Letteratura scientifica selezionata sul tema "Routines de mobilité"
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Articoli di riviste sul tema "Routines de mobilité":
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Grandinetti, Roberto. "A Routine-Based Theory of Routine Replication". Sustainability 14, n. 14 (6 luglio 2022): 8254. http://dx.doi.org/10.3390/su14148254.
Abstract (sommario):
Organizational routines have been investigated by scholars from two opposite perspectives: the first is rooted in the evolutionary economics of Nelson and Winter; the second relies on the reconceptualization of routines proposed by Feldman and Pentland. The main reason that has kept the perspectives separated concerns the issue of routine replication, which found space in the former while it remained in the shadows in the latter. Studies that have dealt with this issue offer many clues on the one or other form that replication can take. What is lacking is a routine-based theory of routine replication capable of comparing their different forms. The paper pursues this goal in two stages. First, routines are reconceptualized as repetitive, recognizable patterns of interdependent actions, connected with the external environment, guided by specific knowledge and involving multiple, interacting actors and artifacts. Then, this reconceptualization leads to a discussion of the issue of routine replication and its forms. This way of conceiving routines leads to developing an original and unitary theoretical framework covering the different forms of routine replication. What lends intra-organizational replication a greater replicability than inter-organizational replication is the presence of a template and of actors specialized in planning the replication process. In its serial and routinized form, intra-organizational replication can potentially reach the highest level of replicability. The same results can be achieved by the routine replication that underlies franchise systems. In the two forms of inter-organizational replication—spin-offs and employee mobility—the template is replaced by a weaker knowledge repository consisting of the memory of individuals who leave one organization and try to replicate its routines at another. The disadvantage deriving from the lack of a template can be contained when specific factors are present that facilitate the work of replication actors.
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Hrabčák, Dávid, Martin Matis, L’ubomír Doboš e Ján Papaj. "Students Social Based Mobility Model for MANET-DTN Networks". Mobile Information Systems 2017 (2017): 1–13. http://dx.doi.org/10.1155/2017/2714595.
Abstract (sommario):
In the real world, wireless mobile devices are carried by humans. For this reason, it is useful if mobility models as simulation tools used to test routing protocols and other MANET-DTN features follow the behaviour of humans. In this paper, we propose a new social based mobility model called Students Social Based Mobility Model (SSBMM). This mobility model is inspired by the daily routine of student’s life. Since many current social based mobility models give nodes freedom in terms of movement according to social feeling and attractivity to other nodes or places, we focus more on the mandatory part of our life, such as going to work and school. In the case of students, this mandatory part of their life is studying in university according to their schedule. In their free time, they move and behave according to attractivity to other nodes or places of their origin. Finally, proposed SSBMM was tested and verified by Tools for Evaluation of Social Relation in Mobility Models and compared with random based mobility models. At the end, SSBMM was simulated to examine the impact of social relations on routing protocols.
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He, Xingyu, Guisong Yang e Hao Zhang. "DRANS: Daily Routine Analysis for Node Searching in delay tolerant networks". International Journal of Distributed Sensor Networks 13, n. 7 (luglio 2017): 155014771771810. http://dx.doi.org/10.1177/1550147717718105.
Abstract (sommario):
In delay tolerant networks, the success rate and the transmission speed are restricted by limited social interaction and complex node mobility pattern analysis. To increase the success rate and reduce the transmission delay in delay tolerant networks, we propose Daily Routine Analysis for Node Searching in delay tolerant networks. In Daily Routine Analysis for Node Searching, each node is required to generate a Staying Probability Table and a Transiting Probability Table by analyzing its own daily routine, then to distribute its Staying Probability Table and Transiting Probability Table to the whole network with the help of other nodes having different mobility patterns. On the basis of the Staying Probability Table and Transiting Probability Table, Daily Routine Analysis for Node Searching further provides a node tracking strategy and an opportunistic routing strategy for delivering data from the source node to the destination node. Trace-driven experiments are performed to compare Daily Routine Analysis for Node Searching with previous node searching methods. The experimental results demonstrate that Daily Routine Analysis for Node Searching is able to promote the success rate and reduce the transmission delay effectively.
4
Ernest, Petro Pesha, H. Anthony Chan, Jiang Xie e Olabisi Emmanuel Falowo. "Mobility management with distributed mobility routing functions". Telecommunication Systems 59, n. 2 (7 gennaio 2015): 229–46. http://dx.doi.org/10.1007/s11235-014-9958-4.
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Ladru, Danielle Ekman, e Katarina Gustafson. "‘Yay, a downhill!’: Mobile preschool children’s collective mobility practices and ‘doing’ space in walks in line". Journal of Pedagogy 9, n. 1 (1 giugno 2018): 87–107. http://dx.doi.org/10.2478/jped-2018-0005.
Abstract (sommario):
Abstract In the field of early childhood research children’s mobility is usually discussed only in terms of physical activity in the preschool yard. More seldom is it discussed in terms of mobility practices and how young children move in public spaces. With unique detailed video-ethnographic data on mobile preschools and a new combination of theories on space, mobilities and peer culture this article analyses how young children negotiate mobility practices and engage in embodied learning in the collective preschool routine of walking in line. Two empirical examples of walking in line in contrasting public spaces show how the mobile preschool group moves in space as a collective body co-produced by children’s and teachers’ individual bodies. It is argued that walks in line are not merely a form of ‘transport’ between places but are important as social and learning spaces. While walking in line, children collectively ‘do’ space in diverse ways depending on where and how they move, and in relation to where and when teachers negotiate safety issues. In this process, the spaces, activities and routines alike are transformed.
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Wiles, Janine. "Daily geographies of caregivers: mobility, routine, scale". Social Science & Medicine 57, n. 7 (ottobre 2003): 1307–25. http://dx.doi.org/10.1016/s0277-9536(02)00508-7.
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Penger, Susanne, e Frank Oswald. "A New Measure of Mobility-Related Behavioral Flexibility and Routines in Old Age". GeroPsych 30, n. 4 (dicembre 2017): 153–63. http://dx.doi.org/10.1024/1662-9647/a000176.
Abstract (sommario):
Abstract. Although daily out-of-home mobility is crucial for well-being in later life, the psychological determinants thereof are not yet fully understood. This study describes attitudes toward daily out-of-home mobility from a person-environment interaction perspective and develops an instrument to measure mobility-related behavioral flexibility and routines in old age. Data were drawn from 265 older adults (aged 65–99). An examination of the factorial structure using exploratory factor analysis revealed three main mobility-related factors: behavioral flexibility with regard to environmental challenges, behavioral flexibility with regard to personal challenges, and a preference for routines. The instrument demonstrated acceptable internal consistency and factorial validity. The study contributes toward a better understanding of the motivational aspects of daily out-of-home mobility in later life.
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Pereira, Denis Biolkino de Sousa, e William Rodrigues Ferreira. "REFLEXOS DAS OCUPAÇÕES URBANAS NA MOBILIDADE ÀS MARGENS DA RODOVIA ESTADUAL GO-060 ENTRE GOIÂNIA (GO) E TRINDADE (GO)". Revista Cerrados 18, n. 01 (19 maggio 2020): 189–219. http://dx.doi.org/10.22238/rc2448269220201801189219.
Abstract (sommario):
O estudo pretende compreender a dinâmica dos diversos tipos de ocupações implantadas no entorno da Rodovia Estadual GO- 060, entre a cidade de Goiânia (GO) e Trindade (GO), e os seus reflexos na mobilidade urbana. O problema se identifica na relação causa e efeito no conflito entre o espaço urbano e o sistema de transportes, em áreas conurbadas da Região Metropolitana de Goiânia (GO). O objetivo consiste em analisar as áreas de ocupação do recorte espacial, o fluxo veicular dos modos de transportes e o índice de mobilidade, em função das tipologias de ocupação, caracterizadas como polos geradores de viagens (PGVs). Para se identificar tais ocorrências, foram utilizadas metodologias adaptadas para análise espaço-temporal e redes. Os resultados mostraram as diferenças em áreas de ocupação nos PGVs Tipo Comércio/Indústria 25,74% e 30,77% e Tipo Residencial 11,41% e 38,78% para as Regiões Oeste/Mendanha e Trindade 2, para os períodos (2011/2016) e (2009/2015), respectivamente. Essa dinâmica ocupacional gerou um aumento de +87% no total de viagens do fluxo dos diversos modos de transporte e um acréscimo de +79% no índice de mobilidade para o período de 2013 a 2016, mostrando a tendência de motorização das regiões e os reflexos na mobilidade urbana.
Palavras-chave: Ocupação espacial. Sistema viário. Fluxo veicular. Transporte. Mobilidade.
REFLEXES OF URBAN OCCUPATIONS ON MOBILITY TO THE MARGINS OF THE STATE ROAD GO-060 BETWEEN GOIÂNIA (GO) AND TRINDADE (GO)
ABSTRACT
The study aims to understand the dynamics of the various types of occupations implanted around the State Highway GO-060, between the city of Goiânia (GO) and Trindade (GO), and their reflexes on urban mobility. The problem is identified in the cause and effect relationship in the conflict between urban space and the transport system in conurbated areas of the Metropolitan Region of Goiânia (GO). The objective is to analyze the areas of occupation of the spatial area, the vehicular flow of the modes of transport and the mobility index, according to the types of occupation, characterized as travel generating poles (TGPs). To identify such occurrences, methodologies adapted for spatiotemporal analysis and networks were used. The results showed the differences in occupation areas in the Trade / Industry Type 25.74% and 30.77% and Residential Type 11.41% and 38.78% for the West / Mendanha and Trindade 2 Regions for the periods (2011/2016) and (2009/2015) respectively. This occupational dynamic generated an increase of + 87% in the total travel flow of the different modes of transport and an increase of + 79% in the mobility index for the period from 2013 to 2016, showing the trend of motorization in the regions and the reflexes in urban mobility.
Keywords: Spatial occupation. Road system. Vehicular flow. Transport. Mobility.
REFLETS DES OCCUPATIONS URBAINES SUR LA MOBILITÉ LE LONG DE LA ROUTE D’ÉTAT GO-60 ENTRE GOIANIA (GO) ET TRINDADE (GO)
RÉSUMÉ
L’étude prétend comprendre la dynamique des divers types d’occupations implantées le long de la Route d’État GO-060, entre les villes de Goiânia (GO) et Trindade (GO), et ses retombées sur la mobilité urbaine. Le problème s’identifie dans la relation de cause à effet dans le conflit entre espace urbain et système de transport, dans les aires urbanisées de la Région Métropolitaine de Goiânia (GO). L’objectif est d’analyser les zones d’occupation du découpage spatial, le flux routier des modes de transport et l’indice de mobilité selon les typologies d’occupation, caractérisées comme pôles générateurs de voyages (PGVs). L’identification de ces faits s’est réalisée par l’utilisation de méthodologies adaptées à l’analyse spatio-temporelle et de réseaux. Les résultats montrent des différences de PGVs dans les zones d’occupation du type Commerce/Industrie 25,74% et 30,77% et du type résidentiel 11,41% et 38,78% pour les régions Ouest/Mendanha et Trindade 2, respectivement pour les périodes (2011/2016) et (2009/2015). Cette dynamique d’occupation révèle une augmentation de +87% du total de voyages de flux des différents modes de transport et une croissance de +79% de l’indice de mobilité pour la période de 2013 à 2016, montrant la tendance de motorisation des régions et ses reflets sur la mobilité urbaine.
Mots clés: Occupation spatial. Système routier. Flux de véhicules. Transport. Mobilité.
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Kumar, M. K. Jeya. "A Survey of Mobile Ad Hoc Reactive Routing Protocols in Two Different Mobility Models". International Journal of Engineering and Technology 1, n. 1 (2009): 82–87. http://dx.doi.org/10.7763/ijet.2009.v1.15.
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Plantinga, Laura C., Courtney Hoge, Charmayne Dunlop-Thomas, Brad D. Pearce, S. Sam Lim, Cristina Drenkard e C. Barrett Bowling. "Association of COVID-19 pandemic-related concern and health routine changes with functioning among individuals with systemic lupus erythematosus". Lupus Science & Medicine 9, n. 1 (febbraio 2022): e000658. http://dx.doi.org/10.1136/lupus-2022-000658.
Abstract (sommario):
ObjectiveTo examine whether pandemic-related issues were associated with physical functioning, community mobility and cognition among individuals with SLE.MethodsParticipants were recruited (6 October 2020–11 November 2021) for this cross-sectional study from a population-based cohort of individuals with validated SLE in metropolitan Atlanta, as part of an ongoing ancillary study. Pandemic-related issues (concern about the pandemic (very vs somewhat/not at all concerned); changes in physical activity and sleep (less vs more/same); difficulty obtaining food and medications and accessing routine care (any vs none)) were self-reported. Self-reported physical functioning and episodic and working memory performance were reported as t-scores (such that a score of 50=population mean and a 10-point difference=1 SD) and community mobility scores ranged from 0 to 120, with higher scores representing better functioning for all domains. Differences in scores were assessed via t-tests and age-adjusted, sex-adjusted and race-adjusted linear regression.ResultsAmong 245 participants (mean age, 46 years; 95% female, 77% black), physical functioning t-scores (mean=44) were consistently lower (by 3–5 points) for those who reported concern about the pandemic, less physical activity and sleep, difficulty obtaining food and medications, and accessing routine care. Similarly, community mobility scores (mean=48) were lower (by 10–20 points) for these individuals. There were no substantial differences in episodic memory and working memory t-scores (mean=50 and 47, respectively) by pandemic-related issues.ConclusionWe found that physical functioning and community mobility, but not cognition, were lower among those who reported more concern about the pandemic or greater disruptions to health routines. Future studies should explore interventions among these vulnerable individuals with SLE, who already disproportionately suffer from functional impairment, to maintain functioning and prevent adverse outcomes during times of crisis.
Tesi sul tema "Routines de mobilité":
1
Seppecher, Manon. "Mining call detail records to reconstruct global urban mobility patterns for large scale emissions calculation". Electronic Thesis or Diss., Lyon, 2022. http://www.theses.fr/2022LYSET002.
Abstract (sommario):
En milieu urbain, le trafic routier contribue de manière significative aux émissions atmosphériques, enjeu majeur de la lutte contre le changement climatique. Par conséquent, la surveillance conjointe du trafic routier et des émissions qu’il génère constitue un support essentiel de la décision publique. Au-delà de simples procédures de suivi, les pouvoirs publics ont besoin de méthodes d’évaluation des politiques de transport selon des critères environnementaux.Le couplage de modèles de trafic avec des modèles d’émissions constitue une réponse adaptée à ce besoin. Cependant, l’intégration de tels models à des outils d'aide à la décision nécessite une ca-ractérisation fine et dynamique de la mobilité urbaine. Les données de téléphonie mobile, et en particulier les statistiques d'appel (données CDR), sont une alternative aux données traditionnelles pour estimer cette mobilité. Elles sont riches, massives, et disponibles partout dans le monde. Néanmoins, leur utilisation pour la caractérisation systématique du trafic routier est restée limitée. Cela s'explique par une faible résolution spatiale et des taux d'échantillonnage temporels sensible aux comportements de communication.Cette thèse de doctorat interroge l'estimation des variables de trafic nécessaires au calcul d'émis-sions atmosphériques (distances totales parcourues et vitesses moyennes de trafic) à partir de telles données, et malgré leurs biais. Une première contribution importante est d’articuler des méthodes de classification des individus avec deux approches distinctes de reconstruction de la mobilité. Un seconde contribution est le développement d'une méthode d'estimation des vitesses de trafic basée sur la fusion de larges quantité de données de déplacements. Enfin, un processus méthodologique complet de modélisation et de traitement des données est avancé. Il articule de façon cohérente les méthodes proposées dans cette thèseRoad traffic contributes significantly to atmospheric emissions in urban areas, a major issue in the fight against climate change. Therefore, joint monitoring of road traffic and related emissions is essential for urban public decision-making. And beyond this kind of procedure, public authorities need methods for evaluating transport policies according to environmental criteria.Coupling traffic models with traffic-related emission models is a suitable response to this need. However, integrating this solution into decision support tools requires a refined and dynamic char-acterization of urban mobility. Cell phone data, particularly Call Detail Records, are an interesting alternative to traditional data to estimate this mobility. They are rich, massive, and available worldwide. However, their use in literature for systematic traffic characterization has remained limited. It is due to low spatial resolution and temporal sampling rates sensitive to communication behaviors.This Ph.D. thesis investigates the estimation of traffic variables necessary for calculating air emis-sions (total distances traveled and average traffic speeds) from such data, despite their biases. The first significant contribution is to articulate methods of classification of individuals with two distinct approaches of mobility reconstruction. A second contribution is developing a method for estimating traffic speeds based on the fusion of large amounts of travel data. Finally, we present a complete methodological process of modeling and data processing. It relates the methods proposed in this thesis coherently
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Xu, Sanlin, e SanlinXu@yahoo com. "Mobility Metrics for Routing in MANETs". The Australian National University. Faculty of Engineering and Information Technology, 2007. http://thesis.anu.edu.au./public/adt-ANU20070621.212401.
Abstract (sommario):
A Mobile Ad hoc Network (MANET) is a collection of wireless mobile nodes forming a temporary network without the need for base stations or any other preexisting network infrastructure. In a peer-to-peer fashion, mobile nodes can communicate with each other by using wireless multihop communication. Due to its low cost,
high flexibility, fast network establishment and self-reconfiguration, ad hoc networking has received much interest during the last ten years. However, without a fixed infrastructure, frequent path changes cause significant numbers of
routing packets to discover new paths, leading to increased network congestion and transmission latency over fixed networks. Many on-demand routing protocols have been developed by using various routing mobility metrics to choose the most reliable
routes, while dealing with the primary obstacle caused by node mobility.
¶
In the first part, we have developed an analysis framework for mobility metrics in random mobility model. Unlike previous research, where the mobility metrics were mostly studied by simulations, we derive the analytical expressions of mobility
metrics, including link persistence, link duration, link availability, link residual time, link change rate and their path equivalents. We also show relationships between the different
metrics, where they exist. Such exact expressions constitute precise mathematical relationships between network connectivity and node mobility.
¶
We further validate our analysis framework in Random Walk Mobility
model (RWMM). Regarding constant or random variable node velocity, we construct the transition matrix of Markov Chain Model through the analysis of the PDF of node separation after one epoch. In addition, we present intuitive and simple expressions for the link residual time and link duration, for the RWMM, which relate them directly to the ratio between transmission range and node speed. We also illustrate the relationship between link change rate and link duration. Finally, simulation results for all mentioned mobility metrics are reported which match well the proposed analytical framework.
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In the second part, we investigate the mobility metric applications on caching strategies and hierarchy routing algorithm. When on-demand routing employed, stale route cache
information and frequent new-route discovery in processes in MANETs generate considerable routing delay and overhead. This thesis proposes a practical route caching strategy to minimize routing delay and/or overhead by setting route cache timeout to a mobility metric, the expected path residual time. The strategy is independent of network traffic load and adapts to various
non-identical link duration distributions, so it is feasible to implement in a real-time route caching scheme. Calculated results
show that the routing delay achieved by the route caching scheme is only marginally more than the theoretically determined minimum. Simulation in NS-2 demonstrates that the end-to-end delay from DSR routing can be remarkably reduced by our caching scheme. By using overhead analysis model, we demonstrate that the minimum routing overhead can be achieved by increasing timeout to around twice the expected path residual time, without significant increase in routing delay.
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Apart from route cache, this thesis also addresses link cache strategy which has the potential to utilize route information more efficiently than a route cache scheme. Unlike some previous link cache schemes delete links at some fixed time after they enter the cache, we proposes using either the expected path duration or the link residual time as the link cache timeout. Simulation results in NS-2 show that both of the proposed link caching schemes can improve network performance in the DSR by reducing dropped data packets, latency and routing overhead, with the link residual time scheme out-performing the path duration scheme.
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To deal with large-scale MANETs, this thesis presents an adaptive k-hop clustering algorithm (AdpKHop), which selects clusterhead (CH) by our CH selection metrics. The proposed CH selection criteria enable that the chosen CHs are closer to the cluster centroid and more stable than other cluster members with respect to node mobility. By using merging threshold
which is based on the CH selection metric, 1-hop clusters can merge to k-hop clusters, where the size of each k-hop cluster adapts to the node mobility of the chosen CH. Moreover, we propose a routing overhead analysis model for k-hop clustering
algorithm, which is determined by a range of network parameters, such as link change rate (related to node mobility), node degree and cluster density. Through the overhead analysis, we show that an optimal k-hop cluster density does exist, which is
independent of node mobility. Therefore, the corresponding optimal
cluster merging threshold can be employed to efficiently organise k-hop clusters to achieve minimum routing overhead, which is highly desirable in large-scale networks.
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The work presented in this thesis provides a sound basis for future research on mobility analysis for mobile ad hoc networks, in aspects such as mobility metrics, caching strategies and k-hop clustering routing protocols.
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Nelson, Daniel B. "Internet-Scale Reactive Routing and Mobility". DigitalCommons@CalPoly, 2009. https://digitalcommons.calpoly.edu/theses/100.
Abstract (sommario):
Since its commercialization, the Internet has grown exponentially. A large variety of devices can communicate creating advanced services for a diverse ecosystem of applications. However, as the number of Internet hosts has grown, the size of routing tables required to correctly route data between them has also increased exponentially. This growth rate necessitates increasingly frequent upgrades to routing device hardware, providing them with additional memory for fast-access storage of route information. These upgrades are both physically and fiscally untenable, and a new Internet routing solution is necessary for future growth.
This research focuses around an incrementally deployable, reactive routing system that is scalable to projected Internet growth. It requires no hardware or software updates to Internet routers, and offoads processing to end hosts and the network's edge. Within this framework, routers can make accurate decisions about optimal data paths; incurring no increase in path length over the current routing system.
A new architecture for IP Mobility is considered as a case study within this routing system, and compared with existing standards and implementations. The new architecture eliminates the triangle routing problem, while providing legacy hosts with connectivity to mobile devices. This mobility solution can integrate with a variety of hierarchical reactive routing systems with little overhead.
4
Xu, Sanlin. "Mobility metrics for routing in MANETs /". View thesis entry in Australian Digital Theses Program, 2007. http://thesis.anu.edu.au/public/adt-ANU20070621.212401/index.html.
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Moodie, Myron L., Maria S. Araujo, Todd A. Newton, Ben A. Abbott e Thomas B. Grace. "Accomplishing Seamless IP Mobility in iNET Systems". International Foundation for Telemetering, 2011. http://hdl.handle.net/10150/595612.
Abstract (sommario):
ITC/USA 2011 Conference Proceedings / The Forty-Seventh Annual International Telemetering Conference and Technical Exhibition / October 24-27, 2011 / Bally's Las Vegas, Las Vegas, NevadaOne of the core philosophies of the integrated Network Enhanced Telemetry (iNET) project is to leverage standard networking technologies whenever possible to both reduce development cost and to allow standard networking applications to function. This also provides the best long-term scalability to new unforeseen applications, much as the Internet has grown through its open standards. Unfortunately, the radio frequency (RF) channel characteristics do not fully lend themselves to the typical physical layer approaches utilized by IP technologies. As such, the iNET program has developed a specialized communication link management control. But, combining this specialized link management approach with the standardized IP infrastructure on the range and test article provides some challenges. The program has chosen a method to encapsulate the special concepts within a set of components that together (at their boundaries) form a classic router. Construction of this router is quite unique in that portions of it are geographically separate: antenna sites, test article, and mission control room. This paper describes the construction of what the program calls a "virtual router" and explains the performance issues that required it.
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Chama, Namusale Chibwe Maggie. "Impact of node mobility in user-centric routing". Doctoral thesis, Universidade de Aveiro, 2015. http://hdl.handle.net/10773/15783.
Abstract (sommario):
Doutoramento em Engenharia Eletrotécnica -TelecomunicaçõesRecent paradigms in wireless communication architectures describe environments where nodes present a highly dynamic behavior (e.g., User Centric Networks). In such environments, routing is still performed based on the regular packet-switched behavior of store-and-forward. Albeit sufficient to compute at least an adequate path between a source and a destination, such routing behavior cannot adequately sustain the highly nomadic lifestyle that Internet users are today experiencing. This thesis aims to analyse the impact of the nodes’ mobility on routing scenarios. It also aims at the development of forwarding concepts that help in message forwarding across graphs where nodes exhibit human mobility patterns, as is the case of most of the user-centric wireless networks today. The first part of the work involved the analysis of the mobility impact on routing, and we found that node mobility significance can affect routing performance, and it depends on the link length, distance, and mobility patterns of nodes. The study of current mobility parameters showed that they capture mobility partially. The routing protocol robustness to node mobility depends on the routing metric sensitivity to node mobility. As such, mobility-aware routing metrics were devised to increase routing robustness to node mobility. Two categories of routing metrics proposed are the time-based and spatial correlation-based. For the validation of the metrics, several mobility models were used, which include the ones that mimic human mobility patterns. The metrics were implemented using the Network Simulator tool using two widely used multi-hop routing protocols of Optimized Link State Routing (OLSR) and Ad hoc On Demand Distance Vector (AODV). Using the proposed metrics, we reduced the path re-computation frequency compared to the benchmark metric. This means that more stable nodes were used to route data. The time-based routing metrics generally performed well across the different node mobility scenarios used. We also noted a variation on the performance of the metrics, including the benchmark metric, under different mobility models, due to the differences in the node mobility governing rules of the models.
Os paradigmas recentes de arquiteturas de comunicação sem fios consistem em ambientes onde os dispositivos apresentam um comportamento dinâmico (e.g., Redes Centradas no Utilizador). Nestes ambientes, o encaminhamento de dados ainda é realizado com base no comportamento de armazenamento e encaminhamento da comutação clássica de pacotes. Embora seja suficiente para calcular, pelo menos, um caminho adequado entre uma origem e um destino, tal comportamento de encaminhamento não é adequado nas redes móveis e sem fios atuais. Esta tese tem como objetivo analisar o impacto da mobilidade dos utilizadores sobre os diferentes cenários de encaminhamento. A tese também visa o desenvolvimento de conceitos de encaminhamento que ajudam na distribuição de dados através de grafos, nos quais os vértices exibem padrões de mobilidade humana, como é o caso hoje em dia para a maior parte das redes sem fios centradas no utilizador. A primeira parte desta tese envolveu a análise do impacto da mobilidade dos utilizadores no encaminhamento, com a análise de que a mobilidade, para afetar o desempenho do encaminhamento, depende do comprimento do caminho entre a origem e o destino, da distância entre os dispositivos, e dos diferentes padrões de mobilidade. O estudo dos atuais parâmetros de mobilidade mostrou que eles capturam parcialmente a mobilidade dos utilizadores. A robustez dos protocolos de encaminhamento depende da sensibilidade das métricas no que concerne a esta mobilidade. Assim, foram concebidas métricas de encaminhamento baseadas na mobilidade dos utilizadores para aumentar a robustez do encaminhamento em relação à mobilidade. As duas categorias de métricas de encaminhamento criadas foram métricas que têm como base o tempo e a correlação espacial. Para a validação das métricas foram utilizados vários modelos de mobilidade, incluindo os modelos que imitam padrões de mobilidade humana. As métricas foram implementadas utilizando a ferramenta Network Simulator e considerando dois protocolos de encaminhamento por múltiplos saltos amplamente utilizados, o Optimized Link State Routing (OLSR) e o Adhoc On Demand Distance Vector (AODV). Com a utilização das métricas propostas observa-se que a frequência de realização de novos cálculos de caminhos de comunicação foi reduzida em relação à métrica de referência. Isto significa que foram usados caminhos mais estáveis para encaminhar dados. As métricas de encaminhamento baseadas no tempo apresentam geralmente um bom desempenho nos diferentes cenários de mobilidade utilizados. Observou-se também uma variação no desempenho das métricas, incluindo a métrica de referência, nos diferentes modelos de mobilidade considerados, devido a diferenças nas regras de mobilidade dos utilizadores dos diferentes modelos.
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Ben, Jemaa Inès. "Communication multicast pour les systèmes véhiculaires coopératifs". Thesis, Paris, ENMP, 2014. http://www.theses.fr/2014ENMP0065/document.
Abstract (sommario):
La communication véhiculaire permet le développement de nouvelles applications multicast émergentes telles que la gestion de la flotte et la distribution des Points d'Intérêt (POI). Ces deux catégories d'applications nécessitent une communication multicast de l'Internet vers les réseaux véhiculaires (VANET). Afin de mettre en place une communication multicast adaptée au contexte de la communication Internet-vers-réseaux véhiculaires, notre travail traite de deux aspects différents. Tout d'abord, l'accessibilité des véhicules en mouvement au service Internet et en deuxième lieu, la dissémination du message dans les VANET. Nous introduisons un schéma d'adressage multicast basé sur les coordonnées géographiques des véhicules qui leur permet de s'auto-configurer d'une façon dynamique sans aucun besoin d'échanger des messages de signalisation avec Internet. Nous proposons aussi une approche simplifiée de gestion de la mobilité des véhicules dans le cadre des architectures Mobile IP et Proxy Mobile IP. Le but de cette approche est d'optimiser l'échange des messages avec les entités responsables de la gestion de la mobilité dans Internet. Afin d'étudier les mécanismes de dissémination appropriés aux applications de gestion de flottes, nous nous proposons de revisiter les techniques de routage multicast traditionnelles basées sur une structure de diffusion en arbre. Pour cela, nous étudions leur application aux réseaux véhiculaires. Nous présentons une étude théorique portant sur la durée de vie des liens entre les véhicules en milieux urbains. Ensuite, en utilisant la simulation, nous étudions l'application de Multicast Adhoc On Demand Vector, MAODV et proposons Motion-MAODV, une version adaptée de MAODV qui a pour objectif d'établir des routes plus robustes Enfin, concernat la dissémination multicast géolocalisée dans les applications POI, nous proposons le protocole de routage Melody qui permet une diffusion geocast en milieu urbain. A partir de simulations, nous constatons que, comparé aux protocoles de géo-brodcasting dans les milieux urbain très denses, Melody assure plus de fiabilité et d'efficacité lors de l'acheminement des données vers les zones géographiques de destinationVehicular communications allow emerging new multicast applications such as fleet management and point of interest (POI). Both applications require Internet-to-vehicle multicasting. These approaches could not be applied to vehicular networks (VANET) due to their dynamic and distributed nature. In order to enable such multicasting, our work deals with two aspects. First, reachability of the moving vehicles to the multicast service and second, multicast message dissemination in VANET. We introduce first a self-configuring multicast addressing scheme that allows the vehicles to auto-configure a dynamic multicast address without a need to exchange signalling messages with the Internet. Second, we propose a simplified approach that extends Mobile IP and Proxy Mobile IP. This approach aims at optimizing message exchange between vehicles and entities responsible for managing their mobility in Internet. To study the dissemination mechanisms that are suitable for fleet management applications, we propose to revisit traditional multicast routing techniques that rely on a tree structure. For this purpose, we study their application to vehicular networks. In particular, as vehicular networks are known to have changing topology, we present a theoretical study of the link lifetime between vehicles in urban environments. Then, using simulations, we study the application of Multicast Adhoc On Demand Vector, MAODV. We propose then Motion-MAODV, an improved version of MAODV that aims at enhancing routes built by MAODV in vehicular networks and guarantee longer route lifetime. Finally, to enable geographic dissemination as required by POI applications, we propose a routing protocol Melody that provides a geocast dissemination in urban environments. Through simulations, Melody ensures more reliable and efficient packet delivery to a given geographic area compared to traditional geo-brodcasting schemes in highly dense scenarios
8
Saint-Guillain, Michael. "Models and algorithms for online stochastic vehicle routing problems". Thesis, Lyon, 2019. http://www.theses.fr/2019LYSEI068.
Abstract (sommario):
Quels seront les objectifs et défis des métropoles de demain ? La plupart des problèmes issus du monde réel sont sujets à l'inconnu, nécessitant de prendre de nouvelles décisions de façon dynamique, à la demande, en fonction des évènements aléatoires qui se réalisent. Dans cette thèse, nous nous attaquons à un problème majeur, du moins en perspectives: la gestion dynamique d'une flotte de véhicules en contexte urbain. Les applications pratiques des tournées de véhicules à la demande sont nombreuses, incluant les transports publics intelligents, les services de livraison, les soins et interventions à domicile, etc. Étant donnés une flotte de véhicules et un ensemble de clients, chacun pouvant potentiellement et à tout moment émettre une requête nécessitant une intervention, l'objectif de cette thèse est de fournir une réponse à la question suivante. Étant donné l'état courant à un moment donné, comment gérer notre flotte de véhicules afin de maximiser l'espérance du nombre total de requêtes satisfaites à la fin de la journée ? Ou encore, comment minimiser l'espérance du délai moyen d'intervention de nos véhicules ? Bien entendu, la difficulté réside en ce que la plupart des requêtes, avant d'apparaître dynamiquement, ne sont pas connues. Pour chaque problème, nous considérons qu'il nous est fourni une connaissance, sous forme d'information probabiliste, telle que la probabilité qu'une requête apparaisse à un certain endroit, et à un certain moment de la journée. Grâce à des techniques issues de la recherche opérationnelle et de la programmation stochastique, nous sommes en mesure de construire et résoudre des modèles calculant les actions anticipatives les plus adéquates, comme le redéploiement préventif des véhicules, minimisant le coût total espéré, ou encore maximisant la qualité de service. La question de l'optimisation sous incertitude se pose depuis déjà plusieurs décennies. Grâce aux avancées à la fois théoriques et technologiques, nous sommes chaque jour un peu plus en mesure de palier à l'inconnu. Cependant, la plupart des problèmes intéressants restent extrêmement difficiles à résoudre, si ce n'est impossible. Il reste beaucoup à faire. Cette thèse explore certains concepts fondamentaux de l'optimisation sous incertitude. En intégrant une composante stochastique aux modèles à optimiser, nous verrons ensemble comment il est en effet possible de créer de l'anticipationWhat will be tomorrow's big cities objectives and challenges? Most of the operational problems from the real world are inherently subject to uncertainty, requiring the decision system to compute new decisions dynamically, as random events occur. In this thesis, we aim at tackling an important growing problem in urban context: online dynamic vehicle routing. Applications of online vehicle routing in the society are manyfold, from intelligent on demand public transportation to sameday delivery services and responsive home healthcare. Given a fleet of vehicles and a set of customers, each being potentially able to request a service at any moment, the current thesis aims at answering the following question. Provided the current state at some moment of the day, which are the best vehicle actions such that the expected number of satisfied requests is maximized by the end of the operational day? How can we minimize the expected average intervention delays of our mobile units? Naturally, most of the requests remain unknown until they appear, hence being revealed online. We assume a stochastic knowledge on each operational problem we tackle, such as the probability that customer request arise at a given location and a given time of the day. By using techniques from operations research and stochastic programming, we are able to build and solve mathematical models that compute near-optimal anticipative actions, such as preventive vehicle relocations, in order to either minimize the overall expected costs or maximize the quality of service. Optimization under uncertainty is definitely not a recent issue. Thanks to evolution of both theoretical and technological tools, our ability to face the unknown constantly grows. However, most of the interesting problems remain extremely hard, if not impossible, to solve. There is still a lot of work. Generally speaking, this thesis explores some fundamentals of optimization under uncertainty. By integrating a stochastic component into the models to be optimized, we will see how it is in fact possible to create anticipation
9
Cho, Gi Hwan. "Location and routing optimization protocols supporting internet host mobility". Thesis, University of Newcastle Upon Tyne, 1996. http://hdl.handle.net/10443/2105.
Abstract (sommario):
With the popularity of portable computers and the proliferation of wireless networking interfaces, there is currently a great deal of interest in providing IP networking support for host mobility using the Internet as a foundation for wireless networking. Most proposed solutions depend on a default route through the mobile host's horne address, which makes for unnecessarily long routes. The major problem that this gives rise to is that of finding an efficient way of locating and routing that allows datagrams to be delivered efficiently to moving destinations whilst limiting costly Internet-wide location updates as much as possible. Two concepts - "local region" and "patron service" - are introduced based on the locality features of the host movement and packet traffic patterns. For each mobile host, the local region is a set of designated subnetworks within which a mobile host often moves, and the patrons are the hosts from which the majority of traffic for the mobile host originated. By making use of the hierarchical addressing and routing structure of Internet, the two concepts are used to confine the effects of a host moving, so location updates are sent only to a designated host moving area and to those hosts which are most likely to call again, thus providing nearly optimal routing for most communication. The proposed scheme was implemented as an IP extension using a network simulator and evaluated from a system performance point of view. The results show a significant reduction in the accumulated communication time along with improved datagram tunneling, as compared with its extra location overhead. In addition, a comparison with another scheme shows that our functionality is more effective both for location update and routing efficiency. The scheme offers improved network and host scalability by isolating local movement from the rest of the world, and provides a convenient point at which to perform administration functions.
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Alchaita, Mohammed Husein. "Routing and mobility strategies for mobile ad hoc networks". Thesis, De Montfort University, 2006. http://hdl.handle.net/2086/4289.
Libri sul tema "Routines de mobilité":
1
Kuiper, Erik. Mobility and routing in a delay-tolerant network of unmanned aerial vehicies. Linko ping: Department of Computer and Information Science, Linko pings universitet, 2008.
2
Moghadam, Arezu M. Application Platforms, Routing Algorithms and Mobility Behavior in Mobile Disruption-Tolerant Networks. [New York, N.Y.?]: [publisher not identified], 2011.
3
ECMT Seminar (1989 Dunkerque, France). Transport for people with mobility handicaps: Public transport by bus : ECMT Seminar, Dunkirk, 29th November, 1989. Paris, France: E.C.M.T., 1991.
4
Millie, Julian. A Feminized Domain. Cornell University Press, 2018. http://dx.doi.org/10.7591/cornell/9781501713118.003.0007.
Abstract (sommario):
Chapter Seven contrasts a feminist critique of women’s routines of listening and learning with the characteristic patterns of women’s spectatorship that women display in those routines. Bandung’s women live under constraints affecting their social expectations and mobility. The chapter argues that they enjoy preaching in forms deliberately shaped by preachers to accommodate their situations. The resulting listening experience is not a disciplinary one, but one that respects women’s life conditions.
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Herget, Melanie. Mobilität Von Familien Im ländlichen Raum: Arbeitsteilung, Routinen und Typische Bewältigungsstrategien. Springer Vieweg. in Springer Fachmedien Wiesbaden GmbH, 2015.
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Herget, Melanie. Mobilität von Familien im ländlichen Raum: Arbeitsteilung, Routinen und typische Bewältigungsstrategien. Springer VS, 2015.
7
Nelson, Arnold G., e Jouko Kokkonen. Stretching Anatomy. 3a ed. Human Kinetics, 2021. http://dx.doi.org/10.5040/9781718225633.
Abstract (sommario):
Get on the path to increased flexibility and improved muscular strength! With more than 450,000 copies sold worldwide, Stretching Anatomy, Third Edition, is your go-to guide for seeing inside the stretches that will help you increase range of motion, supplement training, enhance recovery, and maximize efficiency of movement. Stretching Anatomy takes you inside every stretch with highly detailed, hand-drawn illustrations depicting proper technique as well as the activated muscles, joints, and surrounding structures. Each stretch includes step-by-step instructions on how to perform the stretch, the names of the muscles stretched, and Stretch Notes detailing the procedures and benefits of the exercise, safety considerations, and variations for increasing or decreasing difficulty. In this third edition, you’ll also find suggested programs for daily mobility and flexibility, which are ideal for people who sit or stand for extended periods, as well as a program proven to help lower blood glucose. In addition, you’ll find stretching routines for 23 sports, which are designed to improve flexibility, maximize efficiency of movement, and enhance recovery from training and competition. If tight hips, frozen shoulder, limited neck mobility, leg cramps, arthritis, or general muscle soreness are conditions you’re all too familiar with, use Stretching Anatomy, Third Edition, to develop a regular stretching routine to help you move and feel better.
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Broussal-Derval, Aurélien, e Stéphane Ganneau. The Modern Art and Science of Mobility. Human Kinetics, 2020. http://dx.doi.org/10.5040/9781718214606.
Abstract (sommario):
The Modern Art and Science of Mobility is a striking visual guide to releasing muscle tension and activating muscles for functional motion. It goes beyond traditional training methods that focus on performance and aesthetics and asks these simple questions: Are you truly reaping the full benefits of training if it does not include mobility exercises? Why are the vast majority of people, even the most athletic individuals, unable to perform basic motor tasks without pain or difficulty? Why are physically active people still dealing with lack of mobility and chronic injury? Whether you are a casual exerciser or an elite athlete, you will learn how to preserve and maintain your body with over 300 exercises designed to improve mobility, facilitate recovery, reduce pain, and activate muscles. Utilize the self-tests to assess your current level of mobility, and then choose from over 50 prescriptive training routines that can be used as is or customized to target specific functional chains. You’ll find exercise recommendations based on body region, activity, and primary goal, and you’ll learn to incorporate a variety of techniques and popular equipment, including resistance bands, foam rollers, massage balls, and stability balls. The Modern Art and Science of Mobility provides a stunning visual presentation with over 1,200 photos and 100 original illustrations by Stéphane Ganneau. His illustrations highlight the muscles with precision, and his avant-garde style and the harmony of colors give this book a unique graphic signature. Mobility is the foundation for training your best and feeling your best. The Modern Art and Science of Mobility will help you do just that by helping you to alleviate pain, improve posture, and release muscle tension for a more comfortable and enjoyable quality of life.
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Ross, Morris. 6-Minute Chair Exercises for Seniors: Daily Routines to Build Balance, Improve Posture, Mobility, Energy, Relieve Back Pain and Prevent Fall. Independently Published, 2022.
10
Adams, Jackie. Pilates for the Expectant Mom: The Essential Pilates Workout Routine for Improved Strength and Mobility Before and after Delivery. Independently Published, 2022.
Capitoli di libri sul tema "Routines de mobilité":
1
Nguyen, Hoang Nam. "Mobility Management". In Routing and Quality-of-Service in Broadband LEO Satellite Networks, 73–112. Boston, MA: Springer US, 2003. http://dx.doi.org/10.1007/978-1-4615-0249-4_4.
2
Hristea, Cristina, e Fouad Tobagi. "IP Routing and Mobility". In Lecture Notes in Computer Science, 279–94. Berlin, Heidelberg: Springer Berlin Heidelberg, 2001. http://dx.doi.org/10.1007/3-540-45400-4_19.
3
Pierik, Bob. "From Microhistory to Patterns of Urban Mobility: The Rhythm of Gendered Mobility in Eighteenth-Century Amsterdam". In Daily Lives and Daily Routines in the Long Eighteenth Century, 105–24. New York: Routledge, 2021. http://dx.doi.org/10.4324/9780429317583-8.
4
Hong, Xiaoyan, e Bo Gu. "Identifying the Intertwined Links Between Mobility and Routing in Opportunistic Networks". In Routing in Opportunistic Networks, 1–26. New York, NY: Springer New York, 2013. http://dx.doi.org/10.1007/978-1-4614-3514-3_1.
5
Mietzsch, Oliver. "Öffentliche Mobilität finanzieren: Plädoyer für ein neues Verständnis der Mobilitätsfinanzierung im öffentlichen Verkehr". In Öffentliche Mobilität, 211–37. Wiesbaden: Springer Fachmedien Wiesbaden, 2021. http://dx.doi.org/10.1007/978-3-658-32106-2_9.
Abstract (sommario):
ZusammenfassungMit der Herausbildung integrativer Planungsansätze zur besseren Erfassung des Phänomens stellt sich nicht nur die Frage nach geeigneten Messinstrumenten zur Beschreibung der Komplexität der Bewegung von Menschen in Raum und Zeit. Vielmehr ergeben sich daraus auch gänzlich neue Anforderungen an den Bereich der Governance, d. h. die immateriellen und materiellen Rahmenbedingungen von Mobilität. Zu den immateriellen Rahmenbedingungen gehören die im historischen Kontext verorteten ethischen Begründungen für die Organisation von Mobilität ebenso wie die daraus entstandenen Handlungsmuster und Routinen, d. h. die Mobilitätskultur (siehe den Beitrag von Hoor in diesem Band).
6
Fatima, Lakrami, e Elkamoun Najib. "Mobility Support in OLSR Routing Protocol". In Communications in Computer and Information Science, 804–12. Berlin, Heidelberg: Springer Berlin Heidelberg, 2012. http://dx.doi.org/10.1007/978-3-642-35211-9_102.
7
Liu, Endong, e Yue Cao. "Routing Protocols in Vehicular and Aerial Delay Tolerant Networks". In Secure and Digitalized Future Mobility, 155–79. Boca Raton: CRC Press, 2022. http://dx.doi.org/10.1201/b22998-9.
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Sarafijanovic-Djukic, Natasa, e Matthias Grossglauser. "Last Encounter Routing under Random Waypoint Mobility". In Lecture Notes in Computer Science, 974–88. Berlin, Heidelberg: Springer Berlin Heidelberg, 2004. http://dx.doi.org/10.1007/978-3-540-24693-0_80.
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Javaid, Usman, e Francine Krief. "Routing and Mobility Management in Personal Networks". In Communicating Embedded Systems, 301–20. Hoboken, NJ USA: John Wiley & Sons, Inc., 2013. http://dx.doi.org/10.1002/9781118557624.ch10.
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Lanzendorf, Martin. "The Same Procedure as Last Weekend: Routines and Leisure Mobility". In Advances in Spatial Science, 123–45. Berlin, Heidelberg: Springer Berlin Heidelberg, 2004. http://dx.doi.org/10.1007/978-3-540-24827-9_7.
Atti di convegni sul tema "Routines de mobilité":
1
Marques, Vinícius De Figueiredo, e Janine Kniess. "Mobility Aware RPL (MARPL): Providing Mobility Support for RPL Protocol". In XXXVII Simpósio Brasileiro de Redes de Computadores e Sistemas Distribuídos. Sociedade Brasileira de Computação - SBC, 2019. http://dx.doi.org/10.5753/sbrc.2019.7361.
Abstract (sommario):
Low Power and Lossy Networks (LLNs) is a common type of wireless network in IoT applications. LLN communication patterns usually requires an efficient routing protocol. The IPv6 Routing Protocol for Low-Power and Lossy Network (RPL) is considered to be a possible standard routing protocol for LLNs. However, RPL was developed for static networks and node mobility decreases RPL overall performance. These are the purposes of the Mobility Aware RPL (MARPL), presented in this paper. MARPL provides a mobility detection mechanism based on neighbor variability. Performance evaluation results on the Cooja Simulator confirm the effectiveness of MARPL regarding link disconnection prevention, packet delivery rate and fast mobile node topology reconnection with low overhead impact when compared to other protocols.
2
DeGroot, Don J., ZJ Westgate e T. I. Yetginer-Tjelta. "Geological and Geotechnical Challenges of the East Coast United States for Offshore Energy Transition". In Innovative Geotechnologies for Energy Transition. Society for Underwater Technology, 2023. http://dx.doi.org/10.3723/cbkb5668.
Abstract (sommario):
Offshore wind integrated site characterisation work being conducted at US East Coast lease areas relies on experiences gained in the European market although several unique challenges are emerging. Significant layering and spatial variability of soil units, boulders to the north, and calcareous soils to the south, and sediment mobility and scour each present challenges to ground model development. Furthermore, one of the more pressing challenges in the region is glauconite. This iron potassium mica characterises as a sand but transforms into a fine-grained soil upon shearing due to particle crushing. CPTu data show unique signatures of soil behaviour creating significant uncertainty for pile drivability analyses. Even routine soil index and classification testing is problematic. The paper covers the geologic history of the region and presents examples from site investigation work and research that highlight these geotechnical challenges and how they relate to foundation selection and cable routing.
3
Santos, Bruno Pereira, Luiz Filipe Menezes Vieira e Antonio Alfredo Ferreira Loureiro. "Routing and Mobility Management in the Internet of Things". In XXXVIII Simpósio Brasileiro de Redes de Computadores e Sistemas Distribuídos. Sociedade Brasileira de Computação, 2020. http://dx.doi.org/10.5753/sbrc_estendido.2020.12415.
Abstract (sommario):
This Ph.D. Thesis proposes new techniques for routing and mobility management for Internet of Things (IoT). In the future IoT, everyday mobile objects will probably be connected to the Internet. Currently, static IoT's devices have already been connected, but handle mobile devices suitably still being an open issue in IoT context. Then, solutions for routing mobility detection, handover, and mobility management are proposed through an algorithm that integrates Machine Learning (ML) and mobility metrics to figure out devices' mobility events, which we named Dribble. Also, an IPv6 hierarchical routing protocol named Mobile Matrix to boost efficient (memory and fault tolerance) end-to-end connectivity over mobility scenarios. The Thesis contributions are supported by numerous peer-reviewed publications in national and international conferences and journals included in ISI-JCR. Also, the applicability of this Thesis is evident by showing that our results overcome state-of-the-art in static and mobile scenarios, as well as, the impact of the proposed solutions is a step forward in at least two new research areas so-called Internet of Mobile Things (IoMT) and Social IoT, where devices move around and do social ties respectively. Moreover, during the Ph.D. degree, the author has contributed to different computer network fields rather than routing by publishing in areas like social networks, smart cities, intelligent transportation systems, software-defined networks, and parallel computing.
4
Lee, Jung Woo, Branislav Kusy, Tahir Azim, Basem Shihada e Philip Levis. "Whirlpool routing for mobility". In the eleventh ACM international symposium. New York, New York, USA: ACM Press, 2010. http://dx.doi.org/10.1145/1860093.1860112.
5
Qin, Liang, e Thomas Kunz. "Mobility Metrics for Adaptive Routing". In 2006 3rd Annual IEEE Communications Society on Sensor and Ad Hoc Communications and Networks. IEEE, 2006. http://dx.doi.org/10.1109/sahcn.2006.288564.
6
Motoyoshi, Gen, Kenji Leibnitz e Masayuki Murata. "MTFR: Mobility Tolerant Firework Routing". In 2011 30th IEEE Symposium on Reliable Distributed Systems Workshops. IEEE, 2011. http://dx.doi.org/10.1109/srdsw.2011.12.
7
Friedman, Roy. "Session details: Routing and mobility". In MobiHoc '09: The Tenth ACM International Symposium on Mobile Ad Hoc Networking and Computing. New York, NY, USA: ACM, 2009. http://dx.doi.org/10.1145/3256925.
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Hossain, Md Shohrab, Mohammed Atiquzzaman e William Ivancic. "Cost analysis of mobility management entities for SIGMA". In 2010 International Conference on High Performance Switching and Routing (HPSR). IEEE, 2010. http://dx.doi.org/10.1109/hpsr.2010.5580257.
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Walecki, W. J., D. Some, V. G. Kozlov e A. V. Nurmikko. "Terahertz optoelectronic techniques as probes of electrons in semiconductor quantum wells". In OSA Annual Meeting. Washington, D.C.: Optica Publishing Group, 1993. http://dx.doi.org/10.1364/oam.1993.mbb.3.
Abstract (sommario):
While the application of conventional transport measurements to a high mobility electron gas in a quantum well is routine, there is a notable absence of high speed, real-time techniques to study directly dynamical effects on ultrafast timescale.
10
Eido, Souheir, Pratibha Mitharwal, Annie Gravey e Christophe Lohr. "MPTCP solution for seamless local SIPTO mobility". In 2015 IEEE 16th International Conference on High-Performance Switching and Routing (HPSR). IEEE, 2015. http://dx.doi.org/10.1109/hpsr.2015.7483099.
Rapporti di organizzazioni sul tema "Routines de mobilité":
1
Bennett, Patrick, Kai Liu e Kjell Salvanes. The Decline of Routine Tasks, Education Investments, And Intergenerational Mobility. W.E. Upjohn Institute, marzo 2023. http://dx.doi.org/10.17848/wp23-382.
2
Jeon, S., e Y. Kim. Multicast Mobility Routing Optimizations for Proxy Mobile IPv6. RFC Editor, settembre 2013. http://dx.doi.org/10.17487/rfc7028.
3
Rehrer, Sarah, Andrew Griffin e Matthew Renner. Cross country mobility (CCM) modeling using triangulated irregular networks (TIN). Engineer Research and Development Center (U.S.), novembre 2022. http://dx.doi.org/10.21079/11681/46082.
Abstract (sommario):
Cross country mobility (CCM) models terrain that has insufficient or unavailable infrastructure for crossing. This historically has been done with either hand-drawn and estimated maps or with raster-based terrain analysis, both of which have their own strengths and weaknesses. In this report the authors explore the possibility of using triangulated irregular networks (TINs) as a means of representing terrain characteristics used in CCM and discuss the possibilities of using such networks for routing capabilities in lieu of a traditional road-based network. The factors used to calculate CCM are modified from previous methods to capture a more accurate measurement of terrain characteristics. Using a TIN to store and represent CCM information achieves comparable results to raster cost analysis with the additional benefits of an integrated network useful for visualization and routing and a reduction in the number of related files. Additionally, TINs can in some cases more accurately show the contours of the landscape and reveal feature details or impediments that may be lost within a raster, thus improving the quality of CCM overlays.
4
Mahmassani, Hani, Christopher Cummings, Vasileios Volakakis, Laurence Audenaerd e Jessica De La Paz. Advancing Air Mobility in Illinois. Illinois Center for Transportation, febbraio 2024. http://dx.doi.org/10.36501/0197-9191/24-006.
Abstract (sommario):
Advanced air mobility (AAM) is a nascent market within the aviation sector of Illinois’ transportation system, promising enhanced movement of people and cargo to previously inaccessible or underserved locations. This project addresses AAM’s prospects and impacts in the state. The research encompasses several tasks, starting with an examination of the current and projected state of the AAM industry, including pertinent regulations, technology advancements, and key industry players. Task two involves identifying the potential scale, operational profiles, and safety considerations of AAM within Illinois. Task three addresses the diverse geographic and operational environments across the state, encompassing urban, suburban, rural, intra-regional, and inter-regional areas, as well as congested and uncongested airspace. Moreover, the project aims to explore how AAM may influence Illinois’ overall transportation system, including surface and aviation components. The surface transportation system aspect involves investigating potential vehicular traffic impacts, shifts, and reductions, while the aviation system aspect includes assessing the interaction with unmanned aircraft systems, helicopters, and low-level traffic as well as airport access and routing considerations. Enabling infrastructure and facility requirements, such as communication, surface transportation access, landing facilities, power and fuel availability, and utilities, are identified in task five. Subsequently, state-level policy and regulatory recommendations, aligned with federal and state statutes, are developed in task six, considering the Illinois Aviation System Plan. Last, the research provides a high-level assessment of potential impacts, encompassing economic, social, and environmental aspects. The project’s outcomes are expected to enhance Illinois Department of Transportation’s preparedness for AAM implementation, contributing to the progressive integration of this transformative aviation technology within the state’s transportation landscape.
5
Jung, Paul H., Jean-Claude Thill e Luis Armando Galvis-Aponte. State Failure, Violence, and Trade: Dangerous Trade Routes in Colombia. Banco de la República, dicembre 2021. http://dx.doi.org/10.32468/dtseru.303.
Abstract (sommario):
We investigate the effect of domestic armed violence brought about by political instability on the geography of distance frictions in freight mobility and the resulting differential access of regions to global markets. The Colombian transportation system has been found to be impeded by deficiencies in landside transport infrastructure and institutions, and by fragmented political environments. The micro-level analysis of U.S.-bounded export shipping records corroborates that export freight shipping from inland regions is re-routed to avoid exposures to domestic armed violence despite greatly extended landside and maritime shipping distances. We exploit the trajectories of freight shipping from Colombian regions and spatial patterns of violent armed conflicts to see how unstable geopolitical environments are detrimental to freight shipping mobility and market openness. The discrete choice model shows that the shipping flow is greatly curbed by the extended re-routing due to domestic armed violence and that inland regions have restricted access to the global market. The perception of risk and re-routing behavior is found heterogeneous across shipments and conditional to shipment characteristics, such as commodity type, freight value and shipper sizes. The results highlight that political stability must be accommodated for improved freight mobility and export-oriented economic development in the global South.
6
Lewis, Sherman, Emilio Grande e Ralph Robinson. The Mismeasurement of Mobility for Walkable Neighborhoods. Mineta Transportation Institute, novembre 2020. http://dx.doi.org/10.31979/mti.2020.2060.
Abstract (sommario):
The major US household travel surveys do not ask the right questions to understand mobility in Walkable Neighborhoods. Yet few subjects can be more important for sustainability and real economic growth based on all things of value, including sustainability, affordability, and quality of life. Walkable Neighborhoods are a system of land use, transportation, and transportation pricing. They are areas with attractive walking distances of residential and local business land uses of sufficient density to support enough business and transit, with mobility comparable to suburbia and without owning an auto. Mobility is defined as the travel time typically spent to reach destinations outside the home, not trips among other destinations that are not related to the home base. A home round trip returns home the same day, a way of defining routine trips based on the home location. Trip times and purposes, taken together, constitute travel time budgets and add up to total travel time in the course of a day. Furthermore, for Walkable Neighborhoods, the analysis focuses on the trips most important for daily mobility. Mismeasurement consists of including trips that are not real trips to destinations outside the home, totaling 48 percent of trips. It includes purposes that are not short trips functional for walk times and mixing of different trips into single purposes, resulting in even less useful data. The surveys do not separate home round trips from other major trip types such as work round trips and overnight trips. The major household surveys collect vast amounts of information without insight into the data needed for neighborhood sustainability. The methodology of statistics gets in the way of using statistics for the deeper insights we need. Household travel surveys need to be reframed to provide the information needed to understand and improve Walkable Neighborhoods. This research makes progress on the issue, but mismeasurement prevents a better understanding of the issue.
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Elliott, Jane, Maureen Muir e Judith Green. Trajectories of everyday mobility at older age. Wellcome Centre for Cultures and Environments of Health, gennaio 2023. http://dx.doi.org/10.58182/bnec3269.
Abstract (sommario):
Background: This review and exploratory data analysis focuses on everyday mobility at older age; that is, travel outside the house for routine activities. Everyday mobility is an important determinant of health and wellbeing. Although there can be physiological reasons for declines in an individual’s capacity for mobility, trajectories are uneven. A social model of mobility at older age assumes that impairments due to bodily ageing do not inevitably lead to reduced mobility, and that policy and environmental interventions (such as transport provision, quality of built environment) can and should support mobile later lives. We scope the potential for a study of the conditions which foster trajectories of maintained or increased mobility over time, in an equitable way. Aims: With a focus on corporeal mobility in the UK (in particular England), and on social and environmental, rather than physiological factors, our aims were to: 1) scope the existing evidence on trajectories of mobility at older age; 2) assess the English Longitudinal Study of Ageing (ELSA) as a possible source of data on changes in mobility over time; 3) outline the potential for further research through identifying candidate analytical approaches and; draft an initial logic model to inform a study. Literature review findings: Literature on mobility at older age documents physiological, lifecourse, social, and environmental factors that shape trajectories of declining mobility, and the health and wellbeing consequences. There are complex and bidirectional relationships between determinants and consequences of mobility. Points of disruption in the lifecourse are points where mobility practices may change and are therefore potential points for interventions to promote greater mobility. A body of research demonstrates this through the case of concessionary bus travel for older adults in the UK, which both promotes greater mobility and appears to improve health status. There is a more mixed body of research on the environmental factors that can foster greater mobility: more research is needed on how to support mobility in place in the UK, particularly in settings outside urban centres. Compared to research on physiological factors, there is a relative dearth of evidence on population level interventions, with the exception of free bus travel. ELSA summary: The main strength of using the ELSA for understanding what influences trajectories of everyday mobility is that it is an eighteen-year longitudinal study with data collection every two years, focussing on those aged 50 and over. The sample is drawn from across England, detailed contextual information is available via linked geographical identifiers, and longitudinal and cross-sectional weights enable adjustment of the sample for non-response and attrition. The weaknesses (for studies of mobility) are the lack of fine-grained measures of ‘ability’ for many mobility indicators and the potential for reporting biases that intersect with measures of social and cultural capital. In this descriptive analysis, we document six separate measures of everyday mobility that can be derived from ELSA data, and map these to our logic model. Implications: The review identified the potential for studying the conditions for mobility at older age that could help identify and develop population level interventions. Focusing on points of disruption in the lifecourse is a potentially fruitful and tractable area of investigation. We have mapped indicators available from ELSA as a foundation for future study, and as a resource for other researchers. ELSA has some disadvantages for a study, but also many strengths. Given the complexity of causal pathways linking different conditions for maintained or increased mobility, an analysis approach directed specifically at multiple pathways (such as Qualitative Comparative Analysis) could well be fruitful."
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Chen, Xin, Yanfeng Ouyang, Ebrahim Arian, Haolin Yang e Xingyu Ba. Modeling and Testing Autonomous and Shared Multimodal Mobility Services for Low-Density Rural Areas. Illinois Center for Transportation, agosto 2022. http://dx.doi.org/10.36501/0197-9191/22-013.
Abstract (sommario):
Recent developments in transformative technologies hold the promise to provide holistic solutions for affordable transportation services to rural areas and thus greatly alleviate existing social inequality through efficient planning and management of complex transportation systems and systemwide interactions among multiple modes. To realize the promise, many challenging research questions need to be addressed, which often leads to computationally intractable, large-scale, dynamic/stochastic, discrete optimization models. This project proposes to address some of the challenges by building a series of holistic and tractable models on the design of mobility services, capacity planning, dynamic matching, and routing, as well as pricing. The proposed project is expected to create a new series of planning and management models that can support strategical and operational decisions for large-scale autonomous and shared mobility systems in rural areas. The planned case study and simulation for the Village of Rantoul, Illinois, will lay the foundation for future field implementation.
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Lißner, Sven, Stefan Huber e Maike von Harten. Influence of the cycling campaign CITY CYCLING on cycling behaviour in Germany. TU Dresden, Fakultät Verkehrswissenschaften 'Friedrich List', 2023. http://dx.doi.org/10.26128/2023.65.
Abstract (sommario):
The CITY CYCLING (STADTRADELN) campaign has been running since 2008 to motivate German citizens to use the bicycle for daily mobility routines. In the course of the MOVEBIS research project, nationwide GPS data of the CITY CYCLING participants were collected in the years 2018-2020 and were processed for planning purposes. This contribution addresses the question to which extent the participants in the CITY CYCLING campaign represent cyclists in the Federal Republic of Germany and whether the motivation during the campaign leads to a significant change in mobility behaviour. For this purpose, more than 73,000 complete questionnaires of campaign participants from a survey in the year 2020 were evaluated. The age and gender distribution of app users and non-users of the campaign are corresponding to those of cyclists from representative household surveys in Germany (MiD 2017). App users and non app users differ only insignificantly from each other and are, on average, rather older than in the cycling participants of nationwide MiD survey. The results reveal that the smartphone has no significant influence on the cycling behaviour of the users. The survey participants are regular cyclists. Around 88% of the respondents use the bicycle most frequently in everyday life, followed by the private car (national average) and public transport (in large cities). The influence of the campaign on the level of utilisation or the number of kilometres travelled by bike can be described as rather low, overall. Whereas 65% of the participants stated that they cycled to work just as often as outside the campaign period, 19% of the respondents used the bicycle less often for commuting and 16% more often. The results indicate that the CITY CYCLING campaign captures and represents the everyday transport behaviour of participants. During the COVID-19 pandemic, participants used their bicycles significantly more often (73%). The perception of safety is consistently high. The campaign was rated very positively and the majority of users (91%) would participate again or rather recommend the campaign to others (78%).
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Blundell, S. Micro-terrain and canopy feature extraction by breakline and differencing analysis of gridded elevation models : identifying terrain model discontinuities with application to off-road mobility modeling. Engineer Research and Development Center (U.S.), aprile 2021. http://dx.doi.org/10.21079/11681/40185.
Abstract (sommario):
Elevation models derived from high-resolution airborne lidar scanners provide an added dimension for identification and extraction of micro-terrain features characterized by topographic discontinuities or breaklines. Gridded digital surface models created from first-return lidar pulses are often combined with lidar-derived bare-earth models to extract vegetation features by model differencing. However, vegetative canopy can also be extracted from the digital surface model alone through breakline analysis by taking advantage of the fine-scale changes in slope that are detectable in high-resolution elevation models of canopy. The identification and mapping of canopy cover and micro-terrain features in areas of sparse vegetation is demonstrated with an elevation model for a region of western Montana, using algorithms for breaklines, elevation differencing, slope, terrain ruggedness, and breakline gradient direction. These algorithms were created at the U.S. Army Engineer Research Center – Geospatial Research Laboratory (ERDC-GRL) and can be accessed through an in-house tool constructed in the ENVI/IDL environment. After breakline processing, products from these algorithms are brought into a Geographic Information System as analytical layers and applied to a mobility routing model, demonstrating the effect of breaklines as obstacles in the calculation of optimal, off-road routes. Elevation model breakline analysis can serve as significant added value to micro-terrain feature and canopy mapping, obstacle identification, and route planning.