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Inteligentzia artifiziala eta big data, ikaskuntzaren pertsonalizaziorako gakoak
Full text linkEgungo ikasleek beren ibilbide akademikoan jarraitzeko hautaketan hainbat zailtasun izaten dituzte
(Pérez eta Aldas, 2019). Hori dela eta, ikasleen orientazioan laguntza eskaintzea nahi izan da ikerketa
honetan, ikaskuntza pertsonalizatuan oinarrituz. Horrela, ikasleen konpetentziak eta interesak
identifikatu eta horiek lan-adarreko konpetentziekin uztartzeko ikerketa egin da. Inteligentzia
Artifizialaren (IA aurrerantzean) eta Big Dataren bidez, etorkizunean ikasleei orientaziorako datu
gehigarriak ematea eta ibilbide pertsonalizatuak sortzea da proiektuaren helburu nagusia.Nowadays, students present difficulties in choosing to continue their academic career (Pérez and
Aldas, 2019). Therefore, in this study it was wanted to take steps that will help to fill the gap of
orientation in the choice of a university degree. Thus, a research has been conducted to identify the
skills and interests of students and reconcile them with the skills of the labor branch. Through Artificial
Intelligence and Big Data, the final objective of the project is to provide students with additional
orientation data in the future and to create personalized itineraries
Experimental investigation of contact forces and temperatures in rubbing interactions of honeycomb interstate seals
Full text linkThe new architecture of high velocity aircraft engines includes labyrinth-honeycomb interstate seals to improve the engine’s stability. To increase these engines capacity a commonly used strategy is to reduce the clearance between the blades and the sealing system. However, this reduction causes non-desired contacts (rubbing) between the rotating and static components of the engine. This rubbing interaction has an adverse effect on the engine life (wear and thermal cracking) and efficiency. In this work, experimental tests were carried out to recreate the rub between an F110 steel fin and a Hastelloy X honeycomb seal. A conventional CNC machine controlled the sliding and penetration velocities, and the interaction forces and fin tip temperatures were measured during the rub. Results demonstrate the dependence that both, interaction forces and tip temperatures, have with sliding and penetration velocities. However, it is clear that this influence is more pronounced in relation to the sliding velocity
Kooperatibismoaren hariak belaunaldi berrietan
Full text linkTestuinguru soziolaboral ziurgabe eta aldakorrean Arrasateko Kooperatiba Esperientziak oraindik
ere ekoizpen eta enpresa antolaketa eredu alternatibo izaten jarraitzen du. Ordea, modernitatearen
alaba zuzena izanik, kooperatibagintza eraiki eta bultzatu zuten belaunaldien eta orain lanera sartzen
ari direnen artean ezberdintasun soziologiko nabarmenak daude, mundu ikuskera, identitate eraikuntza
eta esanahi sozialen aldetik. Ikerketa honetan kooperatibismoaren transmisioa zein modutan gauzatzen
den ikertu dugu, gazte belaunaldietan nagusitzen diren definizio sozialak identifikatuz eta
kooperatibismoak epe ertainean iraungo badu, transmisioaren aldetik dituen erronka estrategikoak
seinalatuzIn a precarious socio-labor reality, The Mondragon Cooperative Experience remains as an
organizational and mode of production alternative. However, there are so many sociological
differences between the first generation of cooperative members and the young generations coming to
work. Cultural values, identification processes and social meanings of the Cooperative Model are
changing. In this research, we investigate the way of cooperativism transmission is happening in
young generations, pointing out the social definitions of cooperativism and its strategic challenges
Diversidad de origen y socioeconómica en una escuela de Gipuzkoa: diálogo con las familias
Full text linkEl artículo presenta una investigación realizada
en una escuela de Gipuzkoa con
alta diversidad socioeconómica, de origen
y lingüística. Sus objetivos han sido describir,
analizar e interpretar las percepciones
de las familias sobre dicha diversidad en
su propio centro. Se han realizado entrevistas
semiestructuradas a familias de
distinto origen y analizado los datos mediante
el análisis de contenido. Sus voces
permiten conocer algunos retos importantes
en las relaciones entre las familias y
en la calidad educativa de la escuela. Se
concluye que el diálogo, el mutuo conocimiento
y la educación ética son temas
pendientes en la escuela y la sociedad.This article reports on research carried
out in a school in Gipuzkoa which is
highly diverse socio-economically, linguistically,
and in the origin of its pupils.
The objectives were to describe, analyze
and interpret the perceptions of families
about such diversity in their own center.
Semi-structured interviews with families
of different origin were conducted and
the data analyzed using content analysis.
Their voices express some important challenges
both in the relationships between
the families and in the educational quality
of the school. It is concluded that dialogue,
mutual knowledge and ethical education
are pending issues at school and in society
Fuzzing the Internet of Things: A Review on the Techniques and Challenges for Efficient Vulnerability Discovery in Embedded Systems
Full text linkWith a growing number of embedded devices that create, transform and send data autonomously at its core, the Internet-of-Things (IoT) is a reality in different sectors such as manufacturing, healthcare or transportation. With this expansion, the IoT is becoming more present in critical environments, where security is paramount. Infamous attacks such as Mirai have shown the insecurity of the devices that power the IoT, as well as the potential of such large-scale attacks. Therefore, it is important to secure these embedded systems that form the backbone of the IoT. However, the particular nature of these devices and their resource constraints mean that the most cost-effective manner of securing these devices is to secure them before they are deployed, by minimizing the number of vulnerabilities they ship. To this end, fuzzing has proved itself as a valuable technique for automated vulnerability finding, where specially crafted inputs are fed to programs in order to trigger vulnerabilities and crash the system. In this survey, we link the world of embedded IoT devices and fuzzing. For this end, we list the particularities of the embedded world as far as security is concerned, we perform a literature review on fuzzing techniques
and proposals, studying their applicability to embedded IoT devices and, finally, we present future research directions by pointing out the gaps identified in the review
Reactive control of wave energy devices – the modelling paradox
Full text linkThe implementation of energy maximising control systems (EMCSs) in wave energy converter (WEC) devices is an important step towards commercially viable operation of WECs. During the design stage of such EMCSs, linear hydrodynamic models are commonly used and are, in fact, the most viable option due to the real–time computational requirements of optimisation routines associated with energy-maximising optimal control techniques. However, the objective function of EMCSs, i.e. maximising the generated power by exaggerating WEC motion, inherently violates the underlying assumption of the linear hydrodynamic control design models, i.e. small amplitude device motion (compared to the device dimensions). Consequently, the linear models, used as a basis for EMCSs, in fact conspire to violate the very assumption upon which they were built - hence leading to a modelling paradox. It is important to evaluate WEC controllers in realistic physical or numerical environments, to gain knowledge of the disparity between the performance prediction from the EMCS design and performance evaluation models. This paper presents a comprehensive assessment of the performance prediction by a linear and non–linear hydrodynamic model of three different EMCSs, implemented in two different WEC structures, in an attempt to quantify the severity of this modelling disparity, or paradox
The Positive Loop at Work: A Longitudinal Long-Term Study of Transformational Leadership, Group Passion, and Employee Result
Full text linkPositive psychology and positive organizational behavior studies recognize that leadership is extremely important for generating positive well-being. Despite the frequently reported significant positive correlations, the causal long-term relationship between leadership, positive high intense affect, and employee results remains unclear. The main objective of this study was to analyze the long-term (longitudinal) relation of transformational leadership and positive high-intensity emotions with employee groupsatisfaction, commitment, and proactive behavior. We built a longitudinal structural equation model to test a mediation model with two time points; 2,480 workers from 166 work units completed questionnaires at both time points. Our results reveal that positive high-intensity emotions mediate the relation between transformational leadership and proactive behavior of workers, the bidirectional relations between the variables were also analyzed. The present study is, to our knowledge, the first analyzing the long-term effect of TFL and collective high-intensity emotions on worker’s results longitudinally. Our findings reflect the great complexity of affect and affect-related results in organizations and highlight the need for more longitudinal research to clarify emotional processes at work
Collective experience of application of an inverted classroom in the computer science degree program
Full text linkIn the last years, higher education is immersed in the transformation of the teaching experience with the aim of involving students more, as well as motivating them. Nowadays, students are very familiarized with new technologies and media while lecturers have been forced to transform their traditional notes to digital ones. This transformation pace has been accelerated in the last year due to the COVID19 pandemic. One of the main exponents of the said transformation is the adoption of the inverted classroom, a substantially studied teaching methodology where students work on some key concepts before a lecture takes place and face-to-face lecture time is reserved for added value activities. This work presents the results of a case study involving the implementation of the inverted classroom in a computer engineering bachelor’s degree. This experiment involves six different subjects in three courses during the 2020/21 academic year. The paper presents the principal motivation for the study, as well as the preparation process and methodology of the out-of-classroom multimedia materials and training of the faculty. It also covers the methodology used for multimedia content creation. Finally, the evaluation results are presented, gathered from questionnaires directed to students and lecturers
Application Dependent End-of-Life Threshold Definition Methodology for Batteries in Electric Vehicles
Full text linkThe end-of-life event of the battery system of an electric vehicle is defined by a fixed end-oflife threshold value. However, this kind of end-of-life threshold does not capture the application and battery characteristics and, consequently, it has a low accuracy in describing the real end-of-life event. This paper proposes a systematic methodology to determine the end-of-life threshold that describes accurately the end-of-life event. The proposed methodology can be divided into three phases. In
the first phase, the health indicators that represent the aging behavior of the battery are defined. In the second phase, the application specifications and battery characteristics are evaluated to generate the end-of-life criteria. Finally, in the third phase, the simulation environment used to calculate the end-of-life threshold is designed. In this third phase, the electric-thermal behavior of the battery at different aging conditions is simulated using an electro-thermal equivalent circuit model. The proposed methodology is applied to a high-energy electric vehicle application and to a high-power electric vehicle application. The stated hypotheses and the calculated end-of-life threshold of the high-energy application are empirically validated. The study shows that commonly assumed 80 or 70% EOL thresholds could lead to mayor under or over lifespan estimations
Critical analysis of standards for accessible design of consumer products
Full text linkThe world's population is aging. In turn, the older we get, the greater the risk of disability due to the decline in physical, sensory and cognitive abilities. In addition, aging is a factor that directly influences people's independence. Thus, it is essential to think about the design of accessible products that facilitate the development of day-to-day activities to promote people's independence. Therefore, the objective of this communication is to identify the current standards for accessible design and to analyze the scope of each of them in terms of accessible design requirements to respond to sensory disabilities (visual, hearing, etc.), physical disabilities (dexterity, mobility, etc.) and cognitive disabilities (intellect, memory, literacy, etc.). Thus, the accessibility regulations are identified and analyzed in terms of the capabilities they affect. As a result of the study, a critical analysis of the standards is made and their strengths and weaknesses are identified as tools for the accessible design of consumer products.La población mundial tiende al envejecimiento. A su vez, a mayor edad es mayor el riesgo de discapacidad debido a la merma de las capacidades físicas, sensoriales y cognitivas. A su vez, el envejecimiento es un factor que influye directamente en la independencia de las personas. Así, resulta imprescindible pensar en el diseño de productos accesibles que faciliten el desarrollo de las actividades del día a día para promover la independencia de las personas. Por ello, el objetivo de esta comunicación es identificar las normas vigentes en cuanto a diseño accesible y analizar el alcance que tiene cada una de ellas en cuanto a requisitos de diseño accesible para dar respuesta a discapacidades sensoriales (visuales, auditivas, etc.), físicas (de destreza, de movilidad, etc.) y cognitivas (intelecto, memoria, alfabetización, etc.). Así, en primer lugar, se identifican las normativas relativas a la accesibilidad para, después, analizarlas en base a las capacidades en las que inciden. Como resultado del estudio, se realiza un análisis crítico de las normas y se identifican los puntos fuertes y débiles de las mismas como herramientas para el diseño accesible de productos de consumo