3,248 research outputs found

    Performance measurement in Judo: main KPIs, cluster categorization and causal relationships

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    [EN] Performance measurement in Judo usually focuses on some KPIs whose values indicate the final performance of the athlete. This paper deals with firstly identifying which these main Key Performance Indicators (KPIs) in Judo are. Once this is done, the KPIs are classified into four different clusters: Physical training, Specific training, Psychology and Lifestyle. Then, it moves into analyzing possible quantitative techniques to identify cause-effect relationships between KPIs in order to link not only the impact of the Judo KPIs with the achievement of the judoka’s strategic objectives but also to identify both the relative and the global importance of each of these KPIs. Finally, it points out the Analytic Network Technique as the one that could be ideally applied in this context and offers future research actions.Uriarte Marcos, S.; Rodriguez-Rodriguez, R.; Uriarte Marcos, M.; Alfaro-Saiz, J. (2019). Performance measurement in Judo: main KPIs, cluster categorization and causal relationships. International Journal of Production Management and Engineering. 7(2):145-150. https://doi.org/10.4995/ijpme.2019.12035SWORD1451507

    p27Kip1 V109G as a biomarker for CDK4/6 inhibitors indication in hormone receptor–positive breast cancer

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    Biomarker; Hormone receptor-positive; Breast cancerBiomarcador; Cáncer de mama; Receptor hormonal positivoBiomarcador; Càncer de mama; Receptor hormonal positiuCDK4/6 inhibitors benefit a minority of patients who receive them in the breast cancer adjuvant setting. p27Kip1 is a protein that inhibits CDK/Cyclin complexes. We hypothesized that single-nucleotide polymorphisms that impaired p27Kip1 function could render patients refractory to endocrine therapy but responsive to CDK4/6 inhibitors, narrowing the patient subpopulation that requires CDK4/6 inhibitors. We found that the p27Kip1 V109G single-nucleotide polymorphism is homozygous in approximately 15% of hormone-positive breast cancer patients. Polymorphic patients experience rapid failure in response to endocrine monotherapy compared with wild-type or heterozygous patients in the first-line metastatic setting (progression-free survival: 92 vs 485 days, P < .001); when CDK4/6 inhibitors are added, the differences disappear (progression-free survival: 658 vs 761 days, P = .92). As opposed to wild-type p27Kip1, p27Kip1 V109G is unable to suppress the kinase activity of CDK4 in the presence of endocrine inhibitors; however, palbociclib blocks CDK4 kinase activity regardless of the p27Kip1 status. p27Kip1 genotyping could constitute a tool for treatment selection.MM is supported by the Spanish Ministry of Science and Innovation (RTI2018-095582-B-100; PLEC2021-007892 and RED2018-102723-T), AES (DTS21/00132) and Comunidad de Madrid (B2017/BMD-3884 and Y2020/BIO-6519). MQF is a recipient of the following grants: AES—PI 19/00454 funded by the ISCIII and co-funded by the European Regional Development Fund (ERDF), and B2017/BMD3733 (Immunothercan-CM) – Call for Coordinated Research Groups from the Madrid Region—Madrid Regional Government—ERDF funds. This study was also funded by a donation from CRIS Contra El Cancer Foundation

    Above-ground biomass estimation of arable crops using UAV-based SfM photogrammetry

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    This is an Accepted Manuscript of an article published by Taylor & Francis in Geocarto International on 3 dec 2018, available online: http://www.tandfonline.com/10.1080/10106049.2018.1552322Methods of estimating the total amount of above-ground biomass (AGB) in crop fields are generally based on labourious, random, and destructive in situ sampling. This study proposes a methodology for estimating herbaceous crop biomass using conventional optical cameras and structure from motion (SfM) photogrammetry. The proposed method is based on the determination of volumes according to the difference between a digital terrain model (DTM) and digital surface model (DSM) of vegetative cover. A density factor was calibrated based on a subset of destructive random samples to relate the volume and biomass and efficiently quantify the total AGB. In all cases, RMSE Z values less than 0.23 m were obtained for the DTMDSM coupling. Biomass field data confirmed the goodness of fit of the yieldbiomass estimation (R2=0,88 and 1,12 kg/ha) mainly in plots with uniform vegetation coverage. Furthermore, the method was demonstrated to be scalable to multiple platform types and sensorsThis work was supported by the life project “Operation CO2: Integrated Agroforestry Practices and Nature Conservation Against Climate Change - LIFE+ 11 ENV/ES/535” and by Xunta de Galicia under the grant “Financial aid for the consolidation and structure of competitive units of investigation in the universities of the University Galician System (2016-18)” Ref. ED431B 2016/030 and Ref. ED341D R2016/023.S

    Plant survival monitoring with UAVs and multispectral data in difficult access afforested areas

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    This is an Accepted Manuscript of an article published by Taylor & Francis in Geocarto International on 02 Oct 2018, available online: http://www.tandfonline.com/10.1080/10106049.2018.1508312Water supply devices enable afforestation in dry climates and on poor lands with generally high success rates. Previous survival analyses have been based on the direct observation of each individual plant in the field, which entails considerable effort and costs. This study provides a low-cost method to discriminate between live and dead plants in afforestations that can efficiently replace traditional field inspections through the use of UAVs equipped with RGB and NIR sensors. The method combines the use of a conventional camera with an identical camera modified to record the NIR channel. Survival analysis was performed with digital image processing techniques based on calculated indices associated with plant vigour and PCA-based decorrelation. The method yielded results with high global accuracy rates (~96.2%) with a minimum percentage of doubtful plants, even in young plantations (seedlings < 30 cm tall). The procedure could be particularly useful in hazardous areasThis work was supported by the Xunta de Galicia under the Grant “Financial aid for the consolidation and structure of competitive units of investigation in the universities of the University Galician System (2016-18)” [ED431B 2016/030, ED341D R2016/023] and the European Program Life+ [LIFE/ENV/ES/000447] “The Green Deserts: New planting techniques for tree cultivation in desertified environments to face Climate Change”.S

    Related Factors of Anemia in Critically Ill Patients: A Prospective Multicenter Study

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    Anemia; Blood; Practice managementAnemia; Sangre; Gestión prácticaAnèmia; Sang; Gestió pràcticaAnemia is common in critically ill patients; almost 95% of patients admitted to intensive care units (ICUs) have hemoglobin levels below normal. Several causes may explain this phenomenon as well as the tendency to transfuse patients without adequate cause: due to a lack of adherence to protocols, lack of supervision, incomplete transfusion request forms, or a lack of knowledge about the indications, risks, and costs of transfusions. Daily sampling to monitor the coagulation parameters and the acid–base balance can aggravate anemia as the main iatrogenic factor in its production. We studied the association and importance of iatrogenic blood loss and other factors in the incidence of anemia in ICUs. We performed a prospective, observational, multicenter study in five Spanish hospitals. A total of 142 patients with a median age of 58 years (IQI: 48–69), 71.83% male and 28.17% female, were admitted to ICUs without a diagnosis of iatrogenic anemia. During their ICU stay, anemia appeared in 66.90% of the sample, 95 patients, (95% CI: 58.51–74.56%). Risk factors associated with the occurrence of iatrogenic anemia were arterial catheter insertion (72.63% vs. 46.81%, p-value = 0.003), venous catheter insertion (87.37% vs. 72.34%, p-value = 0.023), drainages (33.68% vs. 12. 77%, p-value = 0.038), and ICU stay, where the longer the stay, the higher the rate of iatrogenic anemia (p-value < 0.001). We concluded that there was a statistical significance in the production of iatrogenic anemia due to the daily sampling for laboratory monitoring and critical procedures in intensive care units. The implementation of patient blood management programs could address these issues

    HPV-16 infection modifies overall survival of Puerto Rican HNSCC patients

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    International audienceThis paper presents a set of experimental results concerning the sliding mode control of an electro-pneumatic system. Two discrete-time control strategies are considered for the implementation of the discontinuous part of the sliding mode controller: explicit and implicit discretizations. While the explicit implementation is known to generate numerical chattering [6], [7], [12], [13], the implicit one is expected to significantly reduce chattering while keeping the accuracy. The experimental results reported in this work remarkably confirm that the implicit discrete-time sliding mode supersedes the explicit ones, with several important features: chattering in the control input is almost eliminated (while the explicit and saturated controllers behave like high-frequency bang-bang inputs), the input magnitude depends only on the perturbation size and is largely independent of the controller gain and sampling time

    Analysis and optimization of grape seed oil epoxidation in supercritical CO2

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    In this work, it is proposed to check the viability of the epoxidation process of grape seed oil under supercritical conditions, select and optimize the ratios of the different reagents and/or additives that take part in it. Different experiments were performed involving oil, hydrogen peroxide, CO2 (as the supercritical fluid), sodium bicarbonate and different phase transfer catalysts (PTC) as enhancers for the performance. Operating conditions were set in 150 bar, 40 °C and 15 h. Subsequently, a statistical study of the influence of each of the reagents on the yield was carried out. Finally, it was possible to reach 8.31 % yield by means of the selection of an optimal PTC. This is the first approach reported to the epoxidation of vegetable oils through the utilization of scCO2 not only as a solvent but also as a reactant, using several PTCs and analyzing its effect and that of epoxy agents and enhancers.En este trabajo se propone comprobar la viabilidad del proceso de epoxidación del aceite de pepita de uva en condiciones supercríticas, seleccionar y optimizar las proporciones de los diferentes reactivos y/o aditivos que intervienen en el mismo. Se realizaron diferentes experimentos con aceite, peróxido de hidrógeno, CO 2 (como fluido supercrítico), bicarbonato de sodio y diferentes catalizadores de transferencia de fase (PTC) como potenciadores del rendimiento. Las condiciones de operación se establecieron en 150 bar, 40 °C y 15 h. Posteriormente se realizó un estudio estadístico de la influencia de cada uno de los reactivos en el rendimiento. Finalmente, se logró alcanzar un rendimiento de 8.31 % mediante la selección de un PTC óptimo. Este es el primer enfoque reportado para la epoxidación de aceites vegetales a través de la utilización de scCO 2no solo como disolvente sino también como reactivo, utilizando varios PTC y analizando su efecto y el de los agentes epoxi y potenciadores

    Kinetics of Grape Seed Oil Epoxidation in Supercritical CO2

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    The epoxidation of grape seed oil in supercritical CO2, to the best of our knowledge, has been only superficially described in the literature, apart from a short communication and our own previous published work on the topic. In this work, a thorough study of the performance of the supercritical epoxidation of grape seed oil is performed in a wide range of conditions, and the kinetic parameters of the supercritical epoxidation of vegetable oils are reported for the first time in the literature. The experimental work has covered a 40–60 °C temperature range at 150 bar, sampling during a period of 48 h. The nature and extent of the side reactions and secondary products obtained have been evaluated, being hydrolysis products and their oligomerization derivatives the major by-products. Reaction rate constants (10−2 h−1 order) and activation energy parameters were finally calculated from the experimental conversion and epoxy yield data to establish the effect of temperature on the kinetics of the process.La epoxidación del aceite de semilla de uva en CO2 supercrítico , hasta donde sabemos, solo se ha descrito superficialmente en la literatura, aparte de una breve comunicación y nuestro propio trabajo publicado previamente sobre el tema. En este trabajo, se realiza un estudio exhaustivo del rendimiento de la epoxidación supercrítica del aceite de semilla de uva en una amplia gama de condiciones, y se informa por primera vez en la literatura sobre los parámetros cinéticos de la epoxidación supercrítica de los aceites vegetales. El trabajo experimental ha cubierto un rango de temperatura de 40-60 °C a 150 bar, muestreando durante un periodo de 48 h. Se ha evaluado la naturaleza y extensión de las reacciones secundarias y los productos secundarios obtenidos, siendo los productos de hidrólisis y sus derivados de oligomerización los principales subproductos. Constantes de velocidad de reacción (10−2 h −1 orden) y los parámetros de energía de activación finalmente se calcularon a partir de la conversión experimental y los datos de rendimiento de epoxi para establecer el efecto de la temperatura en la cinética del proceso

    Tuberculine reaction measured by infrared thermography

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    Setting: The infection with Mycobacterium tuberculosis gives a delayed immune response, measured by the tuberculine skin test. We present a new technique for evaluation based on automatic detection and measurement of skin temperature due to infrared emission.; Design: 34 subjects (46.8+/-16.9 years) (12/22, M/F) with suspected tuberculosis disease were examined with an IR thermal camera, 48h after tuberculin skin injection.; Results: In 20 subjects, IR analysis was positive for tuberculine test. Mean temperature of injection area was higher, around 1 degrees C, for the positive group (36.2+/-1.1 degrees C positive group; 35.1+/-1.6 degrees C negative group, p < 0.02 T test for unpaired groups).; Conclusion: IR image analysis achieves similar estimation of tuberculin reaction as the visual evaluation, based on higher temperature due to increased heat radiation from the skin lesion.Peer ReviewedPostprint (author's final draft
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