Occurrence of the Oribatid Mite Trhypochthoniellus longisetus longisetus (Acari: Trhypochthoniidae) on Tilapia (Oreochromis niloticus).

Mites as parasites infesting fish have been described in a few case reports involving Histiostoma anguillarum, H. papillata, and Schwiebea estradai. We describe the unexpected occurrence of oribatid mites of the genus Trhypochthoniellus on farmed tilapia Oreochromis niloticus. The fish had mites on the skin, fins, and gills, as well as in the mouth. The morphological characteristics of the mites, observed by optical and scanning electron microscopy, were consistent with those described for T. longisetus longisetus. All stages of development were observed, suggesting that the mites were able to actively reproduce on fis

Optimasi Portofolio Resiko Menggunakan Model Markowitz MVO Dikaitkan dengan Keterbatasan Manusia dalam Memprediksi Masa Depan dalam Perspektif Al-Qur`an

Risk portfolio on modern finance has become increasingly technical, requiring the use of sophisticated mathematical tools in both research and practice. Since companies cannot insure themselves completely against risk, as human incompetence in predicting the future precisely that written in Al-Quran surah Luqman verse 34, they have to manage it to yield an optimal portfolio. The objective here is to minimize the variance among all portfolios, or alternatively, to maximize expected return among all portfolios that has at least a certain expected return. Furthermore, this study focuses on optimizing risk portfolio so called Markowitz MVO (Mean-Variance Optimization). Some theoretical frameworks for analysis are arithmetic mean, geometric mean, variance, covariance, linear programming, and quadratic programming. Moreover, finding a minimum variance portfolio produces a convex quadratic programming, that is minimizing the objective function ðð¥with constraintsð ð 𥠥 ðandð´ð¥ = ð. The outcome of this research is the solution of optimal risk portofolio in some investments that could be finished smoothly using MATLAB R2007b software together with its graphic analysis

Search for supersymmetry in events with one lepton and multiple jets in proton-proton collisions at root s=13 TeV

Peer reviewe

Measurement of the Splitting Function in &ITpp &ITand Pb-Pb Collisions at root&ITsNN&IT=5.02 TeV

Data from heavy ion collisions suggest that the evolution of a parton shower is modified by interactions with the color charges in the dense partonic medium created in these collisions, but it is not known where in the shower evolution the modifications occur. The momentum ratio of the two leading partons, resolved as subjets, provides information about the parton shower evolution. This substructure observable, known as the splitting function, reflects the process of a parton splitting into two other partons and has been measured for jets with transverse momentum between 140 and 500 GeV, in pp and PbPb collisions at a center-of-mass energy of 5.02 TeV per nucleon pair. In central PbPb collisions, the splitting function indicates a more unbalanced momentum ratio, compared to peripheral PbPb and pp collisions.. The measurements are compared to various predictions from event generators and analytical calculations.Peer reviewe

Search for electroweak production of charginos in final states with two tau leptons in pp collisions at root s=8 TeV

Results are presented from a search for the electroweak production of supersymmetric particles in pp collisions in final states with two T leptons. The data sample corresponds to an integrated luminosity between 18.1 fb(-1) and 19.6 fb(-1) depending on the final state of T lepton decays, at root s = 8 TeV, collected by the CMS experiment at the LHC. The observed event yields in the signal regions are consistent with the expected standard model backgrounds. The results are interpreted using simplified models describing the pair production and decays of charginos or T sleptons. For models describing the pair production of the lightest chargino, exclusion regions are obtained in the plane of chargino mass vs. neutralino mass under the following assumptions: the chargino decays into third-generation sleptons, which are taken to be the lightest sleptons, and the sleptons masses lie midway between those of the chargino and the neutralino. Chargino masses below 420 GeV are excluded at a 95% confidence level in the limit of a massless neutralino, and for neutralino masses up to 100 GeV, chargino masses up to 325 GeV are excluded at 95% confidence level. Constraints are also placed on the cross section for pair production of T sleptons as a function of mass, assuming a massless neutralino.Peer reviewe

Search for anomalous couplings in boosted WW/WZ -> l nu q(q)over-bar production in proton-proton collisions at root s=8TeV

Peer reviewe

Inclusive Search for a Highly Boosted Higgs Boson Decaying to a Bottom Quark-Antiquark Pair

© 2018 CERN. An inclusive search for the standard model Higgs boson (H) produced with large transverse momentum (pT) and decaying to a bottom quark-antiquark pair (bb) is performed using a data set of pp collisions at s=13 TeV collected with the CMS experiment at the LHC. The data sample corresponds to an integrated luminosity of 35.9 fb-1. A highly Lorentz-boosted Higgs boson decaying to bb is reconstructed as a single, large radius jet, and it is identified using jet substructure and dedicated b tagging techniques. The method is validated with Z→bb decays. The Z→bb process is observed for the first time in the single-jet topology with a local significance of 5.1 standard deviations (5.8 expected). For a Higgs boson mass of 125 GeV, an excess of events above the expected background is observed (expected) with a local significance of 1.5 (0.7) standard deviations. The measured cross section times branching fraction for production via gluon fusion of H→bb with reconstructed pT > 450 GeV and in the pseudorapidity range -2.5 < η < 2.5 is 74±48(stat)-10+17(syst) fb, which is consistent within uncertainties with the standard model prediction

Search for new phenomena in final states with two opposite-charge, same-flavor leptons, jets, and missing transverse momentum in pp collisions at √s=13 TeV

Search results are presented for physics beyond the standard model in final states with two opposite-charge, same-flavor leptons, jets, and missing transverse momentum. The data sample corresponds to an integrated luminosity of 35.9 fb−1 of proton-proton collisions at s√=13 TeV collected with the CMS detector at the LHC in 2016. The analysis uses the invariant mass of the lepton pair, searching for a kinematic edge or a resonant-like excess compatible with the Z boson mass. The search for a kinematic edge targets production of particles sensitive to the strong force, while the resonance search targets both strongly and electroweakly produced new physics. The observed yields are consistent with the expectations from the standard model, and the results are interpreted in the context of simplified models of supersymmetry. In a gauge mediated supersymmetry breaking (GMSB) model of gluino pair production with decay chains including Z bosons, gluino masses up to 1500–1770 GeV are excluded at the 95% confidence level depending on the lightest neutralino mass. In a model of electroweak chargino-neutralino production, chargino masses as high as 610 GeV are excluded when the lightest neutralino is massless. In GMSB models of electroweak neutralino-neutralino production, neutralino masses up to 500-650 GeV are excluded depending on the decay mode assumed. Finally, in a model with bottom squark pair production and decay chains resulting in a kinematic edge in the dilepton invariant mass distribution, bottom squark masses up to 980–1200 GeV are excluded depending on the mass of the next-to-lightest neutralino

Search for electroweak production of charginos and neutralinos in multilepton final states in proton-proton collisions at root s=13 TeV

Results are presented from a search for the direct electroweak production of charginos and neutralinos in signatures with either two or more leptons (electrons or muons) of the same electric charge, or with three or more leptons, which can include up to two hadronically decaying tau leptons. The results are based on a sample of protonproton collision data collected at p s = 13TeV, recorded with the CMS detector at the LHC, corresponding to an integrated luminosity of 35.9 fb1. The observed event yields are consistent with the expectations based on the standard model. The results are interpreted in simpli ed models of supersymmetry describing various scenarios for the production and decay of charginos and neutralinos. Depending on the model parameters chosen, mass values between 180GeV and 1150 GeV are excluded at 95% CL. These results signi cantly extend the parameter space probed for these particles in searches at the LHC. In addition, results are presented in a form suitable for alternative theoretical interpretations.Sponsoring Consortium for Open Access Publishing in Particle Physic

Optimización y caracterización del diseño de un mini manipulador endoscópico de doble brazo

[ES] La introducción de la cirugía mínimamente invasiva (MIS), en particular de técnicas como la cirugía endoscópica flexible (FES), está notablemente relacionada con la mejora de las capacidades mecánicas de los instrumentos quirúrgicos, así como de su creciente aptitud para ser reprocesados médicamente. El objetivo principal del trabajo actual es, por una parte, optimizar el diseño mecánico de un instrumento quirúrgico endoscópico compuesto de varios mecanismos flexibles, también denominados compliant mechanisms. La optimización debe de ser tal que le permita llevar a cabo la tarea para la que fue inicialmente diseñado, la resección transuretral de tumores vesicales. La influencia de diferentes parámetros se probará en un modelo extraído de manera experimental, en particular la longitud, L; ancho, b; y espesor, h, del mecanismo. Por otra parte, y debido a la complejidad de su diseño, existe la necesidad de verificar su aptitud para ser esterilizado. Para ello, una serie de experimentos han servido para la redacción de una guía en términos de reprocesado médico mediante el método de calor húmedo o esterilización por vapor, también conocido como autoclave. Esta guía es aplicable a todo tipo de instrumentos cilíndricos huecos de acero inoxidable con paredes de espesor reducido así esterilizados, y proporciona información sobre la procesabilidad de un lumen de longitud y diámetro interno determinados. Finalmente se obtiene experimentalmente un modelo final capaz de predecir el comportamiento mecánico del mecanismo para un rango de valores geométricos adaptados a las necesidades del manipulador quirúrgico en cuestión. Este modelo describe el comportamiento de dicha estructura en términos de resistencia y flexibilidad y, en particular, proporciona el máximo ángulo de deflexión, con un error medio de 0,75º ± 0,72º, que el mecanismo puede alcanzar antes de experimentar el fallo mecánico, es decir, la deformación plástica. Se obtiene que las únicas variables influyentes son la longitud y el espesor del mismo. La validación final del modelo debe de ser considerada como uno de los trabajos futuros más inmediatos. En lo referente a su procesabilidad médica, se logra encontrar un método de inoculación directo adecuado para geometrías pequeñas y complejas como las existentes en los instrumentos quirúrgicos destinados a la microcirugía que no pueden incorporar técnicas de medición tradicionales. Este método consistente en un paso de descarga donde la superficie interna del lumen es contaminada directamente con la carga microbiana. De los experimentos se deduce que los diámetros pequeños obstaculizan en mayor medida el proceso de esterilización y, en particular, los lúmenes estrechos con diámetros interiores inferiores a 1 mm no pueden ser esterilizados mediante autoclave. Las afirmaciones sobre los lúmenes de diámetro interior entre 1 y 2 mm muestran una tendencia según la cual la longitud del lumen favorece el proceso de esterilización, lo que debería investigarse más profundamente con un número de pruebas más representativo. Lúmenes con un diámetro interno de 5 mm no presentan crecimiento bacteriano alguno, considerados por tanto como geometrías estériles.[EN] The introduction of minimally invasive surgery (MIS), in particular techniques such as flexible endoscopic surgery (FES), is remarkably related to the improvement of the mechanical capabilities of surgical instruments, as well as their increasing aptitude to be medically reprocessed. The main objective of the current work is, on the one hand, to optimize the mechanical design of an endoscopic surgical instrument composed of several flexible mechanisms, also called compliant mechanisms. The optimization must be such that it allows it to carry out the task for which it was initially designed, the transurethral resection of bladder tumors. The influence of different parameters will be tested on an experimentally extracted model, in particular the length, L; width, b; and thickness, h, of the mechanism. On the other hand, and due to the complexity of its design, there is a need to verify its suitability for sterilization. To this end, a series of experiments have been used to write a guide in terms of medical reprocessing using the moist heat method or steam sterilization, also known as autoclave. This guide is applicable to all types of hollow stainless steel cylindrical instruments with thus sterilized thin-walled walls, and provides information on the processability of a lumen of determined length and internal diameter. Finally, a final model is obtained experimentally, capable of predicting the mechanical behaviour of the mechanism for a range of geometric values adapted to the needs of the surgical manipulator in question. This model describes the behaviour of this structure in terms of strength and flexibility and, in particular, provides the maximum deflection angle, with an average error of 0.75º ± 0.72º, which the mechanism can reach before experiencing mechanical failure, i.e. plastic deformation. It is obtained that the only influential variables are its length and thickness. The final validation of the model must be considered as one of the most immediate future works. With regard to its medical processability, a direct inoculation method suitable for small and complex geometries such as those existing in surgical instruments intended for microsurgery that cannot incorporate traditional measurement techniques can be found. This method consists of a discharge step where the internal surface of the lumen is directly contaminated with the microbial load. Experiments show that small diameters are a major obstacle to the sterilization process and, in particular, narrow lumens with inner diameters of less than 1 mm cannot be autoclaved. Claims about lumens with an internal diameter between 1 and 2 mm show a trend whereby the length of the lumen favours the sterilisation process, which should be further investigated with a more representative number of tests. Lumens with an internal diameter of 5 mm do not show any bacterial growth and are therefore considered sterile geometries.Olmeda Palomar, M. (2017). Optimización y caracterización del diseño de un mini manipulador endoscópico de doble brazo. http://hdl.handle.net/10251/144781TFG