2,037 research outputs found
Solving the strongly coupled 2D gravity III: String susceptibility and topological N-point functions
We spell out the derivation of novel features, put forward earlier in a
letter, of two dimensional gravity in the strong coupling regime, at ,
13, 19. Within the operator approach previously developed, they neatly follow
from the appearence of a new cosmological term/marginal operator, different
from the standard weak-coupling one, that determines the world sheet
interaction. The corresponding string susceptibility is obtained and found real
contrary to the continuation of the KPZ formula. Strongly coupled (topological
like) models--only involving zero-mode degrees of freedom--are solved up to
sixth order, using the ward identities which follow from the dependence upon
the new cosmological constant. They are technically similar to the weakly
coupled ones, which reproduce the matrix model results, but gravity and matter
quantum numbers are entangled differently.Comment: 21 pages, latex, 10 figure
DĂ©coloniser Kateri Tekakwitha
Forum mondial thĂ©ologie et libĂ©ration, MontrĂ©al, 8 aoĂ»t 2016« Lâhistoire des Autochtones dâAmĂ©rique du Nord nâa jamais vraiment eu les Indiens pour sujet. Ce qui comptait, câĂ©tait bien plus lâhistoire des Blancs, de leurs besoins, de leurs aspirations. » (Thomas King). La version dominante (non-autochtone) de la vie de Kateri, cĂ©lĂ©brĂ©e en 2012, reflĂšte bien cela. Les premiĂšres biographies de Kateri rapportent relativement peu de paroles dâelle. Elles sont Ă©crites par des jĂ©suites, des hommes de lâĂ©lite religieuse française, venant dâun monde profondĂ©ment diffĂ©rent du monde autochtone en gĂ©nĂ©ral et iroquois en particulier. Dans ces biographies, Kateri est tout autant cĂ©lĂ©brĂ©e que rĂ©duite au silence : non seulement parce quâon lui donne peu la parole, mais parce que la dimension iroquoise de son expĂ©rience culturelle et spirituelle est soit dĂ©nigrĂ©e, soit ignorĂ©e. Alors quâon affirme cĂ©lĂ©brer son identitĂ© autochtone, elle est mĂ©connue en tant que femme de culture iroquoise, ce quâelle nâaurait jamais pu cesser dâĂȘtre pourtant. Cela est restĂ© vrai en 2012, au moment mĂȘme oĂč on la cĂ©lĂ©brait comme sainte amĂ©rindienne dâAmĂ©rique du Nord et comme pont entre les cultures.
Kateri est aussi racontĂ©e par ses premiers biographes dâune maniĂšre androcentrique, repĂ©rable de diverses maniĂšres, et qui a Ă©tĂ© rĂ©pĂ©tĂ©e par les biographies jusquâĂ nos jours. Cela nâa Ă©tĂ© ni remarquĂ© ni remis en question au moment de sa canonisation. Rares sont celles et ceux qui lâont perçu. Dans ces conditions, Kateri reste enfermĂ©e dans des reprĂ©sentations coloniales et androcentriques.
De quelles façons la vĂ©nĂ©ration de lâĂglise non autochtone envers Kateri reste-t-elle empreinte de colonialisme et dâandrocentrisme ? Quâest-ce quâon voit Ă©merger si on explore un peu plus lâarriĂšre-fond iroquois de Kateri Tekakwitha ? Quâest-ce que cela impliquerait si on prenait ce monde au sĂ©rieux
DĂ©terminants de la participation Ă une plateforme collaborative
Comprend des rĂ©fĂ©rences bibliographiquesLe projet pilote de site de collaboration mis de lâavant pour les cohortes inscrites au programme de deuxiĂšme cycle en gestion de la formation se veut une façon de permettre aux apprenants dâexpĂ©rimenter cette formule en mode « incubateur ». Il vise Ă accroĂźtre la flexibilitĂ© de lâoffre de formation, Ă assurer une continuitĂ© dans lâexpĂ©rience pĂ©dagogique et Ă favoriser la rĂ©utilisation dâun tel outil en milieu organisationnel. AprĂšs avoir dĂ©crit la problĂ©matique de dĂ©part, nous prĂ©sentons diffĂ©rentes recherches qui nous ont servi de guide dans lâĂ©laboration de cette pratique innovante. Afin de tirer profit de ces recherches portant sur les communautĂ©s de pratique virtuelles, nous avons dâabord mis en place un projet pilote en vue dâeffectuer une analyse en tenant compte des de lâanimation comme variable dĂ©terminante de la participation et du succĂšs
Searching for Learning-Dependent Changes in the Antennal Lobe: Simultaneous Recording of Neural Activity and Aversive Olfactory Learning in Honeybees
Plasticity in the honeybee brain has been studied using the appetitive olfactory conditioning of the proboscis extension reflex, in which a bee learns the association between an odor and a sucrose reward. In this framework, coupling behavioral measurements of proboscis extension and invasive recordings of neural activity has been difficult because proboscis movements usually introduce brain movements that affect physiological preparations. Here we took advantage of a new conditioning protocol, the aversive olfactory conditioning of the sting extension reflex, which does not generate this problem. We achieved the first simultaneous recordings of conditioned sting extension responses and calcium imaging of antennal lobe activity, thus revealing on-line processing of olfactory information during conditioning trials. Based on behavioral output we distinguished learners and non-learners and analyzed possible learning-dependent changes in antennal lobe activity. We did not find differences between glomerular responses to the CS+ and the CSâ in learners. Unexpectedly, we found that during conditioning trials non-learners exhibited a progressive decrease in physiological responses to odors, irrespective of their valence. This effect could neither be attributed to a fitness problem nor to abnormal dye bleaching. We discuss the absence of learning-induced changes in the antennal lobe of learners and the decrease in calcium responses found in non-learners. Further studies will have to extend the search for functional plasticity related to aversive learning to other brain areas and to look on a broader range of temporal scales
A long-term copper exposure on freshwater ecosystem using lotic mesocosms: Individual and population responses of three-spined sticklebacks (Gasterosteus aculeatus)
Three-spined stickleback (Gasterosteus aculeatus) was used as the highest trophic level predator in an outdoor mesocosm study assessing the effect of environmentally realistic copper concentration (0, 5, 25 and 75 ÎŒg Lâ1) over 18 months of continuous exposure. Condition factor, organosomatic indices (HIS, GSI and SSI) as well as copper bioaccumulation in the liver were measured at 15 days, 2, 4, 6, 10, 14 and 18 months after the beginning of the contamination. Population monitoring was realised after 6 and 18 months of contamination, allowing two reproduction periods to be measured. Results showed that condition factor was affected at medium and high copper concentrations and HSI was sporadically affected in all copper exposure, depending on the sex of the fish. GSI did not show any significant differences and SSI was lowered in the medium and high copper levels. Bioaccumulation was significantly different in males and females and fluctuated with season. A negative correlation was observed between copper bioaccumulation in the liver and fish size and a positive correlation with nominal copper concentration in the water was found. There was a negative correlation between condition factor, organosomatic indices and bioaccumulation in the liver. Population monitoring showed a significantly higher fish mean length after 6 months and a higher abundance after 18 months of exposure at the highest copper level. We conclude that indirect effects such as food and habitat availability or lower predation pressure on eggs and juveniles might have led to higher stickleback population abundances at the highest copper level. This highlights the need to study all the trophic levels when monitoring ecosystem health. Considering the population and the individual responses after 18 months of copper exposure, the NOEC for three-spined sticklebacks was 25 ÎŒg Lâ1 (or 20 ÎŒg Lâ1 if we consider the average effective concentration), with a LOEC of 75 ÎŒg Lâ1 (or 57 ÎŒg Lâ1, AEC)
Can clicker use support learning in a dual-focused second language German course?
This study investigated clicker-use impact in a legal German lecture, given to 65 French students of Law in which the learning focus was both language and content. 36 participants who attended the entire course were tested. Upon their introductory session, students took a preliminary two-fold multiple-choice questionnaire involving 16 questions on legal terminology and 16 on course content. Throughout the 10- week semester, the lecturer administered all questions during regular courses. Each weekly session was conducted alternately with or without clickers. Students answered half of the questions about language and content using clickers, whereas the remaining half involved standard conditions with volunteers raising their hands to answer. At the end of their term, students took the same initial questionnaire as a post-test. A quantitative analysis was performed to assess (a) the enhancement of the acquisition of legal terminology and course content through clicker use and (b) the impact of learnersâ pre-test scores on learning gains regarding terminology and content with or without clickers. The clicker group outperformed the non-clicker group with regard to a post-test concerning legal terminology. The findings demonstrate that clicker use alleviates the cognitive load induced by learning both new terminology and content
Extension de l'aire de distribution de la Couleuvre à collier, Diadophis punctatus edwardsii, dans l'est du Québec
Deux Couleuvres Ă collier adulte (Diadophis punctatus edwardsii) ont Ă©tĂ© trouvĂ©es au parc national du Saguenay, dans lâest du QuĂ©bec, en 2004 et 2005. Ces mentions se retrouvent Ă prĂšs 150 kilomĂštres au nord-nord-est de la mention la plus proche de lâespĂšce. Lâhabitat est constituĂ© de forĂȘt mixte prĂšs dâescarpements rocheux, dans des vallĂ©es. Il pourrait sâagir de populations isolĂ©es de celles retrouvĂ©es plus au sud.Two Ringneck Snakes (Diadophis punctatus edwardsii) was found in the Saguenay National Park, in eastern QuĂ©bec, in 2004 and 2005. These records are about 150 kilometers north-north-east from the nearest previous record. The habitat is mixed forest, with rocky cliffs, in valleys. They may represent isolated populations from those found in southern Quebec
From Weak to Strong Coupling in Two-Dimensional Gravity
The strong coupling physics of two dimensional gravity at C=7, 13, 19 is
deciphered, by building up on previous works along the same line (for a recent
review, of the background material, see hep-th/9408069). It is shown that
chirality becomes deconfined. The string suceptibility is derived, and found to
be real contrary to the continuation of the KPZ formula. Topological Liouville
string theories (without transverse degree of freedom) are explicitely solved.
Altough they involve strongly coupled gravity, they share many features with
the standard matrix models.Comment: LPTENS-94/25, Latex file + figure
- âŠ