A RFID-based Personal Navigation System for Multi-Story Indoor Environments

[[abstract]]In this research, an active RFID-based personal navigation system for multi-story indoor environments is proposed. Without using complicated three-dimensional positioning algorithms, we employ an existing two-dimensional positioning engine and equip the system with the capability of seamless positioning handoffs between different floors. The handoff process is triggered by monitoring the received signal strength indicator (RSSI) value observed by the RFID reader deployed in the stairway. The usefulness of the proposed system is verified by conducting an experiment in a campus building. What distinguishes our work from other related works is that we focus on the capability of seamless positioning handoffs between floors, whereas none in the literature mentioned this feature, which we regard as a key to improve user experiences.[[conferencetype]]國際[[conferencedate]]20111026~20111028[[booktype]]紙本[[iscallforpapers]]Y[[conferencelocation]]Barcelona, Spai

A Personal Navigation System for Sightseeing across Multiple days

ICMU2006 : The Third International Conference on Mobile Computing and Ubiquitous Networking , Oct 11-13, 2006 , London, U.K.Recently, various personal navigation systems are available on the market. In this paper, we propose a new scheduling function to compose sightseeing tours across multiple days. Scheduling for multiple days is challenging since the number of possible sequences to travel destinations becomes huge and accommodation places have to be carefully chosen considering the schedules before and after each stay. So, some techniques are required to calculate the sightseeing schedule across multiple days at practically short time. In our method, we divide the target area into several sub-areas, and we restrict each day trip to be in a limited number of areas with infrequent passing of area boundary, in order to decrease the number of sequences. We have designed and implemented a genetic algorithm to solve this scheduling problem at a practical time. In this algorithm, accommodation places are represented in chromosome as exclusive alleles, to make schedules which contain only one accommodation place for each day. In order to evaluate our method, we made various sightseeing schedules across multiple days using the digital map of the Tohoku area (Japan Geographical Survey Institute numeric map 25000), and confirmed that the proposed algorithm could compute the near best 6 days schedule in several tens of seconds

Shallow Surveying in Hazardous Waters

Of order one importance to any study of nearshore processes is knowledge of the bathymetry in shallow water. This is true for studies on open coast sandy beaches where surf zone dynamics drive the system, inlet environments where bathymetric evolution can rapidly change navigation channels, and in more benign, lower-energy coastal environments that evolve slowly over 10’s to 100’s of years. Difficulties in obtaining shallow bathymetry where depth-limited wave breaking occurs, submerged hazards are present, or other harsh environments has led to the development of survey systems on highly maneuverable personal watercraft (Beach, et al., 1994; Cote, 1999; Dugan, et al., 1999; MacMahan, 2001). In this work we discuss shallow water surveying from the Coastal Bathymetry Survey System (CBASS), a Yamaha Waverunner equipped with differential GPS, single-beam 192 KHz acoustic echo-sounder, and onboard navigation system. Data obtained with the CBASS in three regions will be discussed, including an energetic surf zone located in southern California during the 2003 Nearshore Canyon Experiment (NCEX), on Lake Erie in 2002 (and compared with historical surveys dating back 150 years), and around Piscataqua River Inlet, NH, in 2007. Estimated accuracy (for sandy bottoms) in water depths ranging 1–10 m are 0.07-0.10 m in the vertical, and on the order of 0.1-1 m horizontally depending on water depth and bottom slope. The high maneuverability of the personal watercraft makes very shallow water bathymetric surveys possible with acoustic altimeters, particularly in regions where airborne remote sensing systems fail (owing to water clarity issues) or where repeated high resolution surveys are required (e.g., where an erodible bottom is rapidly evolving)

Using remote vision: The effects of video image frame rate on visual object recognition performance

This is the author's accepted manuscript. The final published article is available from the link below. Copyright @ 2010 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other users, including reprinting/ republishing this material for advertising or promotional purposes, creating new collective works for resale or redistribution to servers or lists, or reuse of any copyrighted components of this work in other works.The process of using remote vision was simulated in order to determine the effects of video image frame rate on the performance in visual recognition of stationary environmental hazards in the dynamic video footage of the pedestrian travel environment. The recognition performance was assessed against two different video image frame rate variations: 25 and 2 fps. The assessment included a range of objective and subjective criteria. The obtained results show that the effects of the frame rate variations on the performance are statistically insignificant. This paper belongs to the process of development of a novel system for navigation of visually impaired pedestrians. The navigation system includes a remote vision facility, and the visual recognition of the environmental hazards by the sighted human guide is a basic activity in aiding the visually impaired user of the system in mobility

An implementation of the path integrator mechanism of head direction cells for bio-mimetic navigation

© 2014 IEEE. Head direction cells are thought to be an integral part of the neural navigation system. These cells track the agent's current head direction irrespective of the host's location. In doing so, they process a combination of inputs: angular velocity and visual inputs are major effectors; to correctly encode the agent's current heading. There are close to fifteen models of head direction cell systems found in literature today. Very few of these models have been implemented for bio-mimetic navigation in robots. In this paper, we describe an implementation of the head direction cell system on the robot operating system (ROS) robotic platform as a first step towards a bio-mimetic navigation system for Willow Garage's personal robot 2 (PR2) robot

Studying the effects of in-vehicle information systems on driver visual behaviour – implications for design

In-vehicle information systems (IVIS) are a common feature in modern vehicles. The interaction of drivers with IVIS when driving must be considered to minimise distraction whilst maintaining the benefits provided. This research investigates the glance behaviours of drivers, assessed from video data, when using two functions – a personal navigation device (study 1) and a green driving advisory device (study 2). The main focus was to establish the number of glances of 2 seconds or more to the IVIS and relate this to driver safety (as stipulated in new guidelines for use of IVIS proposed by NHTSA). In study 1, the percentage of eyes- off-road time for drivers was much greater in the experimental (with device) condition compared to the baseline condition (14.3% compared to 6.7%) but, whilst glances to the personal navigation device accounted for the majority of the increase, there were very few which exceeded 2 seconds. Drivers in study 2 spent on average 4.3% of their time looking at the system, at an average of 0.43 seconds per glance; no glances exceeded 2 seconds. The research showed that ordinary use of IVIS (excluding manual interaction) does not lead to driver visual distraction and therefore the impact on safety is minimal. The results of the study have important design implications for future in-vehicle information systems

Simple Navigation in a Raster Map by GPS in PDA

Práce se zabývá návrhem a implementací aplikace pro osobní navigaci. Teoretická část seznamuje s problematikou navigace, systémem GPS a platformou pro kapesní počítače Windows Mobile. Cílem praktické části je vytvořit rozhraní pro navigaci v rastrové mapě a demonstrační aplikaci, která jej využívá.The thesis deals with design and implementation of application for personal navigation. The theoretical section introduces the field of navigation, GPS system and Windows Mobile platform. The aim of the practical section is to create an interface for map navigation, and a demonstrational application which employs it.

Personal navigation via high-resolution gait-corrected inertial measurement units

Journal ArticleAbstract-In this paper, a personal micronavigation system that uses high-resolution gait-corrected inertial measurement units is presented. The goal of this paper is to develop a navigation system that uses secondary inertial variables, such as velocity, to enable long-term precise navigation in the absence of Global Positioning System (GPS) and beacon signals. In this scheme, measured zerovelocity duration from the ground reaction sensors is used to reset the accumulated integration errors from accelerometers and gyroscopes in position calculation. With the described system, an average position error of 4 m is achieved at the end of half-hour walks