FISH FROM THE PINTUYACU STREAM, ITAYA RIVER BASIN, PERUVIAN AMAZON

El presente trabajo corresponde a un inventario de peces, realizado entre agosto y setiembre del 2019, en tres sitios de muestreo en la quebrada Pintuyacu, tributario de la cuenca del río Itaya, en la Amazonía peruana. En base a 504 individuos analizados, se identificaron 117 especies, correspondientes a 33 familias y 8 órdenes. El orden más diverso fue Characiformes (65 especies, 55.6%), seguido de Siluriformes (31 especies, 26.5%). A nivel de familia Characidae presento la mayor riqueza de especies con 24 especies (20.5%). Las especies más abundantes fueron Stethaprion erythrops (13.1%, 66 individuos), Knodus smithi (13.1%, 66 individuos) y Bujurquina peregrinabunda (6.2%, 31 individuos). Se registraron especies de uso ornamental y de consumo. No se registraron especies amenazadas y la mayoría se clasificaron en preocupación menor (LC), según los criterios de la IUCN. El presente estudio es el primero en presentar una lista de la ictiofauna presente en la quebrada Pintuyacu y consecuentemente el primer inventario publicado para la cuenca del río Itaya. Lo cual pone en evidencia la necesidad de continuar realizando inventarios.The present work corresponds to a fish inventory, carried out between August and September 2019, in three sampling sites in the Pintuyacu stream, a tributary of the Itaya River basin, in the Peruvian Amazon. Based on 504 individuals analyzed, 117 species were identified, corresponding to 33 families and 8 orders. The most diverse order was Characiformes (65 species, 55.6%), followed by Siluriformes (31 species, 26.5%). At the Characidae family level, it presents the highest species richness with 24 species (20.5%). The most abundant species were Stethaprion erythrops (13.1%, 66 individuals), Knodus smithi (13.1%, 66 individuals) and Bujurquina peregrinabunda (6.2%, 31 individuals). Species for ornamental and consumer use were recorded. No threatened species were recorded and most were classified as Least Concern (LC), according to IUCN criteria. The present study is the first to present a list of the ichthyofauna present in the Pintuyacu stream and consequently the first inventory published for the Itaya River basin. Which highlights the need to continue carrying out ichthyological inventories, with the aim of enriching the knowledge of the freshwater ichthyofauna of the country and the Amazon region, as well as applying necessary measures for the conservation of our ichthyological resources

Configuracion, puesta en marcha y aplicaciones de nethserver en GNU/LINUX

El propósito de este proyecto es abordar una problemática a nivel corporativo mediante la implementación práctica del sistema operativo GNU/Linux NethServer. Se inicia desde cero, configurando tanto el sistema de seguridad como la infraestructura de red. El trabajo resaltará el conocimiento adquirido durante el diplomado, abarcando la implementación, configuración y desarrollo del sistema operativo Linux, destacando su gran utilidad en el entorno corporativoThe purpose of this project is to address an issue at the corporate level through the practical implementation of the GNU/Linux NethServer operating system. It starts from scratch, configuring both the security system and the network infrastructure. The work will highlight the knowledge acquired during the diploma course, covering the implementation, configuration and development of the Linux operating system, highlighting its great utility in the corporate environment

Constraints on the χ_(c1) versus χ_(c2) polarizations in proton-proton collisions at √s = 8 TeV

The polarizations of promptly produced χ_(c1) and χ_(c2) mesons are studied using data collected by the CMS experiment at the LHC, in proton-proton collisions at √s=8  TeV. The χ_c states are reconstructed via their radiative decays χ_c → J/ψγ, with the photons being measured through conversions to e⁺e⁻, which allows the two states to be well resolved. The polarizations are measured in the helicity frame, through the analysis of the χ_(c2) to χ_(c1) yield ratio as a function of the polar or azimuthal angle of the positive muon emitted in the J/ψ → μ⁺μ⁻ decay, in three bins of J/ψ transverse momentum. While no differences are seen between the two states in terms of azimuthal decay angle distributions, they are observed to have significantly different polar anisotropies. The measurement favors a scenario where at least one of the two states is strongly polarized along the helicity quantization axis, in agreement with nonrelativistic quantum chromodynamics predictions. This is the first measurement of significantly polarized quarkonia produced at high transverse momentum