bluuebunny/crossref_metadata_2025 huggingface dataset:
EN LUGARES DE MEMÓRIA OBRAS FONOGRAFICAS “MINAS” E “GERAES” DE MILTON NASCIMENTO
Authors: Souza Alberto Carlos de , Figueiredo Túlio Alberto Martins de
Published: October 2021

Esta obra, con la propuesta de conducir el concepto de lugares de memoria, se realiza un estudio de dos obras fonográficas de Milton Nascimento, "Minas" y "Geraes", puesto en marcha, respectivamente en 1975 y 1976 y se considerados críticos por el día como la mejor traducción del "movimiento" Clube da Esquina en sus propuestas, las representaciones culturales, la musicalidad y la poesía como expresión de la autonomía del grupo (no hay que olvidar que el propio Milton, a pesar de su Inglés roto, se haciendo la fama en el extranjero y no se asimila las influencias de música más actual en Norteamérica y Europa). Estas obras se generó un contexto en el que Brasil fue un momento de fuertes presiones políticas, debido a que Milton Nascimento y sus compañeros se dan cuenta el tiempo para cantar en "Minas" en el canto, sus raíces en la minería y en "Geraes" cantar, al tiempo que incorpora elementos de la musicalidad de América Latina.

PALABRAS- CLAVE

Milton Nascimento, música popular brasileña, Lugares de la memoria.
A função extrafiscal do tributo enquanto vetor das políticas públicas: a juventude brasileira na agenda política
Authors: Dupont Fabiano Rodrigo , Diehl Rodrigo Cristiano
Published: October 2021

O objetivo com o presente estudo é analisar a função extrafiscal do tributo enquanto vetor das políticas públicas voltadas para a garantia dos direitos fundamentais da juventude brasileira. Diante desse cenário, são pontuados e discutidos o atual papel do poder público na construção de políticas públicas efetivadoras dos direitos da juventude. Cotejados estes aspectos, apresenta-se a finalidade extrafiscal da norma tributária como mecanismo de implementação de políticas públicas. E a partir disso, analisa-se a possibilidade e o desenvolvimento de políticas públicas com o intuito da inclusão social de jovens no cenário brasileiro. Para tal feito, utiliza-se o método hipotético-dedutivo, através de levantamento bibliográfico.
Vivências sexuais de mulheres jovens usuárias de crack
Authors: Aguiar Cibele Maria Duarte de , Menezes Jaileila de Araújo
Published: October 2021

O estudo objetivou analisar as vivências sexuais de mulheres jovens usuárias de crack e as repercussões em suas vidas. Partimos da perspectiva do construcionismo social e utilizamos a Análise Crítica do Discurso para construir e analisar os dados. Procuramos debater aspectos gerais e a feminilização do uso de crack. Também discutimos a relação entre os marcadores sociais de juventude, gênero e sexualidade que atravessam a vida das usuárias, considerando-as sujeitos de direitos sexuais e direitos reprodutivos. A partir da abordagem qualitativa, realizamos a pesquisa em serviço de acolhimento intensivo para usuárias/os de álcool e outras drogas da cidade do Recife. Utilizamos como método observações participantes e entrevistas semiestruturadas, buscamos também desenvolver um olhar interseccional ao entendimento das situações de desigualdade que perpassam a vida das jovens. Observamos que elas viveram em bairros marcados por dificuldade de acessos a equipamentos de politicas públicas, com grande incidência de violência e tráfico, configurando contexto de miséria e exclusão social. Neste cenário, elas iniciaram o uso de crack e, por algumas vezes utilizaram o corpo para conseguirem droga, vivenciaram situações de riscos diversos. Percebemos também que os vínculos familiares são fragilizados e que o contexto de acolhimento por vezes representa uma possibilidade de reaproximação familiar. As jovens têm planos positivos para suas vidas após a saída da instituição, entretanto, observamos a ausência de projetos profissionais. Acreditamos que uma abordagem psicossocial que as ajude a desenvolver atividades que possam, minimamente, contribuir para a construção de independência financeira colabora na quebra dos ciclos de uso de crack, indicando que este é um importante ponto a se investir no período de acolhimento.
OS DESAFIOS NA CONSTRUÇÃO DE UMA UNIVERSIDADE COMUNITÁRIA: UM OLHAR A PARTIR DA CONDIÇÃO DE REITORA.
Authors: Lúcia de Lima Helfer Carmen
Published: October 2021

A entrevista aborda temas relacionados ao processo histórico de construção de uma Universidade Comunitária, em especial da Universidade de Santa Cruz do Sul (UNISC). A partir de relatos acerca de sua experiência profissional, enquanto professora e gestora na UNISC, a professora Carmen Lúcia de Lima Helfer analisa os diferentes momentos, os diferentes desafios, as dificuldades e as conquistas no trabalho coletivo de construção de uma experiência de Universidade Comunitária no Rio Grande do Sul. A entrevista aborda, também, os caminhos e os descaminhos do ensino superior no Brasil, em especial no último período, quando as mudanças das políticas públicas e direcionadas ao ensino superior no País desafiaram os gestores universitários a mudanças tanto no que diz respeito à gestão administrativa quanto no que diz respeito aos projetos de Universidade que orientam as ações de ensino, de pesquisa e de extensão universitários. Relacionada a essa última temática e provocada pela própria proposta do número especial da Barbarói, a professora Carmen resgata a participação do Departamento de Ciências Humanas na UNISC e o lugar das ciências humanas na formação universitária.
A autoria feminina na espanha contemporânea: O conto “silêncio”, de María Ángeles Barrionuevo Gómez – Uma tradução comentada
Authors: Andreta Bárbara Loureiro
Published: October 2021

Resumo: Este trabalho objetiva apresentar ao leitor brasileiro a tradução inédita do conto “Silêncio”, escrito pela espanhola María Ángeles Barrionuevo Gómez (1967 – ), no outono europeu de 2019. O referido conto propõe um olhar poético para a paisagem outonal, ao mesmo tempo em que reflete sobre a condição humana. O processo tradutório revelou algumas questões teóricas e práticas que serão explicitadas ao longo deste trabalho, segundo as proposições de Tania Franco Carvalhal (1993; 2003).
A doença sem nome: Traduzindo Caio Fernando Abreu
Authors: Cayann Nícollas , Schwarcke do Canto Daniela
Published: October 2021

A crise do HIV/AIDS revelou-se de altos níveis pandêmicos nos anos 1980/1990 acometendo principalmente a comunidade queer. Este período gerou ampla produção artística e literária não só na América do Norte, epicentro da pandemia, mas também na Europa e América Latina. Nesta mesma onda de produção literária se estabeleceu um campo tradutológico que se via responsável por traduzir os reflexos desta pandemia em diferentes regiões. Já um autor conhecido no Brasil, Caio Fernando Abreu, lança a coletânea de contos Os dragões não conhecem o paraíso, em 1988, um romance móbile de 13 contos. O artigo aqui apresentado analisa o conto Linda uma história horrível, buscando estabelecer um diálogo entre a obra em português brasileiro e suas traduções para o inglês, por David Treece em 1990, e para o francês, por Claire Cayron e Alain Keruzoré, em 1991. No conto em questão, o autor estabelece um efeito estilístico, chamado aqui de metáfora predatória, que desempenha um papel importante em narrar a doença sem nome. O artigo trata de aspectos gerais das traduções, mas foca principalmente, utilizando-se dos processos de tradução comparada, em como a metáfora predatória foi ou não preservada em suas versões em inglês e francês, analisando também as implicações narrativas que foram causadas pela sua adoção ou ausência.
Validating Attention Restoration Theory: Testing the Control Effect of the Level of Cognitive Load of Everyday Life and Crowding of a Forest Visited
Authors:   The Tourism Sciences Society Of Korea, Kim Seon-Ah , Kim Min-Joo
Published: October 2021

This study examines the validity of the attention restoration theory by exploring the relationship between perception of recovery environment and psychological effect. It was also investigated whether the level of cognitive load in everyday life and the level of perception of congestion at the place of visit act as a moderating variable. Items to measure the variables were organized based on prior researches, and two preliminary surveys were conducted. The population of the study was tourists returning home after visiting Jangheung-gun Cypress Forest Woodland. The survey was conducted from September 25 to September 26, 2018, and a total of 250 samples were used for the final data analysis. Results show that the perception of the recovery environment had a positive effect on psychological recovery in the case of short-term psychological recovery. In addition, it was found that 'rest and universal attraction' among the components of the perception of recovery environment had the most significant effect on psychological recovery. Although the validity of the attention restoration theory hypothesis was not tested in this study, evidences of this study suggest that the hypothesis could be valid if the cognitive load of daily life was below an appropriate level. Also, findings of this study show that congestion perception in the natural environment has a significant effect on the causal relationship between recovery environment perception and short-term psychological recovery.
Voorgevoelens, vertolkings en verklarings: resepsie van ’n 19de-eeuse ǀxam-kum
Authors: Staphorst Luan
Published: October 2021

Although the field of Bushman studies has seen a number of different disciplines being drawn upon to address key questions, the textual material of the Bleek and Lloyd archive is still relatively understudied. Studies which do approach this material, however, tend to do so through an anthropological and/or archaeological lens, with literary analysis often marginalized. This article, through taking account of considerations of the reception theories developed in literary studies, criticises the various interpretations of a 19th century ǀxam language kum, or narrative. Originally published in Specimens of Bushman Folklore (1911), the kum “Bushman presentiments”, concerning an enigmatic experience narrated by ||kabbo, has led to six distinct interpretations—some of which are in conversation with one another in various ways, but they nevertheless offer differing views. Through a critical review grounded in literary folkloristics and reception theory, the article argues for renewed interest in and study of the kum “Bushman presentiments”. It is argued that future studies need to be based on three factors: disciplinary foregrounding, linguistic analysis, and comparative reading. These three factors, the article concludes, are the most glaring limitations of the existing interpretations, and if taken into consideration they could lead to a proliferation of insight into the kum.
A kiegyezés témája bécsi lapokban
Authors: Rózsa Mária
Published: October 2021

Die Aufnahme des österreichisch-ungarischen Ausgleichs 1867 wird in vier österreichischen Zeitungen von 1867 an bis 1869 untersucht und dargestellt. Der Wanderer  (1814–1873) ließ mehrmals ungarische Interessen des freiheitlichen Kreises um Ferenc Deák zu Wort kommen, dank der Vermittlung zahlreicher ungarischer Mitarbeiter des Blattes. Hier sei bloß der hervorragende ungarische Journalist, Max Falk hervorgehoben werden. Die Herausgeber und Redakteure der zentralistisch-großösterreichischen liberalen Presse waren in erster Linie marktorientiert, sie interessierte vor allem der Gewinn bzw. der Erfolg des Blattes, sie wollten bloß schnell informieren. Die Debatte wurde als Organ der konservativen ungarischen Kräfte gegründet, unterstützte und besprach die Möglichkeiten und Wege des Ausgleichs. Die Neue Freie Presse als eine moderne liberale Zeitung vertrat Ideen des Liberalismus konsequent und  ohne Voreingenommenheit. Ungarn betrachtete sie als einen Bestandteil des Habsburgischen Reiches, sie erhob ihr Wort mehrmals für die Interessen der anderen Nationalitäten und vertrat die Meinung, dass durch den Ausgleich die Ungarn mehrere Privilegien enthielten als die anderen Nationalitäten.
PARTICULARIDADES SOBRE A COVID-19: UMA REVISÃO INTEGRATIVA
Authors: Gottardo Paulo César , Camboim Irla Lavor Lucena , Maehler Alexandre De Lima , Da Franca Pereira Marcos Alexandre , Assis Wanderley Elbia , Cainelli Andreia Cristina Fumagalli
Published: October 2021

A pandemia por COVID-19 desencadeou um impacto imensurável em todas as esferas sociais, ocasionando um panorama global nunca antes vivenciado, principalmente em populações mais vulneráveis, como os idosos. Assim, o presente trabalho foi desenvolvido com o objetivo de realizar uma revisão sobre o Coronavírus principalmente em pacientes idosos. Para isso, realizou-se uma revisão integrativa por meio de uma metabusca na plataforma MEDLINE/PubMed, da qual foram selecionados 40 artigos após um processo de seleção de 8.911 trabalhos encontrados. Foi realizada uma explanação sobre o processo de doença, suas nuances na população de idosos, sua prevenção e os potenciais suportes terapêuticos. Nota-se que o coronavírus tem sua ação inicial relacionada aos receptores ECA-2, ocasionando um potencial inflamatório, com disfunção endotelial e alterações sistêmicas, as quais se associam a outras alterações imunológicas, que tendem a ter um curso variável em pacientes idosos. Estes, em geral, apresentam uma clínica compatível com uma síndrome gripal, embora tenham um maior percentual de casos atípicos, em relação a população em geral, e uma maior tendência a desfechos desfavoráveis, o que apresenta uma estreita relação com as suas doenças crônicas, as quais, em geral, são fatores de riscos independentes para mortalidade em pacientes com COVID-19. Quanto ao tratamento, um suporte ventilatório adequado, com o uso de corticoesteróides na necessidade de oxigênio, segue sendo consensual, enquanto outras terapêuticas mantêm-se contraditórias, necessitando maiores evidências para seu uso em larga escala. Sendo assim, a prevenção, com o distanciamento social, uso de máscaras e, sobretudo, com a realização da vacinação, segue sendo a principal forma de controle da pandemia.
SÍNDROME DE BURNOUT E ATUAÇÃO DO PROFISSIONAL DE EDUCAÇÃO FÍSICA EM CAPS-ad DA PARAÍBA
Authors: Oliveira Leonardo Santos , Tôrres Junior Valdir Andrade , Quirino Natália Maria Mesquita de Lima
Published: October 2021

A Síndrome de Burnout (SB) é um fenômeno ocupacional que afeta milhares de profissionais de saúde no mundo inteiro, cuja prevalência tem sido analisada em diferentes contextos laborais. Contudo, a literatura não aponta trabalhos analisando a SB e os fatores associados a atuação de profissionais de Educação Física junto aos Centros de Apoio Psicossociais álcool e drogas (CAPS-ad). Portanto, este estudo investigou as dimensões da SB e suas relações com características da atuação do profissional de Educação Física em diferentes CAPS-ad da Paraíba. Em um estudo correlacional, profissionais de Educação Física, atuantes nos CAPS-ad de Cabedelo (n= 1), João Pessoa (n= 2), Monteiro (n= 1) e Sousa (n= 1), responderam um questionário autoaplicável composto por três seções: 1) características sociodemográficas; 2) características da atuação profissional; e 3) características de esgotamento profissional (Maslach Burnout Inventory - Human Services Survey). Após análise descritiva [frequências relativa e absoluta, média e desvio padrão ou mediana e intervalo interquartil (IQR)], o relacionamento entre as dimensões da SB e as variáveis relativas à atuação profissional foi verificado pelo coeficiente de Spearman e pelo teste Qui-quadrado. As dimensões de Exaustão Emocional (EE; 60,0%) e Despersonalização (DP; 60,0%) apresentaram baixa prevalência, contudo, observou-se alta prevalência para a dimensão Reduzida realização profissional (RP; 60,0%). Foram constatados valores medianos de 18 (IQR= 11), 6 (IQR= 6) e 33 (IQR= 18) pontos para EE, DP e RP (ineficácia), respectivamente. A dimensão RP apresentou forte relacionamento com renda, tempo de profissão e carga horária total, mas, moderada com tempo de atuação no CAPS-ad. Não foram verificadas associações entre as dimensões da SB e a satisfação com o trabalho (χ2≤3,06; P>0,05). Considerando a baixa prevalência da SB, os profissionais de Educação Física parecem demonstrar uma condição psicológica equilibrada para o atendimento de indivíduos com transtornos pelo uso de álcool e outras drogas.
Electrochemical Evaluation of Catalytic Effect of Aluminum in Oxidation the Paracetamol in Human Blood
Authors: EL Ouafy Hayat , EL Ouafy Tarik , Oubenali Mustapha , EL Haimouti Aziz , Gamouh Ahmed , Mbarki Mohamed
Published: October 2021

The reactivity of paracetamol (Pa) using the carbon paste electrode (CPE) modified by the aluminum (CPE-Al) was reported. The working electrode was prepared by mixing the aluminum with the carbon powder. The optimal potential window was selected from -1.7 V to 1.7 V. The effect of parameters such as pH, scan rate, accumulation time and concentration were affected by cyclic voltammetry (CV) and square wave voltammetry (SWV). The optimal preconcentration time is 8 minutes. The reactivity of Pa on the electroanalysis detector was characterized by the appearance of the anodic peak at 0.25 V in a solution of sodium sulfate (0.1 M, pH 7). The calculated limits of detection and quantification have been 8.28·10-9 and 2.74·10-8 mol L-1, respectively. Then relative standard deviation (RSD) at 2.0·10-5 mol L-1 Pa concentration was 4.08 % for nine repetitions. The analytical application was carried out in the detection of Pa in human blood with satisfying results.
Legal Regulation of Re-Domiciliation in the Russian Federation
Authors: Konduktorov A. S.
Published: October 2021

In summer 2020, the Russian Federation initiated amendments to agreements on double taxation avoidance concluded with foreign States. The President of the Russian Federation outlined the goal of this procedure, namely: to ensure the collection of tax on dividends and other payments in the amount of at least 15%. It is extremely curious that the change in such tax agreements correlates with the legal institution of the re-domiciliation of foreign companies to the Russian jurisdiction (to special administrative regions on the Oktyabrsky and Russian Islands). New provisions of agreements on the avoidance of double taxation in conjunction with the re-domiciliation procedure, as well as the existing mechanism for voluntary declaration of accounts and assets, can potentially bring the fight against offshorization of the domestic economy to a new level.

The aim of the study is to compare the financial and other operating conditions of an international company registered in the order of re-domiciliation in a Russian special administrative region and an organization registered in a “low-tax” (offshore) jurisdiction. To achieve this goal, analytical and comparative legal research methods were used, which made it possible to draw the following conclusions: in the changing circumstances, the Russian special administrative regions are approaching in terms of the conditions for carrying out commercial activities and the volume of financial preferences provided to traditional offshore jurisdictions. However, in order to activate the process of re-domiciliation of foreign companies to the Oktyabrsky and Russky Islands, it is necessary to eliminate the shortcomings of legal regulation by amending the existing regulatory legal acts.
Comparative Jurisprudence and the Establishment of the Content of Foreign Law in the context of Modern Challenges
Authors: Shakhnazarov B. A.
Published: October 2021

In the context of globalization, regional integration of states, free trade, on the one hand, and on the other, in the context of modern challenges associated with various kinds of restrictions (sanctions, restrictions caused by the COVID-19 pandemic, etc.), with the development of technologies, more and more differences are manifested in the legal systems of different states. Comparative jurisprudence contributes to the processes of unification and harmonization, makes it possible to take into account foreign experience in rule-making activities, to achieve an understanding of the norms of foreign law, helps in establishing their content for subsequent law enforcement activities based on the norms of foreign law, in the case when conflict rules refer to foreign law when regulating private law relationships. The implementation of private law relations today has undergone a number of restrictions, but has been transformed taking into account the introduction of information technologies. The role of comparative jurisprudence in understanding the nature of the sources of law, their significance in the regulation of certain social relations is investigated. Some features of establishing the content of the norms of foreign law are analyzed. The paper focuses on the independent establishment of the content of the norms of foreign law by the court, as well as on the peculiarities of attracting experts for these purposes. Modern conditions for the development of information technologies, as well as various kinds of restrictions, serve as a kind of trigger for the development of the comparative legal method in law enforcement.
Refinements to the Graves–Pitarka Kinematic Rupture Generator, Including a Dynamically Consistent Slip-Rate Function, Applied to the 2019 Mw 7.1 Ridgecrest Earthquake
Authors: Pitarka Arben , Graves Robert , Irikura Kojiro , Miyakoshi Ken , Wu Changjiang , Kawase Hiroshi , Rodgers Arthur , McCallen David
Published: October 2021

The main objective of this study is to develop physics-based constraints on the spatiotemporal variation of the slip-rate function using a simplified dynamic rupture model. First, we performed dynamic rupture modeling of the 2019 Mw 7.1 Ridgecrest, California, earthquake, to analyze the effects of depth-dependent stress and material friction on slip rate. Then, we used our modeling results to guide refinements to the slip-rate function that were implemented in the Graves–Pitarka kinematic rupture generation technique. The dynamic ruptures were computed on a surface-rupturing, planar strike-slip fault that includes a weak (negative to low-stress-drop) zone in the upper 4 km of the crust. Below the weak zone, we placed high-stress-drop patches designed to mirror the large-slip areas seen in various rupture model inversions of the event. The locations of the high-stress-drop patches and the hypocenter were varied in multiple realizations to investigate how changing the dynamic conditions affected the resulting rupture kinematics, in particular, the slip rate. From these simulations, we observed a systematic change in the shape of the slip-rate function from Kostrov type below the weak zone to a predominantly symmetric shape within the weak zone, along with a depth-dependent reduction of peak slip rate. We generalized these shallow rupture features into a depth-dependent parametric variation of the slip-rate function and implemented it in the Graves–Pitarka kinematic rupture model generator. The performance of the updated kinematic approach was then verified in 0–4 Hz simulations of the Mw 7.1 Ridgecrest earthquake, which showed that incorporating the depth-dependent variation in the shape of the slip-rate function improves the fit to the observed near-fault ground motions in the 0.5–3 s period range.
ANALYSIS OF THE INTEGRATION POSSIBILITY OF THE ELECTRIC VEHICLES ON BATTERY AND FUEL-CELLS BASE IN TRANSPORT SECTOR OF THE SLOVAK REPUBLIC
Authors:   Technical University of Kosice, Faculty of Manufacturing, Technologies with a seat in Presov, Department of Process Technique, RIMAR MIROSLAV , KULIKOVA OLHA ,   Technical University of Kosice, Faculty of Manufacturing, Technologies with a seat in Presov, Department of Process Technique, KULIKOV ANDRII ,   Technical University of Kosice, Faculty of Manufacturing, Technologies with a seat in Presov, Department of Process Technique, FEDAK MARCEL ,   Technical University of Kosice, Faculty of Manufacturing, Technologies with a seat in Presov, Department of Process Technique
Published: October 2021

The total world energy consumption is permanently growing during last 30 years. Alternative energy sources are one of the best ways to save the environment polluted by the combustion products of gasoline, diesel fuel, and even methane or propane. The main idea of the article is to analyse the possibility and it influence of integration of the electric vehicles on battery and fuel-cells base in the transport sector of the Slovak Republic. This paper highlighted the main challenges associated with usage of battery-based and fuel-available technologies in a transport sector of Slovak Republic.
ASSESSMENT OF FINISH MACHINING AND MASS FINISHING AS POST-PROCESSING METHODS FOR PBF-LB/M-MANUFACTURED 316L
Authors:   Technical University of Munich, Department of Mechanical Engineering, Institute for Machine Tools and Industrial Management,, Fuchs C. , Kick L. ,   Technical University of Munich, Department of Mechanical Engineering, Institute for Machine Tools and Industrial Management,, Leprevost O. ,   Technical University of Munich, Department of Mechanical Engineering, Institute for Machine Tools and Industrial Management,, Zaeh M. F. ,   Technical University of Munich, Department of Mechanical Engineering, Institute for Machine Tools and Industrial Management,
Published: October 2021

Additive manufacturing techniques are increasingly used in industry. However, the direct usage of additively manufactured parts is limited due to their relatively low surface quality. Especially to achieve functional surfaces, post-processing has to be carried out. Post-processing methods include traditional mechanical cutting processes as well as electrical and chemical processes. Since previously deposited material is removed and additional manufacturing time is necessary, post-processing leads to increased manufacturing costs. Therefore, if additive manufacturing is to be competitive with traditional manufacturing processes, choosing the correct post-processing method is vital. Decision parameters, for example, are the achievable surface quality, the amount of material removal, and the preservation of the shape. In this article, the suitability of two traditional manufacturing processes, milling and mass finishing, as post-processing methods for parts from 316L, manufactured with powder bed fusion using a laser beam, is described. It is characterized how the depth of material removal influences the surface quality. For the milling process, it is determined that a depth of material removal of 0.2 mm leads to a stable surface quality. Finally, the processes' effectiveness as post-processing methods is assessed by comparing the achievable surface quality, showing that mass finishing processes are an economic post-processing option in specific cases.
CONTROL STRATEGIES FOR A GANTRY STAGE EQUIPPED WITH FLEXIBLE JOINTS USING FREQUENCY RESPONSE METHODS
Authors:   Technische Universitaet Dresden, Institute of Mechatronic Engineering, Poehlmann P. , Merx M. ,   Technische Universitaet Dresden, Institute of Mechatronic Engineering, Mueller J. ,   Technische Universitaet Dresden, Institute of Mechatronic Engineering, Ihlenfeldt S. ,   Fraunhofer Institute for Machine Tools and Forming Technology IWU
Published: October 2021

Gantry stages, consisting of two parallel acting drives, are a well-known example, where a significant interaction between all control systems’ in- and outputs is present due to structural coupling. Stability issues and therefore the limitation of the bandwidth of the position control can be a consequence of this effect. The adjustment of the systems mechanical properties using compliant joints, as well as the implementation of centralised control strategies are two possible approaches to overcome these issues and to improve the dynamic and static behaviour of the stage. Frequency domain methods for multivariable systems are used for controller tuning to consider properties like the controls’ time delay and high frequency mechanical eigenmodes, which are hard to model otherwise.
PRODUCTION OF INDIVIDUALISED MULTI-MATERIAL COMPONENTS USING A ROBOT-BASED PROCESS CHAIN
Authors:   TU Braunschweig, Institut fuer Werkzeugmaschinen und Fertigungstechnik,, Albergt M. , David M. ,   TU Braunschweig, Institut fuer Werkzeugmaschinen und Fertigungstechnik,, Dross M. ,   TU Braunschweig, Institut fuer Werkzeugmaschinen und Fertigungstechnik,, Reichler A.-K. ,   TU Braunschweig, Institut fuer Werkzeugmaschinen und Fertigungstechnik,, Hoffmeister H.-W. ,   TU Braunschweig, Institut fuer Werkzeugmaschinen und Fertigungstechnik,, Droeder K. ,   TU Braunschweig, Institut fuer Werkzeugmaschinen und Fertigungstechnik,
Published: October 2021

The production of individual work pieces in small to medium batch sizes requires an adaptation of the manufacturing strategy. Particularly, the manufacturing of multi-material components out of metal and plastic is characterized by high production costs as well as high production times. To resolve this challenge, a new, modular process chain for the production of these structures in a single manufacturing cell was developed. In this cell, a robot manufactures multi-material components with multiple end-effectors in several successive process steps. In the first step, interlocking structures are manufactured on a metal part by a surface structuring tool. Afterwards, an extruder is used to add a thermoplastic onto the structured metal part. Due to mechanical interlocking effects, the applied thermoplastic shows improved adhesion behavior. A study was conducted to analyze the achievable joint strength of the additive material application onto the structured metal samples. Investigations to determine the achievable manufacturing quality of a robot guided milling process for multi-material parts have been carried out. A recently developed suction hood is used to capture the metal and plastic chips. In this paper, the results regarding the efficiency of the individual end-effectors, including the extraction hood, are presented and it is demonstrated how they interact within the robot-based process chain.
PERFORMANCE OF DIFFERENT DIAMOND CUTTING TOOLS IN FACE MILLING OF CEMENTED CARBIDE
Authors:   Chemnitz University of Technology, Professorship Micromanufacturing Technology, Nestler A. , Schubert A. ,   Chemnitz University of Technology, Professorship Micromanufacturing Technology
Published: October 2021

More and more forming and punching tools as well as wear parts are made from cemented carbide. The large variety and the geometry of these components are often reasons for finish machining by milling, but the tool wear is very high. For the investigations, end mills with different diamond material tips or coatings are used. The cemented carbide specimens exhibit an average tungsten carbide particle size of 2.5 μm and the binder material is cobalt with a proportion of 20 %. The cutting parameters are kept constant. For all tools a surface roughness depth Rz smaller than 1 μm is achieved. The detailed analysis of the tool wear behaviour and the surfaces allows for an appropriate selection of the cutting material and contributes to an increase of the performance of machining cemented carbides by milling.
HIGH-RESOLUTION SURFACE TEXTURE MEASUREMENTS USING A COLLABORATIVE PICK-AND-PLACE ROBOT
Authors:   Alicona Imaging GmbH, Raaba, Austria, Riedl M. , Danzl R. ,   Alicona Imaging GmbH, Raaba, Austria, Lankmair T. ,   Alicona Imaging GmbH, Raaba, Austria, Millonig F. ,   Alicona Imaging GmbH, Raaba, Austria
Published: October 2021

The ongoing trend of robotics, automation, quality control and its combination are leading to new possibilities in the field of metrology. The improvements, especially in the handling and accuracy of collaborative robotics, are enabling new applications for automated high-resolution optical 3D measurements. This is the basis for the implementation of a pick-and-place solution for automatic surface texture measurements by replacing a high precision x-y stage with a collaborative robot. In this paper two different Focus-Variation setups are compared to evaluate the uncertainty using a certified standard and a real sample.
PERFORMANCE EVALUATION OF (ALCRN) PVD COATED CBN INSERTS ON MACHINING OF INCONEL 718
Authors:   Vellore Institute of Technology, School of Mechanical Engineering, Vellore, India, Jeyapandiarajan P. , Xavior M. Anthony ,   Vellore Institute of Technology, School of Mechanical Engineering, Vellore, India, Anbalagan Arivazhagan ,   Robert Gordon University, Aberdeen, Scotland
Published: October 2021

This research work focuses on the experimental investigations conducted using uncoated cBN tool and (AlCrN) PVD Coated cBN tool for turning Inconel 718. Two different sets of experiments – one with uncoated cBN and another with coated cBN inserts were conducted considering three different levels of cutting speeds, feed rates and depth of cuts. The performance of the coated cBN over the uncoated inserts were evaluated and it was found that the AlCrN coated cBN inserts can produce 10-12% drop in the cutting force, 15% reduction in the flank wear and 10% reduction in the surface roughness.
Performance of Dye Sensitized Solar Cells (DSSCs) with ZnO Nanorod Electrode in Different Seed Solution
Authors:   Department of Physics, Universitas Negeri Malang, Pujiarti Herlin , Astarini Nadiya Ayu ,   Department of Physics, Universitas Negeri Malang, Diantoro Markus ,   Department of Physics, Universitas Negeri Malang, Aziz Muhammad Safwan ,   Department of Physics, Universiti Teknologi Malaysia, Hidayat Rachmat ,   Physics of Magnetism and Photonics Research Division, Institut Teknologi Bandung
Published: October 2021

Studies of comparing the performance of photoelectrode for dye-sensitized solar cells (DSSCs) continue to be carried out and developed. The ZnO nanorods as an electrode for DSSCs have been shown to have high electron collection due to the capability of electron photoexcitation and increased electron transport. Various methods of making ZnO nanorods have been studied and developed. However, the method requires controlled conditions under high temperature and pressure, thus limiting the commercialization of ZnO nanorods. Therefore, the seed solution-based hydrothermal method was chosen in the ZnO nanorod deposition process because it is an effective method, low-cost and easier fabrication process. The method of growing ZnO nanorod was carried out with three times of growing for 6 hours. ZnO nanorod was synthesized using different seed solutions, namely sample 1 and sample 2 by using methoxy and isopropanol, respectively. In this work, the SEM image shows the growth of ZnO nanorods vertically aligned on the FTO substrate and resulted in a smaller diameter for the isopropanol seed solution. The smaller diameter of the ZnO nanorod provides a larger surface area then increasing the total amount of dye attached to the ZnO nanorod and improve the photovoltaic performance.
ASSESSING THE COMPETING ABILITY OF WEEDY RICE (Oryza sativa f. spontanea) WITH CULTIVATED RICE UNDER ELEVATED CO2 CONDITIONS
Authors:   Department of Agronomy, College of Agriculture, Vellayani, Kerala (India)-695522, Anjali K. , Ameena M. ,   Department of Agronomy, College of Agriculture, Vellayani, Kerala (India)-695522, Jose Nimmy ,   Rice Research Station, Moncompu, Aleppey, Kerala 688 503, Pooja A. P. ,   Department of Agronomy, College of Agriculture, Vellayani, Kerala (India)-695522, Umkhulzum Fathima ,   Department of Agronomy, College of Agriculture, Vellayani, Kerala (India)-695522, Anjana S. ,   Department of Agronomy, College of Agriculture, Vellayani, Kerala (India)-695522
Published: October 2021

Climate change can adversely affect rice production, especially for weed management in the context of emergence and proliferation of newer weed species like weedy rice (Oryza sativa f. spontanea) in the rice growing tracts of Kerala. In the past decade, atmospheric carbon dioxide (CO2) has risen from 371.82 to 407.05 ppm from 2000 to 2018 which might have an impact on the competitive ability of a C3 plant like weedy rice. The competitiveness of weedy rice was studied in an open top chamber (OTC) under a CO2 concentration of 500 ppm (Chamber A), OTC without external CO2 supply (Chamber B), and open condition along with two popular cultivated rice varieties Uma and Jyothi with both air and soil temperature inside the chamber to the tune of 40-430C and 35-400C respectively. The study revealed a higher competitive potential of weedy rice in terms of tillering ability under elevated carbon dioxide as it responded well compared to cultivated rice varieties. There was a differential response of rice varieties to elevated CO2 conditions with medium duration variety responding well compared to short duration one. Compared to ambient conditions (chamber B and open condition), higher tillering was observed under elevated CO2 (chamber A) in which weedy rice tillered profusely (17.33) than cultivated rice species (9 and 11.33). There was a linear increase in plant height of weedy rice in chamber A (108.97cm) during the initial stages and in chamber B (112.77 cm) during reproductive stages. The study evidenced that in the coming future, higher CO2 levels can stimulate biomass production of C3 weed like weedy rice with a greater increase in tillering which could be an important trait affecting inter specific competition.
valor del cuidado del ambiente potenciado desde el vínculo didáctico madre-Tierra en estudiantes de la media colombiana
Authors: Cadavid-Velásquez Edith De Jesús , Flórez-Nisperuza Elvira Patricia , Pérez-Vásquez Nabi Del Socorro
Published: October 2021

El objetivo de esta investigación cualitativa, que se apoya en el paradigma hermenéutico, es analizar desde la perspectiva de estudiantes de la educación media el reconocimiento del “valor del cuidado” que realizan sus madres cotidianamente para sostener la vida en el hogar como fundamento en el diseño de estrategias basadas en procesos de aprendizaje de asimilación y acomodación de Piaget, a fin de potenciar el vínculo didáctico madre-Tierra. Se entrevistaron 45 estudiantes de la Institución Educativa Alfonso Builes Correa, del municipio de Planeta Rica, departamento de Córdoba, y se identificaron sus conocimientos sobre el tema ambiental, el valor del cuidado en sus acciones cotidianas y la asociación con la madre-Tierra. Los resultados muestran que pocos estudiantes asumen una postura sistémica del ambiente e, igualmente, que en sus prácticas diarias no relacionan el cuidado materno como potencialidad para cuidar el ambiente; sin embargo, al someterlos a situaciones problematizadoras fueron capaces de relacionarlo. Se concluye que el análisis de las realidades del contexto desde una reflexión crítica permite armonizar la relación humanidad–naturaleza hacia nuevas formas de habitar para sustentar la vida en y del planeta.
Evaluación de la resistencia de genotipos de Passifloras a Fusarium solani f.sp. passiflorae en granadilla
Authors: Patiño-Pacheco Mónica Jovanna , Pérez-Cardona Olga Yanet
Published: October 2021

En Colombia la enfermedad más limitante en el cultivo de la granadilla es la pudrición del cuello causada por Fusarium solani f. sp. passiflorae. Este patógeno afecta a las plantas en todos los estados de desarrollo en la base de los tallos y causa la muerte en un corto tiempo. El objetivo de esta investigación fue evaluar la resistencia en dieciocho especies de la familia Passifloraceae a la pudrición del cuello. Para este experimento se utilizó un aislamiento altamente virulento según los resultados de las pruebas de patogenicidad con plantas de granadilla. Según los resultados después de la inoculación con el patógeno once especies de Passifloras fueron susceptibles, en contraste cinco genotipos de maracuyás (PE10, PE11, PE13, PE15 y PE17) y dos cholupas (PM02 y PM04), fueron resistentes no manifestaron síntomas. Se recomienda utilizar las especies resistentes para el mejoramiento genético de esta especie o emplearlos como porta injertos.
Respuesta del café a la fertilización con zinc en suelos de la zona cafetera colombiana
Authors: Salamanca-Jimenez Alveiro , Salazar-Gutiérrez Luis Fernando , Sadeghian-Khalajabadi Siavosh
Published: October 2021

Aunque el zinc (Zn) es un microelemento esencial para la nutrición del café por su efecto directo sobre el crecimiento y porque sus deficiencias en las etapas vegetativas son cada vez más comunes, son pocas las investigaciones relacionadas con este nutriente en Colombia. Por ello, con el objetivo de evaluar la respuesta del café variedad Colombia renovado por zoca a la fertilización con zinc (Zn), se realizó una investigación en tres localidades: Venecia, Gigante y Timbío. Los tratamientos consistieron en tres dosis de Zn (5, 10 y 20 kg ha-1), aplicadas al suelo en forma de óxido (ZnO), y tres dosis de Zn (0,045, 0,09 y 0,18 kg ha-1), aplicadas vía foliar como quelato, además de un testigo sin aplicación de Zn. Durante el primer año, la aplicación edáfica se realizó a los dos y ocho meses después del zoqueo, y a partir del segundo año, cada seis meses con la recomendación NPK según el análisis de suelo. La aplicación foliar se realizó a los 60 y 90 días después del pico de floración tanto para la cosecha principal como para la mitaca de cada sitio. Se midió la producción anual de café cereza y acumulada durante cuatro años. Para las condiciones del estudio la fertilización edáfica o foliar de Zn no tuvo efectos significativos en la producción de café cereza pero si se registraron aumentos en los niveles de Zn en el suelo y en las hojas.
Minimization of Transmission Loss in Application of HVDC Networks under Load Increase Scenario
Authors:   Departement of Electrical Engineering, Faculty of Engineering, Hasanuddin University, Gowa 92171, Indonesia, Majid Zulfiana S. , Arief Ardiaty , Akil Yusri S.
Published: October 2021

This study aims to analyze the effect of embedding HVDC (High Voltage Direct Current) on the voltage stability and power losses of the system. Sequential power flow is used to execute the combined AC-DC power flow by adjusting the estimation of DC slack bus injection to speed up convergence and to get more optimal results. Several systematic load increase scenarios are proposed in this study to provide stress loading on the system so that the performance of HVDC can be evaluated. This simulation was implemented on the IEEE 14-Bus System and IEEE 57-Bus System.
Studies on Phase Noise Profiles of Proportional-Integral-Derivative Controlled PLL
Authors:   Department of Electronics & Communication Technology, Gauhati University, Guwahati-781014, Assam, India, Konwar G. , Bezboruah T.
Published: October 2021

Phase noise in a phase-locked loop is originated from reference oscillator, phase detector, loop filter, voltage controlled oscillator and frequency divider which make the system unstable by generating high phase noise at the output spectrum. In this work, a mathematical linear phase noise model is therefore developed to investigate the effect of reference noise, phase detector noise, voltage controlled oscillator noise, frequency divider noise and specifically the loop filter noise. For this purpose, the conventional active or passive low pass filter of the phase locked loop is replaced by a proportional-integral-derivative controller during acquisition. The noise problem of each component is formulated as a transfer function derived from linear analysis of the proposed mathematical noise model. The simulation results show that the effect of noise attenuation of voltage controlled oscillator is -40dB/decade while the noise attenuation of the reference noise, phase detector noise, proportional integral derivative controller noise and frequency divider noise are approximately -20dB/decade each. The 6.21GHz proposed proportional-integral-derivative controlled phase-locked loop is also highly stable with fast switching speed of 0.238nS at damping factor of 0.625 and phase margin of 92° for minimum phase noise.
Bologna Declaration and Mathematical Education in the Countries of the Former USSR (by the Example of Russia and Latvia)
Authors:   Academic Department of Higher Mathematics, Plekhanov Russian University of Economics, Moscow, Russia, Maksimenko Marianna N. , Volodko Inta , Cernajeva Sarmite , Eglite Irina
Published: October 2021

More than twenty years have passed since the adoption of the Bologna agreements, and disputes between their supporters and opponents do not cease. In general, in Europe until recently two education systems dominated: Anglo-Saxon, i.e. German, and Latin. As a result of the adoption of the Bologna agreements, it turned out that the Latin system won. As math teachers of Higher School, we are interested in changes regarding the teaching of mathematics in Higher education. In this article the changes that had occurred as a result of the signing of the Bologna Convention were analyzed using the examples of Latvia and Russia.
Student Perceptions of the Institutional Response to an Untimely COVID-Driven Semester Disruption
Authors:   University of Rhode Island, Kingston, RI 02881, USA, Dewsbury Bryan M. , Mermin Zoe
Published: October 2021

COVID19 caused institutions of higher education in the United States to rapidly shift from mostly Face-to-Face (F2F) to remote learning in the middle of Spring 2020. We deployed a survey to 91 students from six unique campuses inquiring about their perception of how the university handled the transition both in terms of the logistics and care for their person. The survey also asked about students’ concerns both during the transition process and for the future semesters. Our respondents indicated general disappointment with the ways in which the transition process was handled, and identified academic concerns and the severance of relationships as the key things they were concerned about for future semesters. Students’ responses suggest that social connection and sense of belonging are critical predictors that determine the degree to which they engage their respective institutions. Though our survey questions were focused on concerns related to the pandemic, the responses still serve as a timely reminder for institutions to greater consider the ways in which they may need to focus on the non-cognitive aspects of the higher education experience.
Qualitative Analysis of the Use of Mind Mapping in Physician Assistant Students
Authors:   School of Graduate Studies (Biomedical Sciences), Rutgers University, Piscataway, NJ, USA, Israel Cynthia , Zipp Genevieve Pinto , D’ Abundo Michelle Lee , Deluca Deborah
Published: October 2021

Critical Thinking (CT) is essential for the Physician Assistant (PA) as they seek to provide patient-centered treatment. Mind Mapping (MM) is an innovative learning strategy used to enhance critical thinking skills. This paper describes the effectiveness of mind mapping as a learning strategy and the different aspects of promoting critical thinking in PA students. PA students who made mind maps for nine weeks indicated that mind mapping assisted in memory, analysis, understanding, organization, and integration of information. All of which are essential for CT.PA students emphasized the vital role faculty play in promoting CT by employing active and innovative learning strategies to facilitate learning and reinforce ideas. PA students reported that active learning strategies contribute to the development of CT skills, and they are interested in learning new strategies primarily to improve learning, performance, and retention of knowledge. Together these findings suggest that PA educators can optimize Learning that fosters CT using strategies like mind mapping.