bluuebunny/crossref_metadata_2025 huggingface dataset:
THE INTERACTIONS AND TRADE-OFFS OF SOVEREIGN CREDIT DEFAULT SWAP (CDS) AND BOND SPREADS IN A DYNAMIC CONTEXT
Authors: Tampakoudis Ioannis A. , Tamošiūnas Andrius , Subeniotis Demetres N. , Kroustalis Ioannis G.
Published: April 2019

This study provides a dynamic analysis of the lead-lag relationship between sovereign Credit Default Swap (CDS) and bond spreads of the highly indebted southern European countries, considering an extensive time sample from the period before the global financial crisis to the latest developments of the sovereign indebtedness in the euro area. We employ an integrated price discovery methodology on a rolling sample, with the intention to shed light on whether the CDS spreads can trigger rises in bond spreads, and the relative efficiency of credit risk pricing in the CDS and bond markets. In addition, we attempt to depict the evolution of the price discovery process regarding the direction of influence from one market to the other. The rolling window analysis verifies that the price discovery process evolves over time, presenting frequent alternations concerning the leading market. We find that during periods of economic turbulence the CDS market leads the bond market in price discovery, incorporating the new information about sovereign credit risk faster and more efficiently than the bond market does. This regularity should be seriously considered by private and public participants as they make investment and funding decisions. Therefore, the motivation of our paper is to identify the dominant market in terms of price discovery during a period of economic turmoil and, thus, to provide insights for decision making to investment bodies and central governments.
Mittag-leffler string stability of singularly perturbed stochastic systems within local fractal space
Authors: Sayevand Khosro
Published: April 2019

In this paper, we define a new type of string stability based on Mittag-Leffler function so-called Mittag-Leffler (p\alpha)-string stability. This kind of stability for a class of singularly perturbed stochastic systems of fractional order will be considered. The fractional derivative in these systems is in the local sense. String stability indicates uniform boundedness of the interconnected system if the initial cases of interconnected system be uniformly bounded. The deduction of the sufficient conditions of stability is based on a mixture of the concept of the Mittag-Leffler stability with the notion of p-mean string stability of singularly perturbed stochastic systems. In the sequel, our purpose is to investigate the full order system in their lower order subsystems, i.e., the reduced order system and the boundary layer correction.
A HISTORY-DEPENDENT FRICTIONAL CONTACT PROBLEM WITH WEAR FOR THERMOVISCOELASTIC MATERIALS
Authors: Chouchane Lamia , Selmani Lynda
Published: April 2019

In this manuscript we study a contact problem between a deformable viscoelastic body and a rigid foundation. Thermal effects, wear and friction between surfaces are taken into account. A variational formulation of the problem is supplied and an existence and uniqueness result is proved. The idea of the proof rested on a recent result on history-dependent quasivariational inequalities. Finally, a perturbation of the data is initiated and a convergence result is demonstrated when the perturbation parameter converges to zero.
THE POINT CHARGE OSCILLATOR: QUALITATIVE AND ANALYTICAL INVESTIGATIONS
Authors: Schneider Klaus R.
Published: April 2019

We study the mathematical model of the point charge oscillator which has been derived by A. Beléndez et al. [2]. First we determine the global phase portrait of this model in the Poincaré disk. It consists of a family of closed orbits surrounding the unique finite equilibrium point and of a continuum of homoclinic orbits to the unique equilibrium point at infinity.

Next we derive analytic expressions for the relationship between period (frequency) and amplitude. Further, we prove that the period increases monotone with the amplitude and derive an expression for its growth rate as the amplitude tends to infinity.

Finally, we determine a relation between period and amplitude by means of the complete elliptic integral of the first kind K(k) and of the Jacobi elliptic function cn.
Toward a Self-calibrating, Empirical, Light-weight Model for Tellurics in High-resolution Spectra
Authors: Leet Christopher , Fischer Debra A. , Valenti Jeff A.
Published: April 2019

To discover Earth analogs around other stars, next generation spectrographs must measure radial velocity with 10 cm s−1 precision. Since even microtellurics can induce RV errors of up to 50 cm s−1, achieving 10 cm s−1 precision requires precise modeling of telluric absorption features. The standard approaches to telluric modeling are (a) observing a standard star and (b) using a radiative transfer code. Observing standard stars, however, takes valuable observing time away from science targets. Radiative transfer codes, meanwhile, may omit microtelluric features, which are an important contributor to the RV error budget at 10 cm s−1. To address these issues, we present a telluric model of the self-calibrating, empirical, light-weight linear regression telluric (SELENITE) model for high-resolution spectra. The model exploits two simple observations: (a) water tellurics grow proportionally to precipitable water vapor and therefore proportionally to each other and (b) non-water tellurics grow proportionally to airmass. Water tellurics can be identified by looking for pixels whose growth correlates with a known calibration water telluric and modeled by regression against it, and likewise non-water tellurics with airmass. The model does not require line data, water vapor measurements, or additional observations (beyond one-time calibration observations), achieves fits with a

of 1.17 on B stars and 2.95 on K dwarfs, and leaves residuals of 1% (B stars) and 1.1% (K dwarfs) of continuum. Fitting takes seconds on laptop PCs; SELENITE is light-weight enough to guide observing runs.
Fe i Lines in 0.91–1.33 μm Spectra of Red Giants for Measuring the Microturbulence and Metallicities
Authors: Kondo Sohei , Fukue Kei , Matsunaga Noriyuki , Ikeda Yuji , Taniguchi Daisuke , Kobayashi Naoto , Sameshima Hiroaki , Hamano Satoshi , Arai Akira , Kawakita Hideyo , Yasui Chikako , Izumi Natsuko , Mizumoto Misaki , Otsubo Shogo , Takenaka Keiichi , Watase Ayaka , Asano Akira , Yoshikawa Tomohiro , Tsujimoto Takuji
Published: April 2019

For a detailed analysis of stellar chemical abundances, high-resolution spectra in the optical have mainly been used, while the development of near-infrared (NIR) spectrograph has opened new wavelength windows. Red giants have a large number of resolved absorption lines in both the optical and NIR wavelengths, but the characteristics of the lines in different wave passbands are not necessarily the same. We present a selection of Fe i lines in the z′, Y, and J bands (0.91–1.33 μm). On the basis of two different lists of lines in this range, the Vienna Atomic Line Database (VALD) and the catalog published by Meléndez & Barbuy in 1999 (MB99), we selected sufficiently strong lines that are not severely blended and compiled lists with 107 Fe i lines in total (97 and 75 lines from VALD and MB99, respectively). Combining our lists with high-resolution (λ/Δλ = 28,000) and high signal-to-noise (>500) spectra taken with an NIR spectrograph, WINERED, we present measurements of the iron abundances of two prototype red giants: Arcturus and μ Leo. A bootstrap method for determining the microturbulence and abundance together with their errors is demonstrated. The standard deviations of

values from individual Fe i lines are significantly smaller when we use the lines from MB99 instead of those from VALD. With the MB99 list, we obtained

and

dex for Arcturus, and

and

dex for μ Leo. These final values show better agreements with previous values in the literature than the corresponding values we obtained with VALD.
On the Polarized Nonthermal Emission from AR Scorpii
Authors: Takata J. , Cheng K. S.
Published: April 2019

We study linear polarization of optical emission from white dwarf (WD) binary system AR Scorpii. The optical emission from this binary is modulating with the beat frequency of the system, and it is highly polarized, with the degree of the polarization reaching ∼40%. The angle of the polarization monotonically increases with the spin phase, and the total swing angle can reach 360° over one spin phase. It is also observed that the morphology of the pulse profile and the degree of linear polarization evolve with the orbital phase. These polarization properties can constrain the scenario for nonthermal emission from AR Scorpii. In this paper, we study the polarization properties predicted by the emission model, in which (i) the pulsed optical emission is produced by the synchrotron emission from relativistic electrons trapped by magnetic field lines of the WD and (ii) the emission is mainly produced at magnetic mirror points of the electron motion. We find that this model can reproduce the large swing of the polarization angle, provided that the distribution of the initial pitch angle of the electrons that are leaving the M-type star is biased to a smaller angle rather than a uniform distribution. The observed direction of the swing suggests that the Earth viewing angle is less than 90° measured from the WD spin axis. The current model prefers an Earth viewing angle of 50°–60° and a magnetic inclination angle of 50°–60° (or 120°–130°). We discuss that the different contribution of the emission from M-type star to total emission causes a large variation in the pulsed fraction and the degree of the linear polarization along the orbital phase.
A Comprehensive Analysis of Spitzer Supernovae
Authors: Szalai Tamás , Zsíros Szanna , Fox Ori D. , Pejcha Ondřej , Müller Tomás
Published: April 2019

The mid-infrared (mid-IR) wavelength regime offers several advantages for following the late-time evolution of supernovae (SNe). First, the peaks of the SN spectral energy distributions shift toward longer wavelengths, following the photospheric phase. Second, mid-IR observations suffer less from effects of interstellar extinction. Third, and perhaps most important, the mid-IR traces dust formation and circumstellar interaction at late times (>100 days) after the radioactive ejecta component fades. The Spitzer Space Telescope has provided substantial mid-IR observations of SNe since its launch in 2003. More than 200 SNe have been targeted, but there are even more SNe that have been observed serendipitously. Here we present the results of a comprehensive study based on archival Spitzer/IRAC images of more than 1100 SN positions; from this sample, 119 SNe of various subclasses have been detected, including 45 SNe with previously unpublished mid-IR photometry. The photometry reveals significant amounts of warm dust in some cases. We perform an in-depth analysis to constrain the origin and heating mechanism of the dust, and present the resulting statistics.
Des doctorants en « démo ». Ethnographie de deux sessions posters des Doctoriales
Authors: Frances Jean
Published: April 2019

Cet article propose l’ethnographie de sessions posters des Doctoriales dont la vocation est d’initier des apprentis-chercheurs à exposer des anticipations techno-scientifiques sur la base de travaux de thèse. Il s’agira de se demander ici ce que l’apprentissage à la communication promotionnelle des sciences fait à la présentation d’un projet de recherche doctorale. Mobilisant le concept de « démo » développé par C. Rosental, il sera également question de saisir comment ces sessions posters, en même temps qu’elles initient les doctorants à promettre et promouvoir des résultats scientifiques, les (pré)forment à évoluer dans des mondes de la recherche organisés en clusters , autour de contrats, d’appels d’offres et de partenariats public-privé.
Au service du client, au nom de la communauté
Authors: Jammet Thomas
Published: April 2019

Avec l’essor des plateformes conversationnelles du Web social, l’animation de « communautés en ligne » s’est vue conférer une importance stratégique pour les entreprises et les marques. L’administration de ces nouveaux espaces de communication promotionnelle a conduit à l’émergence de l’activité de community management . Cet article analyse de quelle manière les acteurs de cette fonction émergente cherchent à faire reconnaître leur travail d’intermédiation au fil des échanges avec leurs clients, et fait voir une tension centrale autour de la mesure chiffrée du résultat de l’activité. Les efforts des community managers pour imposer des conventions d’évaluation répondant à leur représentation du Web social sont étudiés dans une perspective pragmatique d’intermédiation marchande, au moyen d’une enquête ethnographique conduite pendant plus de deux ans au sein d’une agence conseil en communication.
De l’équipement des relations pilotes-contrôleurs
Authors: Bénéjean Marie
Published: April 2019

En prenant comme terrain d’étude le domaine de la navigation aérienne comme archétype de la recherche d’une informatisation et d’une automatisation maximale, nous questionnons la place et le rôle des Technologies Numériques d’Information et de Communication (TNIC) dans les pratiques de travail des pilotes et des contrôleurs aériens. Plus spécifiquement, nous interrogeons la manière dont les systèmes techniques informationnels actuellement déployés viennent équiper les activités de production d’informations et de communication et, ce faisant, viennent soutenir ce que nous identifions comme un processus de rationalisation de ces activités.
Retour empirique sur l’attention oblique
Authors: Berjaud Clémentine
Published: April 2019

Cet article se propose de revenir sur la notion d’attention oblique à partir de données empiriques approfondies issues du cas des discours télévisés d’Hugo Chavez au Venezuela. Qui y est attentif ? De quelle manière ? Comment appréhender ces variations ? À quoi est-on (in)attentif pendant un discours ? Selon quelles modalités et selon quels facteurs ? En procédant par élargissements successifs, l’attention oblique sera d’abord étudiée au prisme de ses mécanismes concrets pendant les discours. Ensuite, l’analyse s’attachera à décrypter les traces de ce qui a retenu leur attention, par le biais de leurs premières réactions, socialement diversifiées, avant, enfin, de réinscrire ces éléments dans leurs pratiques quotidiennes, largement ancrées dans l’espace domestique.
La demande de livres de fiction en bibliothèques
Authors: Lumeau Marianne , Thierry Clémence
Published: April 2019

L’objet de cet article est d’étudier la demande de livres de fiction en bibliothèques, à partir d’une base de données originale fournie par le Bureau des Bibliothèques de la Ville de Paris. Ce travail est le premier à caractériser la demande de livres de fiction en bibliothèques publiques de prêt et à s’interroger sur le rôle de la recommandation en et hors bibliothèques. Les résultats de cet article montrent que la distribution des emprunts est relativement peu concentrée en bibliothèques parisiennes, dans la mesure où 20 % des titres empruntés réalisent près de 67 % des emprunts totaux. Par ailleurs, la distribution de la demande de titres en bibliothèques ne semble pas suivre une loi statistique de Pareto. Autrement dit, les usagers des bibliothèques de la Ville de Paris portent leurs choix d’emprunt sur une multitude de titres. Un autre résultat est de montrer le rôle notable des recommandations issues des bibliothécaires sur le niveau d’emprunt d’un titre. Dans une moindre mesure, les recommandations hors bibliothèques, notamment issues d’experts, influencent le nombre de fois où un titre est emprunté. Enfin, il semble exister un lien fort entre l’emprunt et l’achat, dans la mesure où les titres ayant précédemment fait partie des meilleures ventes sont largement empruntés en bibliothèques parisiennes.
Cultural studies versus économie politique : qui d’autre en a assez de ce débat ?
Authors: Grossberg Lawrence , Morin Céline
Published: April 2019

Ce texte est la traduction d’un article de Lawrence Grossberg publié en 1995 dans la revue Critical Studies in Mass Communication . L’auteur répond à Nicholas Garnham en rejetant la définition et la généalogie que ce dernier donne des cultural studies et de l’économie politique de la communication. Grossberg observe que le courant populiste et célébratoire auquel Garnham assimile les cultural studies est en réalité minoritaire et contesté au sein même de cet espace de recherche. Tout en réaffirmant que l’économie politique n’est toujours pas parvenue à se défaire du réductionnisme, il défend le bien-fondé des frontières épistémologiques et empiriques entre économie politique et cultural studies . Finalement, il plaide, non pour leur réconciliation, mais pour un usage étendu du concept d’ articulation afin de saisir les liens entre politique, économie et culture.
Les maladies de la société
Authors: Honneth Axel , Voirol Olivier
Published: April 2019

La question des « maladies » ou des pathologies sociales fait partie des formes établies d’auto-compréhension des sociétés modernes. Se référer à la part sociale des pathologies engage toutefois une approche dépassant la simple addition des maux individuels. En reliant les symptômes individuels à des processus collectifs, les approches psychanalytiques de Freud et Mitscherlich pensent les « maladies de la société » comme des dysfonctions de la reproduction sociale. Une autre voie est d’identifier les pathologies sociales comme des réalisations faussées, dans les institutions sociales et les formes établies de socialisation, des normes que la société s’est elle-même donnée dans ses convictions éthiques fondamentales. Si ce trouble du rapport des sujets – individuels ou collectifs – à eux-mêmes est pathologique, on peut parler de « maladies de la société » lorsque différents univers fonctionnels, à défaut de s’articuler organiquement, entrent en collision au point de réduire la liberté sociale.
Le public et ses évolutions manquées
Authors: Carré Louis
Published: April 2019

Il s’agira dans cet article d’examiner, à travers sa filiation avec les travaux de l’École de Francfort (Adorno et Horkheimer, Habermas), la contribution d’Axel Honneth à une théorie critique de l’espace public. Après avoir mis en lumière les traits caractéristiques d’une telle approche, l’auteur revient sur les analyses proposées par Honneth en termes d’« évolutions manquées » de l’espace public moderne. Ce dernier apparaît comme étant traversé par des tendances contradictoires : incluant en principe tous les concernés à la participation aux débats publics, il n’est pas non plus exempt d’« hégémonie culturelle » de la part des classes dominantes ; tout en élargissant les canaux de la communication politique, il se prête aussi à des logiques de marchandisation de l’information qui ont pour effet de « dépolitiser » le public. En conclusion, à partir du diagnostic d’ensemble posé par Honneth, des pistes sont dégagées en vue de réfléchir aux enjeux nouveaux que soulève le « cyberespace » de l’internet pour la sphère publique démocratique.
Ouverture et préouverture des réunions visiophoniques
Authors: Mondada Lorenza
Published: April 2019

Cet article offre une analyse systématique des ouvertures d’interactions médiatisées par visioconférence. Sur la base d’un corpus vidéo enregistré dans un hôpital français, l’article étudie les effets configurants des technologies sur l’organisation de l’interaction et en particulier sur les ouvertures de réunions. Il étudie aussi les activités qui précèdent et suivent ces ouvertures, en décrivant une organisation séquentielle spécifique dans laquelle les participants s’orientent vers « pré-ouvertures » et « commencements » comme moments distincts des « ouvertures » proprement dites. Leur analyse permet d’intégrer les contraintes relatives à la connexion des participants et à distinguer états de co-présence, connexion et co-participation, ainsi que la manière dont ils sont établis et maintenus. Cela permet ainsi de revisiter la notion d’« ouverture » de l’interaction.
Scénographie d’une ouverture d’interaction vidéo
Authors: Ibnelkaïd Samira
Published: April 2019

Nous nous proposons ici de participer à l’appréhension du concept complexe d’espace d’interaction numérique sous l’angle de la « scène » pour filer la métaphore théâtrale de Goffman (1973) – l’interaction comme représentation – et reprendre le concept de scène d’énonciation de Maingueneau (1998). À partir d’un corpus de séquences d’ouvertures d’interactions vidéos, nous analysons par quels moyens les interactants aménagent une scénographie commune se joignant en un « mi-lieu », point de contact entre les multiples scènes d’énonciation impliquées dans l’interaction. L’énaction de la scénographie apparaît subordonnée aux affordances et produites à partir des ressources disponibles – composants de décor et émissions voco-posturo-mimo-gestuelles tant physiques que numériques. Ces ressources sont rendues accountable au moyen d’activités multimodales – techniques, discursives, corporelles. La structure interactionnelle des séquences (sous-séquences successives d’entrée en interaction) et des échanges (recours aux échanges insérés attestant l’engagement des interactants) révèle la collaboration entre des individus géographiquement distants qui œuvrent à se rendre présents l’un à l’autre.
Enjeux topologiques et topographiques de la cartographie du Web
Authors: Severo Marta , Venturini Tommaso
Published: April 2019

En 2003, l’UNESCO a approuvé la Convention pour la sauvegarde du patrimoine culturel immatériel. Bien que les États nationaux restent les interlocuteurs principaux de l’UNESCO, la Convention reconnait à des nombreux autres acteurs un rôle fondamental dans la conservation de ce patrimoine. Les traditions orales et les pratiques culturelles sont créées et soutenues par des réseaux vastes et complexes d’institutions, associations, organisations non gouvernementales, groupes et même de simples citoyens. La cartographie du Web s’avère une méthode particulièrement adaptée pour l’étude des relations entre ces acteurs en prenant en compte à la fois leurs connexions et leur positionnement spatial. Cet article vise à approfondir, en particulier, l’usage des concepts de topographie et topologie dans ce type de représentation.
Les mèmes Internet ont-ils un mode de propagation spécifique ?
Authors: Renaud Clément , Fernandez Valérie , Puel Gilles
Published: April 2019

Contenus humoristiques circulant très largement sur la Toile, les mèmes Internet représentent aujourd’hui un phénomène notable parmi les usages des réseaux sociaux en ligne. Sur le réseau social chinois Sina Weibo, les mèmes sont devenus une forme de discussion répandue aux particularités encore méconnues. Nous proposons ici d’observer la diffusion de différents types de contenus afin de mieux comprendre les spécificités des mèmes Internet. Nous procédons à la visualisation des dynamiques sémantiques, sociales et spatiotemporelles d’après un échantillon de contenus : marketing, actualité, humour et scandale politique. Nous proposons un modèle appelé topogramme afin de structurer la lecture des résultats produits par les outils de visualisation et d’analyse des données. Ce dispositif d’analyse peut être utile pour définir des modèles socio-sémantiques et spatio-temporels des contenus Internet.
Impact des réseaux sociaux sur la sociabilité
Authors: Dang Nguyen Godefroy , Lethiais Virginie
Published: April 2019

Nombre de chercheurs se sont interrogés depuis au moins une trentaine d’années, sur l’impact de la diffusion des technologies sur la sociabilité des individus. Facebook, en raison de sa popularité et des pratiques qu’il engendre, est un cas d’étude particulièrement intéressant. Dans cet article, nous utilisons les données issues d’une enquête déclarative menée auprès d’un échantillon représentatif de 2000 internautes français utilisateurs de Facebook, afin de mieux comprendre le lien entre l’utilisation du réseau social et la sociabilité. S’il existe un lien positif entre l’intensité d’utilisation de Facebook et la sociabilité, le réseau social est rarement vu comme un moyen de renforcer cette sociabilité. Plus précisément, nous montrons que Facebook contribue plus à augmenter les liens faibles que les liens forts, et que son influence perçue sur la sociabilité est fortement dépendante du contexte social et générationnel : les classes moins dotées culturellement et financièrement perçoivent en effet un impact plus fort du service en ligne sur leur sociabilité.
Hiérarchiser les tâches, classer les chômeurs
Authors: Pillon Jean-Marie
Published: April 2019

Le travail des conseillers au sein de Pôle emploi est pris en tension entre une injonction à la proximité avec les chômeurs et une injonction à l’efficacité. En prenant pour objet le quotidien des agents de l’opérateur public de placement, cet article interroge les effets des logiciels informatiques sur les modes concrets d’exercice du pouvoir hiérarchique et sur l’organisation spontanée du travail des agents. Il montre que l’efficacité des contraintes gestionnaires sur le travail dépend de leur conformité avec le langage informatique : les injonctions managériales ont une plus grande portée sur l’encadrement du travail lorsqu’elles sont formulées dans un langage compatible avec les outils informatiques de gestion. Inversement, les outils informatiques n’ont jamais autant d’influence que lorsqu’ils sont, rencontrent les intérêts de l’utilisateur. Dès lors, c’est au point de concours entre les intérêts de ces différents acteurs (développeurs, managers, conseillers) que les logiciels ont le plus d’influence. Or, c’est la recherche du gain de temps c’est-à-dire l’optimisation des ressources, qui constitue le souci le mieux partagé au sein de l’établissement. Les agents de Pôle emploi participent ainsi largement à la gestion du chômage qui leur est pourtant imposée.
Motivating Factors in a Student's Choice of Nursing as a Career
Authors: Kersten Joanne , Bakewell Karen , Meyer Delois
Published: April 2019

ABSTRACT

Motivation factors in a student's choice of nursing as a career were the focus of this study. There was a three-fold purpose: definition of nursing, reasons for choosing nursing, and who/what influenced their choice. A questionnaire was developed to collect data from a random national sample of nine BSN and 1 1 ADN NLN-accredited schools. The five most frequent responses to the question "What does nursing mean to you?" were: caring, personal growth, illness focus, professionalism, and job security. The most frequently reported reasons for choosing nursing were: nurturance, emotional needs, employment opportunities, financial benefits, and interest in science. Practicing nurses were identified most frequently as influencing students' image of nursing/choice of nursing. Nursing continues to be perceived as a caring profession as well as one that offers many personal benefits.
Les sciences humaines et sociales dans les relations scientifiques France-Brésil
Authors: Théry Hervé
Published: April 2019

Remontant aux origines de la collaboration en sciences sociales, l’article montre son impact sur l’évolution des concepts, renforcé par le programme Capes-Cofecub. Il note toutefois une tendance à se concentrer sur les régions, les quartiers et les groupes sociaux les plus défavorisés, négligeant les régions, secteurs économiques et groupes sociaux les plus prospères (ponérotropisme)
Une brève histoire du Département d’informatique de la PUC-Rio
Authors: Staa Arndt Von
Published: April 2019

Raconter l’histoire du département d’informatique de la PUC-Rio permet de revenir sur l’arrivée de l’informatique dans l’enseignement supérieur et la recherche au Brésil, et sur le rôle d’une université privée en particulier dans l’essor d’un domaine de pointe…
Le laboratoire international associé Bact-Inflam, l’aboutissement de 17 années de collaboration France-Brésil
Authors: Azevedo Vasco , Chatel Jean-Marc , Langella Philippe , Le Loir Yves
Published: April 2019

Le laboratoire international associé (LIA) Bact-Inflam, dédié à l’étude des bactéries et des maladies inflammatoires en santé humaine et animale, offre un exemple exceptionnel de coopération réussie entre le Brésil et la France depuis le début du XXIe siècle.
Frost Measuring and Prediction Systems for Demand Defrost Control
Authors: Lima de Aguiar Martim , Gaspar Pedro Dinis , da Silva Pedro Dinho
Published: April 2019

It is widely known that the defrosting operation of evaporators of commercial refrigeration equipment is one of the main causes of inefficiency on these systems. Several defrosting methods are used nowadays, but the most commonly used are still time-controlled defrosting systems, usually by either electric resistive heating or reverse cycle. This happens because most demand defrost methods are still considered complex, expensive, or unreliable. Demand defrost can work by either predicting frost formation by processing measured conditions (fin surface temperature, air humidity, and air velocity), operative symptoms of frost accumulation (pressure drop and refrigerant properties), or directly measuring the frost formation using sensors (photoelectric, piezoelectric, capacitive, resistive, etc.). The data measured by the sensors can be directly used by the system but can also be processed either by simple algorithms or more complex systems that use artificial intelligence and predictive methods. This chapter approaches frost sensing and prediction for command of demand defrost systems.
Reference on Rice Quality and Safety
Authors: Atungulu Griffiths , Shafiekhani Soraya
Published: April 2019

Over the last decade, there have been massive investments and research to improve rice yield per hectare. Alongside successful stories of improved rice yields are corresponding concerns stemming from pre- and post-harvest rice quality- and safety-related issues. Such concerns in rice production, handling, and storage systems present public health and economic problems. To consumers and producers, a serious concern is the potential growth of toxigenic fungi on rice during storage leading to contamination of the rice with mycotoxins. That withstanding, diminished functional, sensory, and nutritional attributes hugely impact the investment returns. The author understands that discourse on rice storage is incomplete without reflections on nutritional related losses. In rendering a strong chapter to meet a wider readership, the above issues are discussed with deliberate effort to highlight technological advances making headway in the rice industry; these are outlined in the introduction, at first, and then expounded on in subsequent sections.
Classifying the Influential Individuals in Multi-Layer Social Networks
Authors: Mittal Ruchi , Bhatia M.P.S
Published: April 2019

Nowadays, social media is one of the popular modes of interaction and information diffusion. It is commonly found that the main source of information diffusion is done by some entities and such entities are also called as influencers. An influencer is an entity or individual who has the ability to influence others because of his/her relationship or connection with his/her audience. In this article, we propose a methodology to classify influencers from multi-layer social networks. A multi-layer social network is the same as a single layer social network depict that it includes multiple properties of a node and modeled them into multiple layers. The proposed methodology is a fusion of machine learning techniques (SVM, neural networks and so on) with centrality measures. We demonstrate the proposed algorithm on some real-life networks to validate the effectiveness of the approach in multi-layer systems.
Fuzzy Logic-Based Predictive Model for the Risk of Type 2 Diabetes Mellitus
Authors: Idowu Peter Adebayo , Balogiun Jeremiah Ademola
Published: April 2019

This article presents a predictive model that can be used for the early detection of Type 2 Diabetes Mellitus using fuzzy logic. In order to formulate the model, risk factors associated with the risk of T2DM were elicited. The predictive model was formulated using fuzzy triangular membership functions following which the rules needed for the inference engine was elicited from experts. The model was simulated using the MATLAB Fuzzy logic Toolbox. The results of the study showed that the sensitivity of 11.67% and 100% precision for the low risk was recorded for both cases, specificity of 41.67% compared to 48.33% for the moderate risk, while there was 0% and 13.33% for the high risk. In conclusion, this model will help the doctor to know what course of preventive actions for a patient with high risk and what advice to give to those with low and moderate risk so that the occurrences of the diseases can be prevented altogether and thereby reducing the number of people dying from Type 2 Diabetes Mellitus diseases worldwide.
The Verification Pause
Authors: Tapia Andrea H. , Hughes Amanda Lee , LaLone Nicolas J
Published: April 2019

The purpose of this article is to investigate the verification pause—that moment when people assess how to respond to a disaster. The verification pause is potentially extended due to excess or insufficient information. Most evidence around the verification pause and its relation to new media is anecdotal. Using direct observations and interviews, this article presents a case study of the verification pause during an earthquake event. A classroom of 19 university students spent four minutes post-event behavior before evacuating. Through adaptive structuration theory (AST), the article contextualizes the students' response. Students used laptops and mobile devices to seek and share earthquake information with their extended social network. These online exchanges blended with the physical world as students shared what they learned with the classroom. The article concludes by suggesting that improved disaster response training and timely access to trustworthy information could shorten the verification pause and possibly save lives.
Feature Optimization in Sentiment Analysis by Term Co-occurrence Fitness Evolution (TCFE)
Authors: Sonawane Sudarshan S. , Kolhe Satish R.
Published: April 2019

The opinion of a target audience is a major objective for the assessing state of efficacy pertaining to reviews, business decisions surveys, and such factors that require decision making. Feature selection turns out to be a critical task for developing robust and high levels of classification while decreasing training time. Models are required for stating the scope for depicting optimal feature selection for escalating feature selection strategies to escalate maximal accuracy in opinion mining. Considering the scope for improvement, an n-gram feature selection approach is proposed where optimal features based on term co-occurrence fitness is proposed in this article. Genetic algorithms focus on determining the evolution and solution to attain deterministic and maximal accuracy having a minimal level of computational process for reflecting on the sentiment scope for sentiment. Evaluations reflect that the proposed solution is capable, which outperforms the separate filter-oriented feature selection models of sentiment classification.
HBSD
Authors: Khan Gitosree , Sarkar Anirban , Sengupta Sabnam
Published: April 2019

Enterprise cloud bus (ECBS) is a multi-agent-based abstraction layer framework, responsible for publishing and discovery of services in an Inter-cloud environment. Our work focuses on the service discovery model (HBSD) using Hadoop that leads to the challenges of automatic web service discovery patterns. It has been observed that the RDBMS can handle only data sizes up to a few Terabytes but fails to scale beyond that, so Apache Hadoop can be used for parallel processing of massive datasets. This article provides a novel Hadoop based Service Discovery (HBSD) approach that can handle vast amount of datasets generated from heterogeneous cloud services. The novelty of the proposed architecture coordinates cloud participants, automate service registration pattern, reconfigure discover services and focus on aggregating heterogeneous services from Inter-cloud environments. Moreover, this particle states a novel and efficient algorithm (HBSDMCA) for finding the appropriate service as per user's requirements that can provide higher QoS to the user request for web services.
Integrating Mobile Devices in the Mathematics Curriculum
Authors: Meletiou-Mavrotheris Maria , Paparistodemou Efi , Christou Christiana M.
Published: April 2019

The case study took place in a primary school in Cyprus (student ages 6-12), which implemented a two-year multifaceted professional development program aimed at the effective integration of tablet technologies within the mathematics curriculum. The program adopted a systemic, school-based and collaborative model of professional development that focused on the broad preparation and ongoing engagement of all key stakeholders. This article focuses on research conducted during the first year of the program implementation. It portrays the initial state of mobile device use in the case study school ecosystem, describes the process of tablet integration within the school setting, and interrogates the self-reported reflections of a core team of six (n=6) teachers in the school regarding their professional learning experiences as a result of participating in the program. Findings suggest that the model of professional development adopted by the program effectively contributed to the integration of mobile devices into the school setting and to teacher professional learning.
Ballooning Non-Performing Assets in Indian Banking and Insolvency and Bankruptcy Code
Authors: Tandon Deepak , Tandon Neelam
Published: April 2019

The Indian Banking sector is witnessing a phenomenal deterioration of asset quality, raising potential losses for not making enough provisions or setting aside capital to combat the non-performing assets. The aftermath of this is that the sustainability of robust banking is becoming a big question. Over the period of time, NPAs and bad loans have adding to a spiralling manner in Indian Banks. In this data-driven banking, various frauds have occurred due to lapses in operational risk, and non-adherence to procedures. Despite the treatment of stressed assets, prompt corrective action as per asset quality report by regulators but results are appearing at a very slow pace. Strength and sustainability of the credit growth is the need for robust banking in the times to come.
Ethics and Education
Authors: Ledwith Matthew C. , Jackson Ross A. , Reboulet Amanda M. , Talafuse Thomas P.
Published: April 2019

Education is a frequent area of concern when attempting to improve organizational performance. In this paper, absorbing Markov chains were used to assess education levels of civil servants within Air Force Materiel Command (AFMC). The results suggest that AFMC will have 47% of its workforce with an advanced, college degree by the year 2030. Given an increasingly educated workforce within AFMC, ethical implications for management strategy were explored. Specifically, the authors examined the ethics of managing a highly-educated workforce in ways which are procedurally similar to those used for a workforce which was historically less educated. Through a thematic bifurcation, ethical solutions were presented which will either provide more autonomy for the highly-educated workforce or attempt to change the internal credentialing process so that the current management strategies are aligned to a more appropriately-educated workforce.
Historia de una perdida y otros cuentos, de Cristina de la Concha: ética, gênero e sociedade
Authors: Alves Wanderlan
Published: April 2019

Neste artigo, faz-se uma leitura crítica das tensões de gênero e suas relações com a ética e a sociedade apresentadas nas narrativas de Historia de una perdida y otros cuentos, da mexicana Cristina de la Concha. A partir de um diálogo, assim como de um protesto ético em relação ao histórico de violência contra a mulher, no México e na América Latina, nesses contos do livro a autora promove o desmascaramento e a denúncia do silêncio e da naturalização a que, tradicionalmente, a violência simbólica e de fato contra a mulher são relegadas. Por tratar-se de uma escritora ainda praticamente desconhecida da crítica, o estudo visa, também, a apresentá-la ao público leitor brasileiro.
O Bobo de Herculano e seus modelos Ivanhoé e Notre Dame de Paris: a versão portuguesa da formação da nação
Authors: Pavanelo Luciene Marie
Published: April 2019

O artigo propõe uma análise do romance O Bobo, de Alexandre Herculano, em comparação com Ivanhoé, de Walter Scott, e Notre Dame de Paris, de Victor Hugo. Apesar de alguns críticos já terem se voltado à leitura comparativa das obras desses escritores, costuma-se focar no estudo de fontes e influências, procurando associar Herculano ao Romantismo. Propõe-se, neste estudo, uma leitura comparativa divergente da usualmente feita, como defende Santiago (2000) e Carvalhal (2006), buscando compreender as especificidades históricas desses autores, indo além de categorias estanques de escolas literárias. Pretende-se, com este trabalho, propor um novo olhar sobre a obra de Herculano, mormente na maneira como ele retratou o passado em O Bobo, distinta da forma como Scott e Hugo o fizeram. Conclui-se que a diferença nesse retrato que fazem do passado tem relação direta com a forma como esses escritores percebem não apenas o passado de seu país, mas também o seu presente.
Dress as a Marker of Identity Construction in Arab Women’s Literature from the Diaspora
Authors: Joudeh Amani Abu
Published: April 2019

Este artigo problematiza que o vestuário não é uma mera escolha que um indivíduo faz; em vez disso, metoniza quase todos os aspectos da sua identidade. Por meio de uma análise crítica dos romancistas britânicos árabes de Fadia Faqir (2014) Willow Trees Don´t Weep e de Leila Aboulela (2010) Lyrics Alley, o artigo acentua o hábil emprego do vestuário nesses romances e destaca suas diferentes implicações. Também traz à luz a forte relação entre os personagens principais e a escolha da vestimenta. Além disso, este estudo baseia-se em diferentes teorias de vestuário como um assunto interdisciplinar em sociologia, psicologia e estudos culturais. O artigo cita evidências textuais que enfocam as diferentes implicações do vestuário e mostra como esses autores usaram a vestimenta para comentar deliberadamente questões sociais e políticas importantes em suas pátrias e/ou na diáspora. Além disso, concentra-se nesses episódios de indumentária para mostrar que a construção identitária dos personagens principais desses romances intrinsecamente se entrelaça às circunstâncias socioeconômicas, políticas, culturais, religiosas e psicológicas.
Um outro amor: uma leitura de Amor de Clarice, de Rui Torres
Authors: Rocha Rejane Cristina
Published: April 2019

A leitura de Amor de Clarice, de Rui Torres, impõe pelo menos dois constrangimentos à análise crítica. Um deles relaciona-se com o fato de que a peça submete a leitura, desde o título, à estética clariceana, quando elege como ponto de partida da criação o conto de Clarice Lispector, publicado em Laços de família, em 1960. O outro, diz respeito às dificuldades que a criação digital impõe à leitura literária, no que diz respeito a sua formalização material, e que exige mecanismos de análise atentos à configuração hipertextual, bem como à convivência da linguagem verbal com outras linguagens. Este ensaio parte do pressuposto de que ambos os constrangimentos podem ser elaborados criticamente e usados como ferramentas de análise: os significados consolidados do conto de Clarice Lispector podem ser lidos como elementos que ‘desprogramam’ (Machado, 2007) a técnica digital, empregada na formalização material de Amor de Clarice, ao mesmo tempo em que essa formalização material poderia ser identificada como o que possibilita deslocar e ampliar os significados do conto clariceano. A análise do objeto em questão está amparada pelas reflexões de Marku Eskelinen (2012) sobre a intertextualidade no contexto da cibertextualidade e nas de George Landow (1994; 2009), sobre o hipertexto.
A retórica do trágico em o remorso de baltazar serapião
Authors: Alvarez Aurora Gedra Ruiz
Published: April 2019

A partir das elaborações teóricas de Aristóteles sobre a tragédia, discute-se neste estudo o conceito de trágico, tendo como aporte teórico Peter Szondi. Para este autor, o trágico é compreendido sob o enfoque filosófico que se manifesta em consonância com uma determinada cultura e um certo tempo. À luz deste pressuposto teórico e de contribuições de outros estudiosos sobre esse tema, examina-se como a linguagem, particularmente a antítese e o oximoro, enforma uma percepção de mundo trágica no discurso do protagonista de o remorso de baltazar serapião de Valter Hugo Mãe, que efeitos de sentido esses recursos estilísticos produzem nessa configuração e que olhar sobre si e sobre o mundo a personagem apresenta no romance.
Optimization of Lead Adsorption on Rice-Husk Supported Zerovalent Iron Nanoparticles Using Response Surface Methodology
Authors: Olalekan Abiodun Paul , Fakinle Bamidele Sunday , Dada Adewunmi Oluwasogo , Akpor Oghenerobo Benjamin , Oribayo Oluwasola
Published: April 2019

In this study, the Pb(II) ions adsorption unto nanoscale zerovalent iron particles (nZVI) supported on rice husk has been carried out. The challenge of nanoparticles agglomeration makes immobilising them on rice husk desirable. Optimization of process parameters, pH (4 – 10), adsorbent dose (0.5 – 2.0 g) and contact time (60 – 300 min), was carried out using response surface methodology (RSM) based on Box-Behnken design. Optimum condition for maximum Pb(II) ions of 98.74% was predicted at contact time of 60.12 min, pH of 4.01 and adsorbent dose of 0.5 g. At these optimized conditions, 97.23% removal was achieved experimentally. Analysis of variance carried out on the experimental data showed that the model was significant with a R2 of 0.9883. The synthesised adsorbent was characterized with Fourier transform-infrared spectroscopy (FTIR) and scanning electron microscopy (SEM). The SEM showed that RH-nZVI has a very porous surface structure. Amine, carboxyl and hydroxyl groups were some of the identified functional groups present in the adsorbent for adsorption. This study suggests that nZVI supported on rice husk is a viable low-cost adsorbent for removing Pb(II) ions from wastewater.
Organic/Inorganic Nanocomposite for Enhancement of H2S Gas Sensor
Authors: Ibrahim Isam M. , Sharhan Shahad Issam
Published: April 2019

This work presents improvement of H2S gas sensing capability by introducing TiO2 in conductive polymer namely “MEH-PPV”. Firstly, the organic conjugated polymer poly ( 2-methoxy-5- ( 2'-ethythexyloxy) - 1,4-phenlenevinylene) and TiO2 was dissolved in chloroform solvent. The two solutions “MEH-PPV” and TiO2 were mixed in a volume ratio of (0.002 and 0.008) respectively and spin-coated on Si substrate for realizing facile and low-cost sensors. The X-Ray diffraction spectrum of (MEH-PPV/TiO2) nanocomposite thin films was studied, all the pattern showed that the structure is amorphous. The morphology was demonstrated by Field Emission Scanning Electron Microscope (FESEM) images for MEH-PPV and MEH-PPV/TiO2 films which shows formed anano flower like structure with introduces of TiO2All films were examined by Atomic Force Microscope (AFM) which revealed the average roughness increment from 0.204 to 1.25 nm with increase the mixed rate of TiO2. The “MEH-PPV/TiO2” based sensors also shown noticeable responses when the sensors exposure to H2S gas at the concentration of 25ppm. The maximum sensitivity for MEH-PPV/(0.008) TiO2 was 528.1 at operating temperature at 100°C, whereas the response and recovery time was ~ 21.5 s and ~3.8 s, respectively.