Search results for "53"
showing 10 items of 2908 documents
Critical reflections on asymptotically safe gravity
2020
Asymptotic safety is a theoretical proposal for the ultraviolet completion of quantum field theories, in particular for quantum gravity. Significant progress on this program has led to a first characterization of the Reuter fixed point. Further advancement in our understanding of the nature of quantum spacetime requires addressing a number of open questions and challenges. Here, we aim at providing a critical reflection on the state of the art in the asymptotic safety program, specifying and elaborating on open questions of both technical and conceptual nature. We also point out systematic pathways, in various stages of practical implementation, towards answering them. Finally, we also take…
Deformation quantization of covariant fields
2002
After sketching recent advances and subtleties in classical relativistically covariant field theories, we give in this short Note some indications as to how the deformation quantization approach can be used to solve or at least give a better understanding of their quantization.
Nonperturbative renormalization and $O(a )$-improvement of the nonsinglet vector current with $N_f = 2 + 1$ Wilson fermions and tree-level Symanzik i…
2019
Physical review / D 99(1), 014519 (2019). doi:10.1103/PhysRevD.99.014519
Symmetry and holonomy in M Theory
2006
Eleven-dimensional M Theory is conjectured to contain and unify quantum gravity and the rest of fundamental interactions. Despite its current lack of a precise formulation, hints and information about M Theory can be retrieved from its low energy limit, eleven-dimensional supergravity. In fact, this Thesis aims to make progress towards the understanding of M Theory by the study of eleven dimensional supergravity. Two important questions in M Theory yet to be solved are 1) how many supersymmetries can an M Theory background preserve and 2) what is the symmetry of M Theory. Both questions are addressed in this Thesis at the D=11 supergravity level.The former question can be studied for purely…
Collins and Sivers asymmetries in muonproduction of pions and kaons off transversely polarised protons
2015
Measurements of the Collins and Sivers asymmetries for charged pions and charged and neutral kaons produced in semi-inclusive deep-inelastic scattering of high energy muons off transversely polarised protons are presented. The results were obtained using all the available COMPASS proton data, which were taken in the years 2007 and 2010. The Collins asymmetries exhibit in the valence region a non-zero signal for pions and there are hints of non-zero signal also for kaons. The Sivers asymmetries are found to be positive for positive pions and kaons and compatible with zero otherwise.
The ATLAS Data Acquisition and High Level Trigger system
2016
Journal of Instrumentation 11(06), P06008 (2016). doi:10.1088/1748-0221/11/06/P06008
Mutant p53 gain of function can be at the root of dedifferentiation of human osteosarcoma MG63 cells into 3AB-OS cancer stem cells
2014
Osteosarcoma is a highly metastatic tumor affecting adolescents, for which there is no second-line chemotherapy. As suggested for most tumors, its capability to overgrow is probably driven by cancer stem cells (CSCs), and finding new targets to kill CSCs may be critical for improving patient survival. TP53 is the most frequently mutated tumor suppressor gene in cancers and mutant p53 protein (mutp53) can acquire gain of function (GOF) strongly contributing to malignancy. Studies thus far have not shown p53-GOF in osteosarcoma. Here, we investigated TP53 gene status/role in 3AB-OS cells-a highly aggressive CSC line previously selected from human osteosarcoma MG63 cells-to evaluate its involv…
Humanismo jurídico tardío en Salamanca
2009
En España es frecuente el retraso en el mundo de las ideas y las ciencias ' casi una constante en los últimos siglos'. En ocasiones se prolongan direcciones o métodos, ya abandonados en otras partes, hasta épocas posteriores, como la escolástica tardía de los siglos XVI y XVII, cuando un conjunto de teólogos cultivan cuestiones del derecho, inspirados en la Summa de santo Tomás y otras tradiciones.
LO íntimo, lo doméstico y lo público: representaciones sociales y estilos de vida en la España ilustrada
2009
[ES] A partir de los textos autobiográficos, correspondencia y otros escritos de diversos personajes vinculados al reformismo ilustrado en la España del siglo xviii, este trabajo estudia los modos en que en sus representaciones de la sociedad y sus imágenes de sí mismos se articulaban los ámbitos de lo íntimo, lo doméstico y lo público, poniendo de relieve las diferencias que este engarce presentaba para hombres y mujeres, tanto en lo social como en lo personal, así como la significativa evolución experimentada a lo largo de los últimos decenios del siglo xvín y en los primeros años del xix.
Historia de las mujeres e historia de la vida privada: confluencias historiográficas
2009
[ES] El interés por los temas de la vida privada y las formas de sociabilidad constituye uno de los rasgos que caracterizan la trayectoria más reciente de la Historia y las Ciencias Sociales. Como es habitual en la configuración de nuevos objetos de análisis histórico, ese interés tiene sus raíces en las transformaciones epistemológicas que las ciencias sociales han experimentado en los últimos decenios, concretamente en las aportaciones de la historiografía feminista, la historia cultural y las orientaciones de la historia social inspiradas en la sociología y la antropología. En este texto se revisan brevemente esas aportaciones y se sintetizan los complejos y variables significados de «pr…