2,360 research outputs found
Evaluation of emergency remote teaching during covid-19 lockdown in a Spanish university
The lockdown caused by the pandemic resulted in the closure of schools and universities. Professors had to adapt their subjects to be taught remotely to continue their classes, and students had to cope with various personal situations such as isolation, and returning to their countries. Ensuring that the quality of teaching was maintained would usually have required months of planning and design. In contrast, these changes had to be made in a few days, which is why this situation could be considered as Emergency Remote Teaching (ERT). The objective of this article is to evaluate the teaching of our faculty during this period using the CIPP model (Context, Input, Procedure and Product), which is especially focused on educational projects among others. The university was able to maintain teaching during this period despite the difficulties of the transition. In addition, evaluation surveys show that the satisfaction of professors and students was also maintained. This was possible thanks to the order and clarity transmitted from university authorities and the commitment of the professors, despite their increased workload. This knowledge is important to ensure a better response by universities in future emergencies
Aprendizaje basado en proyectos: aplicación a la asignatura “Proyecto de Embarcaciones Rápidas y a Vela”
En este artículo se presenta la metodología de aprendizaje aplicada a la asignatura “Proyecto de Embarcaciones Rápidas y a Vela”, optativa del grado de Arquitectura Naval de la UPM. Proponemos un enfoque amplio basado en proyectos (PBL), con tres objetivos: que los alumnos realicen un ante-proyecto de embarcación rápida o a vela; que conecten con la realidad industrial del sector; y, por último, estimular su curiosidad y motivación hacia el contenido del curso. La asignatura se divide en dos bloques temáticos y tres módulos de trabajo, dos teóricos y uno práctico. Para evaluar el cumplimento de los objetivos propuestos se ha realizado una encuesta a los alumnos y se analizan algunos de los proyectos entregados por ellos. El artículo se cierra con conclusiones y propuestas de trabajo futuro
Potenciar la experiencia y habilidades frente a problemas prácticos en las clases de laboratorio de “Flotabilidad y Estabilidad”
En este trabajo se presentan las medidas adoptadas en las prácticas de la asignatura “Flotabilidad y Estabilidad”, del grado de “Arquitectura Naval” de la UPM, para potenciar la capacidad de los alumnos de enfrentarse a problemas prácticos y para entender la casuística que ellos involucran (necesidad de planificación, manejo de herramientas, etc.). En concreto, se describen: a) Una actividad complementaria, introducida en el curso 2019/2020, que involucra la realización de un experimento con un barco real; b) La adaptación de las prácticas a formato no presencial en el curso 2020/2021. Este cambio de formato, consecuencia de la situación de pandemia, tiene en principio un efecto negativo en cuanto al objetivo que se persigue. Para tratar de minimizarlo, se introdujo un nuevo concepto de práctica en la que los alumnos realizaron un experimento casero, devolviendo así el aspecto práctico a la actividad, a pesar de la no presencialidad. En este artículo se evalúa la efectividad de las medidas implementadas en cuanto al cumplimento del objetivo de mejorar la capacidad de los alumnos de enfrentar problemas prácticos, así como de otros objetivos que se buscan con las prácticas. El artículo se cierra con conclusiones y propuestas de trabajo futuro
New role of the antidepressant imipramine as a Fascin1 inhibitor in colorectal cancer cells
Colorectal cancer: Antitumor antidepressant The antidepressant drug imipramine can block the activity of a protein that contributes to the progression of certain aggressive tumors. Serrated adenocarcinoma (SAC) is a form of colorectal cancer with a poor prognosis. A key factor in SAC development is the overexpression of the protein fascin1, which promotes the formation of structures that help cancer cells move around, thereby leading to metastasis. Pablo Conesa-Zamora at Santa Lucia University Hospital in Cartagena, Horacio Perez-Sanchez at the Universidad Catolica de Murcia in Guadalupe, Spain, and coworkers demonstrated that imipramine shows promise in binding to fascin1 and blocking its activity. The team analyzed over 9500 compounds as potential fascin1 blockers, identifying imipramine as a possible option. In tests on human tissues and in vivo studies using zebrafish, the drug reduced cancer invasion and metastasis. Serrated adenocarcinoma (SAC) is more invasive, has worse outcomes than conventional colorectal carcinoma (CRC), and is characterized by frequent resistance to anti-epidermal growth factor receptor (EGFR) and overexpression of fascin1, a key protein in actin bundling that plays a causative role in tumor invasion and is overexpressed in different cancer types with poor prognosis. In silico screening of 9591 compounds, including 2037 approved by the Food and Drug Administration (FDA), was performed, and selected compounds were analyzed for their fascin1 binding affinity by differential scanning fluorescence. The results were compared with migrastatin as a typical fascin1 inhibitor. In silico screening and differential scanning fluorescence yielded the FDA-approved antidepressant imipramine as the most evident potential fascin1 blocker. Biophysical and different in vitro actin-bundling assays confirm this activity. Subsequent assays investigating lamellipodia formation and migration and invasion of colorectal cancer cells in vitro using 3D human tissue demonstrated anti-fascin1 and anti-invasive activities of imipramine. Furthermore, expression profiling suggests the activity of imipramine on the actin cytoskeleton. Moreover, in vivo studies using a zebrafish invasion model showed that imipramine is tolerated, its anti-invasive and antimetastatic activities are dose-dependent, and it is associated with both constitutive and induced fascin1 expression. This is the first study that demonstrates an antitumoral role of imipramine as a fascin1 inhibitor and constitutes a foundation for a molecular targeted therapy for SAC and other fascin1-overexpressing tumors.Peer reviewe
Manejo Integral de Agua y Suelo en Centroamérica. Bases científicas para el desarrollo rural comunitario.
Este libro recoge los frutos de la colaboración y trabajo conjunto de un grupo de Universidades Iberoamericanas entre 2007 y 2012 el marco de las actividades del Programa de Cooperación Comunidad, Agua y Bosque en Centroamérica (CAB Centroamérica, http://www2.caminos.upm.es/Departamentos/imt/Topografia/Cab/cab.html ). Las actividades se han realizado con el apoyo del Programa de Cooperación Universitaria PCI-AECID IBEROAMÉRICA, de la Dirección de Cooperación para el Desarrollo de la Universidad Politécnica de Madrid y de los fondos propios de las Universidades latinoamericanas, con especial mención a la Universidad de Costa Rica, coordinadora de los trabajos en Centroamérica. El inicio de esta colaboración se produjo en 2007 a partir de la identificación de un objetivo común: profundizar la investigación sobre la dinámica agua-suelo-planta para mejorar la producción y la calidad del agua de los sistemas de abastecimiento comunitarios en Centroamérica
Ciudad-territorio sustentable. Procesos, actores y estructuras
En los últimos años, los estudios urbanos especializados insisten en que los procesos de urbanización por los que atraviesan los distintos países desarrollados, parecen dejar atrás las explicaciones de la urbanización industrial, han surgido otras construcciones y perspectivas unas más acabadas que otras (Indovina, 1998, la “ciudad difusa”; Dematteis 1998, ciudad sin centros; Nel-lo, 1998 ciudad sin confines, Soja, 2008, la exópolis). En suma se dice que se avanza hacia la urbanización generalizada, ello acaba con la larga trayectoria del funcionamiento y naturaleza de la ciudad moderna, el cambio urbano estructural actual, es nuevamente, consecuencia de la descentralización, difusión, redistribución del desarrollo, del crecimiento y las innovaciones ahora sobre una estructura en el territorio. Ha sido una mutación no sólo empírica sino que ha dado lugar a la confrontación teórica. El sistema urbano jerárquico ha reducido su valor interpretativo porque se han modificado los supuestos en los que se basaban las relaciones de dominio y dependencia de los centros principales, porque se han abaratado los costos de transporte y el efecto de la distancia ya no es una limitante absoluta, ahora los procesos productivos flexibles y descentralizados propician las relaciones técnicas horizontales con lo cual se consiguen economías de escala externas e internas a las empresas en un territorio ampliado y no sólo exclusivamente en la aglomeración económica (Precedo, 2003; Veltz, 1999; Boix, 2002; Camagni, 2005; De Santiago, 2008 y; Garmendia, 2010).El objetivo es examinar dentro de la descentralización del proceso urbano a la ciudad-territorio en América Latina, en particular en México. En contextos urbanos desarrollados se afirma la convergencia urbana con la apertura de las unidades funcionales de los sistemas urbanos donde operan redes e interrelaciones de desarrollo cualitativo en el territorio. América Latina registra evidencias empíricas poco claras, existe alta concentración de aquella economía que contribuye al crecimiento nacional, mientras la población se descentraliza rápidamente. México, es un caso de primacía urbana histórica aunque da paso a la formación de regiones urbanas, mismas que reproducen relaciones polarizadas y escasamente descentralizadas. De manera que, en tanto domine la concentración espacial económica, la ciudadterritorio se podrá presentar en el continente sólo con algunos rasgos en regiones urbanas con mayor desarrollo y crecimiento. Palabras claves: descentralización urbana, sistema urbano, ciudad-territorio
How Did the COVID-19 Lockdown Pandemic Affect the Depression Symptomatology in Mediterranean Older Adults with Metabolic Syndrome?
Background and Aims. To control the COVID-19 spread, in March 2020, a forced home lockdown was established in Spain. In the present study, we aimed to assess the effect of mobility and social COVID-19-established restrictions on depressive symptomatology in older adults with metabolic syndrome. We hypothesize that severe restrictions might have resulted in detrimental changes in depressive symptomatology. Methods. 2,312 PREDIMED-Plus study participants (men = 53:9%; mean age = 64:9±4:8 years) who completed a COVID-19 lockdown questionnaire to assess the severity of restrictions/lockdown and the validated Spanish version of the Beck Depression Inventory-II (BDI-II) during the three established phases concerning the COVID-19 lockdown in Spain (prelockdown, lockdown, and postlockdown) were included in this longitudinal analysis. Participants were categorized according to high or low lockdown severity. Analyses of covariance were performed to assess changes in depressive symptomatology across lockdown phases. Results. No significant differences in participant depression symptomatology changes were observed between lockdown severity categories (low/high) at the studied phases. During the lockdown phase, participants showed a decrease in BDI-II score compared to the prelockdown phase (mean (95% CI), -0.48 (-0.24, -0.72), P < 0:001); a nonsignificantly larger decrease was observed in participants allocated in the low-lockdown category (low: -0.59 (-0.95, -0.23), high: -0.43 (-0.67, -0.19)). Similar decreases in depression symptomatology were found for the physical environment dimension. The post- and prelockdown phase BDI-II scores were roughly similar. Conclusions. The COVID-19 pandemic lockdown was associated with a decrease in depressive symptomatology that returned to prelockdown levels after the lockdown. The degree of lockdown was not associated with depressive symptomatology. The potential preventive role of the physical environment and social interactions on mental disorders during forced home lockdown should be further studie
Improved functionalization of oleic acid-coated iron oxide nanoparticles for biomedical applications
Superparamagnetic iron oxide nanoparticles
can providemultiple benefits for biomedical applications
in aqueous environments such asmagnetic separation or
magnetic resonance imaging. To increase the colloidal
stability and allow subsequent reactions, the introduction
of hydrophilic functional groups onto the particles’
surface is essential. During this process, the original
coating is exchanged by preferably covalently bonded
ligands such as trialkoxysilanes. The duration of the
silane exchange reaction, which commonly takes more
than 24 h, is an important drawback for this approach. In
this paper, we present a novel method, which introduces
ultrasonication as an energy source to dramatically
accelerate this process, resulting in high-quality waterdispersible nanoparticles around 10 nmin size. To prove
the generic character, different functional groups were
introduced on the surface including polyethylene glycol
chains, carboxylic acid, amine, and thiol groups. Their
colloidal stability in various aqueous buffer solutions as
well as human plasma and serum was investigated to
allow implementation in biomedical and sensing
applications.status: publishe
Penilaian Kinerja Keuangan Koperasi di Kabupaten Pelalawan
This paper describe development and financial performance of cooperative in District Pelalawan among 2007 - 2008. Studies on primary and secondary cooperative in 12 sub-districts. Method in this stady use performance measuring of productivity, efficiency, growth, liquidity, and solvability of cooperative. Productivity of cooperative in Pelalawan was highly but efficiency still low. Profit and income were highly, even liquidity of cooperative very high, and solvability was good
Juxtaposing BTE and ATE – on the role of the European insurance industry in funding civil litigation
One of the ways in which legal services are financed, and indeed shaped, is through private insurance arrangement. Two contrasting types of legal expenses insurance contracts (LEI) seem to dominate in Europe: before the event (BTE) and after the event (ATE) legal expenses insurance. Notwithstanding institutional differences between different legal systems, BTE and ATE insurance arrangements may be instrumental if government policy is geared towards strengthening a market-oriented system of financing access to justice for individuals and business. At the same time, emphasizing the role of a private industry as a keeper of the gates to justice raises issues of accountability and transparency, not readily reconcilable with demands of competition. Moreover, multiple actors (clients, lawyers, courts, insurers) are involved, causing behavioural dynamics which are not easily predicted or influenced.
Against this background, this paper looks into BTE and ATE arrangements by analysing the particularities of BTE and ATE arrangements currently available in some European jurisdictions and by painting a picture of their respective markets and legal contexts. This allows for some reflection on the performance of BTE and ATE providers as both financiers and keepers. Two issues emerge from the analysis that are worthy of some further reflection. Firstly, there is the problematic long-term sustainability of some ATE products. Secondly, the challenges faced by policymakers that would like to nudge consumers into voluntarily taking out BTE LEI
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