El proceso de elaboración del Trabajo Final de Graduación: Ampliando a nuevos saberes y destrezas

Este trabajo se propone exponer la experiencia de enseñanza en el marco de las materias Metodología de la Investigación Social y Taller de Graduación Final de la Licenciatura en Trabajo Social de la Universidad Nacional de José C. Paz.1 Para ello, describiremos los dispositivos de acompañamiento reflexionando, a la vez, sobre la implicancia de la formación en investigación en trabajo social. Por un lado, presentamos las estrategias de armado de las materias describiendo los procesos de articulación y conformación del equipo docente y los diseños de los programas. Por otro, los dispositivos de acompañamiento en la escritura académica desplegados para apoyar a las y los estudiantes en sus tareas de escritura desde el esbozo de sus intereses de investigación hasta la entrega de su trabajo final con el que obtienen su título de grado. Por último, presentamos algunas cuestiones que configuran la elaboración de los trabajos por parte de nuestras y nuestros estudiantes.Fil: Bettanin, Cristina Ines. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de Jose Clemente Paz; ArgentinaFil: Candil, Ana Laura. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de Jose Clemente Paz; ArgentinaFil: Carbonetti, Mariangeles. Universidad Nacional de Jose Clemente Paz; ArgentinaFil: Enrique, Iara Nuria. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de Jose Clemente Paz; ArgentinaFil: Fernández, Blanca Soledad. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de Jose Clemente Paz; ArgentinaFil: Gonzalez, Laura. Universidad Nacional de Jose Clemente Paz; ArgentinaFil: Petrellin, Lucía. Universidad Nacional de Jose Clemente Paz; ArgentinaFil: Ramos, Julia María. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de Jose Clemente Paz; ArgentinaFil: Tobias, Melina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de Jose Clemente Paz; Argentin

Search for gravitational-lensing signatures in the full third observing run of the LIGO-Virgo network

Gravitational lensing by massive objects along the line of sight to the source causes distortions of gravitational wave-signals; such distortions may reveal information about fundamental physics, cosmology and astrophysics. In this work, we have extended the search for lensing signatures to all binary black hole events from the third observing run of the LIGO--Virgo network. We search for repeated signals from strong lensing by 1) performing targeted searches for subthreshold signals, 2) calculating the degree of overlap amongst the intrinsic parameters and sky location of pairs of signals, 3) comparing the similarities of the spectrograms amongst pairs of signals, and 4) performing dual-signal Bayesian analysis that takes into account selection effects and astrophysical knowledge. We also search for distortions to the gravitational waveform caused by 1) frequency-independent phase shifts in strongly lensed images, and 2) frequency-dependent modulation of the amplitude and phase due to point masses. None of these searches yields significant evidence for lensing. Finally, we use the non-detection of gravitational-wave lensing to constrain the lensing rate based on the latest merger-rate estimates and the fraction of dark matter composed of compact objects

Search for eccentric black hole coalescences during the third observing run of LIGO and Virgo

Despite the growing number of confident binary black hole coalescences observed through gravitational waves so far, the astrophysical origin of these binaries remains uncertain. Orbital eccentricity is one of the clearest tracers of binary formation channels. Identifying binary eccentricity, however, remains challenging due to the limited availability of gravitational waveforms that include effects of eccentricity. Here, we present observational results for a waveform-independent search sensitive to eccentric black hole coalescences, covering the third observing run (O3) of the LIGO and Virgo detectors. We identified no new high-significance candidates beyond those that were already identified with searches focusing on quasi-circular binaries. We determine the sensitivity of our search to high-mass (total mass M>70 M⊙) binaries covering eccentricities up to 0.3 at 15 Hz orbital frequency, and use this to compare model predictions to search results. Assuming all detections are indeed quasi-circular, for our fiducial population model, we place an upper limit for the merger rate density of high-mass binaries with eccentricities 0<e≤0.3 at 0.33 Gpc−3 yr−1 at 90\% confidence level

Ultralight vector dark matter search using data from the KAGRA O3GK run

Among the various candidates for dark matter (DM), ultralight vector DM can be probed by laser interferometric gravitational wave detectors through the measurement of oscillating length changes in the arm cavities. In this context, KAGRA has a unique feature due to differing compositions of its mirrors, enhancing the signal of vector DM in the length change in the auxiliary channels. Here we present the result of a search for U(1)B−L gauge boson DM using the KAGRA data from auxiliary length channels during the first joint observation run together with GEO600. By applying our search pipeline, which takes into account the stochastic nature of ultralight DM, upper bounds on the coupling strength between the U(1)B−L gauge boson and ordinary matter are obtained for a range of DM masses. While our constraints are less stringent than those derived from previous experiments, this study demonstrates the applicability of our method to the lower-mass vector DM search, which is made difficult in this measurement by the short observation time compared to the auto-correlation time scale of DM

<b>Effect of diets containing whole cottonseed on the quality of sheep semen</b> - doi: 10.4025/actascianimsci.v34i3.12963

<p class="aresumo">This study evaluated the semen quality of Santa Ines sheep fed diets containing different levels of whole cottonseed (WCS). Twenty sheep were distributed into four groups that were given diets with 0; 20; 30; 40% of WCS. For this study the semen was collected by electroejaculation, and a monthly andrological examination was performed during nine months. The analyzed variables were: scrotal circumference (SC), appearance and color of the ejaculate, progressive motility (PM), vigor, mass movement (MM), total sperm concentration (spzX10⁹), sperm morphology (SM) and blood hematocrit. The SC had no difference among diets, with mean 31.83 cm. The animals fed diets with WCS, presented mean intake of 9.16 mg gossypol kg BW, and were prone to present greenish semen, and appearance ranging from thin creamy to watery. The PM decreased linearly (p < 0.05) with increasing level of WCS, while the vigor had a quadratic trend. The total defects increased linearly in relation to reference values described in literature. The WSC had no influence on hematocrit levels, but did affect the PM and vigor of spermatozoa, thus not recommended to diets of animals for breeding.</p