bluuebunny/crossref_metadata_2025_split huggingface dataset:
Meta-lens light-sheet fluorescence microscopy for in vivo imaging
Authors: Luo Yuan , Tseng Ming Lun , Vyas Sunil , Hsieh Ting-Yu , Wu Jui-Ching , Chen Shang-Yang , Peng Hsiao-Fang , Su Vin-Cent , Huang Tzu-Ting , Kuo Hsin Yu , Chu Cheng Hung , Chen Mu Ku , Chen Jia-Wern , Chen Yu-Chun , Huang Kuang-Yuh , Kuan Chieh-Hsiung , Shi Xu , Misawa Hiroaki , Tsai Din Ping 
Published: February 2022

Abstract
Light-sheet fluorescent microscopy has become the leading technique for in vivo imaging in the fields of disease, medicine, and cell biology research. However, designing proper illumination for high image resolution and optical sectioning is challenging. Another issue is geometric constraints arising from the multiple bulky components for illumination and detection. Here, we demonstrate that those issues can be well addressed by integrating nanophotonic meta-lens as the illumination component for LSFM. The meta-lens is composed of 800-nm-thick GaN nanostructures and is designed for a light-sheet well-adapted to biological specimens such as the nematode Caenorhabditis elegans (C. elegans). With the meta-lens, the complexity of the LSFM system is significantly reduced, and it is capable of performing multicolor fluorescent imaging of live C. elegans with cellular resolution. Considering the miniature size and plane geometry of the meta-lens, our system enables a new design for LSFM to acquire in vivo images of biological specimens with high resolution.
Crystal structure of a second modification of Pachypodol, C18H16O7
Authors: Xu Chuan-Yan , Dong Ming-Hong , Ye Jiang-Hai , Zhao Chen-Liang , Zou Juan , Zhang Jing-Jie 
Published: February 2022

Abstract
C18H16O7, monoclinic, P21/c (no. 14), a = 7.3948(3) Å, b = 24.2947(9) Å, c = 17.3201(6) Å, β = 93.063(1)°, V = 3107.2(2) Å3, Z = 4, R

gt
(F) = 0.0427, wR

ref
(F
2) = 0.1241, T = 300(2) K.
The crystal structure of catena-poly[(m2-4,4′-bipyridine-κ2
N:N)-bis(6-phenylpyridine-2-carboxylato-κ2
N,O) zinc(II)], C34H24N4O4Zn
Authors: Wang Li-Hua , Tai Xi-Shi , Xia Yu-Pei 
Published: February 2022

Abstract
C34H24N4O4Zn, monoclinic, I2/a (no. 15), a = 18.2546(14) Å, b = 11.0510(7) Å, c = 16.1874(15) Å, β = 119.605(11)°, V = 2839.2(5) Å3, Z = 4, R

gt
(F) = 0.0302, wR

ref
(F
2) = 0.0694, T = 200 K.
The crystal structure of (4SR)-7-(3,4-dichlorobenzyl)-4,8,8-trimethyl-7,8-dihydroimidazo[5,1c][1,2,4]triazine-3,6(2H,4H)-dione, C15H16Cl2N4O2
Authors: Tzvetkov Nikolay T. , Peeva Martina I. , Tsakovska Ivanka , Milella Luigi , Pajeva Ilza , Stammler Hans-Georg 
Published: February 2022

Abstract
C15H16Cl2N4O2, monoclinic, P21/c (no. 14), a = 26.2014(7) Å, b = 7.59320(10) Å, c = 17.9766(4) Å, β = 109.217(3)°, V = 3377.20(14) Å3, Z = 8, R

gt
(F) = 0.0503, wR

ref
(F
2) = 0.1411, T = 100.0(1) K.
Caves, Senses, and Ritual Flows in the Iberian Iron Age: The Territory of Edeta
Authors: Machause López Sonia , Skeates Robin 
Published: February 2022

Abstract
This article seeks to contribute to recent scholarship on ritual performances in caves, sensory archaeology and ritual journeys, and to stimulate fresh questions and debate about society, ritual, and mobility in the Iberian Iron Age. It uses an updated methodology for recording and interpreting – more contextually, holistically, and systematically – the multisensory affordances of caves and their landscapes on embodied human movements, experiences, and perceptions. It applies this approach to two caves situated in the territory thought by archaeologists to have been controlled by the Iberian Iron Age oppidum of Edeta/Tossal de Sant Miquel in the Valencia province: both interpreted as the destination for “pilgrimages” and related ritual performances, especially during the fifth to third centuries BC. In particular, the study presents a thick and multifaceted interpretative scenario of ritual flows to, through, and from these underground places, divided analytically into successive experiential stages. It concludes by questioning the current model of Iberian Iron Age ritual as an elite-dominated process and instead emphasises variability in multisensory ritual decision-making, practices and experiences over space, time, and culture.
ACTIVATE! Change Drivers: blame-attribution and active citizenship on a South Africa youth blog
Authors: Conradie Marthinus Stander 
Published: February 2022

Abstract
Processes of blame-attribution can be conceptualised as socially-situated and discursively-mediated events that feature attempts to assign meaning to harmful (or at least potentially harmful) occurrences. Part of the process involves the search for culprits and subsequent argumentation as to the blameworthiness of those singled out for blame. This study conducts a discourse analysis of blame-attribution in 33 online opinion pieces, posted on the website of the civil society organisation: ACTIVATE! Change Drivers. It concentrates on arguments that address the nexus between youth activism, active citizenship, the legacy of Apartheid and blame for the numerous problems afflicting the South African youth. The most recurring arguments hinged on constructions of the South African government as responsible to supporting the capacity of the contemporary youth to participate effectively in democracy, particularly since the youth continue to endure the repercussions of Apartheid. My analysis details the discursive repertoires through which this proposition is made, and considers its implications for research into contemporary online youth cultures and democratic argumentation.
An Encounter between a Teacher and Child with ASD in a Pre-School Environment
Authors: Juškienė Vaiva , Voidogaitė Viktorija 
Published: February 2022

The article focuses on the phenomenon of the first meeting between an educator and a child on the autism spectrum and the an educator’s experiences during the encounter. An analysis of the scientific literature shows that the number of autistic children in Lithuania is increasing. The text describes a meeting between a pre-school and a pre-primary school educator and a child with autism spectrum disorders. The analysis unfolds the experience of particular educators when they meet a child with ASD in an ordinary pre-school group. During a hermeneutical phenomenological analysis, the experience of the educators are based on two existential subjects: experienced relationship and experienced body. During the first meeting with a child with ASD, educators attempted to establish a relationship with the child. Although each participant of the analysis experienced this beginning individually, all of them were confronted with a challenge in communication while establishing these relationships. Autistic children avoided the methods of relation contracting that were usual to educators. When educators contacted with the autistic children, their experience unfolded through the children’s bodily experience (appearance and behaviour).
An Architectural Model for the 21st Century School: Synthesis of Research Results
Authors: Vilbikienė Grėtė 
Published: February 2022

This paper is intended to identify the most relevant and most frequently discussed research topics in the literature, including pedagogy and the physical learning environment. It can be stated that the goals and objectives of education may even indirectly be related to the physical learning environment; therefore, it is relevant to analyze the ways, means, aspects and methodologies of this interface in the research works of other researchers. To achieve this goal, the article presents a systematic analysis of literature sources. Based on the conclusions of the systematic analysis and the goals and objectives of modern education, the model of a good school in the general case was formed and presented in the article. This is the 21st century school model that reveals those factors and characteristics of the physical learning environment that would help create a physical learning environment corresponding to modern education.
Language Learning Attitudes of Young Learners: Differences between Syrian Refugee Learners and Turkish Learners
Authors: Asmali Mehmet , Sayın Sanem Dilbaz 
Published: February 2022

Welcoming more than 1.7 million refugee and asylum-seeker children, Turkey has put a considerable effort in turning this tragedy into an advantage for these children in terms of their education. Language teaching has played a remarkable role in this effort. Turkey has offered both Turkish and English language courses to these people. Considering the significance of English as a global language for social integration and future studies, this study attempted to investigate young Syrian refugee students’ attitudes toward English language and their reasons to learn English. Moreover, their perspectives were compared with Turkish young learners. Thirty-eight Turkish and 26 Syrian 5th graders (aged 10–11) voluntarily participated in this study. The findings indicated that learning English makes Syrian students happy, whereas Turkish students enjoy the fun activities in English classes. Learning English is considered both relatively easy and important by both groups. Turkish and Syrian young learners’ reasons to learn English differed slightly. Suggestions were provided for refugee young learners to overcome the potential problems regarding language learning.
Pupils’ Literacy Problems in the Essays of Lithuanian Language and Literature State Matura Examinations: Gaps in the Knowledge of Syntax
Authors: Bučienė Laimutė 
Published: February 2022

Based on the syntactic analysis of the essays composed in the course of the matura examination in 2019, the article seeks to answer the following major questions: How well are 12th grade pupils capable of observing the syntactic norms while writing a fluent text? Which syntactic phenomena do pupils find the most troublesome?A quantitative study revealed that the pupils have an insufficient knowledge of syntactic norms. Pupils find case government, the combinability of words, the choice of word forms in a phrase and in a sentence the most troublesome. The greatest syntactic problem is the incorrect use of cases. What is most obvious and problematic concerning case-related mistakes is the use of the instrumental case to express a state instead of the second component of double cases. The expression of the indefinite amount of things and the whole is also rather troublesome (the use of the accusative case instead of the genitive case expressing an indefinite amount or a part). In their essays, pupils often make mistakes in the use of the gerund. The mistakes related to the composition of the complex sentence are also rather numerous.It should be noted that the teaching of language system-related topics should pay adequate attention to the practical issues of language teaching as well as to tasks focusing on the correct usage of the spoken and written language.The errors made by 12th grade pupils show that it is essential to improve the skills of the correct usage of syntactic constructions in the final grades with due regard to the individual needs of pupils and the class.
Fine-grained Prediction of Political Leaning on Social Media with Unsupervised Deep Learning
Authors: Fagni Tiziano , Cresci Stefano 
Published: February 2022

Predicting the political leaning of social media users is an increasingly popular task, given its usefulness for electoral forecasts, opinion dynamics models and for studying the political dimension of polarization and disinformation.
Here, we propose a novel unsupervised technique for learning fine-grained political leaning from the textual content of social media posts. Our technique leverages a deep neural network for learning latent political ideologies in a representation learning task. Then, users are projected in a low-dimensional ideology space where they are subsequently clustered. The political leaning of a user is automatically derived from the cluster to which the user is assigned. We evaluated our technique in two challenging classification tasks and we compared it to baselines and other state-of-the-art approaches. Our technique obtains the best results among all unsupervised techniques, with micro F1 = 0.426 in the 8-class task and micro F1 = 0.772 in the 3-class task. Other than being interesting on their own, our results also pave the way for the development of new and better unsupervised approaches for the detection of fine-grained political leaning.
What Geometry for teaching? Appropriations of Experts on pedagogical studies mission in Europe, late 19th century
Authors: Da Conceição Gabriel Luís 
Published: February 2022

Background: The training of teachers who teach mathematics is surrounded by knowledge that changes over time. These changes are for several moments mobilized by specialists, in this context, the official documents are possible historical sources for reading and analyzing changes. Objective: To analyze the systematizations of a “Geometry for teaching” put into circulation for the training of teachers, at the end of the 19th century, in Rio de Janeiro, at this time the Republic, by professors Amélia Fernandes da Costa, Luiz Augusto dos Reis and Manoel José Pereira Frazão, appointed by the republican power for the mission of pedagogical studies in Europe. Data collection and analysis: Data were collected from the travel records of commissioners, and also from publications in educational, analysed from the perspective of Cultural History. Design: Use for the study the official reports found by the documents and Revista Pedagogica, printed for teachers, these documents, acquired or accumulated by the specialists in question, were solved and problematized following the following investigation steps: recompilation of teaching experiences; comparative analysis of teachers' knowledge; analysis of systematization and use of knowledge as knowledge (Valente, 2018; 2020). Setting and Participants: It is a historiographical study in documents. Results: An analysis of the sources revealed that the performance of the documents, as well as their active participation in political issues and primary education, the recognition of peers, a call from the State for the pedagogical trip and the consequent responsibility to produce an official report, placed them in the category of Experts, thus allowing us to qualify them and put into circulation a proposal for a new “Geometry for teaching”, characteristic of intuitive times, and against the previous proposal. Conclusions: The “Geometry for teaching” put into circulation, should be mobilized by teachers in close relationship with Design and Handicrafts and was not structured as a subject in primary school.
Fake News Phenomenon: Formation of Beliefs under Pragmatic Optics and Mathematical Education
Authors: Souza Leandro De Oliveira , Araújo Jussara De Loiola 
Published: February 2022

Background: Few studies in mathematics education have been looking at the new dynamics of communication with focus on the analysis of speeches propagated by false news. This social phenomenon is worrying: news that uses mathematical arguments to guide, shape, and reflect public opinion and popular thinking based on misleading information. Objectives: The aim of this investigation was to understand the role of mathematics education in the process of strengthening democracy. Data collection and analysis: A video published on a YouTube channel, in which mathematical arguments are used to convince public opinion about a certain point of view, was the object of the study whose result is presented in this paper. Design: With theoretical-methodological procedures that are based on the pragmatic theory of fixation of beliefs and on the verification of the mathematical content, the analysis adopted a qualitative approach. Setting and Participants: This is a study about a video considered false by news agencies, aired by a famous Brazilian journalist. Results: The study of fake news and desinformation scenario has allowed us to observe that mathematical speeches linked to the ideology of mathematical certainty are responsible for the establishment of beliefs and the formation of opinions by authority and tenacity methods. Conclusions: We conclude that mathematical models and mathematical discourses used in virtual communication environments can be responsible for camouflaging the human factor in political decisions and obscuring the visibility of ethical and morality variables.
Caracterização Eletroquímica e Avaliação do Coeficiente de Difusão de Compostos de Inclusão Formados entre Ciclodextrinas e Ferroceno
Authors: Rodrigues de Carvalho Fernando , Da Silva Rafael 
Published: February 2022

ResumoCiclodextrinas (CDs) são macromoléculas cíclicas com formato de cone, cujo interior hidrofóbico e exterior hidrofílico permite a formação de compostos de inclusão com espécies pouco solúveis em água, como por exemplo o ferroceno (Fc). Como o Fc tem potencial redox bem definido, este atua como sonda para avaliar as propriedades eletroquímicas e o coeficiente de difusão dos compostos de inclusão. Este trabalho tem o intuito de realizar uma caracterização eletroquímica dos compostos de inclusão β-CD/Fc e g-CD/Fc e avaliar seus coeficientes de difusão, empregando método eletroquímico, a fim de atestar que técnicas eletroquímicas são capazes de monitorar o crescimento de autoagregados moleculares. Os resultados mostram que há formação dos compostos de inclusão e que estes, assim como o Fc, apresentam processo redox reversível e controlado por difusão na superfície do eletrodo em uma ampla faixa de velocidade de varredura. Apesar de serem formadas pelas mesmas unidades de glicose, o interior das CDs aparenta ter ambientes químicos diferentes. Não houve variação significativa do coeficiente de difusão dos compostos de inclusão à medida que suas concentrações aumentam. Este fato sustenta a proposta de que técnicas eletroquímicas, como voltametria de pulso diferencial, são viáveis no monitoramento de processo de autoagregação molecular em meio aquoso de moléculas eletroativas.Palavras-chave: Eletroquímica, Coeficiente de Difusão, Compostos de Inclusão.
AbstractCyclodextrins (CDs) are cyclic cone-shaped macromolecules, whose hydrophobic interior and hydrophilic exterior allow the inclusion compounds formation with species that are poorly soluble in water, such as ferrocene (Fc). As the Fc molecule has well-defined redox potential, it acts as probe to evaluate the electrochemical properties and the inclusion compounds diffusion coefficient. This work aims to perform an electrochemical characterization of the inclusion compounds β-CD/Fc and -CD/Fc and to evaluate their diffusion coefficients, applying an electrochemical method, in order to attest that electrochemical techniques are capable of monitoring the molecular self-aggregation process. The results show that the inclusion compounds are formed and that these compounds, such as the Fc, have a reversible redox process controlled by diffusion on the electrode surface over a wide sweeping speed range. Despite being formed by the same glucose units, the CDs interior seems to have different chemical environments. There was no significant variation in the inclusion compounds diffusion coefficient as their concentrations increased. This fact supports the proposal that electrochemical techniques, such as differential pulse voltammetry, are feasible in monitoring the self-aggregation process of small electroactive molecules in aqueous medium.
Keywords: Electrochemistry, Diffusion Coefficient, Inclusion Compounds.
Computação Ubíqua no combate ao Covid-19: Detecção de Ação de Retirada de Máscara Através de um Protótipo Vestível
Authors: Silva Christian Gianelli da , Sampaio Rafaela Aparecida Garcia 
Published: February 2022

ResumoA detecção de atividades através de sensores inerciais pode contribuir de maneira significativa para a manutenção da vida dos seres humanos, principalmente se tratando do monitoramento de atividades rotineiras e sinais biológicos. Diante de uma atual Pandemia, o uso de máscaras em ambientes públicos, se faz indispensável para diminuição do contágio do vírus COVID-19. Desta forma, o presente trabalho concentra- se na análise de uma tecnologia vestível para aquisição de dados em diferentes ações de retirada da máscara facial utilizada como forma de prevenção contra o vírus COVID-19.
Palavras-chave: COVID-19. Computação Ubíqua. Protótipo Vestível. Análise de Dataset.
AbstractThe detection of activities through inertial sensors can contribute significantly to the maintenance of human life, especially when it comes to monitoring routine activities and biological signals. In the face of a current pandemic, the use of masks in public environments is essential to reduce the contagion of the COVID-19 virus. Thus, the present work focuses on the analysis of a wearable technology for data acquisition in different actions to remove the facial mask used as a means of preventing the COVID-19 virus.
Keywords: COVID-19, Ubiquitous Computing. Wearable Prototype. Dataset analysis.
Análise Numérica das Propriedades Reológicas dos Polímeros Fundidos em Expansões Repentinas
Authors: Fontana Jaqueline , Alves de Miranda Diego , Silva Vanderlei da , Fernandes Anderson de Carvalho , Neto Angelo Reck , Garcia Cristiane Luzia Salazar 
Published: February 2022

ResumoO estudo de simulação numérica sobre reologia de polímeros fundidos vem evoluindo de acordo com o aperfeiçoamento dos softwares e hardwares. Analisar o comportamento reológico destes polímeros é de suma importância principalmente no setor automobilístico, que procura sempre substituir os materiais mais pesados por materiais mais leves. O presente trabalho tem como objetivo analisar numericamente o comportamento das variáveis temperatura, velocidade, queda de pressão e viscosidade do Polióxido de Metileno, tratado no problema como um fluído não-Newtoniano e incompressível, durante um processo de expansão abrupta, caso processo bem comum na transformação de injeção de termoplásticos. Para obtenção dos resultados desejados foi realizada uma simulação numérica tendo como embasamento teórico as equações de Navier-Stokes para continuidade, momento e energia e o modelo de viscosidade de Cross – WLF considerando o estado estacionário. O método de volumes finitos foi utilizado para a discretização das equações de governo e o método de adimensionalização foi definido para comparar as curvas dos perfis de temperatura, velocidade e viscosidade obtidos e comparando com outros autores. As simulações demonstraram-se satisfatórias e o modelo de viscosidade conseguiu ser validado.
Palavras-chave: Fluído não-Newtoniano. Injeção de Plásticos. Simulação Numérica.
AbstractThe study of numerical simulation on fused polymer rheology has been evolving in line with the improvement of software and hardware. Analyzing the rheological behavior of these polymers is of paramount importance especially in the automotive sector, which always seeks to replace heavier materials with lighter materials. The present work aims to numerically analyze the behavior of the variables temperature, speed, pressure drop and viscosity of Methylene Polyoxide, treated in the problem as a non-Newtonian and incompressible fluid, during an abrupt expansion process, a very common process in injection processing of thermoplastics. In order to obtain the desired results, a numerical simulation was performed with the theoretical basis of the Navier-Stokes equations for continuity, momentum and energy and the Cross - WLF viscosity model considering the steady state. The finite volume method was used to discretize the government equations and the dimensioning method was defined to compare the curves of the temperature, speed and viscosity profiles obtained and comparing with other authors. The simulations proved to be satisfactory and the viscosity model was able to be validated.
Keywords: Non-Newtonian Fluid. Plastic Injection. Numerical Simulation.