1,306 research outputs found
Star-forming galaxies at very high redshifts
Analysis of the deepest available images of the sky, obtained by the Hubble
Space Telescope, reveals a large number of candidate high-redshift galaxies. A
catalogue of 1,683 objects is presented, with estimated redshifts ranging from
to . The high-redshift objects are interpreted as regions of star
formation associated with the progenitors of present-day normal galaxies at
epochs reaching to 95\% of the time to the Big Bang.Comment: 10 pages, LaTeX type, aaspp4.sty macro provided. Supplementary
information, including the full catalog, plots of spectra and redshift
likelihood functions for all the objects, and composite spectra, are
available at ftp://ftp.ess.sunysb.edu/pub/hd
Los programas de case management. Conceptos básicos y aplicabilidad.
Se revisa el origen, motivación y definición de los programas de case management desarrollados, sobre todo, en los Estados Unidos de América. Se enumeran los diversos modelos de estos programas, los principios en que diversos autores lo fundamentan y las actividades que en ellos se desarrollan, así como los aspectos de personal que conllevan. Se discuten diversas apreciaciones sobre su eficacia y la posibilidad de su puesta en marcha en un contexto diferente al que los originó, en Europa del sur
Los programas de case management. Conceptos básicos y aplicabilidad.
Se revisa el origen, motivación y definición de los programas de case management desarrollados, sobre todo, en los Estados Unidos de América. Se enumeran los diversos modelos de estos programas, los principios en que diversos autores lo fundamentan y las actividades que en ellos se desarrollan, así como los aspectos de personal que conllevan. Se discuten diversas apreciaciones sobre su eficacia y la posibilidad de su puesta en marcha en un contexto diferente al que los originó, en Europa del sur
OCP3 is an important modulator of NPR1-mediated jasmonic acid-dependent induced defenses in Arabidopsis
<p>Abstract</p> <p>Background</p> <p>Upon appropriate stimulation, plants increase their level of resistance against future pathogen attack. This phenomenon, known as induced resistance, presents an adaptive advantage due to its reduced fitness costs and its systemic and broad-spectrum nature. In <it>Arabidopsis</it>, different types of induced resistance have been defined based on the signaling pathways involved, particularly those dependent on salicylic acid (SA) and/or jasmonic acid (JA).</p> <p>Results</p> <p>Here, we have assessed the implication of the transcriptional regulator OCP3 in SA- and JA-dependent induced defenses. Through a series of double mutant analyses, we conclude that SA-dependent defense signaling does not require OCP3. However, we found that <it>ocp3 </it>plants are impaired in a <it>Pseudomonas fluorescens </it>WCS417r-triggered induced systemic resistance (ISR) against both <it>Pseudomonas syrinagae </it>DC3000 and <it>Hyaloperonospora arabidopsidis</it>, and we show that this impairment is not due to a defect in JA-perception. Likewise, exogenous application of JA failed to induce defenses in <it>ocp3 </it>plants. In addition, we provide evidence showing that the over-expression of an engineered cytosolic isoform of the disease resistance regulator NPR1 restores the impaired JA-induced disease resistance in <it>ocp3 </it>plants.</p> <p>Conclusions</p> <p>Our findings point to a model in which OCP3 may modulate the nucleocytosolic function of NPR1 in the regulation of JA-dependent induced defense responses.</p
Relearning the lesson – amelanotic malignant melanoma: a case report
Although not as common as the other melanomas, amelanotic melanoma often evades diagnosis by masquerading as other pathology. A high index of suspicion is therefore required for early and appropriate intervention. We present a patient who was diagnosed and managed as having paronychia of the middle finger while in actual fact he had a subungual amelanotic melanoma. By the time of his referral to the orthopaedic team it had progressed to an advanced stage. Our case underlies the importance of early recognition and referral of this rare but malignant lesion by primary care physicians
Metastable Vacua in Superconformal SQCD-like Theories
We study dynamical supersymmetry breaking in vector-like superconformal N=1
gauge theories. We find appropriate deformations of the superpotential to
overcome the problem of the instability of the non supersymmetric vacuum. The
request for long lifetime translates into constraints on the physical couplings
which in this regime can be controlled through efficient RG analysis.Comment: 17 pages, 7 figures, JHEP3.cl
The imprint of global climate cycles in the Fuentillejo maar-lake record during the last 50 ka cal BP (central Spain)
We have analysed the geochemical (element analysis), mineralogical and sedimentary facies to characterize the sedimentary record in Fuentillejo maar-lake in the central Spanish volcanic field of Campo de Calatrava and thus be able to reconstruct the cyclicity of the sedimentary and paleoclimatic processes involved. The upper 20 m of core FUENT-1 show variations in clastic input and water chemistry in the lake throughout the last 50 ka cal BP. Being a closed system, the water level in this maar-lake depends primarily on the balance between precipitation and evaporatio
Feigenbaum graphs: a complex network perspective of chaos
The recently formulated theory of horizontal visibility graphs transforms
time series into graphs and allows the possibility of studying dynamical
systems through the characterization of their associated networks. This method
leads to a natural graph-theoretical description of nonlinear systems with
qualities in the spirit of symbolic dynamics. We support our claim via the case
study of the period-doubling and band-splitting attractor cascades that
characterize unimodal maps. We provide a universal analytical description of
this classic scenario in terms of the horizontal visibility graphs associated
with the dynamics within the attractors, that we call Feigenbaum graphs,
independent of map nonlinearity or other particulars. We derive exact results
for their degree distribution and related quantities, recast them in the
context of the renormalization group and find that its fixed points coincide
with those of network entropy optimization. Furthermore, we show that the
network entropy mimics the Lyapunov exponent of the map independently of its
sign, hinting at a Pesin-like relation equally valid out of chaos.Comment: Published in PLoS ONE (Sep 2011
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