Persona: García Gallegos, Jaime
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Instituto Nacional de Técnica Aeroespacial
El Instituto Nacional de Técnica Aeroespacial es el Organismo Público de Investigación (OPI) dependiente del Ministerio de Defensa. Además de realizar actividades de investigación científica y de desarrollo de sistemas y prototipos en su ámbito de conocimiento, presta servicios tecnológicos a empresas, universidades e instituciones.
El INTA está especializado en la investigación y el desarrollo tecnológico, de carácter dual, en los ámbitos de la Aeronáutica, Espacio, Hidrodinámica, Seguridad y Defensa.
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García Gallegos
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Jaime
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Publicación Acceso Abierto Implementing transfer learning for sound event classification using the realised audio database(Elsevier, 2025-01-04) Mohíno Herranz, Inmaculada; García Gómez, Joaquín; Alonso Díaz, Sagrario; García Gallegos, Jaime; Perez Sanz, Fernando; Aguilar Ortega, Miguel; Gil Pita, Roberto; Agencia Estatal de Investigación (España); Comunidad de MadridCurrently, smart spaces utilize diverse sensors to gather real-time data on activities within environments, enabling systems to activate alarms or execute tasks. These environments support various applications integrating advanced sensory systems like cameras, microphones, and motion sensors. Acoustic sensors are crucial, extracting valuable information from sound waves, including source details and environment characteristics. This article focuses on detecting and classifying common household sounds using the ReaLISED database, comprising 2479 recordings of 18 events. Audio data were collected in real homes with everyday objects and activities, unlike reverberation models. Artificial Intelligence techniques, including Machine Learning classifiers, yielded satisfactory outcomes. Transfer Learning methods were explored, leveraging pre-trained models like YAMNet for sound event recognition by Google, potentially outperforming previous classifiers. Preliminary results reveal a relative reduction of around 25 % in the probability error rate when comparing the obtained results with previous studies, providing valuable insights into potential possibilities and enhancements.Publicación Restringido Final report to the CCT on key comparison CCT-K8 - comparison of local realisations of dew-point temperature of humid gas in the range 30 °C to 95 °C(IOP Science, 2025-02-04) García Gallegos, Jaime; Mitter, Helmut; Abe, Hisashi; Bell, S.; Benyon Puig, Robert; Carroll, P.; Choi, B. I.; Deschermeier, R.; Ebert, V.; Fernicola, Vito; Wang, L.; Meyer, Christopher; Smorgon, Denis; Vicente Mussons, TomásThe report summarises the results of the CCT-K8 key comparison in the field of humidity. The main target of this comparison was to obtain the degree of equivalence (DoE) between realizations of local scales of dew point temperature of humid gas (air), in the range from 30 °C to 95 °C, among the participating national metrology institutes. The report gives details of the scheme, procedure and analysis of the comparison. The overall results display a very good agreement of the nine participating laboratories. The results show excellent agreement between the realized scales with no detected outliers. The performance of the travelling standards was excellent and can be attributed to the intensive preconditioning and selection of the platinum resistance thermometers, prior to their integration into the measuring head assembly, that led to insignificant drift. In the conclusion, some lessons learned are reported that could be beneficial for future key comparisons.Publicación Acceso Abierto Digital transformation: Ensuring metrological traceability(Elsevier, 2024-12-27) Benyon Puig, Robert; García Gallegos, Jaime; Mohíno Herranz, Inmaculada; Perez Sanz, Fernando; Vicente Mussons, TomásThe digital transformation project for the calibration and testing laboratories of INTA is presented. It is intended to serve as the institute's single platform for integrating knowledge, capabilities and innovative metrology techniques, quality and testing systems, to produce highly efficient and reliable results while ensuring metrological traceability of R + D + i results. It provides the necessary data for decision support and aims to address many current issues faced by laboratories and testing centres. The project is developed across the following action areas: (a) Automation of quality assurance for measurements according to ISO/IEC 17043 standard; (b) Automation of data capture and analysis of calibration procedures for the Metrology and Calibration Centre (CMC) and various tests; (c) Digital services for remote auditing of measurement and testing services in accordance with ISO/IEC 17025 and ISO/IEC 17043 standards; (d) Evolution towards the flexibility and expansion of parameterization of the different modules to facilitate implementation in any type of INTA and Ministry of Defence (MoD) laboratories.Publicación Acceso Abierto Digitalization of a calibration laboratory: Batch calibration(Elsevier, 2024-12-22) Perez Sanz, Fernando; Larroca Sanz, Rebeca; Mohíno Herranz, Inmaculada; García Gallegos, Jaime; Vicente Mussons, Tomás; Benyon Puig, RobertThe Metrology and Calibration Centre (CMC) at the National Institute of Aerospace Technology (INTA) has introduced an innovative tool designed to enhance the efficiency and effectiveness of calibration processes within its facilities. This cutting-edge software enables technicians to conduct multiple calibrations simultaneously, provided the requisite experimental setup is in place. Developed with a focus on streamlining the entire calibration workflow, from data acquisition to certificate issuance, the software ensures compliance with the ISO/IEC 17025 standard. Through rigorous testing, the CMC verified the software's performance using devices employed for monitoring ambient conditions (temperature and humidity) across various INTA test laboratories. Notably, these devices underwent batch calibration in groups of six, resulting in a sixfold reduction in experimentation time. Although the associated paperwork was reduced, the necessity to maintain traceability and issue individual calibration certificates for each device offsets the time savings.Publicación Acceso Abierto Digitalization of on-site characterization of climatic chambers(Elsevier, 2024-12-27) García Gallegos, Jaime; Benyon Puig, Robert; Perez Sanz, Fernando; Mohíno Herranz, Inmaculada; Vicente Mussons, TomásThe implementation of a software tool applied to the characterization of climatic chambers is presented and discussed. INTA took part in the design and development of the algorithms for the automatic identification of stabilization periods of physical parameters measured based on defined acceptance criteria and the application of mathematical and statistical analysis for the interpretation of the results obtained. The new operational procedure implemented at INTA is presented as an innovation in the service offered by the laboratory to its clients, allowing them to improve the efficiency of their production processes. It enables the remote calibration of climatic chambers and other thermal facilities of the Institute in different locations in Spain, without the need to move calibration technicians, resulting in increased efficiency in the use of human resources and cost savings.Publicación Restringido Comparison in humidity (dew-point temperature high range) dew point temperature +30 °C to 95 °C(IOP Science, 2024-12-18) Deschermeier, Regina; Bell, Stephanie; Benyon Puig, Robert; Bonde Kentved, Anders; Carroll, Paul; Fernicola, Vito; García Gallegos, Jaime; Heinonen, Martti; Hudolkin, Domen; Jarosz, Rafal; Kokkini, Evmorfia; Mac Lochlainn, Dubhaltach; Mitter, Helmut; Oğuz Aytekin, Seda; Panman, Matthijs; Senn, Remo; Šestan, Danijel; Smorgon, Denis; Stevens, Mark; Zvizdić, DavorThe report summarises the results of the EURAMET.T-K8 key comparison (EURAMET Project No. P 717) in the field of humidity. The comparison covers the dew-point temperature range from +30 °C up to + 95 °C dew point temperature. The report gives details of the scheme, procedure and analysis of the comparison. The overall results display a very good agreement of the 16 participating laboratories. The two dew-point hygrometers used as travelling standard were sufficiently stable. The linkage to the corresponding CCT-K8 comparison will be calculated when the final results for both comparisons are available. Possible procedures are described in the text. In the conclusion, some remarks for improvement for future RMO key comparisons are given.Publicación Restringido An investigation of the comparative performance of diverse humidity sensing techniques in natural gas(Elsevier, 2015-02-21) García Gallegos, Jaime; Benyon Puig, Robert; Ávila, Sara; Benito, Angel M.; Gavioso, Roberto Maria; Mitter, Helmut; Bell, Stephanie; Stevens, Mark; Böse, Norbert; Ebert, Volker; Heinonen, M.; Peruzzi, Andrea; Bosma, Rien; Val´ková, MiroslavaMoisture content is a key factor regardless of the activity carried out inside the natural gas industry (production, processing, transmission, etc.). Not only does the efficiency of the final product, known as heating value, decrease when the water content is high, but it can also trigger potentially dangerous conditions due to the formation of hydrates, that can block pipelines and damage pumping devices and produce other negative effects. For these reasons, accurate measurement and control of humidity is absolutely essential. However, current practice for such moisture measurements is for the devices to be calibrated at atmospheric pressure and in nitrogen or air as the matrix gas, conditions that vary significantly from those present in the actual industrial process. For that, eleven hygrometers based on different measurement principles (chilled-mirror, electrolytic sensor, a spectroscopic analyzer, polymeric and metal oxide humidity sensors) have been compared at facilities of the main carrier of natural gas in Spain, using natural gas at absolute pressures between 0.1 MPa and 6 MPa, and for a range of water content from 13 ppmv to 250 ppmv. Their relative performance is described in terms of the response times, long term stability, hysteresis and behaviour under large pressure changes. Most instruments, exceptions are detailed in the article, show good behaviour regarding response time, hysteresis and under sudden pressure changes. In contrast, drift can be identified in most of the aluminium oxide probes tested.Publicación Restringido Measuring Humidity in Methane and Natural Gas with a Microwave Technique(Springer Nature Link, 2014-04-01) Gavioso, Roberto Maria; Madonna Ripa, D.; Benyon Puig, Robert; García Gallegos, Jaime; Perez Sanz, Fernando; Corbellini, S.; Ávila, Susana; Benito, Angel M.The results of microwave measurements with a quasi-spherical resonator in humid methane samples realized under laboratory conditions at the Istituto Nazionale di Ricerca Metrologica (INRiM) and under industrial conditions in a natural gas sample made available at the facilities of the Technical Manager of the Spanish Gas System and main supplier of natural gas in Spain (ENAGAS) are reported. Measurements at INRiM included vapor phase and condensation tests on methane samples prepared with amount fractions of water between 600 ppm and 5000 ppm at temperatures between 273 K and 295 K and pressures between 150 kPa and 1 MPa. ENAGAS measurements were performed at ambient temperature, 750 kPa on natural gas sampled from the pipeline and successively humidified at amount fractions of water between 140 ppm and 250 ppm for completeness of the comparison with several humidity sensors and instrumentation based on different technologies. To enhance the sensitivity of the microwave method at low humidity, an experimental procedure based on the relative comparison of the dielectric permittivity of the humid gas sample before and after being subject to a chemical drying process was conceived and implemented. The uncertainty budget and the final sensitivity of this procedure are discussed.Publicación Restringido Experimental evaluation of the performance of humidity analyzers in natural gas under industrial conditions(Elsevier, 2016-03-03) García Gallegos, Jaime; Ávila, Susana; Benyon Puig, Robert; McKeogh, G.; Stokes, AndrewThe work reported is the continuation of the extensive comparison performed in controlled laboratory conditions using natural gas from the Spanish grid, as part of the European Metrology Research Project (EMRP) “Characterisation of Energy Gases” (ENG01-Gas, 2009). One of the outcomes of the project was the good performance of a laser absorption spectrometer with respect to other measurement technologies, in particular the absence of appreciable drift effects, exhibited by aluminium oxide (Al2O3) sensors that are traditionally used in the natural gas industry. The investigation was performed over a wide range of humidity content (13 ppmv to 250 ppmv) in ambient conditions of 23 °C ± 3 °C, at Enagás central laboratory in Zaragoza, Spain (Gallegos et al., 2015). We report the subsequent comparison of two laser absorption analyzers, from different manufacturers, and a conventional Al2O3 installed on site in real industrial conditions, at an underground gas storage (UGS) and drying plant of Enagás in Serrablo, Spain. The performance of sensors is reported and discussed for all production stages of the plant (extraction, injection and shutdown), during which extreme ambient temperature values took place (from −15 °C up to 40 °C) and at line pressures up to 6.7 MPa. A purpose built sampling system was designed and constructed to accommodate the different instrumentation requirements and ensure an optimum metrological analysis. The new results are compared with those previously obtained under more ideal laboratory conditions in the context assuring compliance with the contractual specifications that are to be met in Europe (EASEE-gas, 2005).
