Positional Accuracy of Assisted GPS Data from High-Sensitivity GPS-enabled Mobile Phones

2011 ◽  
Vol 64 (3) ◽  
pp. 381-399 ◽  
Author(s):  
Paul A. Zandbergen ◽  
Sean J. Barbeau
Keyword(s):  
Mobile Phone ◽  
Mobile Phones ◽  
High Sensitivity ◽  
Harsh Environments ◽  
Gps Data ◽  
Positional Accuracy ◽  
Gps Receivers ◽  
Location Data ◽  
Assisted Gps ◽  
The Difference

Utilizing both Assisted GPS (A-GPS) techniques and new high-sensitivity embedded GPS hardware, mobile phones are now able to achieve positioning in harsh environments such as urban canyons and indoor locations where older embedded GPS chips could not. This paper presents an empirical analysis of the positional accuracy of location data gathered using a high-sensitivity GPS-enabled mobile phone. The performance of the mobile phone is compared to that of regular recreational grade GPS receivers. Availability of valid GPS position fixes on the mobile phones tested was consistently close to 100% both outdoors and indoors. During static outdoor testing, positions provided by the mobile phones revealed a median horizontal error of between 5·0 and 8·5 m, substantially larger than those for regular autonomous GPS units by a factor of 2 to 3. Horizontal errors during static indoor testing were larger compared to outdoors, but the difference in accuracy between mobile phones and regular GPS receivers was reduced. Despite the modest performance of A-GPS on mobile phones, testing under various conditions revealed that very large errors are not very common. The maximum horizontal error during outdoor testing never exceeded 30 metres and during indoor testing never exceeded 100 metres. Combined with the relatively consistent availability of valid GPS position fixes under varying conditions, the current study has confirmed the reliability of A-GPS on mobiles phones as a source of location information for a range of different LBS applications.

Interrogating ‘Digital Korea’: Mobile Phone Tracking and the Spatial Expansion of Labour Control

2011 ◽  
Vol 141 (1) ◽  
pp. 107-117 ◽  
Author(s):  
Kwang-Suk Lee
Keyword(s):  
Mobile Phone ◽  
Mobile Phones ◽  
Political System ◽  
Spatial Expansion ◽  
Mobile Phone Use ◽  
Business Interests ◽  
Location Data ◽  
Mobile Tracking ◽  
Private Corporations ◽  
Space Of Flows

This study investigates the realistic conditions of ‘digital Korea’, especially as they are exemplified by the Samsung SDI scandal in South Korea. Samsung SDI, the world's largest plasma TV maker and a subsidiary of the Samsung Group, has fallen under suspicion due to using illegally cloned mobile phones to track the location data of some activist workers who tried to organise a union. The study stresses that this example of mobile tracking represents the shady side of mobile phone use created by management's excessive desire for labour control, and confirms that mobile tracking techniques make possible the spatial expansion of the scope of power. The spatial vocabulary of power is not totalitarian, but dispersed and nomadic in action, and resides in the space of ‘flows’ constructed by electronic impulses. This study discloses that, for private corporations, mobile tracking facilitates a form of efficient, invisible labour control over ‘targeted’ workers, even outside the workplace. It concludes that the control of labourers in Korea has been reinforced by the confluence of business interests, the under-developed political system and a societal lack of interest in privacy.

scholarly journals Quantification of the Accuracy of Low Priced GPS Receivers for Crash Location

2010 ◽  
Author(s):  
Thobias Sando ◽  
Renatus Mussa ◽  
John Sobanjo ◽  
Lisa Spainhour
Keyword(s):  
Global Positioning System ◽  
Time Of Day ◽  
Gps Data ◽  
Positioning System ◽  
Gps Receiver ◽  
Accuracy Improvement ◽  
Gps Receivers ◽  
Location Data ◽  
Global Positioning ◽  
Potential Tool

Global positioning system (GPS) has been identified as a potential tool for capturing crash location data. This study quantifies factors that could affect the accuracy of GPS receivers. The results showed that GPS receiver orientation, site obstructions, and weather have significant effects on the accuracy of GPS receivers. Time of day and number of satellites were not found to significantly affect the accuracy of GPS receivers. HDOP values of 1.2 or less were found to be adequate for crash location purposes. An accuracy improvement of 20.7% was realized by filtering GPS data based on HDOP values.

scholarly journals Visualizing Social and Behavior Change due to the Outbreak of COVID-19 Using Mobile Phone Location Data

2021 ◽  
Author(s):  
Takayuki Mizuno ◽  
Takaaki Ohnishi ◽  
Tsutomu Watanabe
Keyword(s):  
Behavior Change ◽  
Mobile Phone ◽  
Shopping Centers ◽  
Residential Areas ◽  
Night Time ◽  
Location Data ◽  
The Difference ◽  
And Behavior

AbstractWe visualize the rates of stay-home for residents by region using the difference between day-time and night-time populations to detect residential areas, and then observing the numbers of people leaving residential areas. There are issues with measuring stay-home rates by observing numbers of people visiting downtown areas, such as central urban shopping centers and major train stations. The first is that we cannot eliminate the possibility that people will avoid areas being observed and go to other areas. The second is that for people visiting downtown areas, we cannot know where they reside. These issues can be resolved if we quantify the degree of stay-home using the number of people leaving residential areas. There are significant differences in stay-home levels by region throughout Japan. By this visualization, residents of each region can see whether their level of stay-home is adequate or not, and this can provide incentive toward compliance suited to the residents of the region.

Mobile Phones as a Lens into Slum Dynamics

2012 ◽  
pp. 334-352
Author(s):  
Amy Wesolowski ◽  
Nathan Eagle
Keyword(s):  
Mobile Phone ◽  
Mobile Phones ◽  
Urban Areas ◽  
Large Scale ◽  
Mobile Phone Data ◽  
Data Sets ◽  
Location Data ◽  
Planning Decisions ◽  
Large Scale Data ◽  
Slum Dwellers

The worldwide adoption of mobile phones is providing researchers with an unprecedented opportunity to utilize large-scale data to better understand human behavior. This chapter highlights the potential use of mobile phone data to better understand the dynamics driving slums in Kenya. Given slum dwellers informal and transient lifetimes (in terms of places of employment, living situations, etc.), comprehensive longitude behavioral data sets are rare. Working with communication and location data from Kenya’s leading mobile phone operator, the authors use mobile phone data as a window into the social, mobile, and economic dimensions of slum dwellers. The authors address questions about the functionality of slums in urban areas in terms of economic, social, and migratory dynamics. In particular, the authors discuss economic mobility in slums, the importance of social networks, and the connectivity between slums and other urban areas. With four years until the 2015 deadline to meet the Millennium Development Goals, including the goal to improve the lives of slum dwellers worldwide, there is a great need for tools to make development and urban planning decisions more beneficial and precise.

scholarly journals Is exposure to personal music players a confounder in adolescent mobile phone use and hearing health studies?

2018 ◽  
Vol 46 (11) ◽  
pp. 4527-4534 ◽  
Author(s):  
Geza Benke ◽  
Christina Dimitriadis ◽  
Berihun M. Zeleke ◽  
Imo Inyang ◽  
Dean McKenzie ◽  
...  
Keyword(s):  
Mobile Phone ◽  
Mobile Phones ◽  
Pure Tone ◽  
Hearing Threshold ◽  
Pure Tone Audiometry ◽  
Mobile Phone Use ◽  
Hearing Thresholds ◽  
Significant Difference ◽  
Health Studies ◽  
The Difference

Objective This study was performed to determine whether exposure to personal music players (PMPs) in the immediate morning prior to hearing testing confounds the association between mobile phone use and hearing thresholds of adolescents. Design In this cohort study of cognitive function in year 7 students (median age 13 years, range 11–14), information regarding the weekly use of mobile phones and the use of PMPs was assessed by a questionnaire. Pure-tone audiometry was used to establish hearing thresholds for all participants. Results Among a cohort of 317 adolescents (60.9% females), 130 were unexposed to PMP use while 33 were exposed to PMP use in the morning prior to hearing testing. No statistically significant difference in hearing threshold shifts was found between adolescents who were and were not exposed to PMP use prior to hearing testing. Likewise, the difference in the use of mobile phones according to the PMP use status was not statistically significant. Conclusion Exposure to PMPs prior to hearing testing did not introduce confounding in the present study of mobile phone use and hearing loss among adolescents.

Modeling arterial signal coordination for bus priority using mobile phone GPS data

2020 ◽  
Vol 47 (9) ◽  
pp. 1094-1104
Author(s):  
Yuanwen Lai ◽  
Xinying Xu ◽  
Said M. Easa ◽  
Peikun Lian
Keyword(s):  
Mobile Phone ◽  
Analytical Model ◽  
Mobile Phones ◽  
Low Frequency ◽  
Simulation Software ◽  
Signal Timing ◽  
Gps Data ◽  
Bus Priority ◽  
Signal Coordination ◽  
Simulation Based

Limited by the low-frequency data acquisition, vehicle global positioning system (GPS) data are difficult to implement in the area of microtraffic simulation. Based on the functional design of mobile phone positioning technology, mobile phones can be used to acquire bus GPS data every second. In this paper, an analytical model is proposed to determine the parameters of signal coordination for bus priority along an arterial based on GPS data of mobile phones. First, bus priority evaluation indicators are established using bus GPS data, which are acquired by mobile phones. Second, the signal timing parameters of the arterial road are optimized, and a preliminary timing plan is developed by evaluating small changes in the plan. Finally, the corresponding final plan is developed using VISSIM micro simulation software. The feasibility of the analytical model is verified by simulating an actual arterial in Fuzhou city, China.

scholarly journals Exploring teachers’ increased knowledge of the potential of mobile phone use: pilot study reducing the difference between students’ and teachers’ ideas

2020 ◽  
Vol 25 (5) ◽  
pp. 3759-3778
Author(s):  
Tiina Leino Lindell
Keyword(s):  
Pilot Study ◽  
Mobile Phone ◽  
Division Of Labor ◽  
Mobile Phones ◽  
Mobile Phone Use ◽  
School Activities ◽  
Crucial Problem ◽  
Research Questions ◽  
The Difference ◽  
Cultural Historical Activity

AbstractIt has been emphasized that students and teachers have dissimilar ideas about how mobile phone use could be utilized and limited. Moreover, these differences have been identified as a crucial problem that has caused conflicts in education. In order to resolve the problem, research has stressed that it is very important to increase teachers’ knowledge about how mobile phones can be used in students’ work. However, the topic of how teachers could increase their understanding related to students’ ideas has remained largely unexamined. Thus, this pilot study explores the following research questions using cultural-historical activity theory and qualitative methods: How is teachers’ possibility knowledge influenced when they are exposed to students’ ideas about how mobile phones could be both supportive and problematic in school activities? What are the similarities and differences between the students’ ideas that have, and have not, influenced the teachers’ possibility knowledge of mobile phone use? The results show how the teachers’ possibility knowledge increases concerning the features that could be both supportive and problematic and must be limited by rules and a division of labor. Moreover, it transpires that the teachers’ possibility knowledge is not always affected. It appears that the teachers’ understanding is influenced if they can relate the students’ ideas to the teachers’ division of labor. These results could be used by schools to resolve problems caused by the different ideas of students and teachers regarding mobile phone use. The results could also be used when implementing mobile phones in educational research.

Correlating Personality and Actual Phone Usage

2014 ◽  
Vol 35 (3) ◽  
pp. 158-165 ◽  
Author(s):  
Christian Montag ◽  
Konrad Błaszkiewicz ◽  
Bernd Lachmann ◽  
Ionut Andone ◽  
Rayna Sariyska ◽  
...  
Keyword(s):  
Big Data ◽  
Social Network ◽  
Mobile Phone ◽  
Mobile Phones ◽  
Self Report ◽  
Psychological Variables ◽  
New Approach ◽  
Report Data ◽  
Self Report Data ◽  
Voice Calls

In the present study we link self-report-data on personality to behavior recorded on the mobile phone. This new approach from Psychoinformatics collects data from humans in everyday life. It demonstrates the fruitful collaboration between psychology and computer science, combining Big Data with psychological variables. Given the large number of variables, which can be tracked on a smartphone, the present study focuses on the traditional features of mobile phones – namely incoming and outgoing calls and SMS. We observed N = 49 participants with respect to the telephone/SMS usage via our custom developed mobile phone app for 5 weeks. Extraversion was positively associated with nearly all related telephone call variables. In particular, Extraverts directly reach out to their social network via voice calls.

Retail Mix Dan Kepuasan Konsumen Minimarket

Liquidity ◽  
2018 ◽  
Vol 7 (1) ◽  
pp. 53-62
Author(s):  
Siti Maryama ◽  
Yayat Sujatna
Keyword(s):  
Consumer Satisfaction ◽  
Quantitative Method ◽  
Descriptive Analysis ◽  
T Test ◽  
Primary Data ◽  
Retail Industry ◽  
Location Data ◽  
Store Design ◽  
Customer Services ◽  
The Difference

The purpose of this study is to (1) analyzing the level of retail mix consumer satisfaction; (2) analyze the dominant variable in retail mix consumer satisfaction; (3) analyze the difference of retail mix consumer satisfaction performed. The observed of the retail industry is Alfamidi and Indomaret. The study was designed into a descriptive-quantitative method. The source of primary data obtained from the questionnaire of 100 respondents. The formulating variable of retail mix includes: merchandise assortments, pricing, customer services Store design and display, communication mix, and location. Data analyze by using descriptive, analysis of factors, and t-test. The result confirmed that the level of retail mix consumer satisfaction in both industry is relatively similar. However, it can be stated that the respondents were more satisfied to Indomaret compared with Alfamart.

The Effect of Prestige Sensitivity on Price Acceptance in Vietnam’s Mobile Phone Market

2018 ◽  
pp. 97-112
Author(s):  
Huyen Thi Nguyen ◽  
Ngoc Minh Nguyen
Keyword(s):  
Mobile Phone ◽  
Mobile Phones ◽  
Structural Equation ◽  
Sampling Method ◽  
Product Knowledge ◽  
Mediating Role ◽  
Modelling Method ◽  
Equation Modelling ◽  
Convenience Sampling

The purpose of this study is to examine the effect of prestige sensitivity on mobile phone customer’s price acceptance in Vietnam and the mediating role of product knowledge and price mavenism on this relationship. We used the convenience sampling method for data collection via questionnaires with a sample of 605 consumers who purchased mobile phones. The collected data was analysed by applying a structural equation modelling method. The result indicates that prestige sensitivity has both direct and indirect effects on price acceptance via product knowledge and price mavenism. The findings suggest that prestige sensitivity can be used as a market segmentation criterion for mobile phones when making price decisions and providing customers with adequate information could improve price acceptance.

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