Search results for "FOT"
showing 10 items of 1161 documents
Massive quarks in NLO dipole factorization for DIS : Transverse photon
2022
We calculate the light cone wave functions for the QCD Fock components in a transverse virtual photon necessary for applications at next-to-leading order in the QCD coupling, including quark masses. We present a detailed calculation of both the one loop wave function for the quark-antiquark Fock component and the tree level wave function for the quark-antiquark-gluon Fock component. The quark masses are renormalized in the pole mass scheme, satisfying constraints from the requirement of Lorentz invariance. In particular the quark Pauli form factor at NLO is recovered from the on-shell limit of the quark-antiquark Fock component. We use our result to calculate the next-to-leading order corre…
Merger of dark matter axion clumps and resonant photon emission
2020
A portion of light scalar dark matter, especially axions, may organize into gravitationally bound clumps (stars) and be present in large number in the galaxy today. It is therefore of utmost interest to determine if there are novel observational signatures of this scenario. Work has shown that for moderately large axion-photon couplings, such clumps can undergo parametric resonance into photons, for clumps above a critical mass $M^{\star}_c$ determined precisely by some of us in Ref. [1]. In order to obtain a clump above the critical mass in the galaxy today would require mergers. In this work we perform full 3-dimensional simulations of pairs of axion clumps and determine the conditions un…
Political candidates in infotainment programmes and their emotional effects on Twitter: an analysis of the 2015 Spanish general elections pre-campaig…
2017
[EN] The infotainment format offers candidates an informal setting to show a more personal side of themselves to the electorate, opening themselves up to potential voters. An example of media hybridisation, social networks users can immediately comment on infotainment television programmes, a process known as second screening. These second screeners tend to be especially active in politics. This paper analyses the immediate emotional reaction of these users as they watch infotainment programmes that air during the campaign or pre-campaign seasons and feature political candidates as guests. We have confirmed that second screeners react more emotionally towards the candidate when his or her p…
Simia manu facta: el selfie de Naruto y los márgenes de la creatividad
2019
El presente artículo estudia el selfie del mono Naruto y lo pone en relación con temas de la Historia del Arte como el automatismo de la imagen fotográfica, el tópico clásico ars simia naturae y la creatividad en los tiempos del posthumanismo. El artículo analiza como el selfie realizado por un mono revela una serie de problemas que se han mantenido constantes en la historia del arte y que afecta a aquellas imágenes obtenidas en los márgenes (artísticos, técnicos, sociales o humanos) y su lucha por ser integradas en un canon.
A la deriva entre cartells de cinema: una narrativa personal sobre París
2020
INTRODUCCIÓ. Les ciutats enquadrades des del cinema han construït una cultura visual amb la qual s’identifiquen els seus consumidors; imatges emblemàtiques que configuren una memòria col·lectiva. Però aquestes metròpolis només existeixen en la ficció. La realitat té poc o gens a veure amb aquestes visualitats. En aquesta investigació s’ofereix un relat alternatiu sobre la ciutat de París. MÈTODE. A partir d’una metodologia de recerca basada en l’art, s’empra la deriva com a mètode d’observació i anàlisi crítica de l’entorn urbà. L’objectiu és percebre París d’una manera alternativa a l’imaginari urbà creat pel cinema, a partir de la recerca de cartells de cinema que es troben en aquesta ciu…
Blessed Be the Fruit: Santa Brígida y las resignificaciones religiosas en el referéndum sobre el aborto en Irlanda
2022
La fotografía de Olivia Harris, Blessed Be the Fruit, muestra a santa Brígida de Kildare, patrona de Irlanda, sujetando una pancarta en apoyo a la derogación de la Octava Enmienda de la Constitución de dicho país. Esta performance se inscribe en el clima previo al referéndum que tuvo lugar en 2018 en la República de Irlanda para decidir si se revocaba la ley que prohibía la interrupción voluntaria del embarazo. Esta fotografía y otras manifestaciones artísticas constituyen la base para realizar un estudio sobre la identidad nacional de Irlanda y sobre la figura de santa Brígida, personaje doblemente resignificado: primero por la apropiación del cristianismo, luego por el activismo feminista…
Optogenetic Control of Bacterial Expression by Red Light
2022
In optogenetics, as in nature, sensory photoreceptors serve to control cellular processes by light. Bacteriophytochrome (BphP) photoreceptors sense red and far-red light via a biliverdin chromophore and, in response, cycle between the spectroscopically, structurally, and functionally distinct Pr and Pfr states. BphPs commonly belong to two-component systems that control the phosphorylation of cognate response regulators and downstream gene expression through histidine kinase modules. We recently demonstrated that the paradigm BphP from Deinococcus radiodurans exclusively acts as a phosphatase but that its photosensory module can control the histidine kinase activity of homologous receptors.…
Romas viesnīca: [oriģinālfotogrāfiju albums]
1935
Fotogrāfa vārds reljefā iespiedumā fotogrāfiju apakšējā labajā stūrī, bez datējuma.
Protection by beverages, fruits, vegetables, herbs, and flavonoids against genotoxicity of 2-acetylaminofluorene and 2-amino-1-methyl-6-phenylimidazo…
2002
Abstract Chinese hamster lung fibroblasts, genetically engineered for the expression of rat cytochrome P450 dependent monooxygenase 1A2 and rat sulfotransferase 1C1 (V79-rCYP1A2-rSULT1C1 cells), were utilized to check for possible protective effects of beverages of plant origin, fruits, vegetables, and spices against genotoxicity induced by 2-acetylaminofluorene (AAF) or 2-amino-1-methyl-6-phenylimidazo[4,5-b]pyridine (PhIP). Antigenotoxic activities of juices from spinach and red beets against AAF could be monitored with similar effectivity by the HPRT-mutagenicity test (IC50=0.64%; 2.57%) and alkaline single cell gel electrophoresis (comet assay; IC50=0.12%; 0.89%) which detects DNA stran…
Questioning the Images of Atrocity: An Introduction
2015
The images of atrocity, either analog or digital, are always the trace of an encounter between the gaze of a photographer or a cameraman and a human being suffering from the painful effects of man-made violence. The archive images resulting from such an encounter raise some inevitable questions: who took them and for what purpose? Is it possible to retrace the process that led to these shots? What do they hide behind what the eye can see? Owing to their defective nature and the changes they have endured throughout history, these images strongly contribute to shape collective memory by becoming real sites of memory for ethnic or national communities. Therefore, the archive of human pain, enc…