Análisis de la satisfacción con respecto a una maestría de una universidad de Lima desde la perspectiva de sus egresados

La presente investigación busca analizar la satisfacción de los egresados de una maestría. Partimos de la noción de que las percepciones sobre el proceso de aprendizaje son determinantes para entender la satisfacción sobre un servicio académico recibido. Planteamos un marco conceptual que integra la teoría del involucramiento de Astin (1985) y la satisfacción estudiantil que prioriza los servicios académicos de Walberg (1981) y de Aguer (2016). En ese sentido, realizamos entrevistas a profundidad para entender el fenómeno. A partir de ello, planteamos que la satisfacción de los servicios de maestría analizada depende de la enseñanza académica y el desarrollo emocional

Estuarine Mapping and Eco-Geomorphological Characterization for Potential Application in Conservation and Management: Three Study Cases along the Iberian Coast

Geomorphological changes in recent decades in three estuaries along the Iberian coast were analysed using aerial orthophotographs. A hierarchical classification scheme, based on a literature review representing 26 estuarine eco-geomorphological features relevant to estuarine dynamics and functioning, is described. The estuaries selected were San Vicente de la Barquera (N Spain), Guadiana River (SW border between Spain and Portugal) and the Ebro River Delta mouth (NE Spain). For these systems, a 60-year time series of high-resolution maps was developed, analysing the changes in feature surfaces. The main subsystems analysed were beach, dunes, saltmarshes and the drainage network. The results of the cartographies showed general behaviour common to all transitional systems, relationships among main subsystems and processes inherent to each one. This work illustrates how beaches and dunes serve as a protective barrier for the tidal flats, acting as a sediment buffer for the entire system. The subsystems are connected by the drainage network responsible for the exchange of matter and energy between them. Furthermore, an accuracy assessment was performed in one of the study zones to identify the limitations of mapping with aerial photographs. The results explain the changes with time but also the processes and relationships between the estuarine features at a long-term scale. This work adds an important perspective towards a general understanding of their dependence on intrinsic and boundary conditions

Sample Uncertainty Analysis of Daily Flood Quantiles Using a Weather Generator

[EN] The combined use of weather generators (WG) and hydrological models (HM) in what is called synthetic continuous simulation (SCS) has become a common practice for carrying out flood studies. However, flood quantile estimations are far from presenting relatively high confidence levels, which mostly relate to the uncertainty of models¿ input data. The main objective of this paper is to assess how different precipitation regimes, climate extremality, and basin hydrological characteristics impact the uncertainty of daily flood quantile estimates obtained by SCS. A Monte Carlo simulation from 18 synthetic populations encompassing all these scenarios was performed, evaluating the uncertainty of the simulated quantiles. Additionally, the uncertainty propagation of the quantile estimates from the WG to the HM was analyzed. General findings show that integrating the regional precipitation quantile (XT,P) in the WG model calibration clearly reduces the uncertainty of flood quantile estimates, especially those near the regional XT,P. Basin size, climate extremality, and the hydrological characteristics of the basin have been proven not to affect flood quantiles¿ uncertainty substantially. Furthermore, it has been found that uncertainty clearly increases with the aridity of the climate and that the HM is not capable of buffering the uncertainty of flood quantiles, but rather increases it.The authors thank AEMET and the UC for the data provided to carry out this work (Spain02 dataset). This work was supported by the Spanish Ministry of Science and Innovation through the research projects TETISCHANGE (RTI2018-093717-B-100) and TETISPREDICT (PID2022-141631OBI00). Funding for the open-access charge has been provided by Universitat Politècnica de ValènciaBeneyto, C.; Vignes, G.; Aranda Domingo, JÁ.; Francés, F. (2023). Sample Uncertainty Analysis of Daily Flood Quantiles Using a Weather Generator. Water. 15(19):1-16. https://doi.org/10.3390/w15193489116151

Evaluating the Performance of High Spatial Resolution UAV-Photogrammetry and UAV-LiDAR for Salt Marshes: The Cadiz Bay Study Case

Salt marshes are very valuable and threatened ecosystems, and are challenging to study due to their difficulty of access and the alterable nature of their soft soil. Remote sensing methods in unmanned aerial vehicles (UAVs) offer a great opportunity to improve our knowledge in this type of complex habitat. However, further analysis of UAV technology performance is still required to standardize the application of these methods in salt marshes. This work evaluates and tunes UAV-photogrammetry and UAV-LiDAR techniques for high-resolution applications in salt marsh habitats, and also analyzes the best sensor configuration to collect reliable data and generate the best results. The performance is evaluated through the accuracy assessment of the corresponding generated products. UAV-photogrammetry yields the highest spatial resolution (1.25 cm/pixel) orthomosaics and digital models, but at the cost of large files that require long processing times, making it applicable only for small areas. On the other hand, UAV-LiDAR has proven to be a promising tool for coastal research, providing high-resolution orthomosaics (2.7 cm/pixel) and high-accuracy digital elevation models from lighter datasets, with less time required to process them. One issue with UAV-LiDAR application in salt marshes is the limited effectiveness of the autoclassification of bare ground and vegetated surfaces, since the scattering of the LiDAR point clouds for both salt marsh surfaces is similar. Fortunately, when LiDAR and multispectral data are combined, the efficiency of this step improves significantly. The correlation between LiDAR measurements and field values improves from R2 values of 0.79 to 0.94 when stable reference points (i.e., a few additional GCPs in rigid infrastructures) are also included as control points. According to our results, the most reliable LiDAR sensor configuration for salt marsh applications is the nadir non-repetitive combination. This configuration has the best balance between dataset size, spatial resolution, and processing time. Nevertheless, further research is still needed to develop accurate canopy height models. The present work demonstrates that UAV-LiDAR technology offers a suitable solution for coastal research applications where high spatial and temporal resolutions are required

Protective Effects of Human and Mouse Soluble Scavenger-Like CD6 Lymphocyte Receptor in a Lethal Model of Polymicrobial Sepsis

Sepsis still constitutes an unmet clinical need, which could benefit from novel adjunctive strategies to conventional antibiotic therapy. The soluble form of the scavenger-like human CD6 lymphocyte receptor (shCD6) binds to key pathogenic components from Gram-positive and -negative bacteria and shows time- and dose-dependent efficacy in mouse models of monobacterial sepsis. The objective of the present work was to demonstrate the effectiveness of infusing mouse and human sCD6 by different systemic routes, either alone or as adjunctive therapy to gold standard antibiotics, in a lethal model of polymicrobial sepsis. To this end, C57BL/6 mice undergoing high-grade septic shock induced by cecal ligation and puncture (CLP; ≥90% lethality) were infused via the intraperitoneal (i.p.) or intravenous (i.v.) route with shCD6 at different doses and time points, either alone or in combination with imipenem/cilastatin (I/C) at a dose of 33 mg/kg of body weight every 8 h. Significantly reduced mortality and proinflammatory cytokine levels were observed by i.p. infusion of a single shCD6 dose (1.25 mg/kg) 1 h pre- or post-CLP. When using the i.v. route, mice survival was significantly extended by starting shCD6 infusion at later time points post-CLP (up to 6 h after CLP). Significant adjunctive effects on mouse survival were observed by i.p. or i.v. infusion of shCD6 in combination with i.p. I/C post-CLP. Similar results were obtained in mice expressing high sustained levels (5 to 10 μg/ml) of mouse sCD6 in serum by means of transduction with hepatotropic adeno-associated virus (AAV). Taken together, the data support the conserved antibacterial effects of human and mouse sCD6 and their use as adjunctive therapy in experimental models of complex and severe polymicrobial sepsis.Ministerio de Economía y Competitividad (España) SAF2013-46151-R PCIN-2015-070Instituto de Salud Carlos III RD12/0015/0018European Development Regional Fund RD12/0015/0018Fundació La Marató TV3 201319-30-3

Terapia virtual fonoaudiológica en el desarrollo de lenguaje oral en niños con síndrome de Down

El trabajo “Terapia fonoaudiológica virtual en el desarrollo de lenguaje oral de niños con Síndrome de Down” se realizó debido a que los niños con este síndrome requieren una apropiada terapia a pesar de la cuarentena que atravesamos. Por ello se describe el trabajo fonoaudiológico y como se efectúa en la virtualidad. El objetivo fue describir estrategias que pueden ser usadas en la terapia virtual fonoaudiológica en el desarrollo del lenguaje de un niño con el síndrome. El enfoque de la investigación fue cualitativo, tipo básico y diseño descriptivo. La conclusión fue que la terapia virtual fonoaudiológica trabajara el lenguaje tratando los componentes del lenguaje y la motricidad orofacial, buscando obtener mejoras en el lenguaje y la tonicidad de los músculos orofaciales.Trabajo académic

Design of Bio-Absorbent Systems for the Removal of Hydrocarbons from Industrial Wastewater: Pilot-Plant Scale

The objective of this study was the development and design of a treatment system at a pilot-plant scale for the remediation of hydrocarbons in industrial wastewater. The treatment consists of a combined approach of absorption and biodegradation to obtain treated water with sufficient quality to be reused in fire defense systems (FDSs). The plant consists of four vertical flow columns (bioreactors) made of stainless steel (ATEX Standard) with dimensions of 1.65 × 0.5 m and water volumes of 192.4 L. Each bioreactor includes a holder to contain the absorbent material (Pad Sentec polypropylene). The effectiveness of the treatment system has been studied in wastewater with high and low pollutant loads (concentrations higher than 60,000 mg L−1 of total petroleum hydrocarbons (TPH) and lower than 500 mg L−1 of TPHs, respectively). The pilot-plant design can function at two different flow rates, Q1 (180 L h−1 ) and Q2 (780 L h−1 ), with or without additional aeration. The results obtained for strongly polluted wastewaters showed that, at low flow rates, additional aeration enhanced hydrocarbon removal, while aeration was unnecessary at high flow rates. For wastewater with a low pollutant load, we selected a flow rate of 780 L h−1 without aeration. Different recirculation times were also tested along with the application of a post-treatment lasting 7 days inside the bioreactor without recirculation. The microbial diversity studies showed similar populations of bacteria and fungi in the inlet and outlet wastewater. Likewise, high similarity indices were observed between the adhered and suspended biomass within the bioreactors. The results showed that the setup and optimization of the reactor represent a step forward in the application of bioremediation processes at an industrial/large scale.Compañía Logística de Hidrocarburos S.

A Comparison of Ammonia Inhibition on the Anaerobic Digestion of Organic Acids Between Digestate from Anaerobic Co- and Mono-Digestion Systems [presentation]

Undergraduate thesis presentation

Hemangioma coroideo. Presentación de un paciente

A 34-year-old woman, who attended consultation due to a decrease of the left eye visual acuity, is presented. The patient was diagnosed with peripapillary circumscribed choroidal hemangioma and underwent a photodynamic therapy. The patient is still under ophthalmology follow up.Se presenta una paciente de 34 años de edad que acudió a consulta por disminución de la agudeza visual del ojo izquierdo; se le diagnosticó hemangioma coroideo circunscrito peripapilar y se le practicó terapia fotodinámica; todavía se encuentra bajo seguimiento oftalmológico