Non-Unitary Neutrino Propagation From Neutrino Decay

Neutrino propagation in space-time is not constrained to be unitary if very light states - lighter than the active neutrinos - exist into which neutrinos may decay. If this is the case, neutrino flavor-change is governed by a handful of extra mixing and "oscillation" parameters, including new sources of CP-invariance violation. We compute the transition probabilities in the two- and three-flavor scenarios and discuss the different phenomenological consequences of the new physics. These are qualitatively different from other sources of unitarity violation discussed in the literature.Comment: 8 pages, no figure

Phenotypic selection under two contrasting environments in wild sunflower and its crop‐wild hybrid

Hybridization is a common phenomenon in plants and can lead to the introgression of alleles from one population into another, generate new hybrid lineages, or cause species extinction. The environmental conditions and the genetic background of the participating populations may influence these outcomes since they can affect the fitness of hybrids, thereby increasing or decreasing the chances of introgression. Thus, it is important to understand the context‐dependent prospects for introgression of alleles into diverse populations and under multiple ecological environments. Crop‐wild hybridization presents an opportunity to explore these dynamics in agroecosystems. To this end, we used diverse wild and hybrid sunflowers from across the northern United States as a basis for evaluating variation in morphological traits and assessing context‐dependence selection. These crop‐wild hybrids and their wild counterparts were grown under agricultural conditions in the field with and without wheat competition. Interactions between origin and cross type affected expression of early functional traits, while interactions between competition and cross type acted on reproductive traits. A smattering of early and reproductive traits were affected by interactions between cross type and competition that varied by origin (i.e., 3‐way interactions). Seven functional traits, especially number of branches and tertiary head diameter, underwent net and direct directional selection, while six out of these seven traits appear to also be experiencing non‐linear selection dynamics. In general, wild‐like traits were favored under both sets of conditions, while, under wheat competition, some crop‐like traits related to fast growth and primary head diameter became important. These data reaffirm the hypothesis that stressful conditions establish a scenario more suitable for crop introgression and clarify that non‐linear selection dynamics may play a role in this process.Fil: Presotto, Alejandro Daniel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Centro de Recursos Naturales Renovables de la Zona Semiárida. Universidad Nacional del Sur. Centro de Recursos Naturales Renovables de la Zona Semiárida; Argentina. Universidad Nacional del Sur. Departamento de Agronomía; ArgentinaFil: Hernández, Fernando. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Centro de Recursos Naturales Renovables de la Zona Semiárida. Universidad Nacional del Sur. Centro de Recursos Naturales Renovables de la Zona Semiárida; Argentina. Universidad Nacional del Sur. Departamento de Agronomía; ArgentinaFil: Mercer, Kristin L.. Ohio State University; Estados Unido

El cotilo de impactación en las artroplastias de cadera

Entre los diferentes sistemas de fijación de la cúpula acetabular entre las artroplastias no cementadas, la impactación tiene múltiples ventajas. Permite un mejor contacto entre implante y hueso y no necesita destrucción de la superficie ósea receptora. Los nuevos diseños para impactación están fabricados en aleaciones de titanio y poseen una superficie rugosa recubierta a su vez con hidroxiapatita. Algunos modelos como la artroplatia Bihapro poseen aletas estabilizadoras en su reborde externo para evitar la movilización rotatoria inicial. El sistema de impactación está mostrando buenos resultados de la experiencia conocida y aunque los periodos de seguimiento son aún cortos, la integración ósea conseguida es satisfactoria. Se presentan los resultados de 1107 cúpulas Bihapro con una evolución entre uno y siete años, que han seguido un protocolo de seguimiento informatizado. En sólo un caso se presentó movilización del componente que precisó cirugía de revisión.The acetabular fixation by impaction has advantages on other systems of fixing in the cementless arthroplaties of the hip. Permit a better contact between implant and bone and it does not need destruction of the receiving bony surface. The new designs for fixation by impaction are manufactured in titanium alloys and possess a rugged surface cover at the same time with hyrdoxiapatite-coated. Some models as the arthroplasty Bihapro possess fins for primary stability in your external curbing to avoid the initial rotary mobilization. This system of fixation is showing good results in the known experience and though the periods of follow-up are yet short, the obtained bony integration is satisfactory. We presented the results of 117 Bihapro cups implanted with a follow-up from one to seven years, that they have followed a computed protocol. In only a case was presented loosening of the component that specified review surgery

Structure of Thermoreversible Poly(vinyl alcohol) Cryo-Hydrogels as studied by Proton Low Field NMR Spectroscopy

The network structure of Poly(vinyl alcohol) (PVA) hydrogels obtained by freezing-thawing cycles was investigated by solid state 1H low field NMR spectroscopy. By application of multiple-quantum NMR experiments, we obtain information about the segmental order parameter, which is directly related to the restrictions to chain motion (crosslinks) formed upon gelation. These measurements indicate that the network mesh size, as well as the relative amount of non-elastic defects (i.e. non-crosslinked chains, dangling chains, loops) decreases with the number of freezing-thawing cycles, but it is independent of the polymer concentration. The formation of the PVA network is accompanied by an increasing fraction of polymer with fast magnetization decay (∼20μs). The quantitative study of this rigid phase with a specific refocusing pulse sequence shows that it is composed of a primary crystalline polymer phase (around 5%), which constitutes the main support of the network structure and determines the mesh size, and a secondary population of more imperfect crystallites, which increase the number of elastic chain segments in the polymer gel but does not affect the average network mesh size appreciably. Correspondingly, progressive melting of the secondary crystallites with increasing temperature does not affect the network mesh size but only the amount of network defects, and melting of the main PVA crystallites at around 80 ºC leads to destruction of the network gel and formation of an isotropic PVA solution.Peer reviewe

Deep Learning for Diagonal Earlobe Crease Detection

An article published on Medical News Today in June 2022 presented a fundamental question in its title: Can an earlobe crease predict heart attacks? The author explained that end arteries supply the heart and ears. In other words, if they lose blood supply, no other arteries can take over, resulting in tissue damage. Consequently, some earlobes have a diagonal crease, line, or deep fold that resembles a wrinkle. In this paper, we take a step toward detecting this specific marker, commonly known as DELC or Frank's Sign. For this reason, we have made the first DELC dataset available to the public. In addition, we have investigated the performance of numerous cutting-edge backbones on annotated photos. Experimentally, we demonstrate that it is possible to solve this challenge by combining pre-trained encoders with a customized classifier to achieve 97.7% accuracy. Moreover, we have analyzed the backbone trade-off between performance and size, estimating MobileNet as the most promising encoder.Comment: Accepted at 12th International Conference on Pattern Recognition Applications (ICPRAM 2023

Phenomenological aspects of the fermion and scalar sectors of a S4S_4 flavored 3-3-1 model

We propose a viable and predictive model based on the $SU(3)_C \times SU(3)_L \times U(1)_X$ gauge symmetry, supplemented by the global $U(1)_{Lg}$ symmetry, the $S_4$ family symmetry and several auxiliary cyclic symmetries, which successfully reproduces the observed SM fermion mass and mixing pattern. The SM charged fermion mass and quark mixing hierarchy is caused by the spontaneous breaking of the discrete symmetries, whereas the tiny active neutrino masses are generated through an inverse seesaw mechanism mediated by right-handed Majorana neutrinos. The model is consistent with the SM fermion masses and mixings and successfully accommodates the current Higgs diphoton decay rate constraints as well as the constraints arising from oblique $S$, $T$ and $U$ parameters and meson oscillations.Comment: 23 pages, 7 figure

Polarized cortical tension drives zebrafish epiboly movements

The principles underlying the biomechanics of morphogenesis are largely unknown. Epiboly is an essential embryonic event in which three tissues coordinate to direct the expansion of the blastoderm. How and where forces are generated during epiboly, and how these are globally coupled remains elusive. Here we developed a method, hydrodynamic regression (HR), to infer 3D pressure fields, mechanical power, and cortical surface tension profiles. HR is based on velocity measurements retrieved from 2D+T microscopy and their hydrodynamic modeling. We applied HR to identify biomechanically active structures and changes in cortex local tension during epiboly in zebrafish. Based on our results, we propose a novel physical description for epiboly, where tissue movements are directed by a polarized gradient of cortical tension. We found that this gradient relies on local contractile forces at the cortex, differences in elastic properties between cortex components and the passive transmission of forces within the yolk cell. All in all, our work identifies a novel way to physically regulate concerted cellular movements that might be instrumental for the mechanical control of many morphogenetic processes.Peer ReviewedPostprint (author's final draft

Impact of Procedure Manual in a Cleaning Company

This project is developed in a cleaning company, which we will call "Clean Express" to maintain the anonymity of the same, said company is located Boca del Rio, Veracruz, Mexico. According to Gido in 2012, the case study company has a functional type structure because the departments group the areas

Los tornillos como método suplementario de fijación de las cúpulas acetabulares: Utilidad de la digitalización de imágenes

La fijación suplementaria con tornillos de los componentes acetabulares hemisféricos no cementados es utilizada para proporcionar estabilidad primaria al implante. No obstante su empleo se asocia a un mayor riesgo de lesiones neurovasculares, complicaciones propias de los tornillos e incremento de osteolisis. Se han estudiado retrospectivamente las radiografías de 30 cúpulas cotiloideas no cementadas modelo Bihapro, suplementadas con tornillos, con un seguimiento mínimo de 5 años. Se utilizó, además, un programa de análisis y procesamiento de imágenes por ordenador. No se produjeron lesiones neurovasculares o viscerales, no se apreció ninguna movilización de la cúpula y sólo se observó un caso e osteolisis alrededor de un tornillo en un paciente sometido a cirugía de revisión. La digitalización de imágenes es una técnica que permite entre otras ventajas graduar densidades óseas periprotésicas facilitando un diagnóstico precoz de zonas líticas y microdeslizamientos protésicos, eliminando la subjetividad del observador.The supplementary fixation with screws non-cemented acetabular hemispheric components is used to provide primary stability to the implants. However, their use has been associated to a bigger risk of neurological and vascular damage, characteristic complications of the screws and osteolysis. The X-rays of 30 non-cemented acetabular cups model Bihapro supplemented with screws have been studied retrospectively with a 5 year-old minimum follow-up. It was also used an analysis program and computer store of images. No neurological or vascular damage took place. Any mobilization of the cup was not appreciated and only in one case of an osteolytic area was observed around a screw in a patient who unfderwent revision surgery. The digitalization of images is a technique that allows among other advantages to graduate periprosthetic bone densities facilitating an early diagnose of lytic areas and prosthetic micromovements eliminating the observer's subjectivity

Osteopoiquilia: A propósito de 2 casos

La osteopoiquilosis es una rara displasia ósea esclerosante. Su diagnóstico es normalmente hecho de forma accidental de radiografías que muestran múltiples áreas escleróticas en diversos huesos del esqueleto. Su diagnóstico diferencial se realiza con la melorreostosis, osteopatía estriada y metástasis osteobásticas, en base a la clínica, radiología y gammagrafía. Histológicamente aparecen condensaciones focales de hueso lamelar compacto dentro de la esponjosa. Nosotros recogemos 2 casos de osteopoiquilosis y se hace a su vez un recuerdo.Osteopoikilosis, is a rare sclerosing bone dysplasia. The diagnosis is usually made incidentally from radiographs with show multiple sclerotic areas in several bones of the body. The differential diagnosis from melorheostosis, osteophatia striata and specially from osteoblastic bone metastases, on the basis of the clinical, radiological and radionuclide scanning characteristics. Histologically, there are focal condensations of compact lamellar bone within the spongiosa. We report two case osteopoikilosis