275 research outputs found
From burden to treasure? The role of retrieval practice in journal-writing. In N. Udvardi-Lakos und T. Endres (Chairs), Current developments for learning journals as approach to foster effective learning strategy use and complex learning
No full textRoensch A, Berthold K, Kubik V. From burden to treasure? The role of retrieval practice in journal-writing. In N. Udvardi-Lakos und T. Endres (Chairs), Current developments for learning journals as approach to foster effective learning strategy use and complex learning. Presented at the 20. Tagung der Fachgruppe Pädagogische Psychologie, Jena, Germany
Progressive specification rather than intercalation of segments during limb regeneration
No full textAn amputated salamander limb regenerates the correct number of segments. Models explaining limb regeneration were largely distinct from those for limb development, despite the presence of common patterning molecules. Intercalation has been an important concept to explain salamander limb regeneration, but clear evidence supporting or refuting this model was lacking. In the intercalation model, the first blastema cells acquire fingertip identity, creating a gap in positional identity that triggers regeneration of the intervening region from the stump. We used HOXA protein analysis and transplantation assays to show that axolotl limb blastema cells acquire positional identity in a proximal-to-distal sequence. Therefore, intercalation is not the primary mechanism for segment formation during limb regeneration in this animal. Patterning in development and regeneration uses similar mechanisms.Fil: Roensch, Kathleen. Technische Universität Dresden; Alemania. Max Planck Institute of Molecular Cell Biology and Genetics; AlemaniaFil: Tazaky, Akira. Technische Universität Dresden; Alemania. Max Planck Institute of Molecular Cell Biology and Genetics; AlemaniaFil: Chara, Osvaldo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Física de Líquidos y Sistemas Biológicos. Universidad Nacional de La Plata. Facultad de Ciencias Exactas. Instituto de Física de Líquidos y Sistemas Biológicos; Argentina. Technische Universität Dresden; AlemaniaFil: Tanaka, Elly M.. Technische Universität Dresden; Alemania. Max Planck Institute of Molecular Cell Biology and Genetics; Alemani
Women writing women's lives: Religious texts by medieval German women writers (1100--1475).
No full textThis dissertation contributes to the current discussion on the influence of genre on gender representation by focusing on various idealized feminine forms found in texts authored by medieval German religious women from 1100 to 1475. The texts (generally) fall into three genres---the vision cycle, the sister-book (Nonnenbuch), and the personal revelation---which together form a textual family of interrelated genres. Each genre limits the types of figures which can be included. Vision cycles focus on salvation history and present the idealized feminine and masculine figures involved in divine narrative. The Nonnenbucher, which present an exceptional history of cloistered spirituality, record episodic vitae of perfected predecessors; ideals are expressed at the human level as attainable models for imitation. In the personal revelations, the female author herself becomes a pattern for imitation as she records her process of becoming extraordinary. This sequence accords with a temporal shift in the representation of feminine ideals, from divine to human, from static to dynamic, and parallels representations in the visual arts. In the process of imitating and manipulating the various representations of feminine ideals, the authors alter both the ideals and the genres. In Hildegard von Bingen's vision cycle, she modifies the traditional binary representation of Eve and Mary. The authors of the sister-books adapt exemplary characteristics normally accorded to religious men to fit the cloistered life of Dominican nuns. The authors of the personal revelations employ external ideals as models for their own lives, record the events of their lives according to their chosen model, yet also adapt the pattern to accord with their personal circumstances. This research furthers modern understanding of the complexity of medieval gender ideals, by demonstrating that there were several ideals available to religious women, that the selected genres influenced how these ideals were represented, and that the women were actively involved in the transmission and transformation of literary forms. That such variety could exist within an interrelated group of texts and assigned to a small proportion of the female population has broad implications for studies in genre and gender in all literary periods.PhDGerman literatureLanguage, Literature and LinguisticsMedieval literatureSocial SciencesWomen's studiesUniversity of Michigan, Horace H. Rackham School of Graduate Studieshttp://deepblue.lib.umich.edu/bitstream/2027.42/132138/2/9959763.pd
Measurement of CP Violation Observables in D+ →K−K+π+ Decays
No full textA search for violation of the charge-parity (CP) symmetry in the D+→K-K+π+ decay is presented, with proton-proton collision data corresponding to an integrated luminosity of 5.4 fb-1, collected at a center-of-mass energy of 13 TeV with the LHCb detector. A novel model-independent technique is used to compare the D+ and D- phase-space distributions, with instrumental asymmetries subtracted using the Ds+→K-K+π+ decay as a control channel. The p value for the hypothesis of CP conservation is 8.1%. The CP asymmetry observables ACP|Sφπ+=(0.95±0.43stat±0.26syst)×10-3 and ACP|SK̄∗0K+=(-0.26±0.56stat±0.18syst)×10-3 are also measured. These results show no evidence of CP violation and represent the most sensitive search performed through the phase space of a multibody decay
Measurement of CP violation observables in D+ → K−K+π+ decays
No full textA search for violation of the charge-parity (CP) symmetry in the D+ → K−K+π+ decay is presented,
with proton-proton collision data corresponding to an integrated luminosity of 5.4 fb−1, collected
at a center-of-mass energy of 13 TeV with the LHCb detector. A novel model-independent technique is used to compare the D+ and D− phase-space distributions, with instrumental asymmetries
subtracted using the D+
s → K−K+π+ decay as a control channel. The p value for the hypothesis of CP
conservation is 8.1%. The CP asymmetry observables Aϕπ+
CPjS = (0.95 ± 0.43stat ± 0.26syst) × 10−3 and
AK¯ 0K+
CPjS = (−0.26 ± 0.56stat ± 0.18syst) × 10−3 are also measured. These results show no evidence of CP
violation and represent the most sensitive search performed through the phase space of a multibody decay
Search for D0 meson decays to π+π-e+e- and K+K-e+e- final states
No full textA search for D0 meson decays to the π+π-e+e- and K+K-e+e- final states is reported using a sample of proton-proton collisions collected by the LHCb experiment at a center-of-mass energy of 13 TeV, corresponding to an integrated luminosity of 6 fb-1. The decay D0→π+π-e+e- is observed for the first time when requiring that the two electrons are consistent with coming from the decay of a φ or ρ0/ω meson. The corresponding branching fractions are measured relative to the D0→K-π-[e+e-]ρ0/ω decay, where the two electrons are consistent with coming from the decay of a ρ0 or ω meson. No evidence is found for the D0→K+K-e+e- decay and world-best limits are set on its branching fraction. The results are compared to, and found to be consistent with, the branching fractions of the D0→π+π-μ+μ- and D0→K+K-μ+μ- decays recently measured by LHCb and confirm lepton universality at the current precision
Search for D0 meson decays to π+π-e+e- and K+K-e+e- final states
No full textA search for D0 meson decays to the π+π-e+e- and K+K-e+e- final states is reported using a sample of proton-proton collisions collected by the LHCb experiment at a center-of-mass energy of 13 TeV, corresponding to an integrated luminosity of 6 fb-1. The decay D0→π+π-e+e- is observed for the first time when requiring that the two electrons are consistent with coming from the decay of a φ or ρ0/ω meson. The corresponding branching fractions are measured relative to the D0→K-π-[e+e-]ρ0/ω decay, where the two electrons are consistent with coming from the decay of a ρ0 or ω meson. No evidence is found for the D0→K+K-e+e- decay and world-best limits are set on its branching fraction. The results are compared to, and found to be consistent with, the branching fractions of the D0→π+π-μ+μ- and D0→K+K-μ+μ- decays recently measured by LHCb and confirm lepton universality at the current precision
Study of light-meson resonances decaying to K S0 Kπ in the B → (K S0 Kπ)K channels
No full textA study is presented of B+→KS0K-π+K+ and B+→KS0K+π-K+ decays based on the analysis of proton-proton collision data collected with the LHCb detector at center-of-mass energies of 7, 8 and 13 TeV, corresponding to an integrated luminosity of 9 fb-1. The KS0Kπ invariant-mass distributions of both B+ decay modes show, in the m(KS0Kπ)<1.85 GeV mass region, large activity which is resolved using an amplitude analysis. A simple model, where JPC amplitudes are described by multiple Breit-Wigner functions with appropriate angular distributions, provides a good description of the experimental data. In this approach a complex mixture of JPC=0-+, 1++ and 1+- amplitudes is observed that is dominated by η(1405), η(1470), η(1760), f1(1285), f1(1420) and h1(1405) resonances. The KS0Kπ Dalitz plots are dominated by asymmetric crossing K∗K̄ bands which are different for the two B+ decay modes. This is due to a different interference pattern between the 1++ and 1+- amplitudes in the two channels. Branching fractions are measured for each resonant contribution
Amplitude analysis of B+ → ψ(2S)K+π+π− decays
No full textThe first full amplitude analysis of B+ → ψ(2S)K+π+π− decays is performed using proton-proton collision data corresponding to an integrated luminosity of 9 fb−1 recorded with the LHCb detector. The rich K+π+π− spectrum is studied and the branching fractions of the resonant substructure associated with the prominent K1(1270)+ contribution are measured. The data cannot be described by conventional strange and charmonium resonances only. An amplitude model with 53 components is developed comprising 11 hidden-charm exotic hadrons. New production mechanisms for charged charmonium-like states are observed. Significant resonant activity with spin-parity JP = 1+ in the ψ(2S)π+ system is confirmed and a multi-pole structure is demonstrated. The spectral decomposition of the ψ(2S)π+π− invariant-mass structure, dominated by X0 → ψ(2S)ρ(770)0 decays, broadly resembles the J/ψϕ spectrum observed in B+ → J/ψϕK+ decays. Exotic ψ(2S)K+π− resonances are observed for the first time
Amplitude analysis of B+ → ψ(2S)K+π+π− decays
No full textThe first full amplitude analysis of B+ → ψ(2S)K+π+π− decays is performed using proton-proton collision data corresponding to an integrated luminosity of 9 fb−1 recorded with the LHCb detector. The rich K+π+π− spectrum is studied and the branching fractions of the resonant substructure associated with the prominent K1(1270)+ contribution are measured. The data cannot be described by conventional strange and charmonium resonances only. An amplitude model with 53 components is developed comprising 11 hidden-charm exotic hadrons. New production mechanisms for charged charmonium-like states are observed. Significant resonant activity with spin-parity JP = 1+ in the ψ(2S)π+ system is confirmed and a multi-pole structure is demonstrated. The spectral decomposition of the ψ(2S)π+π− invariant-mass structure, dominated by X0 → ψ(2S)ρ(770)0 decays, broadly resembles the J/ψφ spectrum observed in B+ → J/ψφK+ decays. Exotic ψ(2S)K+π− resonances are observed for the first time
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