Download or read book Knowledge Inference from Smartphone GPS Data written by Mohsen Rezaie and published by . This book was released on 2018 with total page 124 pages. Available in PDF, EPUB and Kindle. Book excerpt: With the advent of the incorporation of GPS receivers and then GPS-enabled smartphones in transportation data collection, many studies have looked at how to infer meaningful information from this data. Research in this field has concentrated on the use of heuristics and supervised machine learning methods to detect trip ends, trip itineraries, travel mode and trip purpose. Until now approaches to inference have relied on the use of fully-validated data. However, respondent burden associated with validation lowers participation rates and reduces the amount of precisely validated data because some people do not validate their trips or misreport them. This thesis consists of two studies. In the first study I propose the application of a semi-supervised method to mode detection from smartphone travel survey data. Semi-supervised methods let researchers and planners use both validated and un-validated data. I compare the accuracy of three popular supervised methods (Decision Tree, Random Forest and Logistic Regression) with a simple semi-supervised method (Label Propagation with KNN kernel). Simple features such as speed, duration and length of trip and closeness of start and end points to transit network are used for model estimation. The results show that the semi-supervised method outperforms the supervised methods in the presence of high proportions of un-validated data and better predicts the observations in the test set. Furthermore, the run-time of the best model among the supervised methods was on average almost 16 times longer than the average run-times of the semi-supervised method. In the second study, I develop a method to infer transit itineraries from smartphone travel survey data. Since the application of semi-supervised algorithms in travel surveys and transit itinerary detection are both in the early stages of development, a supervised approach is taken to tackle the problem of transit itinerary detection. To this end, trip features were extracted from smartphone collected data and transit network information available in the General Transit Feed Specification (GTFS) format. Based on these features, a Random Forest model was trained. Using the model, transit routes for 62% of trip segments was correctly detected.

Download or read book Travel Behavior Characteristics Analysis Technology Based on Mobile Phone Location Data written by Fei Yang and published by Springer Nature. This book was released on 2022-03-19 with total page 235 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is devoted to the technology and methodology of individual travel behavior analysis and refined travel information extraction. Traditional resident trip surveys are characterized by many shortcomings, such as subjective memory errors, difficulty in organization and high cost. Therefore, in this book, a set of refined extraction and analysis techniques for individual travel activities is proposed. It provides a solid foundation for the optimization and reconstruction of traffic theoretical models, urban traffic planning, management and decision-making. This book helps traffic engineering researchers, traffic engineering technicians and traffic industry managers understand the difficulties and challenges faced by transportation big data. Additionally, it helps them adapt to changes in traffic demand and the technological environment to achieve theoretical innovation and technological reform.

Download or read book Semantics in Mobile Sensing written by Zhixian Yan and published by Springer Nature. This book was released on 2022-06-01 with total page 131 pages. Available in PDF, EPUB and Kindle. Book excerpt: The dramatic progress of smartphone technologies has ushered in a new era of mobile sensing, where traditional wearable on-body sensors are being rapidly superseded by various embedded sensors in our smartphones. For example, a typical smartphone today, has at the very least a GPS, WiFi, Bluetooth, triaxial accelerometer, and gyroscope. Alongside, new accessories are emerging such as proximity, magnetometer, barometer, temperature, and pressure sensors. Even the default microphone can act as an acoustic sensor to track noise exposure for example. These sensors act as a ""lens"" to understand the user's context along different dimensions. Data can be passively collected from these sensors without interrupting the user. As a result, this new era of mobile sensing has fueled significant interest in understanding what can be extracted from such sensor data both instantaneously as well as considering volumes of time series from these sensors. For example, GPS logs can be used to determine automatically the significant places associated to a user's life (e.g., home, office, shopping areas). The logs may also reveal travel patterns, and how a user moves from one place to another (e.g., driving or using public transport). These may be used to proactively inform the user about delays, relevant promotions from shops, in his ""regular"" route. Similarly, accelerometer logs can be used to measure a user's average walking speed, compute step counts, gait identification, and estimate calories burnt per day. The key objective is to provide better services to end users. The objective of this book is to inform the reader of the methodologies and techniques for extracting meaningful information (called ""semantics"") from sensors on our smartphones. These techniques form the cornerstone of several application areas utilizing smartphone sensor data. We discuss technical challenges and algorithmic solutions for modeling and mining knowledge from smartphone-resident sensor data streams. This book devotes two chapters to dive deep into a set of highly available, commoditized sensors---the positioning sensor (GPS) and motion sensor (accelerometer). Furthermore, this book has a chapter devoted to energy-efficient computation of semantics, as battery life is a major concern on user experience.

Download or read book Semantics in Mobile Sensing written by Zhixian Yan and published by Springer Nature. This book was released on 2022-06-01 with total page 131 pages. Available in PDF, EPUB and Kindle. Book excerpt: The dramatic progress of smartphone technologies has ushered in a new era of mobile sensing, where traditional wearable on-body sensors are being rapidly superseded by various embedded sensors in our smartphones. For example, a typical smartphone today, has at the very least a GPS, WiFi, Bluetooth, triaxial accelerometer, and gyroscope. Alongside, new accessories are emerging such as proximity, magnetometer, barometer, temperature, and pressure sensors. Even the default microphone can act as an acoustic sensor to track noise exposure for example. These sensors act as a ""lens"" to understand the user's context along different dimensions. Data can be passively collected from these sensors without interrupting the user. As a result, this new era of mobile sensing has fueled significant interest in understanding what can be extracted from such sensor data both instantaneously as well as considering volumes of time series from these sensors. For example, GPS logs can be used to determine automatically the significant places associated to a user's life (e.g., home, office, shopping areas). The logs may also reveal travel patterns, and how a user moves from one place to another (e.g., driving or using public transport). These may be used to proactively inform the user about delays, relevant promotions from shops, in his ""regular"" route. Similarly, accelerometer logs can be used to measure a user's average walking speed, compute step counts, gait identification, and estimate calories burnt per day. The key objective is to provide better services to end users. The objective of this book is to inform the reader of the methodologies and techniques for extracting meaningful information (called ""semantics"") from sensors on our smartphones. These techniques form the cornerstone of several application areas utilizing smartphone sensor data. We discuss technical challenges and algorithmic solutions for modeling and mining knowledge from smartphone-resident sensor data streams. This book devotes two chapters to dive deep into a set of highly available, commoditized sensors---the positioning sensor (GPS) and motion sensor (accelerometer). Furthermore, this book has a chapter devoted to energy-efficient computation of semantics, as battery life is a major concern on user experience.

Download or read book Emergent Trends in Personal Mobile and Handheld Computing Technologies written by Hu, Wen-Chen and published by IGI Global. This book was released on 2012-04-30 with total page 433 pages. Available in PDF, EPUB and Kindle. Book excerpt: "This book offers a vital research within the field of personal computing, highlighting the latest trends in research and development of personal technology"--Provided by publisher.

Download or read book Mobile Technologies for Activity Travel Data Collection and Analysis written by Rasouli, Soora and published by IGI Global. This book was released on 2014-06-30 with total page 426 pages. Available in PDF, EPUB and Kindle. Book excerpt: "This book concentrates on one particular and fast-growing application of mobile technologies: data acquisition for the tourism industry, providing travel agents, visitors, and hosts with the most advanced data mining methods, empirical research findings, and computational analysis techniques necessary to compete effectively in the global tourism industry"--Provided by publisher.

Download or read book Practical Aspects of Knowledge Management written by Takahira Yamaguchi and published by Springer. This book was released on 2008-12-08 with total page 292 pages. Available in PDF, EPUB and Kindle. Book excerpt: The biennial PAKM Conference Series o?ers a communication platform and meeting ground for practitioners and researchers involved in developing and deploying advanced business solutions for the management of knowledge in - ganizations. PAKM is a forum for people to share their views, exchange ideas, develop new insights, and envision completely new kinds of knowledge mana- ment solutions. PAKM2008,the7thInternationalConferenceonPracticalAspectsofKno- edge Management, was held in Yokohama, Japan, for the ?rst time. Although all past PAKM conferences were held in Europe (Basel and Vienna), the PAKM Steering Committee decided two yearsago that the PAKM conferenceshould be “on tour”: it should be organized by di?erent people and be hosted in di?erent places all over the world. For this year’s conference we received 62 submissions from 23 countries and 3 reviewers were assigned to one paper from the members of the Program C- mittee and the additional reviewers. Thus 23 good papers were selected. They cover a great variety of approaches to knowledge management, which tackle the topic from many di?erent angles. It is this very diversity that makes PAKM unique, while at the same time focusing on the one issue of managing knowledge within organizations. Many people were involved in setting up PAKM 2008. We would like to express our warm thanks to everybody who contributed to making it a success.

Download or read book Gerontechnology written by José García-Alonso and published by Springer. This book was released on 2019-04-13 with total page 380 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book constitutes the thoroughly refereed post-conference proceedings of the First International Workshop on Gerotechnology, IWoG 2018, held in Cáceres, Spain on December 14, 2018, and in Évora, Portugal, on December 17, 2018. The 24 revised full papers along with 8 short papers presented were carefully reviewed and selected from 71 submissions.The papers are organized in topical sections on knowledge management for health: context, cognition, behavior and user modeling; technologies to increase the quality of life of the elderly population; Internet of Things (IoT); smarts technologies and algorithms for health; monitoring and management of chronic and non-chronic diseases;solutions for active aging, social integration and self-care; health interventions to support caregivers of elderly people; public health initiatives.

Download or read book Information Technology and Systems written by Álvaro Rocha and published by Springer Nature. This book was released on 2020-01-30 with total page 726 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is composed by the papers accepted for presentation and discussion at The 2019 International Conference on Information Technology & Systems (ICITS'20), held at the Universidad Distrital Francisco José de Caldas, in Bogotá, Colombia, on 5th to 7th February 2020. ICIST is a global forum for researchers and practitioners to present and discuss recent findings and innovations, current trends, professional experiences and challenges of modern information technology and systems research, together with their technological development and applications. The main topics covered are: information and knowledge management; organizational models and information systems; software and systems modelling; software systems, architectures, applications and tools; multimedia systems and applications; computer networks, mobility and pervasive systems; intelligent and decision support systems; big data analytics and applications; human–computer interaction; ethics, computers & security; health informatics; information technologies in education.

Download or read book Internet of Things Information Processing in an Increasingly Connected World written by Leon Strous and published by Springer. This book was released on 2019-03-19 with total page 243 pages. Available in PDF, EPUB and Kindle. Book excerpt: This open access book constitutes the refereed post-conference proceedings of the First IFIP International Cross-Domain Conference on Internet of Things, IFIPIoT 2018, held at the 24th IFIP World Computer Congress, WCC 2018, in Poznan, Poland, in September 2018. The 12 full papers presented were carefully reviewed and selected from 24 submissions. Also included in this volume are 4 WCC 2018 plenary contributions, an invited talk and a position paper from the IFIP domain committee on IoT. The papers cover a wide range of topics from a technology to a business perspective and include among others hardware, software and management aspects, process innovation, privacy, power consumption, architecture, applications.

Download or read book Mobile Computing Concepts Methodologies Tools and Applications written by Taniar, David and published by IGI Global. This book was released on 2008-11-30 with total page 3721 pages. Available in PDF, EPUB and Kindle. Book excerpt: "This multiple-volume publication advances the emergent field of mobile computing offering research on approaches, observations and models pertaining to mobile devices and wireless communications from over 400 leading researchers"--Provided by publisher.

Download or read book Location and Context Awareness written by Jeffrey Hightower and published by Springer. This book was released on 2007-09-14 with total page 306 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book constitutes the refereed proceedings of the Third International Symposium on Location- and Context-Awareness, LoCA 2007, held in Oberpfaffenhofen, Germany, in September 2007. The papers are organized in topical sections on wifi location technology, activity and situational awareness, taxonomies, architectures, and in a broader perspective, the meaning of place, radio issue in location technology, and new approaches to location estimation.

Download or read book Handbook of Mobility Data Mining Volume 1 written by Haoran Zhang and published by Elsevier. This book was released on 2023-01-29 with total page 224 pages. Available in PDF, EPUB and Kindle. Book excerpt: Handbook of Mobility Data Mining, Volume One: Data Preprocessing and Visualization introduces the fundamental technologies of mobile big data mining (MDM), advanced AI methods, and upper-level applications, helping readers comprehensively understand MDM with a bottom-up approach. The book explains how to preprocess mobile big data, visualize urban mobility, simulate and predict human travel behavior, and assess urban mobility characteristics and their matching performance as conditions and constraints in transport, emergency management, and sustainability development systems. The book contains crucial information for researchers, engineers, operators, administrators, and policymakers seeking greater understanding of current technologies' infra-knowledge structure and limitations. Further, the book introduces how to design MDM platforms that adapt to the evolving mobility environment, new types of transportation, and users based on an integrated solution that utilizes sensing and communication capabilities to tackle significant challenges faced by the MDM field. This volume focuses on how to efficiently pre-process mobile big data to extract and utilize critical feature information of high-dimensional city people flow. The book first provides a conceptual theory and framework, then discusses data sources, trajectory map-matching, noise filtering, trajectory data segmentation, data quality assessment, and more, concluding with a chapter on privacy protection in mobile big data mining. Introduces the characteristics of different mobility data sources, like GPS, CDR, and sensor-based mobility data Summarizes existing visualization technologies of the current transportation system into a multi-view frame, covering the perspective of the three leading actors Provides recommendations for practical open-source tools and libraries for system visualization Stems from the editor’s strong network of global transport authorities and transport companies, providing a solid knowledge structure and data foundation as well as geographical and stakeholder coverage

Download or read book Location and Context Awareness written by Thomas Strang and published by Springer. This book was released on 2005-05-03 with total page 389 pages. Available in PDF, EPUB and Kindle. Book excerpt: Context-awareness is one of the drivers of the ubiquitous computing paradigm. Well-designed context modeling and context retrieval approaches are key p- requisites in any context-aware system. Location is one of the primary aspects of all major context models — together with time, identity and activity. From the technical side, sensing, fusing and distributing location and other context information is as important as providing context-awareness to applications and services in pervasive systems. Thematerialsummarizedinthisvolumewasselectedforthe1stInternational Workshop on Location- and Context-Awareness (LoCA 2005) held in coope- tion with the 3rd International Conference on Pervasive Computing 2005. The workshop was organized by the Institute of Communications and Navigation of the German Aerospace Center (DLR) in Oberpfa?enhofen, and the Mobile and Distributed Systems Group of the University of Munich. During the workshop, novel positioning algorithms and location sensing te- niques were discussed, comprising not only enhancements of singular systems, like positioning in GSM or WLAN, but also hybrid technologies, such as the integration of global satellite systems with inertial positioning. Furthermore, - provements in sensor technology, as well as the integration and fusion of sensors, were addressed both on a theoretical and on an implementation level. Personal and con?dential data, such as location data of users, have p- found implications for personal information privacy. Thus privacy protection, privacy-oriented location-aware systems, and how privacy a?ects the feasibility and usefulness of systems were also addressed in the workshop.

Download or read book Secure IT Systems written by Helger Lipmaa and published by Springer. This book was released on 2017-11-03 with total page 318 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book constitutes the proceedings of the 22nd Nordic Conference on Secure IT Systems, held in Tartu, Estonia, in November 2017. The 18 full papers presented were carefully reviewed and selected from 42 submissions. The papers address a broad range of topics in IT security and privacy. They are organized in the following topical sections: outsourcing computations; privacy preservation; security and privacy in machine learning; applications; access control; and emerging security areas.

Download or read book Mobile Services for Toy Computing written by Patrick C. K. Hung and published by Springer. This book was released on 2015-08-24 with total page 194 pages. Available in PDF, EPUB and Kindle. Book excerpt: The goal of this book is to crystallize the emerging mobile computing technologies and trends by focusing on the most promising solutions in services computing. The book will provide clear proof that mobile technologies are playing an increasingly important and critical role in supporting toy computing. The goal of this book is to bring together academics and practitioners to describe the use and synergy between the above-mentioned technologies. This book is intended for researchers and students working in computer science and engineering, as well as toy industry technology providers, having particular interests in mobile services.

Download or read book Mobile Application Development Usability and Security written by Mukherjea, Sougata and published by IGI Global. This book was released on 2016-10-19 with total page 338 pages. Available in PDF, EPUB and Kindle. Book excerpt: The development of mobile technology has experienced exponential growth in recent years. Mobile devices are ubiquitous in modern society, impacting both our personal and professional lives. Mobile Application Development, Usability, and Security provides a thorough overview on the different facets of mobile technology management and its integration into modern society. Highlighting issues related to analytics, cloud computing, and different types of application development, this book is a pivotal reference source for professionals, researchers, upper-level students, and practitioners actively involved in the area of mobile computing.