Articoli di riviste: "Navigation"

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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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Baric, Mate, David Brčić, Mate Kosor e Roko Jelic. "An Axiom of True Courses Calculation in Great Circle Navigation". Journal of Marine Science and Engineering 9, n. 6 (31 maggio 2021): 603. http://dx.doi.org/10.3390/jmse9060603.

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Based on traditional expressions and spherical trigonometry, at present, great circle navigation is undertaken using various navigational software packages. Recent research has mainly focused on vector algebra. These problems are calculated numerically and are thus suited to computer-aided great circle navigation. However, essential knowledge requires the navigator to be able to calculate navigation parameters without the use of aids. This requirement is met using spherical trigonometry functions and the Napier wheel. In addition, to facilitate calculation, certain axioms have been developed to determine a vessel’s true course. These axioms can lead to misleading results due to the limitations of the trigonometric functions, mathematical errors, and the type of great circle navigation. The aim of this paper is to determine a reliable trigonometric function for calculating a vessel’s course in regular and composite great circle navigation, which can be used with the proposed axioms. This was achieved using analysis of the trigonometric functions, and assessment of their impact on the vessel’s calculated course and established axioms.

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Karetnikov, Vladimir, Denis Milyakov, Andrey Prokhorenkov e Konstantin Efimov. "Method for choosing a scheme of placing navigation signs on a section of inland waterways for navigating a vessel with a given navigation risk value". E3S Web of Conferences 258 (2021): 02003. http://dx.doi.org/10.1051/e3sconf/202125802003.

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This paper is devoted to the method of choosing a scheme for placing navigation signs on sections of inland waterways to ensure the navigation of vessels with a given level of navigation risks. The methods used are known from the theory of probability and mathematical statistics for the assessment of navigation risks, which is proposed to be performed by stochastic methods, estimating the dis-placement of the center of the vessel's size and the variability of the maneuvering lane. It is shown that according to the results of mathematical modeling of the controlled movement of the vessel along the difficult for navigation section “Ivanovskie Porogi” on the Neva river, these navigation parameters are subject to the normal distribution law. This made it possible to reduce the problem of risk assessment to the problem of finding the probability of a random variable hitting the designated lane. A formal assessment of the navigational risk of navigating a vessel through a section that is difficult for navigation was carried out, on the ba-sis of which it is possible to judge the quality of the vessel's control and the prob-ability of the vessel going beyond the edge of the fairway. The results presented in this work were obtained during the implementation of the INFUTURE international project.

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Dotson, Nicholas M., e Michael M. Yartsev. "Nonlocal spatiotemporal representation in the hippocampus of freely flying bats". Science 373, n. 6551 (8 luglio 2021): 242–47. http://dx.doi.org/10.1126/science.abg1278.

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Navigation occurs through a continuum of space and time. The hippocampus is known to encode the immediate position of moving animals. However, active navigation, especially at high speeds, may require representing navigational information beyond the present moment. Using wireless electrophysiological recordings in freely flying bats, we demonstrate that neural activity in area CA1 predominantly encodes nonlocal spatial information up to meters away from the bat’s present position. This spatiotemporal representation extends both forward and backward in time, with an emphasis on future locations, and is found during both random exploration and goal-directed navigation. The representation of position thus extends along a continuum, with each moment containing information about past, present, and future, and may provide a key mechanism for navigating along self-selected and remembered paths.

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Fajnerová, Iveta, David Greguš, Jaroslav Hlinka, Tereza Nekovářová, Antonín Škoch, Tomáš Zítka, Jan Romportl, Eva Žáčková e Jiří Horáček. "Could Prolonged Usage of GPS Navigation Implemented in Augmented Reality Smart Glasses Affect Hippocampal Functional Connectivity?" BioMed Research International 2018 (13 giugno 2018): 1–10. http://dx.doi.org/10.1155/2018/2716134.

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Background. Augmented reality (AR) glasses with GPS navigation represent the rapidly evolving technology which spares (and externalizes) navigational capacities. Regarding the expected everyday usage of this device, its impact on neuroplastic brain changes and navigation abilities should be evaluated. Aims. This study aimed to assess possible changes in functional connectivity (FC) of hippocampus and other brain regions involved in spatial navigation. Methods. Thirty-three healthy participants completed two resting state functional magnetic resonance imaging (rsfMRI) measurements at the baseline and after 3 months. For this period, the experimental group (n = 17) has had used AR device (Vuzix M100) with incorporated GPS guidance system during navigation in real world. Participants from the control group (n = 16) have not used any GPS device while navigating during walking. The rsfMRI FC of right and left hippocampi was analyzed using a seed-driven approach. Virtual city task was used to test navigational abilities both before and after the usage of AR device. Results. We identified strong functional coupling of right and left hippocampi at the baseline (p < 0.05, FDR corrected). Mild changes in bilateral hippocampal FC (p < 0.05, FDR uncorrected) were observed in both assessed groups mainly between the bilateral hippocampi and between each hippocampus and temporal regions and cerebellum. However, the experimental group showed FC decrease after three months of using GPS navigation implemented in AR glasses in contrast to FC increase in the control group without such intervention. Importantly, no effect of intervention on navigational abilities was observed. Discussion. Our observation supports the assumption that externalization of spatial navigation to technological device (GPS in AR glasses) can decrease the functional coupling between hippocampus and associated brain regions. Considering some limitations of the present study, further studies should elucidate the mechanism of the observed changes and their impact on cognitive abilities.

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McWesler, Mary, William P. Marshak e Monica M. Glumm. "Innovative Measures of Accuracy and Situational Awareness during Land Navigation". Proceedings of the Human Factors and Ergonomics Society Annual Meeting 42, n. 19 (ottobre 1998): 1366–70. http://dx.doi.org/10.1177/154193129804201908.

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A helmet-mounted display (HMD)-based computer navigation system that partially mimics the U.S. Army's Land Warrior ensemble provided position information and map updates to soldiers navigating a three-kilometer course. Performance with the HMD system was compared to traditional navigation with paper map, compass, and a hand-held GPS receiver. New objective computer-based measures of navigational accuracy and situational awareness (SA) were developed. Traditional measures of navigational accuracy were not sensitive enough to detect differences between HMD and traditional navigational methods. The more sensitive new measure based on distance traveled found the HMD-based system to be superior. This method is easily adaptable to civilian applications such as orienteering. A supposed advantage of using HMDs is enhanced SA. A SA measure was developed which used probe questions generated by the computer. Although the probe questions found no significant differences between the conditions, the method seems promising for future applications.

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West, Robert, e Jure Leskovec. "Automatic Versus Human Navigation in Information Networks". Proceedings of the International AAAI Conference on Web and Social Media 6, n. 1 (3 agosto 2021): 362–69. http://dx.doi.org/10.1609/icwsm.v6i1.14238.

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People regularly face tasks that can be understood as navigation in information networks, where the goal is to find a path between two given nodes. In many such situations, the navigator only gets local access to the node currently under inspection and its immediate neighbors. This lack of global information about the network notwithstanding, humans tend to be good at finding short paths, despite the fact that real-world networks are typically very large. One potential reason for this could be that humans possess vast amounts of background knowledge about the world, which they leverage to make good guesses about possible solutions. In this paper we ask the question: Are human-like high-level reasoning skills really necessary for finding short paths? To answer this question, we design a number of navigation agents without such skills, which use only simple numerical features. We evaluate the agents on the task of navigating Wikipedia, a domain for which we also possess large-scale human navigation data. We observe that the agents find shorter paths than humans on average and therefore conclude that, perhaps surprisingly, no sophisticated background knowledge or high-level reasoning is required for navigating the complex Wikipedia network.

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Levchenko, O. "A METHOD FOR FORMALIZING THE DECISION-MAKING PROCESS FOR PREVENTING DANGEROUS SITUATIONS IN THE E-NAVIGATION SYSTEM". Shipping & Navigation 34, n. 1 (5 maggio 2023): 115–26. http://dx.doi.org/10.31653/2306-5761.34.2023.115-126.

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The study aims to improve the safety of ship traffic by improving the methods of formalizing the decision-making process for preventing dangerous situations in a single e-navigation concept. The goal is achieved by a clear statement of the problem and the choice of appropriate approaches to its solution. The main stages of the decision-making cycle performed by the navigator in collision prevention are analysed. Particular attention is paid to the operations performed at the decisionmaking stage on the further movement of the vessel. The ship's movement plan is described by models of elementary behaviour, each of which consists of elementary actions represented by a set of fuzzy logic rules for performing a certain subtask. The structure of a system that implements the behavioural approach to decision-making by a navigator is proposed. Emphasis is placed on the need to coordinate vessels when deciding to plan a route based on models of elementary behaviours, and a method for coordinating the planning of the vessel's trajectory is developed. The sequence of stages of the method for coordinating the planning of the ship's trajectory is performed cyclically until the target point of the route is reached. At each stage of the vessel's movement, the navigation obstacles and other vessels entering the area of interest of the navigator are monitored and potential hazards from them are identified. A method for tracing the vessel's movement and existing vessels in the navigator’s interest area has been developed, which allows for predicting the location at subsequent moments and identifying the coordinates of the conflict site where a situation of dangerous proximity occurs. To formalize the areas dangerous for vessel traffic, a method for generating a map of navigational hazards and conflict situations in the navigator’s interest area has been developed, based on a modified method of potential fields. To formally describe the space, only the concept of a potential function is used to represent the space as a matrix of values. The most significant scientific result is the proposed approach to solving the problem of supporting the decision-making of a navigator based on a combination of methods using fuzzy logic and allowed domains, which allows obtaining options for actions that ensure the safety of ship movement in a dangerous situation. Keywords: ship, navigator, collision, navigation situation, navigation systems, e-navigation, tracing method, navigation hazard, navigation hazard map

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Cao, Zhong Yi, Huai Liang Li, Pei Lin Liu e Yong Xin Chen. "Navigating Error Analysis for Acoustic Doppler Velocity Log". Applied Mechanics and Materials 303-306 (febbraio 2013): 453–58. http://dx.doi.org/10.4028/www.scientific.net/amm.303-306.453.

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Aiming to obtain higher navigation precision, this paper studied error sources of the acoustic Doppler Velocity Log (DVL) navigation system. Through analyzing the basic navigation equations of DVL, we knew that the acoustic navigating error was related to on-board attitude sensor error, velocity error and installation deviation error (array deviation angle and array eccentricity error). The author also derived the equations of random navigating errors and measure value errors, giving quantitative analysis of navigation error. Simulation shows the velocity error has more influence on the acoustic navigation error than others. The navigating precision can be promoted by increasing DVL precision, choosing high-precision attitude sensor and better installation error calibrating for acoustic array.

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Kopacz, Z., W. Morgaś e J. Urbański. "The Ship's Navigation Function, Ship's Navigation Processes, and Ship's Navigational Information". Journal of Navigation 56, n. 1 (gennaio 2003): 101–9. http://dx.doi.org/10.1017/s0373463302002060.

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This paper discusses the ship's navigation function, navigation processes, and navigational information. The relationship between these concepts and their substance are analysed in depth. However, the primary aim of this paper is to consider how the various types of navigational information and their content might be brought together in a logically defined structure as a Ship's Information System.

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Araújo, Dráulio B. de, Oswaldo Baffa e Ronald T. Wakai. "Theta Oscillations and Human Navigation: A Magnetoencephalography Study". Journal of Cognitive Neuroscience 14, n. 1 (1 gennaio 2002): 70–78. http://dx.doi.org/10.1162/089892902317205339.

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Magnetoencephalography (MEG) was used to study alpha and theta activity while subjects navigated through a computer-generated virtual reality town. The subjects were first allowed to explore the environment freely. They then had to navigate from a starting point to a destination, knowing that an obstruction would appear at one of several possible locations along the main route and force them to take a detour. Spatiotemporal analysis of the theta and alpha bands were performed (1) prior to the start of navigation, (2) from the start of navigation until the obstruction was encountered, (3) during the time subjects were contemplating a detour and were not navigating, and (4) from the resumption of navigation until the destination was reached. In all subjects, theta power was strongest during the two periods of navigation. The peak frequency of the oscillations was approximately 3.7 Hz. Control studies consisted of a motor task similar to that required for navigation, passive viewing of a tour through the same virtual reality town, and a mental concentration task. No consistent increases in theta power were seen in the MEG during any of the control tasks. The results suggest an association between theta rhythm and the performance of navigational tasks in humans.

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Palamarchuk, I. V. "MODELING THE DIVERGENCE OF SHIPS IN THE DECISION SUPPORT SYSTEM OF THE NAVIGATOR". Scientific Bulletin Kherson State Maritime Academy 1, n. 22 (2020): 45–53. http://dx.doi.org/10.33815/2313-4763.2020.1.22.045-053.

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The aim of the study is to develop modern conceptual approaches to the construction of decision support systems in navigation, to determine the theoretical and practical foundations for creating such systems and priority ways of their practical implementation. From the analysis of recent publications, it has been revealed that the widespread use of new information technologies and modern technical means of navigation leads to an increase in the detail of the present navigation situation, but at the same time its assessment becomes more complicated and the time available to the navigator for analysis and development of the necessary control decision is reduced. For this reason, the development of decision support systems (DSS) for the navigator, which use new meaningful models of the hazard identification process for navigating a ship in the event of prerequisites for an emergency, is an urgent task of the present time. The creation of such systems will reduce the negative impact of the human factor on the processes of ship traffic control. The article develops theoretical and practical foundations for constructing a DSS for a navigator, taking into account the peculiarities of the movement of ships, the process of human interaction with technical means of navigation. The article develops theoretical and practical foundations for constructing a DSS for a navigator, taking into account the peculiarities of the movement of ships, the process of human interaction with technical means of navigation. New mathematical models of control over the process of divergence of ships are proposed. The classification of ships according to the degree of danger is carried out, depending on the change in the angle of the line of their relative movement. Criteria for a quantitative assessment of the hazard level of a ships based on the analysis of changes in the angle of the line of its relative motion are presented. The results obtained are the basis for further increasing the efficiency of the functioning of the ergatic system «man - technical means of navigation» and the comprehensive implementation of the achievements of new information technologies in the ship control processes.

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Patel, Rickesh N., e Thomas W. Cronin. "Landmark navigation in a mantis shrimp". Proceedings of the Royal Society B: Biological Sciences 287, n. 1936 (7 ottobre 2020): 20201898. http://dx.doi.org/10.1098/rspb.2020.1898.

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Mantis shrimp commonly occupy burrows in shallow, tropical waters. These habitats are often structurally complex where many potential landmarks are available. Mantis shrimp of the species Neogonodactylus oerstedii return to their burrows between foraging excursions using path integration, a vector-based navigational strategy that is prone to accumulated error. Here, we show that N. oerstedii can navigate using landmarks in parallel with their path integration system, correcting for positional uncertainty generated when navigating using solely path integration. We also report that when the path integration and landmark navigation systems are placed in conflict, N. oerstedii will orientate using either system or even switch systems enroute. How they make the decision to trust one navigational system over another is unclear. These findings add to our understanding of the refined navigational toolkit N. oerstedii relies upon to efficiently navigate back to its burrow, complementing its robust, yet error prone, path integration system with landmark guidance.

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Peters, Kathy, Abhi Regmi e Reham Abdelhalim. "The co-development of a mobile navigation app in an integrated care network in Ontario, Canada". International Journal of Integrated Care 23, S1 (28 dicembre 2023): 585. http://dx.doi.org/10.5334/ijic.icic23562.

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Introduction: The complexity of navigating health and social care services is a common challenge to both providers and patients and their families. In the nineties, navigation programs arouse to assist cancer patients accessing services. Since then, those programs expanded to additional patient populations. Navigation programs can take various forms including virtual navigation. Virtual navigation in healthcare is a proactive process by which patients obtain information and support via internet resources to manage their illness demands. Approach: With a commitment to facilitate 24/7 access to its attributed population, Burlington Ontario Health Team (BOHT)-an integrated care network in Ontario- developed a mobile navigation app. Developing this app utilized experienced-based co-design approach. This approach took place via organizing a working group that included all stakeholders within the BOHT network of organizations and patient/caregiver partners. Over several months, the working group built potential personas of users, mapped their system navigation needs, created an inventory of navigation services within the network and designed the navigation app. Creation of the app was an iterative process including several testing and feedback loops to improve content and usability. Results: The first iteration of Burlington Navigation app was launched in Fall of 2021 accompanied by a comprehensive communication plan. The plan included digital signals at the hospital and primary care offices, social media posts and presentations to local providers including primary care physicians, community navigators. The first iteration focused on linking to health, social and community services offered by BOHT’s members and collaborators, and also services that were widely used in the community. Based on the feedback we received afterwards, the second iteration included links to provincial services. The third iteration includes capability to create a trusted account verified in the background by the same technology Interac uses. This will allow secure and seamless access to integrated services without a need for a separate username and password as well as access to the provincial patient portal Implications/highlights: Burlington Navigation app was the first community-based navigator app co-designed with patient partners, providers and community volunteers with lived experiences within the health and social care systems in Ontario. It resonated well with the users (providers and patients/caregivers) as local information became available at their fingertips. The success of the app allowed it to guide other OHTs on a similar digital navigator design journey. It also became the blueprint for a provincial solution for a multi-tenant navigator, which would allow multiple OHTs to showcase the local navigation information (based on geolocation) as well as provincial offerings. Conclusion: Sharing our journey co-developing the Burlington navigation app demonstrates that when local health integrated care networks utilize experienced-based co-design approaches to planning healthcare interventions, this has the potential to a) develop solutions that are well perceived by patients and providers and b) scale and spread these local solutions to larger-scale solutions that can improve the experiences of a wider spectrum of providers and patients.

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Dorner, W., F. Hau e R. Pagany. "PRIVATE GRAPHS – ACCESS RIGHTS ON GRAPHS FOR SEAMLESS NAVIGATION". ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XLI-B4 (14 giugno 2016): 579–86. http://dx.doi.org/10.5194/isprs-archives-xli-b4-579-2016.

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Abstract (sommario):

After the success of GNSS (Global Navigational Satellite Systems) and navigation services for public streets, indoor seems to be the next big development in navigational services, relying on RTLS – Real Time Locating Services (e.g. WIFI) and allowing seamless navigation. In contrast to navigation and routing services on public streets, seamless navigation will cause an additional challenge: how to make routing data accessible to defined users or restrict access rights for defined areas or only to parts of the graph to a defined user group? The paper will present case studies and data from literature, where seamless and especially indoor navigation solutions are presented (hospitals, industrial complexes, building sites), but the problem of restricted access rights was only touched from a real world, but not a technical perspective. The analysis of case studies will show, that the objective of navigation and the different target groups for navigation solutions will demand well defined access rights and require solutions, how to make only parts of a graph to a user or application available to solve a navigational task. The paper will therefore introduce the concept of private graphs, which is defined as a graph for navigational purposes covering the street, road or floor network of an area behind a public street and suggest different approaches how to make graph data for navigational purposes available considering access rights and data protection, privacy and security issues as well.

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Dorner, W., F. Hau e R. Pagany. "PRIVATE GRAPHS – ACCESS RIGHTS ON GRAPHS FOR SEAMLESS NAVIGATION". ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XLI-B4 (14 giugno 2016): 579–86. http://dx.doi.org/10.5194/isprsarchives-xli-b4-579-2016.

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Abstract (sommario):

After the success of GNSS (Global Navigational Satellite Systems) and navigation services for public streets, indoor seems to be the next big development in navigational services, relying on RTLS – Real Time Locating Services (e.g. WIFI) and allowing seamless navigation. In contrast to navigation and routing services on public streets, seamless navigation will cause an additional challenge: how to make routing data accessible to defined users or restrict access rights for defined areas or only to parts of the graph to a defined user group? The paper will present case studies and data from literature, where seamless and especially indoor navigation solutions are presented (hospitals, industrial complexes, building sites), but the problem of restricted access rights was only touched from a real world, but not a technical perspective. The analysis of case studies will show, that the objective of navigation and the different target groups for navigation solutions will demand well defined access rights and require solutions, how to make only parts of a graph to a user or application available to solve a navigational task. The paper will therefore introduce the concept of private graphs, which is defined as a graph for navigational purposes covering the street, road or floor network of an area behind a public street and suggest different approaches how to make graph data for navigational purposes available considering access rights and data protection, privacy and security issues as well.

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Schwering, Angela, Jakub Krukar, Jana Seep e Yousef Qamaz. "Individualization in Spatial Behaviour and Map Reading". AGILE: GIScience Series 4 (6 giugno 2023): 1–5. http://dx.doi.org/10.5194/agile-giss-4-41-2023.

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Abstract. For a long time, research has investigated spatial behaviour of people in navigation research and identified different wayfinding strategies. Researchers agree, that the environment with its structure and features influences the wayfinding strategies. The present paper presents a tool to investigate people’s strategies during navigation tasks. GeoGami, an educational geogame fostering navigational map reading skills, can be used to collect trajectories of people navigating through an environment. We developed a semantically annotated representation of the environment and clustered the resulting trajectories according to their spatio-temporal and semantic similarity. The result shows the existence of groups of common spatial patterns along with individual spatial behaviours that cannot be grouped into a cluster.

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Kim, Youngwon Ryan, Hyeonah Choi, Minwook Chang e Gerard J. Kim. "Applying Touchscreen Based Navigation Techniques to Mobile Virtual Reality with Open Clip-On Lenses". Electronics 9, n. 9 (5 settembre 2020): 1448. http://dx.doi.org/10.3390/electronics9091448.

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Abstract (sommario):

Recently, a new breed of mobile virtual reality (dubbed as “EasyVR” in this work), has appeared in the form of conveniently clipping on a non-isolating magnifying lenses on the smartphone, still offering a reasonable level of immersion to using the isolated headset. Furthermore, such a form factor allows the fingers to touch the screen and select objects quite accurately, despite the finger(s) being seen unfocused over the lenses. Many navigation techniques have existed for both casual smartphone 3D applications using the touchscreen and immersive VR environments using the various controllers/sensors. However, no research has focused on the proper navigation interaction technique for a platform like EasyVR which necessitates the use of the touchscreen while holding the display device to the head and looking through the magnifying lenses. To design and propose the most fitting navigation method(s) with EasyVR, we mixed and matched the conventional touchscreen based and headset oriented navigation methods to come up with six viable navigation techniques—more specifically for selecting the travel direction and invoking the movement itself—including the use of head-rotation, on-screen keypads/buttons, one-touch teleport, drag-to-target, and finger gestures. These methods were experimentally compared for their basic usability and the level of immersion in navigating in 3D space with six degrees of freedom. The results provide a valuable guideline for designing/choosing the proper navigation method under different navigational needs of the given VR application.

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LeClair, Amy M., Ariel Maschke, Charlotte Robbins, Dolma Tsering, Tracy A. Battaglia, Jennifer S. Haas, Karen M. Freund e Stephenie C. Lemon. "136 Implementing a Standardized Breast Cancer Patient Navigation Program to Advance Health Equity Across the City of Boston: Challenges and Opportunities". Journal of Clinical and Translational Science 6, s1 (aprile 2022): 10. http://dx.doi.org/10.1017/cts.2022.49.

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Abstract (sommario):

OBJECTIVES/GOALS: Translating Research into Practice (TRIP), a hybrid implementation pragmatic clinical trial and CTSA collaboration, aims to implement a standardized breast cancer patient navigation protocol across five sites in Boston, MA. The goal of this study was to assess individual and institutional barriers and facilitators to implementing this protocol. METHODS/STUDY POPULATION: From November 2019 to August 2020, researchers conducted ethnographic observations of Patient Navigators (PN) at three of the five participating sites. Each PN at each site was observed for two, four-hour blocks by researchers trained in ethnographic research. Observers took notes using TRIPs 11 Step Protocol as a guide, which includes identifying patients at risk for delays in care, screening and referring patients to resources for health-related social needs, and tracking patients across the care continuum. Fieldnotes were uploaded into Dedoose and coded deductively by four researchers using a comparison and consensus approach. Researchers analyzed the data to identify barriers and facilitators to both implementing each protocol step and maximizing navigations ability to promote health equity. RESULTS/ANTICIPATED RESULTS: Across all sites, PNs faced barriers to adhering to the TRIP Protocol due to practical workflow constraints including their level of engagement across the cancer care continuum. Although there are other staff members who engage in navigation activities, navigation is often viewed solely as the responsibility of the PN. Operationalizing navigation as a person rather than a process creates confusion around the role, and PNs are often seen as a catchall position when other staff do not know how to help a patient. The time that PNs spend on tasks unrelated to core navigation activities described in the TRIP Protocol prevents PNs from navigating patients most at risk for delays in care. A lack of continuity across the care continuum can create role confusion for the PNs. DISCUSSION/SIGNIFICANCE: Patient Navigation can promote health equity; however, any task that pulls PNs away from navigating patients most at risk for delays in care diminishes this potential. PNs abilities to enact the TRIP protocol, which they saw as valuable, is circumscribed by the extent to which navigation is operationalized as a process within the institution.

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Roland, Katherine B., Darrel H. Higa, Carolyn A. Leighton, Yuko Mizuno, Julia B. DeLuca e Linda J. Koenig. "Client Perspectives and Experiences With HIV Patient Navigation in the United States: A Qualitative Meta-Synthesis". Health Promotion Practice 21, n. 1 (9 ottobre 2019): 25–36. http://dx.doi.org/10.1177/1524839919875727.

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Abstract (sommario):

Patient navigation is increasingly utilized to link and (re)engage persons with HIV to care. Understanding client experiences with HIV patient navigation can facilitate intervention design and translation of evidence to practice. We conducted a qualitative meta-synthesis of client experiences with HIV patient navigation. Data were analyzed using thematic synthesis. We identified seven relevant studies; all collected data via in-depth interviews with persons with HIV who participated in HIV patient navigation. Four interrelated themes emerged from analysis that pertain to (1) the complexity of the health and social service environment and the holistic approaches taken by the navigator, (2) the profound significance of the client–navigator relationship, (3) client reluctance to end the navigation program, and (4) client self-efficacy and feelings of hope and psychological change as a result of their navigation experience. The unifying theme across all studies was the value and impact of the client–navigator relationship on client experience and quality of life. Programs should consider hiring navigators who possess strong relational skills and are peers of the clients, and clearly delineating the role of the navigator. Research should examine the impact of the client–navigator relationship on client outcomes and further investigate how participating in patient navigation affects client self-efficacy, client resiliency, and the role of posttraumatic growth to achieve improved HIV outcomes. This review underscores the significance of the relationship within intensive, multilevel interventions for individuals and communities marginalized and isolated from health and social service systems.

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Car, Maro, David Brčić, Srđan Žuškin e Boris Svilicic. "The Navigator’s Aspect of PNC before and after ECDIS Implementation: Facts and Potential Implications towards Navigation Safety Improvement". Journal of Marine Science and Engineering 8, n. 11 (26 ottobre 2020): 842. http://dx.doi.org/10.3390/jmse8110842.

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Abstract (sommario):

The global maritime digitalization reflects on navigation and paperless vessels with Paper Navigational Charts (PNC) nowadays superseded by Electronic Chart Display and Information System (ECDIS). Considering the system implementation and its acceptance as a sole navigational means, opinions of navigators differ. Although the ECDIS mandatory implementation ended in 2018, some navigators have been still favouring PNCs, pointing out their advantages over ECDIS navigation. These standpoints may have an impact on the safety of navigation in terms of acceptance, interpretation, and understanding of the system as well as on conflict of standpoints of decisive navigational ranks, the latter reason being found as one of the real problems. The presented study has focused on a specific period, soon after the transitional period completion, aiming to determine the views of traditional navigation advocates, their arguments in the present maritime navigation paperless era and to identify potential problems emerging from the conflict of two navigational means. The research has induced two independent, internationally distributed questionnaires, dedicated to navigational ranks. The first survey has referred to the period from 2012 to 2018, marking the transition to ECDIS navigation. The second survey was conducted after the implementation period completion date. The answers were analysed and discussed from the navigational ranks’ perspective, considering their competitiveness and the level of ECDIS education. The research results have indicated and confirmed that PNCs could not entirely be ruled out, at least at this stage. Besides definitive questionnaire answers, the findings have been supported with categorised comments as interpreted from the first survey questionnaire results. The paper aims to present the future of the PNCs, including possibilities of fusion with modern means. The proposed suggestions have been directed towards the benefits of maritime navigation safety, referring especially to disagreement between navigational ranks in terms of particular means acceptance.

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Buravtsova, J. "IMPLEMENTATION OF RIVER ELECTRONIC NAVIGATION SYSTEMS AND ONSHORE INFORMATION SERVICES ON THE INLAND WATERWAYS OF UKRAINE". Shipping & Navigation 32, n. 2 (12 dicembre 2021): 10–17. http://dx.doi.org/10.31653/2306-5761.32.2021.10-17.

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Abstract (sommario):

Within the framework of the existing ideas on the solution of problematic navigation situations related to ensuring the safety of vessel’s navigation, an assessment was made for determining the impact of e-Navigation on the level of safety, based on using current and important navigational information. The article shows the correct selection of the current and main components of navigational information, taking into account their interconnection, as well as increasing the assessment of the safety indicators of the ship's navigation. In order to develop inland navigation and meet the standards of the countries of the European Union, Ukraine must use modern systems to improve the level of safety on the inland waterway (IWW). The technical plan was developed, in particular, on the basis of assessment of the impact of e-navigation on reducing the number of navigational accidents for SOLAS and non-SOLAS vessels (the International Convention for the Safety of Life at Sea). The article is aimed at theoretical assessment of the potential of e-Navigation on IWW of Ukraine by examining and applying the IMO methodology for increasing navigational level. A case study was conducted on the concept of e-Navigation as a model to assess the impact of e-Navigation on the vessel’s safety. All segments of the transport process and logistics are integrated, as evidenced by global transport trends. As a result, a new type of transport infrastructure began to develop - transport, logistics and freight transport complexes, which formed a united system of interaction. The scientific and technical policy of the transport industry allows for the development of science, innovative technologies and the training system in all areas, including the encouragement of the development and implementation of innovative intelligent transport systems that ensure efficient management of traffic flows and vehicles, which suggests the main goal of improving quality of transport services. In connection with the constant technological development of the industry, it seems possible to further development of e-Navigation strategy as extremely accurate and systematic in ensuring the safety of navigation with prevention dangerous incidents, environmental protection and cost-effective systems. For the implementation of e-Navigation on the IWW of Ukraine, appropriate recommendations were developed.

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Czaplewski, Krzysztof, e Mariusz Wąż. "Improvement in Accuracy of Determining a Vessel’s Position with the Use of Neural Networks Ana Robust M-Estimation". Polish Maritime Research 24, n. 1 (1 marzo 2017): 22–31. http://dx.doi.org/10.1515/pomr-2017-0003.

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Abstract (sommario):

Abstract In the 21st century marine navigation has become dominated by satellite positioning systems and automated navigational processes. Today, global navigation satellite systems (GNSS) play a central role in the process of carrying out basic navigational tasks, e.g. determining the coordinates of a vessel’s position at sea. Since satellite systems are being used increasingly more often in everyday life, the signals they send are becoming more and more prone to jamming. Therefore there is a need to search for other positioning systems and methods that would be as accurate and fast as the existing satellite systems. On the other hand, the automation process makes it possible to conduct navigational tasks more quickly. Due to the development of this technology, all kinds of navigation equipment can be used in the process of automating navigation. This also applies to marine radars, which are characterised by a relatively high accuracy that allows them to replace satellite systems in performing classic navigational tasks. By employing M-estimation methods that are used in geodesy as well as simple neural networks, a software package can be created that will aid in automating navigation and will provide highly accurate information about a given object’s position at sea by making use of radar in comparative navigation. This paper presents proposals for automating the process of determining a vessel’s position at sea by using comparative navigation methods that are based on simple neural networks and geodetic M-estimation methods.

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Eichenbaum, Howard. "The role of the hippocampus in navigation is memory". Journal of Neurophysiology 117, n. 4 (1 aprile 2017): 1785–96. http://dx.doi.org/10.1152/jn.00005.2017.

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Abstract (sommario):

There is considerable research on the neurobiological mechanisms within the hippocampal system that support spatial navigation. In this article I review the literature on navigational strategies in humans and animals, observations on hippocampal function in navigation, and studies of hippocampal neural activity in animals and humans performing different navigational tasks and tests of memory. Whereas the hippocampus is essential to spatial navigation via a cognitive map, its role derives from the relational organization and flexibility of cognitive maps and not from a selective role in the spatial domain. Correspondingly, hippocampal networks map multiple navigational strategies, as well as other spatial and nonspatial memories and knowledge domains that share an emphasis on relational organization. These observations suggest that the hippocampal system is not dedicated to spatial cognition and navigation, but organizes experiences in memory, for which spatial mapping and navigation are both a metaphor for and a prominent application of relational memory organization.

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Katerynych, L. O., e N. V. Sazonov. "Research on methods of building an interactive map in a web application". PROBLEMS IN PROGRAMMING, n. 3-4 (dicembre 2022): 327–34. http://dx.doi.org/10.15407/pp2022.03-04.327.

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Abstract (sommario):

The purpose of this article is to formulate a list of rules for creating an efficient and convenient informational system for vicinity and building navigation and to create a web-app with this functionality. To accomplish this, a web-app user experience, navigation data representation options, their user perception and influence on their emotions were analyzed. Also, a list of recommendations for data representation and storing inside the app alongside with ways of fetching them was composed. General navigational application development practices were described in this work, a test version of an application was created to harvest users’ reviews and feedback and a "University interactive map" web-application for classroom, teacher rooms, departments, laboratories information displaying and navigating buildings and vicinities was created.

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Kristić, Miho, Srđan Žuškin, David Brčić e Sanjin Valčić. "Zone of Confidence Impact on Cross Track Limit Determination in ECDIS Passage Planning". Journal of Marine Science and Engineering 8, n. 8 (27 luglio 2020): 566. http://dx.doi.org/10.3390/jmse8080566.

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Abstract (sommario):

The technology breakthrough that Electronic Chart Display and Information System (ECDIS) has brought to modern navigation has the capability to improve the safety of navigation. This could be achieved only when the capabilities of the system are known by an end-user. Cross Track Limit (XTL) is an ECDIS safety parameter, set by the navigator, which enhances the navigational task automation in the function of workload reduction. Determination of factors affecting the value of XTL safety parameter, with special consideration to chart data reliability, is elaborated in this paper. Chart data reliability depends on the quality of chart survey data, which in many cases are outdated and unreliable. Analysis of past research on this subject is used to define the factors affecting XTL. Practices of different shipping companies with regards to XTL are analyzed and compared in order to confirm if there is a uniform practice between them. Nevertheless, shipping companies have a different or no practice of obtaining XTL, which allows the navigator to define safety parameters by a subjective opinion. In this paper, method of XTL determination for a specific vessel is suggested, considering previously defined factors. Finally, crucial influence of survey data to the safety of navigation is presented in this study.

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McCray, A. T., O. Bodenreider e J. A. Mitchell. "From Phenotype to Genotype: Issues in Navigating the Available Information Resources". Methods of Information in Medicine 42, n. 05 (2003): 557–63. http://dx.doi.org/10.1055/s-0038-1634383.

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Abstract (sommario):

Summary Objectives: As part of an investigation of connecting health professionals and the lay public to both disease and genomic information, we assessed the availability and nature of the data from the Human Genome Project relating to human genetic diseases. Methods: We focused on a set of single gene diseases selected from main topics in MEDLINEplus, the NLM’s principal resource focused on consumers. We used publicly available websites to investigate specific questions about the genes and gene products associated with the diseases. We also investigated questions of knowledge and data representation for the information resources and navigational issues. Results: Many online resources are available but they are complex and technical. The major challenges encountered when navigating from phenotype to genotype were (1) complexity of the data, (2) dynamic nature of the data, (3) diversity of foci and number of information resources, and (4) lack of use of standard data and knowledge representation methods. Conclusions: Three major informatics issues arise from the navigational challenges. First, the official gene names are insufficient for navigation of these web resources. Second, navigational inconsistencies arise from difficulties in determining the number and function of alternate forms of the gene or gene product and maintaining currency with this information. Third, synonymy and polysemy cause much confusion. These are severe obstacles to computational navigation from phenotype to genotype, especially for individuals who are novices in the underlying science. Tools and standards to facilitate this navigation are sorely needed.

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E, Topolskov, Beljaevskiy L. L e Serdjuke A. "IMPROVEMENT OF NAVIGATION SYSTEMS OF VEHICLES BY MEANS OF INERTIAL SENSORS AND INFORMATION PROCESSING USING PROBABILITY-GEOMETRIC METHODS". National Transport University Bulletin 1, n. 46 (2020): 353–64. http://dx.doi.org/10.33744/2308-6645-2020-1-46-353-364.

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Abstract (sommario):

Providing high accuracy of the coordinates and trajectories of objects by measurements conducted in navigation systems and complexes is an urgent task, which improves safety and efficiency of different modes of transport. However difficult environmental conditions, where vehicles are commonly used, stipulate influence of different factors on performance of onboard satellite navigation receivers, which are used as basic navigation devices for ground vehicle nowadays. Setting on cars used for common purposes additional navigation devices, which provide better performance, in most cases is economically unreasonable. Economically reasonable ways to improve onboard navigation complexes of vehicles, which are used for common purposes, are examined in this article. Functional diagram and principles of work of navigational complex, which uses the satellite navigation receiver and simplified variant of inertial navigation system is pointed as well. Also, the justification of methods for minimizing the error formats of coordinates and trajectories of moving objects based on information processing in multipositional, in particular satellite-inertial navigation systems and complexes, is presented. The obtained research results give an opportunity to develop an algorithm for coordinate refinement, which can be implemented in the improved on-board navigational complex of vehicle. KEY WORDS: NAVIGATION SYSTEMS AND COMPLEXES, INERTIAL SENSORS, NAVIGATION DEFINITIONS, ACCURACY AND RELIABILITY OF COORDINATES AND TRAJECTORIES OF MOVING OBJECTS, ELLIPS OF ERRORS, PROBABILISTIC-GEOMETRIC METHODS.

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Turygin, Yuri, Pavol Božek, Yuri Nikitin, Ella Sosnovich e Andrey Abramov. "Enhancing the reliability of mobile robots control process via reverse validation". International Journal of Advanced Robotic Systems 13, n. 6 (1 dicembre 2016): 172988141668052. http://dx.doi.org/10.1177/1729881416680521.

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Abstract (sommario):

The article deals with integrating the inertial navigation unit implemented into the system of controlling the robot. It analyses the dynamic properties of the sensors of the inertial unit, for example, gyroscopes and accelerometers. The implementation of the original system of controlling the mobile robot on the basis of autonomous navigation systems is a dominant part of the article. The integration of navigational information represents the actual issue of reaching higher accuracy of required navigational parameters using more or less accurate navigation systems. The inertial navigation is the navigation based on uninterrupted evaluation of the position of a navigated object by utilizing the sensors that are sensitive to motion, that is, gyroscopes and accelerometers, which are regarded as primary inertial sensors or other sensors located on the navigated object.

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Ostroumov, Ivan, Nataliia Kuzmenko e Volodymur Kharchenko. "AN AIRSPACE ANALYSIS ACCORDING TO AREA NAVIGATION REQUIREMENTS". Aviation 23, n. 2 (27 maggio 2019): 36–42. http://dx.doi.org/10.3846/aviation.2019.10302.

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Abstract (sommario):

Aircraft navigation within controlled airspace is carried out using on-board positioning systems capable to determine the coordinates of aircraft location with the system performance that meet navigation specifications requirements. The article proposes a descriptive set theory use to navigational aids network analysis in order to determine the positioning performance of the navigation system at predefined airspace volume. The uniqueness of the study is shape evaluation of areas that correspond to navigation specifications requirements and area research of different positioning techniques based on navigational aids such as DME/DME, VOR/DME, and VOR/VOR. An analysis of Ukrainian airspace has been done as an example.

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40

May, Andrew J., Tracy Ross e Steven H. Bayer. "Drivers' Information Requirements when Navigating in an Urban Environment". Journal of Navigation 56, n. 1 (gennaio 2003): 89–100. http://dx.doi.org/10.1017/s0373463302002114.

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Abstract (sommario):

Navigating in unfamiliar road environments is a common and demanding cognitive activity. If this cannot be accomplished successfully, there are implications for increased driver workload, delays due to navigation errors, potentially unsafe road behaviour such as late lane changes, and inappropriate traffic management. To enable successful navigation through such environments, it is necessary to understand what the navigation task entails, and what a driver's corresponding information requirements are. This paper reports the results of a study that sought to identify what information is used by drivers when navigating within a range of urban driving environments, how this information is used, and what the implications are for the design of navigation aids.

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Tomasila, Leopold A., Lolita C. Tuhumena, Silvester Sinau, Yvonne I. Pattinaja e Sara Umbekna. "Pengenalan Alat Navigasi, Keselamatan dan Kesehatan pada Kapal Penangkap Ikan Enterprise di Perairan Selat Makassar". Amanisal: Jurnal Teknologi dan Manajemen Perikanan Tangkap 12, n. 2 (1 dicembre 2023): 47–56. http://dx.doi.org/10.30598/amanisalv12i2p47-56.

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Abstract (sommario):

On voyage fishing vessel should be equipped with proper navigation equipment. Cadets who will be working onboard of a fishing vessel should understanding and aware of navigational equipment, safety equipment and healthy equipment. Because ,it could cause accident and awareness on navigational equipment. One of the ways for cadets to understand about navigation equipment are Maps, Campasses, Global Positioning System, Radia and Automatic Identification System. Each of these navigation equipment are hhaving their own function and operating system. So, it is a mandatory for every cadets to understand and aware in operating sthes navigation and know about safety equipment and healthy equipment on Enterprise fishing vessel .

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Tomasila, Leopold A., Lolita C. Tuhumena, Silvester Sinau, Yvonne I. Pattinaja e Sara Umbekna. "Pengenalan Alat Navigasi, Keselamatan dan Kesehatan pada Kapal Penangkap Ikan Enterprise di Perairan Selat Makassar". Amanisal: Jurnal Teknologi dan Manajemen Perikanan Tangkap 12, n. 2 (1 dicembre 2023): 102–17. http://dx.doi.org/10.30598/amanisalv12i2p102-117.

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Abstract (sommario):

On voyage fishing vessel should be equipped with proper navigation equipment. Cadets who will be working onboard of a fishing vessel should understanding and aware of navigational equipment, safety equipment and healthy equipment. Because ,it could cause accident and awareness on navigational equipment. One of the ways for cadets to understand about navigation equipment are Maps, Campasses, Global Positioning System, Radia and Automatic Identification System. Each of these navigation equipment are hhaving their own function and operating system. So, it is a mandatory for every cadets to understand and aware in operating sthes navigation and know about safety equipment and healthy equipment on Enterprise fishing vessel .

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Nosov, P. S., I. V. Palamarchuk, S. M. Zinchenko, Ya A. Nahrybelnyi, I. S. Popovych e ,. H. V. Nosova. "Development of means for experimental identification of navigator attention in ergatic systems of maritime transport". Bulletin of the Karaganda University. "Physics" Series 97, n. 1 (30 marzo 2020): 58–69. http://dx.doi.org/10.31489/2020ph1/58-69.

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The article discusses the issues of identification of models of analysis of the navigational situation by the navigator during the passage in narrow places and port areas; this is especially relevant in critical situations. As part of the research, an analysis of literary sources was carried out, which made it possible to characterize this direction as actual for the development of special means of an experimental nature. As the main goal, the article presents formal-logical approaches to the development of software and hardware means for determining the areas of attention of the navigator as a subject of an ergatic system. A mechanism was determined for the formation the indexes of the analytical activities of the navigator during assessing the situation, mathematical models, and means for clarifying the position of the navigator on the navigation bridge. A geometric approximation of indexes was proposed, the metric of which can significantly reduce the identification time of critical situations and prevent negative consequences. The carried experiments by using the certified navigation simulator Navi Trainer 5000 confirmed the effectiveness and practical value of the proposed approaches, which will greatly improve the retraining of marine crew.

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Zhang, Xiaochen, Lingling Jin, Jie Zhao, Jiazhen Li, Ding-Bang Luh e Tiansheng Xia. "The Influences of Different Sensory Modalities and Cognitive Loads on Walking Navigation: A Preliminary Study". Sustainability 14, n. 24 (13 dicembre 2022): 16727. http://dx.doi.org/10.3390/su142416727.

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External cognitive burden has long been considered an important factor causing pedestrian navigation safety problems, as pedestrians in navigation inevitably acquire external information through their senses. Therefore, the influences of different types of sensory modalities and cognitive loads on walking navigation are worthy of in-depth investigation as the foundation for improving pedestrians’ safety in navigation. This study investigated users’ performance in visual, auditory, and tactile navigation under different cognitive loads by experimental simulation. Thirty-six participants were recruited for the experiment. A computer program simulating walking navigation was used, and three different cognitive task groups were set up. Participants’ reaction times and performances were recorded during the experiment, and a post-test questionnaire was administered for evaluation purposes. According to the tests, the following points are summarized. First, visual navigation performed the best in load-free conditions, which was significantly faster than auditory navigation and tactile navigation, but the difference between the latter two was not significant. There was a significant interaction between navigation types and cognitive load types. Specifically, in the condition without load, reaction time in auditory navigation was significantly slower than those in visual navigation and tactile navigation. In the condition with auditory load, reaction time in visual navigation was significantly faster than those in auditory navigation and tactile navigation. In the condition with visual load, there were no significant differences among the three navigations.

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Stavrinidis, Stavros, e Paraskevi Zacharia. "An ANFIS-Based Strategy for Autonomous Robot Collision-Free Navigation in Dynamic Environments". Robotics 13, n. 8 (22 agosto 2024): 124. http://dx.doi.org/10.3390/robotics13080124.

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Autonomous navigation in dynamic environments is a significant challenge in robotics. The primary goals are to ensure smooth and safe movement. This study introduces a control strategy based on an Adaptive Neuro-Fuzzy Inference System (ANFIS). It enhances autonomous robot navigation in dynamic environments with a focus on collision-free path planning. The strategy uses a path-planning technique to develop a trajectory that allows the robot to navigate smoothly while avoiding both static and dynamic obstacles. The developed control system incorporates four ANFIS controllers: two are tasked with guiding the robot toward its end point, and the other two are activated for obstacle avoidance. The experimental setup conducted in CoppeliaSim involves a mobile robot equipped with ultrasonic sensors navigating in an environment with static and dynamic obstacles. Simulation experiments are conducted to demonstrate the model’s capability in ensuring collision-free navigation, employing a path-planning algorithm to ascertain the shortest route to the target destination. The simulation results highlight the superiority of the ANFIS-based approach over conventional methods, particularly in terms of computational efficiency and navigational smoothness.

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Burnett, Adrian. "Navigation Philosophy Past and Future". Journal of Navigation 46, n. 3 (settembre 1993): 306–15. http://dx.doi.org/10.1017/s0373463300011735.

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In his Presidential Address at the 45th Annual General Meeting in October 1991, Norman Dahl gave a thought-provoking discussion of the future of the navigator. He suggested that the navigator's trade is not just a changing trade, but a vanishing one. He proposed then, and subsequently in his 1993 Anderson Memorial Lecture (reproduced as the previous paper in this issue of the Journal), that consideration should be given to the future of navigation, the future of the navigator and the future of the Institute.In this contribution, papers and addresses over the history of the Institute are examined critically to extract insights into navigation applicable to the present era. These are used to discuss and develop the meanings of the terms ‘navigator’ and ‘navigation’.

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Fedik, Lesya, Inna Kondius, Roman Grudetsky e Natalya Zubovetskaya. "ANALYSIS OF NAVIGATION SYSTEMS OF CARS AS AUTOMATION SYSTEMS". International Scientific Technical Journal "Problems of Control and Informatics 67, n. 4 (1 settembre 2022): 116–25. http://dx.doi.org/10.34229/2786-6505-2022-4-9.

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The article states that the car navigator is widely used in our time. It also outlines the features of the use of global navigation satellite systems as one of the best for car navigators. The history of the first satellite navigation system Transit is described. In addition, an analysis was made of the principles of operation, main features, shortcomings, location and compatibility of such existing global navigation satellite systems as NAVSTAR-GPS, GLONASS, Galileо, Beidou, QZSS (Michibiki), NavIC. The article notes that the best performance indicators were obtained by devices using global navigation systems GLONASS and GPS. The comparative characteristics of the existing types of car navigation systems, in particular: regular, autonomous ones, are given. and navigation software for portable computers and systems. It also describes the feature of operation and power supply of the most commonly used regular car navigation system. The article reflects the principle of operation and the device of a standard car GPS navigator, as one of the best. It was also noted that a portable computer and a regular smartphone with installed navigation programs, detailed up-to-date maps and step-by-step instructions, in contrast to embedded systems, are considered to be a popular navigation system among users. The principle of operation of all brands of car navigators is outlined. Considerable attention is paid to the assessment of the advantages and disadvantages of popular brands of regular car navigation systems, such as: Garmin, TomTom, Magellan. As a result of the study, the features of paid and free car navigator programs that have become widespread among car drivers are presented, such as Yandex Navigator, iGo Primo, TomTom, Waze, Google maps, Autosputnik, OsmAnd, 2GIS, Sygic Car.

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Myers, Janet J., Kimberly A. Koester, Mi-Suk Kang Dufour, Alison O. Jordan, Jacqueline Cruzado-Quinone e Alissa Riker. "Patient navigators effectively support HIV-infected individuals returning to the community from jail settings". International Journal of Prisoner Health 13, n. 3/4 (11 settembre 2017): 213–18. http://dx.doi.org/10.1108/ijph-08-2016-0037.

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Purpose Patient navigation is an evidence-based approach for enhancing medical and support service co-ordination and ensuring linkage to medical care for people living with HIV released from jail. The paper aims to discuss this issue. Design/methodology/approach This brief describes the benefits of patient navigation and issues to consider when implementing a navigator program. The authors use process data to describe the type and amount of navigation services delivered as part of a randomized study, the “The San Francisco Navigator Project.” Findings Navigation programs are able to accommodate a range of service needs; most clients required multiple types of services, particularly during the first two months after release. Originality/value Navigation programs should be prioritized because they provide unique and essential support for people leaving jail during the particularly vulnerable time immediately after release navigation plays a crucial role in retaining individuals in care and preventing onward transmission of HIV.

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Taube, Jeffrey S., Stephane Valerio e Ryan M. Yoder. "Is Navigation in Virtual Reality with fMRI Really Navigation?" Journal of Cognitive Neuroscience 25, n. 7 (luglio 2013): 1008–19. http://dx.doi.org/10.1162/jocn_a_00386.

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Identifying the neural mechanisms underlying spatial orientation and navigation has long posed a challenge for researchers. Multiple approaches incorporating a variety of techniques and animal models have been used to address this issue. More recently, virtual navigation has become a popular tool for understanding navigational processes. Although combining this technique with functional imaging can provide important information on many aspects of spatial navigation, it is important to recognize some of the limitations these techniques have for gaining a complete understanding of the neural mechanisms of navigation. Foremost among these is that, when participants perform a virtual navigation task in a scanner, they are lying motionless in a supine position while viewing a video monitor. Here, we provide evidence that spatial orientation and navigation rely to a large extent on locomotion and its accompanying activation of motor, vestibular, and proprioceptive systems. Researchers should therefore consider the impact on the absence of these motion-based systems when interpreting virtual navigation/functional imaging experiments to achieve a more accurate understanding of the mechanisms underlying navigation.

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Hunleth, Jean, e Emily Steinmetz. "Navigating Breast Cancer Screening in Rural Missouri: From Patient Navigation to Social Navigation". Medical Anthropology 41, n. 2 (20 gennaio 2022): 228–42. http://dx.doi.org/10.1080/01459740.2021.2015347.

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