Unerwünschte Erzählungen : zur Dialektik des Erzählens und Nicht-Erzählens im Engelsjahr

Große Erzählungen im Engelsjahr 2020 handeln von der Textilindustrie gestern und heute. Die vorliegenden kleinen Erzählungen spielen in anderen textilen Welten und jenseits der großen Fabriken. Von ihnen erzählt Friedrich Engels nicht. Dem Erzählten und Nicht-Erzählten auf der Spur finden wir schließlich heraus, dass auch zu Friedrich Engels selbst in einer bestimmten Weise erzählt - und nicht erzählt wird

Unerwünschte Erzählungen: zur Dialektik des Erzählens und Nicht-Erzählens im Engelsjahr

Große Erzählungen im Engelsjahr 2020 handeln von der Textilindustrie gestern und heute. Die vorliegenden kleinen Erzählungen spielen in anderen textilen Welten und jenseits der großen Fabriken. Von ihnen erzählt Friedrich Engels nicht. Dem Erzählten und Nicht-Erzählten auf der Spur finden wir schließlich heraus, dass auch zu Friedrich Engels selbst in einer bestimmten Weise erzählt - und nicht erzählt wird.Grand narratives in the "Engelsjahr" 2020 are about the textile industry yesterday and today. These little stories are set in other textile worlds and beyond the big factories. Friedrich Engels does not tell of them. Finally, following the track of the narrated and non-narrated, we discover that stories about Friedrich Engels himself are also told - and yet remain untold

The control of translational accuracy is a determinant of healthy ageing in yeast

Life requires the maintenance of molecular function in the face of stochastic processes that tend to adversely affect macromolecular integrity. This is particularly relevant during ageing, as many cellular functions decline with age, including growth, mitochondrial function and energy metabolism. Protein synthesis must deliver functional proteins at all times, implying that the effects of protein synthesis errors like amino acid misincorporation and stop-codon read-through must be minimized during ageing. Here we show that loss of translational accuracy accelerates the loss of viability in stationary phase yeast. Since reduced translational accuracy also reduces the folding competence of at least some proteins, we hypothesize that negative interactions between translational errors and age-related protein damage together overwhelm the cellular chaperone network. We further show that multiple cellular signalling networks control basal error rates in yeast cells, including a ROS signal controlled by mitochondrial activity, and the Ras pathway. Together, our findings indicate that signalling pathways regulating growth, protein homeostasis and energy metabolism may jointly safeguard accurate protein synthesis during healthy ageing

Comparative AMS radiocarbon dating of pretreated versus non-pretreated tropical wood samples

Author Posting. © The Author(s), 2009. This is the author's version of the work. It is posted here by permission of Elsevier B.V. for personal use, not for redistribution. The definitive version was published in Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms 268 (2010): 910-913, doi:10.1016/j.nimb.2009.10.062.Several wood samples collected from Dorslandboom, a large African baobab (Adansonia digitata L.) from Namibia, were investigated by AMS radiocarbon dating subsequent to pretreatment and, alternatively, without pretreatment. The comparative statistical evaluation of results showed that there were no significant differences between fraction modern values and radiocarbon dates of the samples analyzed after pretreatment and without pretreatment, respectively. The radiocarbon date of the oldest sample was 993 ± 20 BP. Dating results also revealed that Dorslandboom is a multi-generation tree, with several stems showing different ages.This material is based on work supported by U.S. National Science Foundation under Cooperative Agreement OCE-022828996. Part of the research was supported by grants from the Romanian Academy and the Romanian National University Research Council (PN II – ID 2354) and also by Nova Research Inc

Measuring the Quantum State of a Large Angular Momentum

We demonstrate a general method to measure the quantum state of an angular momentum of arbitrary magnitude. The (2F+1) x (2F+1) density matrix is completely determined from a set of Stern-Gerlach measurements with (4F+1) different orientations of the quantization axis. We implement the protocol for laser cooled Cesium atoms in the 6S_{1/2}(F=4) hyperfine ground state and apply it to a variety of test states prepared by optical pumping and Larmor precession. A comparison of input and measured states shows typical reconstruction fidelities of about 0.95.Comment: 4 pages, 6 figures, submitted to PR

Conocimientos y habilidades mínimas, que un estudiante egresado de la carrera de Eduación Física, debiera poseer

Tesis (Profesor de Educación Física para la Enseñanza Básica, Licenciado en Educación)La siguiente investigación es llevada a cabo durante el segundo semestre del año 2017, para el seminario de grado de la carrera de Educación Física de la Universidad Andrés Bello. Se realiza un estudio respecto a los conocimientos o saber y a las habilidades o saber hacer mínimos que debe tener un egresado de la Carrera de Educación Física, esto considerando la opinión de una muestra de estudiantes de último año de dicha carrera. Para que la información sea lo más representativa posible se consultó a estudiantes de la Universidad Católica Silva Henríquez, Universidad Metropolitana de la Ciencias de la Educación (UMCE), Universidad SEK y la Universidad Andrés Bello (UNAB). Se asume que la aludida representatividad es parcial, sin embargo y tal como se explica en la viabilidad del estudio, los permisos y accesos a Instituciones de educación Superior es compleja. El instrumento utilizado fue una encuesta tipo cuestionario que permitió recabar los datos necesarios en breve tiempo. La confección de dicho instrumento estuvo a cargo de los propios tesistas y fue validado a través de tres expertos. El estudio se enmarca dentro las exigencias que se están instalando en la Formación Inicial Docente (FID), así como también, en los procesos de evaluación de los docentes y su formación continua. Todo ello en un marco regulatorio que propicia la Ley de Carrera Docente, (2016)

Multiphoton Quantum Optics and Quantum State Engineering

We present a review of theoretical and experimental aspects of multiphoton quantum optics. Multiphoton processes occur and are important for many aspects of matter-radiation interactions that include the efficient ionization of atoms and molecules, and, more generally, atomic transition mechanisms; system-environment couplings and dissipative quantum dynamics; laser physics, optical parametric processes, and interferometry. A single review cannot account for all aspects of such an enormously vast subject. Here we choose to concentrate our attention on parametric processes in nonlinear media, with special emphasis on the engineering of nonclassical states of photons and atoms. We present a detailed analysis of the methods and techniques for the production of genuinely quantum multiphoton processes in nonlinear media, and the corresponding models of multiphoton effective interactions. We review existing proposals for the classification, engineering, and manipulation of nonclassical states, including Fock states, macroscopic superposition states, and multiphoton generalized coherent states. We introduce and discuss the structure of canonical multiphoton quantum optics and the associated one- and two-mode canonical multiphoton squeezed states. This framework provides a consistent multiphoton generalization of two-photon quantum optics and a consistent Hamiltonian description of multiphoton processes associated to higher-order nonlinearities. Finally, we discuss very recent advances that by combining linear and nonlinear optical devices allow to realize multiphoton entangled states of the electromnagnetic field, that are relevant for applications to efficient quantum computation, quantum teleportation, and related problems in quantum communication and information.Comment: 198 pages, 36 eps figure

Bürger ohne Eigenschaften? : Die Weltbürgerbewegung gendersensibel verstehen

Reaktion auf fünf Beiträge zum Thema Klimaschutz als Weltbürgerbewegung in GAIA: A. Brunnengräber (2014), C. Leggewie et al. (2015), S. Bauriedl (2015), B. Unmüßig (2015), D. Mittler (2015)