Search results for "lcsh:Physics"

Aerosol properties, source identification, and cloud processing in orographic clouds measured by single particle mass spectrometry on a central Europ…

2016

Cloud residues and out-of-cloud aerosol particles with diameters between 150 and 900 nm were analysed by online single particle aerosol mass spectrometry during the 6-week study Hill Cap Cloud Thuringia (HCCT)-2010 in September–October 2010. The measurement location was the mountain Schmücke (937 m a.s.l.) in central Germany. More than 160 000 bipolar mass spectra from out-of-cloud aerosol particles and more than 13 000 bipolar mass spectra from cloud residual particles were obtained and were classified using a fuzzy c-means clustering algorithm. Analysis of the uncertainty of the sorting algorithm was conducted on a subset of the data by comparing the clustering output with particle-by-par…

Announcement for “Separations 2019 Outstanding Reviewer Award” Winner

2020

Peer review is an essential part of the publication process, ensuring that Separations maintains high quality standards for its published papers[...]

Influencia del conocimiento previo y de la estructura conceptual de los estudiantes de BUP en la resolución de problemas

2016

Con nuestro estudio pretendemos analizar la influencia que el conocimiento previo y el conocimiento conceptual adquirido tras la instrucción tienen en la resolución de problemas. Los participantes en el mismo fueron estudiantes de BUP valencianos.

Editorial: Ciência da Sustentabilidade

2014

De los corpúsculos de luz al efecto fotoeléctrico. Una propuesta didáctica con base en la discusión de modelos.

2010

Se presenta una propuesta de una unidad didáctica cuyo objetivo es analizar la evolución de los modelos de la radiación, generar una visión más adecuada sobre la ciencia y la construcción del conocimiento científico que la que suele ser común en alumnos y profesores y construir un modelo de la radiación más cercano a la visión científica actual, en el que las propiedades del modelo corpuscular y el ondulatorio se conjugan en un nuevo objeto cuántico con comportamiento dual. A través de cuatro actividades se analiza la secuencia de modelos propuestos a lo largo de la historia para explicar la na…

Papel de la Energía en nuestras vidas : una ocasión privilegiada para el estudio de la situación del mundo

2010

El objetivo de este trabajo es presentar un programa de actividades centrado en el estudio de la energía como contribución a una mejor comprensión de la actual situación de emergencia planetaria,estrechamente vinculada a la obtención y uso de recursos energéticos, así como para generar actitudes y comportamientos adecuados para hacer frente a los problemas que caracterizan dicha situación. Este material didáctico ha sido utilizado en talleres dirigidos a profesores en formación inicial y permanente, así como a estudiantes de universidad y de secundaria, con resultados que quedan recogidos en los comentarios a las a…

Análisis crítico de la introducción de la física moderna en la enseñanza media

1986

SUMMARY: This paper deals witb tbe introduction of Modern Pbysics in bigb scbool curricula, trying to answer to tbese questions: - How are Modern Pbysics concepts introduced? -Do pupils get a correct understanding of tbese concepts? Some results are given wbicb sbow tbe need of a deep cbange in tbe way Modern Pbysics concepts are usualy taugbt.

Ds0⁎±(2317) and KD scattering from Bs0 decay

2015

AbstractWe study the B¯s0→Ds−(KD)+ weak decay, and look at the KD invariant mass distribution, for which we use recent lattice QCD results for the KD interaction from where the Ds0⁎(2317) resonance appears as a KD bound state. Since there are not yet experimental data on this reaction, in a second step we propose an analysis method to obtain information on the Ds0⁎(2317) resonance from the future experimental KD mass distribution in this decay. For this purpose, we generate synthetic data taking a few points from our theoretical distribution, to which we add a 5% or 10% error. With this analysis method, we prove that one can obtain from these “data” the existence of a bound KD state, the KD…

The KK¯π decay of the f1(1285) and its nature as a K⁎K¯−cc molecule

2015

AbstractWe investigate the decay of f1(1285)→πKK¯ with the assumption that the f1(1285) is dynamically generated from the K⁎K¯−cc interaction. In addition to the tree level diagrams that proceed via f1(1285)→K⁎K¯−cc→πKK¯, we take into account also the final state interactions of KK¯→KK¯ and πK→πK. The partial decay width and mass distributions of f1(1285)→πKK¯ are evaluated. We get a value for the partial decay width which, within errors, is in fair agreement with the experimental result. The contribution from the tree level diagrams is dominant, but the final state interactions have effects in the mass distributions. The predicted mass distributions are significantly different from phase s…

Statistical analysis of very high-resolution precipitation data and relation to atmospheric circulation in Central Germany

2019

The cumulative occurrence of heavy precipitation and flood events during recent years in various Central European locations emphasises the urgent need to improve extreme rainfall observations and forecasts. Precipitation gauges based on a weighing system allow the recording of intense short-term precipitation events with a very high temporal resolution (down to 1 min). In this study, observational data that were collected during the period 2000 to 2016 for 126 stations of two corresponding measuring networks in the Central German state of Hesse were investigated for the first time to answer the following questions: (1) Are the recorded high-resolution precipitation data plausible and…