020
Authors: Sholeh M. Asrorun Niam
Published: April 2021

This research studied the status of political promises declared by Mayor candidates of Surabaya election 2020 during their campaigns started from September 26, 2020. It was field-library research with qualitative analysis. Data were collected by observing online media that particularly reports the election's campaign activities. They were then analyzed by using Islamic theology and jurisprudence approaches combined with structural-functionalism, symbolic interactionism, and social contract theories. It found four main remarks: first, Quranic verses and Prophetic traditions as theological underpinnings have definitely guided moral standards of Islamic politics, especially how to make such political promises. Secondly, the political realism of promises is a language of transactional politics and communication practice. Thirdly, political promises could only be legitimated by fulfilling strike pre-requirements and within very urgent conditions. Finally, the legal status of political promises must be contextual and conditional.
Review of model-based and data-driven approaches for leak detection and location in water distribution systems
Authors: Hu Zukang , Chen Beiqing , Chen Wenlong , Tan Debao , Shen Dingtao
Published: April 2021

Leak detection and location in water distribution systems (WDSs) is of utmost importance for reducing water loss, which is, however, a major challenge for water utility companies. To this end, researchers have proposed a multitude of methods to detect such leaks in WDSs. Model-based and data-driven approaches, in particular, have found widespread uses in this area. In this paper, we reviewed both these approaches and classified the techniques used by them according to their leak detection methods. It is seen that model-based approaches require highly calibrated hydraulic models, and their accuracies are sensitive to modeling and measurement uncertainties. On the contrary, data-driven approaches do not require an in-depth understanding of the WDS. However, they tend to result in high false positive rates. Furthermore, neither of these approaches can handle anomalous variations caused by unexpected water demands.
Teatro Cultura Artística: a recuperação de um patrimônio
Authors: Rosane Martins de Pietro  , Rita de Cássia Giraldi
Published: April 2021

Este artigo trata do processo de reconstrução do Teatro Cultura Artística, inaugurado em 1950 em São Paulo. Com projeto arquitetônico de Rino Levi e mosaico do artista plástico Emiliano Di Cavalcanti, o teatro modernizou o padrão das salas de espetáculo e propiciou a popularização da cultura na região central da cidade. Em decorrência de um incêndio ocorrido em 2008, o edifício sofreu perda estrutural, mantendo íntegra somente sua fachada voltada para o espaço público, identificada pela memória paulistana no painel modernista de Di Cavalcanti. Fundamentada nas etapas do processo de tombamento histórico do teatro, a análise aqui apresentada discute correntes de preservação, técnicas de restauração e políticas de revitalização urbana praticadas na atualidade.
Turismo e patrimônio cultural: revisitando uma polêmica típica por meio de pratos típicos
Authors: Lucas Graeff  , Alexandra Marcella Zottis
Published: April 2021

Este trabalho trata da dinamização de produtos e práticas gastronômicas pela categoria patrimônio com vistas ao turismo cultural. Trata-se de um artigo comparando as propostas de patrimonialização do menarosto e do galeto al primo canto como pratos típicos de dois municípios do estado do Rio Grande do Sul, no sul do Brasil. O argumento é de que a patrimonialização desses pratos responde à reprodução social do grupo e, por consequência, as dimensões econômica e simbólica não se contradizem necessariamente. Nos dois casos estudados, essas duas dimensões imbricam-se na produção de uma narrativa civilizacional de persistência, de duração e de um sentido identitário comum.
Patrimônios e sociedade: desafios ao futuro
Authors: Carlos Fortuna
Published: April 2021

No mundo de hoje tudo muda e se renova velozmente, exceto a convicção de que este mundo, por ser um só, permanece um universo inalterado. Vestígios históricos, como as ruínas, porém, tendem a demonstrar como essa mudança é naturalizada quando resulta do lento correr do tempo e dos usos demorados das coisas. Um pouco por todo o lado pontuam marcas de trajetos passados plurais, umas gastas pela erosão do tempo e outras pela mera antecipação da decadência. Umas remetem a histórias urbanas e públicas, ou também os ambientes familiares e domésticos, enquanto outras prenunciam o presente ou mesmo o possível futuro coletivo. Como lidar com elas? Ou seja, como viver os sinais do envelhecimento de edifícios, bairros, cidades e países e as paisagens de envelhecimento, decadência e mesmo ruína?
A coleção etnográfica de cerâmicas caseiras de Guilherme Tiburtius – cultura material e história da região de Araucária (PR)
Authors: Rosane Patricia Fernandes  , Dione da Rocha Bandeira
Published: April 2021

Este artigo trata de parte da Coleção Etnográfica de Cerâmicas Caseiras Guilherme Tiburtius, coletadas em municípios do entorno de Curitiba (PR) no início dos anos 1940, discutindo especificamente as peças provenientes do município de Araucária (PR). O estudo tem como objetivo compreender o conjunto cerâmico etnográfico coletado no município de Araucária (PR), buscando elucidar a origem dessas cerâmicas e seu contexto cultural, com base em estudos bibliográficos e documentais com utilização de fontes históricas e etnológicas acerca daquela coleção, partindo da publicação “Äletere Hauskeramiikaus der Umgebung von Curitiba, Paraná, Südbrasilien”, de Guilherme Tiburtius (1968), e dos cadernos de inventário desse arqueólogo. O trabalho de pesquisa realizado auxiliou o desvelar de um passado cultural híbrido e miscigenado, que merece outras investigações e novos olhares para o precioso acervo histórico e patrimonial daquela região, a fim de dar voz ao que a cultura material é capaz de revelar.
Nostalgia em rede: sentimentos patrimoniais compartilhados por meio do Facebook
Authors: Luiz Fernando Klug  , Ilanil Coelho  , Diego Finder Machado
Published: April 2021

Este artigo problematiza, com base no conceito de nostalgia, duas comunidades virtuais do Facebook que abordam ideias de passado das cidades de Joinville e São Francisco do Sul, no estado de Santa Catarina. Com o fenômeno da globalização, que altera as noções de tempo e de espaço, a ideia de comunidade passa a ser vista como um refúgio. O medo de um futuro incerto faz com que essas comunidades remetam seu olhar para o passado, o qual, de maneira romantizada e nostálgica, representa um mundo perdido que deveria ser retomado. Comunidades virtuais, como a “Joinville de ontem” e “São Francisco do Sul e suas histórias”, tendem a exaltar um passado da cidade e acabam ressignificando patrimônios culturais. Os patrimônios da cidade passam a ser símbolos de uma suposta identidade coletiva local em risco de desaparecer. As discussões entre os membros das comunidades virtuais também podem levar à “invenção” de novos patrimônios, ao apontar bens culturais da cidade que consideram importantes e que querem ver preservados e/ou patrimonializados. Assim, pretende-se identificar e discutir quais as relações dessas comunidades virtuais e de seus membros com os patrimônios das respectivas cidades e quais os seus impactos no compartilhamento de sentimentos patrimoniais.
Palimpsestos na paisagem: mudanças nas práticas da rizicultura no bairro Vila Nova (Joinville, SC)
Authors: Alanna Fernandes Duarte  , Mariluci Neis Carelli
Published: April 2021

A rizicultura na cidade de Joinville (SC) difundiu-se ao longo do tempo na paisagem por meio de diferentes saberes e práticas de cultivo. Desde a chamada “revolução verde”, propagada na segunda metade do século XX, foram modificadas as técnicas dos agricultores, as quais também repercutiram em outros discursos acerca das práticas de cultivo e das paisagens da rizicultura. Numa cidade que é formada por inúmeros migrantes, o cultivo do arroz foi associado principalmente como paisagem e patrimônio cultural de descendentes de “italianos” no bairro Vila Nova. Contudo compreendemos a paisagem como um palimpsesto; ela pode ser questionada por meio de diversas narrativas, saberes e práticas, pois são as paisagens dinâmicas e socialmente constituídas pelos grupos humanos e sua relação com o meio ambiente. Nesse viés, o trabalho propõe uma abordagem interdisciplinar apresentando um levantamento sobre vestígios materiais e fontes escritas sobre migrantes e rizicultura na cidade com o objetivo de analisar nesses documentos algumas das principais mudanças nas práticas da rizicultura e no bairro Vila Nova.
Ofício das biscoiteiras: patrimônio cultural imaterial da cidade de Pará de Minas – Minas Gerais
Authors: Ana Carolina Ferreira Guimarães  , Daniela Alves Minuzzo
Published: April 2021

A Lei Municipal n.º 5.064 de 19 de agosto de 2010, que instituiu o registro de bens culturais de natureza imaterial do município de Pará de Minas (MG), reconheceu o ofício das biscoiteiras como patrimônio cultural e imaterial local. Apesar de não ser possível datar com precisão o surgimento de tal trabalho, tem-se conhecimento de registro desse saber há pelo menos três gerações. Esta pesquisa buscou investigar como se mantém, na atualidade, o ofício das biscoiteiras em Pará de Minas (MG), com base em análise documental e em entrevistas com biscoiteiras locais e um especialista com participação central no processo. Os resultados destacam a centralidade feminina na execução da tarefa e a perpetuação desse saber, com inserção recente de alguns poucos homens na realização do trabalho. Evidenciaramse também as distinções entre as produções caseiras e comerciais do ofício das biscoiteiras, com certas dificuldades de manutenção dele na atualidade. Alguns esforços para a sua perpetuação foram observados por parte do poder público municipal, porém de forma ainda insuficiente para conferir o suporte necessário para as biscoiteiras e as biscoitarias. Constata-se a relevância do processo de salvaguarda do ofício para a sua perpetuação e para manter vivo esse saber nas novas gerações, tendo o repasse de parcela do ICMS Cultural como uma das políticas fundamentais de municipalização da proteção do patrimônio cultural.
Juvenile trabecular ossifying fibroma in association with multiple mandible deciduous teeth: an atypical case report
Authors: Rafael Correia Cavalcante  , Camila Lago  , Luiz Eduardo Baglioli  , Aline Costa Vaz  , Aimee Simonetto  , Mariana Dalledone  , Allan Fernando Giovanini  , Rafaela Scariot
Published: April 2021

Ossifying fibroma is a benign fibro-osseous lesion characterized by the formation of a cellular fibrous connective tissue stroma with cementum-like material and/or osseous components. The juvenile variant is reported to be an aggressive lesion in paediatric patients. Its poor symptomatology contrasts with its highly aggressive behaviour in maxillary or mandibular region. Objective: The aim of the present study is to report a case of an atypical ossifying fibroma in association of multiple deciduous teeth. Case report: A nine years-old girl was referenced to the Oral and Maxillofacial Surgery Service at Positivo University by the Paediatric Service after radiographic confirmation of a round lesion in lower left mandible region. Imaginological examination revealed a well-defined, round, with multiple radiopaque foci associated with the roots of deciduous molars and with root of first permanent mandibular molar of the left side. Lesion embedded the root and crown of the unerupted second left premolar, suggesting that the tumour arouse from it. After incisional biopsy, histopathological analysis suggested the trabecular pattern of juvenile ossifying fibroma. Surgery was conducted through an intra-oral approach. Incision was drawn in gingiva from the left lateral inferior incisor region until the unerupted second molar region, finished with a relaxing incision. A round tumour in association with the unerupted permanent premolars, which were also extracted, was removed in its entire extent by enucleation. Histopathological analysis confirmed the previous diagnosis of juvenile trabecular ossifying fibroma. Peripheral ostectomy was conducted to diminish chances of lesion relapse. Conclusion: 16 months follow-up showed no lesion recurrence.
The Main Receptors Involved in the COVID-19: A Systematic Review and Meta-Analysis
Authors: Câmara Alice Barros , Brandão Igor Augusto
Published: April 2021

Objective:

This review aims to study the receptor's family and functions most
related to COVID-19 infection and also suggest the tissue and cell location on which the
majority of COVID-19 receptors are mainly expressed.

Methods:

This systematic review is according to PRISMA guidelines. PubMed,
Cochrane, SciELO, Lilacs, Web of Science, and DOAJ databases were used. Clinical
trials and research articles studying receptors related to COVID-19 were included in this
review. R programming language was used to elaborate charts and receptors network,
and SPSS(26v) software was used to perform statistical analysis (PROSPERO:
CRD42020210643).

Results:

The majority of studies on the involvement of receptors in COVID-19 included
plasma receptors and G protein-coupled receptor families (p<0.05). These receptors are
highly expressed in the brain (24%) and 80% of them can interact with each other in a
protein network, exerting some regulatory effects on various tissues. The main influential
receptor in the network of receptors involved in the COVID-19 was the EGFR and the
majority of receptors were associated with pathological processes of the disease
(p<0.05), including the amplification of inflammatory responses in COVID-19, which
may be related to neurological disorders in some cases. Studies on receptors involved in
the COVID-19 included mainly patients from the United States, Spain, and Brazil
(p<0.05).

Conclusions:

Plasma receptors and G protein-coupled receptors, especially the EGFR, involved
in pathological effects of the COVID-19 inflammatory process in the brain have
shown significant importance in this review.
MicroRNAs as Biomarkers in Hypertrophic Cardiomyopathy: Current State of the Art
Authors: Angelopoulos Andreas , Oikonomou Evangelos , Vogiatzi Georgia , Antonopoulos Alexios , Tsalamandris Sotirios , Georgakopoulos Christos , Papanikolaou Paraskevi , Lazaros George , Charalambous Georgios , Siasos Gerasimos , Vlachopoulos Charalambos , Tousoulis Dimitris
Published: April 2021

Background:

Hypertrophic Cardiomyopathy (HCM) is the most common inherited
Cardiomyopathy. The hallmark of HCM is myocardial fibrosis that contributes to
heart failure, arrhythmias and sudden cardiac death.

Objective:

Currently, there are no reliable serum biomarkers for the detection of myocardial
fibrosis, while cardiac magnetic resonance (CMR) is an imaging technique to detect
myocardial fibrosis. MicroRNAs (miRNAs) have been increasingly suggested as biomarkers
in cardiovascular diseases. However, in HCM there is as yet no identified and
verified specific circulating miRNA signature.

Methods:

We conducted a review of the literature to identify the studies that indicate the
possible roles of miRNAs in HCM.

Results:

From studies in transgenic mice with HCM, miR-1, -133 may identify HCM in
the early asymptomatic phase. Human miR-29a could be used as a circulating biomarker
for detection of both myocardial hypertrophy and fibrosis in HCM, while it could also
have a possible additional role in discrimination of hypertrophic obstructive cardiomyopathy
from non-obstructive HCM. Additionally, miR-29a-3p is associated with diffuse myocardial
fibrosis in HCM, while miR-1-3p could discriminate end-stage HCM from dilated
cardiomyopathy and left ventricle dilation. Another role of miRNAs could also be the
contribution in the differential diagnosis between HCM and phenocopies. Moreover, miRNA-
targeted therapy (miR-133 mimics) is promising in inhibiting cardiac hypertrophy,
but this is still in the early stages.

Conclusion:

A more reliable and specific signature of miRNAs is expected with forthcoming
studies in samples from HCM patients and correlation of miRNAs with CMR
and serum markers of fibrosis may implicate novel diagnostic and therapeutic pathways.
Preclinical Drug Discovery in Colorectal Cancer: A Focus on Natural Compounds
Authors: Rahman Heshu Sulaiman
Published: April 2021

Background:

Colorectal cancer (CRC) is considered one of the most predominant and deadly cancer globally. Nowadays, the main clinical management for this cancer includes chemotherapy and surgery; however, these treatments result in the occurrence of drug resistance and severe side effects, and thus it is a crucial requirement to discover an alternative and potential therapy for CRC treatment. Numerous therapeutic cancers were initially recognized from natural metabolites utilized in traditional medicine, and several recent types of research have shown that many natural products own potential effects against CRC and may assist the action of chemotherapy for the treatment of CRC. It has been indicated that most patients are well tolerated by natural compounds without showing any toxicity signs even at high doses. Conventional chemotherapeutics interaction with natural medicinal compounds presents a new feature in cancer exploration and treatment. Most of the natural compounds overwhelm malignant cell propagation by apoptosis initiation of CRC cells and arresting of the cell cycle (especially at G, S, and G2/M phase) that result in inhibition of tumor growth.

Objective:

This mini-review aimed to focus on natural compounds (alkaloids, flavonoids, polysaccharides, polyphenols, terpenoids, lactones, quinones, etc.) that were identified to have anti-CRC activity in vitro on CRC cell lines and/or in vivo experiments on animal models.

Conclusion:

Most of the studied active natural compounds possess anti-CRC activity via different mechanisms and pathways in vitro and in vivo that might be used as assistance by clinicians to support chemotherapy therapeutic strategy and treatment doses for cancer patients.
Multitarget Directed Ligand Approaches for Alzheimer’s Disease: A Comprehensive Review
Authors: Ramalakshmi Natarajan , R.S Remya , C.N Nalini
Published: April 2021

Background:

Alzheimer’s disease (AD) is a multifactorial neurodegenerative disease, and
a drug which targets a single protein would not provide a cure for this disease. Currently available
drugs for AD are all palliative rather than curative. FDA approved only five drugs for the treatment of
AD, which include tacrine, donepezil, galantamine, rivastigmine, and memantine. Tacrine has been
discontinued due to its hepatotoxicity. The lack of therapeutic effectiveness of the single-target drugs
and multifactorial etiology of AD have led to the design of multitarget directed ligands for AD.

Objective:

The researchers in this field are constantly making efforts to develop a drug which may
prove to be the exact cure for this disease by exploring the different biological targets associated with
AD. The present review comprises various multitarget approaches and tools used for finding out a
lead compound or a new drug, which will provide a cure for AD.

Methods:

We have scrutinized and reviewed 75 research articles published in various peer reviewed
journals in the last two decades in the field of multi target directed ligand approaches for the discovery
of a new therapeutic agent for AD.

Results:

The review highlights the recent advances in the field of AD research and shows that the
battle for the discovery of an effective drug for AD is in process and AD still remains an incurable
disease for which treatment is just palliative.

Conclusion:

The review might be helpful for researchers working on multi target directed ligands against AD.
The Current and Forecasted Status of Type 2 Diabetes in the Arab Society of Israel
Authors: Zalan Abdelnaser , Sheikh-Muhammad Ahmad , Khatib Mohammad , Sharkia Rajech
Published: April 2021

Background:

Diabetes mellitus (DM) is considered one of the main causes of mortality, morbidity, and health care expenditures. Effectively treating this disease is of crucial importance and imposes a global challenge. The incidence of Type 2 DM (T2DM) is rapidly rising in both developing and developed countries. The Arab community in Israel is a distinct ethnic group with unique characteristics. Recently, this community has undergone major changes in its lifestyle, adopting the Westernized one, which could have caused an increase in the T2DM incidence rate.

Objective:

This review aims to shed light on various studies undertaken to explore the prevalence of diabetes and determine its current status in the Arab society of Israel, resting on previous and current data. It is presented to highlight the status of diabetes globally and to focus on its current situation in the Arab society of Israel, attempting to forecast its direction in the upcoming decade.

Methods:

Data were obtained from our previous comprehensive socio-economic and health cross-sectional surveys for successive periods from 2004 to 2017. These surveys were conducted on the Arab society of Israel by the Galilee Society.

Results:

Our results showed a progressive increase in the prevalence of T2DM from 3.4% to 7.6% in the Arab society of Israel. This trend is expected to continue rising in the coming decade, and based on our predictions, may exceed 12% in 2030.

Conclusion:

Substantial and practical health-related actions must be initiated to prevent an increasing
number of adults from developing diabetes and its complications.
Development of guidelines for integrating English language education and intercultural education in Japan
Authors: Kurihara Fumiko
Published: April 2021

Speaking a second language is an invaluable skill but it involves more than just learning linguistic skills. This is because language and culture are inextricably linked and it is therefore important to understand the cultural context of a language's origins. What is more, an understanding
of the culture can help a language learner to pick up on the nuances and more quickly learn a foreign language. Professor Fumiko Kurihara and Professor Natsue Nakayama are proponents of the importance of cultural learning when learning a language. They are the members of the JACET SIG on English
Language Education and are working to increase cultural competences among students learning a foreign language. Having spent time abroad in England as a college student, Kurihara became aware of cultural differences that highlighted the inextricable links between culture and language and the
need to explore how cultures shape how we communicate with one another. Kurihara and Nakayama are interviewing teachers and observing lessons in Japan and Europe in order to develop guidelines for language teachers to incorporate and assess lessons in intercultural competence. Next, the researchers
will analyse English textbooks at primary schools using cultural descriptors with a view to assisting teachers with revising their syllabuses and incorporating more intercultural learning.