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Letteratura scientifica selezionata sul tema "Navigation"

Autore: Grafiati

Pubblicato: 4 giugno 2021

Ultima modifica: 7 settembre 2024

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Articoli di riviste sul tema "Navigation"

Luo, Jianan, Xiaoxia Wan e Jing Duan. "A New Model of Environment-Aware Geographic Information Services in E-navigation". Journal of Navigation 73, n. 2 (7 novembre 2019): 471–84. http://dx.doi.org/10.1017/s0373463319000766.

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Navigational information is of great significance to the safety of maritime navigation. To better guarantee navigator safety and improve navigation efficiency, an applied model of geographic information services (GI services) that consists of an operational architecture, several subsystems and multiple GI services is presented. This work is an e-navigation testbed that follows e-navigation technical architecture and integrates a large amount of navigation-related resources. Real-time, location-based and on-demand digital navigational information can be exchanged and applied in a standardised way. An experiment conducted in the Pearl River Estuary area of the South China Sea showed that application of GI services in e-navigation can supplement the existing methods of exchanging navigational information and better assist navigators in decision making. Furthermore, the proposed model is adaptable and could be easily applied in other areas.

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KRAMARENKO, Viktoria. "The essence and structure of the concept "information competence of future navigation and ship handling specialists"". Scientific Bulletin of Flight Academy. Section: Pedagogical Sciences 10 (2021): 47–54. http://dx.doi.org/10.33251/2522-1477-2021-10-47-54.

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The article highlights the essence and structure of the concept of "information competence of future specialists in navigation and ship handling". It is proved that information competence of a specialist in navigation and ship handling involves the ability to work with large volumes of information to solve complex problems of professional activity and is an important factor in the success of professional activity. Taking into account the scientific works on the formation of information competence and peculiarities of the professional activity of a specialist in navigation and ship handling their information competence can be defined as an integrative personal quality, encompassing motivation for information activity, conscious attitude and interest in navigational information, knowledge of the types of information activities of a navigator, assignment and composition of the navigation information system, the ability to search for necessary information, understand information flows and communications, make optimal use of all navigational data, to carry out information and analytical processing of information relating to ship handling systems, navigation information resources and information security systems. The components of information competence of a specialist in navigation and ship handling service are motivational-personal, information-cognitive and activity-operational. Motivational and personal component concerns motivation to information activity, conscious attitude and interest in navigation information, readiness to work with different types of navigation information and to constantly improve the level of information competence. The information-cognitive component of information competence of a navigation and ship handling specialist covers the knowledge of types of information activities of a navigator, assignment and composition of navigation information system, formalized methods of analytical-synthetic information processing, peculiarities of various objects analysis, work with electronic format of information representation, information on methods and algorithms of electronic databases and data banks creation, distribution and acquisition of information in a group. The activity-operational component of information competence of future navigation and ship handling specialists concerns the most important abilities and skills of working with information, i.e. the ability of a navigator to perform information-analytical processing of information related to ship handling systems, management of navigation information resources, information security systems. Key words: information competence, cadet, navigation and ship handling specialist, motivational-personal, information-cognitive and activity-operational components.

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Greenwood, Narcessa Gail-Rosales, Cynthia B. Taniguchi, Amy Sheldrick e Leslie Hurley. "Navigation models in diverse outpatient settings: Shared themes, challenges, and opportunities." Journal of Clinical Oncology 36, n. 30_suppl (20 ottobre 2018): 134. http://dx.doi.org/10.1200/jco.2018.36.30_suppl.134.

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134 Background: Navigation has been recognized by the Centers for Medicare and Medicaid Services (CMS) as a component of quality oncology care. This discussion highlights progress of Nurse Navigation implementation within 3 US Oncology Network practices. A team-based approach optimizing patient care coordination and providing enhanced services has been identified. Study practices demonstrate common navigation goals and desired outcomes, despite variations in practice size, dissimilar workflows, and unclear best-practice guidelines for navigation in the outpatient setting. Methods: The US Oncology Network formed a committee to study and develop evidence-based nurse navigation processes for recommendation to the greater Network. The committee includes 6 members, each a lead Oncology Nurse Navigator, practicing in different US geographical regions. Preliminary steps were to seek evidence-based support through: Existing models for Oncology Nurse Navigation that are adaptable for the community setting Best-practice in navigation recommendations from esteemed professional organizations Challenges and solutions identified and implemented Scope of practice for the Nurse Navigator in a community setting Performance metrics targeting effective, value-driven navigation Results: Focusing on scientific Nursing Process, study practices provided navigation services to 3762 patients. Gaps in navigation processes were identified, as well as barriers throughout the continuum of care. Scope of Practice for the community-based Nurse Navigator was defined. Navigation framework was established to include patient/family education, psychosocial interventions, referral outsourcing, and patient advocacy. A formal job description was created for the role of the Oncology Nurse Navigator. The Interdisciplinary Care Team Conference Standard was finalized to support coordination of care. Conclusions: Work remains to define, implement, and test effective navigational models to support challenges of patients receiving care in the outpatient setting. Benefits resulting from Nurse Navigation processes are emerging as healthcare trends advance quality of care while decreasing total cost of care.

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Green, Hannah M., Viridiana Carmona-Barrera, Laura Diaz, Chen Yeh, Brittney Williams, Ka’Derricka Davis, Michelle A. Kominiarek et al. "Implementation of postpartum navigation for low-income individuals at an urban academic medical center". PLOS ONE 18, n. 2 (23 febbraio 2023): e0282048. http://dx.doi.org/10.1371/journal.pone.0282048.

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Background Patient navigation, a patient-centered intervention to promote comprehensive health care, is an emerging innovation in obstetrics to optimize postpartum care. We aimed to evaluate the implementation of a novel postpartum patient navigation program at an urban academic medical center. Methods This mixed-methods study analyzed the implementation of a postpartum patient navigation program within an ongoing randomized control trial. This study analyzed three navigators’ logs of interactions with 50 patients, care team members, and community organizations throughout patients’ first year postpartum. We categorized and quantified interactions by topic addressed, care team member interacted with, and communication mode used. We also conducted semi-structured interviews with each navigator every three months (5 interviews per navigator), emphasizing navigation experiences, relationships with patients and care teams, integration in the care team, and healthcare system gaps. Interview data were analyzed using the constant comparative method to identify themes using the constructs of the Consolidated Framework for Implementation Research (CFIR). Results Analysis of navigator logs revealed a high patient need level, especially in the first 3 months postpartum. CFIR-guided analysis of intervention characteristics revealed positive perceptions of navigation’s utility due to its adaptability. Navigation’s complexity, however, posed an early obstacle to implementation that diminished over time. Outer setting analysis indicated navigators addressed patient needs through interactions with multiple systems. Despite clinicians’ initial unfamiliarity with navigation, inner setting analysis suggested ongoing communication and electronic medical record use facilitated integration into the care team. Regarding individual and process characteristics, findings emphasized how navigator self-efficacy and confidence increased with experience (individual) and was facilitated by comprehensive training and reflection (process). Overall, barriers to implementation included unfamiliarity, varied patient engagement, and innovation complexity. Facilitators included high patient need, communication with outside organizations, medical record usage, navigator characteristics (self-efficacy, communication skills, and personal growth), a comprehensive training period, consistent reflection, high relative advantage, and high adaptability to patient need. Conclusion Patient navigation is a promising innovation to improve postpartum care coordination and support care team efforts. The successful implementation of navigation in this study indicates that, if shown to improve patient outcomes, obstetric navigation could be a component of patient-centered postpartum care.

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Karetnikov, Vladimir, Anatoly Burkov, Andrei Prokhorenkov e Konstantin Efimov. "Fundamentals of training navigators of ships flying foreign flags when entering the inland waterways of the Russian Federation". E3S Web of Conferences 363 (2022): 01029. http://dx.doi.org/10.1051/e3sconf/202236301029.

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Navigation on inland waterways, such as rivers, canals, fairways via reservoirs and lakes is performed under conditions of a minimum under the keel clearance, hydrodynamic interaction between the ship's hull and underwater limits of the fairway, and the impact of irregular currents. Piloting a ship difficult navigational conditions requires the navigator to monitor continuously the ship’s motion, assess quickly the situation and develop optimal decision for ship handling, have sufficient navigational experience and a large amount of practical knowledge. To achieve a high level of qualification, the training of navigators is carried out in several ways at once - general and particular pilotage, organization of navigation safety and the theoretical foundations of ship handling. Lack of theoretical or practical knowledge can lead to wrong assessment of navigation situation and therefore be considered as factor limiting passage of vessel and navigational safety. The article contains analysis of inland waterways navigation particulars as basis of training for navigators of ships flying foreign flags when entering the inland waterways of the Russian Federation to reduce influence of limiting factors and support the navigational safety.

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Marcjan, Krzysztof, e Lucjan Gucma. "A Concept of a Ship Domain for the Use of Navigational Safety Assessment / Analiza Bezpieczeństwa Morskiego z Wykorzystaniem Domeny Wokół Statku". Journal of KONBiN 33, n. 1 (1 settembre 2015): 19–28. http://dx.doi.org/10.1515/jok-2015-0002.

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Abstract One of the most important concepts concerning the safety of navigation is the ship domain. The maritime domain is one of the oldest domains, which preceded the ones used in aviation, railway industry, chemical industry and medical. Through the concept of a ship domain is to be understood a certain area around the vessel, which the navigator wants to keep free of other fixed and moving objects. Navigational situation can be considered safe as long as no other ship neither any navigational obstacle would not exceed the area. In order to build and develop methods to assess the safety of the navigation, a ship probabilistic domains for three types of vessel encounter situations were determined based on the AIS traffic monitoring data. The aim of the paper is to present a method to identify navigational incidents on the basis of a probabilistic domain, which can be used to assess the safety of navigation and discovery places potentially dangerous for navigation in the selected areas of the Baltic Sea.

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Cao, Caroline G. L., e Paul Milgram. "Direction and Location Are Not Sufficient for Navigating in Nonrigid Environments: An Empirical Study in Augmented Reality". Presence: Teleoperators and Virtual Environments 16, n. 6 (1 dicembre 2007): 584–602. http://dx.doi.org/10.1162/pres.16.6.584.

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Nonrigid environments, such as the human colon, present unique challenges in maintaining spatial orientation during navigation. This paper presents a design concept for presenting spatial information in an augmented reality (AR) display, together with results of an experiment conducted to evaluate the relative usefulness of three types of spatial information for supporting navigation and spatial orientation in a nonrigid environment. Sixteen untrained subjects performed a simulated colonoscopy procedure, using rigid and nonrigid colon models and six different AR displays comprising various combinations of direction, location, and shape information related to the scope inside the colon. Results showed that, unlike navigating in rigid environments, subjects took 44% longer to navigate the nonrigid environment and were less efficient, and suggested that it may be useful to train aspiring endoscopists in an equivalent rigid environment initially. A navigational aid presenting shape information was more beneficial than location or direction information for navigating in the nonrigid environment. Even though the AR navigational aid display did not speed up travel time, navigation efficiency and confidence in direction and location judgment for all subjects were improved. Subjectively, subjects preferred having shape information, in addition to position and direction information, in the navigational aid.

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Kokorelias, Kristina M., Tracey DasGupta e Sander L. Hitzig. "Designing the Ideal Patient Navigation Program for Older Adults with Complex Needs: A Qualitative Exploration of the Preferences of Key Informants". Journal of Applied Gerontology 41, n. 4 (14 dicembre 2021): 1002–10. http://dx.doi.org/10.1177/07334648211059056.

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Navigating the healthcare system is complex. Many older adults and their family members report sub-optimal outcomes when transitioning from hospital to home. Patient navigation has been introduced as a model of care to help improve hospital to home transitions and to better integrate care across care environments. There are no best-practice guidelines for designing a patient navigation program for older adults with complex needs. This qualitative descriptive study interviewed 38 healthcare professionals to determine key characteristics of the “ideal” patient navigator program. Thematic analysis revealed four themes describing key components of an ideal patient navigator program for older adults with complex needs: (1) Easy accessibility and open communication amongst staff; (2) flexible eligibility requirements; (3) characteristics of the patient navigator; and (4) appropriate program size and duration. We suggest directions for future research, program design, and implementation considers to improve patient navigation for older adults and their family caregivers.

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Roth, Timothy C., e Aaron R. Krochmal. "Of molecules, memories and migration: M1 acetylcholine receptors facilitate spatial memory formation and recall during migratory navigation". Proceedings of the Royal Society B: Biological Sciences 285, n. 1891 (14 novembre 2018): 20181904. http://dx.doi.org/10.1098/rspb.2018.1904.

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Many animals use complex cognitive processes, including the formation and recall of memories, for successful navigation. However, the developmental and neurological processes underlying these cognitive aspects of navigation are poorly understood. To address the importance of the formation and recollection of memories during navigation, we pharmacologically manipulated turtles ( Chrysemys picta ) that navigate long distances using precise, complex paths learned during a juvenile critical period. We treated freely navigating turtles both within and outside of their critical learning period with a specific M1 acetylcholine receptor antagonist, a drug known to disrupt spatial cognition. Experienced adult turtles lost all navigational ability under the influence of the drug, while naive juveniles navigated successfully. We retested these same juveniles the following year (after they had passed their critical period). The juveniles that initially navigated successfully under the influence of the antagonist (but were unable to form spatial memories) were unable to do so subsequently. However, the control animals (who had the opportunity to form memories previously) exhibited typical navigational precision. These results suggest that the formation of spatial memories for navigation occur during a critical period, and successful navigation after the critical period is dependent upon the recall of such memories.

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Gucma, Stanisław, Wojciech Ślączka e Andrzej Bąk. "Assessment of ship manoeuvring safety in waterway systems by relative navigational risk". Archives of Transport 64, n. 4 (31 dicembre 2022): 109–24. http://dx.doi.org/10.5604/01.3001.0016.1230.

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The safety of vessels navigating in the sea waterway system is ensured by fulfilling the acceptable restrictions called safe ship operation conditions in that system. The assessment of navigation safety is particularly important when the conditions for safe operation of ships in the waterway system are changed concerns increasing the maximum parameters of vessels, increasing the allowable hydrometeorological conditions or changing the minimum tug assistance. The article presents a method for assessing navigation safety when the conditions for the safe operation of vessels in the waterway system get changed. The method uses two indicators, which are difference in navigation risks and relative navigation risk. To determine the navigational risk, algorithms were developed for calculating the probability of accidents caused by the deterioration of navigation conditions and technical failure of ship equipment and tugs. Another algorithm was developed for calculating the consequences of the accidents that involve blocking a waterway by a ship anchoring in an emergency, grounding, impact of the ship against a port structure or moored ship and a collision with another ship in motion. The method developed for assessing navigation safety by means of relative navigation risk can be used in practice when changing the conditions for safe operation of vessels in the waterway system and when the system is modernized. Navigational safety management is a decision process that is implemented in the loop presented in the article. The acceptable risk is determined on the basis of vessel traffic intensity and ship parameters defined by safe operation conditions for a given waterway system. Relative navigational risk may be used in assessment and comparison of various conditions of safe ship operation. The probability of an accident caused by ship's moving outside the available navigable area due to technical failures of ship equipment or tugs is determined, depending on the type of port waterway and the manoeuvres performed.

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Più fonti

Tesi sul tema "Navigation"

Lindgren, Anders. "Navigating Navigation : A Safety and Usability Evaluation of the Volvo P1 Navigation System". Thesis, Linköping University, Department of Computer and Information Science, 2005. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-4210.

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Navigation systems are today options provided by car manufacturers’ world wide and market predictions suggest that 25 percent of all cars produced by 2009 will have navigation systems installed. However, there are many human-interface issues concerning the use of these navigation systems. This thesis describes a study which evaluates and tests the safety and usability of the Volvo P1 navigation system and also contains suggestions on how the system and its controls should be designed to be safer and easier to use. This is done through heuristic evaluations and a Lane Change Test (LCT). The LCT is used to compare the level of driver distraction between the steering wheel control and remote control and also between common and advanced exercises in the system. Results from the study shows that there are no significant differences in distraction between using the steering wheel control or the remote control. The results also show that there are no significant differences in distraction between the common and advanced exercises. The results of the study are presented as a collection of design proposals that can be used to improve the system’s safety and usability.

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Franz, Matthias O. "Minimalistic Visual Navigation = Minimalistische visuelle Navigation /". Düsseldorf : VDI-Verl, 1999. http://www.gbv.de/dms/bs/toc/266809243.pdf.

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Törnberg, Pontus. "GNSS independent navigation using radio navigation equipment". Thesis, Luleå tekniska universitet, Rymdteknik, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-81212.

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This thesis studies algorithms to estimate an aircraft’s position with different information from various radio stations. Because aircrafts both civilian and military are heavily dependant on GNSS signals, it can be interfered from hostile sources. The aircraft shall then be able to navigate without the GNSS signals. This thesis focuses on three radio navigation systems, DME,VOR and TACAN. With the measurements from these three radio stations and measurements from the inertial navigation system one can estimate a position with an estimation filter. In this thesis two types of filters will be used, the linear Kalman filter and the Extended Kalman filter. The linear Kalman filter will be used when converting the TACAN measurements to a pseudo position and the Extended Kalman filter will be used for the DME,VOR and TACAN measurements. The results shows that the converted TACAN measurements and TACAN measurements estimates very well in both north and east direction. When using only DME measurements the filter estimates the position fairly well in the direction towards the station and poorly in the orthogonal direction. For the VOR measurements the filter estimates the position quite poorly in the direction of the radio station and well in the orthogonal direction. In conclusion the converted TACAN measurement and TACAN measurement algorithm can be used for navigation purposes by its own measurements. However, the DME and VOR measurement algorithms need to be combined or using multiple stations at different locations to get better estimates in both directions. All of the filter could use some better tuning to get the optimal filter, but it is not necessary.

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Igoniderigha, Nseabasi Ekaette. "Data navigation and visualization : navigating coordinated multiple views of data". Thesis, Edinburgh Napier University, 2015. http://researchrepository.napier.ac.uk/Output/8832.

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The field of coordinated and multiple views (CMVs) has been for over a decade, a promising technique for enhancing data visualization, yet that promise remains unfulfilled. Current CMVs lack a platform for flexible execution of certain kinds of open-ended tasks consequently users' are unable to achieve novel objectives. Navigation of data, though an important aspect of interactive visualization, has not generated the level of attention it should from the human computer interaction community. A number of frameworks for and categorization of navigation techniques exist, but further detailed studies are required to highlight the range of benefits improved navigation can achieve in the use of interactive tools such as CMVs. This thesis investigates the extent of support offered by CMVs to people navigating information spaces, in order to discover data, visualize these data and retrieve adequate information to achieve their goals. It also seeks to understand the basic principle of CMVs and how to apply its procedure to achieve successful navigation. Three empirical studies structured around the user's goal as they navigate CMVs are presented here. The objective of the studies is to propose a simple, but strong, design procedure to support future development of CMVs. The approach involved a comparative analysis of qualitative and quantitative experiments comprising of categorised navigation tasks carried out, initially on existing CMVs and subsequently on CMVs which had been redesigned applying the proposed design procedure. The findings show that adequate information can be retrieved, with successful navigation and effective visualization achieved more easily and in less time, where metadata is provided alongside the relevant data within the CMVs to facilitate navigation. This dissertation thus proposes and evaluates a novel design procedure to aid development of more navigable CMVs.

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Bernelind, Sarah. "Navigation in Augmented Reality, Navigation i Augmented Reality". Thesis, KTH, Skolan för datavetenskap och kommunikation (CSC), 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-172907.

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The concept of augmented reality has existed since the 60’s. In this thesis it has been investigated if navigation using a mobile device would benefit, from a usability perspective, if the navigational data were presented using augmented reality instead of a standardized map. The usability principles from which the applications were evaluated are learnability, user satisfaction, efficiency and effectivity. An AR prototype was developed and tested against a standard map, in the form of Google Maps, both used on a smart phone. The experiments were performed using think aloud during the tests and questionnaires before and after to collect both quantitative and qualitative data. The experiment was performed using possible users of AR as test subjects. The results were very similar for both applications but in favor of Google Maps. The author reflects on the results and the method and provides different situations where one might be better than the other.

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Freider, Elias. "Crowd Navigation : Autonomous navigation in an urban environment". Thesis, KTH, Skolan för datavetenskap och kommunikation (CSC), 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-169497.

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In this thesis, strategies for navigating a crowded area using an autonomous holonomic robot are discussed and evaluated. The focus is set on path planning and the topic is therefore largely decoupled from the prediction (i.e. machine learning) and control theory techniques needed for a practical implementation outside of the simulated environment. Existing methods and algorithms for path planning in highly dynamic environments are compared using several measures via computer simulations in different environments. A new, effective, and yet simple, algorithm is introduced and proven to be useful in certain scenarios. This algorithm, ART, predicts the future states of the crowd and using these predictions finds better paths to the goal than traditional algorithms.
I detta examensarbete utvärderas och diskuteras strategier för navigering bland folk med hjälp av en självstyrd holonomisk robot. Fokus är satt på navigeringsproblemet i sig och närliggande ämnen som maskininlärning och reglerteknik behandlas ej även om en fördjupning på dessa områden vore nödvändigt för en praktisk implementation utanför den simulerade världen. Existerande strategier och algoritmer för navigering av dynamiska miljöer utvärderas genom datorsimuleringar i varierande miljöer. En ny algorithm presenteras och visar sig vara användbar i vissa situationer. Denna algoritm, ART, förutser folkmassans rörelser och använder denna information för att hitta bättre vägar till målet.

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Knutsson, Pontus, e Oskar Georgsson. "Augmented Reality Navigation Compared to 2D Based Navigation". Thesis, Malmö universitet, Fakulteten för teknik och samhälle (TS), 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:mau:diva-20499.

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I nästan tre decennier har GPS-koordinater och rutt-instruktioner visats i en top-down 2D-vy. Först i dedikerade navigationssystem, kommersiellt används för körning, till idag med GPS-system tillgängliga i våra smartphones. Det vanligaste sättet att idag visa GPS koordinater är fortfarande i någon form av 2D-vy som visar användaren var den är och vilka vägar / gator som ska tas. Detta har emellertid några problem som vi tror kan lösas med hjälp av Augmented Reality kombinerat med GPS. I denna uppsats beskrivs om och hur en Augmented Reality baserad navigerings vy kan göra det lättare för gående att navigera genom en stad jämfört med en 2D baserad navigering. För att svara på frågan presenterar denna studie en navigationsapplikation som kombinerar de två teknologierna GPS och Augmented Reality som sedan används i ett användartest. Resultaten från användartesterna och frågeformuläret visar att Augmented Reality-baserad navigering används bäst i scenarier där det finns många gator och det är svårt att berätta på en 2D-karta vilken gata du ska ta.
For almost three decades GPS coordinates and directions have been displayed with a top-down 2D view. At first in dedicated navigation systems, commercially used for driving, into today having GPS systems available in our everyday smartphones. The most common way to display the coordinates today are still by some sort of 2D view showing the user where it is and what roads/streets to take. This however has some problems that we believe can be solved using Augmented Reality combined with GPS. This paper sets out to answer the question if and how Augmented Reality displayed navigation can make it easier for pedestrians to navigate through a city compared to a 2D displayed navigation. In order to answer the question at hand this study presents a navigation application that combines the two technologies GPS and Augmented Reality which then is used in a user test. The results from the user tests and the questionnaire indicates that Augmented Reality based navigation is best used in scenarios where there are a lot of streets and it is hard to tell on a 2D map which street to take.

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Werner, Martin. "Ubiquitous Navigation". Diss., lmu, 2012. http://nbn-resolving.de/urn:nbn:de:bvb:19-147950.

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Mazaheri, Shima. "Indoor navigation". Thesis, Mittuniversitetet, Avdelningen för informationssystem och -teknologi, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:miun:diva-32798.

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In our day to day activity, imagine if you go to a museum, hospital or any kind of huge building. You need to find the best way to get into a specific depart- ment. It might be difficult to find the way even if you have the map of the building in your hand. Indoor positioning systems can be used to locate people or objects inside a building, using radio waves, signals, or other sensory information collected by a smartphone or tablet. Bluetooth Low Energy (BLE) beacons broadcast signals, and bluetooth devices, such as smartphones, can then receive these signals. BLE devices can take Received Signal Strength Indication (RSSI) information together with an algorithm to calculate the location of the user. This is a useful method for indoor environments when using Global Positioning System (GPS) is not an option [1]. In this project I tried to find a better solution for localization and navigation when GPS does not work. The focus of the project is to use communication be- tween smartphones and beacons, for guidance in inside environments, without using GPS. This thesis is about the applications I produced, which can be used for indoor localization and navigation. Using the applications, you can map any building such as university, hospital, museum, big mall etc. To map a building, you upload a map of the building and put waypoints where you placed beacons. Once mapping is done, you can log in to the web admin and put some informa- tion for each beacon. As a user, when outside a nearby mapped building, your phone can get notified (trough bluetooth), and you can download the user app, which includes the map of the building and shows your location. With the user app you can easily find your favorite places in the building and get information about place near you.

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Bäcklinder, Werf Karl, e Arteaga Jorge Antonio Anvar Gomez. "ForShore Navigation". Thesis, Linköpings universitet, Institutionen för teknik och naturvetenskap, 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-96188.

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This report describes a possible approach to using data fusion to combine vector and raster data to create a three dimensional interactive archipelago. The data is collected by two central governments and consists of real measurements. Vector data are originating from an ENC chart and information from Lantmäteriets web page Digitala Kartbiblioteket. Raster data exists that describes height and orto-photographies from Digitala Kartbiblioteket. OpenSceneGraph has been used to visualize the chart and wxWindows as a base for the user interface. The method used to create the terrain gives a result which at most diverge 0.07 meters from the extracted chart. Places where this error exists are easily detectable.
Rapporten beskriver ett möjligt sätt för datafusion mellan vektor och rasterdata för att skapa ett tredimensionellt interaktivt kustlandskap. Datan är insamlad av två olika myndigheter och representerar ett utsnitt av verkliga mätningar. Vektordata utgörs av information som tidigare extraherats från ett ENC sjökort samt information från lantmäteriests webtjänst det Digitala Kartbiblioteket. Rasterdata kommer i form utav höjddata och ortobild från digitala kartbiblioteket. OpenSceneGraph har används för att visualisera sjökortet och wxWindows som bas för användargränssnittet. Den metod som används vid skapandet av terräng ger ett resultat som avviker som mest 0.07 meter från det extraherade sjökortet. Punkter där detta fel uppstår är lätt identifierbara.

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Più fonti

Libri sul tema "Navigation"

Hofmann-Wellenhof, Bernhard, Klaus Legat e Manfred Wieser. Navigation. Vienna: Springer Vienna, 2003. http://dx.doi.org/10.1007/978-3-7091-6078-7.

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Terheyden, Karl, e Gerhard Zickwolff, a cura di. Navigation. Berlin, Heidelberg: Springer Berlin Heidelberg, 1986. http://dx.doi.org/10.1007/978-3-662-21924-9.

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Flensmarck, Kristofer. Navigation. Stockholm: Natur & Kultur, 2011.

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Clifton, Margaret. Navigation. Washington, D.C. (101 Independence Ave, S.E.): Science Reference Section, Science, Technology, and Business Division, Library of Congress, 2005.

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Inland Waterways Association. West Midlands Region., a cura di. Navigation. [Great Britain]: Inland Waterways Association West Midlands Region., 1987.

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Ammarell, Gene. Bugis navigation. New Haven, Conn: Yale University Southeast Asia Studies, 1999.

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Calhoun, Elizabeth A., e Angelina Esparza, a cura di. Patient Navigation. New York, NY: Springer New York, 2018. http://dx.doi.org/10.1007/978-1-4939-6979-1.

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Schmidt, Werner F. Astronomische Navigation. Berlin, Heidelberg: Springer Berlin Heidelberg, 1996. http://dx.doi.org/10.1007/978-3-642-79990-7.

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Smith, Philip M. Terrestrial Navigation. 1st edition. | Abingdon, Oxon ; N.Y. : Routledge, [2018]: Routledge, 2017. http://dx.doi.org/10.4324/9781315561141.

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Bequignon, Jean-Yves. Coastal navigation. Newton Abbot, Devon: David & Charles, 1995.

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Capitoli di libri sul tema "Navigation"

Chen, Yingying, Yaan Hu e Zhonghua Li. "Research on Influence from Ship Navigating in the Intermediate Channel Between Ship Lifts on Hydraulic Characteristics". In Lecture Notes in Civil Engineering, 599–610. Singapore: Springer Nature Singapore, 2023. http://dx.doi.org/10.1007/978-981-19-6138-0_52.

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AbstractThrough the method of physical model test, tests of ship navigating in the intermediate channel of the navigation structure of Longtan Hydropower Station were carried out to study the hydraulic characteristics, such as the water surface fluctuation in the ship chamber and the intermediate channel, the heave of ship bow and stern, and the mooring force of the berthing ship under different navigational conditions. The results indicate that from the perspective of ship lift operational efficiency, docking safety, ship navigating safety and berthing safety, the design navigable water depth of 3.6 m in the intermediate channel is reasonable and the navigational speed of the ship in the intermediate channel should not exceed 1.5 m/s. The research results can provide scientific basis and technical reference for the design and operation of the navigation structure of Longtan Hydropower Station.

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Terheyden, Karl, e Gerhard Zickwolff. "Funkpeilwesen". In Navigation, 1–58. Berlin, Heidelberg: Springer Berlin Heidelberg, 1986. http://dx.doi.org/10.1007/978-3-662-21924-9_1.

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Terheyden, Karl, e Gerhard Zickwolff. "Hyperbelnavigation". In Navigation, 59–119. Berlin, Heidelberg: Springer Berlin Heidelberg, 1986. http://dx.doi.org/10.1007/978-3-662-21924-9_2.

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Terheyden, Karl, e Gerhard Zickwolff. "Radar". In Navigation, 120–250. Berlin, Heidelberg: Springer Berlin Heidelberg, 1986. http://dx.doi.org/10.1007/978-3-662-21924-9_3.

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Terheyden, Karl, e Gerhard Zickwolff. "Integrierte Navigation und NAVSTAR GPS". In Navigation, 251–75. Berlin, Heidelberg: Springer Berlin Heidelberg, 1986. http://dx.doi.org/10.1007/978-3-662-21924-9_4.

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Terheyden, Karl, e Gerhard Zickwolff. "Physik". In Navigation, 276–365. Berlin, Heidelberg: Springer Berlin Heidelberg, 1986. http://dx.doi.org/10.1007/978-3-662-21924-9_5.

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Terheyden, Karl, e Gerhard Zickwolff. "Datenverarbeitung". In Navigation, 366–83. Berlin, Heidelberg: Springer Berlin Heidelberg, 1986. http://dx.doi.org/10.1007/978-3-662-21924-9_6.

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Terheyden, Karl, e Gerhard Zickwolff. "Formelsammlung für die Funknavigation". In Navigation, 384–92. Berlin, Heidelberg: Springer Berlin Heidelberg, 1986. http://dx.doi.org/10.1007/978-3-662-21924-9_7.

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Hofmann-Wellenhof, Bernhard, Klaus Legat e Manfred Wieser. "Introduction". In Navigation, 1–8. Vienna: Springer Vienna, 2003. http://dx.doi.org/10.1007/978-3-7091-6078-7_1.

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Hofmann-Wellenhof, Bernhard, Klaus Legat e Manfred Wieser. "Augmentation systems". In Navigation, 191–213. Vienna: Springer Vienna, 2003. http://dx.doi.org/10.1007/978-3-7091-6078-7_10.

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Atti di convegni sul tema "Navigation"

Myrick, Wil, Mike Tolfree e Tom Matarese. "Complementary PNT with Fusion Artificial Intelligence Link Synchronization Array for eVTOL Systems (FAILSAFESTM)". In Vertical Flight Society 80th Annual Forum & Technology Display, 1–5. The Vertical Flight Society, 2024. http://dx.doi.org/10.4050/f-0080-2024-1055.

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Fusion Artificial Intelligence Link Synchronization Array for eVTOL Systems (FAILSAFES™) is a resilient and redundant timing and positioning architecture based on low Size, Weight, Power, and Cost (SWaP-C) RF Ranging links for eVTOL systems navigating with Global Navigation Satellite System (GNSS) in degraded or denied environments. This paper describes the overall FAILSAFES™ concept and discusses the underlying Complementary Positioning, Navigation, and Timing (CPNT) capabilities based on ENSCO's PicoRangerTM Array technology (PRAT). PRAT provides an array of low-cost RF ranging links between FAILSAFES™ ground stations and aircrafts to support navigation and timing distribution in GNSS degraded or denied environments. This paper will explore components of FAILSAFES™ and discuss initial PRAT based fusion results with respect to frequency and time stability.

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Munishkin, Alexey A., Dejan Milutinović e David W. Casbeer. "Safe Navigation With the Collision Avoidance of a Brownian Motion Obstacle". In ASME 2017 Dynamic Systems and Control Conference. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/dscc2017-5295.

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This paper develops a control that combines deterministic and stochastic optimal control solutions to the problem of safe navigation around a spherical obstacle in order to reach a way-point location. The solution for navigation towards the way-point is based on the deterministic minimum time optimal control. Since the intent of the obstacle is unknown to the navigating vehicle, the vehicle anticipates this uncertainty and uses a stochastic optimal control for navigation around the obstacle. The two navigation solutions are combined based on their value functions. Results are illustrated by numerical simulations.

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Mohanty, Prases K., e Dayal R. Parhi. "A New Real Time Path Planning for Mobile Robot Navigation Using Invasive Weed Optimization Algorithm". In ASME 2014 Gas Turbine India Conference. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/gtindia2014-8166.

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In this article a new optimal path planner for mobile robot navigation based on invasive weed optimization (IWO) algorithm has been addressed. This ecologically inspired algorithm is based on the colonizing property of weeds and distribution. A new fitness function has been formed between robot to goal and obstacles, which satisfied the conditions of both obstacle avoidance and target seeking behavior in robot present in the environment. Depending on the fitness function value of each weed in the colony the robot that avoids obstacles and navigating towards goal. The optimal path is generated with this developed algorithm when the robot reaches its destination. The effectiveness, feasibility, and robustness of the proposed navigational algorithm has been performed through a series of simulation and experimental results. The results obtained from the proposed algorithm has been also compared with other intelligent algorithms (Bacteria foraging algorithm and Genetic algorithm) to show the adaptability of the developed navigational method. Finally, it has been concluded that the proposed path planning algorithm can be effectively implemented in any kind of complex environments.

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Singh Virdi, Satinder, Yisi Liu e Daniel Zhang. "EEG-based stress recognition in competency assessment using maritime navigation simulator". In 13th International Conference on Applied Human Factors and Ergonomics (AHFE 2022). AHFE International, 2022. http://dx.doi.org/10.54941/ahfe1002504.

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Human factors receive increasing attention in maritime operations as it is found that human errors cause up to 90% of maritime incidents. One of the solutions to enhance safety in maritime navigation is to consider both technical and non-technical skills during training and assessment. Technical skills are always the first and foremost step in training or assessment. However, it may not be enough to solely conduct the navigation safely and efficiently by technical skills. Non-technical skills such as situational awareness, workload and stress management, and decision making also play a critical role in safe navigation and should not be overlooked. In addition, the seafarers spend a long time on board as part of their typical work pattern, and due to the current pandemic, they might be stranded at sea for even longer. It has been urged that ship owners and managers take the right actions to care for seafarers' mental well-being, such as stress and fatigue. To fulfil the needs of non-technical skill assessment and monitoring of mental well-being, electroencephalogram (EEG) is utilized to recognize the seafarers' mental stress when performing specific tasks in a full-mission Advanced Navigation Research Simulator (ANRS). The EEG-based recognition has unique advantages over the other biosensors. For example, it has high temporal resolution and reflects the mental states that are not identifiable from facial expressions with acceptable accuracy. A simulator allows the researchers to design and implement navigation scenarios with different weather conditions, traffic density, vessel types, emergency alarms, etc. This is ideal for conducting experiments for human factors study. An experiment has been designed and conducted in ANRS to validate the use of EEG for maritime navigational competency assessment. Participants with varied maritime backgrounds and roles were invited for data collection, e.g., navigating officers and experienced marine Pilots. Demanding events such as engine failure, close quarter situation, and other bridge equipment failure were marked during the EEG data recording. The results show that the EEG based stress recognition correlates with the demanding events in the experiment and can reflect the difficulty level of the challenging circumstances. The proposed EEG-based recognition can be used to study the human element in competency assessment using a maritime navigation simulator to ensure objective competency assessment.

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Alblooshi, Khalil Ibrahim, Kamaljit Singh, Raju Paul e Faris Ragheb Kamal. "Approach to Nav Aids System on Islands". In Abu Dhabi International Petroleum Exhibition & Conference. SPE, 2021. http://dx.doi.org/10.2118/207271-ms.

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Abstract Offshore business is gradually moving from traditional Well Head Platforms to the concept of Artificial Drill Islands and use of renewable energy sources. Navigational Aids design for artificial drilling islands has unique challenges due to vast periphery. This paper highlights all such challenges along with recommendations for a reliable and cost effective solution. Clients as well as FEED/EPC Contractors can benefit from the experience shared in this paper. The trend over the last decade has been to develop Navigation Aids that minimize maintenance requirements whilst maintaining stable and satisfactory performance. Although, Navigation Aids are automated there is still a need for regular visual inspections as there is always the risk of vandalism, ship impact or damage during significant storm events. Navigational Aids System shall be in strict compliance with International Association of Lighthouse Authorities (IALA) Guidelines. In addition to usual Visual & Audible Navigations Aids, artificial islands require break water lanterns (both red & green type). Also, number of Navigational Aids is much more than those required for a typical offshore platform. Requirement of interfaces with remote ends need to be clearly defined as these have impact on the design and ultimate cost. GSM monitoring and control system, GPS synchronization & AIS remote monitoring shall be considered. Cabling over the Island periphery is neither reliable nor cost effective solution. Standalone solar power based Navigational Aids Skids with all control and monitoring facilities can be more suitable solution. Considering that Island Contractor provides few Navigational Aids before the mobilization of EPC Contractor, it is essential to coordinate the Navigational Aids design aspects to ensure synergy in terms of compatibility.

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Moore, Terry. "Navigating without a Navigator � A Review of Positioning and Navigation Technologies for UAVs". In 30th International Technical Meeting of The Satellite Division of the Institute of Navigation (ION GNSS+ 2017). Institute of Navigation, 2017. http://dx.doi.org/10.33012/2017.15159.

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DELONG, Nicolas, Aurélia Bourgeaux, Guillaume Juif e Chiara Rusconi. "Adaptation of Pre-Existing Navigation Library BOLERO for Interplanetary Missions". In ESA 12th International Conference on Guidance Navigation and Control and 9th International Conference on Astrodynamics Tools and Techniques. ESA, 2023. http://dx.doi.org/10.5270/esa-gnc-icatt-2023-076.

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The introduction of new low-cost tiny satellites has encouraged autonomous navigation research and development, benefiting other mission types such as deep-space navigation. Making the spacecraft more autonomous has two major advantages: While the communication delay between Earth and the spacecraft can be quite large, autonomous navigation has proven to be more reliable, allowing the spacecraft’s safety to be increased, particularly in deep-space highly perturbed environment. Another advantage is the reduced involvement of ground tracking, which results in a reduction in total mission costs. BOLERO is a space navigation library developed by CNES, since 2000, for on-board orbit determination in the Earth’s vicinity. For that purpose, it includes a very complete dynamical model adapted for any types of Earth orbits from LEO to GEO. The navigation function is composed of an Extended Kalman Filter, and the library contains all the usual GNSS measurement functions such as pseudo-range and carrier phase, single or dual frequency, for single or multi-constellations. It can also process range and Doppler measurements from Ground stations. On top of that, BOLERO can perform multi satellites navigation, assuming the exchange of measurements through inter-satellites link. Bolero contributes to the notion of improving spacecraft autonomy by providing an onboard orbit determination library that may be paired with an onboard navigator and orbit controller. It has already been deployed on Thales Alenia Space Topstar receivers family (with multiple flying experience since 2000 (HETE2, DEMETER, Proba 2...), and is currently integrated on Syrlinks receivers (N-SPHERE). The library is completed with the generic navigator DIONE, based on BOLERO. DIONE provides the input and output interfaces and enables the control of the navigation function. It is currently used on ground for validation purpose, for performance analysis, but an on board qualified version is under development. The adaptation of BOLERO and of the DIONE navigator, for interplanetary missions, are presented in this paper. The evolution consists of implementing the missing interplanetary dynamical environment, as well as new reference frames and time scales. New measurement types, such as Lidar, optical navigation, and Doppler measurements, are also added. The study raised many concerns about measurement management, including the use of DSN measurements on board, clock management, and the generation of optical measurements. The navigation function also offers new possible interfaces to the user, such as the information about the solar system bodies (position and velocities, direction,…), or reference frame data, for to be used for mission or spacecraft guidance purpose. The paper presents the chosen models and validation process and results.

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Zhang, Yubo, Hao Tan e Mohit Bansal. "Diagnosing the Environment Bias in Vision-and-Language Navigation". In Twenty-Ninth International Joint Conference on Artificial Intelligence and Seventeenth Pacific Rim International Conference on Artificial Intelligence {IJCAI-PRICAI-20}. California: International Joint Conferences on Artificial Intelligence Organization, 2020. http://dx.doi.org/10.24963/ijcai.2020/124.

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Vision-and-Language Navigation (VLN) requires an agent to follow natural-language instructions, explore the given environments, and reach the desired target locations. These step-by-step navigational instructions are crucial when the agent is navigating new environments about which it has no prior knowledge. Most recent works that study VLN observe a significant performance drop when tested on unseen environments (i.e., environments not used in training), indicating that the neural agent models are highly biased towards training environments. Although this issue is considered as one of the major challenges in VLN research, it is still under-studied and needs a clearer explanation. In this work, we design novel diagnosis experiments via environment re-splitting and feature replacement, looking into possible reasons for this environment bias. We observe that neither the language nor the underlying navigational graph, but the low-level visual appearance conveyed by ResNet features directly affects the agent model and contributes to this environment bias in results. According to this observation, we explore several kinds of semantic representations that contain less low-level visual information, hence the agent learned with these features could be better generalized to unseen testing environments. Without modifying the baseline agent model and its training method, our explored semantic features significantly decrease the performance gaps between seen and unseen on multiple datasets (i.e. R2R, R4R, and CVDN) and achieve competitive unseen results to previous state-of-the-art models.

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Ray, Valery, e Chris Gerlinsky. "CAD - Less Blind Navigation in Focused Ion Beam System". In ISTFA 2005. ASM International, 2005. http://dx.doi.org/10.31399/asm.cp.istfa2005p0217.

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Abstract Traditional approaches to navigation in focused ion beam (FIB) circuit edit include blind CAD navigation based on GDSII data from the manufacturer and navigation assisted by the in-situ optical microscope (OM). These approaches are difficult to apply in security audit and reverse engineering fields, where CAD data are unavailable and objects of interest are either too small, or located in an array that is too dense for imaging by in-situ OM. To address this issue, this article presents a methodology which is based on establishing a chip-specific system of coordinates and determination of precise locations of the objects of interest within the device. The work was performed on a Vectra 986 FIB system from FEI Company and a proprietary system for optical scanning of semiconductor devices. Auxiliary techniques allowing enhancement of navigational accuracy, developed for this application, are equally applicable to the general navigation procedures during generic FIB circuit modification.

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Coopmans, Calvin. "AggieNav: A Small, Well Integrated Navigation Sensor System for Small Unmanned Aerial Vehicles". In ASME 2009 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. ASMEDC, 2009. http://dx.doi.org/10.1115/detc2009-87636.

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Small UAV performance is limited by the sensors used in the navigational systems. Several solutions of various complexity and cost exist, however no ready-made solutions exist for a high-accuracy, low-cost UAV system. Presented is AggieNav: a small, integrated navigational 6 degree-of-freedom with compass and GPS sensor package designed for ideal navigation of small UAVs. System, hardware, and embedded software design for the system is detailed.

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Rapporti di organizzazioni sul tema "Navigation"

Benotman, Hisham. Multiple Diagram Navigation. Portland State University Library, marzo 2020. http://dx.doi.org/10.15760/etd.7299.

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Banks, Martin S. Visual Guided Navigation. Fort Belvoir, VA: Defense Technical Information Center, maggio 1999. http://dx.doi.org/10.21236/ada380934.

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Rosenfeld, Azriel, e Lary S. Davis. Autonomous Vehicle Navigation. Fort Belvoir, VA: Defense Technical Information Center, maggio 1986. http://dx.doi.org/10.21236/ada170379.

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Miller, P. A., J. Farrell, Y. Zhao e V. Djapic. Autonomous Underwater Vehicle Navigation. Fort Belvoir, VA: Defense Technical Information Center, febbraio 2008. http://dx.doi.org/10.21236/ada485442.

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Lazanas, Anthony, e Jean-Claude Latombe. Landmark-Based Robot Navigation,. Fort Belvoir, VA: Defense Technical Information Center, maggio 1992. http://dx.doi.org/10.21236/ada326022.

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CORPS OF ENGINEERS WASHINGTON DC. USACE Navigation Strategic Vision. Fort Belvoir, VA: Defense Technical Information Center, dicembre 2012. http://dx.doi.org/10.21236/ada602147.

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Counselman, C. C. Millimeter-Accuracy Satellite Navigation. Fort Belvoir, VA: Defense Technical Information Center, aprile 1991. http://dx.doi.org/10.21236/ada237736.

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Lin, Lihwa, e Zeki Demirbilek. Waves at Navigation Structures. Fort Belvoir, VA: Defense Technical Information Center, ottobre 2014. http://dx.doi.org/10.21236/ada622100.

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Mitchell, Kenneth N. Coastal Navigation Portfolio Management. Fort Belvoir, VA: Defense Technical Information Center, febbraio 2015. http://dx.doi.org/10.21236/ada622104.

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Tate, J. N., R. C. Berger e C. G. Ross. Houston-Galveston Navigation Channels, Texas Project. Navigation Channel Sedimentation Study, Phase 2. Fort Belvoir, VA: Defense Technical Information Center, luglio 2008. http://dx.doi.org/10.21236/ada484677.

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