Dynamical beats of short pulses in waveguide QED

We study temporal oscillations, known as dynamical beats, developed by a propagating pulse due to its interaction with a near-resonant collective medium of $^{133}$Cs atoms randomly captured by a nanofiber-based optical lattice. A phenomenological theory provides an intuitive explanation and quantitative predictions, which are improved by an input-output theory considering multiple-scattering between the atoms. The results deepen our understanding of light propagation in waveguide QED, essential in time-frequency analysis and light engineering for probing, manipulating, and exploiting many-body quantum systems

TDAH

Video explicativo sobre el Trastorno por déficit de atención con hiperactividad en niños, el cual busca orientar a padres, docentes, niños sobre los síntomas y posibles tratamientos existentes.Minciencia

Proyecto de emprendimiento social “Cuidando nuestro planeta con Sentido Social”

En este trabajo de grado, se realiza un compilatorio con los aportes y análisis mas relevantes desarrollados durante todo el diplomado, por parte del grupo 6, acompañado de la aplicación de normas apa requeridas, esto con el fin de ilustrar un proyecto de emprendimiento social coherente, realista y rentable, que de la mano del interés por el medio ambiente y la recolección de residuos plásticos como materia prima de todo, genere un bienestar común empresa - comunidad así como crecimiento social y económico para todos los agentes del mercado.In this degree work, a compilation is made with the most relevant contributions and analysis developed throughout the course, by group 6, accompanied by the application of required apa standards, this in order to illustrate a coherent social entrepreneurship project , realistic and profitable, that hand in hand with the interest for the environment and the collection of plastic waste as a raw material for everything, generates a common company-community welfare as well as social and economic growth for all market agents

Nicotine's Defensive Function in Nature

Plants produce metabolites that directly decrease herbivore performance, and as a consequence, herbivores are selected for resistance to these metabolites. To determine whether these metabolites actually function as defenses requires measuring the performance of plants that are altered only in the production of a certain metabolite. To date, the defensive value of most plant resistance traits has not been demonstrated in nature. We transformed native tobacco(Nicotiana attenuata) with a consensus fragment of its two putrescine N-methyl transferase (pmt) genes in either antisense or inverted-repeat (IRpmt) orientations. Only the latter reduced (by greater than 95%) constitutive and inducible nicotine. With D(4)-nicotinic acid (NA), we demonstrate that silencing pmt inhibits nicotine production, while the excess NA dimerizes to form anatabine. Larvae of the nicotine-adapted herbivore Manduca sexta (tobacco hornworm) grew faster and, like the beetle Diabrotica undecimpunctata, preferred IRpmt plants in choice tests. When planted in their native habitat, IRpmt plants were attacked more frequently and, compared to wild-type plants, lost 3-fold more leaf area from a variety of native herbivores, of which the beet armyworm, Spodoptera exigua, and Trimerotropis spp. grasshoppers caused the most damage. These results provide strong evidence that nicotine functions as an efficient defense in nature and highlights the value of transgenic techniques for ecological research