20,756 research outputs found
Campo eléctrico y potencia eléctrico
GuÃa de laboratorio No. 3 para la materia: Electricidad y Magnetismo
Uso de instrumentos de medición eléctrica ( Parte I )
GuÃa de laboratorio No. 1 para la materia: Electricidad y Magnetismo
UFGM - 2006 Annual Report
INGV, SEZIONE DI CATANIAPublished2.6. TTC - Laboratorio di gravimetria, magnetismo ed elettromagnetismo in aree attiveope
Students frequently ask: ‘Yes but...What is the utility of physics?’
Two Teaching Innovation Projects were carried out in the framework of the subjects ‘Physics I’ and ‘Physics II’ for different Degrees on Engineering at the Engineering High School of the University of Cadiz, Spain, during the 2013-2014 course. The aim of these Projects was to catch the interest of first course students on physical phenomena and principles, a matter frequently considered as ‘difficult’ or even ‘boring’ for them when it is approached from an excessively formal scope. The methodology of the two Projects was based on experiments of Recreational Physics, different toys and devices, and other resources as posters, books and online contents. The Projects were conducted during Theory, Laboratory, and Online classes of Physics I and II, and their results were evaluated from questionnaires to the students. Main conclusions derived from them were: i) a significant increment on the interest of students on Physics and Science; ii) the aim of students for learning more about this kind of recreational physical experiments; and iii) a general sensation of enjoying the study and analysis of physical phenomena by students –and teachers as well–. In addition, students manifested their interest in this methodology to be applied to other Engineering subjects of their Degrees
Surface doping in T6/ PDI-8CN2 Heterostructures investigated by transport and photoemission measurements
In this paper, we discuss the surface doping in sexithiophene (T6) organic
field-effect transistors by PDI-8CN2. We show that an accumulation
heterojunction is formed at the interface between the organic semiconductors
and that the consequent band bending in T6 caused by PDI-8CN2 deposition can be
addressed as the cause of the surface doping in T6 transistors. Several
evidences of this phenomenon have been furnished both by electrical transport
and photoemission measurements, namely the increase in the conductivity, the
shift of the threshold voltage and the shift of the T6 HOMO peak towards higher
binding energies.Comment: 5 pages, 5 figure
Photodiodes based in La0.7Sr0.3MnO3/single layer MoS2 hybrid vertical heterostructures
The fabrication of artificial materials by stacking of individual
two-dimensional (2D) materials is amongst one of the most promising research
avenues in the field of 2D materials. Moreover, this strategy to fabricate new
man-made materials can be further extended by fabricating hybrid stacks between
2D materials and other functional materials with different dimensionality
making the potential number of combinations almost infinite. Among all these
possible combinations, mixing 2D materials with transition metal oxides can
result especially useful because of the large amount of interesting physical
phenomena displayed separately by these two material families. We present a
hybrid device based on the stacking of a single layer MoS2 onto a lanthanum
strontium manganite (La0.7Sr0.3MnO3) thin film, creating an atomically thin
device. It shows a rectifying electrical transport with a ratio of 103, and a
photovoltaic effect with Voc up to 0.4 V. The photodiode behaviour arises as a
consequence of the different doping character of these two materials. This
result paves the way towards combining the efforts of these two large materials
science communities.Comment: 1 table, 4 figures (+9 supp. info. figures
La imagen del magnetismo animal en la literatura de ficción : los casos de Poe, Doyle y Du Maurier
En el presente trabajo nos acercamos a la imagen social del fenómeno conocido como mesmerismo o magnetismo animal a través del análisis de las obras: The Facts in the Case of Mr. Valdemar (1845) de Edgar Allan Poe, The Great Keinplatz Experiment (1885) de Conan Doyle y Trilby (1894) de George Du Maurier. Mostraremos cuál es el estereotipo del magnetizador y los usos que observamos del mesmerismo. Nos acercaremos a los espacios y actores del trasunto mesmerico presentado en los relatos. Tendremos en cuenta la recepción por parte del público de estas historias y las relaciones con los conocimientos mesmericos e hipnóticos que tenÃan los autores de éstas. En la actualidad, investigadores académicos, dentro de la disciplina de la psicologÃa, publican artÃculos y libros sobre los mitos populares de la hipnosis intentando poner de manifiesto las imágenes distorsionadas referentes a este fenómeno. Esta imagen distorsionada del proceso hipnótico, y del hipnotizador, proviene de los espectáculos circenses de hipnosis (stage hypnosis), del cine, de la televisión y de la literatura de ficción. Por otro lado, tenemos en la literatura de ficción una fuente única e inestimable de datos, ideas, especulaciones, preocupaciones y posibilidades en torno al magnetismo animal e hipnosis que convierten su estudio y análisis en un capÃtulo imprescindible de cualquier trabajo histórico de este tema. Veremos cómo el uso literario del mesmerismo en el caso de Poe, Doyle y Du Maurier no es algo casual o periférico, sino que todos ellos estuvieron intelectualmente interesados y estimulados por estas ideas
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