Propuesta de un nuevo índice para la gestión de la reputación online de hoteles

Aim: To develop a procedure for the calculation of a new online reputation index, inrelation to TripAdvisor user ratings, which helps create a hotel ranking, and improvestrategic marketing guidelines.Methods and techniques: Analysis and synthesis, induction-deduction, and historical-logic. The second group of methods included expert opinion, survey, Spearmancorrelation coefficient, and Kendall Tau-b coefficient. SPSS, 22 was used for statisticaldata processing.Main results: The new procedure proposal is based on calculation of the onlinereputation index during the period studied, which overcomes previously existinglimitations, and assigns a value to every hotel scoring received according to hotel size.The methodological proposal makes the establishment of a hotel ranking possible,according to hotel typology, and also permits to enhance strategic marketing guidelines.Conclusions: The procedure meets the objectives set, by implementing its phasesproperly, which shows the capacity of responding to the characteristics needed in thisscenario. The new ranking is regarded as valid, based on the analysis of statistical data.The findings of this study will permit to make decisions in order to improve strategicprocesses, and implement policies to optimize critical processes in the hotel sector.Objetivo: Desarrollar un procedimiento para el cálculo de un nuevo índice de reputación online asociado a las puntuaciones de los usuarios en TripAdvisor, que permita la confección del ranking de hoteles así como la mejora de las directrices estratégicas de la comercialización. Métodos y técnicas: Análisis-síntesis, inducción-deducción y el histórico lógico; además del criterio de expertos, la encuesta, el coeficiente de correlación de Spearman y el coeficiente Tau-b de Kendall. Para el procesamiento de los datos se utilizó el software estadístico SPSS vs- 22. Principales resultados: El procedimiento propone calcular un nuevo Índice de reputación online del período, que supera las limitaciones existentes y asigna valor a cada puntuación recibida por un hotel, tomando en consideración su tamaño. La propuesta metodológica permite comprobar que es posible la confección del ranking de hoteles según su tipología y perfeccionar las directrices estratégicas de la comercialización. Conclusiones: El procedimiento cumple con los objetivos propuestos, implementa de forma adecuada las fases que lo componen y tiene la capacidad de responder a las características necesarias para el contexto. El nuevo ranking es considerado válido según los datos estadísticos alcanzados. Los resultados obtenidos permitirán tomar decisiones en función de mejorar los procesos estratégicos y desarrollar políticas para perfeccionar procesos claves de la empresa hotelera

Propuesta de un nuevo índice para la gestión de la reputación online de hoteles

Objetivo:  Desarrollar  un  procedimiento  para  el  cálculo  de  un  nuevo  índice  de reputación online asociado a las puntuaciones de los usuarios en TripAdvisor, que permita la confección del ranking de hoteles así como la mejora de las directrices estratégicas de la comercialización. Métodos y técnicas: Análisis-síntesis, inducción-deducción y el histórico lógico; además del criterio de expertos, la encuesta, el coeficiente de correlación de Spearman y el coeficiente Tau-b de Kendall. Para el procesamiento de los datos se utilizó el software estadístico SPSS vs- 22. Principales resultados: El procedimiento propone calcular un nuevo Índice de reputación online del período, que supera las limitaciones existentes y asigna valor a cada puntuación recibida por un hotel, tomando en consideración su tamaño. La propuesta metodológica permite comprobar que es posible la confección del ranking de hoteles según su tipología y perfeccionar las directrices estratégicas de la comercialización. Conclusiones: El procedimiento cumple con los objetivos propuestos, implementa de forma adecuada las fases que lo componen y tiene la capacidad de responder a las características necesarias para el contexto. El nuevo ranking es considerado válido según los datos estadísticos alcanzados. Los resultados obtenidos permitirán tomar decisiones en función de mejorar los procesos estratégicos y desarrollar políticas para perfeccionar procesos claves de la empresa hotelera.

Small molecule anion carriers facilitate lactate transport in model liposomes and cells

An excessive production of lactate by cancer cells fosters tumor growth and metastasis. Therefore, targeting lactate metabolism and transport offers a new therapeutic strategy against cancer, based on dependency of some cancer cells for lactate as energy fuel or as oncogenic signal. Herein we present a family of anionophores based on the structure of click-tambjamines that have proved to be extremely active lactate carriers across phospholipid membranes. Compound 1, the most potent lactate transmembrane carrier, was studied in HeLa cells. The use of a monocarboxylate transporters (MCTs) inhibitor proved that 1 is an active lactate transporter in living cells, confirming the results obtained in phospholipid vesicles. Moreover, an additive effect of compound 1 with cisplatin was observed in HeLa cells. Identification of active lactate anionophores working in living cells opens up ways to exploit this class of compounds as molecular tools and drugs addressing dysregulated lactate metabolism

Respuesta inmune en la infección por el virus del Ébola

El virus del Ébola pertenece a la familia de los filovirus y produce una fiebre hemorrágica con una elevada letalidad. Los pacientes afectados muestran una respuesta inmune deteriorada como consecuencia de los mecanismos de evasión del virus. La catepsina es una enzima presente en los gránulos de los fagocitos que escinde las glicoproteínas de la superficie viral, permitiendo al virus la entrada a la célula anfitriona. Por otro lado, este virus es resistente a los efectos antivirales del interferón tipo I, promueve la síntesis de citoquinas proinflamatorias e induce la apoptosis de los monocitos y los linfocitos. Otros efectos del mismo son: inducir una activación incompleta de las células dendríticas con lo que evita la presentación de los antígenos virales. A pesar de que después de la primera semana se producen anticuerpos específicos, estos tienen una capacidad neutralizante dudosa. El virus evade la respuesta inmune y se replica de forma incontrolada en el hospedero. Se realizó este trabajo con el propósito de resumir los principales aspectos relacionados con las particularidades de la respuesta inmune durante la infección por el virus del Ébola

Clinical validation of risk scoring systems to predict risk of delayed bleeding after EMR of large colorectal lesions

[Background and Aims]: The Endoscopic Resection Group of the Spanish Society of Endoscopy (GSEED-RE) model and the Australian Colonic Endoscopic Resection (ACER) model were proposed to predict delayed bleeding (DB) after EMR of large superficial colorectal lesions, but neither has been validated. We validated and updated these models.[Methods]: A multicenter cohort study was performed in patients with nonpedunculated lesions ≥20 mm removed by EMR. We assessed the discrimination and calibration of the GSEED-RE and ACER models. Difficulty performing EMR was subjectively categorized as low, medium, or high. We created a new model, including factors associated with DB in 3 cohort studies.[Results]: DB occurred in 45 of 1034 EMRs (4.5%); it was associated with proximal location (odds ratio [OR], 2.84; 95% confidence interval [CI], 1.31-6.16), antiplatelet agents (OR, 2.51; 95% CI, .99-6.34) or anticoagulants (OR, 4.54; 95% CI, 2.14-9.63), difficulty of EMR (OR, 3.23; 95% CI, 1.41-7.40), and comorbidity (OR, 2.11; 95% CI, .99-4.47). The GSEED-RE and ACER models did not accurately predict DB. Re-estimation and recalibration yielded acceptable results (GSEED-RE area under the curve [AUC], .64 [95% CI, .54-.74]; ACER AUC, .65 [95% CI, .57-.73]). We used lesion size, proximal location, comorbidity, and antiplatelet or anticoagulant therapy to generate a new model, the GSEED-RE2, which achieved higher AUC values (.69-.73; 95% CI, .59-.80) and exhibited lower susceptibility to changes among datasets.[Conclusions]: The updated GSEED-RE and ACER models achieved acceptable prediction levels of DB. The GSEED-RE2 model may achieve better prediction results and could be used to guide the management of patients after validation by other external groups. (Clinical trial registration number: NCT 03050333.)Research support for this study was received from “La Caixa/Caja Navarra” Foundation (ID 100010434;project PR15/11100006)

Integrative epigenomics in Sjögren´s syndrome reveals novel pathways and a strong interaction between the HLA, autoantibodies and the interferon signature

Primary Sjögren's syndrome (SS) is a systemic autoimmune disease characterized by lymphocytic infiltration and damage of exocrine salivary and lacrimal glands. The etiology of SS is complex with environmental triggers and genetic factors involved. By conducting an integrated multi-omics study, we confirmed a vast coordinated hypomethylation and overexpression effects in IFN-related genes, what is known as the IFN signature. Stratified and conditional analyses suggest a strong interaction between SS-associated HLA genetic variation and the presence of Anti-Ro/SSA autoantibodies in driving the IFN epigenetic signature and determining SS. We report a novel epigenetic signature characterized by increased DNA methylation levels in a large number of genes enriched in pathways such as collagen metabolism and extracellular matrix organization. We identified potential new genetic variants associated with SS that might mediate their risk by altering DNA methylation or gene expression patterns, as well as disease-interacting genetic variants that exhibit regulatory function only in the SS population. Our study sheds new light on the interaction between genetics, autoantibody profiles, DNA methylation and gene expression in SS, and contributes to elucidate the genetic architecture of gene regulation in an autoimmune population

Photography-based taxonomy is inadequate, unnecessary, and potentially harmful for biological sciences

The question whether taxonomic descriptions naming new animal species without type specimen(s) deposited in collections should be accepted for publication by scientific journals and allowed by the Code has already been discussed in Zootaxa (Dubois & Nemésio 2007; Donegan 2008, 2009; Nemésio 2009a–b; Dubois 2009; Gentile & Snell 2009; Minelli 2009; Cianferoni & Bartolozzi 2016; Amorim et al. 2016). This question was again raised in a letter supported by 35 signatories published in the journal Nature (Pape et al. 2016) on 15 September 2016. On 25 September 2016, the following rebuttal (strictly limited to 300 words as per the editorial rules of Nature) was submitted to Nature, which on 18 October 2016 refused to publish it. As we think this problem is a very important one for zoological taxonomy, this text is published here exactly as submitted to Nature, followed by the list of the 493 taxonomists and collection-based researchers who signed it in the short time span from 20 September to 6 October 2016

The Fourteenth Data Release of the Sloan Digital Sky Survey: First Spectroscopic Data from the Extended Baryon Oscillation Spectroscopic Survey and from the Second Phase of the Apache Point Observatory Galactic Evolution Experiment

The fourth generation of the Sloan Digital Sky Survey (SDSS-IV) has been in operation since 2014 July. This paper describes the second data release from this phase, and the 14th from SDSS overall (making this Data Release Fourteen or DR14). This release makes the data taken by SDSS-IV in its first two years of operation (2014–2016 July) public. Like all previous SDSS releases, DR14 is cumulative, including the most recent reductions and calibrations of all data taken by SDSS since the first phase began operations in 2000. New in DR14 is the first public release of data from the extended Baryon Oscillation Spectroscopic Survey; the first data from the second phase of the Apache Point Observatory (APO) Galactic Evolution Experiment (APOGEE-2), including stellar parameter estimates from an innovative data-driven machine-learning algorithm known as "The Cannon"; and almost twice as many data cubes from the Mapping Nearby Galaxies at APO (MaNGA) survey as were in the previous release (N = 2812 in total). This paper describes the location and format of the publicly available data from the SDSS-IV surveys. We provide references to the important technical papers describing how these data have been taken (both targeting and observation details) and processed for scientific use. The SDSS web site (www.sdss.org) has been updated for this release and provides links to data downloads, as well as tutorials and examples of data use. SDSS-IV is planning to continue to collect astronomical data until 2020 and will be followed by SDSS-V

Measurement of the top quark forward-backward production asymmetry and the anomalous chromoelectric and chromomagnetic moments in pp collisions at √s = 13 TeV

Abstract The parton-level top quark (t) forward-backward asymmetry and the anomalous chromoelectric (d̂ t) and chromomagnetic (μ̂ t) moments have been measured using LHC pp collisions at a center-of-mass energy of 13 TeV, collected in the CMS detector in a data sample corresponding to an integrated luminosity of 35.9 fb−1. The linearized variable AFB(1) is used to approximate the asymmetry. Candidate t t ¯ events decaying to a muon or electron and jets in final states with low and high Lorentz boosts are selected and reconstructed using a fit of the kinematic distributions of the decay products to those expected for t t ¯ final states. The values found for the parameters are AFB(1)=0.048−0.087+0.095(stat)−0.029+0.020(syst),μ̂t=−0.024−0.009+0.013(stat)−0.011+0.016(syst), and a limit is placed on the magnitude of | d̂ t| < 0.03 at 95% confidence level. [Figure not available: see fulltext.

MUSiC : a model-unspecific search for new physics in proton-proton collisions at root s=13TeV

Results of the Model Unspecific Search in CMS (MUSiC), using proton-proton collision data recorded at the LHC at a centre-of-mass energy of 13 TeV, corresponding to an integrated luminosity of 35.9 fb(-1), are presented. The MUSiC analysis searches for anomalies that could be signatures of physics beyond the standard model. The analysis is based on the comparison of observed data with the standard model prediction, as determined from simulation, in several hundred final states and multiple kinematic distributions. Events containing at least one electron or muon are classified based on their final state topology, and an automated search algorithm surveys the observed data for deviations from the prediction. The sensitivity of the search is validated using multiple methods. No significant deviations from the predictions have been observed. For a wide range of final state topologies, agreement is found between the data and the standard model simulation. This analysis complements dedicated search analyses by significantly expanding the range of final states covered using a model independent approach with the largest data set to date to probe phase space regions beyond the reach of previous general searches.Peer reviewe