Gotowe bibliografie tematyczne / Collisions de la route

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  1. Artykuły w czasopismach
  2. Rozprawy doktorskie
  3. Książki
  4. Części książek
  5. Streszczenia konferencji
  6. Raporty organizacyjne

Gotowa bibliografia na temat „Collisions de la route”

Autor: Grafiati
Data publikacji: 1 lutego 2025

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Artykuły w czasopismach na temat "Collisions de la route"

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THOMAS, NICOLE A., DANE STUCKEL, CARL GUTWIN i LORIN J. ELIAS. "Directional collisions during a route-following task". Journal of the International Neuropsychological Society 15, nr 2 (marzec 2009): 225–30. http://dx.doi.org/10.1017/s1355617709090328.

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AbstractNeurologically normal people tend to collide with objects on the right side more frequently than with objects located on the left side of space. This phenomenon could be attributable to pseudoneglect wherein individuals selectively attend to the left field. The current study investigated this effect using a virtual route-following task that was presented centrally, in the lower field, and in the upper field. Handedness was also examined. Fifty-two participants (four left handed) completed this task, and when presented in the lower field, more left-side collisions emerged. In the upper condition, this bias reversed direction to the expected rightward bias. In the central condition, there was no significant directional bias in collision behavior. An interaction between handedness and presentation condition indicated that left-handed participants experienced more right-side collisions in the central condition. Collectively, these results suggest that directional biases (i.e., left vs. right) in collision behavior are modulated by both location in the visual field (central, upper, or lower) and handedness. (JINS, 2009, 15, 225–230.)
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Tsou, Ming-Cheng, Sheng-Long Kao i Chien-Min Su. "Decision Support from Genetic Algorithms for Ship Collision Avoidance Route Planning and Alerts". Journal of Navigation 63, nr 1 (1.12.2009): 167–82. http://dx.doi.org/10.1017/s037346330999021x.

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When an officer of the watch (OOW) faces complicated marine traffic, a suitable decision support tool could be employed in support of collision avoidance decisions, to reduce the burden and greatly improve the safety of marine traffic. Decisions on routes to avoid collisions could also consider economy as well as safety. Through simulating the biological evolution model, this research adopts the genetic algorithm used in artificial intelligence to find a theoretically safety-critical recommendation for the shortest route of collision avoidance from an economic viewpoint, combining the international regulations for preventing collisions at sea (COLREGS) and the safety domain of a ship. Based on this recommendation, an optimal safe avoidance turning angle, navigation restoration time and navigational restoration angle will also be provided. A Geographic Information System (GIS) will be used as the platform for display and operation. In order to achieve advance notice of alerts and due preparation for collision avoidance, a Vessel Traffic Services (VTS) operator and the OOW can use this system as a reference to assess collision avoidance at present location.
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Erginli, Mustafa, i Ibrahim Cil. "Deep-Learning-Based Floor Path Model for Route Tracking of Autonomous Vehicles". Systems 10, nr 3 (15.06.2022): 83. http://dx.doi.org/10.3390/systems10030083.

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Real-time route tracking is an important research topic for autonomous vehicles used in industrial facilities. Traditional methods such as copper line tracking on the ground, wireless guidance systems, and laser systems are still used in route tracking. In this study, a deep-learning-based floor path model for route tracking of autonomous vehicles is proposed. A deep-learning floor path model and algorithm have been developed for highly accurate route tracking, which avoids collisions of vehicles and follows the shortest route to reach the destination. The floor path model consists of markers. Routes in the floor path model are created by using these markers. The floor path model is transmitted to autonomous vehicles as a vector by a central server. The server dispatches the target marker address to the vehicle to move. The vehicle calculates all possible routes to this address and chooses the shortest one. Marker images on the selected route are processed using image processing and classified with a pre-trained deep-CNN model. If the classified image and the image on the selected route are the same, the vehicle proceeds toward its destination. While the vehicle moves on the route, it sends the last classified marker to the server. Other autonomous vehicles use this marker to determine the location of this vehicle. Other vehicles on the route wait to avoid a collision. As a result of the experimental studies we have carried out, the route tracking of the vehicles has been successfully achieved.
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Namgung, Ho. "Local Route Planning for Collision Avoidance of Maritime Autonomous Surface Ships in Compliance with COLREGs Rules". Sustainability 14, nr 1 (25.12.2021): 198. http://dx.doi.org/10.3390/su14010198.

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A maritime autonomous surface ship (MASS) ensures safety and effectiveness during navigation using its ability to prevent collisions with a nearby target ship (TS). This avoids the loss of human life and property. Therefore, collision avoidance of MASSs has been actively researched recently. However, previous studies did not consider all factors crucial to collision avoidance in compliance with the International Regulations for Preventing Collisions at Sea (COLREGs) Rules 5, 7, 8, and 13–17. In this study, a local route-planning algorithm that takes collision-avoidance actions in compliance with COLREGs Rules using a fuzzy inference system based on near-collision (FIS-NC), ship domain (SD), and velocity obstacle (VO) is proposed. FIS-NC is used to infer the collision risk index (CRI) and determine the time point for collision avoidance. Following this, I extended the VO using the SD to secure the minimum safe distance between the MASS and the TS when they pass each other. Unlike previous methods, the proposed algorithm can be used to perform safe and efficient navigation in terms of near-collision accidents, inferred CRI, and deviation from the course angle route by taking collision-avoidance actions in compliance with COLREGs Rules 5, 7, 8, and 13–17.
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Hughes, Merrick Stuart Macqueen, i Jacobus Adriaan Albertus Engelbrecht. "Autonomous navigation for multiple unmanned aerial vehicles (UAVs) in urban environments". MATEC Web of Conferences 388 (2023): 04011. http://dx.doi.org/10.1051/matecconf/202338804011.

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This paper presents an autonomous navigation system for multiple unmanned aerial vehicles (UAVs) in urban environments. The navigation system comprises a long-term route planner and a short-term cooperative collision avoidance function. A 3D model of a real urban terrain is used to represent the environment within which the UAVs operate, and the system takes the motion constraints of the UAVs into account when performing planning. The navigation system enables multiple independent UAVs to travel from their departure points to their destinations while predicting and avoiding collisions with one another and with static terrain. Monte Carlo simulations on the system indicate a worst-case route planner replan rate of 11.65 %, route planner failure rate of 9.82×10-4 %, and collision resolution failure rate of 0.12 % for the collision avoidance function.
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Lu, Chao-Wei, Chao-Kuang Hsueh, Yung-Lin Chuang, Ching-Ming Lai i Fuh-Shyong Yang. "Marine Collision Avoidance Route Planning Model for MASS Based on Domain-Based Predicted Area of Danger". Journal of Marine Science and Engineering 11, nr 9 (1.09.2023): 1724. http://dx.doi.org/10.3390/jmse11091724.

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When the own ship encounters target ships in a close-quarter situation, an officer on watch needs to safely and timely alter the course of the vessel to avoid a collision. If ECDIS can automatically collect the navigation parameters and plot areas of collision as quasi-static obstruction areas, it will be much easier for seafarers to implement effective route planning. Hence, this study focuses on developing the MCARP model as a theoretical concept based on the DPAD model and LCD model. By operating the MCARP using ArcGIS, DPADs and several effective collision avoidance routes can be generated and imported into ECDIS based on AIS information at large scales and ample time. The graphic overlay of DPADs and effective routes on ECDIS can serve as a collision avoidance strategy reference for the personnel controlling maritime autonomous surface ships. Finally, different ships encountering situations were input into a Transas navigational simulator. The simulation results showed that own ship could avoid collisions with multiple target ships at distances larger than the preset collision avoidance distances, which also indicated that MCARP is practically feasible.
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Miyake, Rina, i Hiroko Itoh. "Design and Safety Assessment of Recommended Route off the Western Coast of Izu O Shima Island". Journal of Marine Science and Engineering 10, nr 8 (2.08.2022): 1060. http://dx.doi.org/10.3390/jmse10081060.

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Ship routeing systems (e.g., traffic separation schemes) have been established worldwide to ensure ship traffic safety. There are no specific measures to establish an effective ship route. We have previously proposed a method to design and assess the route comparison with the present traffic flow in the interest to establish an effective ship routeing system, particularly for recommended routes. The method consists mainly of the following procedures: understanding the existing phenomena and the issues in the target area by analyzing target traffic flow; designing safety measures; assessing the safety measures; and determining the optimal safety measure. This method was used to design and assess the recommended route off the western coast of Izu O Shima Island. This route has been in service since January 2018. The purpose of this study is to validate the proposed method. First, the technical details of the method are described. An automatic identification system (AIS) observation was conducted before and after the implementation to validate the effectiveness of the recommended route for reducing collisions. The results show that the recommended route effectively reduces the risk of collisions. More specifically, the proposed method was found to be useful when establishing an effective recommended route.
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Liu, Xin, Shuwei Ren, Lei Zhang, Wei Shen i Yubo Tu. "Research on Dynamic Path Planning and Tracking Control for Ship Collision Avoidance". Journal of Physics: Conference Series 2607, nr 1 (1.10.2023): 012012. http://dx.doi.org/10.1088/1742-6596/2607/1/012012.

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Abstract Ship collisions are prevalent every year, leading to significant maritime traffic accidents. This paper presents research on dynamic path planning and tracking control for ship collision avoidance by integrating ship automatic avoidance technology to address this issue. We conducted a comprehensive study on artificial potential fields, trajectory tracking, and route trajectory tracking in response to the current state of ship collision avoidance and trajectory tracking. The study employed vector decomposition and slider control as research methods to analyze, optimize, and modify ship collision avoidance methods. Additionally, we carried out collision avoidance simulations using MATLAB to verify the stability and safety of ship trajectory tracking under various methods to advance the research on ship collision avoidance and trajectory. The proposed approach has the potential to significantly reduce ship collisions and enhance ship trajectory safety.
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Aldred, Rachel, Susana García-Herrero, Esther Anaya, Sixto Herrera i Miguel Ángel Mariscal. "Cyclist Injury Severity in Spain: A Bayesian Analysis of Police Road Injury Data Focusing on Involved Vehicles and Route Environment". International Journal of Environmental Research and Public Health 17, nr 1 (21.12.2019): 96. http://dx.doi.org/10.3390/ijerph17010096.

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This study analyses factors associated with cyclist injury severity, focusing on vehicle type, route environment, and interactions between them. Data analysed was collected by Spanish police during 2016 and includes records relating to 12,318 drivers and cyclist involving in collisions with at least one injured cyclist, of whom 7230 were injured cyclists. Bayesian methods were used to model relationships between cyclist injury severity and circumstances related to the crash, with the outcome variable being whether a cyclist was killed or seriously injured (KSI) rather than slightly injured. Factors in the model included those relating to the injured cyclist, the route environment, and involved motorists. Injury severity among cyclists was likely to be higher where an Heavy Goods Vehicle (HGV) was involved, and certain route conditions (bicycle infrastructure, 30 kph zones, and urban zones) were associated with lower injury severity. Interactions exist between the two: collisions involving large vehicles in lower-risk environments are less likely to lead to KSIs than collisions involving large vehicles in higher-risk environments. Finally, motorists involved in a collision were more likely than the injured cyclists to have committed an error or infraction. The study supports the creation of infrastructure that separates cyclists from motor traffic. Also, action needs to be taken to address motorist behaviour, given the imbalance between responsibility and risk.
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Lee, Jeong-Seok, i Ik-Soon Cho. "Extracting the Maritime Traffic Route in Korea Based on Probabilistic Approach Using Automatic Identification System Big Data". Applied Sciences 12, nr 2 (10.01.2022): 635. http://dx.doi.org/10.3390/app12020635.

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To protect the environment around the world, we are actively developing ecofriendly energy. Offshore wind farm generation installed in the sea is extremely large among various energies, and friction with ships occurs regularly. Other than the traffic designated area and the traffic separate scheme, traffic routes in other sea areas are not protected in Korea. Furthermore, due to increased cargo volume and ship size, there is a risk of collisions with marine facilities and marine pollution. In this study, maritime safety traffic routes that must be preserved are created to ensure the safety of maritime traffic and to prevent accidents with ecofriendly energy projects. To construct maritime traffic routes, the analysis area is divided, and ships are classified using big data. These data are used to estimate density, and 50% maritime traffic is chosen. This result is obtained by categorizing the main route, inner branch route, and outer branch route. The Korean maritime traffic route is constructed, and the width of the route is indicated. Furthermore, this route can be applied as a navigation route for maritime autonomous surface ships.
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Rozprawy doktorskie na temat "Collisions de la route"

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Snyder, Sara Ann. "Examining the impacts of State Route 101 on wildlife using road kill surveys and remote cameras". DigitalCommons@CalPoly, 2014. https://digitalcommons.calpoly.edu/theses/1296.

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Roads can negatively impact the survival of wildlife populations through additional mortality from road kill and population fragmentation caused by road avoidance behaviors. The 11.9 mile section of State Route 101 between the towns of San Luis Obispo and Atascadero, CA, USA, cross a mountain lion movement corridor and an area important to maintaining ecological connectivity between protected lands in the Los Padres National Forest to the north and south. I examined the spatial patterns and landscape and roadway factors associated with road kill occurrence for six taxa; large mammals, mesocarnivores, squirrels, rabbits, birds and raptors. Between 1 May 2009 and 30 June 2010 road kills were documented using vehicle-based surveys. Small mammals were the most common road kill (58.3%), followed by mesocarnivores (10.9%), birds (10.6%), rabbits (5.1%), large mammals (3.3%) and raptors (3.2%). Twenty-nine large mammal road kills were observed during the survey period; eighteen mule deer, six black bears and five feral pigs. Road kill was highest in the middle of the survey area between the top of Cuesta Grade and the southern edge of Atascadero and lowest along the Cuesta Grade. I modeled road kill occurrence using logistic regression to determine which landscape and roadway characteristics were associated with road kill locations. Large mammal and mesocarnivore road kills were more likely to occur near riparian corridors. Mesocarnivore and squirrel road kills were associated with locations with greater roadside tree cover. Squirrel and rabbit road kills were more likely to occur along sections of the road with large grassy center medians. I documented animal activity patterns around the roadway during three survey periods (summer 2009, fall 2009 and spring 2010) using remote cameras placed on game trails and underpasses along the roadway. Mule deer displayed crepuscular activity patterns with peaks in activity in the morning between 05:00h and 07:00h and in the evening between 16:00h and 18:00h. Mesocarnivores generally displayed a nocturnal activity patterns with the majority of activity occurring between 18:00h and 06:00h. I used logistic regression to determine if there was a relationship between animal activity patterns and traffic patterns while controlling for time of day, day of the week, and season. Mule deer and mesocarnivore activity patterns varied significantly by time of day and mule deer activity also varied significantly by season; however only mesocarnivore activity varied significantly in relation to traffic volume suggesting that mesocarnivores are less activity when traffic volume is high. Using traffic volume and animal activity patterns I calculated a collision potential value for both mule deer and mesocarnivores. Collision potential for mule deer was high in the morning, between 06:00h and 08:00h, and in the evening, between 16:00h and 18:00h in all three seasons. Collision potential for mesocarnivores was high in the evening in fall 2009 (18:00h and 21:00) and spring 2010 (17:00h), and high in the morning in summer 2009 (09:00h).
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Wills, Johnny. "DNA-based hair sampling to identify road crossings and estimate population size of black bears in Great Dismal Swamp National Wildlife Refuge, Virginia". Thesis, Virginia Tech, 2008. http://hdl.handle.net/10919/34932.

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The planned widening of U.S. Highway 17 along the east boundary of Great Dismal Swamp National Wildlife Refuge (GDSNWR) and a lack of knowledge about the refugeâ s bear population created the need to identify potential sites for wildlife crossings and estimate the size of the refugeâ s bear population. I collected black bear hair in order to collect DNA samples to estimate population size, density, and sex ratio, and determine road crossing locations for black bears (Ursus americanus) in GDSNWR in southeastern Virginia and northeastern North Carolina. I also investigated bear/vehicle collisions to determine patterns of road crossing.

Genetic analysis of 344 hair samples collected on 2 trapping grids identified 85 unique individuals which I used in a mark-recapture analysis. Estimated population size on the trapping grids was 105 bears (95% CI = 91-148) and average density was 0.56 bears/km2. This density estimate projected over the entire Great Dismal Swamp ecosystem yielded a population estimate of 308 bears (550 km2 X 0.56 bears/km2). Similar population estimates generated by Hellgren (1988), Tredick (2005), and this study suggest a stable bear population in the Great Dismal Swamp ecosystem over a 20-year period.

I erected a 2.3-kilometer long strand of barbed wire along U. S. Highway 17 to monitor road crossing patterns near the Northwest River drainage. Genetic analysis identified 6 bears (4 males, 1 female, 1 unknown) that apparently crossed the highway in a 10-month period. Five of 6 bears deposited hair in a 171-m section which included the Northwest River corridor. The 6 bears detected crossed the road at least 11 times.

I investigated 10 reports of bear/vehicle collisions on the periphery of the refuge from June 2000 to May 2002. Six bears (4M:1F:1 unknown) were confirmed killed during this time period. Based on reported bear/vehicle collisions from Hellgren (1988), the Virginia Department of Game and Inland Fisheries database, and this study, a minimum of 4 to 5 bears are struck by vehicles each year on the periphery of the refuge. I identified 2 areas of multiple bear/vehicle collisions: highway 58 on the north side of the refuge near Hampton Airport and Highway 17 on the eastern side of the refuge in the vicinity of the Northwest River corridor.
Master of Science

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Youssef, Dalal. "Améliorer la sécurité routière au Liban : un parcours multidimensionnel allant de l'analyse exhaustive des défis à l'intégration des données et l'examen du comportement des conducteurs". Electronic Thesis or Diss., Bordeaux, 2024. http://www.theses.fr/2024BORD0268.

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Les collisions de la route, une préoccupation mondiale en matière de santé publique et de socio-économie, coûtent la vie à 1,19 million de personnes chaque année. Le Liban, avec une population de moins de 6 millions d'habitants, enregistre chaque année près de 1 000 décès dus aux collisions de la route. Les défis sont exacerbés par la croissance démographique, la possession de véhicules au sein des foyers, la détérioration des infrastructures et les conflits régionaux, le tout compliqué par des données fragmentées. Le manque de recherches antérieures sur la sécurité routière aggrave la situation en entravant la formulation de politiques éclairées. En utilisant une approche multidimensionnelle, cette thèse entreprend une exploration exhaustive des défis de la sécurité routière, visant à combler les lacunes de la recherche et s'efforce de fournir une stratégie holistique pour améliorer la sécurité routière. Sa vision ultime s'étend à des routes plus sûres, à une réduction des décès et à l'évolution vers un système de transport durable. La thèse se déploie en deux axes principaux : le système de management de la sécurité routière et le comportement des conducteurs. Dans le premier axe, une analyse exhaustive de la situation actuelle du système de management de la sécurité routière au Liban a été réalisée. Cette analyse examine en profondeur les défis, ainsi que les complexités historiques, institutionnelles, organisationnelles et financières qui influencent le cadre actuel de la sécurité routière. La thèse évalue les mécanismes d'application du code routier, les affectations budgétaires et propose des recommandations fondées sur des données probantes pour améliorer à la fois la sécurité routière et la durabilité au Liban. Cette analyse exhaustive souligne l'urgence d'adopter une stratégie holistique couvrant un large éventail d'aspects liés à la sécurité routière, de l'application rigoureuse des lois à l'amélioration des infrastructures, en passant par l'allocation durable des financements et la collaboration internationale active. Reconnaissant que les données soient la pierre angulaire d'une gestion efficace de la sécurité routière, la thèse aborde brièvement le problème crucial de la fragmentation et de l'incomplétude des données sur les traumatismes liés à la circulation routière au Liban. Se penchant sur le facteur humain, le deuxième axe se concentre sur le comportement des conducteurs, élément essentiel de la sécurité routière qui a manqué d'outils validés dans le contexte libanais. La thèse comporte l'adaptation transculturelle de quatre échelles de mesure (le locus de contrôle du trafic, le questionnaire sur le comportement des conducteurs, l’échelle de la colère au volant et l'inventaire des compétences des conducteurs) pour comprendre et atténuer les comportements dangereux des conducteurs. Ce processus complexe implique la traduction, l'adaptation transculturelle, une validation rigoureuse et l'implication de divers groupes de conducteurs libanais dans la collecte de données. Au-delà de la validation, elle explore l'association entre ce comportement et les collisions de la route, avec le potentiel d'influencer les politiques de sécurité routière et de promouvoir de bonnes pratiques de conduite. Cette thèse sert alors de plan directeur transformateur, visant à forger des routes plus sûres, à réduire les collisions et à améliorer la qualité de vie au Liban. Il s'agit d'un appel sans équivoque à répondre à l'urgence d'agir et à promouvoir des solutions fondées sur des données probantes
Road traffic collisions, a global public health and socio-economic concern, claim 1.19 million lives annually worldwide. Lebanon, with a population under 6 million, contends with nearly 1,000 road fatalities each year. Challenges are amplified by population growth, increased household vehicle ownership, deteriorating infrastructure, and the enduring impact of regional conflicts, all further obscured by fragmented data. The dearth of prior research on Lebanese road safety compounds the predicament, impeding informed policy formulation and precise solutions. The thesis unfolds along two main axes: road safety management and driver behaviour. The first axis provides a comprehensive analysis of the current state of road safety management in Lebanon. This analysis delves deeply into the challenges, as well as the historical, institutional, organizational, and financial complexities that shape the current framework for road safety. The thesis evaluates existing policies, enforcement mechanisms, budget allocations, and proposes evidence-based recommendations to improve both road safety and sustainability in Lebanon. This thorough analysis highlights the urgent need for a holistic strategy that covers a wide range of road safety aspects, from strict law enforcement to infrastructure improvements, sustainable funding allocation, and active international collaboration. Recognizing that data is the cornerstone of effective road safety management, the thesis addresses briefly the critical issue of fragmented and incomplete data on road traffic injuries in Lebanon. Focusing on the human factor, the second axis concentrates on driver behaviour, a key element of road safety that has lacked validated tools in the Lebanese context. The thesis advocates for the cross-cultural adaptation of four measurement scales (Traffic Locus of Control, Driver Behaviour Questionnaire, Driving Anger Scale, and Driver Skills Inventory) to understand and mitigate risky driver behaviours. This complex process involves translation, cross-cultural adaptation, rigorous validation, and the involvement of various groups of Lebanese drivers in data collection. Beyond validation, it explores the relationship between driver behaviour and road collisions, with the potential to influence road safety policies and promote good driving practices. This thesis thus serves as a transformative roadmap, aiming to create safer roads, reduce collisions, and improve the quality of life in Lebanon. It is a clarion call to address the urgent need for action and the pursuit of data-driven solutions
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Despringre-Bessière, Karine. "Détection d'obstacles sur route par télémétrie laser : évaluation des caractéristiques d'un système intégré". Grenoble INPG, 1996. http://www.theses.fr/1996INPG0071.

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Les caracteristiques d'un systeme de detection d'obstacles sur autoroute, a grande vitesse, sont evaluees. La technologie de base est la telemetrie laser temps de vol, utilisee au leti. Un bilan sur la securite routiere en france souligne le besoin des usagers pour ce type de systeme. La revue sur les systemes de detection d'obstacles experimentaux actuels montre leurs limitations pour l'application autoroutiere. Les capteurs telemetriques developpes au leti sont ensuite presentes. Un systeme a balayage multiligne, base sur une evolution de ces capteurs, est propose, pour repondre au besoin defini. Le systeme est informatif. Le contexte de fonctionnement du systeme est decrit precisement, ainsi que ses objectifs et les contraintes qu'il doit tenir. Une description fonctionnelle est presentee. Le systeme est constitue de trois parties: (1) la partie acquisition, qui comporte essentiellement la mesure de distance et le balayage, (2) la partie traitement, constituee de la detection et du suivi des obstacles puis de l'estimation du danger qu'ils representent (3) et enfin la partie visualisation des informations pour le conducteur. Le simulateur sitam (simulateur d'images telemetriques acquises en mouvement), developpe lors de la these pour valider l'approche, est presente ensuite. Le systeme d'acquisition est dimensionne. Ainsi les parametres necessaires au systeme sont determines dans les conditions de fonctionnement definies auparavant. En particulier, le champ de vue est defini (en site, azimut et profondeur), ainsi que la frequence d'echantillonnage et la puissance adequates. Une etude parametrique est effectuee. Des simulations permettent d'evaluer la variation de la zone percue en fonction des variations des parametres du systeme. Des solutions sont proposees pour le traitement des donnees fournies par le futur capteur defini
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Gupta, Anil K. "An algorithm to solve traveling-salesman problems in the presence of polygonal barriers". Ohio : Ohio University, 1985. http://www.ohiolink.edu/etd/view.cgi?ohiou1184007096.

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Augé, Patrick. "Spécification, modélisation et vérification d'une architecture multi-agents dédiée à la gestion des risques de collision automobile". Paris 11, 2001. http://www.theses.fr/2001PA112345.

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L'informatique prend une place importante dans les systèmes de divers secteurs d'activités, des dispositifs sophistiqués de l'industrie spatiale sont ainsi pilotés par des systèmes informatiques. Le bon fonctionnement repose alors sur le comportement correct de ces derniers. Aussi, la place des méthodes de vérification est importante, car apportant une garantie de bon fonctionnement rigoureuse et exhaustive, basée sur une approche théorique solide et des outils de génie logiciel réalisant les fondements théoriques. Dans le schéma de la vérification, un modèle du système est décrit dans un langage où la sémantique opérationnelle associe au modèle un graphe d'états, décrivant toutes les exécutions possibles, dans lequel peuvent être identifiés des séquences ou des états prohibés. La construction de ce graphe peut conduire à l'explosion combinatoire. Cette étape clé prend donc une place prépondérante dans les travaux de cette thèse où sont considérées différentes stratégies, de construction avec réduction, basées sur des ordres partiels et des relations d'équivalences : des outils de vérification les implantant ont été confrontés, par rapport à différentes études de cas classiques. Une étude de cas conséquente a été aussi menée sur un système basé agents d'aide à la conduite automobile, amenant à aborder des aspects spécification, construction de graphe et vérification. Cette étape a associée des spécialistes de communautés différentes, mettant en relief divers éléments d'un processus de conception de systèmes complexes. Cette collaboration a permis de définir les abstractions, en se focalisant sur le contrôle des interactions des agents, permettant ainsi la réduction de la taille du graphe d'états, rendant alors possible la vérification. La modélisation, dans les langages des outils visés du parallélisme des traitements, nous a aussi conduit à proposer plusieurs versions de schémas de contrôles et leurs vérifications ont toutes réussies
Computer sciences take a rising place in various industrial systems, complex spatial equipment are for instance controlled by computer systems. The equipment operates correctly when the behavior of the computer part is correct. Thus, verification methods are of great importance, as they prove the correct behavior according to rigorous and exhaustive analyses based on strong theories, the methods also bring appropriated tools. Within the verification scheme, a model of the system is described using languages which semantics associate to the model a state graph that represents all possible executions. This space makes it possible the identification of such states or sequences which are not allowed. The construction of this graph may lead to the combinatorial explosion problem. This key step takes thus preponderant place in this thesis, here are considered various construction strategies with reduction, based on partial orders and equivalency relations : verification tools implementing these strategies are compared according to various classical case studies. A more complex case study, that concerns an agent based system dedicated to road collision risks management, has also been dealt with. Consequently, specification, graph construction and verification aspects were considered. This part of the study associates researchers from different areas, highlighting key points of complex systems design. This collaboration allowed the definition of abstractions, focusing on interactions, reducing thus the size of state graphs, making possible the verification step. Modeling, within tools languages, of parallel processing, led us to propose several control schemes which verifications all succeeded
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Revue, Alexandre. "Contribution des systèmes d'information géographiques à la sécurité routière : approche multicapteurs pour l'évaluation de configurations à risques". Paris, ENMP, 2003. http://www.theses.fr/2003ENMP1147.

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Poulard, David. "Influence de l’âge et du morphotype sur la réponse mécanique du thorax : étude expérimentale in vivo et analyse numérique à l'aide de modèles EF personnalisés du corps humain". Thesis, Lyon 1, 2012. http://www.theses.fr/2012LYO10332/document.

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Cette étude aborde le problème de l’aggravation du risque de fractures de côtes chez les automobilistesâgés en choc frontal. L’analyse de la bibliographie fait ressortir que les moyens actuels d’évaluationdu risque de fractures ne permettent pas de prendre en compte les différences anatomiques et depropriétés mécaniques du thorax observées chez les personnes âgées. Les modèles éléments finis (EF)personnalisés du corps humain offrent un grand potentiel en tant qu’outil avancé d’évaluation durisque de blessures. Toutefois, des données expérimentales sont nécessaires pour valider ces modèlesdans des conditions réalistes. De plus, le choix du niveau de personnalisation et la sensibilité de laréponse du modèle à celle-ci doivent être évaluées.Des expérimentations in vivo menés sur des volontaires ceinturés en choc léger, de différents âges etanthropométries, ont été réalisées. Ces tests ont permis d’étudier l’influence de l’âge et de lacorpulence sur la réponse mécanique du thorax et ont permis l’obtention de corridors nécessaires à lavalidation de modèles EF personnalisés. La géométrie du modèle numérique THUMS a été adaptée àcelle des volontaires et les propriétés mécaniques du thorax ont été modifiées au vu du vieillissementpour effectuer une analyse similaire dans le domaine lésionnel. Les simulations numériques ont mis enévidence un risque accru de fracture de côtes pour certains modèles personnalisés.Cette étude devrait permettre de mieux estimer le risque de blessure pour les automobilistesvulnérables. Elle devrait contribuer ainsi à promouvoir les modèles personnalisés du corps humaincomme outil avancé d’évaluation du risque de blessures
This study deals with the topic of increased risk of rib fractures among elderly drivers infrontal impact. The analysis of the literature reveals that actual thorax injury assessment tools do nottake into account for the differences in anatomical features and biological material properties observedbetween adults and elderly. Personalized human body finite element (FE) models have great potentialas improved thorax injury assessment tools. However, experimental data are needed to validate thesemodels under real-world conditions. In addition, the choice of the level of personalization of the modeland the sensibility of the model response to this personalization must be assessed to predict thoracicinjury risk.In vivo sled tests were performed on belted volunteers of various anthropometries and age. These testswere used to assess the influence of age and corpulence on thorax mechanical response and allowed toobtain corridor responses needed to validate personalized FE models. The geometry of the FE modelTHUMS was adapted to the volunteers and the thorax material properties were modified consideringaging to carry out a similar analysis in the injurious domain. Numerical simulations highlighted anincreased risk of rib fractures for specific personalized models.This study should help to better estimate the injury risk for car occupants. It should contribute topromote personalized human body models as attractive thorax injury assessment tool ofvulnerable individuals
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Hartmann, Jean-Michel. "Etude de l'absorption infra-rouge par des mélanges gazeux HO-CO-CO-Air à température élevée modélisation, pour l'ingénieur, des propriétés radiatives, approches théorique et expérimentale de l'élargissement par collisions". Grenoble 2 : ANRT, 1986. http://catalogue.bnf.fr/ark:/12148/cb37599390v.

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Revue, Alexandre. "Contribution des systèmes d'informations géographiques à la sécurité routière : approche multicapteurs pour l'évaluation de configurations à risques". Phd thesis, École Nationale Supérieure des Mines de Paris, 2003. http://pastel.archives-ouvertes.fr/pastel-00000833.

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Książki na temat "Collisions de la route"

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Cockcroft, A. N. A guide to the collision avoidance rules: International Regulations for Preventing Collisions at Sea. Wyd. 6. Amsterdam: Elsevier, 2004.

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F, Lameijer J. N., red. A guide to the collision avoidance rules: International Regulations for Preventing Collisions at Sea. Wyd. 5. Oxford: Newnes, 1996.

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Benson, Michael. Crashes & collisions. Philadelphia: Chelsea House Publishers, 1997.

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Struck, Curtis. Galaxy Collisions. New York, NY: Springer New York, 2011. http://dx.doi.org/10.1007/978-0-387-85371-0.

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Christensen, Lars Lindberg, Raquel Yumi Shida i Davide De Martin, red. Cosmic Collisions. New York, NY: Springer New York, 2009. http://dx.doi.org/10.1007/978-0-387-93855-4.

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Desonie, Dana. Cosmic collisions. New York: Henry Holt & Co., 1996.

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McDaniel, E. W. Atomic collisions. New York: Wiley, 1989.

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Blome, Kerstin, Andreas Fischer-Lescano, Hannah Franzki, Nora Markard i Stefan Oeter, red. Contested Regime Collisions. Cambridge: Cambridge University Press, 2016. http://dx.doi.org/10.1017/cbo9781316411230.

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Bonche, Paul, Maurice Lévy, Philippe Quentin i Dominique Vautherin, red. Heavy Ion Collisions. Boston, MA: Springer US, 1986. http://dx.doi.org/10.1007/978-1-4684-5015-6.

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Eichler, Jörg. Relativistic atomic collisions. San Diego: Academic Press, 1995.

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Części książek na temat "Collisions de la route"

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Wu, Hao, Ming Lu, XinJie Zhou i Philip F. Yuan. "Application of 6-Dof Robot Motion Planning in Fabrication". W Proceedings of the 2021 DigitalFUTURES, 340–48. Singapore: Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-16-5983-6_31.

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AbstractIn practical robotic construction work, such as laying bricks and painting walls, obstructing objects are encountered and motion planning needs to be done to prevent collisions. This paper first introduces the background and results of existing work on motion planning and describes two of the most mainstream methods, the potential field method, and the sampling-based method. How to use the probabilistic route approach for motion planning on a 6-axis robot is presented. An example of a real bricklaying job is presented to show how to obtain point clouds and increase the speed of computation by customizing collision and ignore calculations. Several methods of smoothing paths are presented and the paths are re-detected to ensure the validity of the paths. Finally, the flow of the whole work is presented and some possible directions for future work are suggested. The significance of this paper is to confirm that a relatively fast motion planning can be achieved by an improved algorithmic process in grasshopper.
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Minami, Makiko, i Ruri Shoji. "Estimation of the Collision Risk on Planned Route". W Lecture Notes in Civil Engineering, 516–32. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-4680-8_36.

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Yike, Song, Lv Mingwei, Zhang Shaoqing i Wang Yanwei. "Cooperative Collision Avoidance Route Planning Based on Improved RRT Algorithm". W Lecture Notes in Electrical Engineering, 156–65. Singapore: Springer Nature Singapore, 2023. http://dx.doi.org/10.1007/978-981-19-6613-2_17.

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Ibrahim, Ehab Ahmed, Said El Noubi i Moustafa H. Aly. "Route Tracking of Moving Vehicles for Collision Avoidance Using Android Smartphones". W Lecture Notes in Electrical Engineering, 629–35. Cham: Springer International Publishing, 2014. http://dx.doi.org/10.1007/978-3-319-06764-3_81.

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Bagnarol, Massimo, Massimo Celio, Stefania Del Frate,, Dario Giaiotti, Simone Martini i Michela Mauro. "The ARPA FVG support to oil spill emergency response in the gulf of Trieste". W Ninth International Symposium “Monitoring of Mediterranean Coastal Areas: Problems and Measurement Techniques”, 365–77. Florence: Firenze University Press, 2022. http://dx.doi.org/10.36253/979-12-215-0030-1.33.

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Along shipping lanes the density of the ships is very high resulting, in a non-negligible probability of pollutant release in the sea. So, it is extremely important to react promptly to an oil spill emergency, to avoid that the pollutant spreads. This work describes services that are ready to use in case of oil spill. Services integrate weather and marine forecasts into a numerical model simulating the dispersion of the oil slick. Details are presented, together with applications during simulated ship collisions or accidental released along the routes. The focus is on the Adriatic area.
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Eilbrecht, Jan, i Olaf Stursberg. "Hierarchical Motion Planning for Consistent and Safe Decisions in Cooperative Autonomous Driving". W Cooperatively Interacting Vehicles, 303–20. Cham: Springer International Publishing, 2024. http://dx.doi.org/10.1007/978-3-031-60494-2_11.

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AbstractThe immersion of autonomous cars in continuously changing environments of on-road traffic requires procedures for decision-making with fast adaptation as well as guarantees on safe motion and collision-avoidance. This contribution proposes a three-layer hierarchic decomposition of the task of automatically steering the autonomous car along a designated route in cooperation with neighbored vehicles. The upper layer of the hierarchy identifies cooperative groups of those vehicles which are involved in a joint scenario for a phase of the planning horizon. The medium layer employs set-based computations of the free space for any vehicle of a joint scenario together with constrained optimal control to determine optimized motion plans. These plans are used on the lower layer as reference signals for tracking control in order to realize motion trajectories. The architecture ensures consistency of the vehicle motion with respect to safety for given assumptions, as well as relatively small computation times by combining offline with online computation.
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Garvit Pandya, Kalpesh, i Kevin Nesamani. "UAV Advancement: From Increasing Endurance, Route Re-Plan and Collision Avoidance, to Safe Landing in Critical Conditions". W Lecture Notes in Mechanical Engineering, 109–20. Singapore: Springer Singapore, 2018. http://dx.doi.org/10.1007/978-981-10-5849-3_12.

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Chambers, R. G. "Collisions". W Electronics in Metals and Semiconductors, 107–19. Dordrecht: Springer Netherlands, 1990. http://dx.doi.org/10.1007/978-94-009-0423-1_8.

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Dyke, Philip, i Roger Whitworth. "Collisions". W Guide to Mechanics, 93–118. London: Macmillan Education UK, 1992. http://dx.doi.org/10.1007/978-1-349-11114-5_5.

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Meystre, Pierre. "Collisions". W Atom Optics, 95–115. New York, NY: Springer New York, 2001. http://dx.doi.org/10.1007/978-1-4757-3526-0_6.

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Streszczenia konferencji na temat "Collisions de la route"

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Kahana, Allon, Barbara Sweet, Michal Rottem-Hovev i Zoltan Szoboszlay. "Terrain and Obstacle Avoidance Displays for Low-Level Helicopter Operations in Degraded Visual Environments". W Vertical Flight Society 70th Annual Forum & Technology Display, 1–11. The Vertical Flight Society, 2014. http://dx.doi.org/10.4050/f-0070-2014-9486.

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Hazards to helicopter low level flight include terrain as well as obstacles such as antennas and electric wires on the flight route. New passive warning systems and active obstacle detection sensors can provide avoidance information and warning of potential collision. However new methods must be developed and tested for how this information is presented to the pilot during flight. The aim of the study is to develop and test obstacle display concepts that help the pilot to maintain low level flight and while avoiding obstacles. It compares two different Helmet Mounted Display (HMD) symbology concepts: The spatial display that shows flight obstacles on a spatial presentation of the environment, and the 3D guidance symbology that indicate to the pilot the flight direction and altitude to avoid obstacles. Four HMD displays were compared representing the two concepts in a PC-based simulated tactic flight task. Twenty one pilots completed a low level flight task using both display types (in two experiments). Task performance was measured for the primary task (maintaining low level flight), and secondary task (detection and classification of targets during flight). Results show better task performance when using the Blinking Scene Linked (BSL) obstacle display, which was the type of display that presented spatial information.
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Colgate, Stirling A. "Equilibrium Ignition, a Minimum Energy Route to Fusion Via Multiple Mass Shell Collisions". W 2006 International Conference on Megagauss Magnetic Field Generation and Related Topics. IEEE, 2006. http://dx.doi.org/10.1109/megaguss.2006.4530723.

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Hirano, Yumi, Shweta Jain i Dipankar Raychaudhuri. "Chain effect of route recoveries and MAC layer collisions in wireless multi-hop networks". W 2011 IEEE Wireless Communications and Networking Conference (WCNC). IEEE, 2011. http://dx.doi.org/10.1109/wcnc.2011.5779175.

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Suzuki, Hideyuki, Shinya Okayama i Yukinari Fukumoto. "Collision of a Drifting Ship With Wind Turbines in a Wind Farm". W ASME 2013 32nd International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/omae2013-10440.

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A multiple collisions caused by a drifting ship which lost control and entered into a wind farm (WF) may cause relatively large risk for a WF comprised of bottom mounted type offshore wind turbines. A bottom mounted type wind turbine will be installed relatively close to shore in Japan and sometimes close to dense marine traffic area. Consideration of the risk will be necessary in planning a WF. This paper presented an estimation of a damage caused by collision with a drifting ship accidentally entered a wind farm. The WF is assumed comprised of bottom mounted type offshore wind turbines. The size of the drift ship considered in the analysis is 6788 GT. For smaller ships, damage to wind turbine considered to be small. Entry of ships from sides other than the one facing sea route was ignored because the number of ship entries from the sides was considered small. Under a number of limitations, risk of multiple collisions in WF by a drifting ship was formulated and quantitatively estimated.
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Kim, Won-Ouk, Song-Jin Kang, Young-Rong Kim i Chang-Je Kim. "A Study on Safer New Optimal Route for Anti-Collision in Coastal Waters". W ASME 2022 41st International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2022. http://dx.doi.org/10.1115/omae2022-79685.

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Abstract Although radar and AIS alarm functions have been used as support measures for collision prevention in many ships, they lacked the function to identify actual collision risk ships and inform the degree of risk and did not provide information on avoidance routes. This study aims to design a newly developed safer new optimal route for anti-collision based on the Collision Risk Zone assessment method, targeting mainly very small-sized ships that caused most of the collision accidents due to human errors. Designing a safer new optimal route is composed of three segments according to the ship’s characteristics. That is, empirical method for small-sized ships, collision risk zone method for larger ships and then combination method between empirical and collision risk method. In addition, this study analyzed the collision risk of various scenarios according to the navigation relationships and speed conditions between the two meeting ships. As a result, the model proposed in this study numerically calculated the risk of collision according to the navigation situation and could provide a safe optimal avoidance path accordingly. Therefore, this model can be applied to build the collision avoidance model of not only the current ship but remote-controlled ship, which is under compliance with COLREG regulations and involves the possibility of human error in an operation.
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Sha, Yanyan, i Jørgen Amdahl. "Ship Collision Analysis of a Floating Bridge in Ferry-Free E39 Project". W ASME 2017 36th International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/omae2017-62720.

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The Norwegian Public Roads Administration is running a project ‘Ferry free coastal route E39’ which includes replacing ferry crossings by bridges or tunnels across eight fjords in Western Norway. Since most of the fjords are wide and deep, traditional fixed links are not possible to be constructed. Therefore, floating bridge and tunnel concepts are proposed for the fjord-crossing project. Because floating bridges and tunnels have many structural components close to the water surface, a critical concern of accidental ship collision loads is then raised. Considering the large displacement and high speed of the passing ships, the interactions between the bridge structure and the ship bow can be significant should collision occurs. It is therefore important to carefully evaluate bridge response subjected to ship collision loads in the design process. This paper presents a case study of ship collision analysis of the floating bridge concept for Bjørnafjorden. Two possible collision scenarios, i.e. ship-pontoon and ship-girder collisions, are considered. First, local structural deformation and damage are numerically investigated by detailed finite element models using LS-DYNA. Second, bridge global response under ship collision loads are simulated in USFOS. By combining the local and global analyses, a comprehensive overview of bridge response under ship collision load can be obtained.
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Tarroja, Manuela Fe H., Lee W. Casperson, Arni Sicam i Pilak Chenkosol. "Period-doubling route to chaos in a standing-wave laser". W OSA Annual Meeting. Washington, D.C.: Optica Publishing Group, 1990. http://dx.doi.org/10.1364/oam.1990.tup7.

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The direct comparison between numerical and experimental results on the chaotic behavior of laser systems has been limited because the detection mechanisms usually allow only one or, at most, two aspects of their dynamical behavior to be observed simultaneously. Using a digital oscilloscope, we are able to observe simultaneously the temporal and spectral behavior as well as the corresponding phase plot of the output from a xenon laser, which is detected by a fast InAs detector. As the excitation current of the laser is increased, the laser exhibits a period-doubling route to chaos. Casperson's standing-wave model assumes an inhomogeneous broadening due to Doppler effect, includes the velocity-changing collisions, and uses the slowly-varying amplitude approximation. The model is described in Ref. 1. For numerical parameters consistent with the xenon properties and the experimental set-up, data sets of real and imaginary field amplitudes are generated for different values of excitation. From these, the intensity as a function of time, the power spectrum, and phase plot are calculated. The results show good qualitative agreement with the experimental results.
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Strabić, Marko, David Brčić, Vlado Frančić i Pavao Komadina. "On the possibility of COLREGS/STM integration". W Maritime Transport Conference. Universitat Politècnica de Catalunya. Iniciativa Digital Politècnica, 2022. http://dx.doi.org/10.5821/mt.10925.

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In the shipping industry, Sea Traffic Management (STM) system aims to represent a new paradigm in maritime safety. The idea of the STM implementation is to share information between all stakeholders, making shipping more efficient, safe, and environmentally friendly. With the growing market and related increase in marine transport and traffic, the risk of marine accidents is increasing as well. The STM provides numerous features for personnel on-board and shore to support decisions for safe navigation and operation based on real-time data. One of the services is the ship-to-ship route exchange, providing prediction of potentially dangerous situations and planning the vessel’s movement in advance. Analyses of marine accidents show that ship collisions are one of the most frequent types of marine accidents, the reason of which among all others, questions human error related to the knowledge of collision avoidance. This paper elaborates on the possibility of COLREGs/STM integration based on the use of STM ship-to-ship route exchange system. The decision model for COLREGs/STM integration procedure is presented in a way which enables suggestion on appropriate COLREG rule application in advance. Further system development is proposed as well, such as machine learning algorithms in COLREGs/STM integration, with the function of reducing the risks of marine accidents and increasing safety at sea.
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Smith, Austin, i Frederick Harmon. "UAS Collision Avoidance Algorithm Minimizing Impact on Route Surveillance". W AIAA Guidance, Navigation, and Control Conference. Reston, Virigina: American Institute of Aeronautics and Astronautics, 2009. http://dx.doi.org/10.2514/6.2009-6179.

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Qu, Yuling, i Songchen Han. "A Method to Calculate the Collision Risk on Air-Route". W 2010 International Conference on Management and Service Science (MASS 2010). IEEE, 2010. http://dx.doi.org/10.1109/icmss.2010.5575343.

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Raporty organizacyjne na temat "Collisions de la route"

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Kirk, P. N. A search for the production of direct leptons in nucleon-nucleus and nucleus-nucleus collisions. [Intermediate Energy Nuclear Physics Group, Dept. of Physics and Astronomy, Louisiana State Univ. , Baton Rouge]. Office of Scientific and Technical Information (OSTI), grudzień 1992. http://dx.doi.org/10.2172/6743509.

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Thubert, P., R. N. Sahoo i Z. Cao. Efficient Route Invalidation. Redaktor R. A. Jadhav. RFC Editor, kwiecień 2021. http://dx.doi.org/10.17487/rfc9009.

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Peeta, Srinivas, i Georgios Kalafatas. Critical Route Network for Earthquake Response and Dynamic Route Analysis. West Lafayette, IN: Purdue University, 2007. http://dx.doi.org/10.5703/1288284314232.

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Villamizar, C., R. Chandra i R. Govindan. BGP Route Flap Damping. RFC Editor, listopad 1998. http://dx.doi.org/10.17487/rfc2439.

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Brett Stone. Route Type Determination Analysis. Office of Scientific and Technical Information (OSTI), wrzesień 2011. http://dx.doi.org/10.2172/1031680.

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King, William A. Conversion to a Hydrogen Fuel Transportation Industry, Incremental Route or Direct Route. Fort Belvoir, VA: Defense Technical Information Center, marzec 2005. http://dx.doi.org/10.21236/ada431846.

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Peng, Zhongren. A Simultaneous Route-level Transit Patronage Model: Demand, Supply, and Inter-route Relationship. Portland State University Library, styczeń 2000. http://dx.doi.org/10.15760/etd.1158.

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Ullmann, R. RAP: Internet Route Access Protocol. RFC Editor, czerwiec 1993. http://dx.doi.org/10.17487/rfc1476.

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Templin, F., red. Asymmetric Extended Route Optimization (AERO). RFC Editor, sierpień 2012. http://dx.doi.org/10.17487/rfc6706.

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Royset, J. O., i H. Sato. Route Optimization for Multiple Searchers. Fort Belvoir, VA: Defense Technical Information Center, wrzesień 2009. http://dx.doi.org/10.21236/ada513141.

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