Neuartiges Hochgeschwindigkeitsfördersystem Palettentransport

In der Intralogistik werden beim Transport von Stückgütern häufig hohe Förderleistungen benötigt. Dabei stehen für den Transport großer Massen bisher nur Systeme zur Verfügung, die einerseits nicht die notwendigen hohen Geschwindigkeiten erreichen und andererseits Zwischenstufen mit Umladeprozessen zur Überwindung von Höhenniveaus erfordern.

Endverbindungen für dynamisch belastete textile Zugmittel

Hochfeste Faserseile sind aufgrund ihrer hohen spezifischen Festigkeit prädestiniert für dynamische Anwendungen in der Fördertechnik. Der Kenntnisstand über die Zeitfestigkeit zugehöriger Endverbindungen zur Krafteinleitung ist jedoch unzureichend. Gegenstand der vorgelegten Arbeit ist die Entwicklung einer für die Anwendung von hochfesten Faserseilen geeigneten Prüfvorschrift sowie die vergleichende Untersuchung bekannter Endverbindungen für hochfeste Faserseile im Zugschwellversuch.

Conversación digital: copresencia y disponibilidad : Estudio pragmático del preámbulo de reuniones multipartitas por videoconferencia

The present thesis explores how interaction is initiated in multi-party meetings in Adobe Connect, 7.0, with a particular focus on how co-presence and mutual availability are established through the preambles of 18 meetings held in Spanish without a moderator. Taking Conversation Analysis (CA) as a methodological point of departure, this thesis comprises four different studies, each of them analyzing a particular phenomenon within the interaction of the preambles in a multimodal environment that allows simultaneous interaction through video, voice and text-chat. The first study (Artículo I) shows how participants solve jointly the issue of availability in a technological environment where being online is not necessarily understood as being available for communicating. The second study (Artículo II) focuses on the beginning of the audiovisual interaction; in particular on how participants check the right functioning of the audiovisual mode. The third study (Artículo III) explores silences within the interaction of the preamble. It shows that the length of gaps and lapses become a significant aspect the preambles and how they are connected to the issue of availability.  Finally, the four study introduces the notion of modal alignment, an interactional phenomenon that systematically appears in the beginnings of the encounters, which seems to be used and understood  as a strategy for the establishment of mutual availability and negotiation of the participation framework. As a whole, this research shows how participants, in order to establish mutual co-presence and availability, adapt to a particular technology in terms of participation management, deploying strategies and conveying successive actions which, as it is the case of the activation of their respective webcams, seem to be understood as predictable within the intricate process of establishing mutual availability before the meeting starts.

Development of a model to predict the life of pneumatic conveyor bends subject to erosive wear

The erosion processes resulting from flow of fluids (gas-solid or liquid-solid) are encountered in nature and many industrial processes. The common feature of these erosion processes is the interaction of the fluid (particle) with its boundary thus resulting in the loss of material from the surface. This type of erosion in detrimental to the equipment used in pneumatic conveying systems. The puncture of pneumatic conveyor bends in industry causes several problems. Some of which are: (1) Escape of the conveyed product causing health and dust hazard; (2) Repairing and cleaning up after punctures necessitates shutting down conveyors, which will affect the operation of the plant, thus reducing profitability. The most common occurrence of process failure in pneumatic conveying systems is when pipe sections at the bends wear away and puncture. The reason for this is particles of varying speed, shape, size and material properties strike the bend wall with greater intensity than in straight sections of the pipe. Currently available models for predicting the lifetime of bends are inaccurate (over predict by 80%. The provision of an accurate predictive method would lead to improvements in the structure of the planned maintenance programmes of processes, thus reducing unplanned shutdowns and ultimately the downtime costs associated with these unplanned shutdowns. This is the main motivation behind the current research. The paper reports on two aspects of the first phases of the study-undertaken for the current project. These are (1) Development and implementation; and (2) Testing of the modelling environment. The model framework encompasses Computational Fluid Dynamics (CFD) related engineering tools, based on Eulerian (gas) and Lagrangian (particle) approaches to represent the two distinct conveyed phases, to predict the lifetime of conveyor bends. The method attempts to account for the effect of erosion on the pipe wall via particle impacts, taking into account the angle of attack, impact velocity, shape/size and material properties of the wall and conveyed material, within a CFD framework. Only a handful of researchers use CFD as the basis of predicting the particle motion, see for example [1-4] . It is hoped that this would lead to more realistic predictions of the wear profile. Results, for two, three-dimensional test cases using the commercially available CFD PHOENICS are presented. These are reported in relation to the impact intensity and sensitivity to the inlet particle distributions.

Adipose-derived stem cell adhesion on laminin-coated microcarriers improves commitment toward the cardiomyogenic lineage

International audience

Albert Camus and Damien Hirst: Always looking on the absurd side of life

The aim of this text is to consider the notions of life and art, revealed in Camus’s texts, mainly The Myth of Sisyphus (published in French in 1942) and The Rebel (1951), and extrapolate them to the present state of contemporary art by analysing a few artworks by Damien Hirst, the richest living artist, a modern Sisyphus in the self-awareness he manifests towards the incongruity of his work. Always looking on the absurd side of life dwells on the inevitability of life and art, accepting the fact, according to Camus’s words, that: the impossible remains impossible. Instead of denying the meaningless and finding some form of redemption, both French writer and British artist have embraced this potential and have used the absurd as a form of conveying meaning to their art. Hirst’s artworks that will be referred in this text include the series: The Physical Impossibility of Death in the Mind of Someone Living (1991); Mother and Child Divided (1993); For the Love of God (2007) and For Heaven’s Sake (2008).

Towards a better understanding of granular material processes: The coupling of a computational fluid dynamics framework with micro-mechanical models

Abstract not available

Mode locking in a spatially extended neuron model: active soma and compartmental tree

Understanding the mode-locked response of excitable systems to periodic forcing has important applications in neuroscience. For example it is known that spatially extended place cells in the hippocampus are driven by the theta rhythm to generate a code conveying information about spatial location. Thus it is important to explore the role of neuronal dendrites in generating the response to periodic current injection. In this paper we pursue this using a compartmental model, with linear dynamics for each compartment, coupled to an active soma model that generates action potentials. By working with the piece-wise linear McKean model for the soma we show how the response of the whole neuron model (soma and dendrites) can be written in closed form. We exploit this to construct a stroboscopic map describing the response of the spatially extended model to periodic forcing. A linear stability analysis of this map, together with a careful treatment of the non-differentiability of the soma model, allows us to construct the Arnol'd tongue structure for 1:q states (one action potential for q cycles of forcing). Importantly we show how the presence of quasi-active membrane in the dendrites can influence the shape of tongues. Direct numerical simulations confirm our theory and further indicate that resonant dendritic membrane can enlarge the windows in parameter space for chaotic behavior. These simulations also show that the spatially extended neuron model responds differently to global as opposed to point forcing. In the former case spatio-temporal patterns of activity within an Arnol'd tongue are standing waves, whilst in the latter they are traveling waves.

Sauvegarde et valorisation du patrimoine culturel immatériel du Sénègal: projet de création d'un écomusée des pratiques divinatoires et curatives

7 RESUME/ABSTRACT Au Sénégal, il existe des pratiques culturelles et cultuelles, séculaires que l’on retrouve au niveau de toutes les composantes ethnolinguistiques. Une donnée qui nous interpelle, chacun en ce qui nous concerne, et nous invite à repenser le devenir de nos spécificités et particularités culturelles face aux assauts répétés et multiformes de la modernité. La caractéristique qui entoure les rites et rituels est le plus souvent sujette à plusieurs formes d’interprétations fantaisistes et parfois dévalorisantes. Force est de reconnaître que le recours à la médecine moderne ne saurait pleinement répondre à ce besoin de tranquillité et de sérénité mystique qui habite chaque africain en général et chaque sénégalais en particulier. Il s’agit ici, pour l’africain et en ce qui nous concerne le sénégalais, de trouver une tranquillité psychologique et une assurance symbolique propres à créer les conditions d’une guérison physique et/ou morale. En ce sens que l’emprise du modernise ne peut aucunement influer totalement sur cette croyance ancestrale que bon nombre de sénégalais, et pas des moindres, ont en l’endroit de ces pratiques. Une prédisposition culturelle sous-tendue par des préoccupations cultuelles qui font l’objet d’une communion agissante entre les différents membres des communautés. Une prise de conscience qui se manifeste à travers des cérémonies ponctuellement organisées et présidées par des prêtres et prêtresses. Notre présente étude participe de la recherche d’un juste équilibre spirituel et temporel apte à offrir une possibilité de concilier les aspects traditionnels des spécificités culturelles de nos composantes ethnolinguistiques avec ce qui constitue les contraintes et exigences de la modernité. Il reste certes évident que cette opposition a généré une sorte de fracture culturelle en véhiculant une autre manière de voir, mais surtout de percevoir nos traditions et coutumes. Cependant à l’heure d’un redimensionnement et d’une adaptation contextuelle de ce qui constitue nos valeurs identitaires, il nous revient de procéder à une démarche de sensibilisation et d’explication pour conférer plus de lisibilité à nos expressions culturelles. La mise en place d’un écomusée des pratiques divinatoires et curatives, est un moyen moderne et pratique de sauvegarde et de valorisation des savoirs et connaissances thérapeutiques endogènes. Outre la création d’emplois et de revenus, cette infrastructure sera une vitrine du patrimoine local qui favorisera le développement d’un tourisme culturel source de devises et vecteur de développement local; ABSTRACT: In Senegal, there are cultural and religious practices, ancient that we find in all the ethno-linguistic components. A given that challenges us, each in our case, and invites us to rethink the future of our cultural specificities and characteristics and multifaceted face of repeated assaults of modernity. The characteristic surrounding the rites and rituals is usually subject to various forms of demeaning and sometimes fanciful interpretations. We must recognize that the use of modern medicine can not fully meet this need of tranquility and mystical serenity that inhabits every African in general and Senegal in particular each. This is, for Africa and for us Senegalese, find a psychological tranquility and symbolic own insurance to create conditions for physical healing and / or legal. In that the grip of modernizing can in no way affect totally on this ancient belief that many Senegalese, not least, have the place of such practices. A cultural predisposition underpinned by cultic concerns that are the subject of an active communion between the community members. An awareness that manifests itself through occasionally organized ceremonies presided over by priests and priestesses. Our present study involved the search for a fair balance spiritual and temporal able to offer an opportunity to reconcile the traditional aspects of the cultural specificities of our ethno-linguistic components with which constitutes the constraints and demands of modernity. While it remains clear that this opposition has generated a kind of cultural divide by conveying a different way of seeing, but above all to collect our traditions and customs. However at the time resizing and contextual adaptation of what constitutes our identity values, it is our responsibility to conduct an outreach approach and explanation to give greater clarity to our cultural expressions. The establishment of a museum of divination and healing practices, is a modern and convenient way to backup and recovery of therapeutic knowledge and endogenous knowledge. In addition to creating jobs and income, this infrastructure will be a showcase of local heritage that promote the development of cultural tourism source of foreign exchange and local development vector.

Theory and language of climate change communication

Climate change communication has become a salient topic in science and society. It has grown to be something like a booming industry alongside more established ‘communication enterprises’, such as health communication, risk communication, and science communication. This article situates the theory of climate change communication within theoretical developments in the field of science communication. It discusses the importance and difficulties inherent in talking about climate change to different types of publics using various types of communication tools and strategies. It engages with the difficult issue of the relationship between climate change communication and behavior change, and it focuses, in particular, on the role of language (metaphors, words, strategies, frames, and narratives) in conveying climate change issues to stakeholders. In the process, it attempts to provide an overview of emerging theories of climate change communication, theories that recently have begun to proliferate quite dramatically. In some cases, we can, therefore only provide signposts to the most relevant research that is being carried out with regard to climate change communication without being able to engage with all its aspects. We end with an assessment of how communication could be improved in light of the theories and practices discussed in this article.

“I haven’t had that much fun since labour.” Subtitling sarco-ironic remarks in Gilmore Girls

The purpose of this study is to explore how the potential cues of spoken sarcasm and irony are transferred into written Finnish subtitles in the American television series Gilmore Girls. The aim is to discover how the use of cuing differs between the English source text and the Finnish target text. The research is conducted through qualitative and quantitative analysis and comparison between the two languages. Three (3) episodes from Gilmore Girls are analysed using the Finnish DVD subtitles and the episodes’ English unofficial transcripts. The sarco-ironic remarks and their translations are identified, and their individual sarco-ironic cues are categorised. The number of cues, the number of cues in each category and the number of cue shifts are compared quantitatively in order to find whether the translator uses less or different cues than the writer of the original source text. The qualitative analysis focuses on the cue types used in both texts. The results confirmed the hypothesis of sarcasm and irony being relatively straightforward linguistic phenomena to translate, and the hypothesis of the category of words of reinforcement/trivialising being the most used in conveying sarcasm and irony. However, the study also showed that even though some cues were cut in the translation process, the sarco-ironic meaning was rarely omitted entirely from the translation. The findings also showed that the number of cue shifts was surprisingly low. From these results we can deduce that at least in the context of DVD subtitles, sarcasm and irony can be conveyed also in writing, and even though some cues were omitted or shifted, sarcasm and irony were still detectable in the Finnish subtitles. The language used in DVD translations uses less cues of sarcasm and irony and it could thus be considered less versatile than the original source language.

Comment expliquer l’absence de conflit religieux dans un pays multiconfessionnel? Cas de l’Albanie

Huntington avait-il raison lorsqu’il déclarait que la religion serait un élément sujet à diviser ? Loin de déclarer qu’il existe une recrudescence de conflits dans le monde, force est de constater que la dimension religieuse dans les conflits est quant à elle sur le devant de la scène. Les cas du Liban, de l’Irlande du Nord ou de l’Ex-Yougoslavie, des cas classiques, illustrent parfaitement cette dimension dans l’exacerbation d’un conflit. Toutefois, ce mémoire tend à expliciter un phénomène particulier ; celui de l’Albanie. Située dans la région des Balkans, un véritable carrefour des religions d’une part et considéré comme un pays multiconfessionnel d’autre part, elle n’a jamais connu de conflit à caractère religieux. Qu’est-ce qui explique que cet État, composé de musulmans, de chrétiens orthodoxes et de catholiques, n’a jamais vu un conflit religieux émerger tandis que ce mulitconfessionnalisme est facteur de conflit chez d’autres ? Nous verrons que l’hypothèse sur laquelle nous nous appuierons est l’absence d’entrepreneurs politique. L’Albanie post-communiste a maintenu la religion séparée du monde politique tout comme ce dernier a évité la prise de parti pris en véhiculant un message de tolérance religieuse.

Effects of modality, urgency and situation on responses to multimodal warnings for drivers

Signifying road-related events with warnings can be highly beneficial, especially when imminent attention is needed. This thesis describes how modality, urgency and situation can influence driver responses to multimodal displays used as warnings. These displays utilise all combinations of audio, visual and tactile modalities, reflecting different urgency levels. In this way, a new rich set of cues is designed, conveying information multimodally, to enhance reactions during driving, which is a highly visual task. The importance of the signified events to driving is reflected in the warnings, and safety-critical or non-critical situations are communicated through the cues. Novel warning designs are considered, using both abstract displays, with no semantic association to the signified event, and language-based ones, using speech. These two cue designs are compared, to discover their strengths and weaknesses as car alerts. The situations in which the new cues are delivered are varied, by simulating both critical and non-critical events and both manual and autonomous car scenarios. A novel set of guidelines for using multimodal driver displays is finally provided, considering the modalities utilised, the urgency signified, and the situation simulated.

Masculinidad y feminidad: ¿De qué estamos hablando?

Recibido 15 de marzo de 2012 • Corregido 04 de octubre de 2012 • Aceptado 07 de noviembre de 2012A continuación se presentan diversas ideas creadas alrededor del tema de la masculinidad y feminidad. El objetivo es esclarecer dichos conceptos desde un punto de vista crítico y de género sensitivo, en un lenguaje sencillo. El fin es que la información sea accesible a una mayor cantidad de personas; eso, sin menoscabar la importancia de transmitir las ideas desde un carácter académico y científico. Por tanto, se busca aclarar el carácter de ambos conceptos en la construcción de su identidad, principalmente para el hombre que cimienta su identidad a partir del rechazo de lo que es femenino. Se trata de mostrar cómo dichas construcciones son atravesadas por diversos mandatos sociales que se expresan según la cultura en la que se desarrollen; además, se plantea el reto de la educación para deconstruir estereotipos ligados a los géneros.

Learning from errors: Psychological, relational, and cultural aspects

Although errors might foster learning, they can also be perceived as something to avoid if they are associated with negative consequences (e.g., receiving a bad grade or being mocked by classmates). Such adverse perceptions may trigger negative emotions and error-avoidance attitudes, limiting the possibility to use errors for learning. These students’ reactions may be influenced by relational and cultural aspects of errors that characterise the learning environment. Accordingly, the main aim of this research was to investigate whether relational and cultural characteristics associated with errors affect psychological mechanisms triggered by making mistakes. In the theoretical part, we described the role of errors in learning using an integrated multilevel (i.e., psychological, relational, and cultural levels of analysis) approach. Then, we presented three studies that analysed how cultural and relational error-related variables affect psychological aspects. The studies adopted a specific empirical methodology (i.e., qualitative, experimental, and correlational) and investigated different samples (i.e., teachers, primary school pupils and middle school students). Findings of study one (cultural level) highlighted errors acquire different meanings that are associated with different teachers’ error-handling strategies (e.g., supporting or penalising errors). Study two (relational level) demonstrated that teachers’ supportive error-handling strategies promote students’ perceptions of being in a positive error climate. Findings of study three (relational and psychological level) showed that positive error climate foster students’ adaptive reactions towards errors and learning outcomes. Overall, our findings indicated that different variables influence students’ learning from errors process and teachers play an important role in conveying specific meanings of errors during learning activities, dealing with students’ mistakes supportively, and establishing an error-friendly classroom environment.