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Search Results: 1 - 10 of 350978 matches for " S.; Ma?eru "
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Radioterapia con partículas pesadas
Lozares,S.; Maeru,F.; Pellejero,S.;
Anales del Sistema Sanitario de Navarra , 2009, DOI: 10.4321/S1137-66272009000400009
Abstract: the characteristics of radiation formed by heavy particles make it a highly useful tool for therapeutic use. protons, helium nuclei or carbon ions are being successfully employed in radiotherapy installations throughout the world. this article sets out the physical and technological foundations that make these radiation particles suitable for attacking white volume, as well as the different ways of administering treatment. next, the main clinical applications are described, which show the therapeutic advantages in some of the pathologies most widely employed in proton and hadrontherapy centres at present. under continuous study, the clinical use of heavy particles appears to be an enormously promising path of advance in comparison with classical technologies, both in tumour coverage and in reducing dosages in surrounding tissue.
Descripción de equipos de última generación en radioterapia externa
Pellejero,S.; Lozares,S.; Maeru,F.;
Anales del Sistema Sanitario de Navarra , 2009, DOI: 10.4321/S1137-66272009000400002
Abstract: both the planning systems and the form of administering radiotherapy have changed radically since the introduction of 3d planning. at present treatment planning based on computerised axial tomography (cat) images is standard practice in radiotherapy services. in recent years lineal accelerators for medical use have incorporated technology capable of administering intensity modulated radiation beams (imrt). with this mode distributions of conformed doses are generated that adjust to the three dimensional form of the white volume, providing appropriate coverage and a lower dose to nearby risk organs. the use of imrt is rapidly spreading amongst radiotherapy centres throughout the world. this growing use of imrt has focused attention on the need for greater control of the geometric uncertainties in positioning the patient and control of internal movements. to this end, both flat and volumetric image systems have been incorporated into the treatment equipment, making image-guided radiotherapy (igrt) possible. this article offers a brief description of the latest advances included in the planning and administration of radiotherapy treatment.
Radioterapia con partículas pesadas Heavy particle radiation therapy
S. Lozares,F. Maeru,S. Pellejero
Anales del Sistema Sanitario de Navarra , 2009,
Abstract: Las características de la radiación constituida por partículas pesadas la convierten en una herramienta muy útil para el uso terapéutico. Los protones, los núcleos de helio o los iones de carbono están siendo empleados con éxito en instalaciones radioterápicas de todo el mundo. En este trabajo se exponen los fundamentos físicos y tecnológicos que convierten a estas partículas en radiación adecuada para atacar los volúmenes blanco, así como las distintas maneras de administrar tratamientos. Posteriormente se describen las principales aplicaciones clínicas que muestran las ventajas terapéuticas en algunas de las patologías más empleadas en centros de protón y hadrón-terapia en la actualidad. En continuo estudio, el uso clínico de partículas pesadas se presenta como una vía de avance enormemente prometedora frente a las tecnologías clásicas, tanto en cobertura tumoral como en reducción de dosis en el tejido circundante. The characteristics of radiation formed by heavy particles make it a highly useful tool for therapeutic use. Protons, helium nuclei or carbon ions are being successfully employed in radiotherapy installations throughout the world. This article sets out the physical and technological foundations that make these radiation particles suitable for attacking white volume, as well as the different ways of administering treatment. Next, the main clinical applications are described, which show the therapeutic advantages in some of the pathologies most widely employed in proton and hadrontherapy centres at present. Under continuous study, the clinical use of heavy particles appears to be an enormously promising path of advance in comparison with classical technologies, both in tumour coverage and in reducing dosages in surrounding tissue.
Descripción de equipos de última generación en radioterapia externa Description of latest generation equipment in external radiotherapy
S. Pellejero,S. Lozares,F. Maeru
Anales del Sistema Sanitario de Navarra , 2009,
Abstract: Tanto los sistemas de planificación como la forma de administración de los tratamientos radioterápicos han cambiado radicalmente desde la introducción de la planificación tridimensional 3D. En la actualidad la planificación de los tratamientos basada en imágenes de tomografía axial computarizada (TAC) es el estándar de los servicios de radioterapia. En los últimos a os los aceleradores lineales para uso médico, han incorporando tecnología capaz de administrar haces de tratamiento de intensidad modulada, IMRT. Con esta modalidad se generan distribuciones de dosis altamente conformadas que se ajustan a la forma tridimensional del volumen blanco, proporcionando una cobertura adecuada y una menor dosis a los órganos de riesgo cercanos. El uso de la IMRT rápidamente se está extendiendo entre los centros de radioterapia de todo el mundo. Este creciente uso de la IMRT ha focalizado la atención en la necesidad de un mayor control de las incertidumbres geométricas en el posicionamiento del paciente y un control de los movimientos internos, por ello se han incorporado a los equipos de tratamiento sistemas de imagen tanto planar como volumétrica, que posibilitan una radioterapia guiada por la imagen, IGRT. En este trabajo se presenta una breve descripción de los últimos avances incorporados a la planificación y administración del tratamiento radioterápico. Both the planning systems and the form of administering radiotherapy have changed radically since the introduction of 3D planning. At present treatment planning based on computerised axial tomography (CAT) images is standard practice in radiotherapy services. In recent years lineal accelerators for medical use have incorporated technology capable of administering intensity modulated radiation beams (IMRT). With this mode distributions of conformed doses are generated that adjust to the three dimensional form of the white volume, providing appropriate coverage and a lower dose to nearby risk organs. The use of IMRT is rapidly spreading amongst radiotherapy centres throughout the world. This growing use of IMRT has focused attention on the need for greater control of the geometric uncertainties in positioning the patient and control of internal movements. To this end, both flat and volumetric image systems have been incorporated into the treatment equipment, making image-guided radiotherapy (IGRT) possible. This article offers a brief description of the latest advances included in the planning and administration of radiotherapy treatment.
Creating Scenarios and Guiding Learning in a Medical Simulation Center  [PDF]
Gregorio Maeru Zunzarren, Alfredo Rodriguez-Sedano
Creative Education (CE) , 2011, DOI: 10.4236/ce.2011.23044
Abstract: In this article we propose to address the importance of learning scenarios in a simulation center in graduate studies in Medicine. We will describe in detail the context in which this learning is developed. To do this, we need to reflect briefly on the contents that permit the configuration of these scenarios as teaching units, the objectives which should be commensurate with the level of training and experience of the students, the activities to develop and the means by which these are arranged, and, finally, the evaluation of the process. The development of this learning would not be possible without an activity guide, as a well as an evolution and debriefing stage.
PROPUESTA PARA ABORDAR EL QUé Y CóMO ENSE AR LAS HABILIDADES MOTRICES EN SECUNDARIA: UN EJEMPLO A TRAVéS DEL PATINAJE | PROPOSAL TO DEAL WITH THE 'WHAT' AND 'HOW' TEACH MOTOR SKILLS IN SECONDARY PHYSICAL EDUCACION: AN EXAMPLE OF INLINE SKATING
Juan Maeru-Cámara,Hugo Rodríguez-Campazas
ágora para la Educación Física y el Deporte , 2011,
Abstract: RESUMEN.- Uno de los contenidos que han acabado conformando las se as de identidad de la Educación Física Escolar es el de las Habilidades Motrices. En el presente artículo pretendemos mostrar nuestra forma particular de entenderlas y abordar su desarrollo en la etapa de secundaria. Para ello, tras exponer nuestras ideas respecto a este contenido y las características del contexto en el que hemos venido desarrollando nuestro trabajo, mostramos, a modo de ejemplo, el dise o y posterior desarrollo de una Unidad Didáctica concreta, sobre el patinaje en línea.En todo momento relacionamos y justificamos nuestro trabajo desde la legislación vigente, pero también desde el aval que, para nosotros, constituyen los numerosos documentos que nuestro alumnado ha generado a lo largo del proceso. Creemos que estos documentos reflejan fragmentos de nuestra particular contribución al desarrollo de sus capacidades (competencias), desde la concepción integral del alumno que preside nuestra idea de educación.Como exponemos en las conclusiones, consideramos que las claves metodológicas expuestas en el artículo podrían configurarse, como sucede en nuestro caso, en puntos de una guía válida no sólo para abordar el desarrollo de las habilidades motrices, sino también del resto de contenidos de la actual Educación Física Escolar.ABSTRACT.- Motor skills is one of the most influential contents in the shaping of the identity of PE. In this paper, we'll show our understanding of this PE content and the way we approach its development in the Secondary Education.To do so, we expose first our conception of this content and the features of the context in which we have developed our work. Then, we show, as an example, the design and subsequent development of a specific Teaching Unit about inline skating.Our work is always framed and justified by the existing curricular legislation and by the numerous documents that our students produce throughout the process. These last are for us very important because, although fragmentarily, they reflect our contribution to the development of the students' capacities and competencies (all considered within a holistic conception of education).Finally, in the conclusions we suggest that the methodological principles presented in this article might be considered, as in our case, as key points for the design and development not only of the motor skills content, but also of the other contents of PE.
Critical Reflections and contributions to a Physical Education Specialist Students practice’s program
Lucio Martínez Alvarez,Juan Maeru Cámara,Henar Rodriguez Navarro
Revista Electronica Interuniversitaria de Formación del Profesorado , 2010,
Abstract: This work is part of a bigger strategy of participative investigation-action focused on critical reflection and improvement of a Practicum program for Physical Education specialist teachers. We liked to know which were the worries expressed by the student teachers before entering the school settings, with the intention of reflecting on how the program recognizes, integrates and answers to the emotional dimension of the Practicum.In that way, there were categorized and analyzed the writings and questionnaires the students (N 54) elaborated in the preparatory phase of the Practicum of the course 08-09. Later, we contrasted these with the intentions, actions, and strategies the programmed had planned for attending the emotional dimension that arises in this stage of the practicum.In doing so, we were in better disposition to check the coherence of the programme, the principles sustaining it, and the degree which it responds to the human and social context where it is developed, so we were able to fine tune the programme, aware of the emotional dimension of the Practicum.
Effect of Arrangement of Tube Banks on Acoustic Resonance  [PDF]
Hiromitsu Hamakawa, Tatsuaki Nakamura, Kenta Asakura, Eiichi Nishida, Eru Kurihara
Open Journal of Fluid Dynamics (OJFD) , 2012, DOI: 10.4236/ojfd.2012.24A038
Abstract:

In the present paper the attention is focused on effect of arrangement of tube banks on acoustic resonance which occurred in the two-dimensional model of boiler. We have examined the characteristics of vortex shedding and acoustic resonance generated from in-line and staggered tube banks. At the small tube pitch ratio in in-line tube banks, acoustic resonance of third and fourth mode in the transverse direction occurred. As the tube pitch ratio in the flow direction decreased, the vortex shedding frequency became broad-band. The alternative vortex shed from in-line tube banks. The multiple resonance modes were generated within the broad-band vortex shedding frequency. And the acoustic resonances of lower-order modes occurred at the higher gap velocity. On the other hand, at the small tube pitch ratio in staggered tube banks, acoustic resonance did not occurred, although the vortex shed at the resonance frequency in tube banks. The pressure drop at staggered tube banks was larger than that of in-line tube banks. The symmetric vortices were observed inside staggered tube banks at the small tube pitch ratio.

Correlation between Aerodynamic Noise and Velocity Fluctuation of Tip Leakage Flow of Axial Flow Fan  [PDF]
Hiromitsu Hamakawa, Masatomo Shiotsuki, Takaaki Adachi, Eru Kurihara
Open Journal of Fluid Dynamics (OJFD) , 2012, DOI: 10.4236/ojfd.2012.24A026
Abstract: In the present paper the attention is focused on correlation between fan noise and velocity fluctuations of tip leakage vortex around rotor blade of a low pressure axial flow fan at the maximum pressure operating point. We measured time fluctuating velocity near the rotor tip around the rotor blades by using a hot-wire sensor from a relative flame of refer- ence fixed to the rotor blades. As the results, it is clear that the velocity fluctuation due to tip leakage vortex has weak periodicity and the hump portion appeared in its spectrum. If the flow rate was lower than the design condition, the tip leakage flow became to attach to the following blade and the sound pressure level at frequency of velocity fluctuation of this flow was increased. The correlation measurements between the velocity fluctuation of tip leakage flow and the aerodynamic noise were made using a rotating hot-wire sensor near the rotor tip in the rotating frame. The correlation between the velocity fluctuation due to tip leakage flow and acoustic pressure were increased due to generation of weak acoustic resonance at the maximum pressure operating point.
Aerodynamic Sound Radiated from Two-Dimensional Airfoil with Local Porous Material  [PDF]
Hiromitsu Hamakawa, Kazuki Hosokai, Takaaki Adachi, Eru Kurihara
Open Journal of Fluid Dynamics (OJFD) , 2013, DOI: 10.4236/ojfd.2013.32A009
Abstract:

In the present paper, the attention is focused on the effect of local porous material on aerodynamic sound radiated from two-dimensional airfoil. We measured the aerodynamic sound radiated from the airfoil with porous material, tripping wire and porous plate which are mounted locally on the surface of the airfoils near the leading edge. At the normal airfoil, discrete frequency noise is clearly observed at small attack angle. However, it is clear that its noise generated from the airfoil decreased with the local porous material on the surface of pressure side of the airfoil. The porous material is effective to reduce this noise compared with the others. And the sound absorbing coefficient and the air permeability were measured for test porous material. The sound absorbing coefficient increased at the high frequency band, and the air permeability became small for porous materials. As the attack angle increased, the discrete frequency noise was not generated from the normal airfoil. The broadband noises were almost same for all test airfoils.

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