737 resultados para 1542


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Banco del conocimiento

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In this study, methods of media literacy instruction including analytic activities, production activities, and a combination of analytic and production activities were compared to determine their influence on grade 8 students' knowledge, attitudes, and behaviours towards commercials. The findings showed that media literacy instruction does improve media literacy skills. Specifically, activities that included an analytic component or an analytic and production component were significantly better than activities that included a production component. Participants that completed analytic or analytic and production activities were able to discern media-related terms, target audience, selling techniques, social values, and stereotypes in commercials better than participants that completed only production activities. The research findings also showed obstacles when teaching media literacy. When engaged in analytic activities, the difficulties included locating suitable resources, addressing the competition from commercials, encouraging written reflection, recognizing social values, and discussing racial stereotypes. When engaged in production activities, the difficulties were positioning recording stations, managing group work, organizing ideas, filming the footage, computer issues, and scheduling time. Strategies to overcome these obstacles are described.

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Tesis (Maestría en Enseñanza Superior) UANL

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UANL

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UANL

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Stories of artists who were arrested and accused of spying while drawing landscape remain relatively unknown in the history of open-air drawing in the Renaissance period, when landscape raised new aesthetic issues as well as strategic and military tensions. This article focuses on Francisco de Holanda, a Portuguese artist who travelled through Italy between 1538 and 1542. Having embarked on a visual-spying mission of the peninsula's fortresses, he wrote essays on drawing and painting in which landscape representation took on a strategic dimension ans was celebrated as such. At the same time, treatises on the 'art of travelling' provided a great deal of advice on how to draw and map foreign territories 'without raising suspicion', while treatises on fortification often addressed military secret. Examining the figure of the draughtsman together with his graphic production at the service of art or war leads to a wider reflection on the development of a certain vision of landscape in the modern West.

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The cobalt(III) complex, [Co(L)2(N3)2]2(ClO4)2, L being a Schiff base N-[phenyl(pyridin-2-yl)methylene]aniline has been synthesized and the crystal structure determined using X-ray crystallography. The complex crystallizes in triclinic system, space group P-1 with unit cell parameters a=10.9367(9) , b=18.0817(17) , c=20.1629(16) , α=111.341(2), β=91.622(2), γ=107.5030(10), V=3499.1(5) 3 and Z=2. It crystallizes with two independent molecules in the asymmetric unit. The two cobalt atoms are hexa-coordinate and have a distorted octahedral geometry, satisfied by four nitrogen atoms from two molecules of the Schiff base and two nitrogen atoms from the monodentate azide group. The perchlorate ions are non-coordinating.

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At present, a fraction of 0.1 - 0.2% of the patients undergoing surgery become aware during the process. The situation is referred to as anesthesia awareness and is obviously very traumatic for the person experiencing it. The reason for its occurrence is mostly an insufficient dosage of the narcotic Propofol combined with the incapability of the technology monitoring the depth of the patient’s anesthetic state to notice the patient becoming aware. A solution can be a highly sensitive and selective real time monitoring device for Propofol based on optical absorption spectroscopy. Its working principle has been postulated by Prof. Dr. habil. H. Hillmer and formulated in DE10 2004 037 519 B4, filed on Aug 30th, 2004. It consists of the exploitation of Intra Cavity Absorption effects in a two mode laser system. In this Dissertation, a two mode external cavity semiconductor laser, which has been developed previously to this work is enhanced and optimized to a functional sensor. Enhancements include the implementation of variable couplers into the system and the implementation of a collimator arrangement into which samples can be introduced. A sample holder and cells are developed and characterized with a focus on compatibility with the measurement approach. Further optimization concerns the overall performance of the system: scattering sources are reduced by re-splicing all fiber-to-fiber connections, parasitic cavities are eliminated by suppressing the Fresnel reflexes of all one fiber ends by means of optical isolators and wavelength stability of the system is improved by the implementation of thermal insulation to the Fiber Bragg Gratings (FBG). The final laser sensor is characterized in detail thermally and optically. Two separate modes are obtained at 1542.0 and 1542.5 nm, tunable in a range of 1nm each. Mode Full Width at Half Maximum (FWHM) is 0.06nm and Signal to Noise Ratio (SNR) is as high as 55 dB. Independent of tuning the two modes of the system can always be equalized in intensity, which is important as the delicacy of the intensity equilibrium is one of the main sensitivity enhancing effects formulated in DE10 2004 037 519 B4. For the proof of concept (POC) measurements the target substance Propofol is diluted in the solvents Acetone and DiChloroMethane (DCM), which have been investigated for compatibility with Propofol beforehand. Eight measurement series (two solvents, two cell lengths and two different mode spacings) are taken, which draw a uniform picture: mode intensity ratio responds linearly to an increase of Propofol in all cases. The slope of the linear response indicates the sensitivity of the system. The eight series are split up into two groups: measurements taken in long cells and measurements taken in short cells.

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Recurso electrónico sobre la Historia de España (Los Reyes Católicos, Carlos I y Felipe II) dirigida a alumnos de cuarto curso de enseñanza secundaria obligatoria, aunque puede ser utilizado para otros cursos y etapas. Se trata de materiales que van enfocados muy particularmente a su divulgación a través de las pizarras digitales y que contribuye a alcanzar los objetivos establecidos en los Decretos de currículo de la Región de Murcia.

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Relato ilustrado en forma de cuento sobre la biografía de Charles Darwin cuyo objetivo es acercar la Ciencia a los niños y que ésta sea entendida por los más pequeños desde sus primeras lecturas. La publicación incluye dos páginas con actividades.

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Esta investigación consiste en la identificación de oportunidades para la empresa CIMA N.T.I., perteneciente al sector TIC en España. Se busca extraer el mayor beneficio posible, del actual contexto de crisis económica a nivel mundial.