bluuebunny/crossref_metadata_2025 huggingface dataset:
ÉTICA, PESQUISA E MODISMOS NOS PROJETOS DE TCC’S DO CURSO DE PEDAGOGIA
Authors: Nascimento Mariana Costa do , Oliveira Terezinha
Published: August 2021

O presente artigo tem como objetivo investigar os temas produzidos pelos alunos nos projetos de TCC’s do curso de Pedagogia, na modalidade Educação a Distância. A pesquisa é qualitativa, de caráter documental. Os resultados da análise indicam que os alunos optam por temas recorrentes da literatura acadêmica (lúdico). Constatamos também a insuficiência ou ausência do referencial teórico nos projetos. A metodologia utilizada pelos alunos foram, predominantemente, as de natureza bibliográfica e documental. Sobre as fontes, constatou-se dificuldades para delimitação dos sítios de busca. Os alunos, durante a escrita do projeto, recorreram a sites não-científicos, como blogs, portais e/ou a reportagens. A análise da escrita dos trabalhos, evidenciou as dificuldades dos alunos em relação a redação de textos. Conclui-se a importância do professor orientador, desde a elaboração dos projetos de pesquisa, uma vez que cabe aos docentes instrumentalizar os alunos para a construção de referenciais teóricos e metodológicos coesos e consistentes.
CULTURA MATERIAL DA MANDIQUERA E A PROPOSIÇÃO DO CURRÍCULO CULTURAL NO CONTEXTO ESCOLAR DA AMAZÔNIA BRAGANTINA
Authors: Maciel Rogerio Andrade , Magalhães Franciele de Almeida
Published: August 2021

Este artigo analisa a Cultura Material da Mandiquera e a proposição do Currículo Cultural para o contexto escolar das escolas do campo na Amazônia Bragantina, Estado do Pará. Metodologicamente, utilizou a abordagem da Nova História Cultural na observação dos artefatos culturais dos agricultores campesinos para a produção da Mandiquera, dentre suas significações e sentidos que possibilitaram a tessitura do currículo escolar pela teia do conhecimento e suas respectivas áreas. O uso de imagens, as entrevistas, a utilização de máscaras e álcool em gel e as mensagens via WhatsApp permitiram a coleta de dados. A análise dos dados ocorreu pela organização sistemática da teia do conhecimento proposta por Freire (1987), a produção e a apropriação dos sujeitos sobre esses artefatos baseados nos estudos de Certeau (2014) e Chartier (1991). Todavia, foi verificado que a Cultura Material da Mandiquera, enquanto tema gerador, está constituída por quatro eixos temáticos atrelados aos seguintes artefatos culturais: “(Mandiocaba); (O uso de caititu), (ralador), (Motor Elétrico), (Colher de pau), (Panelão de Alumínio); (Pano e Peneira); (Escova felpuda, vasilhames plásticos e de alumínio)”. Além disso, foram identificados que a associação desses eixos geram sentidos sobre as “Práticas Agroecológicas e Alimentação Camponesa”. Por fim, a cultura material da Mandiquera é orientadora de matrizes organizadoras, currículos culturais, onde o diálogo dos educadores das escolas do campo com as práticas produtivas dos agricultores camponeses são fundamentais para legitimar/ registrar/ visibilizar os artefatos enquanto uma estratégia de política pública educacional, legitimando-os, enquanto patrimônios históricos da Amazônia Bragantina, do Brasil e do Mundo.
JUSTIÇA CURRICULAR NO PLANO NACIONAL DE EDUCAÇÃO (2014-2024)
Authors: Rodrigues Michele , Araújo Wesley Batista
Published: August 2021

Este artigo busca estabelecer um diálogo entre o conceito de justiça curricular (JC), (TORRES SANTOMÉ, 2013; PONCE, 2018) e as estratégias previstas para a Educação Básica no Plano Nacional de Educação – (PNE) (2014-2024). A justiça curricular, um conceito e uma prática em construção, tem como fim lançar mão do currículo escolar como um meio para superação das desigualdades.  O texto defende o PNE (2014-2024) como o resultado da luta de educadoras e de educadores organizadas/os no campo progressista. O Plano estabelece, por meio de metas e de estratégias, um modelo de ação para o Estado brasileiro no cumprimento do direito à educação. Ao estabelecer os preceitos legais para uma educação de qualidade de referência social, o PNE fortalece os elementos que compõem um currículo escolar comprometido com a busca da justiça social aproximando-o do conhecimento, do cuidado e da convivência democrática, estabelecidas por Ponce (2018) como as dimensões da justiça curricular. Finda-se afirmando que as possibilidades convergentes estabelecidas entre as estratégias do PNE e as dimensões da JC apontam sinais contra-hegemônicos na proposição de políticas educacionais e currículos escolares.
Discursos sobre assédio sexual de rua e seu diálogo com o contrato semiótico de responsabilização da vítima
Authors: Tulio Baggio Adriana
Published: August 2021

O assédio sexual de rua é um tipo de violência contra a mulher cujo enfrentamento é dificultado, entre outros fatores, pela falta de dados. Essa carência foi pouco minorada pela promulgação da lei de importunação sexual em 2018. Antes da lei, uma das iniciativas que se propuseram a dar visibilidade aos casos de assédio no Brasil foi o mapa Chega de Fiu-Fiu, operante de 2014 a 2019. Vítimas ou testemunhas de assédio podiam registrar uma ocorrência, indicar a sua localização e descrever o acontecido. Nota-se que alguns depoimentos são mais densamente figurativizados (GREIMAS, 2004) no que se refere à caracterizações do próprio sujeito do assédio, especialmente quanto à roupa. Tais informações seriam "desnecessárias" no contexto dos relatos, o que implica (GRICE, 1975) a suposição de uma estratégia discursiva de prevenção à culpabilização da vítima. Para verificar essa hipótese, a análise apresentada neste artigo concentra-se em depoimentos sobre assédios ocorridos em Curitiba; dos 145 registros feitos entre 2014 e 2018, 21 apresentam a densidade figurativa de vestuário que manifesta a estratégia de "defesa". A relação desses depoimentos com o contrato semiótico de culpabilização da vítima pode ser de aceitação, de recusa, de despistamento (não recusa) ou de questionamento (não aceitação). Propõe-se, no entanto, que uma atitude — discursiva, é importante frisar — de enfrentamento à lógica de culpabilização da vítima talvez se deva pautar pela ignorância de tal contrato e na consequente invalidação de sua lógica. Na imprensa, por exemplo, essa postura se manifestaria pela não divulgação da roupa usada pelas vítimas no momento em que sofreram violência.
CONTRIBUTOS DA SEMIÓTICA PARA UMA FILOSOFIA DA ARQUITETURA
Authors: Canova César
Published: August 2021

Este estudo propõe contributos para uma filosofia da Arquitetura que a caracterize pela comunicação não-verbal e a aproxime das artes. Entende-se que a essência da Arquitetura passa pela abordagem do processo de projeto. No processo de projeto, estão intrínsecos os processos de comunicação e significação. Esses processos podem ser abordados em âmbito filosófico a partir de uma Fenomenologia coerente, como propõe Charles S. Peirce. Propõe-se uma associação entre a classificação dos dez tipos de signos semióticos originados logicamente a partir das tríades propostas por Peirce e dez partes do processo de projeto em Arquitetura. A proposta deste artigo traz luz ao entendimento de uma Semiótica da Arquitetura, contribuindo assim para uma abordagem pragmática de sua filosofia. Essa abordagem serviu de base à tese de doutorado desenvolvida pelo autor e poderá igualmente servir a estudos futuros.

Palavras-chave: Semiótica, Peirce, Projeto arquitetônico, Arquitetura, Classificação dos Signos, Fenomenologia.
HISTÓRIAS DE VIDA E FORMAÇÃO DE ALUNOS LGBTQ +
Authors: Martins de Castro Nilsandra
Published: August 2021

O propósito do presente estudo foi o de refletir sobre as narrativas de acadêmicos LGBTQ+  da UFT com relação a suas histórias de in/exclusão ao longo de seu processo de escolarização. Partimos do pressuposto de que entender suas histórias de vida e de formação nos ajudará a dar mais visibilidade e compreensão acerca do trato/respeito/aceitação a propósito das hostilidades sofridas em suas trajetórias de vida. Para tanto os dados foram gerados a partir de entrevistas semiestruturadas realizadas no primeiro semestre de 2015. A pesquisa ora delineada é de abordagem qualitativa, de natureza interdisciplinar e de método investigativo de história oral, sendo a semiótica uma de suas vertentes, a sociossemiótica, empregadas como subsidio teórico para a análise dos relatos. Nessa perspectiva, interessou-nos os sentidos que os sujeitos atribuem a sua experiência, levando-se em conta como o fazem ao narrar o vivido. Com esse trabalho, pudemos perceber que o apelo a educação deve ser uma máxima prioritária, é dela que advém a esperança de dias mais progressistas em dimensões mais libertadora da consciência humana.
PRÁTICAS E CAMPOS DE ATUAÇÃO
Authors: Duarte Renata
Published: August 2021

O presente artigo tem como referencial teórico e metodológico a Semiótica francesa e pretende mobilizar conceitos que compõem tanto o arcabouço da Semiótica discursiva quanto o modelo dos níveis de pertinência da análise semiótica proposto por Jacques Fontanille. A partir disso, objetiva-se estabelecer a intersecção entre a noção de prática semiótica com a própria prática educacional, tal qual processada junto aos documentos oficiais que normatizam o currículo comum nacional brasileiro na educação básica. A hipótese que direciona o trabalho é a de que é possível mobilizar o conhecimento semiótico citado para compreender as categorias organizadoras da Base Nacional Comum Curricular (BNCC) denominadas “campos de atuação”, na medida em que elas se referem às diferentes esferas das atividades humanas, esferas que implicam as práticas correspondentes a cada uma delas. Essa compreensão considera que, para se cumprir o compromisso da escola com a formação integral do aluno, é preciso que o processo de ensino-aprendizagem proporcione aos estudantes experiências que contribuam para a ampliação de seus letramentos, de forma a possibilitar a participação significativa e crítica dos discentes nas diversas práticas sociais. Logo, pretende-se com esta pesquisa discutir as contribuições que a teoria tem a oferecer à prática educacional, ao oferecer recursos para um trabalho eficiente com as categorias citadas, garantindo, assim, o desenvolvimento de competências e habilidades que se espera que todos os estudantes desenvolvam ao longo da escolaridade básica.
Teaching during a Pandemic: Elementary Candidates’ Experiences with Engagement in Distance Education
Authors: Smith Monica Gonzalez , Schlaack Nicole
Published: August 2021

The following research reports on a collaborative effort between two university field supervisors for an elementary teacher preparation program in the Pacific southwest. Utilizing practitioner inquiry and situated learning as conceptual frameworks, the authors qualitatively examine the experiences ten elementary education teacher candidates have with promoting student engagement during emergency response teaching because of the COVID-19 pandemic. An interpretive phenomenological analysis of 20 lesson reflections and supervisor observation notes reveals teacher candidates (TCs) need more support with questioning, feedback and formative assessment, and technology tools to keep students engaged when teaching at a distance. Recommendations suggest a need for teacher preparation programs to provide TCs with opportunities to practice engagement strategies in distance education settings.
Artificial Intelligence for Career Guidance – Current Requirements and Prospects for the Future
Authors: Westman Stina , Kauttonen Janne , Klemetti Aarne , Korhonen Niilo , Manninen Milja , Mononen Asko , Niittymäki Salla , Paananen Henry
Published: August 2021

Career guidance in the era of life-long learning faces challenges related to building accessible services that bridge education and employment services. So far, only limited research has been conducted on using artificial intelligence to support guidance across higher education and working life. This paper reports on development on using artificial intelligence to support and further career guidance in higher education institutions. Results from focus groups, scenario work and practical trials are presented, mapping requirements and possibilities for using artificial intelligence in career guidance from the viewpoints of students, guidance staff and institutions. The findings indicate potential value and functions as well as drivers and barriers for adopting artificial intelligence in career guidance to support higher education and life-long learning. The authors conceptualize different modes of agency and maturity levels for the involvement of artificial intelligence in guidance processes based on the results. Recommended future research topics in the area of artificially enhanced guidance services include agency in guidance interaction, developing guidance data ecosystem and ethical issues.
Machine Translation in the Language Classroom: Turkish EFL Learners’ and Instructors’ Perceptions and Use
Authors: Ata Murat , Debreli Emre
Published: August 2021

Online machine translation (OMT) tools are not exclusively designed for language learners; however, these tools are popular among them. This quantitative study investigated the perceptions and attitudes of Turkish speaking EFL learners and instructors in a university English program regarding the use of OMT tools. Two online questionnaires were administered to 462 Turkish-speaking learners and 34 instructors. The results revealed that 94% of the learner participants reported using OMT tools for their language learning studies. The learners predominantly used these tools for single-word or phrase translations. Reading and writing assignments were the main areas where the learners most frequently referenced to OMT tools. The learner participants thought the accuracy of the tools was not high, and the ethicality of using them depended on how they were used. Three-quarters of the instructor participants reported using OMT tools, and their judgements concerning the accuracy of these tools were more positive than the learners’. The results also revealed a mismatch between learners’ and instructors’ perceptions and attitudes regarding OMT tools in foreign language learning. Accordingly, the instructors often overestimated how much learners use OMT tools, while learners underestimated the instructors’ interest in them. These findings suggest policies should be developed within language learning institutions to guide students’ use of OMT tools, as well as improve the mutual understanding between students and teachers in terms of their ethicality.
Spatiotemporal variability of abundance size-spectra in streams across North America
Authors: Pomeranz Justin , Junker James R. , Wesner Jeff
Published: August 2021

Accepted version of this manuscript can be found
here: https://doi.org/10.1111/gcb.15862

The distribution of abundance and biomass within ecological communities
is related to trophic transfer efficiency from prey to predators. While
it is considered to be one of the few consistent patterns in ecology,
spatiotemporal variation of this relationship across continental-scale
environmental gradients is unknown. Using a database of stream
communities collected across North America (18-68° N latitude, -4 to
25°C mean annual temperature) over 3 years, we constructed 162
mass-abundance relationships (i.e. size spectra). Size-spectra slopes
declined (became steeper) with increasing temperature. However, the
magnitude of change was relatively small, with median slopes changing
from -1.2 to -1.3 across a 29°C range in mean annual temperature. In
contrast, total community biomass increased 3-fold over the temperature
gradient. Our study suggests strong conservation of abundance
size-spectra in streams across broad natural environmental gradients.
This supports the emerging use of size-spectra deviations as indicators
of ecosystem health.
Investment as the Opportunity Cost of Dividend Signaling
Authors: Kaplan Zachary , Pérez-Cavazos Gerardo
Published: August 2021

We provide evidence that dividends signal sustainable earnings generated by assets-in-place for firms with weak investment opportunities. In the cross-section, both dividend levels and changes contain more earnings information among firms with weaker investment opportunities. Intertemporally, when aggregate investment opportunities in the economy are worse, dividend changes convey more earnings information. In contrast, dividends have a more negative association with investment spending for firms with strong growth options, as funding investment is a higher priority for those firms. Collectively, our findings suggest that dividends serve as a counter-signal, whereby additional information about investment opportunities give rise to signaling that is non-monotonic in firm quality.

JEL Classifications: G15; G32; G35.
Growth Matters: Disclosure and Risk Premium
Authors: Ellahie Atif , Hayes Rachel M. , Plumlee Marlene A.
Published: August 2021

Theoretical work generally predicts a negative association between disclosure and risk premium, where additional disclosure reduces estimation risk or information asymmetry. However, empirical studies frequently report mixed results. Recent theoretical studies suggest that the association between disclosure and risk premium is not necessarily always negative, and could be positive (or less negative). For example, Dutta and Nezlobin (2017) show that disclosure can be associated with higher risk premium when conditioned on a firm's growth rates. Similarly, Johnstone (2016) shows that higher signal quality can lead to higher risk premium. Motivated by these studies, we re-examine the association between disclosure and risk premium, conditional on growth. Using various proxies for risk premium, disclosure, and growth, we provide robust evidence that while the unconditional association between disclosure and risk premium is ambiguous, the conditional association is negative for lower growth firms but is less negative (or positive) for higher growth firms.

Data Availability: Additional analyses are available from the authors upon request.

JEL Classifications: M41; G12.
80 “Minutes away, worlds apart”: The changing imagination of the Boston Harbor Islands
Authors: Šimková Pavla
Published: August 2021

The Boston Harbor Islands are a historically urban archipelago. Since its founding in 1630, the city of Boston has embedded them firmly in its urban infrastructure. The islands have served as sources of wood and building stone, common pastures, sites of harbor defenses and lighthouses, and as ‘dumping grounds’ for materials, businesses, and institutions undesirable in the city proper. In the middle third of the twentieth century, however, Bostonians imagined their city’s harbor islands in a new way: one that has obscured most of their long human history and has cast them in the role of a natural landscape fundamentally different from the city. This changing perception resulted in the islands recently becoming places reserved almost exclusively for conservation and recreation. This article explores the way in which a certain kind of island narrative that frames islands as isolated, extraordinary places of mystery and adventure came to dominate the imagination of Boston’s previously mundane urban islands.
The Distribution Mechanism of Subsidized Liquid Petroleum Gas in Sajad District West Kalimantan: An Investigation Based on Islamic Law
Authors: Arifin Zarul
Published: August 2021

This research is based on an initial survey of the distribution of subsidized 3-kg LPG which I think is not right on target because it is full of fraudulent practices. In distributing LPG, it was found that many rich people still buy subsidized 3-kg LPG. In fact, according to government regulations, 3-kg LPG is intended for the poor economic community or small business owners. The problem that is the focus of this research is how the mechanism for distributing 3-kg LPG is in Sajad Regency, and how is the law on selling 3-kg LPG for the rich when viewed according to Islamic law. To answer these questions, data collection techniques were carried out through observation and interviews. The results of this study are 1) the distribution of 3-kg LPG is not in accordance with government regulations, namely the distribution of LPG prioritizes people who can afford it above the official price, while the poor can only get a small part of the official government price/national subsidy price, so there are more stock for sale at more expensive than the official price. 2) If viewed from Islamic law, the distribution of 3-kg LPG is not in accordance with the sharia business method because it is carried out by ignoring government regulations, namely traders are considered to have broken an agreement with the government regarding price determination. In addition, this buying and selling practice also lacks supervision, no sanctions and no law enforcement to maintain subsidy prices so that many sellers dare to violate contracts with the government and violate government regulations.
Stereotip Gender dan Wacana Maskulinitas dalam Novel Di Tanah Lada Karya Ziggy Zezsyazeoviennazabrizkie
Authors: Intan Tania
Published: August 2021

This study aims to uncover gender stereotypes and discourses of masculinity that are scattered in the novel Di Tanah Lada by Ziggy Zezsyazeoviennazabriskie. The method used is descriptive-qualitative with a gender study approach. Data in the form of words, phrases, and sentences were collected by using literature study techniques and taking notes. The theoretical basis used comes from Connell, Feasey, Kimmel, and Flood. The results show that the novel is narrated from the girl character, Salva, who is innocent and honest. Despite these relative deviations, the novel Di Tanah Lada adopts traditional gender stereotypes. Almost all male characters are depicted as superior, dominant, and become perpetrators of violence, so that they are associated with evil male characters. On the other hand, female characters are shown as inferior, weak, and dependent. The masculinity discourse that is built supports traditional gender stereotypes which are still considered acceptable in the contemporary context.
Women In Moderating Corporate Social Responsibility
Authors: Devy Happy Sista , Hukmi Arsyad
Published: August 2021

Making of decision and process in operational companies could not be separated or closely related by shareholders such as the Board of Commissioners and Directors. The Existence of Women Directors Towards Color of nuance in Companies, Several studies determined the existance of Women Directors in Companies tend to change the dynamics in the Companies. The purpose of this study was to discover the effect of corporate social responsibility (CSR) on corporate value and to determine the relationship between female directors in moderating between CSR reporting on company value on Islamic shares in Indonesia. The results showed that coporate social responsibility (CSR) had a positive and significant effect on the price earnings ratio (PER) and return on equity (ROE), and the Women Directors could not moderate the influence of CSR on company value.
The Role of Parents in Optimizing Gadgets for Childrens Learning During the COVID-19 Pandemic
Authors: Azizah Intan Nur
Published: August 2021

The purpose of this research is to respect the legal protection of ethnic Uighur women in Xinjiang, China from the perspective of International Human Rights and to find out and study the resolution of cases of serious international human rights violations against ethnic Uighur women in Xinjiang, China. Legal protection for women of Uighur ethnicity is based on articles 3,4,5,9,10,11, the Universal Declaration of Human Rights, namely by providing protection in the form of protection of the right to life, the rights to freedom, and the right to personal security, and others that are regulated in international legal instruments. 2) Serious human rights violations committed by the government of Xinjiang, China are not justified by international law because they violate the provisions stipulated in the subsequent Universal Declaration of Human Rights for the incidents of human rights violations, so the settlement of disputes between the two parties is carried out by negotiation or mediation. If this method is not effective, the UN Security Council can submit the case to an international court such as the International Criminal Court as regulated in article 1 of the 1998 Rome Statute.
Aktivitas Antibakteri Ekstrak Etanol Buah Hanggasa (Amomum dealbatum Roxb.) Terhadap Escherichia coli dan Bacillus cereus
Authors: Kusuma Arif S.W. , Nurmalinda Sarah , Ramadhania Zelika M. , Indradi Raden B.
Published: August 2021

Masyarakat daerah Pangandaran, Jawa Barat secara turun-temurun memanfaatkan buah hanggasa (Amomum dealbatum Roxb.) sebagai obat diare, yang umumnya diketahui disebabkan oleh infeksi bakteri Escherichia coli dan Bacillus cereus. Penelitian ini bertujuan untuk mengetahui aktivitas antibakteri, menentukan rentang nilai Konsentrasi Hambat Tumbuh Minimum (KHTM) dan Konsentrasi Bunuh Minimun (KBM) serta nilai banding aktivitas antibakteri ekstrak etanol buah hanggasa dengan antibiotik kloramfenikol terhadap E. coli ATCC 11229 dan B. cereus ATCC 11778. Penelitian ini dilakukan melalui tahap determinasi tumbuhan dan penyiapan simplisia, ekstraksi simplisia, penapisan fitokimia, pengujian aktivitas antibakteri ekstrak menggunakan metode difusi agar teknik cakram kertas, penentuan rentang KHTM dan KBM ekstrak dengan metode mikrodilusi dan penentuan nilai banding aktivitas antibakteri ekstrak dengan antibiotik kloramfenikol. Hasil penelitian menunjukkan bahwa ekstrak etanol buah hanggasa (A. dealbatum Roxb.) memberikan zona hambat pada B. cereus namun tidak pada E. coli di semua konsentrasi. Hasil penentuan nilai rentang KHTM ekstrak etanol buah hanggasa untuk B. cereus ATCC 11778 sebesar 1,25%-2,5% (b/v) dan nilai KBM sebesar 2,5% (b/v). Dapat disimpulkan bahwa ekstrak etanol buah hanggasa memberikan aktivitas antibakteri pada B. cereus namun tidak pada E. coli.
Photocatalytic oxidation of psychoactive drug Duloxetine: Degradation kinetics, inorganic ions and phytotoxicity evaluation
Authors: Tsoumachidou Sophia , Valari Maria , Poulios Ioannis
Published: August 2021

Pharmaceutically active compounds, emerging extensively in ecosystems as pollutants, have become an important environmental and public health issue, since they can contaminate drinking water and pose threat to wildlife and human health. Therefore, efforts should be made in order to establish proper methods for their inactivation or elimination in the environment. The photocatalytic oxidation of psychoactive drug Duloxetine (DLX) has been investigated. In the case of heterogeneous photocatalytic oxidation, the effect of TiO2 P25 concentration (0.1–1 g L-1), initial concentration of H2O2 (0.25–0.2 g L-1) and Fe3+ (0.00175–0.014 g L-1) and pH of the solution (3–10) on initial reaction rates were evaluated, while for homogeneous photocatalytic oxidation the effect of the amount of H2O2 (0.25–0.2 g L-1) and Fe3+ (0.00175–0.014 g L-1) were investigated. Additionally, the conversion of the heteroatoms in the molecule of DLX to inorganic ions (NO3-, NH4+, SO42-) during photocatalytic process has been observed, and phytotoxicity testing, using three plant species, was carried out in order to examine the effect of photocatalytic oxidation on the toxicity of DLX. According to the results presented in this study, both heterogeneous and homogeneous photocatalytic oxidation is an efficient methodology for DLX degradation.
Efficiency of single and mixed dimeric surfactants micelles on solubil-ization of polycyclic aromatic hydrocarbons
Authors: Kumar Naveen , Tyagi Rashmi , Tyagi V.K.
Published: August 2021

The solubilization of polycyclic aromatic hydrocarbons (PAHs) such as naphthalene, phenanthrene and pyrene by single and mixed anionic dimeric surfactants was investigated and correlated with micellar properties of these surfactants. The surface and micellar properties of single and binary mixed combinations of anionic dimeric surfactants have been studied through surface tension as well as conductivity measurements at 300 K. The associations between their micelle properties and solubilizing efficiency towards PAHs have been quantified and discussed in terms of the molar solubilization ratio (MSR), micelle-water partition coefficient (Km) and standard free energy of solubilization (ΔG0S).The negative value of ΔG0Sexhibits spontaneously the solubilization process. The MSR values increase with the order “pyrene < phenanthrene < naphthalene”. The current study provides significant information for the selection of mixed dimeric surfactants for solubilizing water-insoluble compounds.
Simulation study of pressure swing adsorption to purify helium using zeolite 13X
Authors: Javadi Shokroo Ehsan , Farniaei Mehdi , Baghbani Mehdi
Published: August 2021

A two-bed pressure swing adsorption system on a commercial type of zeolite 13X adsorbent has been studied numerically over a wide range of operating conditions to helium separation from gaseous mixture. The model includes energy, mass and momentum balances. The coupled partial differential equations are solved using fully implicit forth order Rung-Kutta scheme in the simulation. The effects of adsorption step pressure, adsorption step time and feed flow rate on the helium purity and recovery were investigated. Results shown that as the adsorption step pressure increases the helium purity will be increased. In addition, the helium recovery increases, and the helium purity decreases when the feed flow rate increases. Finally, the simulation results indicated a very good agreement with some current literature experimental work.
Use of sodium tetraphenyl boron for fabrication of potentiometric membrane sensor for the assay of olanzapine in pharmaceuticals and human urine
Authors: Nagaraju Rajendra Prasad
Published: August 2021

Olanzapine (OLP), chemically known as 2-Methyl-10-(4-methyl-piperazin-1-yl)-4H-3-thia-4, 9-diaza-benzo[f]azulene, is an atypical antipsychotic drug. It is used for the treatment of schizophrenia and bipolar disorder. A new simple and selective membrane based potentiometric sensor was developed for potentiometric determination of olanzapine. The membrane was constructed using an ion-pair of OLP and sodium tetraphenyl boron in dioctyl phthalate and PVC. The membrane provides good linear Nernstian response covering relatively wide concentration range of 4 × 10-6 - 1 × 10-2 M OLP over pH range of 2.6 - 7.8. The detection limit for the developed sensor was founded as 2.02 × 10-6 M. The response time of developed sensor is <10 s for the range of determination. The sensor showed good selectivity for OLP in the presence of various cations, anions and other organic molecules. The membrane was successfully applied in direct potentiometric determination of OLP in tablets. The percentage recovery of OLP, ranged from 96.2 to 99.68% with a mean standard deviation <5%, indicates the adoptability of sensor for the direct estimation of OLP in pharmaceuticals. The developed sensor was used to determine OLP in spiked human urine sample and the satisfactory results were obtained.
A port-stream based equation oriented modelling of complex distillation column: A dividing wall column case study
Authors: Idris R. , Harun N. , Othman Mohamad Rizza
Published: August 2021

Dividing wall column (DWC) offers higher degree of freedom in comparison with the conventional column. Furthermore, the different sections configurations within the column are highly interacting with several recycle loops. Facing with such complex unit operation, describing its behaviour encourages the focal point on the resolution of ideal modelling approaches. Equation oriented (EO) modelling of DWC has been studied by several researchers involving complex algorithm and methodology. In this work, a new approach for modelling of DWC is presented. The modelling methodology involves variables connectivity based on ports and streams that is admissible to equation-oriented flow sheet. To verify the functionality of the proposed method, the modelled DWC is validated with two case studies depicted from experimental literature data to separate alcohol mixture and fatty acid fractionation. The model development was performed in MOSAIC, a web-based modelling tool and run in gPROMS. The model shows good convergence and has less than 10% error when compared to the above mentioned case studies. To furthermore extend the model capability, relative gain array (RGA) analysis was conducted for the fatty acid fractionation to determine the best control configuration in DWC. Result shows that L-S-V and L-S-B configurations are the best control configurations. Our analysis also shows that reflux flowrate, side flowrate and vapor boilup are best to control distillate product, side product and bottom product, respectively.
Optimization of oscillated gas-liquid separator for simultaneous heavy metals determination in water sample
Authors: Abdul-Majeed Wameath S.
Published: August 2021

A technique has been developed to detect and determine multi heavy metals simultaneously in a water sample. Hydride generating technique was implemented to convert the analyte which present in the water sample (liquid phase) into another form with an improved separation coefficient, called “derivative”. This process occurred without changing the original chemical structure. Derivatives were separated from the liquid phase by applying custom made gas-liquid separator (GLS), operated with oscillation. Separated species then transferred into a die-electric barrier discharge (DBD) plasma atomizer where a fragmentation of the analyte into free atoms is occurred. The generated atoms were detected by emission spectroscopy. The presented technique was applied for detection of individual and multi heavy metals simultaneously in water sample and proved useful in terms of reducing the effect of the hydrogen generated, through the process, on suppressing the atoms signal in the DBD atomizer.
Study on the physical properties of Cu2ZnSnS4 thin films deposited by pneumatic spray pyrolysis technique
Authors: Courel Maykel , Nicolás Miriam M. , Vigil-Galán Osvaldo
Published: August 2021

The acquisition of new materials for the manufacturing of high efficiency and low-cost photovoltaic devices has currently become a challenge. Thin films of CuInGaSe and CdTe have been widely used in solar cell of second generation, achieving efficiencies about 20 %; however, the low abundance of In and Te as well as the toxicity of Cd is the primary obstacles to their industrial production. Compounds such as Cu2ZnSnS4, Cu2ZnSnSe4 and Cu2ZnSn(SSe)4 have emerged as an important and less costly alternative for efficient energy conversion in the future. In addition, these compounds have the required characteristics to be used as an absorber material in solar cells (band-gap close to 1.4 eV, an absorption coefficient greater than 104 cm-1 and a p-type conductivity). In this work, we present a study of the structural, compositional, morphological and optical properties of Cu2ZnSnS4 thin films deposited by spray pyrolysis technique as well as their dependence on temperature.
Topological properties for a perturbed first order sweeping process
Authors: Affane Doria , Boulkemh Loubna
Published: August 2021

In this paper, we consider a perturbed sweeping process for a class of subsmooth moving sets. The perturbation is general and takes the form of a sum of a single-valued mapping and a set-valued mapping. In the first result, we study some topological proprieties of the attainable set, the set-valued mapping considered here is upper semi-continuous with convex values. In the second result, we treat the autonomous problem under assumptions that do not require the convexity of the values and that weaken the assumption on the upper semi-continuity. Then, we deduce a solution of the time optimality problem.
On a new one-parameter generalization of dual-complex Jacobsthal numbers
Authors: Bród Dorota , Szynal-Liana Anetta , Włoch Iwona
Published: August 2021

In this paper we define dual-complex numbers with generalized Jacobsthal coefficients. We introduce one-parameter generalization of dual-complex Jacobsthal numbers - dual-complex r-Jacobsthal numbers. We investigate some algebraic properties of introduced numbers, among others Binet type formula, Catalan, Cassini, d’Ocagne and Honsberger type identities. Moreover, we present the generating function, summation formula and matrix generator for these numbers. The results are generalization of the properties for the dual-complex Jacobsthal numbers.
Generalizations of graded second submodules
Authors: Ghiasvand Peyman , Farzalipour Farkhonde
Published: August 2021

Let G be a group with identity e. Let R be a graded ring, I a graded ideal of R and M be a G-graded R-module. Let ψ: Sgr(M) → S gr(M) ∪ {∅} be a function, where Sgr(M) denote the set of all graded submodules of M. In this article, we introduce and study the concepts of graded ψ -second submodules and graded I-second submodules of a graded R-module which are generalizations of graded second submodules of M and investigate some properties of this class of graded modules.
Induced star-triangle factors of graphs
Authors: Kainth S. P. S. , Kumar R. , Pirzada S.
Published: August 2021

An induced star-triangle factor of a graph G is a spanning subgraph F of G such that each component of F is an induced subgraph on the vertex set of that component and each component of F is a star (here star means either K1,n, n ≥ 2 or K2) or a triangle (cycle of length 3) in G. In this paper, we establish that every graph without isolated vertices admits an induced star-triangle factor in which any two leaves from different stars K1,n (n ≥ 2) are non-adjacent.
Generalized normal ruled surface of a curve in the Euclidean 3-space
Authors: Kaya Onur , Önder Mehmet
Published: August 2021

In this study, we define the generalized normal ruled surface of a curve in the Euclidean 3-space E3. We study the geometry of such surfaces by calculating the Gaussian and mean curvatures to determine when the surface is flat or minimal (equivalently, helicoid). We examine the conditions for the curves lying on this surface to be asymptotic curves, geodesics or lines of curvature. Finally, we obtain the Frenet vectors of generalized normal ruled surface and get some relations with helices and slant ruled surfaces and we give some examples for the obtained results.
Certain classes of bi-univalent functions associated with the Horadam polynomials
Authors: Orhan Halit , Mamatha Paduvalapattana Kempegowda , Swamy Sondekola Rudra , Magesh Nanjundan , Yamini Jagadeesan
Published: August 2021

In this paper we consider two subclasses of bi-univalent functions defined by the Horadam polynomials. Further, we obtain coefficient estimates for the defined classes.
Key profibrotic and pro-inflammatory pathways in the pathogenesis of diabetic kidney disease
Authors: Patel Devang M. , Yang Yuxin , Shi Kexin , Wu Tieqiao , Cooper Mark E. , Chai Zhonglin
Published: August 2021

Diabetes is a noncommunicable disease and arguably represents the greatest pandemic in human history. Diabetic kidney disease (DKD) is seen in both type 1 and type 2 diabetes and can be detected in up to 30–50% of diabetic subjects. DKD is a progressive chronic kidney disease (CKD) and is a leading cause of mortality and morbidity in patients with diabetes. Renal fibrosis and inflammation are the major pathological features of DKD. There are a large number of independent and overlapping profibrotic and pro-inflammatory pathways involved in the pathogenesis and progression of DKD. Among these pathways, the transforming growth factor-β (TGF-β) pathway plays a key pathological role by promoting fibrosis. Sirtuin-1 (SIRT1) is a protein deacetylase that has been shown to be renoprotective with an anti-inflammatory effect. It is postulated that a reduction in renal SIRT1 levels could play a key role in the pathogenesis of DKD and that restoration of SIRT1 will attenuate DKD. Cell division autoantigen 1 (CDA1) synergistically enhances the profibrotic effect of TGF-β in DKD by regulating the expression of the TGF-β type I receptor (TβRI). CDA1 has also been found to be an inhibitor of SIRT1 in the DNA damage response. Indeed, targeting CDA1 in experimental DKD not only attenuates diabetes-associated renal fibrosis but also attenuates the expression of key pro-inflammatory genes such as tumor necrosis factor-α (TNF-α) and Monocyte Che moattractant Protein-1 (MCP-1). In conclusion, there is a large body of experimental data to support the view that targeting CDA1 is a superior approach to directly targeting TGF-β in DKD since it is not only safe but also efficacious in retarding both fibrosis and inflammation.
NRF2: A potential target for the treatment of diabetic nephropathy
Authors: Zhang Jiahui , Anshul Fnu , Breidenbach Joshua D. , Liu Jing , Shaffner James
Published: August 2021

One of the major complications of diabetes mellitus is diabetic nephropathy (DN), the pathogenesis of which is primarily driven by oxidative stress. As a major regulator of antioxidant responses, the transcription factor nuclear factor erythroid 2-related factor 2 (NRF2) has recently attracted much interest. NRF2 is a primary defense mechanism against the cytotoxic effects of oxidative stress, involving heterogeneous detoxification, the production of antioxidants and anti-inflammatory molecules, DNA repair, nuclear chaperones, and proteasome systems. A myriad of studies in pre-clinical models of DN have consistently demonstrated a beneficial effect of NRF2 activation, suggesting that NRF2 is likely a promising target for treating DN. This has been further supported by findings from clinical trials of bardoxolone methyl, an activator of NRF2, despite the unexpected adverse cardiovascular effects. This review summarizes the support for therapeutic targeting of NRF2 in DN and emphasizes the need for the optimization of NRF2-based treatment with the minimization of potential adverse effects.
Emergency online learning during the first Covid-19 period: students’ perspectives from Bosnia and Herzegovina, North Macedonia, Poland and Turkey
Authors: Miloshevska Lina , Gajek Elżbieta , Džanić Nihada Delibegović , Hatipoğlu Çiler
Published: August 2021

In spring 2020 both teachers and learners experienced the interruption of education as it had been established for over 150 years and seemed to be unchangeable. The paper focuses on students’ perspectives on how they perceive the changes in learning due to the pandemic educational emergency response based on the results of a survey of students in four countries: Bosnia and Herzegovina, North Macedonia, Poland and Turkey. We aim at discussing the data collected at the end of the 2019-2020 Spring semester. The research focuses on the accessibility of the tools for learning, modes of instruction, as well as interaction patterns. In addition, we present students’ opinions on the difficulties they experienced, the learning strategies they adopted and what aspects of online learning should remain as a regular educational practice after the pandemic period.
Three-Bladed Horizontal Axis Water Turbine Simulations with Free Surface Effects
Authors: Rodríguez L. , Benavides-Moran A. , Laín S.
Published: August 2021

The water level above a hydrokinetic turbine is likely to vary throughout the season and even along the day. In this work, the influence of the free surface on the performance of a three bladed horizontal-axis turbine is explored by means of a three-dimensional, transient, two-phase flow computational model implemented in the commercial CFD software ANSYS Fluent 19.0. The k – ω SST Transition turbulence model coupled with the Volume of Fluid (VOF) method is used to track the air-water interface. The rotor diameter is D = 0 8m. Two operating conditions are analyzed: deep tip immersion (0.55D) and shallow tip immersion (0.19D). Three tip speed ratios are evaluated for each immersion. Simulation results show a good agreement with experimental data reported in the literature, although the computed torque and thrust coefficients are slightly underestimated. Details of the free surface dynamics, the flow past the turbine and the wake near the rotor are also discussed.
Green synthesis of thioxoimidazolidine derivative ligand: Spectroscopic, thermal and biological assignments of new Cu(II), Co(II), and Ni(II) chelates in neutral system
Authors: Alosaimi Abeer M. , Saad Hosam A. , Refat Moamen S. , Al-Hazmi Ghaferah H.
Published: August 2021

Eco-friendly synthesis of ethyl 3-(4-oxo-3-(1-(pyridin-3-yl)ethylideneamino)-2-thioxoimidazolidin-1-yl)propanoate (4) ligand (L) using microwave irradiation technique was described. The structure of thioxoimidazolidine derivative ligand compound has been established based on different types of analyses such as infrared, 1H-NMR, 13C-NMR, and mass spectra as well as elemental analysis. The copper, cobalt, and nickel(II) complexes with molecular formula [M(L)(H2O)4]Cl2 (where M = Co(II), Ni(II), and Cu(II), L = thioxoimidazolidine derivative ligand), have been prepared and well-characterized using microanalytical, conductivity measurements, magnetic, spectroscopic, and physical analyses. Upon the outcome results of analyses, the stoichiometry of the synthesized complexes is 1:1 (M:L). The molar conductance values concluded that the behavior of metal complexes was electrolytes. The 3-(4-oxo-3-(1-(pyridin-3-yl)ethylideneamino)-2-thioxoimidazolidin-1-yl)propanoate chelate acts as a monovalent bidentate fashion via nitrogen and oxygen atoms of both thioxoimidazolidine and propanoate ester moieties. The geometric structures of the synthesized metal complexes are an octahedral configuration based on spectroscopic and magnetic moment studies. The thermogravimetric assignments deduced that the presence of four coordinated water molecules. The synthesized copper(II), cobalt(II), and nickel(II) complexes were biologically checked against G+ and G- bacteria and two species of fungi (Aspergillus Nigaer, and Penicillium Sp.).
A importância dos cuidados multiprofissionais no tratamento da síndrome de Stevens-Johnson associada ao uso de Dimaleato de Afatinibe: relato de caso por Equipa de Medicina Dentária Hospitalar
Authors:   Hospital de Clínicas da Universidade Federal de Uberlândia, Uberlândia, Brasil, Morais Jéssica , Sol Izabella ,   Hospital de Clínicas da Universidade Federal de Uberlândia, Uberlândia, Brasil, Rodrigues Cristóvão ,   Hospital de Clínicas da Universidade Federal de Uberlândia, Uberlândia, Brasil, Macedo Dhiancarlo ,   Hospital de Clínicas da Universidade Federal de Uberlândia, Uberlândia, Brasil
Published: August 2021

A síndrome de Stevens-Johnson é relatada como uma reação incomum de hipersensibilidade tardia associada principalmente ao uso de medicamentos, e que se manifesta prioritariamente através de erupções cutâneas e ulcerações nas membranas mucosas que revestem a boca, o órgão genital e os olhos. O dimaleato de afatinibe é uma medicação inibidora da tirosina quinase que tem como alvo o recetor do fator de crescimento epidérmico, sendo indicada como monoterapia para o tratamento de carcinoma pulmonar de células não pequenas. A síndrome de Stevens-Johnson é um efeito adverso raro dessa medicação. O presente relato tem por objetivo apresentar um caso clínico de manifestação da Síndrome de Stevens-Johnson em um paciente jovem do sexo masculino após uso de dimaleato de afatinibe para tratamento de um adenocarcinoma pulmonar, com ênfase na perspetiva terapêutica odontológica em relação às manifestações orais de tal condição.