Revista Cubana de Física
The Revista Cubana de Fisica (RCF, Cuban Journal of Physics) is a biannual open access journal (e-ISSN 2224-7939, p-ISSN 0253-9268) published by the Cuban Physical Society (SCF) and the School of Physics of the University of Havana (FF-UH) solely funded by its publishers (without charges to the authors). Three types of articles are considered for publications: Regular Original Articles, Original Short Articles and Review Articles. Likewise, the RCF includes other several sections as: Moments of the Cuban Physics, For Physics and Non-Physics, News and Obituaries. Concerning the language, manuscripts in Spanish as weel as in English are welcome in Microsoft Office Word (.doc or .docx) and LaTex (.tex) formats. The peer-review is blind and performed by external reviewers outside the editorial team of the RCF, the SCF or the FF-UH.
- The Scientific Method, Problem Resolution and its Training in Engineering Careerspor F. L. Repilado-Ramírez el diciembre 10, 2023 a las 4:36 pm
A methodological variant is suggested to develop General Physics problem solving classes in Engineering careers, which has as its basic idea: to favor the understanding and application of the logic of the scientific method from the perspective of the G. Pólya approach to face and solve those problems. As an illustrative example, a Mechanics problem solved using these criteria is shown.
- Effectiveness of Flip—Book Optic Devices based on Problem-Based Learning Assisted with Virtual Laboratory Simulation to Improve High School Students’ Visual Representationpor R. Sebastian el diciembre 10, 2023 a las 4:30 pm
Optical devices are a complex material, most of the concepts are related to abstraction and visualization such as the formation of shadows and light trails, so that a good visual representation is needed to achieve this material competence. Visual representation in physics learning is important, but some teachers still find it difficult to instill this ability due to media constraints. Therefore, this study uses PBL-based flip-book media assisted by virtual laboratory simulations to overcome this problem. This study aims to determine the effectiveness of PBL-based flip-books assisted by Virtual Laboratory Simulation in improving students' visual representation skills on optical instrument material. The method used is quantitative with quasi-experimental methods, pretest and posttest through instruments based on visual representation indicators. The results of this study indicate that the use of PBL-based flip-books assisted by Virtual Simulation has a positive effect on students' visual representation abilities. This is shown in the acquisition of the N-Gain value of 0.828 in the high category. This study concludes that the use of PBL-based flip-books assisted by virtual lab simulations improves students' visual representation abilities.
- Influence of the Dip and Spin Coating Methods on the Seeding for the Growing of CuO Nanorods by a Hydrothermal Techniquepor S. Fortuné el diciembre 10, 2023 a las 4:18 pm
Copper II oxide (CuO) nanostructures based solar cell have a great potential due to the optimal absorber characteristic of this materials. Furthermore, CuO is stable, composed by abundant elements in the Earth's crust and can be obtained by inexpensive and simple synthesis methods. We are presenting an inverted structure in which p-CuO nanorods (NRs) are grown on top of TCO (transparent conductive oxide) by the CBD (Chemical Bath Deposition) technique, followed by ZnO nanostructures as electron transport material. We have studied some interesting problems like the inuence of diverse thermal treatment into the morphological characteristics of the CuO nanorods as well as the ZnO decoration process. The obtained materials are characterized by means of SEM, XRD and Raman spectroscopy. The results give some insights towards the optimization of the proposed solar device
- Modification of Sugarcane Bagasse Derivatives with Superparamagnetic Iron Oxide Nanoparticles for the Extraction of Hydrocarbonspor O. García-Zaldívar el diciembre 10, 2023 a las 4:09 pm
In this work, composites of magnetite nanoparticles embedded in sugarcane bagasse are obtained and characterized. The quasi-spherical shaped iron oxide nanoparticles, obtained by chemical methods, as well as the composite samples were physically characterized by different techniques. The diffraction patterns of the samples together with the EDX mapping of iron atoms on the surface of the samples confirm the homogeneous distribution of nanoparticles in these materials. . The resulting composite materials retain the adsorption/absorption capacity of the bagasse as well as the superparamagnetic properties of the magnetite nanoparticles. These two combined properties facilitate the application of the nanocomposites as a hydrocarbon adsorbent material, with the potential to be easily extracted from the medium by means of an external magnetic field. The magnetic extraction of hydrocarbons broadens the versatility of the applications of the composite material described here, facilitating its dispersion in large areas of water without the need of barriers for its collection, representing a wonderful alternative for the remediation of uncontrolled oil spills.
- Malus's Law Revisitedpor V. V. Ivchenko el diciembre 10, 2023 a las 4:05 pm
We generalize Malus's law for elliptically and partially polarized light. We also propose an easy way to determine the degree of polarization of a polarizer.