Prueba de habilidades practicas CCNA.

Prueba de habilidades practicas CCNA.Las telecomunicaciones en el presente han tomado una gran importancia ya que gracias a ellas podemos realizar de forma más rápida y efectiva el intercambio de información como por ejemplo la forma en que se transmite datos en la gran mayoría de empresas en el mundo por medio de las redes LAN y WAN en la misma ciudad, en países diferentes, incluso entre continentes ayudando en el crecimiento y el avance de dichas empresas. Este tipo de redes han sido objeto de nuestro estudio a lo largo de este diplomado en el cual a través de diferentes unidades se fueron adquiriendo los conocimientos básicos para poder administrar estas redes. Nos encontramos ahora en la actividad final en la cual tenemos unos escenarios planteados y se requiere probar las habilidades y conocimientos adquiridos en las diferentes unidades como por ejemplo la configuración básica de los switches, los routers, DHCP, OSPF, NAT, entre otros. Como herramienta importante para desarrollar este tipo de actividades contamos con un software proporcionado por Cisco Packet Tracer en el cual implementaremos las redes solicitadas realizando la respectiva configuración.Telecommunications in the present have taken a great importance because thanks to them we can make faster and more effective the exchange of information such as the way in which data is transmitted in the vast majority of companies in the world through the LAN and WAN networks in the same city, in different countries, even between continents, helping in the growth and advancement of these companies. This type of networks have been the object of our study throughout this course in which, through different units, basic knowledge was acquired in order to administer these networks. We are now in the final activity in which we have some scenarios and requires testing the skills and knowledge acquired in different units such as basic configuration of switches, routers, DHCP, OSPF, NAT, among others. As an important tool to develop this type of activity, we have software provided by Cisco Packet Tracer in which we will implement the requested networks by performing the respective configuration

Narcissus vilchezii una nueva especie (Amaryllidaceae) en Andalucía (España)

Se describe una nueva especie, de origen hibridógeno (nomoespecie) en la provincia de Jaén (Andalucía, España): Narcissus vilchezii P. Gómez & Hervá

APLICACIÓN DE LA CIRUGÍA VIDEOENDOSCÓPICA EN PEDIATRÍA

La videoendoscopía  es una vía de abordaje a la cavidad torácica, abdominal o retroperitoneal que facilita su exploración así como  la realización de procedimientos quirúrgicos por medio de una óptica telescópica adaptada a una microcámara de video. Esta técnica actualmente ha experimentado avances como modalidad de cirugía mínimamente invasiva en los pacientes pediátricos; se conoce y aplica en casi todo el mundo.  Las principales ventajas de este tipo de cirugía son la rápida recuperación postquirúrgica por minimización del dolor postoperatorio, menor restricción en las actividades durante la recuperación, disminución de estancia hospitalaria con regreso más rápido a la actividad habitual, menor costo por hospitalización,  una cicatriz más estética y una mejor visualización del campo operatorio para el cirujano. También tiene riesgos y contraindicaciones que deben ser valorados en cada paciente. &nbsp

Femtosecond XUV–IR induced photodynamics in the methyl iodide cation

The time-resolved photodynamics of the methyl iodide cation (CH3I+) are investigated by means of femtosecond XUV-IR pump-probe spectroscopy. A time-delay-compensated XUV monochromator is employed to isolate a specific harmonic, the 9th harmonic of the fundamental 800 nm (13.95 eV, 88.89 nm), which is used as a pump pulse to prepare the cation in several electronic states. A time-delayed IR probe pulse is used to probe the dissociative dynamics on the first excited state potential energy surface. Photoelectrons and photofragment ions - and I+ - are detected by velocity map imaging. The experimental results are complemented with high level ab initio calculations for the potential energy curves of the electronic states of CH3I+ as well as with full dimension on-the-fly trajectory calculations on the first electronically excited state, considering the presence of the IR pulse. The and I+ pump-probe transients reflect the role of the IR pulse in controlling the photodynamics of CH3I+ in the state, mainly through the coupling to the ground state and to the excited state manifold. Oscillatory features are observed and attributed to a vibrational wave packet prepared in the state. The IR probe pulse induces a coupling between electronic states leading to a slow depletion of fragments after the cation is transferred to the ground states and an enhancement of I+ fragments by absorption of IR photons yielding dissociative photoionization. © 2021 The Author(s). Published by IOP Publishing Ltd on behalf of the Institute of Physics and Deutsche Physikalische Gesellschaft

Comparison between transrectal palpation, B-mode and Doppler ultrasonography to assess luteal function in Holstein cattle

IntroductionOver the years, the most common methods for monitoring reproductive health in cattle have varied from transrectal palpation to B-mode ultrasonography. Nowadays, some portable ultrasound equipment includes the Doppler mode. Therefore, the aim of this study was to compare the accuracy of the different methods to assess corpus luteum (CL) functionality.MethodsIn Experiment 1, 53 Holstein lactating cows undergoing a synchronization protocol were examined via transrectal palpation and B-mode scanning. Measurements for the largest diameter (LAD) and subjective size of CL (SCLS) were collected. Data were analyzed using correlation analysis and ROC Curves. In Experiment 2, 30 Holstein non-lactating cows with a CL were administered PGF2α and examined several times after injection, first in B-mode and then with Power Doppler. Measurements for LAD, CL area (CLA) and subjective and objective CL blood flow were collected. Blood samples were taken in both experiments to determine P4 concentration. Data were analyzed using correlation analysis and the GLM repeated measures test.ResultsResults for Experiment 1 showed that LAD was more accurate than SCLS. In Experiment 2, CLA was the best measurement to assess CL function, although both subjective and objective CL blood flow offer accurate information 24 h after PGF2α administration.DiscussionConsequently, ultrasonography provides more accurate information about CL function than transrectal palpation. Although CLA seems to be an earlier indicator of luteal function than blood flow, 24 h after the onset of luteolysis, both parameters are valid

Femtosecond XUV–IR induced photodynamics in the methyl iodide cation

The time-resolved photodynamics of the methyl iodide cation (CH3I+) are investigated by means of femtosecond XUV–IR pump–probe spectroscopy. A time-delay-compensated XUV monochromator is employed to isolate a specific harmonic, the 9th harmonic of the fundamental 800 nm (13.95 eV, 88.89 nm), which is used as a pump pulse to prepare the cation in several electronic states. A time-delayed IR probe pulse is used to probe the dissociative dynamics on the first excited $\tilde {A}\enspace {}^{2}\mathrm{A}_{1}$ state potential energy surface. Photoelectrons and photofragment ions—${\mathrm{C}\mathrm{H}}_{3}^{+}$ and I+—are detected by velocity map imaging. The experimental results are complemented with high level ab initio calculations for the potential energy curves of the electronic states of CH3I+ as well as with full dimension on-the-fly trajectory calculations on the first electronically excited state $\tilde {A}\enspace {}^{2}\mathrm{A}_{1}$, considering the presence of the IR pulse. The ${\mathrm{C}\mathrm{H}}_{3}^{+}$ and I+ pump–probe transients reflect the role of the IR pulse in controlling the photodynamics of CH3I+ in the $\tilde {A}\enspace {}^{2}\mathrm{A}_{1}$ state, mainly through the coupling to the ground state $\tilde {X}\enspace {}^{2}\mathrm{E}_{3/2,1/2}$ and to the excited $\tilde {B}\enspace {}^{2}\mathrm{E}$ state manifold. Oscillatory features are observed and attributed to a vibrational wave packet prepared in the $\tilde {A}\enspace {}^{2}\mathrm{A}_{1}$ state. The IR probe pulse induces a coupling between electronic states leading to a slow depletion of ${\mathrm{C}\mathrm{H}}_{3}^{+}$ fragments after the cation is transferred to the ground $\tilde {X}\enspace {}^{2}\mathrm{E}_{3/2,1/2}$ states and an enhancement of I+ fragments by absorption of IR photons yielding dissociative photoionization

Functional coupling of sensorimotor and associative areas during a catching ball task: a qEEG coherence study

<p>Abstract</p> <p>Background</p> <p>Catching an object is a complex movement that involves not only programming but also effective motor coordination. Such behavior is related to the activation and recruitment of cortical regions that participates in the sensorimotor integration process. This study aimed to elucidate the cortical mechanisms involved in anticipatory actions when performing a task of catching an object in free fall.</p> <p>Methods</p> <p>Quantitative electroencephalography (qEEG) was recorded using a 20-channel EEG system in 20 healthy right-handed participants performed the catching ball task. We used the EEG coherence analysis to investigate subdivisions of alpha (8-12 Hz) and beta (12-30 Hz) bands, which are related to cognitive processing and sensory-motor integration.</p> <p>Results</p> <p>Notwithstanding, we found the main effects for the factor block; for alpha-1, coherence decreased from the first to sixth block, and the opposite effect occurred for alpha-2 and beta-2, with coherence increasing along the blocks.</p> <p>Conclusion</p> <p>It was concluded that to perform successfully our task, which involved anticipatory processes (i.e. feedback mechanisms), subjects exhibited a great involvement of sensory-motor and associative areas, possibly due to organization of information to process visuospatial parameters and further catch the falling object.</p

Software matemático aplicado a la docencia

La publicación del presente manual forma parte de las actividades desarrolladas durante el curso 2009/10 por el grupo de innovación docente (GID) ʺSoftware Matemático Aplicado a la Docencia (SMAD)ʺ financiado en convocatoria competitiva por el Vicerrectorado de Calidad y Formación Continua de la Universidad de Extremadura y coordinado por D. Ignacio Ojeda Martínez de Castilla.El objetivo de este manual es presentar los tutoriales de los programas Octave/MATLAB (cálculo científico y visualización de datos), R (cálculo estadístico y generación de gráficos) y MAXIMA (cálculo simbólico y numérico) y prácticas, tanto en los ficheros pdf como en los ficheros originales TEX, y ponerlas a disposición de la comunidad universitaria, para que aquellos docentes universitarios que puedan necesitarlos tengan acceso a ellas y puedan adaptarlas a sus necesidades.The objective of this manual is to introduce you to the tutorials of the programs Octave/MATLAB (scientific computing and visualization of data), R (statistical calculus and generation of graphics) and MAXIMA (symbolic computation and numerical calculation) and practice in both pdf files as in the original TEX files, and make them available to the university community, so that those academics who may need it have access to them and can adapt it to their needs

Emerging Compounds in Mexico: Challenges for Their Identification and Elimination in Wastewater

In recent years, the presence of organic pollutants has received great attention due to their effects on public health and biota. Within this set of compounds, a new range of compounds that are characterized by their high persistence and low degradation have been identified, called Emerging Compounds. Emerging pollutants include a wide variety of products for daily use of different structures, domestic and industrial applications, such as: pesticides, industrial and personal hygiene products, hormones, and drugs, most of which are toxic, persistent and bioaccumulative. A characteristic of these types of pollutants is that current wastewater treatment plants are unable to remove them; they are designed to remove organic matter and nutrients in higher concentrations. In Mexico there is little information on the concentration levels of these compounds, due to the lack of public policies aimed at providing resources to institutions and researchers trained to carry out this type of study. On the other hand, the technological infrastructure of the wastewater treatment plants is insufficient for the country’s demand. This situation represents one of the greatest challenges for the authorities responsible for the management of water resources, in the immediate time if it is intended to preserve said resource and therefore take care of the health of the population

Multicomponent synthesis and photophysical study of novel α,β-unsaturated carbonyl depsipeptides and peptoids

Multicomponent reactions were performed to develop novel α,β-unsaturated carbonyl depsipeptides and peptoids incorporating various chromophores such as cinnamic, coumarin, and quinolines. Thus, through the Passerini and Ugi multicomponent reactions (P-3CR and U-4CR), we obtained thirteen depsipeptides and peptoids in moderate to high yield following the established protocol and fundamentally varying the electron-rich carboxylic acid as reactants. UV/Vis spectroscopy was utilized to study the photophysical properties of the newly synthesized compounds. Differences between the carbonyl-substituted chromophores cause differences in electron delocalization that can be captured in the spectra. The near UV regions of all the compounds exhibited strong absorption bands. Compounds P2, P5, U2, U5, and U7 displayed absorption bands in the range of 250–350 nm, absorbing radiation in this broad region of the electromagnetic spectrum. A photostability study for U5 showed that its molecular structure does not change after exposure to UV radiation. Fluorescence analysis showed an incipient emission of U5, while U6 showed blue fluorescence under UV radiation. The photophysical properties and electronic structure were also determined by TD-DFT theoretical study