bluuebunny/crossref_metadata_2025 huggingface dataset:
Multicolor Optical Monitoring of the Blazar S5 0716+714 from 2017 to 2019
Authors: Xiong Dingrong , Bai Jinming , Fan Junhui , Yan Dahai , Gu Minfeng , Fan Xuliang , Mao Jirong , Ding Nan , Xue Rui , Yi Weimin
Published: March 2020

We continuously monitored the blazar S5 0716+714 in the optical g, r, and i bands from 2017 November 10 to 2019 June 6. The total number of observations is 201 nights including 26,973 data points. This is a very large quasi-simultaneous multicolor sample for the blazar. The average time spans and time resolutions are 3.4 hr and 2.9 minutes per night, respectively. During the period of observations, the target source in the r band brightens from 14.ͫ16 to 12.ͫ29 together with five prominent subflares, and then becomes fainter to 14.ͫ76, and again brightens to 12.ͫ94 with seven prominent subflares. For the long-term variations, we find a strong flatter-when-brighter (FWB) trend at a low-flux state and then a weak FWB trend at a higher-flux state. A weak FWB trend at a low-flux state and then a strong FWB trend at a higher-flux state are also reported. Most subflares show strong FWB trends, except for two flares with a weak FWB trend. The particle acceleration and cooling mechanisms together with the superposition of the different FWB slopes from the subflares likely explain the optical color behaviors. A scenario of bent jet is discussed.
Genital Secretion HIV RNA Shedding in HIV-Positive Patients on Ritonavir-Boosted Protease Inhibitor Monotherapy or Standard Combination ART: A Cross-Sectional Sub-Study from the PIVOT Trial
Authors: Arenas-Pinto Alejandro , Stöhr Wolfgang , Khoo Saye , Clarke Amanda , Beeching Nicholas , Warwick Zoe , Lee Vincent , Else Laura , Wiggins Rebecca , Ferns Bridget , Nastouli Eleni , Dunn David , Lacey Charles J , Paton Nicholas I ,   the Protease Inhibitor monotherapy Versus Ongoing Triple therapy (PIVOT) Genital Secretion sub-study Team
Published: March 2020

Background

Protease inhibitors (PI) have relatively low penetration into the genital tract, raising concerns about the potential for genital HIV RNA shedding in patients taking PI-based regimens, particularly PI monotherapy (PI-mono).

Methods

We measured HIV RNA and PI drug concentrations in samples of semen, cervicovaginal and rectal mucosa secretions, and plasma in patients after 48–96 weeks on PI-mono or standard triple therapy.

Results

A total of 85 participants were recruited. Of the 43 participants on PI-mono (70% on darunavir [DRV]/ ritonavir [r]), 3 had detectable virus in semen or vaginal secretions (all below quantification limit), and none in rectal mucosa or plasma. Among those taking triple therapy, five had detectable virus in semen or vaginal secretions (HIV RNA >50 copies/ml in one), none in rectal mucosa and one in plasma. The median (IQR) concentration of DRV and atazanavir in semen (659.7 [339–1,089] and 128.8 [63–368] ng/ml, respectively) and cervico-vaginal samples (2,768 [312–7,879] and 1,836 [359–3,314] ng/ml, respectively) exceeded their protein adjusted median inhibition concentration (MIC50). DRV concentration in rectal secretions showed higher variability compared with concentration in the other sites, with particularly high rectal secretion/blood ratios (median 8.4, IQR 2.6–68.7:1).

Conclusions

We found no substantive evidence of HIV shedding in patients taking PI-mono, suggesting that PIs provide adequate control of virus in the genital compartment and are unlikely to lead to ongoing sexual transmission.
Le paradigme clinique du jeu : son évaluation et sa modélisation dans le champ des psychothérapies psychanalytiques
Authors: Rabeyron Thomas
Published: March 2020

Le jeu est l’un des grands organisateurs de la vie psychique, qui participe aussi bien de son développement que de sa créativité. Il sera, par conséquent, fréquemment utilisé au sein de l’espace psychothérapique et mérite un intérêt particulier de la part des cliniciens. Dans cette perspective, nous proposons dans ce travail une étude synthétique des principes qui orientent les jeux à symbolisation et leurs effets dans le champ des psychothérapies psychanalytiques. Quelques éléments transdisciplinaires, issus de l’anthropologie et des neurosciences cognitives, introduisent des hypothèses relatives aux fonctions du jeu dans la psyché humaine. Plusieurs opérateurs du jeu (le corporel, le double, la transmodalité, le plaisir et l’aléatoire) sont dégagés comme tentatives de modélisation des processus qui caractérisent le jeu. Enfin, plusieurs pistes de réflexion sont proposées pour de futures recherches qui pourraient aider à mieux saisir comment le jeu favorise la relance du processus de symbolisation et de transformation psychiques.
Entre narration et narrativité : récits de rêves et travail du rêver
Authors: Joly Fabien
Published: March 2020

L’irréductible écart entre « récits de rêves » et « travail du rêver », entre le rêve raconté et le rêve rêvé apparaît comme un laboratoire singulier pour repérer et comprendre les deux registres de la narrativité et de la narration : leurs écarts autant que leurs articulations au sein d’un processus permanent de symbolisation et de subjectivation, au creux duquel les logiques de l’Inconscient se jouent, se nouent et se dialectisent. Hors du processus du rêve, il est proposé d’exporter cette dialectique « entre narration et narrativité » dans d’autres secteurs de la vie psychique ou de la thérapeutique.
La médiation scolaire transculturelle : un outil d’inclusion
Authors: Lerin Talia
Published: March 2020

Les enquêtes internationales montrent des inégalités persistantes entre les élèves autochtones et les élèves enfants de migrants dans le système scolaire français. Ce constat met en évidence la nécessité de mettre en place des dispositifs spécifiques pour mieux aider ces élèves dans le but de promouvoir l’égalité des chances et la réussite de tous à l’école, en vertu du principe d’inclusivité scolaire. Dans cet article nous décrirons un dispositif novateur dans les domaines de la prévention et de l’inclusion scolaire, à savoir la médiation scolaire transculturelle. Elle s’inspire de l’approche transculturelle au service de l’école et du cadre de la médiation transculturelle. Notre recherche sur l’impact de la médiation scolaire transculturelle montre que ce dispositif constitue un outil d’inclusion scolaire particulièrement adapté, mais non exclusivement réservé aux élèves enfant de migrants qui présentent des difficultés d’inclusion à l’école.
Savoirs, pouvoir et imagination
Authors: Giacobi Carole , Bouznah Serge , Moro Marie Rose
Published: March 2020

La médiation transculturelle hospitalière est un dispositif sollicité au détour de difficultés rencontrées entre le patient et l’équipe soignante pour élaborer un projet de soins commun et partagé, difficultés identifiées comme étant en lien avec des malentendus culturels. Nous proposons qu’au-delà du travail d’explicitation et de conciliation qu’il propose, ce dispositif possède un second niveau d’action plus implicite et directement lié à la question du binôme médiateur culturel – médecin animateur. Cet article original est le fruit d’une réflexion personnelle enrichie d’une revue de littérature non exhaustive sur la médiation transculturelle mais aussi les rapports entre pouvoir et savoir au sein de l’institution hospitalière. Nous verrons en quoi l’illustration d’une synergie entre savoir profane et savoir expert par le binôme permet de restaurer la parole du patient et lui redonner une place centrale dans un projet de soins accepté par les deux parties.
Former au travail avec interprète de service public et à la médiation interculturelle
Authors: Leanza Yvan , Angele Rebecca , René de Cotret François , Bouznah Serge , Larchanché Stéphanie
Published: March 2020

Le travail avec l’interprète de service public est complexe et les formations à ce niveau, relativement rares. Le diplôme universitaire (DU) Pratiques de médiation et de traduction en situation transculturelle est une formation continue offerte conjointement à des intervenants de différents champs (médical, social, éducatif) et à des interprètes. Le projet de recherche présenté ici a comme objectif d’explorer les effets de la formation sur la collaboration entre intervenant et interprète, en particulier autour des enjeux de pouvoir, de contrôle et de confiance. Trente-deux participants au DU (24 intervenants et 8 interprètes) ont répondu à un questionnaire sociodémographique, puis participé à des entrevues de groupe. La grande majorité a une expérience à la fois professionnelle et personnelle des diversités, voire du métissage. Notamment par la réflexion personnelle et le travail collaboratif qu’elle suscite, la formation favorise un sentiment de légitimité de ces diversités. Cela a vraisemblablement une influence positive sur la relation entre les intervenants et les interprètes ainsi que sur l’emploi de la médiation et même sur la mise sur pieds de projets extraprofessionnels, dans la communauté. Malgré les changements observés, les interprètes restent aux prises avec un manque de reconnaissance de la part des institutions.
Pratiques langagières et éducatives dans des familles plurilingues de Polynésie française
Authors: Ailincai Rodica , Sramski Sandra
Published: March 2020

Cet article présente les résultats d’une recherche expérimentale s’intéressant aux pratiques éducatives et discursives des parents d’enfants âgés de 9 à 11 ans, vivant en Polynésie française, dans l’archipel des Australes. Douze parents ont été observés dans deux activités distinctes d’environ quinze minutes chacune. Les enregistrements ont été transcrits et analysés du point de vue de la variabilité interactive (l’étude des styles interactifs, le type d’échanges, les concepts abordés et le langage employé) et de l’alternance codique pratiquée (inter/intra-phrase, inter/intra-locuteur, orale/écrite et traductive). Les résultats ont mis en évidence la présence des nombreux échanges étendus qui témoignent de l’intérêt conjoint des locuteurs pour l’activité, de pratiques d’accompagnement directives et suggestives, de l’utilisation par les parents d’un langage en situation, peu facilitateur pour le rendu évaluatif ultérieur, et d’une alternance codique cursive et opérationnelle pour la majorité des dyades.
Dérive de la rêverie et subversion du roman dans Miracle de la rose de Jean Genet
Authors: Gibelli Dario
Published: March 2020

Dans Miracle de la rose , Genet alterne le récit de son enfermement à la Centrale de Fontevrault avec les souvenirs de son séjour à la Colonie pénitentiaire de Mettray. Prétendument autobiographique, le cadre fontévriste du récit présente une série de contradictions portant sur l’énonciation et sur l’énoncé (structure paradoxale de l’instance narrative, flottements chronologiques, versions alternatives des mêmes épisodes) qui enfreignent les codes traditionnels du genre (autobiographique ou romanesque) et témoignent d’une relance capricieuse de l’invention qui fait de la rêverie et de la fuite dans l’imaginaire, inlassablement thématisés et illustrés, le véritable moteur de l’œuvre.
Espoirs et désillusions du développement minier en contexte post-conflit. Un exemple congolais
Authors: Joncheray Mathilde
Published: March 2020

Suite à la décennie de guerres des années 1990, et sous l’injonction des institutions internationales, la République du Congo a réalisé un nouveau code minier. Le secteur a été ainsi profondément reconfiguré, de grands conglomérats internationaux remplaçant les petites sociétés d’extraction étrangères, suscitant l’espoir de retombées rapides pour le développement du pays. Alors que l’imposition de plus en plus fréquente de règles de contenu local pourraient laisser présager d’un possible développement des territoires, l’absence de reconstruction, le manque d’infrastructures et de formations professionnelles adaptées au secteur minier constituent autant de freins à l’activité minière au Congo, provocant autant de désillusions. Classification JEL : F23, L72, N57, O13, O55
Quelles relations entre management des risques industriels et RSE ?
Authors: Bou Nader Raymond , van Hoorebeke Delphine
Published: March 2020

Notre article consiste à étudier la pratique actuelle de la RSE dans le contexte des compagnies libanaises à caractère industriel, et à examiner la relation entre les pratiques RSE d’une part et le management des risques d’autre part, en utilisant des techniques de statistique. C’est dans ce dernier cas que la contribution principale de cet article a été réalisée. Ainsi, cette recherche a permis de percevoir la RSE comme étant plus qu’un simple outil de marketing et de relations publiques mais aussi un vrai outil influant le risque dans les entreprises. Notre recherche met l’accent sur le management et les pratiques de l’entreprise en termes de gestion du risque, afin de mieux gérer par la RSE les impacts sociaux, environnementaux, et communautaires de leurs activités.
Entrepreneurship orientation and innovation linkage: the case of Moroccan firms
Authors: Majdouline Ilias , El Baz Jamal , Jebli Fedwa
Published: March 2020

Plusieurs recherches ont examiné comment les entrepreneurs détectent et exploitent les opportunités (e.g. Baron, 2008; Ucbasaran et al. , 2010) et comment l’innovation influence leurs entreprises (e.g. Ireland et al. , 2003; Kuratko et Audretsch, 2009). Cependant, la recherche empirique s’est focalisée en grande partie sur le contexte des pays avancés ou émergents et peu de recherches ont ciblé les pays en développement. En particulier, la recherche sur l’innovation entrepreneuriale dans les pays africains est en émergence. En prenant le Maroc comme terrain d’étude, le but de cette recherche est d’analyser comment les entrepreneurs marocains déploient l’innovation dans leurs activités entrepreneuriales. Notre démarche empirique est basée sur une approche qualitative à travers des entretiens avec des entrepreneurs marocains afin de cerner la thématique de l’orientation entrepreneuriale et sa relation avec l’innovation. L’analyse des cas d’entrepreneurs met en évidence différentes attitudes et approches de l’innovation entrepreneuriale des entreprises au Maroc. Sur la base des résultats obtenus, nous présenterons une discussion de leurs implications ainsi qu’un modèle conceptuel proposé et nous discuterons également les limites issues de notre recherche.
Le témoin et son autre
Authors: Dayan Rosenman Anny
Published: March 2020

On est toujours deux dans un témoignage. Et peu de textes requièrent avec la même urgence l’écoute, la présence physique ou symbolique de l’autre, contemporain, auditeur ou lecteur, qui est aussi le représentant de l’autre humain qui fit défaut au moment de l’épreuve. D’où la nécessité de renouer le lien que Primo Levi traduit par l’interpellation, l’adresse, et le dialogue avec son lecteur, tandis que Claude Lanzmann, dans Shoah , incarne une instance d’écoute active et médiatrice qui sert d’étayage à la parole du témoin et lui permet parfois d’advenir. Dans le cadre d’une mort de masse et d’une non-séparation, le survivant semble accueillir en lui l’englouti ou poursuivre un dialogue avec ses morts. Dans certains témoignages, entre symptômes et thèmes littéraires, les phénomènes d’incorporation, les reflets spéculaires, la présence de doubles, apparaissent comme la traduction dans l’écriture d’un deuil impossible. Pourtant, c’est aussi parfois dans et par l’écriture que le témoin-survivant peut se séparer de ses morts.
ARTICLE RETIRÉ : Le goût de l’autre
Authors: Jourdan-Peyrony Jessica , Servant Benoît
Published: March 2020

Les auteurs proposent une réflexion théorico-clinique sur la place de la relation duelle dans la psychopathologie et le soin des patients en souffrance narcissique-identitaire, à partir de leur expérience en hôpital de jour soins études. Alors que la relation duelle est souvent considérée avec suspicion, le cadre institutionnel devant permettre la tiercéisation censée faire défaut, la première semble être un temps nécessaire incontournable du processus thérapeutique, ce que l’on peut rapprocher des conceptualisations du transfert dans ses deux temps de sexualisation et désexualisation. Les auteurs repèrent ainsi trois temps nécessaires dans l’évolution de leurs jeunes patients : surinvestissement d’un des objets de l’environnement ou du cadre idéalisé, déception et attaque de cet objet, dégagement de ce lien négatif et introjection d’une partie du travail élaboratif de l’équipe soignante. Cette réflexion est illustrée de nombreuses vignettes cliniques de ces différents temps.
Du concrétisme à la métaphore. Sur quelques aspects théoriques et techniques de travail psychanalytique avec des descendants de survivants à l’Holocauste
Authors: Grubrich-Simitis Ilse
Published: March 2020

Au début des années 1960 commença le travail analytique avec les descendants des survivants des camps de concentration. L’auteure attire ici l’attention sur une caractéristique du fonctionnement du moi de ces patients dont les parents avaient dû d’abord exister face à la menace permanente de la mort, puis dénier leurs expériences traumatiques. L’altération de la capacité de métaphorisation dans ces conditions extrêmes se retrouve aussi chez les descendants de survivants. Ils considèrent ce qu’ils ont à dire comme des choses concrètes, et non comme étant remémoré ou fantasmé. De ce fait, leur expression est factuelle. L’objectif thérapeutique est alors de surmonter le concrétisme et de restaurer la capacité métaphorique. Pour ce faire, l’analyste doit surmonter le pacte de silence instauré dans la famille, et établir avec son patient la réalité de ce qui s’est passé. La « phase d’acceptation commune de la réalité de l’Holocauste » apparaît comme une étape indispensable à la restauration de la capacité métaphorique de la pensée et du langage, étape qui engage profondément les deux protagonistes dans un véritable travail de deuil.
Le premier pas résume la danse
Authors: Maes Jean-Claude
Published: March 2020

Certaines rencontres font basculer la vie pour un mieux ou pour un pire. Jean-Claude Maes essaiera de montrer que la posture relationnelle de la rencontre définit un destin schismogénétique dont on ne peut changer le cours qu’en transformant les phases de crise en renouvellement de la rencontre.
Corneal Biomechanical Properties in Childhood Obesity
Authors: Can Mehmet Erol , Kızıltoprak Hasan , Buluş Ayşe Derya , Özkoyuncu Dilara , Koç Mustafa , Özdemir Yıldız Zennure
Published: March 2020

Purpose:

To investigate corneal biomechanical properties in patients with childhood obesity.

Methods:

The study included 47 patients with childhood obesity (study group) and 39 healthy patients (control group). Corneal hysteresis, corneal resistance factor, corneal compensated intraocular pressure (IOPcc), and Goldmann-correlated IOP (IOPg) were measured with the Ocular Response Analyzer (Reichert, Ophthalmic Instruments, Buffalo, NY) in each eye. Central corneal thickness (CCT), anterior chamber angle (ACA), anterior chamber volume (ACV), and anterior chamber depth (ACD) measurements were obtained by the Pentacam rotating Scheimpflug camera (Oculus Optikgeräte GmBh, Wetzlar, Germany).

Results:

The mean corneal hysteresis was 10.56 ± 1.52 mm Hg in the study group and 11.16 ± 1.92 mm Hg in the control group (
P
= .022). The mean IOP was 14.9 ± 2.0 mm Hg in the study group and 14.1 ± 1.3 mm Hg in the control group (
P
= .003). Corneal hysteresis showed a significant, positive correlation with corneal resistance factor (
P
< .001,
r
= 0.851), IOPg (
P
= .044,
r
= 0.213), CCT (
P
< .001,
r
= 0.477), and IOP (
P
= .005,
r
= 0.295). Corneal hysteresis showed a significant, negative correlation with IOPcc (
P
= .001,
r
= −0.355), ACA (
P
= .005,
r
= −0.294), ACV (
P
= .019,
r
= −0.246), and ACD (
P
= .046,
r
= −0.211).

Conclusions:

Patients with childhood obesity have lower corneal hysteresis and higher IOPcc measurements when compared with healthy patients. Corneal tissue changes may occur in early life in childhood obesity, which could lead to ocular disease in the future.

[
J Pediatr Ophthalmol Strabismus
. 2020;57(2):103–107.]
A escrita geográfica do tempo: tradução e circulação, texto e imagem, geografia humana e geografia histórica a partir de Henry Clifford Darby (1909-1992)
Authors: Ribeiro Guilherme , Neto João Alves de Souza
Published: March 2020

Ao traduzir pela primeira vez em língua portuguesa dois artigos do britânico H.C. Darby — On the relations of geography and history (1953) e The problem of geographical description (1962) —, o intuito dessa apresentação é o de apontar sua contribuição metodológica para a geografia histórica sobre temas como a descrição e a temporalidade das paisagens e as relações entre texto e imagem. Entretanto, com vistas a desnaturalizar a chegada de mais um artigo estrangeiro ao Brasil, promovemos conjuntamente uma reflexão sobre os papéis assumidos pela tradução no que se refere ao ensino de história da geografia em um país e uma língua periféricos. Em termos metodológicos, o campo dos translations studies nos permite interrogar a circulação científica vigente e seu conteúdo político.
Expansão do agronegócio canavieiro no sul goiano e os efeitos na produção de alimento
Authors: Neves Pedro Dias Mangolini , Mendonça Marcelo Rodrigues
Published: March 2020

A região Sul de Goiás vem desde o século XXI se transformando em uma das áreas com maior expansão de área cultivada e produção de cana-de-açúcar a partir de uma modificação estratégica do capital do agronegócio canavieiro com anuência do Estado. Desta forma, compreender as dinâmicas deste território que favorecem a expansão da agroindústria canavieira através de programas e políticas públicas, condições edafoclimáticas, disponibilidade hídrica, solos férteis, considerando o mapeamento proposto pelo Zoneamento Agroecológico da cana-de-açúcar (MANZATTO et al., 2009) corresponde ao objetivo desta pesquisa. Além disso, pretende-se demonstrar que está havendo a diminuição da produção de alimento principalmente de arroz, mandioca, trigo e da produção leiteira no Sul Goiano concomitantemente com a expansão do agronegócio canavieiro. Esta pesquisa aponta para uma contradição existe na literatura da área que consideram a expansão da cana-de-açúcar no Sul Goiano como resultante da retração da produção de monocultivos como a soja e o milho e da produção da pecuária. Neste ínterim, considera-se que o Estado deve intervir na produção de alimentos assim como intervém na produção de commodities com financiamentos, incentivos fiscais, construção de infraestrutura e protecionismo, para que exista soberania e segurança alimentar.
A produção do urbano e do imobiliário na região metropolitana de Belém
Authors: Mendes Luiz Augusto Soares
Published: March 2020

Este artigo trata da dinâmica urbano-imobiliária que produz a Região Metropolitana de Belém no Estado do Pará (RMB) assumindo diversas frentes de expansão. Busca-se entender o fechamento da fronteira urbano imobiliária de um lado do espaço metropolitano, em Belém; e a sua expansão do outro - nas demais cidades que compõem a região. Apresenta-se as diversas ações imobiliárias e a espacialização dos seus diversos produtos, buscando mostrar as suas relações com as cidades que compõem a RMB e a expansão de um setor imobiliário que se estrutura de maneira diversa. Essa espacialização é resultado das observações in loco, de análise documental em jornais, entrevista, aplicação de questionários e formulários. Ações metodológicas que culminaram de uma análise minuciosa das realidades urbanas, em que se identificou a extensificação e a dispersão urbana de um lado, bem como a intensificação e concentração do urbano do outro lado.
Contribuições da cartografia temática como instrumento analítico em estudos históricos.
Authors: Beier José Rogério , Rabelo Lucas Montalvão
Published: March 2020

O objetivo deste trabalho é destacar o potencial contributivo da Cartografia Temática aos estudos históricos como instrumento analítico das fontes levantadas no curso de uma investigação. Para tanto, se iniciará o artigo com uma breve introdução acerca da Cartografia Temática e seus principais aspectos metodológicos, para, em seguida, se apresentarem dois exemplos de seu uso em investigações acadêmicas no campo da História. Busca-se, com isso, chamar atenção para alguns elementos relevantes desta ferramenta que podem servir ao historiador no levantamento de novos problemas para sua investigação; na análise dos problemas já levantados e, principalmente, na construção da argumentação de sua narrativa. Ao fim, pretende-se apontar para a importância do emprego desse instrumento nos estudos históricos, desde que seu uso esteja associado às questões e aos problemas da pesquisa, e não meramente por fins estéticos ou tecnicistas.
Uma discussão sobre o uso dos conceitos de processos (e formas) espaciais nas cidades brasileiras
Authors: Vasconcelos Pedro de Almeida
Published: March 2020

O texto trata da discussão sobre o uso dos conceitos e formas espaciais nas cidades brasileiras e é dividido em duas partes. A primeira parte trata das origens do conceito de segregação, oriundo de outros contextos espaciais e temporais; da aplicação geral do referido conceito e da sua aplicação específica nas cidades brasileiras, como Salvador. Na segunda parte são comentados vários processos (e formas) espaciais que são confundidos com o conceito de segregação, tanto no senso comum como na Academia. O texto é concluído com a crítica da aplicação automática do conceito de segregação às cidades brasileiras, com destaque para Salvador, e com a indicação de outros processos que ocorrem nas referidas cidades.
New Approach for Multiplying the Strength and the Formability of Cold Rolled BCC Based Structure Steel through Ultra Fine Structure Technique
Authors: Bahaa-Eldin Hassan , Eissa Mamdouh , Al-Sheikh Ahmed , El-Fawkhry Mohamed Kamal , Mattar Taha
Published: March 2020

Reduction in grain size of bcc based structure steel is still highly concerned in the cold rolled sheet to attain superior mechanical properties. As long as, the reduction of weight is much considered in the structure purposes, the strength/weight ratio of steel is highly demanded. In this study, an innovative technique was applied to attain ferrite grain size with hundreds of nanometer, in tandem with preserving the mechanical properties. In this approach, the micro-alloyed low carbon steel resulted from the thermomechanical process was followed by subcritical annealing regime prior to the first critical transformation temperature. To identify the effect of a micro-alloying element as vanadium, and the effect of subcritical annealing regime on the low carbon steel, two low carbon steel was subjected to studying in this research. The results refer that applying a subcritical annealing regime for the micro-alloyed low carbon steel after hot compression at intercritical annealing temperature can lead for attaining hundreds of nanometer ferrite grain size, which has a powerful effect on promoting the strength of the steel to exceed 1200 Mpa, in one hand with preserving the formability up to 20% as uniform elongation. Unexpectedly, the fine grain size obtained after the innovative technique promotes the impact toughness at room temperature, which is attributed to the fineness and the spheroid morphology of the secondary phase in conjugation with bcc ferrite structure.
Determination of Charge Coefficient of Piezoelectric Films Using a Combined Finite Element Model and Dynamic Loading Technique
Authors: Bernard Oboso P. , Shaalan Nagih M. , Hossam Mohab , Hassan Mohsen A.
Published: March 2020

Accurate determination of piezoelectric properties such as piezoelectric charge coefficients (d33) is an essential step in the design process of sensors and actuators using piezoelectric effect. In this study, a cost-effective and accurate method based on dynamic loading technique was proposed to determine the piezoelectric charge coefficient d33. Finite element analysis (FEA) model was developed in order to estimate d33 and validate the obtained values with experimental results. The experiment was conducted on a piezoelectric disc with a known d33 value. The effect of measuring boundary conditions, substrate material properties and specimen geometry on measured d33 value were conducted. The experimental results reveal that the determined d33 coefficient by this technique is accurate as it falls within the manufactures tolerance specifications of PZT-5A piezoelectric film d33. Further, obtained simulation results on fibre reinforced and particle reinforced piezoelectric composite were found to be similar to those that have been obtained using more advanced techniques. FE-results showed that the measured d33 coefficients depend on measuring boundary condition, piezoelectric film thickness, and substrate material properties. This method was proved to be suitable for determination of d33 coefficient effectively for piezoelectric samples of any arbitrary geometry without compromising on the accuracy of measured d33.
Weldability of Dual Phase Steel Containing Boron
Authors: Morsy Morsy Amin , Khafagy Sameh M. , Farahat Ahmed Ismail Zaky
Published: March 2020

Carbon steel containing boron-dual phase was produced by casting and were heated to 1200 °C for hot forging to produce plates of 10 and 6 mm thick. The plates produced were heated to the inter-critical annealing temperature for 15 min. and then water quenched followed by tempering process. The microstructure of the produced steel is ferrite with islands of martensite. Welding was done to the heat treated steel plates (6mm) using SMAW process and applying AWS-E11016 electrode and as a result an over-tempered region in the heat affected zone was formed with a significant reduction of the ultimate tensile strength of the welded joint. Reduction of heat input resulted in an increase in the joint strength. Welding of the hot rolled plates with a subsequent heat treatment resulted in formation of homogenous joint with good mechanical and metallurgical properties. Application of Electron Beam Welding to this dual phase steel resulted in a welded joint with good mechanical properties comparable to that of the base metal. The results were discussed based on microstructure analysis and hardness distribution of the welded joints.
Corrosion Behavior of Ti-7 Wt.% Mn Alloy in Artificial Saliva
Authors: Attia Adel , Khorshed Lobna A. , Mohamed Lamiaa Z. , Gepreel Mohammed A.
Published: March 2020

Ti-Mn alloy has a high specific strength, excellent cold workability and good biocompatibility. A cold rolled Ti-7 wt.% Mn was compared to annealed sample at 900°C for 10 min and the corrosion resistance property was tested in artificial saliva solution (AS). The Ti-7 wt.% Mn alloys (cold rolled and annealed) were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), Energy dispersive X-ray analysis (EDX) and compared to pure Ti. Simultaneously, the alloys tested in the AS solution for up to 28 days mainly by following the open-circuit potential (OCP), electrochemical impedance spectroscopy (EIS), SEM and EDX. Annealed Ti-7wt.% Mn showed good corrosion properties similar to that of pure Ti, hence the new Ti-7wt.%Mn alloy have higher specific strength than pure Ti, yet showed same corrosion properties which favor implanted dental applications.
Casting and Laser Surface Melting of 316L Stainless Steel from Scrap Resources
Authors: Elgazzar Haitham , El-Hadad Shimaa , Abdel-Sabour Hassan
Published: March 2020

316L stainless steel is used in various industrial applications including chemical, biomedical and mechanical industries due to its good mechanical properties and corrosion resistance. Recycling of 316L stainless steel scrap without significantly reducing its value has received recently great attention because of the environmental regulations. In the current work, 316L stainless steel scrap was recycled via casting using Skull induction melting technique. The casted products subsequently subjected to laser surface melting process to improve its surface properties to be used for harsh environment. The results showed defect free surfaces with homogeneous microstructures. Nano size grains were also obtained due to rapid solidification process. Such nano size grains are preferred for extending the usage of the 316L stainless steel in new applications.Corresponding author: E-Mail: elgazzar.ha@gmail.com
Effect of Aluminum and Vanadium on Retained Austenite Stability and Work Hardening in Silicon Free TRIP Steel
Authors: El-Sherbiny Ahmed , El-Fawkhry Mohamed Kamal , Shash Ahmed Y. , El-Hossainy Tarek M. , Fathy Ayman Mohamed , Mattar Taha
Published: March 2020

Despite that the conventional CSiMn TRIP steel has a promissing mechanical attributes, it has a limitations on the galvanizability of such grades of steel due to Silicon. Thus, aluminum as a strong candidate for substituting silicon has been introduced in this study accompanied by vanadium as a microalloying element. Microstructure of the studied steel was observed by using OM, and SEM. X-ray diffraction analysis, and tent-etching technique carried out on the studied steel to identify the fractions of the retained Austenite after thermal mechanical process, as well as its morphology. In addition, the mechanical properties in term of strength, ductility, strain hardening, and the rate of strain hardening were studied to define the influenced parameters throughout this alteration. The results refer to the possibility of complete replacement of silicon in TRIP steel with aluminum at the presence of vanadium as a micro alloying element.
Production of Ferrosilicoaluminium from Aluminum Slag and Local Ore Via Carbothermic Reduction
Authors: Ahmed Azza , El-Faramawy Hoda , Ghali Saeed , Mishreky Michel L.
Published: March 2020

This paper deals with the possibility of obtaining FeSiAl complex alloy by carbothermic reduction in a submerged arc furnace using aluminum dross, mill scale and feldspar.Bench scale experiments are carried out to clarify the effect of different variants such as reducing agent, basicity, and mill scale content of the charge on the metallic yield and chemical composition of the produced alloy.It was possible to get FeSiAl alloy containing 22% Si and 18% Al. the results reveal that to obtain such alloy less than 20% mill scale must be involved in the charge and the coke with amount 1 stoichiometric must be used.
Epigenetic Regulation of TLR4 in Diabetic Macrophages Modulates Immunometabolism and Wound Repair
Authors: Davis Frank M. , denDekker Aaron , Kimball Andrew , Joshi Amrita D. , El Azzouny Mahmoud , Wolf Sonya J. , Obi Andrea T. , Lipinski Jay , Gudjonsson Johann E. , Xing Xianying , Plazyo Olesya , Audu Christopher , Melvin William J. , Singer Kanakadurga , Henke Peter K. , Moore Bethany B. , Burant Charles , Kunkel Steven L. , Gallagher Katherine A.
Published: March 2020

Macrophages are critical for the initiation and resolution of the inflammatory phase of wound healing. In diabetes, macrophages display a prolonged inflammatory phenotype preventing tissue repair. TLRs, particularly TLR4, have been shown to regulate myeloid-mediated inflammation in wounds. We examined macrophages isolated from wounds of patients afflicted with diabetes and healthy controls as well as a murine diabetic model demonstrating dynamic expression of TLR4 results in altered metabolic pathways in diabetic macrophages. Further, using a myeloid-specific mixed-lineage leukemia 1 (MLL1) knockout (Mll1f/fLyz2Cre+), we determined that MLL1 drives Tlr4 expression in diabetic macrophages by regulating levels of histone H3 lysine 4 trimethylation on the Tlr4 promoter. Mechanistically, MLL1-mediated epigenetic alterations influence diabetic macrophage responsiveness to TLR4 stimulation and inhibit tissue repair. Pharmacological inhibition of the TLR4 pathway using a small molecule inhibitor (TAK-242) as well as genetic depletion of either Tlr4 (Tlr4−/−) or myeloid-specific Tlr4 (Tlr4f/fLyz2Cre+) resulted in improved diabetic wound healing. These results define an important role for MLL1-mediated epigenetic regulation of TLR4 in pathologic diabetic wound repair and suggest a target for therapeutic manipulation.
The Arianna thread: the matching of S-100 family with the RyR’s muscle receptor
Authors: Fulle Stefania , Belia Silvia , Fanò Illic Giorgio
Published: March 2020

The functional state of RyR depends on the intracellular calcium concentration and on the oxidation state of its protein components in some particular sites and of some sentinel amino acids. In addition to the regulation of the RyR channel by exogenous substances (caffeine, ryanodine), ions environmental situations (oxidative state), other components, such as some endogenous proteins present in the sarcoplasm and/or in muscle membranes that are able to determine changes in Ca2+ channel activity. Among these, calmodulin and S-100A could determine modifications in the status of RyR channel in the skeletal muscle. The currently available data can be justified the use of a simplified S-100/CaM and RyR interaction model for the regulation of Ca2+ release in skeletal muscle. Under resting conditions, the CaM/S100A1 binding domain on RyR1 is predominantly dependent on S100A1. Vice versa when the intracellular Ca2+ concentration becomes high as well as during repetitive (tetanus) stimulation, the Ca-CaM bond becomes dominant, shifting S100A1 from RyR1 and promoting channel inactivation. This may be one of the mechanism of muscle fatigue.
Can MRI quantify the volume changes of denervated facial muscles?
Authors: Mastryukova Valeria , Arnold Dirk , Güllmar Daniel , Guntinas-Lichius Orlando , Volk Gerd Fabian
Published: March 2020

Could manual segmentation of magnetic resonance images be used to quantify the effects of transcutaneous electrostimulation and reinnervation of denervated facial muscle? Five patients with unilateral facial paralysis were scanned during the study while receiving a daily surface electrostimulation of the paralytic cheek region, but also after reinnervation. Their facial muscles were identified in 3D (coronal, sagittal, and axial) and segmented in magnetic resonance imaging (MRI) data for in total 28 time points over the 12 months of study. A non-significant trend of increasing muscle volume were detected after reinnervation. MRI is a valuable technique in the facial paralysis research.
Некоторые тригонометрические полиномы с экстремально малой равномерной нормой и их приложения
Authors: Radomskii Artyom Olegovich
Published: March 2020

Построены ортогональные тригонометрические полиномы с новым условием на спектр, у которых $L^{1}$-нормы ограничены снизу, а равномерная норма частичных сумм имеет экстремально малый порядок. Получены новые результаты о связи между равномерной нормой и $\mathrm{QC}$-нормой на подпространствах в пространстве тригонометрических полиномов.
Библиография: 13 наименований.
Editorial
Authors: Lorenzo María
Published: March 2020

Editorial del décimo número de Con A de Animación.
Del inacabado al boceto como elemento estético: los "pencil tests" de Glen Keane
Authors: Rodríguez-González Manuela-Elizabeth
Published: March 2020

En estudios como Walt Disney Animation, el dibujo abocetado que conforma las pruebas de lápiz o “pencil tests”, es depurado para obtener los fotogramas que darán lugar a la animación definitiva de acetatos. En el presente artículo analizaremos la presencia del trazo esbozado de Glen Keane en el resultado final de sus animaciones experimentales, Duet y Nephtali. En segundo lugar, veremos la transformación que sufre la línea de sus borradores a un contorno limpio y depurado, en las secuencias que forman parte de películas como La Bella y la Bestia o Tarzán. Y, por último, reflexionaremos cómo esta prueba de lápiz puede considerarse como definitiva dentro de animaciones de estética más comercial, en Pocahontas.
La animación en bucle como dibujo vivo. Las repeticiones de Francis Alÿs
Authors: Castellano San Jacinto Tania
Published: March 2020

Francis Alÿs, belga residente en México desde hace más de treinta años, es un artista contemporáneo con una trayectoria basada en lo performático, en la que también incluye una animación de naturaleza sencilla. La interacción entre sus dibujos en movimiento y el resto de su obra ubican a los primeros en un territorio interconectado a otros registros artísticos, a la vez que los transforma ampliando sus posibilidades dentro del dibujo. Esta relación provoca una difícil categorización que escapa a toda clasificación rígida. Por último, el hecho de que las animaciones seleccionadas se estructuren como bucle genera un tipo de visionado particular, en el que se juega con la desposesión y la ilusión de control de la imagen.
Hacia una imaginación goblal hecha a medida. Jimoto PR anime, ¿una nueva era en la producción del anime?
Authors: Bonillo Fernández Claudia
Published: March 2020

El anime se ha convertido en una de las grandes bazas de la diplomacia pública japonesa para publicitar el encanto de Japón. El gobierno japonés es consciente de este hecho, y apoya más que nunca el movimiento Cool Japan. Como resultado, algunos anime ya no exportan una visión personal de Japón, sino una hecha a medida. En relación con la creciente popularidad del anime, desde los años noventa del pasado siglo el peregrinaje otaku ha atraído turismo y revitalizado así la economía de las prefecturas. Podemos decir, por tanto, que el peregrinaje otaku es una consecuencia del éxito del anime. Sin embargo, recientemente ha habido un incremento en los anime cuyo principal objetivo es la promoción de prefecturas concretas. Mediante el estudio de algunos casos representativos, pretendemos investigar qué aspectos está interesado en promocionar Japón y cómo lo hace.
Sensitivity of WRF-Chem model resolution in simulating particulate matter in South-East Asia
Authors: Adedeji Adedayo Rasak , Dagar Lalit , Petra Mohammad Iskandar , De Silva Liyanage C. , Tao Zhining
Published: March 2020

Abstract. Frequent haze episodes commonly caused by biomass burning has been a concern in South East Asia. One of such events was the June 2013 severe haze in the region. This study assessed the ability of WRF-Chem in capturing the spatial variability and concentrations of particulate emissions during this period. It analyzed the regional biomass burning emissions and its transport leading to higher particulate matter levels in the region. In order to analyze the effect of grid-scale, the horizontal resolution of the simulation was varied between low-resolution (100 km) and high-resolution (20 km). Evaluations of the simulations were made against meteorological observations pertinent to emission and transport of particulate matter, including surface and vertical air profile variables such as temperature, relative humidity, and wind speed and direction. Particulate matter (PM10 and PM2.5) levels were evaluated using ground measurements in Brunei and Singapore respectively. The meteorological parameters were adequately represented across the model simulations. Increasing the horizontal resolution of the simulations generally improved the representation of meteorology and air quality but some prognostic variables maintained similar or better performance with coarse resolution simulation. With the high-resolution simulation, PM10 concentration in Brunei had a correlation coefficient around 0.4, and the simulated PM2.5 level in Singapore had correlation coefficient around 0.9. Whereas, the low-resolution simulation had correlation coefficients around 0.2 and 0.8 for PM10 and PM2.5 levels at Brunei and Singapore, respectively. Both simulations could not repeat aerosol optical depth (AOD) from reanalysis unless the biomass burning emissions were enhanced. An enhancement factor of 6 with high-resolution simulation gave PM10 and PM2.5 correlations around 0.6 and 0.9 in Brunei and Singapore respectively.
Dissecting effects of orbital drift of polar-orbiting satellites onaccuracy and trends of cloud fractional cover climate data records
Authors: Bojanowski Jędrzej S. , Musiał Jan P.
Published: March 2020

Abstract. Radiometers such as the AVHRR mounted aboard a series of the NOAA and MetOp polar-orbiting satellites provide 4-decade-long global climate data records (CDRs) of cloud fractional cover. Generation of such long datasets requires combining data from consecutive satellite platforms. A varying number of satellites operating simultaneously in the morning and afternoon orbits, together with the satellite orbital drift cause the uneven sampling of the cloudiness diurnal cycle along a course of CDR. This in turn leads to significant biases, spurious trends and inhomogeneities in the data records of climate variables featuring the distinct diurnal cycle (such as clouds). To quantify the uncertainty and magnitude of spurious trends in the AVHRR-based cloudiness CDRs, we sampled the 30-minute reference CM SAF Cloud Fractional Cover dataset derived from Meteosat First and Second Generation (COMET) at times of the NOAA and MetOp satellites overpasses. The sampled cloud fractional cover (CFC) time series were aggregated to monthly means and compared with the reference COMET dataset covering the Meteosat disc (up to 60 degrees N/S/W/E). For individual NOAA/MetOp satellites the errors in mean monthly CFC reach ± 10 % (bias) and ± 7 % per decade (spurious trends). For the combined data record consisting of several NOAA/MetOp satellites, the CFC bias is 3 % and the spurious trends are 1 % per decade. This study proves that before 2002 the AVHRR-derived CFC CDRs do not comply with the GCOS temporal stability requirement of 1 % CFC per decade just due to the satellite orbital drift effect. After this date the requirement is fulfilled due to the numerous NOAA/MetOp satellites operating simultaneously. Yet, the time series starting in 2003 is shorter than 30 years that voids climatological analyses. We expect that the error estimates provided in this study will allow for a correct interpretation of the AVHRR-based CFC CDRs and ultimately will contribute to the development of a novel satellite orbital drift correction methodology widely accepted by the AVHRR-based CDRs providers.
Local stratopause temperature variabilities and their embedding in the global context
Authors: Eixmann Ronald , Matthias Vivien , Höffner Josef , Baumgarten Gerd , Gerding Michael
Published: March 2020

Abstract. The stratopause is by definition the transition between the
stratosphere and mesosphere. During winter the circulation at mid-latitudes and
high latitudes in the stratosphere is mainly driven by quasi-stationary planetary waves (PWs), while the circulation in the
mesosphere is mainly driven by gravity waves (GWs). The question
arises of whether PWs or GWs dominate the variability of the
stratopause. The most famous and dramatic variability of the middle
atmosphere is a sudden stratospheric warming (SSW) generated by PWs
interacting with the polar vortex. A similar phenomenon but smaller in
magnitude and more regional is stratopause temperature enhancements
(STEs) initially observed by local measurements and generated by
breaking PWs. Thus it seems that PWs dominate the variability of the
stratopause. In this study we want to quantify to which extent quasi-stationary PWs contribute to the stratopause variability. To do that
we combine local lidar observations at Kühlungsborn
(54∘ N, 11∘ E) and Andenes (69∘ N,
16∘ E) with global MERRA-2 reanalysis data bringing the
local variability of the stratopause into the global
context. Therefore we compare the temperature time series at
Kühlungsborn and Andenes at 2 hPa, the altitude where STEs
maximize, with characteristics (amplitude and phase) of PWs with wave
numbers 1, 2 and 3. We found that for Kühlungsborn and Andenes
98 % of the local day-to-day variability of the
stratopause can be explained by the variability of PWs with wave
number 1, 2 and 3. Thus, the winter stratopause day-to-day
variability is highly dominated by the variability of PWs.