Search results for "STIR"
showing 10 items of 426 documents
Development of Neural Network Prediction Models for the Energy Producibility of a Parabolic Dish: A Comparison with the Analytical Approach
2022
Solar energy is one of the most widely exploited renewable/sustainable resources for electricity generation, with photovoltaic and concentrating solar power technologies at the forefront of research. This study focuses on the development of a neural network prediction model aimed at assessing the energy producibility of dish–Stirling systems, testing the methodology and offering a useful tool to support the design and sizing phases of the system at different installation sites. Employing the open-source platform TensorFlow, two different classes of feedforward neural networks were developed and validated (multilayer perceptron and radial basis function). The absolute novelty of this approac…
Energy and Environmental Assessment of a Hybrid Dish-Stirling Concentrating Solar Power Plant
2022
Although the 2019 global pandemic slowed the growing trend of CO2 concentrations in the atmosphere, it has since resumed its rise, prompting world leaders to accelerate the generation of electricity from renewable sources. The study presented in this paper is focused on the evaluation of the energy and environmental benefits corresponding to the hypothesis of hybridizing a dish-Stirling plant installed on the university campus of Palermo (Italy). These analyses were carried out by means of dynamic simulations based on an accurate energy model validated with the experimental data collected during the measurement campaign that occurred during the period of operation of the reference plant. As…
SHEAR RESISTANCE OF R/C BEAMS PROVIDED WITH DIFFERENTLY-INCLINED TRANSVERSE REINFORCEMENT
2012
The model for the evaluation of shear resistance of reinforced concrete member provided with transverse web reinforcement, derived by Nielsen (1999) on the basis of the variable inclination stress field approach, is generalized here to predict the shear strength of r.c. beams equipped with two sets of differently-inclined transversal web reinforcement and longitudinal skin reinforcement. Numerical analyses emphasize the efficiency of double inclined web transverse reinforcement in providing shear strength to beams.
Organizational Culture Beyond Consensus and Clarity: Narratives From Elite Sport
2020
In sport psychology, organizational culture is usually depicted as shared, consistent, and clear—the glue that holds people together so they can achieve success. There is, however, growing discontent in sport psychology with this idea of culture and extensive critiques in other academic domains that suggest this perspective is limited. Accordingly, the authors draw on narrative interviews with participants (n = 7) from different areas of sport and use Martin and Meyerson’s three perspective (integration, differentiation, and fragmentation) approach to culture alongside thematic analysis to reconstruct three “ideal cases” that exemplify each perspective. The findings emphasize a different pa…
Nanocompositi a base di copolimero stirene-butadiene-stirene e nanotubi di carbonio: morfologia e proprietà
2014
The work-family interface and its correlates : integrating variable and person oriented approaches
2017
The aim of this research was to examine key correlates of the interaction between work and family in one Nordic country, Finland, using a person- oriented and variable-oriented approach. The correlates that were chosen and examined over the course of three studies were job control and work-family boundary management styles, turnover intention, core self-evaluations, and vigor at work. Study I was part of a 2-year longitudinal study which was conducted in two Finnish universities (n = 700); Study II consisted of two samples, one of university employees (University 1, n = 666; University 2, n = 644), and the other of nurses (n = 301) from one healthcare district in Finland; and Study III used…
On the spatial spread of a pattern
1980
A simple process is considered for the spread of a pattern in a spatially distributed population. Expressions are given for the stochastic means, variances and covariances. Central limit theorems are obtained for the number of individuals that have the pattern, and the time needed for the pattern to reach the n-th subpopulation.
Elämäntyylit ja elämäntyylikulut aikuisuudessa
2013
Tämän tutkimuksen tarkoituksena oli kartoittaa aikuisuuden elämäntyylejä ja niiden jatkuvuutta aikuisuuden eri vaiheissa. Lisäksi oltiin kiinnostuneita elämäntyyliristiriitojen kokemisesta aikuisuudessa. Tutkimus on osa Lea Pulkkisen vuonna 1968 aloittamaa Lapsesta aikuiseksi –pitkittäistutkimusta, josta tähän tutkimukseen hyödynnettiin aineistoja kolmesta tiedonkeruuvaiheesta tutkittavien ollessa 36-, 42- ja 50-vuotiaita (n = 50, 26 naista ja 24 miestä). Tutkimuksessa tarkasteltiin tutkittavien tuottamia vastauksia kysymyksiin, joiden tarkoitus oli tavoittaa kyseisen henkilön tavallinen arkipäivä, minkälainen on se elämäntyyli jonka mukaan hän haluaa elää ja minkälaisia asioita sisällyttää…
MODELLING, OPTIMIZATION, AND 3E-ANALYSIS OF DISH-STIRLING CONCENTRATING SOLAR POWER SYSTEMS
2022
raggiungimento degli obiettivi del precedente Accordo di Parigi, tutti i Paesi sono stati invitati a impegnarsi a garantire l'azzeramento globale entro la metà del secolo e a mantenere l'aumento della temperatura media globale significativamente al di sotto dei 2 °C, rispetto ai livelli preindustriali, entro il 2050, e più precisamente entro il limite superiore di 1,5 °C. Tutti i Paesi stanno concentrando le loro politiche su una transizione energetica globale che consiste nell'aumento dell'uso di fonti rinnovabili per la generazione di elettricità e nell'uso diretto di calore e biomassa rinnovabili, nell'uso diretto di elettricità pulita nei trasporti e nelle applicazioni termiche, nel mig…
Conflict of Interest : The Common Thread Underlying Ethical Lapses
2005
The purpose of this paper is to examine various industries for examples of conflicts of interest, and the resulting harmful ethical and managerial effects. All of these examples are well known, having appeared in various news sources. However, each incident has been viewed as an isolated case with no common lessons to be learned. The authors posit that, were it not for the presence of conflict of interest, these abuses might never have occurred. Even the most ethical of people might succumb to temptation when the potential gains are large. It may be impossible to eliminate all conflicts of interest but reducing them will certainly enhance the chance that people will do what is right. Organi…