bluuebunny/crossref_metadata_2025 huggingface dataset:
The Formation Process of the First Halo Coronal Mass Ejection in Solar Cycle 25: Magnetic Cancellation, Bidirectional Jet, and Hot Channel
Authors: Yan Xiaoli , Wang Jincheng , Guo Qiaoling , Xue Zhike , Yang Liheng , Tan Baolin
Published: September 2021

To better understand the trigger mechanism of a coronal mass ejection (CME), we present the evolution of a CME source region (active region NOAA 12790) and the formation of a hot channel before the occurrence of the first halo CME in solar cycle 25. Through analyzing the evolution of Solar Dynamics Observatory/Helioseismic and Magnetic Imager line-of-sight magnetograms, it is found that continuous magnetic cancellation occurs at the polarity inversion line (PIL) in this active region. With ongoing magnetic cancellation, several bidirectional jets and unidirectional jets occur along the large-scale arched magnetic loops. A hot channel forms during the first bidirectional jet. After the occurrence of the fourth bidirectional jet, the hot channel immediately erupts and produces a C-class flare, a cusp structure, and a halo CME. It is worth pointing out that the cusp structure only appears in the 131 Å and 94 Å observations (temperature about 10 MK). The obvious contraction of the newly formed loops is observed at the top of the cusp structure. The observations reveal a clear physics process: magnetic cancellation of a bipolar magnetic field at the PIL results in the occurrence of the bidirectional/unidirectional jets and the formation of the hot channel. The axial magnetic flux feeding for the hot channel through the continued magnetic cancellation leads to the hot channel eruption, which results in the formation of the hot cusp structure and the occurrence of the C-class flare and the halo CME.
On the Hard Gamma-Ray Spectrum of the Potential PeVatron Supernova Remnant G106.3 + 2.7
Authors: Bao Yiwei , Chen Yang
Published: September 2021

The Tibet ASγ experiment has measured a γ-ray flux of supernova remnant G106.3+2.7 of up to 100 TeV, suggesting it is potentially a “PeVatron.” Challenges arise when the hadronic scenario requires a hard proton spectrum (with spectral index ≈1.8), while usual observations and numerical simulations prefer a soft proton spectrum (with spectral index ≥2). In this paper, we explore an alternative scenario to explain the γ-ray spectrum of G106.3+2.7 within the current understanding of acceleration and escape processes. We consider that cosmic ray particles are scattered by turbulence driven by Bell instabilities. The resulting hadronic γ-ray spectrum is novel, dominating the contribution to the emission above 10 TeV, and can explain the bizarre broadband spectrum of G106.3+2.7 in combination with leptonic emission from the remnant.
Isotope Dichotomy from Solar Protoplanetary Disk Processing of 150Nd-rich Stellar Ejecta
Authors: Susan Saji Nikitha , Schiller Martin , Christian Holst Jesper , Bizzarro Martin
Published: September 2021

We use high-precision neodymium isotope data for sequentially acid-leached components of the primitive carbonaceous chondrite Tagish Lake to identify a non-classical 150Nd-rich presolar carrier phase that has not been identified as of yet in meteorites. The distinct isotopic signature of this carrier can be attributed to the intermediate neutron capture process (i-process) occurring in asymptotic giant branch (AGB), super-AGB, or post-AGB stars or, alternatively, the slow capture process (s-process) occurring in rotating massive stars. The 150Nd-rich carrier appears to be heterogeneously distributed in the solar protoplanetary disk resulting in systematic isotope variations between carbonaceous and non-carbonaceous solar system materials. Carbonaceous chondrites that accreted in the outer disk are depleted in this carrier relative to non-carbonaceous materials that accreted in the terrestrial planet-forming region. Calcium-aluminum-rich inclusions that represent the earliest formed disk solids record the largest depletion of this carrier. This distribution pattern is contrary to that seen for the carriers of other neutron-rich isotope anomalies (48Ca, 54Cr, 95,97Mo, etc.) that have defined carbonaceous/non-carbonaceous isotope dichotomy so far. Irrespective of the exact astrophysical origin of these carriers, divergent distribution of presolar dust as a function of physicochemical processing in the solar protoplanetary disk best explains the solar system isotope dichotomy as opposed to changes in the composition of the infall.
The Per-Tau Shell: A Giant Star-forming Spherical Shell Revealed by 3D Dust Observations
Authors: Bialy Shmuel , Zucker Catherine , Goodman Alyssa , Foley Michael M. , Alves João , Semenov Vadim A. , Benjamin Robert , Leike Reimar , Enßlin Torsten
Published: September 2021

A major question in the field of star formation is how molecular clouds form out of the diffuse interstellar medium (ISM). Recent advances in 3D dust mapping are revolutionizing our view of the structure of the ISM. Using the highest-resolution 3D dust map to date, we explore the structure of a nearby star-forming region, which includes the well-known Perseus and Taurus molecular clouds. We reveal an extended near-spherical shell, 156 pc in diameter (hereafter called the “Per-Tau Shell”), in which the Perseus and Taurus clouds are embedded. We also find a large ring structure at the location of Taurus (hereafter called the “Tau Ring”). We discuss a formation scenario for the Per-Tau Shell, in which previous stellar and supernova feedback events formed a large expanding shell, where the swept-up ISM has condensed to form both the shell and the Perseus and Taurus molecular clouds within it. We present auxiliary observations of H i, Hα, 26Al, and X-rays that further support this scenario, and estimate the Per-Tau Shell’s age to be ≈6–22 Myrs. The Per-Tau shell offers the first 3D observational view of a phenomenon long-hypothesized theoretically, molecular cloud formation and star formation triggered by previous stellar and supernova feedback.
Internet of Things Vulnerabilities in Military Environments
Authors: Toth Andreas
Published: September 2021

IoT devices (sensors, drones, cameras) are gaining more and more emphasis on military operations. The application of IoT elements in the military environment increases situational awareness and supports the acquisition and maintenance of information superiority. The information they provide about the enemy, the area of operations, and the location and status of our soldiers and assets can contribute to the successful execution of operations at the tactical, operational and strategic levels. However, they can also pose serious threats if their vulnerabilities allow the data they collected to leak or they provide access to the info-communication networks used for the enemy. In this article, the author examined the vulnerabilities of these IoT devices using keyword analysis. After drawing conclusions from the analysis of the relevant literature, he compared the results with the general-purpose IoT threats and attacks typical of today, like distributed denial of service attacks, security, software, security and privacy issues.
Evaluation of Possible Approaches to Meteorological Techniques of Artillery Manual Gunnery after the Adoption of Automated Fire Control System
Authors: Ivan Jan , Blaha Martin , Šustr Michal , Havlík Tomáš
Published: September 2021

The article deals with the artillery manual gunnery in accordance with the modernization of the czech artillery. The article describes the results of research aimed at innovating manual (alternative) methods of determining the firing data so that they are applicable on the contemporary battlefield and are compatible with the nature of the data used by artillery within the NATO. The issue of the article is aimed primarily at determining the firing data by the use of meteorological techniques, while presenting the outputs of a comparative analysis of procedures used in the czech artillery with the procedures applied by the US army. The main contribution of the article is a critical evaluation of the approaches of both armies and a proposal for innovation of existing procedures so that the most beneficial requirements are applied and negatives are eliminated.
Un laboratoire ouvert, un atelier et un espace de vie
Authors: La MYNE
Published: September 2021

Cet article, rédigé collectivement par les membres de la communauté, relate leur expérience née de l’envie de créer des cadres de réappropriation de la recherche-action autour des thèmes de la transition écologique. La MYNE se pose comme un tiers-lieu libre et ouvert qui regroupe à la fois les fonctions de laboratoire open source , d’atelier de fabrication et d’espace de vie. Plurielle dans ses orientations et ses pratiques, elle est axée en particulier sur l’expérimentation et la documentation en licences libres, non sans adopter une attitude réflexive sur le partage des savoirs et ce qu’elle nomme la bientraitance.
Sciure et semis… bourgeons et brouillons… récoltes et déconstructions
Authors: Granger Charlotte
Published: September 2021

Le Terroir est un camping singulier et mutant, qui a pour partie évolué en lieu de vie partagé. Son devenir mobilise une trentaine de personnes locataires à l’année, liées à un propriétaire et son entreprise individuelle, qui mènent en groupe l’entretien, la mise en vie de l’endroit et l’accueil touristique saisonnier. Espace à la fois public et privé, Le Terroir abrite et fait la démonstration des possibles d’une vie en habitat léger grâce à onze yourtes, des caravanes, chalets, tiny et mobile homes . Ces cinq dernières années ont été dédiées à l’expérimentation collective. Professionnels et amateurs y ont partagé des projets en auto-construction, maraîchage, formation et événements culturels. S’y précise peu à peu un fonctionnement collectif qui permet de redistribuer responsabilité et autorité.
Blow-up results of the positive solution for a weakly coupled quasilinear parabolic system
Authors: Ding Juntang , Dong Chenyu
Published: September 2021

The main purpose of the present paper is to study the blow-up problem of a weakly coupled quasilinear parabolic system as follows:

   \begin{document}$ \left\{ \begin{array}{ll} u_{t} = \nabla\cdot\left(r(u)\nabla u\right)+f(u,v,x,t), & \\ v_{t} = \nabla\cdot\left(s(v)\nabla v\right)+g(u,v,x,t) &{\rm in} \ \Omega\times(0,t^{*}), \\ \frac{\partial u}{\partial\nu} = h(u), \ \frac{\partial v}{\partial\nu} = k(v) &{\rm on} \ \partial\Omega\times(0,t^{*}), \\ u(x,0) = u_{0}(x), \ v(x,0) = v_{0}(x) &{\rm in} \ \overline{\Omega}. \end{array} \right. $\end{document}

Here \begin{document}$ \Omega $\end{document} is a spatial bounded region in \begin{document}$ \mathbb{R}^{n} \ (n\geq2) $\end{document} and the boundary \begin{document}$ \partial\Omega $\end{document} of the spatial region \begin{document}$ \Omega $\end{document} is smooth. We give a sufficient condition to guarantee that the positive solution \begin{document}$ (u,v) $\end{document} of the above problem must be a blow-up solution with a finite blow-up time \begin{document}$ t^* $\end{document}. In addition, an upper bound on \begin{document}$ t^* $\end{document} and an upper estimate of the blow-up rate on \begin{document}$ (u,v) $\end{document} are obtained.
Stochastic fractional integro-differential equations with weakly singular kernels: Well-posedness and Euler–Maruyama approximation
Authors: Dai Xinjie , Xiao Aiguo , Bu Weiping
Published: September 2021

This paper considers the initial value problem of general nonlinear stochastic fractional integro-differential equations with weakly singular kernels. Our effort is devoted to establishing some fine estimates to include all the cases of Abel-type singular kernels. Firstly, the existence, uniqueness and continuous dependence on the initial value of the true solution under local Lipschitz condition and linear growth condition are derived in detail. Secondly, the Euler–Maruyama method is developed for solving numerically the equation, and then its strong convergence is proven under the same conditions as the well-posedness. Moreover, we obtain the accurate convergence rate of this method under global Lipschitz condition and linear growth condition. In particular, the Euler–Maruyama method can reach strong first-order superconvergence when \begin{document}$ \alpha = 1 $\end{document}. Finally, several numerical tests are reported for verification of the theoretical findings.
Global weak solutions to the generalized mCH equation via characteristics
Authors: Zeng Fanqin , Gao Yu , Xue Xiaoping
Published: September 2021

In this paper, we study the generalized modified Camassa-Holm (gmCH) equation via characteristics. We first change the gmCH equation for unknowns \begin{document}$ (u,m) $\end{document} into its Lagrangian dynamics for characteristics \begin{document}$ X(\xi,t) $\end{document}, where \begin{document}$ \xi\in\mathbb{R} $\end{document} is the Lagrangian label. When \begin{document}$ X_\xi(\xi,t)>0 $\end{document}, we use the solutions to the Lagrangian dynamics to recover the classical solutions with \begin{document}$ m(\cdot,t)\in C_0^k(\mathbb{R}) $\end{document} (\begin{document}$ k\in\mathbb{N},\; \; k\geq1 $\end{document}) to the gmCH equation. The classical solutions \begin{document}$ (u,m) $\end{document} to the gmCH equation will blow up if \begin{document}$ \inf_{\xi\in\mathbb{R}}X_\xi(\cdot,T_{\max}) = 0 $\end{document} for some \begin{document}$ T_{\max}>0 $\end{document}. After the blow-up time \begin{document}$ T_{\max} $\end{document}, we use a double mollification method to mollify the Lagrangian dynamics and construct global weak solutions (with \begin{document}$ m $\end{document} in space-time Radon measure space) to the gmCH equation by some space-time BV compactness arguments.
Convergence from two-species Vlasov-Poisson-Boltzmann system to two-fluid incompressible Navier-Stokes-Fourier-Poisson system
Authors: Fang Zhendong , Wang Hao
Published: September 2021

In this paper, we obtain the uniform estimates with respect to the Knudsen number \begin{document}$ \varepsilon $\end{document} for the fluctuations \begin{document}$ g^{\pm}_{\varepsilon} $\end{document} to the two-species Vlasov-Poisson-Boltzmann (in briefly, VPB) system. Then, we prove the existence of the global-in-time classical solutions for two-species VPB with all \begin{document}$ \varepsilon \in (0,1] $\end{document} on the torus under small initial data and rigorously derive the convergence to the two-fluid incompressible Navier-Stokes-Fourier-Poisson (in briefly, NSFP) system as \begin{document}$ \varepsilon $\end{document} go to 0.
An orthogonal equivalence theorem for third order tensors
Authors: Qi Liqun , Ling Chen , Liu Jinjie , Ouyang Chen
Published: September 2021

In 2011, Kilmer and Martin proposed tensor singular value decomposition (T-SVD) for third order tensors. Since then, T-SVD has applications in low rank tensor approximation, tensor recovery, multi-view clustering, multi-view feature extraction, tensor sketching, etc. By going through the Discrete Fourier Transform (DFT), matrix SVD and inverse DFT, a third order tensor is mapped to an f-diagonal third order tensor. We call this a Kilmer-Martin mapping. We show that the Kilmer-Martin mapping of a third order tensor is invariant if that third order tensor is taking T-product with some orthogonal tensors. We define singular values and T-rank of that third order tensor based upon its Kilmer-Martin mapping. Thus, tensor tubal rank, T-rank, singular values and T-singular values of a third order tensor are invariant when it is taking T-product with some orthogonal tensors. Some properties of singular values, T-rank and best T-rank one approximation are discussed.
Pratiques argumentatives et dynamique interactionnelle des échanges en classe de FLE : analyse pragmatique des interactions verbales d’apprenants algériens en situation de débat
Authors: Hocine Naima
Published: September 2021

La compétence en expression orale, qui représente l’un des aspects les plus importants de l’acquisition d’une langue étrangère, s’acquiert dans des situations d’interaction verbale. Le présent article a pour objectif de décrire la dynamique interactionnelle qui se développe dans des activités communicatives argumentatives en classe de langue. Cette étude qui porte sur des débats conçus comme des activités d’apprentissage et qui se sont déroulés dans des classes de FLE (Français Langue Etrangère) avec des apprenants algériens de première année secondaire, consiste à dégager et analyser les stratégies de communication utilisées par les apprenants ainsi que celles utilisées par l’enseignant pour les amener à prendre la parole. Les questions posées, les tours de parole, l’attitude de l’enseignant et les stratégies de communication dans une classe constituent les points essentiels de notre observation. Toutes les situations de communication orale dans lesquelles les élèves s’expriment en français ont été transcrites. Pour l’analyse des matériaux, la méthode est principalement qualitative avec quelques entrées quantitatives. L’étude peut être décrite comme une étude de cas.
« Dites ce que je dis, ne dites pas ce que je vous dis de dire » ? Dilemmes et paradoxes de l’activité discursive et métadiscursive dans l’enseignement et l’apprentissage de l’oral en langues étrangères
Authors: Bouchard Robert
Published: September 2021

Cet article s’intéresse à l’enseignement de l’oral, cible privilégiée des classes de langue étrangère. Dans ces classes le dire est en même temps un outil d’enseignement et un but d’apprentissage. Or chez l’enseignant natif en particulier, l’oral, « incorporé », échappe pour une bonne part à un contrôle conscient. Il peut exister de fortes divergences entre ce qu’il veut enseigner, et ce qu’il « manifeste » naturellement dans sa propre pratique orale en classe. Ce sont ces manifestations discursives authentiques que nous voudrions observer ici en les confrontant aux discours oraux des apprenants mais aussi aux commentaires épi/métalinguistiques que l’enseignant tient par ailleurs. Pour ce faire, nous analyserons plus précisément divers moments d’une classe de FLE (Français Langue Etrangère), en France, destinée à des étudiants étrangers et animée par une enseignante native (Corpus LiYan 2007)2.
Tacite et implicite : une caractérisation des productions langagières didactiques et de leurs enjeux épistémiques
Authors: Dépret Christian , Maitre Jean-Philippe
Published: September 2021

Dans les échanges de signes courants, et même si les connaissances des individus sont variables, de nombreux signes sont utilisés comme si leur signification était une évidence partagée. Mais l’enseignant ne peut pas simplement présumer la compréhension de son discours par ses élèves (en particulier des termes clés, enjeux d’enseignement). Lors des toutes premières utilisations d’un signe, ce que ce signe désigne ne pourra pas être saisi immédiatement par l'élève. La compréhension ne pourra se faire qu’indirectement, sur la base d’autres signes, dont les significations sont supposées connues. Incombe ainsi à l'enseignant une gestion de l'espace sémiotique dans lequel évoluent les élèves. Dans cet article, nous développons une réflexion théorique dans le but d’éclairer cette gestion. Nous commencerons par présenter différentes acceptions du signe en insistant sur son lien à la connaissance. Cela nous amènera dans une deuxième partie à considérer les notions d’implicite et de tacite. Enfin dans une troisième et dernière partie, nous tâcherons de rendre saillants les phénomènes et problématiques didactiques qui y sont liés au sein du discours de l’enseignant.
La construction du cadre de la scolarisation comme contexte de littératie par les enseignants brésiliens
Authors: Mamede Maira
Published: September 2021

Les difficultés scolaires, notamment chez les élèves d’origine populaire tiennent en grande partie à la faible familiarité avec la culture écrite. Mais, au-delà des difficultés qui peuvent trouver leur source dans l’origine sociale des élèves, il semble nécessaire d’interroger la manière dont se fait la construction du cadre de la scolarisation comme contexte de littératie. Notre objectif était d’identifier des modes de faire pédagogiques à l’œuvre dans l’école publique brésilienne, recevant exclusivement un public défavorisé, et d’observer la manière dont ils constituent un contexte littératié, notamment à partir de la distinction entre littératie restreinte et étendue. Pour cela, nous avons constitué un corpus d’observations de classe, en primaire et en collège. En effet, nos analyses montrent que le cadre de la scolarisation peut favoriser une insertion restreinte dans la littératie, ou bien aller dans le sens de la littératie étendue, notamment par la mise en œuvre, par l’enseignant ainsi que par les élèves, des potentialités cognitives liées à la culture écrite (à l’oral comme à l’écrit, d’ailleurs). Ces premiers résultats nous ont amenée à nous interroger sur le type d’insertion dans la littératie des enseignants eux-mêmes, d’autant plus que la majorité des enseignants actuellement en exercice au Brésil sont issus de familles peu ou pas scolarisées. A partir de l’analyse d’un deuxième corpus, constitué d’écrits produits en situation de formation, nous avons essayé de déterminer si leurs écrits témoignaient d’une insertion dans la littératie étendue. Nos analyses montrent que ces productions sont investies à partir de modalités d’écriture peu à même d’étayer l’actualisation de potentialités cognitives de l’écrit. Dès lors, du moment où certains enseignants sont peu littératiés, il semble peu probable qu’ils soient capables d’insérer les élèves dans la littératie étendue.
Entre éthique de l’intégration et pratiques de la différenciation : (re)penser l’organisation du travail scolaire ?
Authors: Maulini Olivier , Mugnier Cynthia
Published: September 2021

L'école obligatoire vise ou dit viser (et valoriser) l'intégration des élèves, mais elle a besoin pour cela de différencier leur prise en charge, au risque de séparer durablement les destins. Comment prévenir ce paradoxe ? Nous raisonnerons ici en trois temps. 1) En rappelant d’où vient l’organisation héritée du travail scolaire, et comment elle répartit les élèves dans des regroupements plus ou moins spécifiques en fonction de leurs besoins ou de leurs difficultés. 2) En montrant que l’histoire conditionne non seulement les pratiques pédagogiques, mais aussi les problèmes qu’elles ont le sentiment de rencontrer et qui peuvent les inciter à innover. 3) En résumant les résultats d’une recherche relative à l’organisation du travail scolaire dans les cycles d’apprentissage de l’école primaire : lorsque des équipes enseignantes choisissent de modifier – donc de repenser – les liens entre différenciation interne et différenciation externe des progressions, quelles sont les avancées envisagées, les conflits cognitifs qu’elles soulèvent, les ajustements qu’elles choisissent ou qu’elles sont contraintes d’opérer ?
Spécificité des dimensions temporelle et contextuellde l’aide spécialisée à dominante pédagogique
Authors: Pierrisnard Christine , Vannier Marie-Paule
Published: September 2021

La question de la spécificité de l’aide spécialisée à dominante pédagogique, au regard de l’aide apportée par l’enseignant de la classe ordinaire apparait de manière récurrente en formation ASH. Cette contribution discute la pertinence de deux hypothèses relatives aux dimensions des temporalités et des spatialités diversifiées. L’hypothèse contextuelle fait écho à une conception de l’activité humaine comme réponse adaptative des sujets aux situations particulières qu’ils rencontrent. Autrement dit, ce seraient les caractéristiques objectives de la situation d’aide, en termes de changement de lieu, de personne, de « cadre », d’effectif réduit, d’objet d’apprentissage négocié à partir de besoins reconnus et contractualisés, qui fonderaient les pratiques spécialisées. Confrontés aux traces filmées d’une pratique spécialisée, les professionnels reconnaissent la variable « effectif » comme élément contextuel déterminant. De toute évidence, la dimension temporelle de l’activité des élèves et/ou de l’enseignant est un des éléments déterminants du contexte. L’étude de l’hypothèse temporelle montre cependant que la spécificité d’une aide spécialisée ne se réduit pas à « donner du temps » ou à « prendre du temps » mais favorise chez l’élève la construction de nouvelles représentations temporelles pour penser ses apprentissages.
Uma análise interacional multimodal de expressões faciais em sequências de comunicação diagnóstica
Authors: Andrade Daniela Negraes Pinheiro
Published: September 2021

Este trabalho se propõe a investigar expressões faciais – movimentos coordenados envolvendo o arqueamento das sobrancelhas e o deslocamento da mandíbula para baixo (ASDMAN) – observadas em momentos em que médicos cardiologistas provêm informações diagnósticas para pacientes cardiopatas que estão recebendo alta hospitalar. As análises demonstram que as ASDMAN tornam público algum grau de alteração epistêmica do paciente acerca da cardiopatia, mas, além disso, demonstram orientação do paciente para a sequência de comunicação diagnóstica (SCOD) como ainda em progressão ou, de outra forma, terminada. A diferença de orientação depende de recursos interacionais mobilizados durante ou após a configuração da face conforme descrita. Amparado pelo arcabouço teórico-metodológico da Análise da Conversa Multimodal (Goodwin; Goodwin, 1982; 1984; Sacks, 1992; Schegloff, 2007, Mondada, 2014), o estudo baseia-se em interações de ocorrência naturalística gravadas em vídeo e transcritas (Jefferson, 1984; Mondada, 2019). Os dados analisados no estudo são originários de um corpus de 350 minutos de interação face a face entre profissionais de saúde e pacientes cardiopatas (25 atendimentos) em contexto de cuidados hospitalares em cardiologia no Brasil e que, de forma inédita, disponibiliza os corpos dos participantes para análise (Andrade, 2016). Espera-se que o trabalho contribua para a expansão do escopo analítico interacional multimodal envolvendo expressões faciais, de maneira especial, em interações em contexto de cuidados em saúde. Tem-se também a expectativa de que o trabalho colabore para a sensibilização de profissionais da saúde para recursos interacionais multimodais acionados por pacientes em contexto de SCOD e além. 
Palavras-chave: Comunicação médico-paciente; Cardiologia; Análise da Conversa Multimodal.
Presenting documents to clients in Social Work encounters
Authors: Monteiro David
Published: September 2021

In service encounters between social workers and clients, professionals introduce clients to specific bureaucratic procedures required by the institution and provide assistance in handling problems related to their institutional affairs. Here, paper-based documents are treated by the participants as relevant objects containing important textual information about clients’ rights and obligations, and duly presented by professionals to clients so to inform them of relevant matters at hand. Based on a corpus of video recordings of Social Work encounters in Portugal, and taking a multimodal conversation analytical approach, this study examines how social workers present paper documents to clients and how, through talk and bodily conduct, they ensure clients’ ability to inspect and make sense of relevant information, managing practical problems concerning clients’ access to documents and knowledge of the information contained therein.
Socio-Demographic Impacts on the Personal Savings Portfolio Choice
Authors: Buric Milijana Novovic , Raicevic Milan , Kascelan Ljiljana , Kascelan Vladimir
Published: September 2021

Insufficiently developed financial system, poor standard of living and inappropriate education of citizens on the saving products, lead to low level of investment in the financial market of developing countries. In this paper special attention is paid to examining the socio-demographic profile of Montenegrin citizens that invest their funds in some of the offered form of savings, as well as examining main factors that restrict their investment. For this purpose, data collected through the survey of Montenegrin citizens were processed using Decision Tree method. Survey results have shown that there is a low level of savings, as well as that citizens prefer deposits and life insurance products rather than pension plans and debt securities. Also, the results indicate that the main causes of the current state of savings in Montenegro are low standard of living, citizens´ poor awareness and the financial system which causes the insufficiently attractive supply of savings.
Applying Machine Learning to the Development of Prediction Models for Bank Deposit Subscription
Authors: Hou Sipu , Cai Zongzhen , Wu Jiming , Du Hongwei , Xie Peng
Published: September 2021

It is not easy for banks to sell their term-deposit products to new clients because many factors will affect customers’ purchasing decision and because banks may have difficulties to identify their target customers. To address this issue, we use different supervised machine learning algorithms to predict if a customer will subscribe a bank term deposit and then compare the performance of these prediction models. Specifically, the current paper employs these five algorithms: Naïve Bayes, Decision Tree, Random Forest, Support Vector Machine and Neural Network. This paper thus contributes to the artificial intelligence and Big Data field with an important evidence of the best performed model for predicting bank term deposit subscription.
The Impact of Data-Complexity and Team Characteristics on Performance in the Classification Model
Authors: Pungpapong Vitara , Kanawattanachai Prasert
Published: September 2021

This article investigates the impact of data-complexity and team-specific characteristics on machine learning competition scores. Data from five real-world binary classification competitions hosted on Kaggle.com were analyzed. The data-complexity characteristics were measured in four aspects including standard measures, sparsity measures, class imbalance measures, and feature-based measures. The results showed that the higher the level of the data-complexity characteristics was, the lower the predictive ability of the machine learning model was as well. Our empirical evidence revealed that the imbalance ratio of the target variable was the most important factor and exhibited a nonlinear relationship with the model’s predictive abilities. The imbalance ratio adversely affected the predictive performance when it reached a certain level. However, mixed results were found for the impact of team-specific characteristics measured by team size, team expertise, and the number of submissions on team performance. For high-performing teams, these factors had no impact on team score.
Management Problems in Global Crowdsourcing
Authors: Liu Zhijiang , Sakulyeva Tatyana , Mikheev Alexey , Stepanova Diana
Published: September 2021

The study aimed to develop recommendations for the optimization of settings in which the crowdsourcing project takes place. Findings show that crowdfunding projects are hybrid and include the elements of crowdsourcing, crowdsensing, crowdfunding, crowdworking, and crowdsourced recruitment. The predominant role of security guarantees was identified. It turned out that relations irreducible to a simple hierarchy pose many challenges. The results indicate that leading issues include the lack of financial guarantees and the likelihood of information leakage to competitors. Hence, the priority is to manage the exchange of money and information. An interesting finding demonstrates a positive correlation between project success, ethical conduct, and fair distribution of gains. The protection of intellectual property rights was no less important. As it was concluded in the course of analysis, the more successful the project, the more thoroughly it addresses the protection of someone else's intellectual property.
B2C E-Commerce Logistics Network Optimization Model
Authors: Zhang Xiaheng
Published: September 2021

In this paper, considering the characteristics of e-commerce logistics and the problems arising from the construction of logistics network, based on the full investigation and research of the B2C electricity supplier operation mode, we have studied and summarized the research results of scholars at home and abroad aiming at the related problems, and summarized and summarized the methods and steps of logistics network optimization in the whole country. First, we established the logistics network structure.The definition of network level, node function and connection between nodes is carried out. Then, through the improved urban agglomeration order gravity model, the scope of self logistics city is screened. Finally, the link of logistics network structure is scheduled for completion with the goal of cost optimization.
Improved Early-Age Cohesive Stress Response from Hybrid Blends of Micro and Macro Fibers
Authors: Bhogone Manjunath V. , Subramaniam Kolluru V.L.
Published: September 2021

The fracture response of macro polypropylene fiber reinforced concrete (PPFRC) and hybrid blend of macro and micro polypropylene fiber reinforced concrete (HyFRC) are evaluated at 1, 3, 7 and 28 days. There is an improvement in the early-age fracture response of HyFRC compared to PPFRC. The changing cohesive stress-crack separation relationship produced by ageing of the concrete matrix is determined from the fracture test responses. An improved early-age cohesive stress response is obtained from the hybrid blend containing micro and macro fibers. The hybrid fiber blend also has a higher tensile strength at early age when compared to an identical volume fraction of macro polypropylene fibers.
CFRP Laminates with Recycled Carbon Fiber: Resin Infusion and Mechanical Characterisation
Authors: David Francesco , Tagliaferri Vincenzo , Trovalusci Federica
Published: September 2021

The possibility to produce new components using reclaimed non-woven carbon fabric has been investigated. Being composite waste production increased, different strategies and technologies for recycling are developing to face criticalities and economic aspects related to their disposal. In this scenario, CFRP laminates with recycled carbon fiber and epoxy vinyl ester resin have been fabricated by Resin Infusion under Flexible Tooling (RIFT) and mechanical characterization has been performed to investigate their behavior under tensile, flexural and macro-indentation loads.
Experimental Investigation of Thermal Conductivity from Insulation Based on Rice Hulks: Guarded and Calibrated Hot Box Method
Authors: Frómeta Yokasta García , Rivera Francisco Ramírez , Holguín Víctor González , Cuadrado Jesús
Published: September 2021

In developing countries, large quantities of agricultural residues associated with harvests are generated, given that agriculture is one of the most important economic activities. The valorization of these residues for the construction sector could contribute to the improvement of energy efficiency in buildings. Through passive techniques, the construction of insulating thermal-acoustics panels, blocks, and aggregate for reinforced concrete can improve the energy efficiency. In this study, an experiment was performed to measure thermal conductivity of the Agricultural-Thermal Insulation Panel (ATIP) based on rice hulks. These Agricultural-Thermal Insulation Panels were elaborated follow a standard process to compaction of the rice hulks to be employed as insulation material with a panel dimension of 200x200x34.5(mm3). A “Hot Box” configuration was used to obtain the thermal conductivity of the panels, using different temperature gradients between hot and cold chambers.
NH4OH- KOH Pulping and Single-Stage Bleaching Processes of Banana Pseudostem Waste: A Feasibility Study for Molded Pulp Packaging Use
Authors: Kunfong Nutchanad , Rattanawongkun Phattharasaya , Tawichai Nattaya , Intatha Uraiwan , Soykeabkaew Nattakan
Published: September 2021

The NH4OH-KOH pulping was a highly efficient process for extracting banana pseudostem waste (BNW) pulp. Besides, this greener pulping process allowed NH4OH recovery and KOH can be later used as fertilizer, reducing the environmental impact. It was found that the optimal BNW pulping condition was using 8.3 wt% NH4OH and 3.3 wt% KOH at a cooking temperature of 155°C for 1 h, and liquid to solid ratio 6:1. From the results, this process allowed low chemical usage and provided high pulp yield (44%) with a high delignification degree (80%) and low Kappa no. (22). After pulping, the single-stage bleaching of BNW pulp using 8 wt% H2O2 and 1.5 wt% NaOH at 90°C for 1 h was shown to improve the whiteness and brightness of the BNW molded pulp samples to 69.7% and 28.7%ISO (3-fold increase), respectively. As compared to commercial molded pulp food packaging, the present BNW molded pulp exhibited a superior tensile index of 54.3 Nm/g and Young’s modulus of 4.8 GPa.
An Exploratory Study of the Cutting-Edge Development of Nanotechnology Pertaining to the Construction Industry
Authors: Cook Laetitia , Wantenaar Cameron , Wise Bronwyn
Published: September 2021

This paper explores how the application of nanotechnology can enhance the efficacy of construction materials, decrease consumption and cost of materials, whilst further increasing sustainability in the South African construction industry. Nanotechnology controls matter at an atomic level. At this level the properties of matter are manipulated and severely affected with potentially significant benefits to the construction industry. This exploratory desktop study examined relevant scientific literature through thematic content analysis and the uses of NanoSilica, Carbon Nanotubes, Titanium Dioxide, Zinc Oxide, Nanosilver, and Copper Nanoparticles were extracted and discussed.
Program Directors' and Athletic Training Students' Educational Experiences Regarding Patient-Centered Care and Transgender Patient Care
Authors: Shaughnessy Gillian T. , Crossway Ashley K. , Eberman Lindsey E. , Rogers Sean M. , Winkelmann Zachary K.
Published: September 2021

Context

The United States transgender patient population often suffers from insufficient health care and faces barriers to obtaining health care. Understanding the current classroom education provided in professional athletic training programs related to patient-centered and transgender patient care is necessary to foster improvements to the education of future health care providers.

Objective

To explore the education, comfort, and experience of professional athletic training students and program directors (PDs) on patient-centered care (PCC) and transgender patient care.

Design

Cross-sectional survey.

Setting

Online survey.

Patients or Other Participants

A total of 74 PDs of Commission on Accreditation of Athletic Training Education-accredited professional athletic training programs (age = 46 ± 9 years) and 452 athletic training students (age = 23 ± 3 years) responded to the survey.

Data Collection and Analysis

Two surveys were created from literature and were reviewed by a committee of content experts. Participants were sent links to their respective survey in March 2020. Surveys contained questions on demographic information, PCC, and transgender patient care. Data were analyzed descriptively with follow-up χ2 analyses comparing athletic training students' comfort and competence between those who learned and did not learn about transgender patient care.

Results

Most PDs reportedly felt comfortable (98.6%, n = 73) and competent (94.6%, n = 70) teaching PCC. Half (50% n = 37/74) of PDs include transgender health care in their program's curriculum but lacked competence (37.8%, n = 28) in teaching. All students felt comfortable (100%, n = 452) and competent (98.7%, n = 446) practicing PCC, but only 12.4% (n = 54) reported practicing it during clinical education. Less than half (43.1%, n = 195/452) of students learned about transgender patient care, yet most (78.3%, n = 354) felt comfortable but lacked competence (41.8% n = 189).

Conclusions

Few students reportedly practice PCC during clinical education. Both groups perceived deficiencies in competence related to transgender patient care. We suggest PDs teach transgender health care in their curriculum and seek professional development to create meaningful educational experiences.
Prognostication Based on Texture Analysis of Baseline 18F Fluorodeoxyglucose Positron Emission Tomography/Computed Tomography in Nonsmall-Cell Lung Carcinoma Patients Who Underwent Platinum-Based Chemotherapy as First-Line Treatment
Authors: Sharma Akshima , Pandey Anil Kumar , Sharma Anshul , Arora Geetanjali , Mohan Anant , Bhalla Ashu Seith , Gupta Lalit , Biswal Shiba Kalyan , Kumar Rakesh
Published: September 2021

Objective:

Our study aims to establish the potential for tumor heterogeneity evaluated using 18F fluorodeoxyglucose positron emission tomography/computed tomography (F-18 FDG PET/CT) texture analysis in nonsmall-cell lung carcinoma (NSCLC) patients who underwent platinum-based chemotherapy to provide an independent marker for overall survival (OS) of more than 1-year.

Materials and Methods:

A total of 42 patients (34 male and 8 female) with biopsy-proven NSCLC and mean age 55.33 ± 10.71 years who underwent a baseline F-18 FDG PET/CT and received platinum-based chemotherapy as first-line treatment were retrospectively included in the study. Ten first order, 21 s order texture parameters and 7 SUV and metabolic tumor volume (MTV) based metabolic parameters were calculated. All these parameters were compared between the two survival groups based on OS ≥1 year and OS <1 year. Cut-offs of significant parameters were determined using receiver operating characteristic curve analysis. Survival patterns were compared by log-rank test and presented using Kaplan-Meier curves. Cox proportion hazard model was used to determine the independent prognostic marker for 1 year OS.

Results:

In univariate survival analysis, 3 first order texture parameters (i.e. mean, median, root mean square with hazard ratios [HRs] 2.509 [P = 0.034], 2.590 [P = 0.05], 2.509 [P = 0.034], respectively) and 6 s order texture parameters (i.e. mean, auto correlation, cluster prominence, cluster shade, sum average and sum variance with HRs 2.509 [P = 0.034], 2.509 [P = 0.034], 3.929 [0.007], 2.903 [0.018], 2.954 [0.016] and 2.906 [0.014], respectively) were significantly associated with 1 year OS in these patients. Among the metabolic parameters, only metabolic tumor volume whole-body was significantly associated with 1 year OS. In multivariate survival analysis, cluster prominence came out as the independent predictor of 1 year OS.

Conclusion:

Texture analysis based on F-18 FDG PET/CT is potentially beneficial in the prediction of OS ≥1 year in NSCLC patients undergoing platinum-based chemotherapy as first-line treatment. Thus, can be used to stratify the patients which will not be benefitted with platinum-based chemotherapy and essentially needs to undergo some other therapy option.
Dural Metastasis in Spinal Canal Diagnosed on F-18 Fluorodeoxyglucose Positron Emission Tomography Contrast-Enhanced Computed Tomography Scan in Treated Case of Osteogenic Sarcoma of the Left Femur
Authors: Gosavi Atul Yashwant , Puranik Ameya , Agrawal Archi , Purandare Nilendu , Shah Sneha
Published: September 2021

We describe a rare case of osteogenic sarcoma of the right femur; who 2 years after the treatment of primary site developed dural metastasis. Surveillance imaging for unusual pattern of metastasis may lead to earlier detection and treatment decision-making, which may improve survival and quality of life.
Fluorine-18 Fluorodeoxyglucose Positron Emission Tomography/Computed Tomography in Hodgkin's Lymphoma
Authors: Usmani Sharjeel , Al-Ramadhan Fatma , Al-Kandari Fareeda , Ahmed Najeeb
Published: September 2021

Benign metabolic uptake on fluorine-18 fluorodeoxyglucose positron emission tomography (18F-FDG PET) is not uncommonly seen after immunization. We report a case of 30-year-old man with Hodgkin's lymphoma who underwent two cycles of chemotherapy. Interim 18F-FDG PET/computed tomography demonstrated complete metabolic response of prior hypermetabolic bilateral supraclavicular and mediastinal lymph nodes. Although multiple new normal-sized hypermetabolic left axillary and subpectoral lymph nodes are noted, relevant history revealed COVID vaccine 7 days prior scan with mild FDG uptake at the left deltoid muscle. These new findings at the left axilla are likely related to recent vaccination. 18F-FDG PET uptake in the lymph nodes is not so uncommon after immunization; relevant history is very important especially in the phase of massive immunization to avoid false interpretation.
Variation of the Superior Articular facet of Atlas and Their Significance
Authors: Goyal Neeru , Jain Anjali
Published: September 2021

Introduction:

Atlas helps in complex biomechanical movements of the skull along with weight transmission of skull to spine. Recent developments in fixation technologies and minimally invasive surgical approaches have encouraged further studies of the region. Objectives of this study are to explore the shape, size, and symmetry of the superior articular facet of atlas. Good knowledge of the variations of the facet is important for orthopedicians, physiotherapists, and neurosurgeons.

Material and Methods:

The study was conducted on 110 dried adult atlas vertebrae. Shape, size, and number of the superior articular facets on each atlas were recorded.

Results:

Different shapes observed were kidney-shaped, oval-shaped, irregular, rectangular, comma-shaped, sinuous, sole/8-shaped, and two/three separate facets. Length and width of the facet were similar on two sides. In 31.82% of cases, the facets on the two sides were not symmetrical. Discussion and

Conclusion:

Variations of the superior articular facets have been extensively described. While planning treatment plans in cases of craniovertebral joint dysfunction, morphology and variations of the region should be kept in mind.
Bilateral Persistent Primitive Olfactory Artery Incidentally Detected by Computed Tomography Angiography and Digital Subtraction Angiography
Authors: Mahajan Anshu , Chatterjee Apratim , Goel Gaurav
Published: September 2021

We present a rare case of bilateral persistent primitive olfactory artery incidentally detected on computed tomography angiography and digital subtraction angiography in a 53-year-old female with symptomatic left-sided tight internal carotid artery stenosis. This imaging finding can be useful to the literature.
A Rare Case of Anomalous Origin of Bilateral Testicular Arteries
Authors: Ganapathy Arthi , Banerjee Aritra , Jhajhria Saroj Kaler , Singh Seema
Published: September 2021

An extensive knowledge of the origin and course of testicular arteries (TAs) is indispensable during various surgical procedures such as renal transplant, intra-abdominal surgeries, and even in orthopedic surgeries such as spine surgery. With the advent of new intra-abdominal therapeutic and diagnostic techniques, the anatomy of TAs has assumed much more significance. Although the variations of the testicular vein are well documented, the variations of the TA are not so frequent in incidence. We report a rare case of bilateral aberrant origin of the TA from polar renal arteries. Though anomalies of the polar arteries supplying the kidney are common, bilateral origin of TAs from them is a rare presentation. We also discuss its developmental basis. Such anomalies if left unnoticed will lead to serious intraoperative complications during procedures on retroperitoneal organs. Any damage to the TAs will compromise the function of the gonads.