Moisture damage resistance of hot-mix asphalt made with paper industry wastes as filler

[Abstract:] Certain paper industry wastes display high recycling potential. In this investigation, the feasibility of using green liquor dregs and biomass fly ash from the paper industry as filler in hot-mix asphalt (HMA) for road pavement construction is analysed. Particularly, the moisture damage resistance (i.e., water sensitivity) of an AC 22 base B50/70 G has been studied using the Indirect Tensile Strength Test at the Marshall mix design optimum asphalt content. The most important filler properties have been determined to study water resistance: filler water content, grain size distribution using light scattering analysis techniques, morphology using a scanning electron microscope (SEM), chemical and mineralogical composition using X-ray fluorescence (XRF) and X-ray diffraction (XRD) techniques, detrimental fines content using the methylene blue test and the stiffening effect of the filler in the mastic by determining the ring and ball (R&B) softening temperature and the bitumen penetration grade. Additionally, the Rolling Bottle method and Boiling Water tests have been conducted to analyse the asphalt-aggregate bond. A control filler (i.e., commercial limestone filler) was used to compare the results. Also the mechanical properties (stiffness and resistance to the permanent deformation) of the mixtures were studied. As a result, it can be concluded that dregs have poor water resistance. Additionally, fly ash displayed inadequate water resistance for HMA

Retinal vessel local tortuosity under a macula-to-optic disc central-framing change

Some ocular and cardiovascular diseases can be detected through the increased tortuosity of retinal blood vessels. Objective tortuosity measures can be obtained from digital image analysis of a retinography. This study tested a set of local tortuosity indices under a change in the frame center (macula, optic disc) of the eye fundus image. We illustrate the effects of such a change on 40 pairs of vessels evaluated with eight tortuosity indices. We show that the frame center change caused significant differences in the mean values of the vast majority of the tortuosity indices analyzed. The index defined as the ratio of the curvature to the arc length of a vessel segment proved to be the most robust in relation to a frame center change. Experimental results obtained from the analysis of clinical images are provided and discussed.This research was funded by Agencia Estatal de Investigación of the Spanish Government, grant number PID2020-114582RB-I00/AEI/10.13039/501100011033.Peer ReviewedPostprint (published version

Moisture damage resistance of bituminous mixtures manufactured with waste biomass fly ashes form the paper industry as filler

Este póster foi presentado no congreso "8th EATA Asphalt Conference 2019", que foi organizado pola European Asphalt Technology Association e a Universidad de Granada, e que tivo lugar en Granada, entre o 3 e o 5 de xuño de 2019.[Abstract:] Biomass fly ashes (bioashes) are solid byproducts generated during the combustion of biomass. One of the main drawbacks of using biomass combustion as an energy source is the environmental management of the resulting bioashes. In this regard, some researchers have analysed the feasibility of using bioashes as filler for bituminous mixtures with encouraging results. Nevertheless, previous investigations concluded that the use of biomass waste fly ashes from the paper industry (BioFAPI) lead to bituminous mixtures with inadequate water resistance.Ministerio de Economía y Competitividad; ITC‐20133075Ministerio de Economía y Competitividad; BIA2010‐17751Ministerio de Economía y Competitividad; BES‐2011‐04437

Black–White Latino Racial Disparities in HIV Survival, Florida, 2000–2011

This research aimed to estimate Black/White racial disparities in all-cause mortality risk among HIV-positive Latinos. Florida surveillance data for Latinos diagnosed with HIV (2000–2008) were merged with 2007–2011 American Community Survey data. Crude and adjusted hazard ratios (aHR) were calculated using multi-level Cox regression. Of 10,903 HIV-positive Latinos, 8.2% were Black and 91.9% White. Black Latinos were at increased mortality risk compared with White Latinos after controlling for individual and neighborhood factors (aHR 1.40, 95% confidence interval (CI) 1.21–1.62). In stratified analyses, risk factors for Black Latinos included: age ¥60 years compared with ages 13–19 (aHR 4.63, 95% CI 1.32–16.13); US birth compared with foreign birth (aHR 1.56, 95% CI 1.16–2.11); diagnosis of AIDS within three months of HIV diagnosis (aHR 3.53, 95% CI 2.64–4.74); residence in the 3rd (aHR 1.82, 95% CI 1.13–2.94) and 4th highest quartiles (aHR 1.79, 95% CI 1.12–2.86) of neighborhood poverty compared with the lowest quartile; and residence in neighborhood with 25%–49% (aHR 1.59, 95% CI 1.07–2.42) and ¥50% Latinos compared with \u3c25% Latinos (aHR 1.58, 95% CI 1.03–2.42). Significant racial disparities in HIV survival exist among Latinos. Differential access to—and quality of—care and perceived/experienced racial discrimination may be possible explanations

Approaches, methodologies, and teachers training activities

Enmarcado en una investigación sobre la formación continuada del profesorado de educación obligatoria en varias Comunidades Autónomas, este trabajo tiene su foco de análisis en las modalidades formativas (enfoques, metodologías, actividades) en que se articula la oferta de la formación docente y concretamente, en una cuestión principal: ¿qué características tipológicas presentan las actividades de formación continuada en las que participa el profesorado de Educación Secundaria Obligatoria? El análisis de los datos cuantitativos y cualitativos obtenidos respectivamente mediante cuestionario a profesores y entrevistas a gestores (administración, centros de formación) y receptores (centros docentes, profesores), muestra el predominio de modalidades de formación que pueden ser caracterizadas como de orientación consumista y de entrenamiento técnico individual, en particular, la modalidad de transferencia que constituyen los cursos y talleres. Estos resultados son interpretados a la luz de la literatura más reciente y refrendada sobre el desarrollo profesional de los profesores, lo que permite tomar en consideración ciertas conclusiones relativas a la calidad de las oportunidades de aprendizaje docenteWithin the framework of an investigation into the continuing education of teachers of Compulsory Education in several Autonomous Communities, this work focuses on the training modalities (approaches, methodologies, activities) in which the offer of teacher education is articulated and specifically in a main issue: what typological characteristics do the continuous training activities in which teachers of Compulsory Education participate? The analysis of the quantitative and qualitative data obtained by questionnaire to teachers and interviews with managers (administration, training centers) and recipients (teaching centers, teachers), respectively, shows the predominance of training modalities that can be characterized as consumer oriented and individual technical training, in particular the courses and workshops that constitute a transfer modality. These results are interpreted in the light of the most recent and endorsed literature on the professional development of teachers, which allows to take into account certain conclusions regarding the quality of teaching learning opportunitiesUniversidad de Granada. Departamento de Didáctica y Organización Escolar. Grupo FORCE (HUM386

Assessing the effectiveness of DTN techniques under realistic urban environments

© 2013 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works[EN] Intelligent Transportation Systems (ITS) require collecting and distributing as much relevant information as possible to provide their services. Such information could also offer new possibilities to various service providers in the wider Smart City context. The distribution of this intelligence is carried out through various vehicular networking strategies, the most flexible of all being Delay Tolerant Networking (DTN). DTN protocols can cope with the problems derived from high mobility and the possibility of high node sparsity. Nevertheless, achieving a fair comparison of DTN solutions in an urban environment is a hard task. In this paper we present a generic DTN model that we use to compare various representative DTN solutions in a metropolitan scenario. We highlight the weak and strong points of each evaluated proposal by also taking into consideration different sending strategies adopted to improve the performance of DTN protocols.This work was partially supported by the Ministerio de Econom´ıa y Competitividad, Spain, under Grants TIN2011-27543-C03-01 and BES-2012-052673 and by the Universitat Politecnica de Val ` encia through the ABATIS project (PAID- `05-12).Tornell, SM.; Tavares De Araujo Cesariny Calafate, CM.; Cano Escribá, JC.; Manzoni, P. (2013). Assessing the effectiveness of DTN techniques under realistic urban environments. En Local Computer Networks (LCN), 2013 IEEE 38th Conference on. IEEE. 573-580. https://doi.org/10.1109/LCN.2013.6761293S57358

VACaMobil: VANET Car Mobility Manager for OMNeT++

©2013 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.The performance of communication protocols in vehicular networks highly depends on the mobility pattern. Therefore, one of the most important issues when simulating this kind of protocols is how to properly model vehicular mobility. In this paper we present VACaMobil, a VANET Car Mobility Manager for the OMNeT++ simulator which allows researchers to completely define vehicular mobility by setting the desired average number of vehicles along with its upper and lower bounds. We compare VACaMobil against other common methods employed to generate vehicular mobility. Results clearly show the advantages of the VACaMobil tool when distributing vehicles in a real scenario, becoming one of the best mobility generators to evaluate the performance of different communication protocols and algorithms in VANET environments.This work was partially supported by the Ministerio de Economía y Competitividad, Spain, under Grants TIN2011-27543-C03-01 and BES-2012-052673, and by the Ministerio de Educación, Spain, under the FPU program, AP2010-4397, AP2009-2415.Báguena Albaladejo, M.; Tornell, SM.; Torres Cortés, Á.; Tavares De Araujo Cesariny Calafate, CM.; Cano Escribá, JC.; Manzoni, P. (2013). VACaMobil: VANET Car Mobility Manager for OMNeT++. IEEE. https://doi.org/10.1109/ICCW.2013.6649393

Near infrared high efficiency InAs/GaAsSb QDLEDs: band alignment and carrier recombination mechanisms

The development of high efficiency laser diodes (LD) and light emitting diodes (LED) covering the 1.0 to 1.55 μm region of the spectra using GaAs heteroepitaxy has been long pursued. Due to the lack of materials that can be grown lattice-macthed to GaAs with bandgaps in the 1.0 to 1.55 μm region, quantum wells (QW) or quantum dots (QD) need be used. The most successful approach with QWs has been to use InGaAs, but one needs to add another element, such as N, to be able to reach 1.3/1.5μm. Even though LDs have been successfully demonstrated with the QW approach, using N leads to problems with compositional homogeneity across the wafer, and limited efficiency due to strong non-radiative recombination. The alternative approach of using InAs QDs is an attractive option, but once again, to reach the longest wavelengths one needs very large QDs and control over the size distribution and band alignment. In this work we demonstrate InAs/GaAsSb QDLEDs with high efficiencies, emitting from 1.1 to 1.52 μm, and we analyze the band alignment and carrier loss mechanisms that result from the presence of Sb in the capping layer

Solar cycle variations in the ionosphere of Mars

Solar cycle variations in solar radiation create notable changes in the Martian ionosphere, which have been analysed with Mars Express plasma datasets in this paper. In general, lower densities and temperatures of the ionosphere are found during the low solar activity phase, while higher densities and temperatures are found during the high solar activity phase. In this paper, we assess the degree of influence of the long term solar flux variations in the ionosphere of Mars

Procesos de afrontamiento y ajuste a la enfermedad en pacientes con artritis reumatoide

The current paper explores the role played by coping strategies in Rheumatoid Arthritis (RA), a cronic desease related to high levels of pain, physical impairment and negative emotions. To carry out the research, it has been selected 89 sample of RA patients who have been evaluated with the following tools: Inventario de Valoración y Afrontamiento, IVA; Inventario de Situaciones y Respuestas de Ansiedad Breve, ISRA-B; Cuestionario de Tristeza Depresión, CTD; Inventario de Expresión de Ira Estado-Rasgo, STAXI-2; Frecuencia e Intensidad de Dolor, FID y Health Assessment Questionnaire, HAQ. Correlational analysis as well as regression analysis were carried out, in such way that the latter had coping strategies as the independent variables and desease adjustment as the dependent variables (negative emotions, pain and physical impairment). Results show significative and possitive correlations between two kinds of coping: passive and avoiding, and different adjustments measures (negative emotions, pain, and physical impairment). In regression analysis, those already mentioned coping ways (passive and avoiding) forecast higher levels of pain, physical impairment and negative emotion.El presente trabajo persigue la exploración del papel que juegan las estrategias de afrontamiento en los pacientes con Artritis Reumatoide, una enfermedad reumática crónica que cursa asociada a altos niveles de dolor, discapacidad y emocionalidad negativa. Para ello se ha tomado una muestra de 89 pacientes con Artritis Reumatoide, que han sido evaluados con los siguientes instrumentos: Inventario de Valoración y Afrontamiento, IVA; Inventario de Situaciones y Respuestas de Ansiedad Breve, ISRA-B; Cuestionario de Tristeza Depresión, CTD; Inventario de Expresión de Ira Estado-Rasgo, STAXI-2; Frecuencia e Intensidad de Dolor, FID y Health Assessment Questionnaire, HAQ. Se han llevado a cabo análisis correlacionales y análisis de regresión, tomando para estos últimos como variables independientes o predictoras las estrategias de afrontamiento ante el dolor y como variables dependientes aquellas que constituyen el llamado ajuste a la enfermedad: las emociones negativas, el dolor y la discapacidad. Los resultados muestran correlaciones positivas y significativas entre dos tipos de afrontamiento, el pasivo y el evitativo, y las distintas medidas de ajuste (emociones negativas, dolor y discapacidad). En los análisis de regresión, de nuevo son estas dos formas de afrontamiento, pasivo y evitativo, las que predicen mayores niveles de dolor, discapacidad y emocionalidad negativa