Smartphone Photogrammetric Assessment for Head Measurements

[EN] The assessment of cranial deformation is relevant in the field of medicine dealing with infants, especially in paediatric neurosurgery and paediatrics. To address this demand, the smartphone-based solution PhotoMeDAS has been developed, harnessing mobile devices to create three-dimensional (3D) models of infants¿ heads and, from them, automatic cranial deformation reports. Therefore, it is crucial to examine the accuracy achievable with different mobile devices under similar conditions so prospective users can consider this aspect when using the smartphone-based solution. This study compares the linear accuracy obtained from three smartphone models (Samsung Galaxy S22 Ultra, S22, and S22+). Twelve measurements are taken with each mobile device using a coded cap on a head mannequin. For processing, three different bundle adjustment implementations are tested with and without self-calibration. After photogrammetric processing, the 3D coordinates are obtained. A comparison is made among spatially distributed distances across the head with PhotoMeDAS vs. ground truth established with a Creaform ACADEMIA 50 while-light 3D scanner. With a homogeneous scale factor for all the smartphones, the results showed that the average accuracy for the S22 smartphone is ¿1.15 0.53 mm, for the S22+, 0.95 0.40 mm, and for the S22 Ultra, ¿1.8 0.45 mm. Worth noticing is that a substantial improvement is achieved regardless of whether the scale factor is introduced per device.Instituto de Salud Carlos III under project number PI22/01416 and joint financing by the European Union. This work was supported by the Spanish Instituto de Salud Carlos III under project number PI22/01416 and joint financing by the European Union.Quispe-Enriquez, OC.; Valero-Lanzuela, JJ.; Lerma, JL. (2023). Smartphone Photogrammetric Assessment for Head Measurements. Sensors. 23(21). https://doi.org/10.3390/s23219008232

Craniofacial 3D Morphometric Analysis with Smartphone-Based Photogrammetry

[EN] Obtaining 3D craniofacial morphometric data is essential in a variety of medical and educational disciplines. In this study, we explore smartphone-based photogrammetry with photos and video recordings as an effective tool to create accurate and accessible metrics from head 3D models. The research involves the acquisition of craniofacial 3D models on both volunteers and head mannequins using a Samsung Galaxy S22 smartphone . For the photogrammetric processing, Agisoft Metashape v 1.7 and PhotoMeDAS software v 1.7 were used. The Academia 50 white-light scanner was used as reference data (ground truth). A comparison of the obtained 3D meshes was conducted, yielding the following results: 0.22 ± 1.29 mm for photogrammetry with camera photos, 0.47 ± 1.43 mm for videogrammetry with video frames, and 0.39 ± 1.02 mm for PhotoMeDAS. Similarly, anatomical points were measured and linear measurements extracted, yielding the following results: 0.75 mm for photogrammetry, 1 mm for videogrammetry, and 1.25 mm for PhotoMeDAS, despite large differences found in data acquisition and processing time among the four approaches. This study suggests the possibility of integrating photogrammetry either with photos or with video frames and the use of PhotoMeDAS to obtain overall craniofacial 3D models with significant applications in the medical fields of neurosurgery and maxillofacial surgery.Instituto de Salud Carlos III under project number PI22/01416 and joint financing by the European UnionQuispe-Enriquez, OC.; Valero-Lanzuela, JJ.; Lerma, JL. (2024). Craniofacial 3D Morphometric Analysis with Smartphone-Based Photogrammetry. Sensors. 24(1). https://doi.org/10.3390/s2401023024

Isolation of Aspergillus spp. from the respiratory tract in critically ill patients: risk factors, clinical presentation and outcome

INTRODUCTION: Our aims were to assess risk factors, clinical features, management and outcomes in critically ill patients in whom Aspergillus spp. were isolated from respiratory secretions, using a database from a study designed to assess fungal infections. METHODS: A multicentre prospective study was conducted over a 9-month period in 73 intensive care units (ICUs) and included patients with an ICU stay longer than 7 days. Tracheal aspirate and urine samples, and oropharyngeal and gastric swabs were collected and cultured each week. On admission to the ICU and at the initiation of antifungal therapy, the severity of illness was evaluated using the Acute Physiology and Chronic Health Evaluation II score. Retrospectively, isolation of Aspergillus spp. was considered to reflect colonization if the patient did not fulfil criteria for pneumonia, and infection if the patient met criteria for pulmonary infection and if the clinician in charge considered the isolation to be clinically valuable. Risk factors, antifungal use and duration of therapy were noted. RESULTS: Out of a total of 1756 patients, Aspergillus spp. were recovered in 36. Treatment with steroids (odds ratio = 4.5) and chronic obstructive pulmonary disease (odds ratio = 2.9) were significantly associated with Aspergillus spp. isolation in multivariate analysis. In 14 patients isolation of Aspergillus spp. was interpreted as colonization, in 20 it was interpreted as invasive aspergillosis, and two cases were not classified. The mortality rates were 50% in the colonization group and 80% in the invasive infection group. Autopsy was performed in five patients with clinically suspected infection and confirmed the diagnosis in all of these cases. CONCLUSION: In critically ill patients, treatment should be considered if features of pulmonary infection are present and Aspergillus spp. are isolated from respiratory secretions

APPLICATION OF DIVERSE ARCHITECTURAL HERITAGE DOCUMENTATION TECHNIQUES ON THE 'MAS DEL NOI' FARMHOUSE

[EN] For the study, documentation and conservation of architectural heritage, it is required to use all the available techniques, classic and new, that may contribute to provide a correct idea about the present condition of the construction, and tackle the possible actions for its appropriate maintenance. This paper describes the usage of a terrestrial laser scanner for the recording and documentation of the ‘Mas del Noi’ at the Campus of Vera, Universitat Politècnica de València. First, classical techniques are used for the graphical recording, sketches and topographic radiation. Afterwards, it is shown the indirect process implemented for the massive 3D data acquisition from laser scanning and photogrammetry, modelling of the point cloud and 3D printing to materialize the final results. The detection of alterations by multispectral and thermal imagery is also included.[ES] En el proceso de estudio, documentación y conservación del patrimonio arquitectónico se hace necesaria la utilización de todas las técnicas disponibles, tanto clásicas como modernas, que puedan aportar una idea acertada del estado actual en que se encuentra la construcción, y abordar las posibles actuaciones para su adecuado mantenimiento. En este artículo se presentan los trabajos realizados mediante el uso de un escáner láser 3D para el registro y la documentación del ‘Mas del Noi’ en el campus de Vera de la Universitat Politècnica de València. Se aborda la realización de un registro gráfico mediante técnicas clásicas, dibujo a mano alzada y radiación topográfica. Posteriormente se muestra el proceso indirecto implantado a partir de la toma masiva de datos 3D mediante láser escáner y fotogrametría, el modelado de la nube de puntos y la materialización del resultado final en una impresión 3D. También se incluye la detección de patologías mediante imágenes multiespectrales y térmicas.Carbonell Rivera, JP.; Montalvá España, D.; Lerma García, JL. (2016). APLICACIÓN DE DIVERSAS TÉCNICAS DE DOCUMENTACIÓN PATRIMONIAL ARQUITECTÓNICA EN LA ALQUERÍA 'MAS DEL NOI'. En 8th International congress on archaeology, computer graphics, cultural heritage and innovation. Editorial Universitat Politècnica de València. 511-515. https://doi.org/10.4995/arqueologica8.2016.4197OCS51151

Short-term effects of hyaluronic acid on the subgingival microbiome in peri-implantitis: A randomized controlled clinical trial

This study was supported by Ricerfarma srl (Milan, Italy) in collaboration with Research Groups #CTS 583 and #BIO-344 (Junta de Andalucía, Spain) (reference: OTRI-3300). Ana Soriano-Lerma was supported by a fellowship from the Ministry of Education, Culture and Sport (FPU 17/05413). José A. García-Salcedo was supported by “Programa Estatal de Inves-tigación, Desarrollo e Innovación Orientada a los Retos de la Sociedad” (grant SAF-SAF2015-71714-RMINECO/FEDER) and The Network of Tropical Diseases Research—RICET (Instituto de Salud Carlos III).Background: The aim of our study was to evaluate the effects of a hyaluronic acid gel at 45 days on the microbiome of implants with peri-implantitis with at least one year of loading. Methods: A randomized controlled trial was conducted in peri-implantitis patients. Swabs containing the samples were collected both at baseline and after 45 days of treatment. 16S rRNA sequencing techniques were used to investigate the effect of hyaluronic acid gel on the subgingival microbiome. Results: 108 samples of 54 patients were analyzed at baseline and after follow-up at 45 days. Three strata with different microbial composition were obtained in the samples at baseline, representing three main microbial consortia associated with peri-implantitis. Stratum 1 did not show any difference for any variable after treatment with hyaluronic acid, whereas in stratum 2, Streptococcus, Veillonella, Rothia and Granulicatella did decrease (p<0.05). Similarly, Prevotella and Campylobacter (p< 0.05) decreased in stratum 3 after treatment with hyaluronic acid. Microbial diversity was found to be decreased in stratum 3 (p<0.05) after treatment with hyaluronic acid compared to the control group, in which an increase was found (p<0.05). Conclusions: Hyaluronic acid reduced the relative abundance of peri-implantitis-related microorganisms, especially the early colonizing bacteria, suggesting a specific action during the first stages in the development of the disease. Hyaluronic acid did not alter relative abundances of non-oral genera. The use of hyaluronic acid in advanced stages of peri-implantitis resulted in a decrease in microbial alpha diversity, suggesting a protective action of the peri-implant site against bacteria colonization.Ricerfarma srl (Milan, Italy)Junta de Andalucía, Spain Research Groups OTRI-3300: #CTS 583, #BIO-344Ministry of Education, Culture and Sport (FPU 17/05413)SAF-SAF2015-71714-RMINECO/FEDERInstituto de Salud Carlos II

Damage reduction of the laser drilling process on back contact solar cells by chemical treatment

Production of back contact solar cells requires holes generations on the wafers to keep both positive and negative contacts on the back side of the cell. This drilling process weakens the wafer mechanically due to the presence of the holes and the damage introduced during the process as microcracks. In this study, several chemical processes have been applied to drilled wafers in order to eliminate or reduce the damage generated during this fabrication step. The treatments analyzed are the followings: alkaline etching during 1, 3 and 5 minutes, acid etching for 2 and 4 minutes and texturisation. To determine mechanical strength of the samples a common mechanical study has been carried out testing the samples by the Ring on Ring bending test and obtaining the stress state in the moment of failure by FE simulation. Finally the results obtained for each treatment were fitted to a three parameter Weibull distributio

Evaluation of the Degree of Interdisciplinary Knowledge and Interest in Participating in Multidisciplinary Groups of the Degree in Industrial Engineering and Chemical Engineering Project Students and the Advanced GIS Students of the Degree in Geomatics Engineering and Surveying

[EN] The current socio-economic and professional context poses the challenge of training students in skills that will help them work cooperatively in multidisciplinary teams in the future. The chances of finding solutions to problems increase when team members know the potential that each can contribute. In this work, the student¿s perception of interdisciplinarity and their degree of interest has been evaluated to know the basis on which to apply teaching innovations that improve this perception between the degrees of Industrial Engineering and Chemical Engineering and the degree in Geomatic Engineering and Topography from the UPV. After designing and conducting a survey of students, it is concluded that there is a lack of knowledge about the possibilities and potential of interdisciplinary collaboration. However, students are interested in working in multidisciplinary teams, so they should try to incorporate this multidisciplinary. in teaching for the benefit of future graduates.This innovation has been realized thanks to PIME/22-23/354, ACDC-IT project n.1882.Lerma Arce, V.; Coll-Aliaga, E.; Pastor-Ferrando, J.; Fuentes Bargues, JL.; Lo-Iacono-Ferreira, VG.; Lorenzo-Sáez, E. (2023). Evaluation of the Degree of Interdisciplinary Knowledge and Interest in Participating in Multidisciplinary Groups of the Degree in Industrial Engineering and Chemical Engineering Project Students and the Advanced GIS Students of the Degree in Geomatics Engineering and Surveying. Iris Journal of Educational Research. 2(1):1-7. https://doi.org/10.33552/IJER.2023.02.000530172