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La voz de la experiencia, nº 1 (diciembre 2022)
No full textLa realización de este proyecto ha sido posible gracias a la financiación obtenida en la IV CONVOCATORIA DE PROYECTOS DE INNOVACIÓN DOCENTE Y TRANSFORMACIÓN SOCIAL EN APRENDIZAJE Y SERVICIO (ApS) para el curso académico 2022- 2023 del Vicerrectorado de Internacionalización y Cooperación
Intellectual engagements of accounting academics: The ‘forecasted losses' intervention
Get PDFThis paper explores the social and political potential of accounting scholarship, presenting and discussing an intellectual intervention challenging a legislative reform that significantly affected Spanish industrial relations. In this reform, an accounting artifact (forecasted losses) played an unexpected role and was misrepresented, prompting a sizeable number of scholars to sign two manifestos in 2010 and 2012 against the use of forecasted losses made by the new legislation. As promoters of this manifesto, we perform in this paper a collaborative autoethnography to reflect on the context, events, reactions, and significance of this intervention for both the academic and the industrial relations fields. We mobilize Pierre Bourdieu’s ideas on the public intellectual to think more generally about academic engagements in the interplay between accounting, policymaking, and social issues. This intervention illustrates the different manners in which administrative and economic powers interfered in the Spanish accounting academic field, limiting the disposition of Spanish scholars to engage in public debates. We also interpret our engagement as mobilizing intellectual capital to expose how the notion of forecasted losses was used to produce a form of symbolic violence and how this capital is more effective as it produces messages addressed to the producers, i.e., policymakers and the judicature in this specific case.Ministerio de Economía y Competitividad, FEDER and Consejería de Educación, Junta de Castilla y León (Grants RTI2018-099920-B-I00 and BU058P17)
Metal-free organic polymer for the preparation of a reusable antimicrobial material with real-life application as an absorbent food pad
Get PDFThere is a strong need to reduce food waste while maintaining the quality of packaged food. Thus, we have
prepared a new fully organic and metal-free antimicrobial polymer, with the aim of increasing both the shelf life
and safety of packaged meat. This antimicrobial polymer is based on widely available commercial acrylic
monomers with covalently linked vanillin motifs, which are naturally occurring essential oils with antimicrobial
characteristics. The film-shaped antibacterial polymeric material shows antibacterial activity for Escherichia coli,
Staphylococcus aureus, and Listeria monocytogenes with an R parameter of up to 3.18, 3.37 and 2.00 and inhibition
% of up to 99.95%, 99.96%, and 99.02%, respectively. To show the potential of these materials, we conducted a
proof of concept experiment in which the antimicrobial polymer film was used as an absorbent food pad. The
results show that the use of the antimicrobial polymer film can increase the shelf life of a packaged meat product
by 50%. Since the antimicrobial activity is based on a covalently anchored group, there is no antimicrobial agent
diffusion, and the antimicrobial activity persists beyond the first use because it is easily washable and reusable
for at least 10 cycles.We gratefully acknowledge the financial support provided by FEDER (Fondo Europeo de Desarrollo Regional), the Spanish Agencia Estatal de Investigacion ´ (PID2020–113264RB-I00/AEI/10.13039/50110001 1033) and "La Caixa" Foundation (the project leading to these results has received funding from the "La Caixa" Foundation, under agreement LCF/ PR/PR18/51130007)
Valorization of brewer’s spent grain by consecutive supercritical carbon dioxide extraction and enzymatic hydrolysis
Get PDFThe double effect of supercritical carbon dioxide, sc-CO2, in a biorefinery concept applied to brewer’s spent grain
(BSG) was assessed in this work. Extraction conditions to remove and valorize the lipophilic fraction were
studied (20–40 MPa and 40–80 ◦C) obtaining a maximum yield of 5.70 ± 0.07 g/100 gBSG at 80 ◦C and 40 MPa.
High pressures and temperatures resulted in higher content of total phenolic and flavonoid compounds, as well as
higher antioxidant capacity. It was observed an improvement of the enzymatic hydrolysis yield by cellulase in
the sc-CO2 treated BSG compared to the non-treated. This improvement could be partially attributed to the
removal of the lipid fraction and to morphological changes of BSG after sc-CO2. Based on this double benefit, scCO2 can play an important role on biomass valorization.This work was supported by the Agencia Estatal de Investigación [grant number PID2019-104950RB-I00 / AEI / https://doi.org/10.130 39/501100011033] and the Junta de Castilla y León (JCyL) and the European Regional Development Fund (ERDF) [grant numbers BU301P18 and BU050P20]. E. Trigueros and P. Alonso-Riano ˜ predoctoral contracts were funded by JCyL and the European Social Fund (ESF) by ORDEN EDU/574/2018, de 28 de mayo and ORDEN EDU/556/2019, de 5 de junio, respectively
Effect of HIP post-processing at 850 °C/200 MPa in the fatigue behavior of Ti-6Al-4V alloy fabricated by Selective Laser Melting
Get PDFHot Isostatic Pressing (HIP) is a thermomechanical post-processing technique widely used in Additive
Manufacturing parts to reduce internal defects, such as entrapped-gas-pores or lack-of-fusion, which have a great
influence on the mechanical and fatigue properties of the material. In this paper, the effect of a non-conventional
HIP-cycle on the fatigue behavior of a Ti-6Al-4V alloy manufactured by Selective Laser melting (SLM) is studied.
The HIP-cycle examined in this study is carried out at pressure of 200 MPa and a temperature of 850 ◦C for 2 h.
Moreover, the cooling process is faster than that obtained from conventional furnace cooling rates, with the aim
to limit the microstructural coarsening effects that affect the fatigue behavior. For the study, an extensive
experimental fatigue program was carried out which included a first batch of SLM specimens tested under as-built
conditions, a second batch of SLM specimens subjected to the present HIP process, and a third batch of specimens
of a reference wrought processed material obtained by rolling and annealing processes. The microstructure of the
material, before and after HIPping, is analyzed and a fractographic analysis is carried out to study the mechanism
of crack initiation and its relation to the fatigue behavior. The results show that the present HIP-process allows
for very good material densification, a microstructure that shows minimal coarsening effects, and good fatigue
properties comparable to the conventional wrought processed material.The authors gratefully acknowledge financial support from the Junta de Castilla y León (Spain) through grant BU-002-P20, co-financed by FEDER funds
High voltage atmospheric cold plasma decontamination of Salmonella enteritidis on chicken eggs
Get PDFSalmonella enteritidis (SE) accounts for more than 70% of Salmonella spp. infections in humans with a primary
source being chicken eggs, that can result from post-lay SE cross-contamination of the shell from contaminated
equipment or the environment. The objective of this study was to apply a HVACP treatment that can achieve a
minimum 5-log reduction in SE on the surface of artificially inoculated shell eggs with an initial bacterial load of
108 CFU/egg, after a previous disinfection. Optimized HVACP treatment conditions were an indirect treatment
with air at 60% humidity at 100 kV for one minute treatment and six hours post-treatment or alternatively, five
minutes of treatment and four hours post-treatment. Egg quality parameters of Haugh unit (HU), pH, color, and
vitelline membrane and shell strength were tested under the optimized conditions and showed no significant
difference (p > 0.05) between treated and untreated eggs.
Industrial relevance: Missing information for a possible scale up of a cold plasma system for egg surface
decontamination has been addressed by an optimization of HVACP treatment focused on treatment and posttreatment time, essential parameters to have into account in the food industry. These results demonstrate that
HVACP is an effective decontamination method for SE on chicken shell eggs and provides a baseline for a future
scale up of the process, showing that different combinations of treatment variables can achieve the desired
decontamination without affecting to key quality parameters of the egg such as Haugh Unit or vitelline membrane strength.This work was supported by Ontario Ministry of Agriculture, Food and Rural Affairs (OMAFRA), and the Barrett Family Foundation Chair in Sustainable Food Engineering
Microstructure and Dimensional Stability of Slag-Based High-Workability Concrete with Steelmaking Slag Aggregate and Fibers
Get PDFFour high-workability (pumpable and self-compacting) concretemix designs are presented that incorporate steelmaking slagswith additions of both metallic and polymeric fibers. Electric arcfurnace slag (EAFS) as aggregate, and ladle furnace slag (LFS) andground granulated blast furnace slag (GGBFS) as supplementary cementitious material (SCM) are applied to optimize the sustainability ofthe mix design. The main variables in the microstructural analysis, theporosity and the pore structure of the hardened mixes, were assessedwith mercury intrusion porosimetry (MIP), X-ray computed tomography (XCT) and water capillary penetration analysis. Moreover,shrinkage was observed to decrease when adding metallic fibers and LFS. In general, scanning electron microscopy (SEM) observationsrevealed good quality concrete microstructures. Accelerated aging tests at a moderate temperature (72°C) produced a slight lengthening,which affected the dimensional stability of all the mixtures, which was also conditioned by their micro-porosity. The internal damageinduced by this test decreased the brittle fracture strength of the concrete mixes, although the use of GGBFS and LFS moderated thatdamage, due to the increased compliance of the cementitious matrix.The authors wish to express their gratitude for funding this researchwork to the Spanish Ministry of Universities, MInisterio de Cienciae INNovaci ́on (MICINN), Agencia Estatal de Investigaci ́on (AEI),European Union (EU), and European Regional Development Fund(ERDF) (PID2020-113837RB-I00, PID2021-124203OB-I00,RTI2018-097079-B-C31, 10.13039/501100011033, FPU17/03374);ERDF and the Junta de Castilla y Le ́on (BU119P17; UIC-231);European Social Fund (ESF) and Youth Employment Initiative(JCyL) (UBU05B_1274); Sustainable And Resilient ENvironment(SAREN) research group (IT1619-22, the Basque Government);and the University of Burgos [Y135.GI]. Our thanks also go to thecompanies Chryso Additives and Hormor-Zestoa for their ongoingcollaboration with research group members
Non-destructive density-corrected estimation of the elastic modulus of slag-cement self-compacting concrete containing recycled aggregate
Get PDFNon-destructive tests that cause no damage to concrete components can be used in rehabilitation works to
determine concrete mechanical properties, such as the modulus of elasticity. In this paper, models are presented
to predict the modulus of elasticity of Self-Compacting Concrete (SCC) with Recycled Aggregate (RA) and slag
cement through the hammer rebound index and ultrasonic pulse velocity. Simple- and multiple-regression
models were developed to estimate the modulus of elasticity according to the monotonic relation between
variables shown by Spearman correlations. In these models, the modulus of elasticity was always inversely
proportional to the square root of the non-destructive property under consideration, and the hardened density
raised to the power of 2.5 as correction factor always increased estimation accuracy and robustness. The
multiple-regression model with density correction yielded the most precise estimations of the elastic modulus
with deviations below ±10% and ±20% in 82% and 94% of cases, respectively.This research work was supported by the Spanish Ministry of Universities, MICINN, AEI, EU, ERDF and NextGenerationEU/PRTR [grant numbers PID2020-113837RB-I00; 10.13039/501100011033; TED2021-129715B–I00; FPU17/03374]; the Junta de Castilla y León (Regional Government) and ERDF [grant number UIC-231]; and, finally, the University of Burgos [grant number SUCONS, Y135.GI]
The politics that we play. Culture, videogames and political ludofiction on Steam
No full textEsta investigación parte de la reconocida influencia de los medios de comunicación en la esfera y el discurso político, así como de la popularidad de la plataforma Steam en la distribución de videojuegos para ordenador. De este modo, se propone un análisis de los rasgos del discurso de las fichas de los juegos de contenido político en este medio de distribución de contenidos. La selección de la muestra parte de una serie de palabras clave (Politics, Political y Political Sim) para identificar un conjunto representativo de juegos (n=64) que desarrollan algún aspecto de la política contemporánea (representaciones, ideologías o modelos de gobierno). Para ello, se combina el análisis de contenido cuantitativo y cualitativo de los paratextos de estos juegos (concretamente, los contenidos presentes en la ficha de cada uno de ellos). La exploración de estos contenidos destaca una lectura de la actividad política de corte pragmático y normativo, influido por su contexto de producción y ciertos vectores ideológicos del escenario contemporáneo como la ideología neoliberal.This research is based on the well-known influence of the media in the political sphere and discourse, as well as the popularity of the Steam platform in the distribution of computer video games. In this way, we propose an analysis of the message of the game cards of games with political content in this medium of content distribution. The selection of the sample is based on a series of keywords (Politics, Political and Political Sim) to identify a representative set of games (n=64) that develop some aspect of contemporary politics (representations, ideologies or models of government). To do so, we combine quantitative and qualitative content analysis of the paratexts of these games (specifically, the contents present in the game card of each of them). The exploration of these contents highlights a pragmatic and normative reading of political activity, influenced by its context of production and certain ideological vectors of the contemporary scene, such as neoliberal ideology.Los resultados de este trabajo se enmarcan en el proyecto I+D+i «Politainment ante la fragmentación mediática: desintermediación, engagement y polarización» (PID2020-114193RB-I00) financiado por el Ministerio de Economía y Competitividad
Design of a document management system for a chemical plant
Get PDFEn este trabajo de fin de grado se lleva a cabo el diseño de un sistema de gestión
documental adaptado a las necesidades de la empresa Adisseo Burgos. Para ello se usa
como guía la norma UNE-ISO/TR 15489-2:2006 y otras normas relacionadas con la
gestión documental.
En la primera parte del trabajo se ha analizado la empresa y sus actividades, y se han
creado herramientas documentales de acuerdo con las necesidades de la misma, como
es un cuadro de clasificación documental, una tabla de análisis de riesgos y una tabla
de acceso y seguridad documental, con el objetivo de complementar el diseño
conceptual del sistema de gestión documental.
En la segunda parte del trabajo se han estimado las actividades necesarias para la
realización del proyecto de diseño e implementación del sistema de gestión
documental, junto con su coste y duración. Se ha llevado a cabo un análisis financiero
del mismo para ver su viabilidad y finalmente se han mostrado factores claves útiles
en caso de realizarse el proyecto.In this end-of-degree project, the design of a document management system adapted
to the needs of the company Adisseo Burgos is carried out. For this purpose, the UNEISO/TR 15489-2:2006 standard and other standards related to document management
are used as a guide.
In the first part of the thesis, the company and its activities have been analyzed, and
documentary tools have been created according to its needs, such as a document
classification scheme, a risk evaluation table and an access and security chart, in order
to complement the conceptual design of the document management system.
In the second part of the work, the activities necessary to carry out the project of design
and implementation of the document management system have been estimated, along
with their cost and duration. A financial analysis of the project has been carried out to
see its viability and finally, useful key factors have been pointed out in case the project
is approved and carried out