432 research outputs found

    Methodology for the metric restoration of the historical cartography applied to Francisco Coello's cartografic series of the Royal Site of Aranjuez

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    Hojas Kilométricas (Kilometric Sheets). Specifically, the study focuses on those sheets referring to the city centre and surrounding area of the Royal Site of Aranjuez, a town in the south of the Province of Madrid. The aim of this study is to restore the actual size and measurements of scanned images of the Hojas Kilométricas. This would allow us, among other things, to reestablish both the format and scale of the original plans. To achieve this goal it is necessary to rectify and then georeference these images, i.e. assign them a geographic reference system. This procedure is essential in the overlaying and comparison of the Hojas Kilométricas of the Royal Site with other historical cartography as well as other sources related to the same area from different time periods. Subsequent research would allow us, for example, to reconstruct the time-evolution of the urban area, to spot new construction and to pinpoint the locations of any altered or missing buildings or architectural features. In addition, this would allow us to develop and integrate databases for GIS models applicable to the management of our cultural heritage

    A Statistical Inverse Method for Gridding Passive Microwave Data with Mixed Measurements

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    When a passive microwave footprint intersects objects on the ground with different spectral characteristics, the corresponding observation is mixed. The retrieval of geophysical parameters is limited by this mixture. We propose to partition the study region into objects following an object-based image analysis procedure and then to refine this partition into small cells. Then, we introduce a statistical method to estimate the brightness temperature (TB) of each cell. The method assumes that TB of the cells corresponding to the same object is identically distributed and that the TB heterogeneity within each cell can be neglected. The implementation is based on an iterative expectation-maximization algorithm. We evaluated the proposed method using synthetic images and applied it to grid the TBs of sample AMSR -2 real data over a coastal region in Argentina.Fil: Grimson, Rafael. Universidad Nacional de San Martín; ArgentinaFil: Bali, Juan Lucas. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Rajngewerc, Mariela. Ministerio de Defensa. Instituto de Investigaciones Científicas y Técnicas para la Defensa; ArgentinaFil: Martin, Laura San. Universidad Nacional de San Martín; ArgentinaFil: Salvia, Maria Mercedes. Universidad Nacional de San Martín; Argentina. Consejo Nacional de Investigaciónes Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Astronomía y Física del Espacio. - Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Astronomía y Física del Espacio; Argentin

    Nursing students' perceptions of the efficacy of narrative photography as a learning method : A cross-sectional study

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    Although active learning methodologies promote students' creativity and motivation regarding learning objectives, traditional unidirectional teaching methods remain more common. The objective of this study was to determine nursing students' perceptions regarding the efficacy of narrative photography as a learning method, including self-perceived satisfaction. Narrative photography is an art-based technique inspired by Photovoice that promotes empathy, creativity, and reflection. A cross-sectional study was conducted using a nonprobabilistic sample of 66 nursing students from a public university in Barcelona, Spain. Quantitative and qualitative data were collected anonymously using an electronic tool. Descriptive statistics and thematic analyses were used to analyze the data. Sixty valid questionnaires were returned. The respondents found narrative photography's ability to promote creativity and assist understanding of theory to be its most satisfying aspect (>95% somewhat/totally agree). Narrative photography's usefulness, ability to foster self-criticism, and the associated workload was the least satisfactory aspect (>55% somewhat/totally agree). Significant differences regarding satisfaction levels were found for both age and sex. Narrative photography is a helpful and satisfactory learning method, especially for promoting creativity and understanding theoretical concepts

    PETRHA (Physioterapy E-Training Re-habilitación)

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    PETRHA (Physiotherapy E-Training Re-HAbilitation), is an European project that is being developed since 2015 to 2017. His main goal is to develop a serious game for students in Physiotherapy. This simulation game will enhance the learning process of the "clinical approach in physiotheray" and will allow more intensive training opportunities for students in association with the use of simulation.info:eu-repo/semantics/publishedVersio

    Airtightness and indoor air quality in subsidised housing in Spain

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    Over three million subsidised dwellings were built in Spain between 1940 and 1980. Most of these buildings are now obsolete and fail to comply with thermal comfort and ventilation standards. A building's existing energy performance, including its airtightness, should be determined prior to conducting low-energy refurbishment, for those factors, particularly the latter, impact thermal comfort, energy demand and indoor air quality (IAQ) fairly heavily. This paper introduces a study on airtightness and IAQ in subsidised housing built in Spain in the aforementioned 40-year period. Airtightness and CO2 measurements taken in 2014-2015 in six units in multi-dwelling buildings, three each in Seville and Madrid, are described. The results show that in a building in Madrid, the number of air changes per hour at a pressure of 50 Pa (n50) ranges from 3.2 to 8.3. The winter time CO2 concentration in bedrooms is 1900 ppm and in living rooms 1400 ppm, with peaks of 5000 ppm and 4700 ppm, respectively. The number of air changes per hour at 50 Pa (n50) in Seville, ranges from 5.0 to 9.5. The winter time CO2 concentration in bedrooms is 1500 ppm and in living rooms 800 ppm, with peaks of 6000ppm and 4000 ppm, respectively. In the summer, however, when users tend to open windows at night primarily to let in cooler air, the CO2 concentration values observed in Seville drop to 700 ppm and in Madrid to 1100 ppm. As those values are much higher than recommended in the standards on good indoor air quality, the inference is that winter time housing ventilation must not be allowed to rest solely on users’ voluntary opening of windows

    Understanding the expectations of nursing students following the first clinical internship: A qualitative study

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    "This study aimed to describe how nursing students' expectations are achieved in their first clinical internship, as part of a longitudinal qualitative study conducted in a public nursing school in Barcelona, Spain. Data in the current phase were collected in 2019 from students (n = 15) after completing an internship for the first time, recruited with purposive sampling until data saturation was reached in semi-structured interviews, and thematic analysis was performed on the interview content. Positive factors that had a powerful influence on students included the accessibility at the internship location and the experience with the clinical instructor, when these provided assessment and integration of the student in the health team. Practical learning is mediated by chance in terms of the center, service, teacher, and clinical instructor assigned. It is crucial to establish consensual measures among all the actors involved to facilitate the efficacy of teaching and learning.

    Low precision matrix multiplication for efficient deep learning in NVIDIA Carmel processors

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    [EN] We introduce a high performance, multi-threaded realization of the gemm kernel for the ARMv8.2 architecture that operates with 16-bit (half precision)/queryKindly check and confirm whether the corresponding author is correctly identified. floating point operands. Our code is especially designed for efficient machine learning inference (and to a certain extent, also training) with deep neural networks. The results on the NVIDIA Carmel multicore processor, which implements the ARMv8.2 architecture, show considerable performance gains for the gemm kernel, close to the theoretical peak acceleration that could be expected when moving from 32-bit arithmetic/data to 16-bit. Combined with the type of convolution operator arising in convolutional neural networks, the speed-ups are more modest though still relevant.This work was supported by projects TIN2017-82972-R and RTI2018-093684-B-I00 from the Ministerio de Ciencia, Innovacion y Universidades, project S2018/TCS-4423 of the Comunidad de Madrid, project PR65/19-22445 of the UCM, and project Prometeo/2019/109 of the Generalitat Valenciana.San Juan-Sebastian, P.; Rodríguez-Sánchez, R.; Igual, FD.; Alonso-Jordá, P.; Quintana-Ortí, ES. (2021). Low precision matrix multiplication for efficient deep learning in NVIDIA Carmel processors. The Journal of Supercomputing. 77(10):11257-11269. https://doi.org/10.1007/s11227-021-03636-41125711269771

    Staphylococcus aureus poststernotomy mediastinitis: Description of two distinct acquisition pathways with different potential preventive approaches

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    ObjectiveDetermining the acquisition routes of infection is crucial to designing specific preventive approaches against Staphylococcus aureus poststernotomy mediastinitis.MethodsFrom 2002 to 2004, a nasal sample was obtained from patients before cardiac surgery. We collected clinical and microbiologic data of all episodes of S aureus poststernotomy mediastinitis. A case–control study (3:1) was performed to confirm the role of previous preoperative nasal colonization by S aureus as a risk factor for S aureus poststernotomy mediastinitis. Pulsed field gel electrophoresis molecular analysis of nasal and surgical site S aureus isolates was performed to analyze their relatedness in each patient with poststernotomy mediastinitis and with other patients of the study cohort.ResultsS aureus nasal cultures were positive in 228 (15.9%) of 1432 patients: methicillin-susceptible S aureus in 222 (15.5%) and meticillin-resistant S aureus in 6 (0.4%). S aureus poststernotomy mediastinitis was diagnosed in 17 (1.2%) of 1432 patients: 9 (3.95%) of 228 in colonized patients versus 8 (0.66%) of 1204 in noncolonized patients (P < .0001). Seven of 9 patients (1.2%) with methicillin-susceptible S aureus had an identical isolate by pulsed field gel electrophoresis in preoperative nasal and surgical-site cultures, but no clonal relatedness was shown among the isolates from these 9 patients. None of the 8 patients with methicillin-resistant S aureus poststernotomy mediastinitis had an identical isolate by pulsed field gel electrophoresis in preoperative nasal and surgical-site cultures, and the same clone of methicillin-resistant S aureus was responsible for all these cases.ConclusionsNasal colonization often precedes methicillin-resistant S aureus poststernotomy mediastinitis, which suggests that decontamination is adequate for preventing methicillin-resistant S aureus poststernotomy mediastinitis, whereas hospital infection control measures seem to be the major factor for preventing methicillin-resistant S aureus poststernotomy mediastinitis

    Feasibility report of conservative surgery, perioperative high-dose-rate brachytherapy (PHDRB), and low-to-moderate dose external beam radiation therapy (EBRT) in pediatric sarcomas

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    This study was undertaken to determine the feasibility of perioperative high-dose-rate brachytherapy (PHDRB) as an accelerated boost in patients with pediatric sarcomas. METHODS AND MATERIALS: Five pediatric patients (ages 7-16) with soft tissue sarcomas (STS) or soft tissue recurrences of previously treated osteosarcomas were treated with surgical resection and PHDRB (16-24 Gy) for R0-R1 resections. Patients with STS and osteosarcomas received 27 Gy and 45 Gy of EBRT postoperatively. RESULTS: After a median follow-up of 27 months (range, 12-50) all the patients remain locally controlled. Only 1 patient developed regrowth of pulmonary metastases and died of distant disease at 16 months. CONCLUSIONS: The use of PHDRB is safe in the short-term in this pediatric population. Only 1 patient suffered a partial wound dehiscence that may not be entirely related to PHDRB. Patients with recurrent osteosarcomas can be treated in a fashion similar to their adult soft tissue counterparts and avoid limb amputation. Younger patients with STS may achieve local control and prevent growth retardation with a combination of PHDRB and moderate doses of EBR

    Daptomycin Plus Fosfomycin Versus Daptomycin Alone for Methicillin-resistant Staphylococcus aureus Bacteremia and Endocarditis: A Randomized Clinical Trial

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    Bacteremia; Daptomycin; FosfomycinBacterièmia; Daptomicina; FosfomicinaBacteriemia; Daptomicina; FosfomicinaBackground We aimed to determine whether daptomycin plus fosfomycin provides higher treatment success than daptomycin alone for methicillin-resistant Staphylococcus aureus (MRSA) bacteremia and endocarditis. Methods A randomized (1:1) phase 3 superiority, open-label, and parallel group clinical trial of adult inpatients with MRSA bacteremia was conducted at 18 Spanish hospitals. Patients were randomly assigned to receive either 10 mg/kg of daptomycin intravenously daily plus 2 g of fosfomycin intravenously every 6 hours, or 10 mg/kg of daptomycin intravenously daily. Primary endpoint was treatment success 6 weeks after the end of therapy. Results Of 167 patients randomized, 155 completed the trial and were assessed for the primary endpoint. Treatment success at 6 weeks after the end of therapy was achieved in 40 of 74 patients who received daptomycin plus fosfomycin and in 34 of 81 patients who were given daptomycin alone (54.1% vs 42.0%; relative risk, 1.29 [95% confidence interval, .93–1.8]; P = .135). At 6 weeks, daptomycin plus fosfomycin was associated with lower microbiologic failure (0 vs 9 patients; P = .003) and lower complicated bacteremia (16.2% vs 32.1%; P = .022). Adverse events leading to treatment discontinuation occurred in 13 of 74 patients (17.6%) receiving daptomycin plus fosfomycin, and in 4 of 81 patients (4.9%) receiving daptomycin alone (P = .018). Conclusions Daptomycin plus fosfomycin provided 12% higher rate of treatment success than daptomycin alone, but this difference did not reach statistical significance. This antibiotic combination prevented microbiological failure and complicated bacteremia, but it was more often associated with adverse events.This work was supported by the Spanish Ministry of Science, Innovation and Universities (PI12/01907); Spanish Network for Research in Infectious Diseases (RD16/0016/0005); Instituto de Salud Carlos III (ISCIII); and Spanish Ministry of Economy, Industry and Competitiveness. This work was also supported by the European Development Regional Fund “A way to achieve Europe,” Operational Programme Intelligent Growth 2014–2020; Spanish Clinical Research Network (SCReN), co-financed by the Plan Nacional de I+D and ISCIII, Subdirección General de Evaluación y Fomento de la Investigación (PT13/0002/0007); and the Grupo de Estudio de la Infección Relacionada con la Asistencia Sanitaria. J. M.-M. received a personal 80:20 research grant from the Institut d’Investigacions Biomèdiques Agust Pi i Sunyer, Barcelona, Spain, during 2017–2021
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