173,119 research outputs found
“Mecánica Cuántica Relacional”. El mundo de Rovelli
No full textEl inspirador Relational Quantum Mechanics de Carlo Rovelli cumple varios propósitos de manera simultánea: proporciona una nueva visión de cómo es el mundo de la mecánica cuántica y ofrece un programa para derivar el formalismo de la teoría de un conjunto de postulados simples que pertenecen al procesamiento de la información. En este artículo propongo que nos concentremos totalmente en lo primero, para explorar el mundo de la mecánica cuántica tal como lo representa Rovelli. Es un mundo fascinante, en parte debido a la dependencia de Rovelli sobre el enfoque de la teoría de la información para los fundamentos de la mecánica cuántica, y en parte debido a que su presentación implica asumir una postura en un parte fundamental en la filosofía misma.Carlo Rovelli's inspiring Relational Quantum Mechanics serves several aims at once: it provides a new vision of what the world of quantum mechanics is like, and it offers a program to derive the theory's formalism from a set of simple postulates pertaining to information processing. I propose here to concentrate entirely on the former, to explore the world of quantum mechanics as Rovelli depicts it. It is a fascinating world in part because of Rovelli's reliance on the information theory approach to the foundations of quantum mechanics, and in part because its presentation involves taking sides on a fundamental divides within philosophy itself
John Pechey (1654–1718) and the Popularization of Learned Medicine
No full textThis essay offers a corpus-based linguistic analysis of the paratexts of the works of John Pechey (1654–1718), a licentiate physician and prolificmedical author and popularizer, whose ideas and practice brought him into conflict with the Royal College of Physicians. Following the methodology of corpus-assisted discourse analysis, historical discourse analysis, and historical sociopragmatics, the essay analyses the paratextual material of Pechey’s medical publications, with the aims of (a) collecting a corpus of texts published under his name, (b) assessing his role in the popularization of learned medicine, and (c) tracing how he constructed and performed his identity both as a knowledgeable medical practitioner and as a critic of the beliefs and practices of the Royal College of Physicians
Regularization of the Hamiltonian constraint compatible with the spinfoam dynamics
No full textWe introduce a new regularization for Thiemann's Hamiltonian constraint. The resulting constraint can generate the 1-4 Pachner moves and is therefore more compatible with the dynamics defined by the spinfoam formalism. We calculate its matrix elements and observe the appearance of the 15j Wigner symbol in these
Did Growth and Reforms Increase Citizens’ Support for the Transition?
No full textHow did post-communist transformations affect people’s perceptions of their economic and political systems? We model a pseudo-panel with 89 country-year clusters, based on 13 countries observed between 1991 and 2004, to identify the macro and institutional drivers of the public opinion. Our main findings are: (i) When the economy is growing, on average people appreciate more extensive reforms; they dislike unbalanced reforms. (ii) Worsening of income distribution and higher inflation interact with an increasing share of the private sector in aggravating nostalgia for the past regime. (iii) Cross-country differences in the attitudes towards the present and future (both in the economic and political dimensions) are largely explained by differences in the institutional indicators for the rule of law and corruption. (iv) Cross-country differences in the extent of nostalgia towards the past are mainly related to differences in the deterioration of standards of living.
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