Search results for "lcsh:Technology"
showing 10 items of 550 documents
On Thermoeconomic Diagnosis of a Fouled Direct Expansion Coil: Effects of Induced Malfunctions on Quantitative Performance of the Diagnostic Technique
2017
Thermoeconomic diagnosis represents a promising technique for the detection of common faults in refrigeration systems, which are responsible of degradation in their energetic performance. Recently, the authors have carried out a sensitivity analysis of the performance of this method to the thermodynamic conditions of inlet air and to the geometry of the direct expansion coil, in case of degradation induced by evaporator fouling. The analysis showed that the method is able to detect this fault, but sometimes its quantitative assessments are not satisfactory. In order to understand more in-depth the origin of such results and identify margins for refinement of the technique, this paper is aim…
CO2LD: An innovation educational project for High Degree Professional Training in Refrigeration
2013
EN] Refrigeration is one of the technology sectors that has sufered the most changes in the last twenty years, because of the negative impact of the fuids used in the refrigeration cycles, i.e., refrigerants, due to their impact on the ozone layer and their contribution to global warming. As a result of their negative efects, the European Union has established several directives to restrict the use of refrigerant fuids, and the sector therefore needs to adapt to the new regulations. This process of adaptation of the refrigeration sector to the new regulations must be carried out by all the agents involved, including those engaged in the training and education of the future refrigeration tec…
Optimization of photovoltaic energy production through an efficient switching matrix
2013
This work presents a preliminary study on the implementation of a new system for power output maximization of photovoltaic generators under non-homogeneous conditions. The study evaluates the performance of an efficient switching matrix and the relevant automatic reconfiguration control algorithms. The switching matrix is installed between the PV generator and the inverter, allowing a large number of possible module configurations. PV generator, switching matrix and the intelligent controller have been simulated in Simulink. The proposed reconfiguration system improved the energy extracted by the PV generator under non-uniform solar irradiation conditions. Short calculation times of the pro…
Composite Material Recycling Technology—State-of-the-Art and Sustainable Development for the 2020s
2021
Recently, significant events took place that added immensely to the sociotechnical pressure for developing sustainable composite recycling solutions, namely (1) a ban on composite landfilling in Germany in 2009, (2) the first major wave of composite wind turbines reaching their End-of-Life (EoL) and being decommissioned in 2019–2020, (3) the acceleration of aircraft decommissioning due to the COVID-19 pandemic, and (4) the increase of composites in mass production cars, thanks to the development of high volume technologies based on thermoplastic composites. Such sociotechnical pressure will only grow in the upcoming decade of 2020s as other countries are to follow Germany by limiting and ba…
Drifting Down the Technologization of Life: Could Choreography-Based Interaction Design Support us in Engaging with the World and our Embodied Living?
2013
The development of interactive technology is often based on the assumption of need to reduce the physical action and cognitive load of the user. However, recent conceptualizations, supported by research in various fields of science, emphasize human physical action in cognitive processes and knowledge formation. In fact, physical and closely related imaginary movement can be seen as the quintessence of humanity. Acknowledging this should imply a new approach to the design of interactive technology. In the current study, we propose a choreographic approach for shifting the focal point of interaction design to the aspects of human activity and movement within a technologized context. Hence, th…
Post Feed-in Scheme Photovoltaic System Feasibility Evaluation in Italy: Sicilian Case Studies
2014
: Thanks to national energy policies, over recent years the Italian photovoltaic (PV) sector has undergone an extraordinary growth, also affecting the primary sector. In this context, Mediterranean greenhouses are well-adapted to photovoltaic systems because they represent one of the most energy-intensive sectors in agriculture. The Italian feed-in scheme ended at the beginning of 2013, making it necessary to investigate the feasibility of photovoltaic systems devoid of any electricity production-related incentives. In this paper, production cost and profitability analyses of photovoltaic electricity have been conducted, considering Mediterranean solar greenhouses in which, thanks to net me…
Team collaboration capabilities as a factor in startup success
2018
[EN] This paper discusses the role of team collaboration as a building block for cultivating capabilities in technology-based startups. This conceptual framework draws on a literature review of innovation and entrepreneurship research to understand the intra-organization collaboration mechanisms among team members in technology-based startups. Introducing the concept of team collaboration capabilities represents a new approach to understanding the interaction conditions that give rise to new capabilities from a venture team as its organizational base. Rapid new capability building represents a competitive advantage in environments characterized by innovative technological change, known as d…
Comunicar Conocimientos vs. Organizar el Conocimiento: la Gestión del Gen-preneur en el Aula
2014
Se han hecho innumerables pruebas para constatar que la creatividad es una habilidad crítica para los emprendedores y su formación emprendedora (Schmidt, J. et al. 2012), incluso se ha detectado que la práctica sobre el pensamiento divergente incrementa las habilidades emprendedoras de los estudiantes para generar un mayor número y rango de ideas, pero NO así, sus enfoques para la resolución creativa de problemas. Nuestro objetivo será mostrar que el emprendimiento es una faceta de la creatividad y que, el emprendedor "oculto" en el discente, necesitará observar y confirmar la existencia de condicionantes externos suficientes, para liberar su actitud emprendedora retenida, asimismo, será im…
The impact of TiO2 modifications on the effectiveness of photocatalytic processes [review]
2018
This paper outlines the recent studies on the application of photocatalysis using semiconductors, with modified titanium dioxide (TiO2) in the process of reducing chemical contamination of surface and ground waters. During the last forty years, an increasing interest in catalysts of this type is noticeable. Hence, a wide range of methods of TiO2 modifications have been proposed so far by using its various polymorphs, composites with metals and non-metals and polymer-coatings or impregnating it with dyes that effectively absorb sunlight.
Relationship among Perceived Dynamism, Technological Posture and Innovation Performance
2014
A main strategic election for a firm is its technological posture, which can be understood as its propensity to innovate and the moment for the introduction of technological changes into the market. This paper, which focuses on the renewable energy industry in Spain, establishes that in environments in which dynamism is understood by managers as high, and the appreciation of change is greater, firms develop a greater tendency towards technological leadership postures (pioneer or first-mover strategy) rather than conservative or follower postures (last-mover strategy). The results of the analysis, carried out through a structural equation model based on the partial least squares (PLS) techni…