Presencia de gastrolitos y cáscaras de huevo en egagrópilas de Lechuza común (Tyto alba)

L'anàlisi de 787 egagròpiles d'òliba van mostrar la presència de 0,5% de gastrolites i 0,12% de restes d'ous de la mateixa espècie. Aquests dos elements rarament s'han esmentat a la bibliografia. La seva baixa freqüència suggereix l'ingesta accidental

A ResNet is All You Need? Modeling A Strong Baseline for Detecting Referable Diabetic Retinopathy in Fundus Images

Deep learning is currently the state-of-the-art for automated detection of referable diabetic retinopathy (DR) from color fundus photographs (CFP). While the general interest is put on improving results through methodological innovations, it is not clear how good these approaches perform compared to standard deep classification models trained with the appropriate settings. In this paper we propose to model a strong baseline for this task based on a simple and standard ResNet-18 architecture. To this end, we built on top of prior art by training the model with a standard preprocessing strategy but using images from several public sources and an empirically calibrated data augmentation setting. To evaluate its performance, we covered multiple clinically relevant perspectives, including image and patient level DR screening, discriminating responses by input quality and DR grade, assessing model uncertainties and analyzing its results in a qualitative manner. With no other methodological innovation than a carefully designed training, our ResNet model achieved an AUC = 0.955 (0.953 - 0.956) on a combined test set of 61007 test images from different public datasets, which is in line or even better than what other more complex deep learning models reported in the literature. Similar AUC values were obtained in 480 images from two separate in-house databases specially prepared for this study, which emphasize its generalization ability. This confirms that standard networks can still be strong baselines for this task if properly trained.Comment: Accepted for publication at the 18th International Symposium on Medical Information Processing and Analysis (SIPAIM 2022

Panegirico de San Andres, el apóstol digno, amado del Señor [Texto impreso] : dicho en su dia, i en su real, i parroquial Iglesia de Valencia, año 1771

Sign. : []3, A-B4, C3Port. con grab. xil.Letras iniciales decoradas y friso tip.Notas a pie de pág. en latín y reclamo

Microbiological control in beverage industry

Motivation: The purpose of this study is to establish a microbiological and physic-chemical control of juice-based beverages. All these analyses are included in the International Standard Organization (ISO) regulations. The goal of food companies is to offer a high quality product for human health, so a series of microbiological tests are required to ensure the safety of the product at different levels.Methods: The method used for the microbiological test was the plate count for bacteria, molds and yeasts colonies. Samples were collected at different locations in the factory: water tanks, ingredient tanks, facilities and final product, as established in Article 3 of Real Decreto 650/2011. Samples of clear products, such as water, were analyzed by filtration with 0.45 μm membranes. They were then transferred to culture plates with selective media for selective counting. Samples of pulp products were analyzed by spreading it in acidified media, recreating the conditions of the final product, so facilitating the growth of microorganisms present in fruit juices. In addition, chemical parameters, such as acidity and Brix degree were measured as indicated in Article 1 of Real Decreto 1518/2007, by acid-base titration and spectrophotometry respectively.Results: Results obtained were categorized as presence or absence of microorganisms in culture media. Among the ingredient samples, a high growth for molds and yeasts was observed in compare to bacteria; however it was still within the established limits. In water samples, coliform bacteria were not present in any case. After UV treatment absence of microbial growth in water was observed. In the finished product no microorganisms were observed after pasteurization. The physicochemical parameters were within the standards of the regulation.Conclusions: According to the established parameters all the counts were within the limits and therefore the safety of the product and the high level of food quality can be ensured. In addition, the effectiveness of the treatment of water purification and cleaning of the facilities was confirmed, and aseptic environment of the product bottling is achieved

Grafted Sepiolites for the Removal of Pharmaceuticals in Water Treatment

The increased detection of pharmaceuticals in finished drinking water has become a growing cause of concern in recent years. The removal of atenolol, ranitidine, and carbamazepine by sepiolite, following functionalization of its surface by organosilane grafting, constituted the subject of this investigation. Silylated surfaces include octyl, γ-aminopropyl, 3-chloropropyl, and triphenyl moieties. The sorption of atenolol and ranitidine was higher on sepiolite functionalized with 3-chloropropyl, while carbamazepine showed a higher sorption on sepiolite with triphenyl groups. Filtration experiments of both ranitidine and carbamazepine on octyl- and triphenyl-sepiolite, respectively, showed a higher retention of ranitidine in comparison to carbamazepine, in spite of the fact that the number of sorption sites was lower due to its higher binding rate.Ministerio de Educación y Cultura CTM2013-42306-R, CTM2016-77168-

Graphic study and geovisualization of the old windmills of La Mancha (Spain)

In Spain, one can find geographical diversity and unique sites of great significance and cultural heritage. Many of the nation’s treasured places, however, have deteriorated or have even disappeared. What is left, then, should be studied and documented both graphically and infographically. It is important to preserve and document Spain’s unique locations, especially those related to vernacular heritage, to transhumance and visual impact assessment in many national infrastructures projects. Windmills are important examples of agro-industrial heritage and are sometimes found in the beds of streams and rivers but can also be found high in the hills. Their presence is constant throughout the Iberian Peninsula. These mills are no longer in use due to technological advances and the emergence of new grinding systems. The aim of this study was to present a specific methodology for the documentation of windmills, to create a graphical representation using computer graphics, as well as to disseminate knowledge of this agro-industrial heritage. This research has integrated graphic materials, including freehand sketches, photographs, digital orthophotos, computer graphics and multimedia in the creation of a specific methodology based on cutting-edge technology such as a digital photogrammetric workstation (DPW), global navigation satellite systems (GNSS), computer-aided design (CAD) and computer animation

Elementos matemáticos en la construcción de árboles filogenéticos

Desde sus orígenes la insaciable curiosidad del ser humano ha llevado al desarrollo acelerado de la filogenética, rama de la biología que se encarga de determinar las relaciones evolutivas entre individuos a través de matrices de ADN y morfología. Esta reconstrucción filogenética es el final de un extenso proceso. Este trabajo se centrará en dos partes muy específicas de la filogenética, analizando todos sus elementos matemáticos: la reconstrucción filogenética y los modelos evolutivos. En el primer capítulo se exponen las definiciones, propiedades básicas sobre árboles filogenéticos así como combinatoria básica de estos grafos. Se distinguen dos distancias fundamentales: la distancia ultramétrica, una distancia que permite aplicar el algoritmo UPGMA para la reconstrucción del árbol que relaciona las especies y por otro lado, la distancia aditiva, que tiene asociado un algoritmo mucho más general pero más complejo, el algoritmo Neighbour-Joining. Sin olvidar, que también existen métodos algebraicos que pueden reconstruir dicho árbol como es mínimos cuadrados. Una vez obtenido el árbol que relaciona a las especies, en el segundo capítulo se asocia a estas especies sus secuencias de ADN. Primero, se introduce un método para medir la compatibilidad de estas secuencias con el árbol que las relaciona, mediante el algoritmo Fitch-Hartigan. A partir de cadenas de Markov en tiempo contínuo, se ajusta el modelo evolutivo que mejor refleje el proceso de mutación en el árbol, empezando por un modelo básico y extendiéndolo a un modelo general en el que se permite modificar la variabilidad de los nucleótidos en la secuencia y la velocidad a la que éstos mutan. Además mediante máxima verosimilitud se expone un método de comparación entre los distintos modelos evolutivos. Finalmente, en el capítulo tres se aplican todos los conceptos descritos en los capítulos anteriores a dos conjuntos de datos, uno compuesto de secuencias de ADN de catorce mamíferos y el otro conjunto compuesto de rasgos fenotípicos de una especie de pájaros del género Geospiza

Synthesis of bis(tert-butyl)cyclopentadienyl derivatives of titanium and zirconium. NMR spectra and dynamic behavior of the base-free [Zr(1,3-tBu2-µ5-C5H3)(CH2Ph)2]+ cation

Reaction of Si(1,3-tBu2-C5H3)Me3 with MCl4 (M = Ti, Zr) in toluene or hexane at room temp. affords the new trichloromonociclopentadienyl-type derivs. [M(1,3-tBu2-η5-C5H3)Cl3] [M = Ti (2), Zr (3)]. Treatment of complexes 2 and 3 with appropriate alkylating reagents in hexane gives the 1,3-di(tert-butyl)cyclopentadienyl trialkyl titanium and zirconium complexes [M(1,3-tBu2-η5-C5H3)R3] [M = Ti, R = CH3, CH2Ph; M = Zr, R = CH3, CH2Ph (7), CH2CMe2Ph]. Interestingly, when 2 reacts with 3.1 equiv of LiCH2CMe2Ph in hexane at room temp. the ring-tert-butyl-metalated complex [Ti(1-tBu-3-CMe2CH2-η5-C5H3) (CH2CMe2Ph)2] was isolated in 90% yield. The cationic mono(1,3-di-(tert-butyl)cyclopentadienyl) dibenzyl zirconium species [Zr(1,3-tBu2-η5-C5H3)(CH2Ph)2]+, generated in situ by reaction of the tribenzyl complex 7 with B(C6F5)3 or [CPh3]+[B(C6F5)4]- reagents, is reported and their dynamic NMR behavior in CD2Cl2 solns. at low temps. is studied.Financial support for this research by DGICYT (Project\ud PB92-0178-C) is gratefully acknowledged. J.I.A.\ud acknowledges Repsol Petróleo S.A. for a fellowship

Sparse matrix-vector and matrix-multivector products for the truncated SVD on graphics processors

Many practical algorithms for numerical rank computations implement an iterative procedure that involves repeated multiplications of a vector, or a collection of vectors, with both a sparse matrix A and its transpose. Unfortunately, the realization of these sparse products on current high performance libraries often deliver much lower arithmetic throughput when the matrix involved in the product is transposed. In this work, we propose a hybrid sparse matrix layout, named CSRC, that combines the flexibility of some well-known sparse formats to offer a number of appealing properties: (1) CSRC can be obtained at low cost from the popular CSR (compressed sparse row) format; (2) CSRC has similar storage requirements as CSR; and especially, (3) the implementation of the sparse product kernels delivers high performance for both the direct product and its transposed variant on modern graphics accelerators thanks to a significant reduction of atomic operations compared to a conventional implementation based on CSR. This solution thus renders considerably higher performance when integrated into an iterative algorithm for the truncated singular value decomposition (SVD), such as the randomized SVD or, as demonstrated in the experimental results, the block Golub–Kahan–Lanczos algorithm

Evolution of the political opinion landscape during electoral periods

We present a study of the evolution of the political landscape during the 2015 and 2019 presidential elections in Argentina, based on data obtained from the micro-blogging platform Twitter. We build a semantic network based on the hashtags used by all the users following at least one of the main candidates. With this network we can detect the topics that are discussed in the society. At a difference with most studies of opinion on social media, we do not choose the topics a priori, they emerge from the community structure of the semantic network instead. We assign to each user a dynamical topic vector which measures the evolution of her/his opinion in this space and allows us to monitor the similarities and differences among groups of supporters of different candidates. Our results show that the method is able to detect the dynamics of formation of opinion on different topics and, in particular, it can capture the reshaping of the political opinion landscape which has led to the inversion of result between the two rounds of 2015 election.Fil: Mussi Reyero, Tomás. Universidad de Buenos Aires. Facultad de Ingeniería; ArgentinaFil: Beiro, Mariano Gastón. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Houssay. Instituto de Tecnologías y Ciencias de la Ingeniería "Hilario Fernández Long". Universidad de Buenos Aires. Facultad de Ingeniería. Instituto de Tecnologías y Ciencias de la Ingeniería "Hilario Fernández Long"; ArgentinaFil: Alvarez Hamelin, José Ignacio. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Houssay. Instituto de Tecnologías y Ciencias de la Ingeniería "Hilario Fernández Long". Universidad de Buenos Aires. Facultad de Ingeniería. Instituto de Tecnologías y Ciencias de la Ingeniería "Hilario Fernández Long"; ArgentinaFil: Hernández, Laura. No especifíca;Fil: Kotzinos, Dimitris. No especifíca