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Quality assessment of OpenStreetMap data using trajectory mining

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Geo-Spatial Information Science 2016年第1期19卷 56-68页

作者： Anahid Basiri Mike Jackson Pouria Amirian Amir Pourabdollah Monika Sester Adam Winstanley terry moore Lijuan Zhang The Nottingham Geospatial Institute The University of NottinghamNottinghamUK Ordnance Survey SouthamptonUK The School of Computer Science The University of NottinghamNottinghamUK Institute of Cartography and Geoinformatics(IKG) Leibniz UniversitätHannoverGermany e Department of Computer Science Maynooth UniversityMaynoothIreland Faculty of Civil and Environmental Engineering The Technion-Israel Institute of TechnologyHaifaIsrael

OpenStreetMap(OSM)data are widely used but their reliability is still *** contributors to OSM have not been trained in geography or surveying and consequently their contributions,including geometry and attribute data inserts,deletions,and updates,can be inaccurate,incomplete,inconsistent,or *** are some mechanisms and applications dedicated to discovering bugs and errors in OSM *** systems can remove errors through user-checks and applying predefined rules but they need an extra control process to check the real-world validity of suspected errors and *** paper focuses on finding bugs and errors based on patterns and rules extracted from the tracking data of *** underlying idea is that certain characteristics of user trajectories are directly linked to the type of *** such rules,some sets of potential bugs and errors can be identified and stored for further investigations.

关键词： Spatial data quality OpenStreetMap(OSM) trajectory data mining

Integrity monitoring of fixed ambiguity Precise Point Positioning(PPP)solutions

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Geo-Spatial Information Science 2013年第3期16卷 141-148页

作者： Altti JOKINEN Shaojun FENG Wolfgang SCHUSTER Washington OCHIENG Chris HIDE terry moore Chris HILL Department of Civil and Environmental Engineering Imperial College London Centre for Transport StudiesLondon SW72AZUK Nottingham Geospatial Institute(NGI) University of NottinghamNottingham NG72TUUK

Traditional positioning methods,such as conventional Real Time Kinematic(cRTK)rely upon local reference networks to enable users to achieve high-accuracy *** need for such relatively dense networks has significant cost *** Point Positioning(PPP)on the other hand is a positioning method capable of centimeter-level positioning without the need for such local networks,hence providing significant cost benefits especially in remote *** paper presents the state-of-the-art PPP method using both GPS and GLONASS measurements to estimate the float position solution before attempting to resolve GPS integer *** monitoring is carried out using the Imperial College Carrier-phase Receiver Autonomous Integrity Monitoring method.A new method to detect and exclude GPS base-satellite failures is developed.A base-satellite is a satellite whose measurements are differenced from other satellite’s measurements when using between-satellite-differenced measurements to estimate *** failure detection and exclusion methods are tested using static GNSS data recorded by International GNSS Service stations both in static and dynamic processing *** results show that failure detection can be achieved in all cases tested and failure exclusion can be achieved for static *** the kinematic processing cases,failure exclusion is more difficult because the higher noise in the measurement residuals increases the difficulty to distinguish between failures associated with the base-satellite and other satellites.

关键词： Precise Point Positioning(PPP) integrity ambiguity resolution failure exclusion

Restimate:Recovery Estimation Tool for Resilience Planning

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Journal of Safety Science and Resilience 2024年第1期5卷 47-63页

作者： Scott Miles Megan Ly Nick terry Youngjun Choe Department of Human Centered Design&Engineering Campus Box 352315University of WashingtonSeattleWA 98195United States of America Department of Industrial&Systems Engineering Box 352650University of WashingtonSeattleWA 98195United States of America

The *** Institute of Standards and Technology(NIST)published the Community Resilience Planning Guide in *** NIST Guide advocates for a participatory process for developing a performance measurement framework for the jurisdiction’s resilience against a scenario *** framework centers around tables of expected and desired recovery times for selected community assets,such as electricity,water,and natural gas *** NIST Guide does not provide a method for estimating the expected recovery ***,building high-fidelity computer models for such estimations requires substantial resources that even larger ju-risdictions cannot *** most promising approach to recovery time estimation is to systematically use data elicited from people to tap into the wisdom of the(knowledgeable)*** paper describes a novel research-through-design project to enable the computer-supported elicitation of recovery time series *** work is the first in the literature to examine people’s ability to estimate recovery curves and how design in-fluences such *** main contribution to resilience planning is three-fold:development of a new elicitation tool called Restimate,understanding its potential user base,and providing insights into how it can facilitate resilience *** is the first tool to enable evidence-based expert elicitation in any community with limited resources for resilience *** resilience planning,those who facilitate high-stakes planning activities under large uncertainties(e.g.,mission-critical system design and planning)will benefit from a similar research-through-design process.

关键词： expert elicitation disaster natural hazard infrastructure community resilience restoration user-centered design computer-supported cooperative work

A flexible,thin-film microchannel electrode array device for selective subdiaphragmatic vagus nerve recording

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Microsystems & Nanoengineering 2024年第1期10卷 115-128页

作者： Jongcheon Lim Peter A.Zoss terry L.Powley Hyowon Lee Matthew P.Ward Weldon School of Biomedical Engineering Purdue UniversityWest LafayetteINUSA Birck Nanotechnology Center Purdue UniversityWest LafayetteINUSA Center for Implantable Devices Purdue UniversityWest LafayetteINUSA Department of Psychological Sciences Purdue UniversityWest LafayetteINUSA Purdue Institute of Integrative Neuroscience Purdue UniversityWest LafayetteINUSA Indiana University School of Medicine IndianapolisINUSA

The vagus nerve(VN)plays an important role in regulating physiological conditions in the gastrointestinal(GI)tract by communicating via the parasympathetic pathway to the enteric nervous system(ENS).However,the lack of knowledge in the neurophysiology of the VN and GI tract limits the development of advanced treatments for autonomic dysfunctions related to the *** better understand the complicated underlying mechanisms of the VN-GI tract neurophysiology,it is necessary to use an advanced device enabled by microfabrication *** several candidates including intraneural probe array and extraneural cuff electrodes,microchannel electrode array devices can be used to interface with smaller numbers of nerve fibers by securing them in the separate channel *** microchannel electrode array devices to interface teased nerve structures are relatively bulky with thickness around 200µ*** thick design can potentially harm the delicate tissue structures,including the nerve *** this paper,we present a flexible thin film based microchannel electrode array device(thickness:11.5µm)that can interface with one of the subdiaphragmatic nerve branches of the VN in a *** demonstrated recording evoked compound action potentials(ECAP)from a transected nerve ending that has multiple nerve ***,our analysis confirmed that the signals are from C-fibers that are critical in regulating autonomic neurophysiology in the GI tract.

关键词： electrode recording film

Upsilon Constants and Their Usefulness in Planck Scale Quantum Cosmology

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Journal of Modern Physics 2024年第2期15卷 167-173页

作者： Eugene terry Tatum Independent Researcher Bowling Green Kentucky USA

This paper introduces the two Upsilon constants to the reader. Their usefulness is described with respect to acting as coupling constants between the CMB temperature and the Hubble constant. In addition, this paper summarizes the current state of quantum cosmology with respect to the Flat Space Cosmology (FSC) model. Although the FSC quantum cosmology formulae were published in 2018, they are only rearrangements and substitutions of the other assumptions into the original FSC Hubble temperature formula. In a real sense, this temperature formula was the first quantum cosmology formula developed since Hawking’s black hole temperature formula. A recent development in the last month proves that the FSC Hubble temperature formula can be derived from the Stephan-Boltzmann law. Thus, this Hubble temperature formula effectively unites some quantum developments with the general relativity model inherent in FSC. More progress towards unification in the near-future is expected.

关键词： Quantum Cosmology Hubble Constant Planck Scale Upsilon Constant Flat Space Cosmology Black Holes CMB Temperature ΛCDM Cosmology Quantum Gravity Unification

A Solution to the Cosmological Constant Problem Using the Holographic Principle (A Brief Note)

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Journal of Modern Physics 2024年第2期15卷 159-166页

作者： Eugene terry Tatum Independent Researcher Bowling Green Kentucky USA

This paper integrates a quantum conception of the Planck epoch early universe with FSC model formulae and the holographic principle, to offer a reasonable explanation and solution of the cosmological constant problem. Such a solution does not appear to be achievable in cosmological models which do not integrate black hole formulae with quantum formulae such as the Stephan-Boltzmann law. As demonstrated herein, assuming a constant value of Lambda over the great span of cosmic time appears to have been a mistake. It appears that Einstein’s assumption of a constant, in terms of vacuum energy density, was not only a mistake for a statically-balanced universe, but also a mistake for a dynamically-expanding universe.

关键词： Quantum Cosmology Planck Scale Cosmological Constant Black Holes Holographic Principle Flat Space Cosmology AdS-CFT ER = EPR Cosmology Model

Black Hole Complementarity in Terms of the Outsider and Insider Perspectives

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Journal of Modern Physics 2024年第2期15卷 184-192页

作者： Eugene terry Tatum Independent Researcher Bowling Green Kentucky USA

A complementarity hypothesis concerning outsider and insider perspectives of a gargantuan black hole is proposed. The two thought experiments presented herein are followed by a brief discussion of a new interpretation of black hole interior “space-and-time-reversal”. Specifically, it is proposed that the “singularity” space of the black hole interior is time-like and the expansion time of the black hole interior is space-like. The resemblance of this new insider interpretation to our own expanding and redshifting big bang universe is compelling.

关键词： Black Holes Complementarity Cosmological Models Rh = ct Models Flat Space Cosmology Schwarzschild Cosmology Thought Experiment Dark Energy Quantum Vacuum

Comparison of Numerical Weather Models in Estimating the GNSS Signals Slant Tropospheric Delay

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Comparison of Numerical Weather Models in Estimating the GNS...

Particle Filtering in Collaborative Indoor Positioning

第四届中国卫星导航学术年会

作者： Lei Yang Chris Hill Chris Hide terry moore Nottingham Geospatial Institute University of Nottingham

For high accuracy Global Navigation Satellite Systems （GNSS） positioning, such as Precise Point Positioning （PPP）, the troposphere delay remains one of the major error sources. The PPP convergence time and vertical positioning accuracy are influenced by the applied tropospheric model and mapping function. Due to the lack of real time atmosphere information, the accuracies of both the model and mapping function are limited. In the past decades, Numerical Weather Modelling （NWM） has experienced a period of rapid development. With the support of high performance supercomputers, NWM uses a 3D grid model to describe or forecast the atmospheric physical conditions, such as pressure, temperature, humidity, etc. These information could enable high accuracy direct estimation of the slant tropospheric delay （STD）. In contrast to the traditional mapping function approach, direct estimation on individual STDs can avoid the assumption that the site local weather condition is a balanced profile, thus the troposphere delays are estimated on both signal elevation and azimuth. This paper will review the technique of NWM based direct STD estimation, and investigate its resolution requirement as well as the real time applicability. Various products from the Unified Model （UM）, provided by the United Kingdom Met Office, is used in this study. In the resolution test, the troposphere delay estimation based on the UM North Atlantic and European （NAE） regional product （12-km horizontal resolution） is compared with estimation based on the UM global product （40-km horizontal resolution）. The high resolution product could provide a better estimation accuracy, but with the cost of a larger data volume. This test is aiming to initially investigate the estimation accuracy from different atmospheric information resolutions. In the real time applicability test, the troposphere delay estimation based on the UM forecast field product is compared with estimation based on the analyzed field. Although

关键词： GNSS Tropospheric Delay NWM PPP

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Particle Filtering in Collaborative Indoor Positioning