MEDICIÓN DE LA FUERZA Y POTENCIA MUSCULAR DEL SALTO VERTICAL CON SENTADILLA HACIENDO USO DEL SOFTWARE ANALIZADOR DE VIDEOS TRACKER

En este trabajo se usó el programa analizador de videos Tracker para estudiar el salto vertical con sentadilla realizada por una persona. El salto fue filmado e importado a Tracker donde se construyó el modelo cinemático de salto. A partir del modelo determinamos la altura máxima que alcanza el centro de gravedad del saltador y los valores promedio de fuerza y potencia muscular desarrollados. La simplicidad del método, su bajo costo y la diversidad de variables físicas involucradas hacen que su aplicación sea apropiada no solo en cursos introductorios de física, sino también en pruebas de salto de diferentes disciplinas deportivas.PALABRAS CLAVE: Salto vertical con sentadilla, fuerza y potencia muscular, Tracker.

On-site forest fire smoke detection by low-power autonomous vision sensor

Trabajo presentado a la VI International Conference on Forest Fire Research celebrada en Coimbra (Portugal) del 15 al 18 de noviembre de 2010.Early detection plays a crucial role to prevent forest fires from spreading. Wireless vision sensor networks deployed throughout high-risk areas can perform fine-grained surveillance and thereby very early detection and precise location of forest fires. One of the fundamental requirements that need to be met at the network nodes is reliable low-power on-site image processing. It greatly simplifies the communication infrastructure of the network as only alarm signals instead of complete images are transmitted, anticipating thus a very competitive cost. As a first approximation to fulfill such a requirement, this paper reports the results achieved from field tests carried out in collaboration with the Andalusian Fire-Fighting Service (INFOCA). Two controlled burns of forest debris were realized (www.youtube.com/user/vmoteProject). Smoke was successfully detected on-site by the EyeRISTM v1.2, a general-purpose autonomous vision system, built by AnaFocus Ltd., in which a vision algorithm was programmed. No false alarm was triggered despite the significant motion other than smoke present in the scene. Finally, as a further step, we describe the preliminary laboratory results obtained from a prototype vision chip which implements, at very low energy cost, some image processing primitives oriented to environmental monitoring.This work is funded by CICE/JA and MICINN (Spain) through projects 2006-TIC-2352 and TEC2009-11812 respectively.Peer Reviewe

Cytological effects of pulsed electromagnetic fields and static magnetic fields induced by a therapeutic device on in vivo exposed rats

Background: There is a trend towards the use of magnetic fields in medicine. Pulsed electromagnetic fields (PEMFs) technology was based upon 20 years of fundamental studies on the electromechanical properties of bone and other connective tissues. More recently, these magnetic fields have been used to treat several health conditions. There remains continuing concern that exposure to electromagnetic devices may cause adverse effects. The aim of the present study was to investigate the cytological effects induced in rats exposed in a patented medical device that uses PEMFs combined with static magnetic fields (SMFs).Material and Methods: Thirty sexually mature 14-week-old male and female Sprague Dawley rats were distributed into three groups: (a) 5 males and 5 females (independently) exposed to PEMFs combined with SMFs, (b) animals treated with SMFs only, and (c) non-exposed animals. Acridine orange fluorescent-staining micronucleus test and male germ cells analysis were performed according to standardized techniques.Results: A lack of evidence for alterations on micronucleus frequency, on polychromatic erythrocytes percentage, and on sperm counts and morphological characteristics of male germ cells were found in mature rats exposed to PEMFs medical device compared to non-exposed animals.Conclusions: This study suggests that the applied magnetic field generated in a therapeutic device did not have any detectable cytotoxic or genotoxic effect in exposed rats. In view of these findings and the contradictory reports in the literature, it is necessary to carry out more research to help clarify the controversy concerning cytogenotoxic risk associated with therapeutic magnetic fields exposures.Keywords: Cytotoxicity, pulsed electromagnetic fields, static magnetic fields, micronuclei, sperm abnormalitie

Going for 2D or 3D? : investigating various machine learning approaches for peach variety identification

Machine learning-based pattern recognition methods are about to revolution-ize the farming sector. For breeding and cultivation purposes, the identifica-tion of plant varieties is a particularly important problem that involves spe-cific challenges for the different crop species. In this contribution, we con-sider the problem of peach variety identification for which alternatives to DNA-based analysis are being sought. While a traditional procedure would suggest using manually designed shape descriptors as the basis for classifica-tion, the technical developments of the last decade have opened up possibili-ties for fully automated approaches, either based on 3D scanning technology or by employing deep learning methods for 2D image classification. In our feasibility study, we investigate the potential of various machine learning ap-proaches with a focus on the comparison of methods based on 2D images and 3D scans. We provide and discuss first results, paving the way for future use of the methods in the field

Tuberculomas múltiples en el sistema nervioso central en un paciente pediátrico: Reporte de caso

Introducción: El hallazgo de tuberculomas múltiples en el sistema nervioso central (SNC) en pacientes pediátricos es infrecuente. Reporte de caso: presentamos el caso de un paciente escolar que ingresó con un tiempo de enfermedad de 6 meses caracterizado por cambio conductual, pérdida de peso, cefalea y hemiparesia izquierda. Los estudios de imágenes mostraron tuberculomas múltiples en el SNC, milia pulmonar y granulomas hepáticos. El estudio de líquido cefalorraquídeo mostró proteinorraquia. Los estudios de BK y la prueba de tuberculina (PPD) fueron negativos.  El test de interferón gamma (IGRA) fue positivo. El paciente recibió tratamiento con esquema I anti TBC con buena respuesta. Las resonancias magnéticas de control mostraron disminución del número y tamaño de las lesiones. Conclusiones: El hallazgo de tuberculomas múltiples a nivel del SNC es infrecuente, con un amplio diagnóstico diferencial y variada presentación clínica. En países endémicos como Perú, se debe considerar en el diagnostico diferencial. Introducción: El hallazgo de tuberculomas múltiples en el sistema nervioso central (SNC) en pacientes pediátricos es infrecuente. Reporte de caso: presentamos el caso de un paciente escolar que ingresó con un tiempo de enfermedad de 6 meses caracterizado por cambio conductual, pérdida de peso, cefalea y hemiparesia izquierda. Los estudios de imágenes mostraron tuberculomas múltiples en el SNC, milia pulmonar y granulomas hepáticos. El estudio de líquido cefalorraquídeo mostró proteinorraquia. Los estudios de BK y la prueba de tuberculina (PPD) fueron negativos.  El test de interferón gamma (IGRA) fue positivo. El paciente recibió tratamiento con esquema I anti TBC con buena respuesta. Las resonancias magnéticas de control mostraron disminución del número y tamaño de las lesiones. Conclusiones: El hallazgo de tuberculomas múltiples a nivel del SNC es infrecuente, con un amplio diagnóstico diferencial y variada presentación clínica. En países endémicos como Perú, se debe considerar en el diagnostico diferencial.

Effectiveness and safety of the bevacizumab and erlotinib combination versus erlotinib alone in EGFR mutant metastatic non-small-cell lung cancer: systematic review and meta-analysis

BackgroundThe EGFR gene encodes a protein that stimulates molecular pathways that allow the growth and development of the tumor microenvironment. The current preferred tyrosine kinase inhibitor (TKI) for the first-line treatment of EGFRm metastatic non-small cell lung cancer (NSCLC) is osimertinib. However, the combination of angiogenesis inhibitors and TKI has produced discordant results. We aimed to assess the effects of the bevacizumab and erlotinib combination in EGFRm metastatic NSCLC.MethodsUsing eligibility criteria focused on patients with EGFRm metastatic NSCLC treated with bevacizumab and erlotinib, we searched databases including clinical trial randomized studies and reviews published until April 15, 2023 in Medline (PubMed), Scopus, and Embase. Eight clinical trials (1,052 patients) were selected from 1,343 articles for quantitative and qualitative assessment. The risk of bias was assessed using the Cochrane Risk of Bias tool. Data were synthesized through random-effects meta-analysis.ResultsThe bevacizumab and erlotinib combination significantly improved the progression-free survival (PFS) (log(HR) = 0.63; 95% CI: 0.54–0.73, p < 0.001) and overall response ratio (ORR) (RR = 0.79; 95% CI, 0.64–0.97, p = 0.03). However, it did not improve the overall survival (log(HR) = 0.93; 95% CI, 0.78–1.10, p = 0.38) and was associated with higher serious adverse events (SAEs) (OR = 3.48; 95% CI, 1.76–6.88, p = 0.005). A subgroup analysis suggested similar benefits in different mutation subtypes and brain metastasis condition. The evidence is limited by a moderate risk of bias across studies and heterogeneity in the reporting of SAEs.ConclusionsThe bevacizumab and erlotinib combination significantly improved PFS and ORR in EGFRm metastatic NSCLC but were also associated with higher-grade (≥3) adverse events. These results suggest that while the combination therapy may enhance progression-free survival and overall response, it does not improve the overall survival and is associated with higher toxicity. Thus, the treatment should be personalized based on individual patient comorbidities. Further prospective trials are needed to validate these results.Systematic review registrationhttps://www.crd.york.ac.uk/prospero/#searchadvanced, identifier CDR 42022364692

Nurses' perceptions of aids and obstacles to the provision of optimal end of life care in ICU

Contains fulltext : 172380.pdf (publisher's version ) (Open Access

Plan de negocio para la creación de roca tecnologies s.a. microempresa que comercializara servicios de auditoría de sistemas y la implementación de un sistema detector de intrusos

The project includes the presentation of a business plan to market a product and various services in the area of Systems Auditing. We present a prototype design and construction has the function to control the proper use and proper operation of voice and data network of a microenterprise. The system enables timely detection of failure in communication equipment, key network equipment such as servers and services on a team defined. The business plan concludes that it is feasible to our enterprise

Laterally stretched flap with connective tissue graft: a novel approach to treat deep/narrow gingival recessions in lower incisors

EuroPerio 9 Congress. European Federation of Periodontology. Amsterdam, Holland Poster Presentation PD171 Background: Different alternatives of treatment of deep/narrow gingival recessions with connective tissue grafts have been proposed: Tunneling procedures1 leave a considerable area of the graft exposed conditioning its nutrition.2,3 Coronally advancing the flap to cover the graft requires extensive repositioning of a -mostly mucosal- flap and the mucogingival junction; while lateral displacement4 is generally achieved by placing vertical incisions, potentially leaving visible scars. The aim of this case series is to present the technical description, and the results obtained with 21 gingival recessions treated with a recently published novel approach: the laterally stretched flap (LSF) with connective tissue graft (CTG).5 Technical variants, and keys to success will be reviewed. Clinical Procedure: 17 patients with 21 deep/narrow Miller class II and III gingival recessions were treated and followed-up between 6 months and 4 years. Recession depth (Rec) and keratinized tissue (KT) were registered at baseline and at final evaluation (Table 1). Mean % root coverage (MRC) and complete root coverage (CRC) were calculated. Briefly, the recipient site was prepared with intracrevicular incisions and a partial thickness envelope performed with tunneling instruments until ample tissue elasticity was obtained.5 A connective tissue graft was harvested from the palate with a modified single incision technique utilizing a parallel blade scalpel.6 The graft was inserted into the envelope and held with sutures at both lateral ends.7,8 The lateral edges of the recession were finally approximated with sutures to cover the graft. Outcomes: Clinical Outcomes: Class I and II recessions gained 99.2% of MRC and 88.5% of sites achieved CRC. Miller class III showed 79.2% of MRC and 23.1% of the sites reached CRC. KT was increased in all cases (Table 1). Conclusions: Laterally stretching the flap to cover the graft improved revascularization of the graft and wound stability rendering excellent esthetic outcomes with minimal patient discomfort

New experimental apparatus for the study of the Bénard-Rayleigh problem

A new experimental system to measure the equivalent thermal conductivity of a liquid with regard to the Bénard-Rayleigh problem was constructed. The liquid is enclosed within walls of polymethylmethacrylate between two copper plates in which there are thermocouples to measure the difference in temperature between the lower and upper surfaces of the layer of liquid. Heat flux is measured by means of a linear heat fluxmeter consisting of 204 thermocouples in series. The fluxmeter was calibrated and the linear relationship that exists between the heat flux and the emf generated was verified. The thermal conductivity of the polymethylmethacrylate employed was measured and measurements of the equivalent conductivity in cylindrical boundaries of two silicone oils were made. The critical value of the temperature difference and the contribution of the convective process to the transmission of heat were determined