Search results for "Travel"

Influence of rounding errors on the quality of heuristic optimization algorithms

2011

Abstract Search space smoothing and related heuristic optimization algorithms provide an alternative approach to simulated annealing and its variants: while simulated annealing traverses barriers in the energy landscape at finite temperatures, search space smoothing intends to remove these barriers, so that a greedy algorithm is sufficient to find the global minimum. Several formulas for smoothing the energy landscape have already been applied, one of them making use of the finite numerical precision on a computer. In this paper, we thoroughly investigate the effect of finite numerical accuracy on the quality of results achieved with heuristic optimization algorithms. We present computation…

Investigation of acceptance simulated annealing — A simplified approach to adaptive cooling schedules

2010

Abstract Simulated annealing is the classic physical optimization algorithm, which has been applied to a large variety of problems for many years. Over time, several adaptive mechanisms for decreasing the temperature and thus controlling the acceptance of deteriorations have been developed, based on the measurement of the mean value and the variance of the energy. Here we propose a new simplified approach in which we consider the probability of accepting deteriorations as the main control parameter and derive the temperature by averaging over the last few deteriorations stored in a memory. We present results for the traveling salesman problem and demonstrate, how the amount of data retained…

Investigation of Simulated Trading — A multi agent based trading system for optimization purposes

2010

Abstract Some years ago, Bachem, Hochstattler, and Malich proposed a heuristic algorithm called Simulated Trading for the optimization of vehicle routing problems. Computational agents place buy-orders and sell-orders for customers to be handled at a virtual financial market, the prices of the orders depending on the costs of inserting the customer in the tour or for his removal. According to a proposed rule set, the financial market creates a buy-and-sell graph for the various orders in the order book, intending to optimize the overall system. Here I present a thorough investigation for the application of this algorithm to the traveling salesman problem.

Un caso di sternismo: le "Avventure e osservazioni" di Filippo Pananti

1997

Il saggio studia l'influsso di Sterne sulle "Avventure e osservazioni" di Pananti e su altre relazioni di viaggio di primo Ottocento. The essay deals about Sterne's influence on Pananti's and othes authors' travel literature

The Organizational Climate for Sustainable Commuting: An Italian Validation Study in the Academic Sector

2021

Promoting sustainable commuting represents a valuable contribution to tackle the climate crisis, and organizations could act as frontrunners in this regard. Accordingly, conceptualizing and measuring how organizational environments contribute to sustainable commuting has become relevant. This study aims to conceptualize and operationalize the construct of Organizational Climate for Sustainable Commuting (OCSC) and validate the OCSC scale in the Italian language. Data were gathered in an Italian university from 8542 participants. The validation was based on EFA and CFA, reliability, and aggregation indices analyses. To validate the scale, convergent, discriminant, internal construct, and cri…

Discursive construction of subjectivity in English: when travellers complain through their reviews in TripAdvisor

2017

En este artículo analizamos las quejas de los viajeros en un corpus integrado por 80 opiniones o reseñas sobre cuatro hoteles, alojadas en la plataforma TripAdvisor en las categorías de puntuación “malo/pésimo” y “bueno/excelente”. El estudio se enmarca en el análisis del discurso interpersonal aplicado a géneros turísticos digitales (Mapelli 2008, 2016, Suau Jiménez 2011, 2012a, 2012b, 2014), con el propósito de caracterizar no solo el aspecto relacional entre autor y lector, sino también el proposicional o de contenido. Nos centramos en las quejas, ya que constituyen una parte fundamental de las opiniones. Abordamos la construcción de la subjetividad en la voz de los viajeros –del autor- …

Identification of determinants for rescheduling travel mode choice and transportation policies to reduce car use in urban areas

2018

[EN] This paper presents a qualitative analysis about the determinants related to rescheduling travel mode decisions during the activity scheduling process. Notably, we were interested to study changes between intention and behavior. Data used came from an in-depth Computer Assisted Telephone Interview (CATI) follow up survey to habitual drivers carried out during the implementation of a panel survey. An interpretative qualitative method based on Analytic Induction was used to cope with the complex nature of rescheduling decisions and the characteristics of the data. The Theory of Planned Behavior has been used to gain a better understanding of the reasons associated with rescheduling trave…

"TRAVEL HEALTH RECOMMENDATIONS FOR INTERNATIONAL TRAVELLERS IN ITALIAN TRAVEL CLINICS"

2007

Roads, travelling and communication in the Polish – Lithuanian Commonwealth in the 18th century. Russian and West European visitors’ perspective

2020

W artykule przedstawiony został stan techniczny dróg lądowych i rzecznych, mostów, grobli oraz pozostałej infrastruktury komunikacyjnej w Polsce na podstawie relacji podróżników z zagranicy, w tym Rosjan. Stan oraz jakość lądowych i rzecznych środków transportu był oceniany przez cudzoziemców bardzo nisko, podobnie jak jakość usług oferowanych w przydrożnych karczmach w Polsce i na Litwie. W rezultacie podróżowanie w XVIII w. po Rzeczypospolitej mogło stanowić interesujące doświadczenie. Tak goście z Rosji, jak i z krajów zachodniej Europy natrafiali na wiele przeszkód w trakcie podróży, postrzegając przy tym kraj jako pełen paradoksów. Fatalny stan dróg, przerażające swoim standardem karcz…

Ultreya, suseya, Santiago!” Viaggio e spazialità ne La ballata dei pellegrini

2020

Per studiare dal punto di vista della geografia culturale alcuni aspetti del pellegrinaggio a Santiago de Compostela, in Spagna, il capitolo prende in considerazione un testo letterario, il romanzo autobiografico "La ballata dei pellegrini" della scrittrice francese Edith De La Héronnière, pubblicato per la prima volta nel 1993 e tradotto in italiano nel 2004. Il romanzo racconta l’esperienza del pellegrinaggio giacobeo effettuato dall’autrice negli anni Novanta assieme a tre compagni di viaggio partendo da un cammino francese. In particolare, attraverso l’analisi di alcune parti del testo, si indagano le modalità attraverso le quali la narrazione costruisce e descrive lo spazio fisico e si…