99 research outputs found

    Arm robot bioloid

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    L’objectiu del projecte és fer un braç amb el robot Bioloid, i que aquest tingui agafat un got. Desprès, es pugui posar líquid (normalment aigua) i distribuir-la en dos recipients a part amb 50% de líquid a cada u

    Fallas regulatorias en el cierre de minas: el caso Quiruvilca

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    En el año 2003, se creó un marco regulatorio para los Planes de Cierre de Minas; hoy, luego de 18 años de vigencia de este marco normativo, nos encontramos en un período en el cual resulta importante evaluar su efectividad, toda vez que algunas operaciones mineras se encuentran concluyendo con sus actividades. En ese sentido, corresponde que el cierre de minas se produzca de manera coherente y que todos los costos sean asumidos por el titular minero, al ser quien obtuvo los beneficios de la operación. Así pues, el presente trabajo pretende hacer una evaluación, debido a su relevancia, del diseño, implementación y cumplimiento de las disposiciones que regulan los costos del cierre de minas y la correspondiente constitución y ejecución de las garantías de cierre. Mediante esta evaluación, se pretende evidenciar la existencia de fallas regulatorias en el diseño, implementación y cumplimiento de la referida normativa, y cómo dichas fallas pueden generar situaciones en las que sea el Estado y no el titular minero el que asuma el costo del cierre de operaciones, además de los problemas de contaminación (externalidades negativas)

    Occupational radiation exposure assessment during the management of [68Ga]Ga-DOTA-TOC

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    Background: Since it was first approved in Europe in 2016, the gallium-68 (68Ga) radiopharmaceutical [68Ga]Ga-DOTA-TOC has been widely used for imaging of somatostatin receptor (SSTR) positive tumours using positron emission tomography-computed tomography (PET/CT). Significant patient benefits have been reported, so its use is rapidly increasing. However, few studies have been published regarding occupational doses to nuclear medicine personnel handling this radiopharmaceutical, despite its manual usage at low distances from the skin and the beta-emission decay scheme, which may result in an increased absorbed dose to their hands. In this context, this study aims to analyse the occupational exposure during the administration of [68Ga]Ga-DOTA-TOC for PET/CT imaging. For this purpose, extremity, eye lens and whole-body dosimetry in terms of Hp(0.07), Hp(3) and Hp(10), respectively, was conducted on six workers with both thermoluminescent dosimeters, and personal electronic dosimeters. Results: The non-dominant hand is more exposed to radiation than the dominant hand, with the thumb and the index fingertip being the most exposed sites on this hand. Qualitative analysis showed that when no shielding is used during injection, doses increase significantly more in the dominant than in the non-dominant hand, so the use of shielding is strongly recommended. While wrist dosimeters may significantly underestimate doses to the hands, placing a ring dosimeter at the base of the ring or middle finger of the non-dominant hand may give a valuable estimation of maximum doses to the hands if at least a correction factor of 5 is applied. Personal equivalent doses for the eyes did not result in measurable values (i.e., above the lowest detection limit) for almost all workers. The extrapolated annual dose estimations showed that there is compliance with the annual dose limits during management of [68Ga]Ga-DOTA-TOC for diagnostics with PET in the hospital included in this study. Conclusions: Imaging with [68Ga]Ga-DOTA-TOC is a safe process for the workers performing the administration of the radiopharmaceutical, including intravenous injection to the patient and the pre- and post-activity control, as it is highly unlikely that annual dose limits will be exceeded if good working practices and shielding are used.Euratom research and training programme 2019?2020 under Grant Agree? ment N? 945196 (SINFONIA Projec

    Balanç de trenta anys de la Convenció sobre els Drets de l’infant

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    Assignatures: Intervenció Socioeducativa per a la Inclusió Social i Acció socioeducativa en situacions d'inclusió i exclusió socialEl vídeo que es presenta es una conferencia en el marc de les VII Jornades conjuntes entre els graus d’educació social i pedagogia en matèria d’acció socioeducativa per a la inclusió social. El títol de les jornades és: "infants i adolescents en contextos de violència familiar: drets i acció socioeducativa". La conferència te el títol "Balanç de trenta anys de la Convenció sobre els Drets de l’infant"Ajut per activitats acadèmiques de la Facultat d'Educació de la Universitat de Barcelon

    La educación inclusiva: desafíos y oportunidades para las instituciones escolares

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    Introduction. Inclusive education has become a reality full of challenges and opportunities for educational institutions. Aim. Analyze the challenges and opportunities that arise in school institutions related to inclusive education. Methodology. A descriptive methodology supported by documentary review was used, based on search criteria referring to public policies aimed at inclusion, support and guidance for teachers and the challenges and opportunities currently faced. Results. 1. The role of the school and its direct relationship with the educational and social problems that inclusion represents are confirmed. 2. Public policies aimed at inclusion are also implemented within school systems, educational centers and classrooms.3. The need to continue advising and training teachers to attend to educational diversity is confirmed.4. The challenges facing inclusive education in educational institutions are extremely complex; precisely because of the diversity that is manifested in each class group, the limitations present in teachers to carry out curricular adaptations and give timely responses to inclusion, the limited resources and the lack of adequate infrastructures5. Work in an integrated manner between school institutions, the administration and public powers together with the family are essential to turn the challenges of inclusion into real opportunities for all students. Conclusions. The relationship between public policies and the development of pedagogical and curricular actions that allow strengthening the processes of educational inclusion is corroborated. La educación inclusiva se ha convertido en una realidad llena de desafíos y oportunidades para las instituciones educativas. Objetivo. Analizar los desafíos y oportunidades que se presentan en las instituciones escolares relacionados con la educación inclusiva. Metodología. Se utilizó una metodología descriptiva apoyada en la revisión documental, sobre la base de criterios de búsqueda referentes a las políticas públicas dirigidas a la inclusión, el acompañamiento y orientación a los docentes y los desafíos y oportunidades que se enfrentan en la actualidad. Resultados. 1.  Se confirma el papel de la escuela y su relación directa con la problemática educativa y social que representa la inclusión. 2. Las políticas públicas dirigidas a la inclusión, también se implementan dentro de los sistemas escolares, centros educacionales y aulas.3. Se ratifica la necesidad de continuar asesorando y capacitando a los docentes para atender la diversidad educativa.4. Los desafíos que enfrenta la educación inclusiva en las instituciones educativas son en extremo complejos; precisamente por la diversidad que se manifiesta en cada grupo clase, las limitaciones presentes en los docentes para realizar las adaptaciones curriculares y dar respuestas oportunas a la inclusión, los limitados recursos y la carencia de infraestructuras adecuadas5.Trabajar de manera integrada entre las instituciones escolares, la  administración y poderes públicos conjuntamente con la familia resulta esencial para convertir los desafíos de la inclusión en verdaderas oportunidades para todos los estudiantes. Conclusiones.&nbsp

    Cuentos de «derechos» contados al oído

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    17 cuentos infantiles, ilustraciones y guías didácticas para trabajar a partir de la Convención de las Naciones Unidas sobre los Derechos de los Niños y las NiñasLos cuentos de este compendio y las guías didácticas que los acompañan harán referencia a los artículos del documento Convención de las Naciones Unidas sobre los Derechos de los Niños y las Niñas, promovido y elaborado por el Fondo de las Naciones Unidas para la Infancia (UNICEF). Dicho documento está a disposición pública, a través de la página web de la organización, en el siguiente enlace: https://www.unicef.es/sites/unicef.es/files/comunicacion/ConvencionsobrelosDerechosdelNino.pd

    Axially Chiral Triazoloisoquinolin-3-ylidene Ligands in Gold(I)-Catalyzed Asymmetric Intermolecular (4 + 2) Cycloadditions of Allenamides and Dienes

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    The first highly enantioselective intermolecular (4 + 2) cycloaddition between allenes and dienes is reported. The reaction provides good yields of optically active cyclohexenes featuring diverse substitution patterns and up to three stereocenters. Key to the success of the process is the use of newly designed axially chiral N-heterocyclic carbene–gold catalystsThis work was supported by the Spanish MINECO (SAF2010-20822-C02, CTQ2010-15297, CTQ2010-14974, and Consolider Ingenio 2010 CSD2007-00006), the ERDF funds, the Xunta de Galicia (INCITE09209084PR, GRC2010/12), and the Junta de Andalucía (2008/FQM-3833 and 2009/FQM-4537, predoctoral fellowship to F.G.-C). H.F. acknowledges the Fundação para a Ciência e Tecnologia (FCT, Portugal) and POPH/FSE for a Ph.D. grant (Grant SFRH/BD/60214/2009)S

    Personalized assessment of the cumulative complication risk of the atrial fibrillation ablation track: The AF-TRACK calculator

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    Atrial fibrillation (AF) ablation strategy is associated with a non-negligible risk of complications and often requires repeat procedures (AF ablation track), implying repetitive exposure to procedural risk.The purpose of this study was to develop and validate a model to estimate individualized cumulative risk of complications in patients undergoing the AF ablation track (Atrial Fibrillation TRAck Complication risK [AF-TRACK] calculator).The model was derived from a multicenter cohort including 3762 AF ablation procedures in 2943 patients. A first regression model was fitted to predict the propensity for repeat ablation. The AF-TRACK calculator computed the risk of AF ablation track complications, considering the propensity for repeat ablation. Internal (cross-validation) and external (independent cohort) validation were assessed for discrimination capacity (area under the curve [AUC]) and goodness of fit (Hosmer-Lemeshow [HL] test).Complications (N = 111) occurred in 3.7% of patients (2.9% of procedures). Predictors included female sex, heart failure, sleep apnea syndrome, and repeat procedures. The model showed fair discrimination capacity to predict complications (AUC 0.61 [0.55-0.67]) and likelihood of repeat procedure (AUC 0.62 [0.60-0.64]), with good calibration (HL χ2 12.5; P = .13). The model maintained adequate discrimination capacity (AUC 0.67 [0.57-0.77]) and calibration (HL χ2 5.6; P = .23) in the external validation cohort. The validated model was used to create the Web-based AF-TRACK calculator.The proposed risk model provides individualized estimates of the cumulative risk of complications of undergoing the AF ablation track. The AF-TRACK calculator is a validated, easy-to-use, Web-based clinical tool to calibrate the risk-to-benefit ratio of this treatment strategy.© 2022 Heart Rhythm Society. Published by Elsevier Inc

    Mixed control for discrete-time systems via convex optimization,

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    A mixed control problem for discrete-time systems is considered, where an upper bound on the norm of a closed loop transfer matrix is minimized subject to an constraint on another closed loop transfer matrix. Both state-feedback and output-feedback cases are considered. It is shown that these problems are equivalent to finite-dimensional convex programming problems. In the state-feedback case, nearly optimal controllers can be chosen to be static gains. In the output feedback case, nearly optimal controllers can be chosen to have a structure similar to that of the central single objective controller. In particular, the state dimension of nearly optimal output-feedback controllers need not exceed the plant dimension.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/31038/1/0000715.pd
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