Automated time activity classification based on global positioning system (GPS) tracking data

Introduction. Increasingly physical activity (PA) is being recognized as an important outcome in non–small cell lung cancer (NSCLC). We investigated PA using novel global positioning system (GPS) tracking individuals with NSCLC and a group of similar-aged healthy individuals. Methods. A prospective cross-sectional multicenter study. Fifty individuals with NSCLC from 3 Australian tertiary hospitals and 35 similar-aged healthy individuals without cancer were included. Individuals with NSCLC were assessed pretreatment. Primary measures were triaxial accelerometery (steps/day) and GPS tracking (outdoor PA behavior). Secondary measures were questionnaires assessing depression, motivation to exercise, and environmental barriers to PA. Between-group comparisons were analyzed using analysis of covariance. Results. Individuals with NSCLC engaged in significantly less PA than similar-aged healthy individuals (mean difference 2363 steps/day, P = .007) and had higher levels of depression ( P = .027) and lower motivation to exercise ( P = .001). Daily outdoor walking time ( P = .874) and distance travelled away from home ( P = .883) were not different between groups. Individuals with NSCLC spent less time outdoors in their local neighborhood area ( P < .001). A greater number of steps per day was seen in patients who were less depressed ( r = .39) or had better access to nonresidential destinations such as shopping centers ( r = .25). Conclusion. Global positioning system tracking appears to be a feasible methodology for adult cancer patients and holds promise for use in future studies investigating PA and or lifestyle behaviors.

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Travel mode detection method based on big smartphone global positioning system tracking data

Advances in Mechanical Engineering ◽

10.1177/1687814017708134 ◽

2017 ◽

Vol 9 (6) ◽

pp. 168781401770813 ◽

Cited By ~ 4

Author(s):

Chaoran Zhou ◽

Hongfei Jia ◽

Jingxin Gao ◽

Lili Yang ◽

Yixiong Feng ◽

...

Keyword(s):

Global Positioning System ◽

Detection Method ◽

Positioning System ◽

Tracking Data ◽

Travel Mode ◽

Mode Detection ◽

Global Positioning ◽

Global Positioning System Tracking

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Study of the Effect of the Geometrical Correction of the Satellite Image on the Global Positioning System Tracking by Using Geographical Information System

Journal of King Abdulaziz University-Engineering Sciences ◽

10.4197/eng.23-2.9 ◽

2012 ◽

Vol 23 (2) ◽

pp. 173-187

Author(s):

صباح حسين علي صباح حسين علي

Keyword(s):

Information System ◽

Coordinate System ◽

Geographical Information System ◽

Global Positioning System ◽

Satellite Image ◽

Geographical Information ◽

Gps Tracking ◽

Positioning System ◽

Positional Accuracy ◽

Global Positioning

The use of Global Positioning System (GPS) for geometrical correction (rectification) of the satellite imagery aims to establish the relation between the image coordinate system and the GPS readout coordinate system. By using this technique, the errors existing within satellite image can be calibrated and reduced as well. This paper introduces application of Geographical Information System (GIS) and image processing software in addition to GPS for measuring the coordinates of waypoints to be as ground control points (GCPs) for the geometrical correction process of the QuickBird satellite image for the adopted study area (Mosul City). For comparison purpose, the geodetic rectification process was also done for the adopted QuickBird satellite image with respect to the IKONOS imagery. Due to the low standards in the geometric design characteristics of the road which badly affected the GPS measurements, the output results show that the geodetic rectification of the QuickBird imagery with respect to IKONOS satellite image gives more accuracy of results than GCP acquired by GPS. The overall procedure applied in the present study shows the ability to give an improvement in the positional accuracy of an already georeferenced coordinate system of the QuickBird image which in turn gives a higher accuracy of the GPS tracking path for the purpose of mapping, urban planning, cartography, survey and other GIS applications .

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Route Recapitulation and Route Loyalty in Homing Pigeons: Pilotage From 25 km?

Journal of Navigation ◽

10.1017/s0373463305003541 ◽

2005 ◽

Vol 59 (1) ◽

pp. 43-53 ◽

Cited By ~ 12

Author(s):

Dora Biro ◽

Jessica Meade ◽

Tim Guilford

Keyword(s):

Global Positioning System ◽

Columba Livia ◽

Gps Tracking ◽

Positioning System ◽

Training Phase ◽

General Area ◽

Homing Pigeons ◽

Global Positioning ◽

Route Choices ◽

Terrain Features

We utilised precision Global Positioning System (GPS) tracking to examine the homing paths of pigeons (Columba livia) released 20 times consecutively 25 km from the loft. By the end of the training phase, birds had developed highly stereotyped yet individually distinct routes home, with detailed recapitulation evident at each stage of the journey. Following training, birds also participated in a series of releases from novel sites at perpendicular distances of up to 3 km from their established routes. Results showed that subjects were attracted back to their established routes and recapitulated them from the point of contact. Naïve conspecifics (yoked controls) released from the same off-route sites confirmed that the experienced birds' route choices were not influenced by constraints exerted by terrain features, but that increased experience with the general area conferred a homing advantage in the form of more efficient flight tracks, even from these novel sites. Patterns in the paths taken by experienced birds to rejoin their established routes are discussed with reference to navigational mechanisms employed by homing pigeons in their familiar area.

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Tracking Using GPS Technology

Tracking Tourists ◽

10.23912/9781911635383-4573 ◽

2020 ◽

Author(s):

Anne Hardy

Keyword(s):

Mobile Phones ◽

Global Positioning System ◽

Gps Tracking ◽

Positioning System ◽

Precise Location ◽

Tourism Research ◽

Gps Technology ◽

Global Positioning ◽

Technological Improvements

The use of global positioning system (GPS) technology underpins many different methods of tracking. GPS tracking involves the use of a beacon that sends the location of a device to satellites to determine the precise location of the beacon. In recent years, technological improvements have meant that GPS tracking units have become exponentially smaller in size. Whereas early portable beacons such as the Magellan (launched in 1989) were 22 cm in length and around 700 grams in weight, if not larger than television screens, they can now fit into the back of watches and mobile phones (Shoval and Isaacson, 2010). This chapter will explore the development of GPS technology and its application to tourism research, when utilised with portable GPS loggers.

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Measuring Delays for Bicycles at Signalized Intersections Using Smartphone GPS Tracking Data

ISPRS International Journal of Geo-Information ◽

10.3390/ijgi9030174 ◽

2020 ◽

Vol 9 (3) ◽

pp. 174 ◽

Cited By ~ 1

Author(s):

Dominique Gillis ◽

Sidharta Gautama ◽

Casper Van Gheluwe ◽

Ivana Semanjski ◽

Angel J. Lopez ◽

...

Keyword(s):

Global Positioning System ◽

Arrival Rate ◽

Signalized Intersections ◽

Gps Tracking ◽

Tracking Data ◽

Average Delay ◽

Global Positioning ◽

Before And After ◽

Sample Frequency ◽

Expected Values

The article describes an application of global positioning system (GPS) tracking data (floating bike data) for measuring delays for cyclists at signalized intersections. For selected intersections, we used trip data collected by smartphone tracking to calculate the average delay for cyclists by interpolation between GPS locations before and after the intersection. The outcomes were proven to be stable for different strategies in selecting the GPS locations used for calculation, although GPS locations too close to the intersection tended to lead to an underestimation of the delay. Therefore, the sample frequency of the GPS tracking data is an important parameter to ensure that suitable GPS locations are available before and after the intersection. The calculated delays are realistic values, compared to the theoretically expected values, which are often applied because of the lack of observed data. For some of the analyzed intersections, however, the calculated delays lay outside of the expected range, possibly because the statistics assumed a random arrival rate of cyclists. This condition may not be met when, for example, bicycles arrive in platoons because of an upstream intersection. This justifies that GPS-based delays can form a valuable addition to the theoretically expected values.

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