Has COVID-19 been the making of Open Science?

One outcome of the COVID-19 pandemic has been to put discussions about open research methods and practices, such as preprints, into the mainstream. Drawing on an recent analysis of the extent to which Open Science principles have been adopted during the COVID-19 pandemic, Lonni Besançon, Corentin Segalas, Clémence Leyrat, argue that while the pandemic has accelerated certain forms of Open Science, much work remains to be done to ensure that these principles are engaged with optimally

Focalización del sonido mediante estructuras periódicas tridimensionales

En un medio continuo e isótropo, una onda acústica se propaga de manera omnidireccional. Sin embargo, para algunas aplicaciones, puede ser útil restringir la difusión de una señal sonora dentro de un espacio finito. Los cristales de sonido son medios periódicos que tienen algunas propiedades acústicas en función de la disposición de los elementos que los componen, en particular la banda prohibida (rango de frecuencias no-transmitidas por el cristal) y la focalización del sonido (como para la lentes convergentes en óptica) gracias a la refracción negativa. El objeto de este estudio es utilizar un cristal de sonido tridimensional para focalizar una fuente de ultrasonidos y así determinar la evolución de la distancia focal en función de la frecuencia de la señal emitida. Esta evolución corresponde mucho al comportamiento esperado determinado de manera analítica. La anchura del haz en a las distancias focales ha sido medida también: el haz se concentra más en la secunda banda de propagación que en la primera. Además, la experiencia demuestra de nuevo la existencia de la banda prohibida alrededor de los 260 kHz. Los resultados tienen incertidumbres debidas a la precisión del montaje y a las reflexiones en el tanque. Un estudio futuro de la conservación de la estructura interna del cristal a través del haz saliendo del medio en campo cercano y lejano en función de la frecuencia podría ser interesante. In a continuous and isotropic medium, an acoustic wave propagates in an omnidirectional way. Nevertheless, for some applications, the diffusion of a sound signal should be restricted in a finite space. Sonic crystals are periodic mediums which possess some acoustic properties in accordance with the disposition of the elements which form that medium, particularly the band gap (frequency range which is not transmitted by the crystal) and sound focalization (like convergent lenses in optics) due to negative refraction. The aim of this study is to use a tridimensional sonic crystal for focusing an ultrasonic source and draw the focal distance's evolution according to the frequency of the signal. That evolution strongly corresponds to the expected behavior firstly determined in an analytic way. The beam size at the focal distances has also been drawn: the beam focuses more in the second propagation mode than in the first one. Besides, the experiment demonstrates the band gap's existence near the 260 kHz. The results present uncertainty among others due to the crystal and transducer's positioning and wave reflections in the water-filled tank. An interesting future study would be to observe the beam forms according to the frequency of the emitted signal.Lonni, A. (2011). Focalización del sonido mediante estructuras periódicas tridimensionales. Universitat Politècnica de València. http://hdl.handle.net/10251/14133Archivo delegad

Portfolio-based assessment in the language arts curriculum

The implementation of the whole language concept into language arts instructional programs has necessitated a change in assessment. This instructional concept focuses on children\u27s involvement in the language processes to create meaning. Through engaging in these processes, children\u27s language abilities are developed

The effect of cooperative integrated reading and compostion (CIRC) strategy on students’ reading comprehension of descriptive text at XI grade of MAN 1 Padangsidimpuan

This research focused about the effect of CIRC (Cooperative Integrated Reading and Composition) Strategy on Students’ Reading Comprehension in Descriptive Text at Grade XI MAN 1 Padangsidimpuan. The problems of this research were most of the student still get low grade with average 74; meanwhile the standard of English competency in this school is 78, and the students were lack motivation in reading comprehension and seldom to practice and also they didn’t have the strategy. Finally most of the students failed in reading comprehension. The purpose of this research was to find out the effect of CIRC (Cooperative Integrated Reading and Composition) Strategy on Students’ Reading Comprehension in Descriptive Text at Grade XI MAN 1 Padangsidimpuan. This research employed experimental research. The population of this research was the XI grade of MAN 1 Padangsidimpuan. The total of population were six classes. Then, the sample of the research was 2 classes, experiment class (XI IPA-2) and control class XI IPA-1). It was taken after conducting normality and homogeneity test. To collect the data, researcher used test for measuring students’ Reading Comprehension achievement. To analysis the data, the researcher used t-test. Based on the result of the research, researcher found that the result of experimental class was higher than control class (80.95>75.85), and the score of tcount was bigger than ttable (6.98> 2.021). It means that the hypothesis alternative (Ha) was accepted. It was concluded that there was significant effect of CIRC (Cooperative Integrated Reading and Composition) Strategy on Students’ Reading Comprehension of Descriptive Text at Grade XI MAN 1 Padangsidimpuan

Migraine and Major Depression: A Longitudinal Study

Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/72886/1/j.1526-4610.1994.hed3407387.x.pd

Single-centre study surveying neurology trainees\u27 and faculty\u27s perceptions of the impact of the COVID-19 pandemic on residents\u27 medical education

Objective: To assess perceptions of our neurology residents and faculty regarding training experience and medical education during the early COVID-19 pandemic. Methods: We distributed two online, voluntary and anonymous surveys to trainees and teaching faculty of our Neurology Department at Henry Ford Hospital. Surveys inquired about trainees\u27 stress, well-being, clinical experience and satisfaction with medical education and available support resources during the first wave of the COVID-19 pandemic in Michigan (mid-March to June 2020). Results: A total of 17/31 trainees and 25/42 faculty responded to the surveys. Eight (47%) trainees reported high stress levels. Nine (57%) were redeployed to cover COVID-19 units. Compared with non-redeployed trainees, redeployed residents reported augmented medical knowledge (89% vs 38%, p=0.05). There was no difference in the two groups regarding overall satisfaction with residency experience, stress levels and didactics attendance. Twenty-one (84%) faculty felt that the redeployment interfered with trainees education but was appropriate, while 10 (59%) trainees described a positive experience overall. Both trainees and faculty believed the pandemic positively impacted trainees\u27 experience by increasing maturity level, teamwork, empathy, and medical knowledge, while both agreed that increased stress and anxiety levels were negative outcomes of the pandemic. Twelve (70%) trainees and 13 (52%) faculty were interested in pursuing more virtual didactics in the future. Conclusion: Our findings provide an objective assessment of residents\u27 experience during the COVID-19 pandemic and can guide teaching programmes in their medical education response in the face of future global crises