748 research outputs found
Sort by
Service design visualization tools for supporting servitization in a machine tool manufacturer
No full textLow Cost Photonic Sensor for in-Line Oil Quality Monitoring: Methodological Development Process towards Uncertainty Mitigation
Get PDFLubricant and hydraulic fluid ageing impacts the performance of the machines, gears, transmissions or automatisms where they are being used. This manuscript describes the work accomplished for bringing an innovative measurement concept for analysing the physical- chemical properties of these fluids, to a real industrial product ready to be integrated into different industrial equipment. The steps taken to deal with uncertainties and evolving requirements while progressing in the sensor development are described, covering the stages of theoretical formulation of the problem, optical and fluidic simulations, sensor prototype development and tests. The sensor working principle is based on a combination of transmittance and diffuse reflectance photonic inspection of the fluid sample that is collected in a microcavity through a standard hydraulic fitting. Photonics, electronics, micro-mechanics, fluidics, data processing and analysis has been merged with a deep knowledge in the lubricant degradation process to develop a sensor solution that is able to measure the Oil Degradation Index, Oil Oxidation, Acid Number, Ruler and Membrane Patch Colorimetry data from an inservice lubricating oil sample. The photonic micro sensor presented here offers a powerful tool that operates directly immersed in the fluid, at an economic cost and compacted size for inline oil degradation monitoring
Relación directa y mediadora de las TIC sobre el rendimiento de la diversificación empresarial
Get PDFEl presente estudio analiza el impacto que ejerce el uso de las tecnologías de información y comunicación (TIC) sobre la diversificación y el rendimiento empresarial de las pequeñas y medianas empresas (pymes). A partir de una muestra de 95 empresas de la comunidad autónoma del País Vasco, se evidencia que las empresas diversificadas muestran un mayor nivel de uso de las TIC y que este recurso afecta positivamente el rendimiento financiero y no financiero de la empresa. Los análisis muestran también que las TIC son una variable mediadora entre el tipo de diversificación y el rendimiento de
los negocios en los cuales ha entrado la empresa. Para el análisis estadístico descriptivo y correlacional de las variables, se utilizó el software IBM SPSS en su versión 21. Entre los futuros trabajos que pueden derivarse de este, está el de aplicar el modelo a diferentes industrias con la idea de comparar los resultados encontrados y definir estrategias específicas
Barne-komunikazioa kooperatibetan: entzunak sentitzen dira langileak? Kasu-azterketa MONDRAGONen
Get PDFBarne-komunikazioa erabakigarria da arrakastadun erakundeetan; izan ere, eragiten du, besteak beste, langileen motibazioan, parte-hartzean eta produktibitatean. Halere, kontuan izan behar dugu barne-komunikazioaren praktika eraginkorrak eskatzen duela informatzeaz gain, entzutea. Hain zuzen ere, artikulu honen helburua da jakitea entzunak sentitzen ote diren kooperatibetako langileak. Era berean, eta ezberdintasunik dagoen jakite aldera, pertzepzio horiek guztiak ikertu dira kontuan izanik honako aldagai hauek: organoetako partaide izan ala ez, eskulan mota, lan-egoera eta egoitza. Horretarako, MONDRAGONeko kooperatiba bateko 224 langilek betetako galdetegiaz gain, zortzi elkarrizketa erdi egituratu egin dira. Jasotako datuek aditzera ematen dutenaren arabera, langileen pertzepzio orokorra da gutxi entzunak direla haien kezkak eta itxaropenak. Halere, entzuna sentitzeko pertzepzioan ematen dira ezberdintasun estatistiko esanguratsuak hainbat aldagaitan.Internal communication is crucial in successful organizations; indeed, it affects employee motivation, participation, and productivity, among other things. Nevertheless, we must
bear in mind that the effective practice of internal communication requires not only informing
employees, but also listening to them. Specifically, the purpose of this study was to determine
whether employees in cooperatives feel heard. Furthermore, in order to determine whether
differences exist, all of these perceptions were examined taking the following variables into
consideration: council membership, type of manual labor, work status, and place of work. In
addition to a questionnaire completed by 224 employees of a MONDRAGON cooperative
a total of 8 semi-structured interviews were also carried out. According to our results, the
general perception of the employees is that their concerns and expectations are little heard.
However, with respect to the perception of feeling heard, statistically significant differences
were found in several variables
¿En el proceso de aprendizaje, qué elementos favorecen el desarrollo de la competencia aprender a aprender? : Construcción de una escala para el profesorado universitario
No full textEn el marco actual de la docencia universitaria, contar con instrumentos científicos de medida de los contextos facilitadores de enseñanza-aprendizaje en el desarrollo de la competencia de aprender a aprender es de vital importancia. En este trabajo se presenta el proceso seguido en la construcción de los ítems y la dimensionalidad de un instrumento de nueva creación. Se han utilizado diferentes técnicas siguiendo los estándares internacionales que rigen la creación de pruebas psicométricas.In the current context of university teaching, counting on measuring instruments to assess teaching-learning facilitating contexts in the development of learning to learn competence is very important. This work contains the procedure followed to elaborate the items for a newly created instrument. We used different methods according to the international standards that rule the establishment of psychometric tests
Performance and internationalization effects of the use of ICT in diversified companies
Get PDFThe relationship between Information and Communication Technologies (ICT) and business performance has been a topic of great importance for academics from different areas for several decades. In this sense, this study analyzes the impact of the use of ICT on the diversification strategy of small and medium enterprises (SMEs). From a sample of 95 companies in the Autonomous Community of the Basque Country, it is evident that diversified companies show a higher level of use of ICTs and that this resource affects positively the degree of international diversification and business performance. For the descriptive and correlational statistical analysis of the variables, the SPSS software version 21 was used.La relación entre las Tecnologías de la Información y la Comunicación (TIC) y el rendimiento empresarial ha sido un tema de gran importancia para los académicos de diferentes áreas durante varias décadas. En este sentido, este estudio analiza el impacto del uso de las TIC en la estrategia de diversificación de las pequeñas y medianas empresas (PYME). De una muestra de 95 empresas de la Comunidad Autónoma del País Vasco, es evidente que las empresas diversificadas muestran un mayor nivel de uso de las TIC y que este recurso afecta positivamente el grado de diversificación internacional y el rendimiento empresarial. Para el análisis estadístico descriptivo y correlacional de las variables, se utilizó el software SPSS
Simple voltage balancing method to protect series-connected devices experimentally verified in a 5L-MPC converter
Get PDFThis paper presents a solution for the voltage balance problem of the series-connected devices that can be applied to multilevel converters in which the series-connected devices need to block twice their switched voltage. The solution is based on two ideas, the control of the switching commands to achieve proper switching losses balance and the use of additional circuitry to achieve proper voltage balance during their blocking state. The proposed strategy is experimentally validated into a 5-level multipoint clamped full-scale converter. However, it can be used in any other converter topology in which the devices need to block twice their switched voltage
Understanding human response to tactile stimuli: A Machine Learning approach
Get PDFWhereas understanding human reaction to touch is of great interest in many medical applications, it is still a very unknown field. This research aims to clarify the nature of the relation between endogenous and exogenous attention by analysing electroencephalografic (EEG) data regarding human touch. To this end, data collected from twelve subjects under an experiment based on a variation of the Posner’s cue-target paradigm has been used. After pre-processing, several multi-class classification models based on state-of-the-art machine learning algorithms have been implemented and their accuracy in detecting different experimental conditions have been evaluated. A temporal analysis has also been performed to select the most representative time points. Results showed that although the physical stimuli was identical across conditions, different types of attentional scenarios were classified above chance. Further, the hemisphere contralateral and ipsilateral to the attended side contributed differently, across time, to the accuracy of classification
Digital Interferometry Applied to Thermogravitational Technique
Get PDFIn this work, we have applied Optical Digital Interferometry approach to thermogravitational micro-column technique. By the new analysis, we examine the entire height of the micro-column and determine the complete concentration profile inside. The measurements were carried out by two lasers with different wavelength λ = 633nm and λ = 470nm. The system was validated with binary subsystems of the THN-IBB-C12 ternary mixture at equal mass fractions. The results were compared with values of Benchmark Fontainebleau and they showed an excellent agreement
Surface machining condition and fatigue life on Inconel 718
Get PDFLife assessment of components working in aero-engines at elevated temperatures is critical. Machining has a serious effect on these nickel-based alloys, for example in turbine discs, affecting their life in service. Machining (turning, broaching…) modifies surface roughness, thickness of the affected substrate layer (including the effect of possible broken carbides) and residual stress distribution near the component surface. On top of that, it is possible to shot-peen or not the component, which again modifies its surface integrity. The aim of this work is to discern among the effect of the different parameter: roughness, damage and residual stresses on fatigue performance and optimum machining conditions