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  • image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
    Authors: Fautrelle, Yves; Allibert, Michel; Etay, Jacqueline; Saadi, B.;

    Colloque avec actes et comité de lecture. Internationale.; International audience; Nous présentons des expériences, utilisant la technique du creuset froid, dans lesquelles des lanthanides, ou d'autres éléments, sont transférés d'une phase saline fluorée vers une phase métallique liquide contenant un agent réducteur tel le Lithium. Du ZrF4 (5 mol%), ou bien du CeF3 (2 mol%), est dissous dans du LiF. Un alliage métallique Sb-Li contenant 5 ou 10 wt % de Lithium, est mis en contact de la phase saline à t = 0. Le taux de transfert est déduit des analyses ICP post mortem effectuées sur des échantillons prélevés dans le métal à pas de temps donnés. La cinétique du transfert est très rapide et dépend de l'agitation électromagnétique.

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    Other literature type . Conference object . 2007
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      Other literature type . Conference object . 2007
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    Authors: Toda, Martine;

    International audience; Both frication noise and vowel formants cue the place of articulation of sibilant fricatives (e.g., /s/ and / / in English).However, only few studies have examined the effect of speaker-specific factors. This acoustic study of sibilant fricatives examines how speaker-specific formant information can improve the distinctness of two phonemic categories of sibilants: /s/ vs. / / in French and /s/ vs. /sj/ in Japanese. The results show that the center of gravity of the frication noise, normalized with respect to the subject-specific coefficient of vowel onset or vowel center formants, provides an appreciable improvement in the sibilant distinctness in Japanese. While the distinctness score of the noise is generally higher in French than in Japanese, the F2 onset patterns (/s/

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    Authors: Hebaz, Salah-Eddine; Lambert, Ambroise; Wilkie-Chancellier, Nicolas; Serfaty, Stéphane; +2 Authors

    International audience Les organismes vivants sont des matériaux complexes, capables d’interagir avec leur environnement. Leurs fonctionnalités et leurs structures internes peuvent être modifiées à différentes échelles par stimulations acoustiques. Elles permettent notamment de renforcer certaines propriétés existantes pour leur conférer de nouvelles capacités. Dans ce contexte, la compréhension des interactions cellules – ondes acoustiques peut devenir un enjeu majeur pour des applications de santé et de nombreux domaines connexes. Ce travail présente un dispositif expérimental développé pour la stimulation acoustique et le suivi non- destructif par ondes ultrasonores de matériaux vivants en culture cellulaire. Ces matériaux sont constitués entités structurales vivantes (cellules et éléments de croissance cellulaire) contenus dans un fluide (milieu de culture). Le dispositif utilise un système de génération d’ondes basses fréquences (20 Hz – 20 kHz), collé au support de culture (une boîte de Pétri). Le suivi des changements des propriétés mécaniques de ce fluide complexe est réalisé par impédancemétrie ultrasonore hautes fréquences (100 kHz – qq MHz). Pour comprendre les interactions ondes-cellules, la propagation des ondes est simulée numériquement dans un premier temps en considérant une boite de Pétri, utilisée en cavité résonante, remplie d’un milieu de culture avec et sans cellules. Une analyse préliminaire temps-fréquence est mise en œuvre expérimentalement pour valider les résultats. Une validation applicative est enfin proposée dans le cadre d’une étude de l’influence de séquences sonores spécifiques sur la synthèse protéique à l’échelle de la cellulaire. Ces expériences sont menées sur une lignée de cellules de cancer ovarien (notée SKOV3), transfectées par un plasmide exprimant une protéine d’adhérence cellulaire (intégrine), couplée à une sonde fluorescente. La comparaison avec des images obtenues par microscopie confocale doit permettre d’évaluer l’efficacité de cette approche.

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    Authors: Anstett, Floriane; Millérioux, Gilles; Bloch, Gérard;

    Depuis 1993, de nombreuses méthodes utilisant des systèmes dynamiques pour masquer une information ont été proposées. Les modèles dynamiques non linéaires peuvent exhiber des comportements complexes et, parmi eux, les comportements chaotiques se distinguent par leur grande sensibilité aux conditions initiales et à la valeur des paramètres du modèle. Ainsi, il est raisonnable de penser que les systèmes chaotiques puissent être utilisés à des fins de cryptage en garantissant des propriétés requises par les cryptosystèmes comme la confusion et la diffusion. L'objectif de cette note est de proposer un schéma original de chiffrement en continu par inclusion mettant à profit des notions de la théorie du contrôle. On aborde en particulier, tout d'abord, le problème de la récupération du texte en clair qui nécessite une synchronisation des séquences des clés dynamiques à l'émission et à la réception. Puis, la cryptanalyse du système de chiffrement par inclusion est évoquée au travers du problème de la reconstruction de la clé.

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    Hyper Article en Ligne; Hal-Diderot
    Other literature type . Conference object . 2005
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      Other literature type . Conference object . 2005
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    Authors: Chadelat, Jean-Marc;

    L'objet de cet article est de proposer une interprétation cohérente de l'une des pièces shakespeariennes les plus problématiques et déroutantes pour la plupart des critiques contemporains. Si la pièce est généralement estimée sur le plan artistique, certains la considérant même comme la plus grande réussite artistique de Shakespeare, les thématiques politiques et idéologiques qu'elle aborde paraissent trop partisanes et polémiques pour valider une approche critique dépassionnée et objective. Cet article s'efforce de montrer qu'au-delà du conflit politique et idéologique sur lequel repose l'intrigue, la construction antithétique du drame et son arrière-plan romain permettent à Shakespeare de mettre en lumière un conflit historique propre à l'époque de sa composition et relatif aux fondements de la politique moderne. Dans la perspective trifonctionnelle mise au jour par George Dumézil pour l'aire culturelle indo-européenne, Shakespeare propose une interprétation de l'histoire de l'Angleterre depuis le Moyen Age jusqu'à l'aube de la modernité au début du XVIIe siècle faisant se succéder un âge théocratique - marqué par la supériorité de l'autorité spirituelle sur le pouvoir temporel et illustré par les pièces historiques anglaises depuis le Roi Jean jusqu'à Richard II - , un âge politique - marqué par une collaboration intéressée du temporel et du spirituel et aboutissant logiquement, dans Henri VIII, à une mise sous tutelle de la fonction religieuse absorbée par le pouvoir monarchique - et, pour finir, un âge économique se caractérisant par une montée en puissance des représentants de la fonction productrice qui revendiquent à leur profit la souveraineté politique et font de la société le moteur du changement. En tant que couronnement dramatique de cette évolution historique, Coriolan illustre la substitution de la fonction productrice à la fonction guerrière au fondement des révolutions modernes et soulève la question particulièrement difficile du sens moral qu'il convient de donner à ces transformations de grande ampleur.

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    Book . 2013
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    https://doi.org/10.4000/books....
    Part of book or chapter of book . 2007 . Peer-reviewed
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      Book . 2013
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      https://doi.org/10.4000/books....
      Part of book or chapter of book . 2007 . Peer-reviewed
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    Authors: Guan, Qianwen;

    International audience; Previous work shows that listeners tend to perceive an illusory vowel inside consonant clusters that are illegal in their native language [1],[2]. But few studies have been concerned with the perception of tones in connection with L2 phonotactics, specifically for L1 speakers of tone languages. This study examines how L1 speakers of a tone language (Mandarin) perceive the clusters of an L2 language without tone (Russian). The issue that we address is how the perception of L2 phonotactics relates to the perception of tones. Some studies of loanwords showed that speakers of languages preferring simple CV syllable structure insert an illusory vowel as well as an illusory tone inside illegal consonant clusters [5], [6]. Our study investigates experimentally the interaction of phonotactic and prosodic adaptation for Mandarin L1. For this purpose we tested the perception of non-native clusters by monolingual Mandarin speakers. The experiment was conducted in Beijing, with 24 participants especially recruited from among monolingual speakers with minimal exposure to a foreign language. The stimuli were non-words produced by a Russian native speaker, containing CC sequences and controls (see table 1). The participants were asked to transcribe each stimulus they heard in Pinyin, including tones. Different types of transcription errors (e.g. epenthesis, metathesis) were observed and analyzed statistically. In this abstract I report only the general result, and I focus on the transcription of tones. The most frequent transcription included vowel epenthesis in the clusters. The illusory vowel is always perceived as short central [ɤ] (akta->akɤta), except after a labial (ipta->iputa). In the controls, the vowel /a/ between clusters is perceived as /a/ when it precedes a stressed syllable (katápa). When it follows a stressed syllable (ákata), it is perceived as central /ɤ/. This response reflects the fact that in Russian, an unstressed vowel preceding stress is less reduced than an unstressed vowel elsewhere in the word [3]. Thus, Mandarin listeners can still perceive a moderately reduced [a] in pre-tonic position, but report a fully reduced vowel in post-tonic position. Of the 24 participants, only 8 could transcribe tones. This is because Pinyin transcription, though commonly used, rarely includes tones. Moreover, the participants do not have more than high school education and do not write regularly. The results of the 8 speakers are summarized and discussed below. Word position and position with respect to stress. In the Russian stimuli, the stressed syllable is realized with an F0 peak. The listeners' responses thus correspond to the low F0 in the pre-stressed syllable, and to the falling F0 on the post-stressed syllable, respectively (fig. 1). Vowel quality. Overall, vowel quality, whether of illusory vowels or of real vowels, does not influence the perception of illusory tones (p>0.05). Consonant type. There is a significant difference of tone perception in relation to phonotactics in initial, pre-stressed clusters. Listeners reported high tone on the illusory vowel significantly more often in stop-stop (e.g., ktápa) than in stop-nasal clusters (p0.05), on a real vowel. In the clusters, where no vowel is actually produced, the audible F0 movement is very fast, rising toward the peak of the stressed vowel. The start of the F0 rise is influenced by the consonant type [4]: after a voiceless stop F0 rises in the following vowel, while after a sonorant stop F0 falls. In the controls (katápa), F0 starts low on the unstressed vowel, and rises into the following stressed syllable. The participants seem to respond to this systematic rise, rather than to the subtler effects of consonant-type.

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    Other literature type . Conference object . 2016
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    Authors: Moussaed, Carine; Wornom, Stephen, F.; Koobus, Bruno; Dervieux, Alain; +4 Authors

    International audience; Flows past bluff bodies show turbulent near wall behavior in various conditions. For example, for a high Reynolds incident flow, the boundary layer at front side of a circular cylinder may show a transition to a turbulent boundary layer. After separation, the back of the cylinder is in contact with the turbulent wake. Analogously, the turbulent wake of a first obstacle can hit the front of a second one.

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    Error processing is an important aspect of learning. The detection and online correction of an error as well as error-based adaptation of subsequent movements enables humans to improve behavior. For this improvement, it is necessary to differentiate between relevant and irrelevant errors. Behavioral adaptations are only reasonable when an error is attributed to one's own behavior and therefore regarded as relevant for subsequent adjustments, whereas irrelevant errors caused by unsystematic external influences should be disregarded. Here, we ask whether error predictions as indexed by the error-related negativity (Ne/ERN) can be used to differentiate relevant and irrelevant errors in movements with a complex visuomotor mapping. Using event-related potentials, we compared the neural activation between relevant (self-induced/internal) errors and irrelevant (externally manipulated) errors in a virtual goal-oriented throwing task. Results show that the Ne/ERN responds more strongly to self-induced errors, while the feedback-related negativity (FRN) more strongly correlates with externally manipulated errors. Moreover, subsequent behavioral adjustments were larger in the relevant compared to the irrelevant error trials. We conclude that predictive processes, marked by the Ne/ERN, can subserve error attribution in naturalistic, complex visuomotor tasks like throwing.

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    Journal of Vision; OpenAPC Global Initiative
    Article . Conference object . 2019 . Peer-reviewed
    License: CC BY NC ND
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      Journal of Vision; OpenAPC Global Initiative
      Article . Conference object . 2019 . Peer-reviewed
      License: CC BY NC ND
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    Authors: Weinberger, Armin; Fischer, Frank; Mandl, Heinz;

    The study investigates collaborative learning of small groups via text-based computer-mediated communication. We analyzed how two approaches to pre-structure communication influence participation, individual knowledge transfer, the convergence of participation and the convergence of knowledge among peers. We varied the factor scripted cooperation and the factor scaffolding in a 2x2-design. 105 university students of Educational Psychology participated. Results show that scripted cooperation was most and scaffolding least beneficial to individual transfer, knowledge convergence and participation in comparison to open discourse.

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    https://doi.org/10.4324/978131...
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      https://doi.org/10.4324/978131...
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    Authors: Cleuziou, Guillaume; Poudat, Céline;

    The massive amount of textual data on the Web raises numerous classification problems. Although the notion of domain is widely acknowledged in the IR field, the applicative concept of genre could solve its weaknesses by taking into account the linguistic properties and the document structures of the texts. Two clustering methods are proposed here to illustrate the complementarity of the notions to characterize a closed scientific article corpus. The results are planned to be used in a Web-based application.

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    http://www.univ-orleans.fr/lif...
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    https://doi.org/10.1007/3-540-...
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  • image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
    Authors: Fautrelle, Yves; Allibert, Michel; Etay, Jacqueline; Saadi, B.;

    Colloque avec actes et comité de lecture. Internationale.; International audience; Nous présentons des expériences, utilisant la technique du creuset froid, dans lesquelles des lanthanides, ou d'autres éléments, sont transférés d'une phase saline fluorée vers une phase métallique liquide contenant un agent réducteur tel le Lithium. Du ZrF4 (5 mol%), ou bien du CeF3 (2 mol%), est dissous dans du LiF. Un alliage métallique Sb-Li contenant 5 ou 10 wt % de Lithium, est mis en contact de la phase saline à t = 0. Le taux de transfert est déduit des analyses ICP post mortem effectuées sur des échantillons prélevés dans le métal à pas de temps donnés. La cinétique du transfert est très rapide et dépend de l'agitation électromagnétique.

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    Authors: Toda, Martine;

    International audience; Both frication noise and vowel formants cue the place of articulation of sibilant fricatives (e.g., /s/ and / / in English).However, only few studies have examined the effect of speaker-specific factors. This acoustic study of sibilant fricatives examines how speaker-specific formant information can improve the distinctness of two phonemic categories of sibilants: /s/ vs. / / in French and /s/ vs. /sj/ in Japanese. The results show that the center of gravity of the frication noise, normalized with respect to the subject-specific coefficient of vowel onset or vowel center formants, provides an appreciable improvement in the sibilant distinctness in Japanese. While the distinctness score of the noise is generally higher in French than in Japanese, the F2 onset patterns (/s/

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    Authors: Hebaz, Salah-Eddine; Lambert, Ambroise; Wilkie-Chancellier, Nicolas; Serfaty, Stéphane; +2 Authors

    International audience Les organismes vivants sont des matériaux complexes, capables d’interagir avec leur environnement. Leurs fonctionnalités et leurs structures internes peuvent être modifiées à différentes échelles par stimulations acoustiques. Elles permettent notamment de renforcer certaines propriétés existantes pour leur conférer de nouvelles capacités. Dans ce contexte, la compréhension des interactions cellules – ondes acoustiques peut devenir un enjeu majeur pour des applications de santé et de nombreux domaines connexes. Ce travail présente un dispositif expérimental développé pour la stimulation acoustique et le suivi non- destructif par ondes ultrasonores de matériaux vivants en culture cellulaire. Ces matériaux sont constitués entités structurales vivantes (cellules et éléments de croissance cellulaire) contenus dans un fluide (milieu de culture). Le dispositif utilise un système de génération d’ondes basses fréquences (20 Hz – 20 kHz), collé au support de culture (une boîte de Pétri). Le suivi des changements des propriétés mécaniques de ce fluide complexe est réalisé par impédancemétrie ultrasonore hautes fréquences (100 kHz – qq MHz). Pour comprendre les interactions ondes-cellules, la propagation des ondes est simulée numériquement dans un premier temps en considérant une boite de Pétri, utilisée en cavité résonante, remplie d’un milieu de culture avec et sans cellules. Une analyse préliminaire temps-fréquence est mise en œuvre expérimentalement pour valider les résultats. Une validation applicative est enfin proposée dans le cadre d’une étude de l’influence de séquences sonores spécifiques sur la synthèse protéique à l’échelle de la cellulaire. Ces expériences sont menées sur une lignée de cellules de cancer ovarien (notée SKOV3), transfectées par un plasmide exprimant une protéine d’adhérence cellulaire (intégrine), couplée à une sonde fluorescente. La comparaison avec des images obtenues par microscopie confocale doit permettre d’évaluer l’efficacité de cette approche.

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    Authors: Anstett, Floriane; Millérioux, Gilles; Bloch, Gérard;

    Depuis 1993, de nombreuses méthodes utilisant des systèmes dynamiques pour masquer une information ont été proposées. Les modèles dynamiques non linéaires peuvent exhiber des comportements complexes et, parmi eux, les comportements chaotiques se distinguent par leur grande sensibilité aux conditions initiales et à la valeur des paramètres du modèle. Ainsi, il est raisonnable de penser que les systèmes chaotiques puissent être utilisés à des fins de cryptage en garantissant des propriétés requises par les cryptosystèmes comme la confusion et la diffusion. L'objectif de cette note est de proposer un schéma original de chiffrement en continu par inclusion mettant à profit des notions de la théorie du contrôle. On aborde en particulier, tout d'abord, le problème de la récupération du texte en clair qui nécessite une synchronisation des séquences des clés dynamiques à l'émission et à la réception. Puis, la cryptanalyse du système de chiffrement par inclusion est évoquée au travers du problème de la reconstruction de la clé.

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    Authors: Chadelat, Jean-Marc;

    L'objet de cet article est de proposer une interprétation cohérente de l'une des pièces shakespeariennes les plus problématiques et déroutantes pour la plupart des critiques contemporains. Si la pièce est généralement estimée sur le plan artistique, certains la considérant même comme la plus grande réussite artistique de Shakespeare, les thématiques politiques et idéologiques qu'elle aborde paraissent trop partisanes et polémiques pour valider une approche critique dépassionnée et objective. Cet article s'efforce de montrer qu'au-delà du conflit politique et idéologique sur lequel repose l'intrigue, la construction antithétique du drame et son arrière-plan romain permettent à Shakespeare de mettre en lumière un conflit historique propre à l'époque de sa composition et relatif aux fondements de la politique moderne. Dans la perspective trifonctionnelle mise au jour par George Dumézil pour l'aire culturelle indo-européenne, Shakespeare propose une interprétation de l'histoire de l'Angleterre depuis le Moyen Age jusqu'à l'aube de la modernité au début du XVIIe siècle faisant se succéder un âge théocratique - marqué par la supériorité de l'autorité spirituelle sur le pouvoir temporel et illustré par les pièces historiques anglaises depuis le Roi Jean jusqu'à Richard II - , un âge politique - marqué par une collaboration intéressée du temporel et du spirituel et aboutissant logiquement, dans Henri VIII, à une mise sous tutelle de la fonction religieuse absorbée par le pouvoir monarchique - et, pour finir, un âge économique se caractérisant par une montée en puissance des représentants de la fonction productrice qui revendiquent à leur profit la souveraineté politique et font de la société le moteur du changement. En tant que couronnement dramatique de cette évolution historique, Coriolan illustre la substitution de la fonction productrice à la fonction guerrière au fondement des révolutions modernes et soulève la question particulièrement difficile du sens moral qu'il convient de donner à ces transformations de grande ampleur.

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    https://doi.org/10.4000/books....
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    Authors: Guan, Qianwen;

    International audience; Previous work shows that listeners tend to perceive an illusory vowel inside consonant clusters that are illegal in their native language [1],[2]. But few studies have been concerned with the perception of tones in connection with L2 phonotactics, specifically for L1 speakers of tone languages. This study examines how L1 speakers of a tone language (Mandarin) perceive the clusters of an L2 language without tone (Russian). The issue that we address is how the perception of L2 phonotactics relates to the perception of tones. Some studies of loanwords showed that speakers of languages preferring simple CV syllable structure insert an illusory vowel as well as an illusory tone inside illegal consonant clusters [5], [6]. Our study investigates experimentally the interaction of phonotactic and prosodic adaptation for Mandarin L1. For this purpose we tested the perception of non-native clusters by monolingual Mandarin speakers. The experiment was conducted in Beijing, with 24 participants especially recruited from among monolingual speakers with minimal exposure to a foreign language. The stimuli were non-words produced by a Russian native speaker, containing CC sequences and controls (see table 1). The participants were asked to transcribe each stimulus they heard in Pinyin, including tones. Different types of transcription errors (e.g. epenthesis, metathesis) were observed and analyzed statistically. In this abstract I report only the general result, and I focus on the transcription of tones. The most frequent transcription included vowel epenthesis in the clusters. The illusory vowel is always perceived as short central [ɤ] (akta->akɤta), except after a labial (ipta->iputa). In the controls, the vowel /a/ between clusters is perceived as /a/ when it precedes a stressed syllable (katápa). When it follows a stressed syllable (ákata), it is perceived as central /ɤ/. This response reflects the fact that in Russian, an unstressed vowel preceding stress is less reduced than an unstressed vowel elsewhere in the word [3]. Thus, Mandarin listeners can still perceive a moderately reduced [a] in pre-tonic position, but report a fully reduced vowel in post-tonic position. Of the 24 participants, only 8 could transcribe tones. This is because Pinyin transcription, though commonly used, rarely includes tones. Moreover, the participants do not have more than high school education and do not write regularly. The results of the 8 speakers are summarized and discussed below. Word position and position with respect to stress. In the Russian stimuli, the stressed syllable is realized with an F0 peak. The listeners' responses thus correspond to the low F0 in the pre-stressed syllable, and to the falling F0 on the post-stressed syllable, respectively (fig. 1). Vowel quality. Overall, vowel quality, whether of illusory vowels or of real vowels, does not influence the perception of illusory tones (p>0.05). Consonant type. There is a significant difference of tone perception in relation to phonotactics in initial, pre-stressed clusters. Listeners reported high tone on the illusory vowel significantly more often in stop-stop (e.g., ktápa) than in stop-nasal clusters (p0.05), on a real vowel. In the clusters, where no vowel is actually produced, the audible F0 movement is very fast, rising toward the peak of the stressed vowel. The start of the F0 rise is influenced by the consonant type [4]: after a voiceless stop F0 rises in the following vowel, while after a sonorant stop F0 falls. In the controls (katápa), F0 starts low on the unstressed vowel, and rises into the following stressed syllable. The participants seem to respond to this systematic rise, rather than to the subtler effects of consonant-type.

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    Other literature type . Conference object . 2016
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      image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/ Mémoires en Sciences...arrow_drop_down
      image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
      image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
      Hyper Article en Ligne; Hal-Diderot
      Other literature type . Conference object . 2016
  • image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/