Navigation - Science topic

Civilian services of Global Navigation Satellite System are threatened by spoofing attacks since it is hard to determine the authenticity of a navigation signal with a detailed structure open to the public. Signal authentication effectively protects the security of the signal by attaching unforgeable information to one or several elements of the si...

A new Precise Point Positioning (PPP) service, called the PPP-B2b service, has been implemented in the BeiDou-3 Navigation Satellite System (BDS-3), which brings new opportunities for time transfer. However, the solution using the traditional PPP method with the PPP-B2b correction still absorbs some unknown errors and needs reconverging when there...

Design thinking is widely recognized as an alternative approach to innovation, but it can be challenging to implement, often conflicting with organizational structures, cultures, and processes. The practise of design thinking calls for a new mindset that moves past conventional approaches to innovation, and embraces ambiguity, risk-taking, and coll...

This three part paper explores how the approaches of cybernetics (a field investigating how complex systems- brains, individuals, societies and machines navigate their realities) have influenced education and psychology over time. The first part recounts the establishment of first-order cybernetics, and the emergence of an observer driven approach...

The 3rd European Workshop on Maritime Systems Resilience and Security (MARESEC) is dedicated to the research on Resilience, Security, Technology and related Ethical, Legal, and Social Aspects (ELSA) in the context of Maritime Systems, including but not restricted to (Offshore/Onshore) Infrastructures, Navigation and Shipping and Autonomous Systems....

The theme of this textbook revolves around how machine learning (ML) can help civil and environmental engineers transform their domain. This textbook hopes to deliver the knowledge and information necessary to educate engineering students and practitioners on the principles of ML and how to integrate these into our field. This textbook is about nav...

This research aims to assess the optimum route proposal system for a four-hull automated navigation vessel ”Quadmaran” by conducting actual sea tests and simulations. The route proposal system is mainly built based on considerations of obstacle avoidance, navigation performance, and operation of multiple vessels. In this paper, the optimal route pr...

We present an approach for estimating a mobile robot's pose w.r.t. the allocentric coordinates of a network of static cameras using multi-view RGB images. The images are processed online, locally on smart edge sensors by deep neural networks to detect the robot and estimate 2D keypoints defined at distinctive positions of the 3D robot model. Robot...

Since its inception, the role of social media as part of the public sphere has been debated. In this chapter, we examine one specific challenge related to social media, namely the Shinigami Eyes web browser extension. The extension is developed as a tool to aid trans people and their allies in identifying and avoiding transphobic users and content,...

This paper proposes a novel observer-based controller for Vertical Take-Off and Landing (VTOL) Unmanned Aerial Vehicle (UAV) designed to directly receive measurements from a Vision-Aided Inertial Navigation System (VA-INS) and produce the required thrust and rotational torque inputs. The VA-INS is composed of a vision unit (monocular or stereo came...

Older adults often struggle to locate a function quickly in feature-rich user interfaces (UIs). Mobile UIs not only pack a ton of features in a small screen but also get frequent updates to their visual layouts-thereby exacerbating the problem. This paper explores a design solution where users could search for a pertinent UI feature using spoken-wo...

This paper presents the design and evaluation of GestureExplorer, an Immersive Analytics tool that supports the interactive exploration, classification and sensemaking with large sets of 3D temporal gesture data. GestureExplorer features 3D skeletal and trajectory visualisations of gestures combined with abstract visualisations of clustered sets of...

Smartphones conveniently place large information spaces in the palms of our hands. While research has shown that larger screens positively affect spatial memory, workload, and user experience, smartphones remain fairly compact for the sake of device ergonomics and portability. Thus, we investigate the use of hybrid user interfaces to virtually incr...

Getting from A to B has never been easier. Mobile navigation systems allow universal access to spatial information. However, following detailed route instructions leads to a decrease in spatial exploration behaviour and therefore a reduction of spatial knowledge acquisition. Facilitating spatial exploration has the potential to counteract this nega...

General circulation of Persian Gulf has a cyclonic pattern that affected by tide, wind stress and thermohaline force. Although tidal force is very effective in values of current speed, but thermohaline force is dominant in long time because tidal forcing has a short period and returning nature. Tide and density parameters are important in navigatin...

Environmental DNA (eDNA) metabarcoding emerges as a powerful method, allowing a more exhaustive investigation of fish fauna than any other methods. Yet, the general use of eDNA as a replacement of traditional methods such as visual surveys or physical sampling remains debatable. Therefore, a prior understanding of eDNA’s spatial resolution is neces...

Dense real-time tracking and mapping from RGB-D images is an important tool for many robotic applications, such as navigation and manipulation. The recently presented Directional Truncated Signed Distance Function (DTSDF) is an augmentation of the regular TSDF that shows potential for more coherent maps and improved tracking performance. In this wo...

The collection of data on accidents in inland navigation is not mandatory in many European countries. The lack of a harmonized methodology or a centralized database of information on accidents makes it difficult to have a comprehensive picture of safety on European inland waterways. The problem becomes particularly evident in light of significant n...

Nonlinear model predictive control (NMPC) is an efficient and proven method for optimization-based autonomous vehicle motion planning. Among the various approaches, the iterative linear quadratic regulator, a differential dynamic programming variant, is a well-known efficient nonlinear optimization method. In safety-critical control systems, contro...

This study follows Olive-a beginning teacher who participated in a capstone course Mathematical Reasoning and Proving for Secondary Teachers, which included school-based teaching experience, followed by a year-long internship, in which Olive taught collaboratively with her cooperating teacher. By drawing upon Activity Theory, we compare her teachin...

When a mobile robot is asked to navigate intelligently in an environment, it needs to estimate its own and the environment's state. One of the popular methods for robot state and position estimation is particle filtering (PF). Visual Teach and Repeat (VT&R) is a type of navigation that uses a camera to navigate the robot along the previously traver...

In recent years, the use of multiple unmanned aerial vehicles (UAVs) in various applications has progressively increased thanks to advancements in multi-agent system technology, which enables the accomplishment of complex tasks that require cooperative and coordinated abilities. In this article, multi-UAV applications are grouped into five classes...

The subionospheric early very low frequency (VLF) perturbations observed on NWC (19.8 kHz) navigational transmitter signal monitored at a low‐latitude station, Suva (18.1°S, 178.5°E), Fiji, during campaign periods of November 2011, 2012, and 2014 and December 2014, are presented. Early VLF events are associated with D‐region conductivity changes ma...

Objective: Fluoroscopy is often used in the surgery of unstable pelvic ring fractures, and improved safety in implant placement is an issue. An anterior subcutaneous pelvic fixator (INFIX) combined with a percutaneous screw has been reported to be a minimally invasive and effective surgical technique for unstable pelvic ring injuries. However, alt...

Reading and interpreting a map represents an essential part of daily life, enabling appropriate orientation and navigation through space. Based on the idea that perceptual analogical reasoning is critical in aligning the spatial structure of the map with the spatial structure of the space and given the critical role of language, especially spatial...

Successful research environment requires joint effort by individual researchers, research groups and the organization. This chapter describes the basic principles and good research practices in the context of the research environment and serves as a guide to good, responsible research for research newcomers – researchers at the beginning of their s...

Citation: Pérez Sanz, L.; Martínez García-Gasco, C.; Pérez Maroto, M.; Pérez-Castán, J.A.; Serrano-Mira, L.; Gómez Comendador, V.F. Performance-Based Navigation Approach Procedures with Barometric Vertical Guidance: How to Select the Air Temperature for Approach Procedure Design. Aerospace 2023, 10, 337. https:// Abstract: In performance-based navi...

Leadership is an important component to the success of any business. It gives direction and momentum to the business thus allowing it to avoid risk, maximize productivity and remain cohesive both within and without the company (Ardichvili et al. 2009; Thompson, 2021). The impact of leadership in a business has prompted many scholars to determine th...

Previous studies of GNSS-IR mainly focused on the legacy L1C signal; the potential of modernized signals (L2C and L5Q) has not yet been fully exploited. In this paper, we applied the Multichannel Singular Spectrum Analysis (M-SSA) method to extract common interference patterns from different frequencies simultaneously. The three-frequency (L1C, L2C...

In recent years, commercial and research interest in service robots working in everyday environments has grown. These devices are expected to move autonomously in crowded environments, maximizing not only movement efficiency and safety parameters, but also social acceptability. Extending traditional path planning modules with socially aware criteri...

Many perception systems in mobile computing, autonomous navigation, and AR/VR face strict compute constraints that are particularly challenging for high-resolution input images. Previous works propose nonuniform downsamplers that "learn to zoom" on salient image regions, reducing compute while retaining task-relevant image information. However, for...

Recently, deep reinforcement learning (DRL)-based trajectory planning methods have been designed for manipulator trajectory planning, given their potential in solving the problem of multidimensional spatial trajectory planning. However, many DRL models that have been proposed for manipulators working in dynamic environments face difficulties in obt...

This special issue aims to provide a comprehensive overview of the current state of the Bayesian Brain Hypothesis and its standing across neuroscience, cognitive science and the philosophy of cognitive science. By gathering cutting-edge research from leading experts, this issue seeks to showcase the latest advancements in our understanding of the B...

This work deals with the closed-loop altitude control of a hybrid unmanned aerial-underwater vehicle (HUAUV) during media transition. Researches about HUAUVs are important for hard-to-reach operations. There are already several studies developed for unmanned vehicles, either in air or underwater. However, research on HUAUVs is a recent topic. There...

In response to the severe energy-saving and emission-reduction situation, it is of great practical significance to reduce the fuel consumption of ships’ main engines and carbon dioxide emissions, and to realize the energy-saving and emission reduction of ships. In this study, We use the particle swarm optimization algorithm to optimize and analyze...

Schizophrenia has long been thought to be a disconnection syndrome and several previous studies have reported widespread abnormalities in white matter tracts in individuals with schizophrenia. Furthermore, reductions in structural connectivity may also impair communication between anatomically unconnected pairs of brain regions, potentially impacti...

Algorithm engineering is sometimes portrayed as a new 21 st century return of manipulative social engineering. Yet algorithms are necessary tools for individuals to navigate online platforms. Algorithms are like a sensory apparatus through which we perceive online platforms: this is also why individuals can be subtly but pervasively manipulated by...

Over the past two decades, there has been a growing demand for generating digital surface models (DSMs) in real-time, particularly for aircraft landing in degraded visual environments. Challenging landing environments can hinder a pilot’s ability to accurately navigate, see the ground, and avoid obstacles that may lead to equipment damage or loss o...

As we continue to embrace the convenience and connectivity of the Internet of Things (IoT), it's becoming increasingly important to be aware of the security risks involved. From smart home devices to industrial systems, IoT technology is being integrated into every aspect of our lives, but with this comes the potential for cyber attacks and data br...

The article is about digitalizing support for the development of competencies and skills for improved international scientific cooperation mobilities in Higher Education. It discusses the conceptual and research processes undertaken and the technology implemented for the structuring and implementation of an e-Toolkit for this purpose. Numerous scho...

An instrumental case study was conducted to document the impacts virtual learning had on two university students during the coronavirus disease-2019 (COVID-19) pandemic through cogni-tive and sociocultural approaches. This study provides an analysis of schemata presenting as a contributing factor to transfer and accumulation of knowledge and positi...

The modes through which individuals disperse prior to reproduction has important consequences for gene flow in populations. In honey bees (Apis sp.), drones (males) reproduce within a short flight range of their natal nest, leaving and returning each afternoon within a narrow mating window. Drones are assumed to return to their natal nests as they...

p>Rapid development of artificial intelligence (AI) has permeated various aspects of our lives. Its usage in the field of healthcare has shown significant improvement in the efficiency and efficacy of numerous aspects of healthcare services. However, wide applications of AI technologies in healthcare are also joined by ethical challenges threatenin...

Food systems face new climatic and socioecological challenges and farmers need a diversity of new plant varieties to respond to these. While plant breeding is important, institutional innovations in seed systems are critical to ensure that new traits and varieties make their way into farmers' fields. This Perspective reviews the state of knowledge...

p>A probabilistic controller, for robot navigation with behaviors, is designed using the basic mathematical framework of quantum computing. The controller changes behavior probabilities following sensor readings, behaviors depend on arena and platform properties, not just obstacles, also controller gains can be programmed by direct external signals...

The surrounding waters of Taiwan are evaluated as a moderate risk environment by Casualty Return, Lloyd’s Registry of Shipping. Among all types of maritime accidents, ship collisions occur most often, which has severe consequences, including ship damage, sinking and death of crews, and destruction of marine environments. It is, therefore, imperativ...

p>A probabilistic controller, for robot navigation with behaviors, is designed using the basic mathematical framework of quantum computing. The controller changes behavior probabilities following sensor readings, behaviors depend on arena and platform properties, not just obstacles, also controller gains can be programmed by direct external signals...

According to the statistics of ship traffic accidents on inland waterways, potential safety hazards such as stranding, hitting rocks, and suspending navigation are on the increase because of the sudden rise and fall of the water level, which may result in fatalities, environmental devastation, and massive economic losses. In view of this situation,...

Recent studies have focused on developing advanced assistive devices to help blind or visually impaired people. Navigation is challenging for this community; however, developing a simple yet reliable navigation system is still an unmet need. This study targets the navigation problem and proposes a wearable assistive system. We developed a smart glo...

1 УДК 629.7.05 СРАВНЕНИЕ ДВУХ РЕЖИМОВ ПРИМЕНЕНИЯ ОДОМЕТРА ДЛЯ КОРРЕКЦИИ БИНС Б.В.Климкович, главный научный сотрудник «ОКБ ТСП», кандидат физико-математических наук, действительный член международной академии навигации и управления движением, член редакционной коллегии журнала «Гироскопия и навигация» г.Минск, Республика Беларусь B.Klimkovich, Prin...

The success of any degree program being delivered by higher education institutions is measured using the employment performance of its graduates as they navigate the dynamic labor market after completion of their studies. The tool used to gauge this metric is known as a graduate tracer study. Thus, this explanatory sequential mixed methods study ma...

Real-time satellite clock offset is a crucial element for real-time precise point positioning (RT-PPP). However, the elapsed time for undifferenced (UD) multi-global navigation satellite system (GNSS) real-time satellite clock offset estimation at each epoch is increased with the growth of stations, which may fall short of real-time application req...

Decades of research suggest that our political differences are best captured by two dimensions of political ideology. The dual evolutionary framework of political ideology predicts that these dimensions should be related to variation in social preferences for cooperation and group conformity. Here, we combine data from a New Zealand survey and a su...

In contemporary development, autonomous vehicles (AVs) have emerged as a potential solution for sustainable and smart transportation to fulfill the increasing mobility demands whilst alleviating the negative impacts on society, the economy, and the environment. AVs completely depend on a machine to perform driving tasks. Therefore, their quality an...

The determination of the absolute and relative position of a spacecraft is critical for its operation, observations, data analysis, scientific studies, as well as deep space exploration in general. A spacecraft that can determine its own absolute position autonomously may perform more than that must rely on transmission solutions. In this work, we...

Virtual-assisted lung mapping (VAL-MAP) is a preoperative bronchoscopic multispot dye-marking technique used in sublobar lung resection of barely palpable lung nodules. This review summarizes the history and outcomes of the VAL-MAP procedure. VAL-MAP was developed in 2012, and long-term outcomes of lung resection using VAL-MAP have recently been ve...

We propose a spatial-constraint approach for modeling spatial-based interactions and enabling interactive visualizations, which involves the manipulation of visualizations through selection, filtering, navigation, arrangement, and aggregation. We proposes a system that activates static visualizations by adding intelligent interactions, which is ach...

Many Autonomous Underwater Vehicles (AUVs) need to cope with hazardous underwater medium using a limited computational capacity while facing unknown kinematics and disturbances. However, most algorithms proposed for navigation in such conditions fail to fulfil all conditions at the same time. In this work, we propose an optimal control method, base...

We propose a novel method for autonomous legged robot navigation in densely vegetated environments with a variety of pliable/traversable and non-pliable/untraversable vegetation. We present a novel few-shot learning classifier that can be trained on a few hundred RGB images to differentiate flora that can be navigated through, from the ones that mu...

The current research aims to enhance the humanoid NAO’s ability to plan their overall routes through static and dynamic terrains. The strategy is based on the fusion of the modified hyperbolic gravitational search algorithm and dynamic window approach (DWA) for the navigation of humanoids in various complex terrains. While the updated GSA enhances...

Although millions of community members have come together in various ways to sponsor and resettle refugees for decades, scholars are just now beginning to study why people get involved and how they organize themselves to accomplish the practical, organizational, and emotional tasks community sponsorship requires. This article contributes to this em...

Individuals with visual impairments often face a multitude of challenging obstacles in their daily lives. Vision impairment can severely impair a person's ability to work, navigate, and retain independence. This can result in educational limits, a higher risk of accidents, and a plethora of other issues. To address these challenges, we present Magi...

This paper presents a dual receding horizon output feedback controller for a general non linear stochastic system with imperfect information. The novelty of this controller is that stabilization is treated, inside the optimization problem, as a negative drift constraint on the control that is taken from the theory of stability of Markov chains. The...

The Philippines is one of the hardest-hit countries in Southeast Asia with the COVID-19 pandemic. Academic institutions in the country remained closed to students amid the pandemic and fully transitioned to online learning modalities, complying with government restrictions. Caraga State University (CSU) is among the educational institutions in the...

Torpedoes play an irreplaceable role in naval warfare; therefore, it is significant to study the dynamic response of the direct navigation of torpedoes. In order to study the dynamic response of torpedoes under different Munk moment coefficients, the dynamic equation of torpedoes is established based on the momentum theorem and the momentum moment...

Traditional methods on crack inspection for large infrastructures require a number of structural health inspection devices and instruments. They usually use the signal changes caused by physical deformations from cracks to detect the cracks, which is time-consuming and cost-ineffective. In this work, we propose a novel real-time crack inspection sy...

Small urban areas (SUAs) form the backbone of the polycentric urban structure of the EU. As such, their role in ensuring a balanced territorial development has been widely recognised at EU level. The diversity of SUAs – in terms of their settlement structures, functional roles and development trends – make it challenging to develop overarching reci...

Research in sociology and organization studies has consistently documented the tendency for organizations to develop wrongdoing practices that are at odds with the legal and moral frameworks of society. Often, this wrongdoing acquires a degree of normalization where it is endorsed, encouraged, and accepted throughout the organization. Such normaliz...