Search results for " Cost"

showing 10 items of 3966 documents

Representation of Stationary Multivariate Gaussian Processes Fractional Differential Approach

2011

In this paper, the fractional spectral moments method (H-FSM) is used to generate stationary Gaussian multivariate processes with assigned power spectral density matrix. To this aim, firstly the N-variate process is expressed as sum of N fully coherent normal random vectors, and then, the representation in terms of HFSM is used.

symbols.namesakeMathematical analysissymbolsRepresentation (systemics)Applied mathematicsMultivariate normal distributionMultivariate Processes Fractional Calculus Fractional Spectral MomentsFractional differentialSettore ICAR/08 - Scienza Delle CostruzioniGaussian processMathematicsProceedings of the 6th International Conference on Computational Stochastic Mechanics(CSM-6)
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E-NAUTILUS: A decision support system for complex multiobjective optimization problems based on the NAUTILUS method

2015

Interactive multiobjective optimization methods cannot necessarily be easily used when (industrial) multiobjective optimization problems are involved. There are at least two important factors to be considered with any interactive method: computationally expensive functions and aspects of human behavior. In this paper, we propose a method based on the existing NAUTILUS method and call it the Enhanced NAUTILUS (E-NAUTILUS) method. This method borrows the motivation of NAUTILUS along with the human aspects related to avoiding trading-off and anchoring bias and extends its applicability for computationally expensive multiobjective optimization problems. In the E-NAUTILUS method, a set of Pareto…

ta113Decision support systemMathematical optimizationInformation Systems and ManagementOptimization problemMultiple criteria optimizationGeneral Computer ScienceComputer sciencePareto principleTrading-offManagement Science and Operations ResearchSpace (commercial competition)Multiple objective programmingMulti-objective optimizationIndustrial and Manufacturing EngineeringSet (abstract data type)Modeling and SimulationPoint (geometry)Computational costInteractive methodsEuropean Journal of Operational Research
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Reciprocal commitment in academic careers? : Finnish implications and international trends

2016

This study explores the nature of reciprocal commitment in academic careers. The article is based on a survey conducted in autumn 2013 among fixed-term employees at eight major universities in Finland (N = 810). The analysis is focusing on researchers who have a doctoral degree and who are working on a fixed-term contract at their university (n = 308). According to our study, researchers experience their working conditions are insecure and many of them have considered leaving their universities. Despite the fact that they find their work meaningful their uncertain and poor working conditions are related to their thoughts of leaving the university. In addition in many of the cases leaving th…

ta520Higher educationacademic careeracademic workEducationreciprocityReciprocity (social psychology)0502 economics and businessta517ta516SociologyTransaction costbusiness.industry05 social sciencescommitment050301 educationtrustPublic relationsWork environmentTrend analysisWork (electrical)luottamusWell-beingvastavuoroisuusbusiness0503 education050203 business & managementReciprocal
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Riconfigurare i territori metroplitani. Forme di urbanizzazione e fenomeni di pressione insediativa sui sistemi di interesse naturale in Sicilia

2018

The consumption of the soil due to urbanization it is a phenomena already for many years under observations, but of which only the scientific environment has noticed the elevated environmental impact progress. From a disciplinary point of view, is possible to identify a line of research focusing on the analysis and identification of new morphologies of urbanization and on the interaction among different settlement patterns coexisting in a specific context. This reading complements with the scientific production about the forms of settlement pressure on environmental systems, producing change and deterioration on natural ecosystems and loss of biodiversity. A necessary reference for this lin…

tale percentuale se considerata per i comuni costieri supera il 75% del territorio urbanizzato. Nel caso dei sistemi naturali i fenomeni di pressione umana pesano su una situazione già critica data da una distribuzione puntuale delle aree protette. Il livello di frammentazione e isolamento di queste aree rischia di peggiorare. In Sicilia l'assenza di strumenti di valutazione ambientale e lo scollamento tra pianificazione urbana e regionale e pianificazione settoriale hanno determinato un inadeguato livello di controllo della pressione umana sui sistemi ambientali. Riguardo a questo quadro generale il presente documento presenta un chiarimento e una riformulazione del rapporto di reciprocità tra ambiente edificato e territorio aperto con l'obiettivo di individuare possibili strategie per gestire i fenomeni di dispersione urbana nel contesto metropolitano obiettivo principale delle politiche territoriali europee e di molte politiche nazionali degli Stati membri.Settore ICAR/20 - Tecnica E Pianificazione UrbanisticaIl consumo del suolo a causa dell'urbanizzazione è un fenomeno già da molti anni sotto osservazione ma di cui solo l'ambiente scientifico ha notato l'elevato impatto ambientale. Da un punto di vista disciplinare è possibile individuare una linea di ricerca incentrata sull'analisi e l'identificazione di nuove morfologie dell'urbanizzazione e sull'interazione tra i diversi modelli insediativi che coesistono in un contesto specifico. Questa lettura si integra con la produzione scientifica sulle forme di pressione insediativa sui sistemi ambientali producendo cambiamento e deterioramento degli ecosistemi naturali e perdita di biodiversità. Un riferimento necessario per questa linea sono gli studi sui processi di frammentazione (lineare concentrato misto) e quelli sulla segregazione degli habitat naturali e seminaturali (protetti o non protetti). Tali riferimenti si combinano con le analisi condotte sul processo di sostituzione dei sistemi naturali con l'ecomosaico artificiale. Lo stato dell'urbanizzazione in Sicilia è interessato dal fenomeno della dispersione urbana che a partire dagli anni Settanta ha contribuito fortemente a plasmare il territorio regionale sia dal punto di vista fisico che funzionale. Tale fenomeno ha interessato principalmente le aree marginali intorno alle aree metropolitane dove i terreni consumati dagli insediamenti a bassa densità abitativa rappresentano il 42% dell'intero territorio urbanizzatoSettore ICAR/21 - Urbanistica
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Considerazioni sulle tecniche costruttive rilevabili nella torre del castello di Brolo

2017

Il contributo espone un'analisi storica delle tecniche costruttive murarie nella torre del castello di Brolo, in Sicilia, inquadrandole nella sfera degli studi sull'argomento. Per la Sicilia i paramenti murari che non sono ancora stati studiati in modo da potere essere catalogati e attribuiti a determinati periodi della storia dell'architettura sono quelli legati alla costruzione che utilizza conci sbozzati o informi. In genere sono paramenti murari in cui gli elementi impiegati non rispondono a regole stereometriche riconducibili ad una precisa cultura del costruire. Si tratta di una tecnica costruttiva muraria che è stata adoperata per la costruzione di edifici il più delle volte con gran…

tecniche costruttive restauri torri MessinaSettore ICAR/19 - Restauro
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I soffitti: tecniche costruttive

2009

tecniche costruttivesoffittiSettore ICAR/12 - Tecnologia Dell'Architettura
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Injury and Throwing Distance in Teenage Cyclist- Vehicle Crash

2016

The study of the injury caused by vehicle-teenage cyclist crash is presented in this paper. The results of the crash with three vehicles: sedan, SUV and Pick up are compared. Three different positions are analyzed: front, rear and lateral position. The injury on the cyclist head is examined by HIC criterion, in the way indicated by the rules. A comparison is done between the results of the simulations for Pick up, SUV and sedan, concluding that the injury of the head is more dangerous for Pick-up impact than SUV or the sedan, but only at greater speed than 40 km/h. Teenage cyclist is more likely to suffer an injury to the chest in rear impacts with the sedan, because 3 ms values remain abov…

teenage bicyclistSettore ING-IND/14 - Progettazione Meccanica E Costruzione Di Macchine3msSettore ING-IND/10 - Fisica Tecnica Industrialevehicle impactteenage bicyclist; vehicle impact;(AIS4+) injury; HIC; 3ms; throwing distance; biomechanics(AIS4+) injuryteenage bicyclist vehicle impact (AIS4+) injury HIC 3ms throwing distance biomechanicsHICbiomechanicsthrowing distance
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HIC evaluation in teenage cyclist – SUV accident

2015

The study of the crash between normal sedan and teenage cyclist was examined in previous paper, and is here continued analyzing the influence of the front part of the vehicle in the injury caused by the accident. The vehicle is a SUV, with high frontal part. No variation is executed on the model of the teenage cyclist and the bike. The position of the teenage cyclist regard to SUV is the same: three different positions are analyzed: front, rear and lateral position. The injury on the cyclist head is examined by HIC criterion, in the way indicated in the rules. Correlation HIC – AIS is used to calculate the lethality of the injuries. The work is arranged to calculate the damage to the chest …

teenage bicyclistSettore ING-IND/14 - Progettazione Meccanica E Costruzione Di MacchineSettore ING-IND/09 - Sistemi Per L'Energia E L'Ambientesedan impactteenage bicyclist SUV impact sedan impact severe (AIS4+) injury HICteenage bicyclist; SUV impact; sedan impact; severe (AIS4+) injury; HICSUV impactHICsevere (AIS4+) injury
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Teenage cyclist - Pick up crash by multibody simulation; HIC evaluation and comparison with previous results

2016

The study of the injury caused by Pick-up vehicle-teenage cyclist crash is presented in this paper. The vehicle has high frontal part, in order to compare the results with those obtained previously in the sedan and SUV - teenage cyclist crash. No variation is executed on the model of the teenage cyclist and the bike. Three different positions are analyzed: front, rear and lateral position. The injury on the cyclist head is examined by HIC criterion, in the way indicated in the rules. Correlation HIC – AIS is used to calculate the lethality of the injuries. A comparison is made between the results of the simulations for Pick up, SUV and sedan, concluding that the injury of the head is more d…

teenage bicyclistSettore ING-IND/14 - Progettazione Meccanica E Costruzione Di MacchineSettore ING-IND/10 - Fisica Tecnica Industrialeteenage bicyclist Pick-up impact severe (AIS4+) injury HIC biomechanicsPick-up impactHICbiomechanicsteenage bicyclist; Pick-up impact; severe (AIS4+) injury; HIC; biomechanicssevere (AIS4+) injury
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Biomechanics Parameters in the Vehicle-Cyclist Crash with Accident Analysis in Palermo

2014

The vehicle-bicyclist impact is studied in this paper. After analysis of the accidents in Palermo in the last years, the multibody simulation of the crash is executed by making use of Visual Nastran. Dummy, car and bicycle are those used in previous works. The attention is on a teenage cyclist, because the data on this argument are found in literature with difficulty. The impact is simulated at four different speeds until 50 km/h, with three different positions of the cyclist relative to the vehicle: frontal, side and rear. In particular the injury of the head is analyzed using the parameter HIC and the chest injury is analyzed by 3 ms criterion; the likelihood AIS 4+ is calculated, conclud…

teenage bicyclistSettore ING-IND/14 - Progettazione Meccanica E Costruzione Di MacchineSettore MED/43 - Medicina Legalevehicle impact3ms criterionAccidentologyHICAccidentology teenage bicyclist vehicle impact severe (AIS4+) injury HIC 3ms criterionsevere (AIS4+) injury
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