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Supporting Trajectory Udf Queries And Indexes On Postgis, Pyoung Woo Yang, Kwang Woo Nam 2017 Turbo Soft Inc.

Supporting Trajectory Udf Queries And Indexes On Postgis, Pyoung Woo Yang, Kwang Woo Nam

Free and Open Source Software for Geospatial (FOSS4G) Conference Proceedings

In this paper, we propose a system model for querying and indexing the GPS trajectory of moving objects on PostGIS/PostgreSQL. We developed moving object data types including MPoint(moving point), MDouble(moving double) for GPS trajectories. Also, various moving objects UDFs(user-defined functions) are implemented for moving objects queries. For efficient query processing, r-tree index is extended for trajectory, and pre-materialization techniques are proposed for fast UDF processing. Experimental results show that the pre-materialization techniques are about 1.2 times faster than naïve query processing using r-tree index.


Gis Investigation Of Crime Prediction With An Operationalized Tweet Corpus, Anthony J. Corso, Abdulkareem Alsudais 2017 California Baptist University

Gis Investigation Of Crime Prediction With An Operationalized Tweet Corpus, Anthony J. Corso, Abdulkareem Alsudais

Free and Open Source Software for Geospatial (FOSS4G) Conference Proceedings

Social media as the de facto communication channel is being used to disseminate one’s diurnal self-revelations. This profound discovery often contains double-talk, peculiar insights, or contextual information about real-world events. Natural language processing is regularly used to uncover both obvious and latent knowledge claims within disclosures published amid the complex environment. For example, a perpetrator with first-hand knowledge of their criminal incident uses social media to post critical information about it. A geographic information system (GIS) is capable of large-scale point data analysis and possesses methods that enable dataset processing, evaluation, and automatic spatial visualization. Such an artifact—fused ...


Qkan - Management Of Drainage System Data With Qgis, Jörg Höttges 2017 FH Aachen Univ. of Applied Sciences, Germany

Qkan - Management Of Drainage System Data With Qgis, Jörg Höttges

Free and Open Source Software for Geospatial (FOSS4G) Conference Proceedings

Based on QGIS a database structure and a set of plugins have been developed to improve the workflow for the hydraulic design of urban drainage systems for consulting engineers. The main goal is pre- and postprocessing in combination with various commercial hydraulic simulation software packages. The plugins provide import and export functionalities, simulation result viewing and generation of longitudinal cross sections in a CAD program. All modules make intensive use of SQL based spatial functions instead of functions implemented in QGIS, because of their stability, higher flexibility and speed due to the indexing functionality. On the other hand the database ...


Analyzing The Performance Of Nosql Vs. Sql Databases For Spatial And Aggregate Queries, Sarthak Agarwal, KS Rajan 2017 International Institute of Information Technology Hyderabad Gachibowli, Hyderabad, India

Analyzing The Performance Of Nosql Vs. Sql Databases For Spatial And Aggregate Queries, Sarthak Agarwal, Ks Rajan

Free and Open Source Software for Geospatial (FOSS4G) Conference Proceedings

Relational databases have been around for a long time and spatial databases have exploited this feature for close to two decades. The recent past has seen the development of NoSQL non-relational databases, which are now being adopted for spatial object storage and handling, too. While SQL databases face scalability and agility challenges and fail to take the advantage of the cheap memory and processing power available these days, NoSQL databases can handle the rise in the data storage and frequency at which it is accessed and processed - which are essential features needed in geospatial scenarios, which do not deal with ...


Residual Self-Interference Cancellation And Data Detection In Full-Duplex Communication Systems, Abbas Koohian, Hani Mehrpouyan, Ali Arshad Nasir, Salman Durrani, Steven D. Blostein 2017 Australian National University

Residual Self-Interference Cancellation And Data Detection In Full-Duplex Communication Systems, Abbas Koohian, Hani Mehrpouyan, Ali Arshad Nasir, Salman Durrani, Steven D. Blostein

Hani Mehrpouyan

Residual self-interference cancellation is an important practical requirement for realizing the full potential of full-duplex (FD) communication. Traditionally, the residual selfinterference is cancelled via digital processing at the baseband, which requires accurate knowledge of channel estimates of the desired and self-interference channels. In this work, we consider point-to-point FD communication and propose a superimposed signaling technique to cancel the residual self-interference and detect the data without estimating the unknown channels. We show that when the channel estimates are not available, data detection in FD communication results in ambiguity if the modulation constellation is symmetric around the origin. We demonstrate that ...


Reveiw Paper.Docx, shahariar rifat 2017 International Islamic University Chittagong (IIUC)

Reveiw Paper.Docx, Shahariar Rifat

shahariar rifat

No abstract provided.


A Hybrid Simulation Model Of Inbound Logistics Operations In Regional Food Supply Systems, Anuj Mittal, Caroline C. Krejci 2017 Iowa State University

A Hybrid Simulation Model Of Inbound Logistics Operations In Regional Food Supply Systems, Anuj Mittal, Caroline C. Krejci

Anuj Mittal

Regional food hubs aggregate, distribute, and market local food, with a goal of promoting environmental and social sustainability. They provide an alternative distribution channel through which small-scale producers can access wholesale markets. However, food hubs face many barriers to growth and success. In particular, they are often unable to achieve the logistical and operational efficiencies that characterize conventional large-scale food distribution. One possible method of improving food hub efficiency targets inbound logistics operations - specifically, the scheduling of producer deliveries to the food hub. In this paper, we describe a hybrid simulation model of the inbound logistics operations of a food ...


Qualitative Analysis Of Loss Of Control Aircraft Accidents Using Text Mining Techniques, Carolina Anderson, MaryJo O. Smith 2017 Embry-Riddle Aeronautical University – Daytona Beach

Qualitative Analysis Of Loss Of Control Aircraft Accidents Using Text Mining Techniques, Carolina Anderson, Maryjo O. Smith

International Journal of Aviation, Aeronautics, and Aerospace

The purpose of this study was to analyze the narrative National Transportation Safety Board (NTSB) accident cause descriptions for general aviation (GA) Loss of Control (LOC) accident reports by the different certification categories: Federal Aviation Regulations Part 23 (Part 23), Civil Air Regulations 3 (CAR 3), Light Sport Aircraft (LSA), and Experimental-Amateur Built (E-AB). Airworthiness certification categories represent a wide diversity of government oversight. Part 23 rules have evolved from the initial set of simpler design standards and have progressed into a comprehensive and strict set of rules to address the safety issues of the more complex airplanes within the ...


Assessing Situation Awareness In Unmanned Aircraft Systems Operations, Haydee M. Cuevas, Marisa Aguiar 2017 Embry-Riddle Aeronautical University - Daytona Beach

Assessing Situation Awareness In Unmanned Aircraft Systems Operations, Haydee M. Cuevas, Marisa Aguiar

International Journal of Aviation, Aeronautics, and Aerospace

The objective of this study was to investigate the potential utility of the Situation Awareness Linked Indicators Adapted to Novel Tasks (SALIANT) methodology as an assessment tool in unmanned aircraft systems (UAS) operations. Eighteen participants completed a UAS scenario (port security) as part of nine two-person crews (pilot and sensor operator). Subject matter experts mapped the naturally occurring team behaviors in the UAS scenario to create a SALIANT checklist, which was then used to rate participants’ SA. Results showed the SALIANT methodology was able to discriminate differences in SA behaviors among the UAS crews. Results also revealed significant correlations between ...


Detecting And Assessing Collision Potential Of Aircraft And Small Unmanned Aircraft Systems (Suas) By Visual Observers, Samuel M. Vance, Ryan J. Wallace, Jon M. Loffi, Jamey D. Jacob, Jared C. Dunlap, Taylor A. Mitchell 2017 Oklahoma State University - Main Campus

Detecting And Assessing Collision Potential Of Aircraft And Small Unmanned Aircraft Systems (Suas) By Visual Observers, Samuel M. Vance, Ryan J. Wallace, Jon M. Loffi, Jamey D. Jacob, Jared C. Dunlap, Taylor A. Mitchell

International Journal of Aviation, Aeronautics, and Aerospace

Visual observers are used to assist the Remote Pilot with maintaining sight of the unmanned aircraft as well as scanning the surrounding airspace for potential collision hazards. The purpose of this study was to examine the effectiveness of visual observers in detecting an intruding general aviation aircraft approaching the small unmanned aircraft system (sUAS) operations area. The study sought to determine the effectiveness of sUAS visual observers in detecting a general aviation aircraft collision hazard with a sUAS. Ten participants were asked to perform visual observer duties in support of a sUAS operation. Participants were asked to indicate when they ...


Hispanic Maternal And Children's Perceptions Of Neighborhood Safety Related To Walking And Cycling, Norma Olvera, Dennis W. Smith, Chanam Lee, Jian Liu, Jay Lee, Stephanie Kellam, Jun-Hyun Kim 2017 Marshall University

Hispanic Maternal And Children's Perceptions Of Neighborhood Safety Related To Walking And Cycling, Norma Olvera, Dennis W. Smith, Chanam Lee, Jian Liu, Jay Lee, Stephanie Kellam, Jun-Hyun Kim

Jian Liu

This study examined neighborhood safety as perceived by children (mean age=10 years) and their mothers, and its association with children's physical activity. For all eight safety items examined, children perceived their environment as less dangerous than mothers (p<0.05). None of the multiple regression models predicting children's physical activity by safety perceptions were significant (p>0.10). The maternal perception model explained the highest percentage of variance (R2=0.26), compared to the children's perception model (R2=0.22). Findings suggest that future studies should explore relations between self-reported and objectively measured safety barriers to Hispanic youth walking and cycling.


A Review Focujsed On The Psychological Effectiveness Of Tai Chi On Different Populations, Long Zhang, Thomas Lowder, Jian Liu 2017 Marshall University

A Review Focujsed On The Psychological Effectiveness Of Tai Chi On Different Populations, Long Zhang, Thomas Lowder, Jian Liu

Jian Liu

No abstract provided.


Sahabatqqasia.Com Agen Domino Qq Agen Domino 99 Dan Poker Online Aman Dan Terpercaya, Sahabat QQ Asia 2017 Selected Works

Sahabatqqasia.Com Agen Domino Qq Agen Domino 99 Dan Poker Online Aman Dan Terpercaya, Sahabat Qq Asia

SahabatQQasia.com Agen Domino QQ Agen Domino 99 Dan Poker Online Aman Dan Terpercaya


AGEN DOMINO QQ AGEN DOMINO 99 DAN POKER ONLINE AMAN DAN TERPERCAYA SAHABATQQASIA.COM mengadakan SEO Kontes-4 atau Kontes SEO Ke-4 yang akan di mulai pada tanggal 1 September 2017 - 1 December 2017, dengan Total Hadiah Rp. 120.000.000,- Ikuti dan Daftarkan diri Anda untuk memenangkan dan ikut menguji kemampuan SEO Anda. Siapkan website terbaik Anda untuk mengikuti kontes ini. Buktikan bahwa Anda adalah Ahli SEO disini. Saat yang tepat untuk mengetest kemampuan SEO Anda dengan tidak sia-sia, hadiah kontes ini adalah Rp 120.000 ...


Local Dynamic Stability Associated With Load Carrying, Jian Liu, Thurmon E. Lockhart 2017 Marshall University

Local Dynamic Stability Associated With Load Carrying, Jian Liu, Thurmon E. Lockhart

Jian Liu

Objectives: Load carrying tasks are recognized as one of the primary occupational factors leading to slip and fall injuries. Nevertheless, the mechanisms associated with load carrying and walking stability remain illusive. The objective of the current study was to apply local dynamic stability measure in walking while carrying a load, and to investigate the possible adaptive gait stability changes. Methods: Current study involved 25 young adults in a biomechanics research laboratory. One tri-axial accelerometer was used to measure three-dimensional low back acceleration during continuous treadmill walking. Local dynamic stability was quantified by the maximum Lyapunov exponent (maxLE) from a nonlinear ...


Aging Effect On Foot Dynamics During Unexpected Slips, Jian Liu, Thurmon E. Lockhart 2017 Marshall University

Aging Effect On Foot Dynamics During Unexpected Slips, Jian Liu, Thurmon E. Lockhart

Jian Liu

Slip-induced fall accidents have been recognized as a serious threat to the health of the elderly.The objective of the current study was to investigate the aging effect on the biomechanical reactions of both perturbed foot and unperturbed foot to the unexpected slips. Nineteen younger (mean age: 25.0 years old) and twenty-one older (mean age: 71.2 years old) adults were involved in a laboratory study,in which slippery surface was induced during walking without their awareness.The reactive responses of both slipping foot and unperturbed foot were quantified by optical motion capture system and force platforms.The results ...


Feasibility Analysis Of Electric Roadways, Regan Zane 2017 Utah State University

Feasibility Analysis Of Electric Roadways, Regan Zane

Funded Research and Data

No abstract provided.


Relative Target Estimation Using A Cascade Of Extended Kalman Filters, Jerel Nielsen, Randal Beard 2017 Brigham Young University - Provo

Relative Target Estimation Using A Cascade Of Extended Kalman Filters, Jerel Nielsen, Randal Beard

All Student Publications

This paper presents a method of tracking multiple ground targets from an unmanned aerial vehicle (UAV) in a 3D reference frame. The tracking method uses a monocular camera and makes no assumptions on the shape of the terrain or the target motion. The UAV runs two cascaded estimators. The first is an Extended Kalman Filter (EKF), which is responsible for tracking the UAV’s state, such as position and velocity relative to a fixed frame. The second estimator is an EKF that is responsible for estimating a fixed number of landmarks within the camera’s field of view. Landmarks are ...


Creating An Experimental Learning And Research Driven Spacesuit Lab For Erau, Ryan L. Kobrick, Erik Seedhouse 2017 Embry-Riddle Aeronautical University

Creating An Experimental Learning And Research Driven Spacesuit Lab For Erau, Ryan L. Kobrick, Erik Seedhouse

Ryan L. Kobrick

This paper evaluates key functional data parameters that must be considered for suborbital spaceflight participants wearing pressurized suits for intravehicular activity (IVA). Data parameters of an analog spacesuit worn in an analog flight environment were obtained from 40 civilian participants using the Suborbital Space Flight Simulator (SSFS) at Embry-Riddle Aeronautical University (ERAU) while donning Final Frontier Design’s (FFD) fully pressurized third-generation spacesuit as part of their training for Project PoSSUM (the Polar Suborbital Science in the Upper Mesosphere Project). The physiological data collected included: blood pressure, electrocardiograms, heart rate, grip strength, and skin temperature. These parameters were measured using ...


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Simulations Of A New Continuous Steelmaking Process, Jorg Annie Peter, Kent D. Peaslee, D. G. C. Robertson 2017 Missouri University of Science and Technology

Simulations Of A New Continuous Steelmaking Process, Jorg Annie Peter, Kent D. Peaslee, D. G. C. Robertson

D. G. C. Robertson

A new continuous steelmaking process has been designed in an effort to reduce meltshop costs and increase productivity beyond the possibilities of current EAF-LMF-CC meltshops. This paper discusses possible operational performance based on industrially-verified kinetic, thermodynamic, and heat-transfer models. Dynamic simulations predict variations in steel chemistry and temperature, resulting from steel treatment and upsets. Savings in costs are projected because of increased metallic yield, lower energy requirements, more efficient use of deoxidants and alloys, fewer man-hours per ton, and decreased capital investment.


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